MAX77802 is a PMIC that contains 10 high efficiency Buck regulators,
32 Low-dropout (LDO) regulators, two 32kHz buffered clock outputs,
a Real-Time-Clock (RTC) and a I2C interface to program the individual
regulators, clocks and the RTC.
This series are based on drivers added by Simon Glass to the Chrome OS
kernel and adds support for the Maxim 77802 Power Management IC, their
regulators, clocks, RTC and I2C interface. The series depend on patch:
"[PATCH v3] ARM: dts: Add cros_ec to exynos5420-peach-pit and exynos5800-peach-pi"
https://patchwork.kernel.org/patch/4411351/
which adds tps65090 support to Peach boards since regulators from this
PMIC supply power to a set of MAX77802 regulators.
This is the seventh version of the patch-set that addresses issues pointed
out in v6. Individual changes are added on each patch change log.
Patches 1-17 are cleanups and improvements to the MAX77686 PMIC driver
as a preparation to also support the MAX77802 PMIC. Patch 18 adds support
for MAX77802 to the MAX77686 mfd driver and Patch 19 adds the DT binding
doc for this PMIC. Patch 20 adds support for the regulators in the PMIC,
Patch 21 adds support for the clocks in the PMIC and Patch 22 adds its DT
binding. Patch 23 adds support for the Real-Time-Clock found in the PMIC
and Patch 24 adds the needed device nodes for the max77802 to the Exynos5
base Peach Pit and Pi boards device tree source files.
The patch-set has been tested on both Daisy/Snow (max77686) and Peach
Pit (max77802) Chromebooks and it's composed of the following patches:
Doug Anderson (1):
rtc: max77686: Allow the max77686 rtc to wakeup the system
Javier Martinez Canillas (23):
mfd: max77686: Convert to use regmap_irq
mfd: max77686: Add power management support
mfd: max77686: Don't define dummy function if OF isn't enabled
mfd: max77686: Make platform data over-rule DT
mfd: max77686: Return correct error when pdata isn't found
mfd: max77686: Make error checking consistent
mfd: max77686: Remove unneeded OOM error message
mfd: max77686: Add Dynamic Voltage Scaling (DVS) support
rtc: max77686: Remove dead code for SMPL and WTSR.
clk: max77686: Add DT include for MAX77686 PMIC clock
clk: Add generic driver for Maxim PMIC clocks
clk: max77686: Convert to the generic max clock driver
clk: max77686: Improve Maxim 77686 PMIC clocks binding
regmap: Add regmap_reg_copy function
regulator: max77686: Setup DVS-related GPIOs on probe
mfd: max77686: Add documentation for DVS bindings
mfd: max77686: Add Maxim 77802 PMIC support
mfd: max77802: Add DT binding documentation
regulator: Add driver for Maxim 77802 PMIC regulators
clk: Add driver for Maxim 77802 PMIC clocks
clk: max77802: Add DT binding documentation
rtc: Add driver for Maxim 77802 PMIC Real-Time-Clock
ARM: dts: Add max77802 to exynos5420-peach-pit and exynos5800-peach-pi
.../devicetree/bindings/clock/maxim,max77686.txt | 16 +-
.../devicetree/bindings/clock/maxim,max77802.txt | 44 ++
Documentation/devicetree/bindings/mfd/max77686.txt | 34 ++
Documentation/devicetree/bindings/mfd/max77802.txt | 95 ++++
arch/arm/boot/dts/exynos5420-peach-pit.dts | 382 +++++++++++++
arch/arm/boot/dts/exynos5800-peach-pi.dts | 382 +++++++++++++
drivers/base/regmap/regmap.c | 34 ++
drivers/clk/Kconfig | 11 +
drivers/clk/Makefile | 2 +
drivers/clk/clk-max-gen.c | 192 +++++++
drivers/clk/clk-max-gen.h | 32 ++
drivers/clk/clk-max77686.c | 183 +------
drivers/clk/clk-max77802.c | 98 ++++
drivers/mfd/Kconfig | 7 +-
drivers/mfd/Makefile | 2 +-
drivers/mfd/max77686-irq.c | 319 -----------
drivers/mfd/max77686.c | 442 +++++++++++++--
drivers/regulator/Kconfig | 9 +
drivers/regulator/Makefile | 1 +
drivers/regulator/max77686.c | 34 ++
drivers/regulator/max77802.c | 609 +++++++++++++++++++++
drivers/rtc/Kconfig | 10 +
drivers/rtc/Makefile | 1 +
drivers/rtc/rtc-max77686.c | 146 ++---
drivers/rtc/rtc-max77802.c | 508 +++++++++++++++++
include/dt-bindings/clock/maxim,max77686.h | 23 +
include/dt-bindings/clock/maxim,max77802.h | 22 +
include/linux/mfd/max77686-private.h | 237 +++++++-
include/linux/mfd/max77686.h | 78 ++-
include/linux/regmap.h | 9 +
30 files changed, 3289 insertions(+), 673 deletions(-)
create mode 100644 Documentation/devicetree/bindings/clock/maxim,max77802.txt
create mode 100644 Documentation/devicetree/bindings/mfd/max77802.txt
create mode 100644 drivers/clk/clk-max-gen.c
create mode 100644 drivers/clk/clk-max-gen.h
create mode 100644 drivers/clk/clk-max77802.c
delete mode 100644 drivers/mfd/max77686-irq.c
create mode 100644 drivers/regulator/max77802.c
create mode 100644 drivers/rtc/rtc-max77802.c
create mode 100644 include/dt-bindings/clock/maxim,max77686.h
create mode 100644 include/dt-bindings/clock/maxim,max77802.h
--
2.0.0.rc2
By using the generic IRQ support in the Register map API, it
is possible to get rid max77686-irq.c and simplify the code.
Suggested-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Javier Martinez Canillas <[email protected]>
Acked-by: Lee Jones <[email protected]>
Reviewed-by: Doug Anderson <[email protected]>
Tested-by: Doug Anderson <[email protected]>
--
Changes since v6: None
Changes since v5: None
Changes since v4:
- Remove left over defines not used anymore. Suggested by Krzysztof Kozlowski.
Changes since v3: None
Changes since v2:
- Cleanup regmap irqchips on i2c_driver .remove function.
Suggested by Doug Anderson.
- Remove unused MAX77686_IRQ_NR enum. Suggested by Doug Anderson.
---
drivers/mfd/Kconfig | 1 +
drivers/mfd/Makefile | 2 +-
drivers/mfd/max77686-irq.c | 319 -----------------------------------
drivers/mfd/max77686.c | 97 ++++++++++-
drivers/rtc/rtc-max77686.c | 27 +--
include/linux/mfd/max77686-private.h | 31 +++-
include/linux/mfd/max77686.h | 2 -
7 files changed, 123 insertions(+), 356 deletions(-)
delete mode 100644 drivers/mfd/max77686-irq.c
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index b8d9ca0..3010204 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -384,6 +384,7 @@ config MFD_MAX77686
depends on I2C=y
select MFD_CORE
select REGMAP_I2C
+ select REGMAP_IRQ
select IRQ_DOMAIN
help
Say yes here to add support for Maxim Semiconductor MAX77686.
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 4e2bc25..f001487 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -115,7 +115,7 @@ da9063-objs := da9063-core.o da9063-irq.o da9063-i2c.o
obj-$(CONFIG_MFD_DA9063) += da9063.o
obj-$(CONFIG_MFD_MAX14577) += max14577.o
-obj-$(CONFIG_MFD_MAX77686) += max77686.o max77686-irq.o
+obj-$(CONFIG_MFD_MAX77686) += max77686.o
obj-$(CONFIG_MFD_MAX77693) += max77693.o
obj-$(CONFIG_MFD_MAX8907) += max8907.o
max8925-objs := max8925-core.o max8925-i2c.o
diff --git a/drivers/mfd/max77686-irq.c b/drivers/mfd/max77686-irq.c
deleted file mode 100644
index cdc3280..0000000
--- a/drivers/mfd/max77686-irq.c
+++ /dev/null
@@ -1,319 +0,0 @@
-/*
- * max77686-irq.c - Interrupt controller support for MAX77686
- *
- * Copyright (C) 2012 Samsung Electronics Co.Ltd
- * Chiwoong Byun <[email protected]>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * This driver is based on max8997-irq.c
- */
-
-#include <linux/err.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <linux/gpio.h>
-#include <linux/mfd/max77686.h>
-#include <linux/mfd/max77686-private.h>
-#include <linux/irqdomain.h>
-#include <linux/regmap.h>
-
-enum {
- MAX77686_DEBUG_IRQ_INFO = 1 << 0,
- MAX77686_DEBUG_IRQ_MASK = 1 << 1,
- MAX77686_DEBUG_IRQ_INT = 1 << 2,
-};
-
-static int debug_mask = 0;
-module_param(debug_mask, int, 0);
-MODULE_PARM_DESC(debug_mask, "Set debug_mask : 0x0=off 0x1=IRQ_INFO 0x2=IRQ_MASK 0x4=IRQ_INI)");
-
-static const u8 max77686_mask_reg[] = {
- [PMIC_INT1] = MAX77686_REG_INT1MSK,
- [PMIC_INT2] = MAX77686_REG_INT2MSK,
- [RTC_INT] = MAX77686_RTC_INTM,
-};
-
-static struct regmap *max77686_get_regmap(struct max77686_dev *max77686,
- enum max77686_irq_source src)
-{
- switch (src) {
- case PMIC_INT1 ... PMIC_INT2:
- return max77686->regmap;
- case RTC_INT:
- return max77686->rtc_regmap;
- default:
- return ERR_PTR(-EINVAL);
- }
-}
-
-struct max77686_irq_data {
- int mask;
- enum max77686_irq_source group;
-};
-
-#define DECLARE_IRQ(idx, _group, _mask) \
- [(idx)] = { .group = (_group), .mask = (_mask) }
-static const struct max77686_irq_data max77686_irqs[] = {
- DECLARE_IRQ(MAX77686_PMICIRQ_PWRONF, PMIC_INT1, 1 << 0),
- DECLARE_IRQ(MAX77686_PMICIRQ_PWRONR, PMIC_INT1, 1 << 1),
- DECLARE_IRQ(MAX77686_PMICIRQ_JIGONBF, PMIC_INT1, 1 << 2),
- DECLARE_IRQ(MAX77686_PMICIRQ_JIGONBR, PMIC_INT1, 1 << 3),
- DECLARE_IRQ(MAX77686_PMICIRQ_ACOKBF, PMIC_INT1, 1 << 4),
- DECLARE_IRQ(MAX77686_PMICIRQ_ACOKBR, PMIC_INT1, 1 << 5),
- DECLARE_IRQ(MAX77686_PMICIRQ_ONKEY1S, PMIC_INT1, 1 << 6),
- DECLARE_IRQ(MAX77686_PMICIRQ_MRSTB, PMIC_INT1, 1 << 7),
- DECLARE_IRQ(MAX77686_PMICIRQ_140C, PMIC_INT2, 1 << 0),
- DECLARE_IRQ(MAX77686_PMICIRQ_120C, PMIC_INT2, 1 << 1),
- DECLARE_IRQ(MAX77686_RTCIRQ_RTC60S, RTC_INT, 1 << 0),
- DECLARE_IRQ(MAX77686_RTCIRQ_RTCA1, RTC_INT, 1 << 1),
- DECLARE_IRQ(MAX77686_RTCIRQ_RTCA2, RTC_INT, 1 << 2),
- DECLARE_IRQ(MAX77686_RTCIRQ_SMPL, RTC_INT, 1 << 3),
- DECLARE_IRQ(MAX77686_RTCIRQ_RTC1S, RTC_INT, 1 << 4),
- DECLARE_IRQ(MAX77686_RTCIRQ_WTSR, RTC_INT, 1 << 5),
-};
-
-static void max77686_irq_lock(struct irq_data *data)
-{
- struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
-
- if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
- pr_info("%s\n", __func__);
-
- mutex_lock(&max77686->irqlock);
-}
-
-static void max77686_irq_sync_unlock(struct irq_data *data)
-{
- struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
- int i;
-
- for (i = 0; i < MAX77686_IRQ_GROUP_NR; i++) {
- u8 mask_reg = max77686_mask_reg[i];
- struct regmap *map = max77686_get_regmap(max77686, i);
-
- if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
- pr_debug("%s: mask_reg[%d]=0x%x, cur=0x%x\n",
- __func__, i, mask_reg, max77686->irq_masks_cur[i]);
-
- if (mask_reg == MAX77686_REG_INVALID ||
- IS_ERR_OR_NULL(map))
- continue;
-
- max77686->irq_masks_cache[i] = max77686->irq_masks_cur[i];
-
- regmap_write(map, max77686_mask_reg[i],
- max77686->irq_masks_cur[i]);
- }
-
- mutex_unlock(&max77686->irqlock);
-}
-
-static const inline struct max77686_irq_data *to_max77686_irq(int irq)
-{
- struct irq_data *data = irq_get_irq_data(irq);
- return &max77686_irqs[data->hwirq];
-}
-
-static void max77686_irq_mask(struct irq_data *data)
-{
- struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
- const struct max77686_irq_data *irq_data = to_max77686_irq(data->irq);
-
- max77686->irq_masks_cur[irq_data->group] |= irq_data->mask;
-
- if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
- pr_info("%s: group=%d, cur=0x%x\n",
- __func__, irq_data->group,
- max77686->irq_masks_cur[irq_data->group]);
-}
-
-static void max77686_irq_unmask(struct irq_data *data)
-{
- struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
- const struct max77686_irq_data *irq_data = to_max77686_irq(data->irq);
-
- max77686->irq_masks_cur[irq_data->group] &= ~irq_data->mask;
-
- if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
- pr_info("%s: group=%d, cur=0x%x\n",
- __func__, irq_data->group,
- max77686->irq_masks_cur[irq_data->group]);
-}
-
-static struct irq_chip max77686_irq_chip = {
- .name = "max77686",
- .irq_bus_lock = max77686_irq_lock,
- .irq_bus_sync_unlock = max77686_irq_sync_unlock,
- .irq_mask = max77686_irq_mask,
- .irq_unmask = max77686_irq_unmask,
-};
-
-static irqreturn_t max77686_irq_thread(int irq, void *data)
-{
- struct max77686_dev *max77686 = data;
- unsigned int irq_reg[MAX77686_IRQ_GROUP_NR] = {};
- unsigned int irq_src;
- int ret;
- int i, cur_irq;
-
- ret = regmap_read(max77686->regmap, MAX77686_REG_INTSRC, &irq_src);
- if (ret < 0) {
- dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
- ret);
- return IRQ_NONE;
- }
-
- if (debug_mask & MAX77686_DEBUG_IRQ_INT)
- pr_info("%s: irq_src=0x%x\n", __func__, irq_src);
-
- if (irq_src == MAX77686_IRQSRC_PMIC) {
- ret = regmap_bulk_read(max77686->regmap,
- MAX77686_REG_INT1, irq_reg, 2);
- if (ret < 0) {
- dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
- ret);
- return IRQ_NONE;
- }
-
- if (debug_mask & MAX77686_DEBUG_IRQ_INT)
- pr_info("%s: int1=0x%x, int2=0x%x\n", __func__,
- irq_reg[PMIC_INT1], irq_reg[PMIC_INT2]);
- }
-
- if (irq_src & MAX77686_IRQSRC_RTC) {
- ret = regmap_read(max77686->rtc_regmap,
- MAX77686_RTC_INT, &irq_reg[RTC_INT]);
- if (ret < 0) {
- dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
- ret);
- return IRQ_NONE;
- }
-
- if (debug_mask & MAX77686_DEBUG_IRQ_INT)
- pr_info("%s: rtc int=0x%x\n", __func__,
- irq_reg[RTC_INT]);
-
- }
-
- for (i = 0; i < MAX77686_IRQ_GROUP_NR; i++)
- irq_reg[i] &= ~max77686->irq_masks_cur[i];
-
- for (i = 0; i < MAX77686_IRQ_NR; i++) {
- if (irq_reg[max77686_irqs[i].group] & max77686_irqs[i].mask) {
- cur_irq = irq_find_mapping(max77686->irq_domain, i);
- if (cur_irq)
- handle_nested_irq(cur_irq);
- }
- }
-
- return IRQ_HANDLED;
-}
-
-static int max77686_irq_domain_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hw)
-{
- struct max77686_dev *max77686 = d->host_data;
-
- irq_set_chip_data(irq, max77686);
- irq_set_chip_and_handler(irq, &max77686_irq_chip, handle_edge_irq);
- irq_set_nested_thread(irq, 1);
-#ifdef CONFIG_ARM
- set_irq_flags(irq, IRQF_VALID);
-#else
- irq_set_noprobe(irq);
-#endif
- return 0;
-}
-
-static struct irq_domain_ops max77686_irq_domain_ops = {
- .map = max77686_irq_domain_map,
-};
-
-int max77686_irq_init(struct max77686_dev *max77686)
-{
- struct irq_domain *domain;
- int i;
- int ret;
- int val;
- struct regmap *map;
-
- mutex_init(&max77686->irqlock);
-
- if (max77686->irq_gpio && !max77686->irq) {
- max77686->irq = gpio_to_irq(max77686->irq_gpio);
-
- if (debug_mask & MAX77686_DEBUG_IRQ_INT) {
- ret = gpio_request(max77686->irq_gpio, "pmic_irq");
- if (ret < 0) {
- dev_err(max77686->dev,
- "Failed to request gpio %d with ret:"
- "%d\n", max77686->irq_gpio, ret);
- return IRQ_NONE;
- }
-
- gpio_direction_input(max77686->irq_gpio);
- val = gpio_get_value(max77686->irq_gpio);
- gpio_free(max77686->irq_gpio);
- pr_info("%s: gpio_irq=%x\n", __func__, val);
- }
- }
-
- if (!max77686->irq) {
- dev_err(max77686->dev, "irq is not specified\n");
- return -ENODEV;
- }
-
- /* Mask individual interrupt sources */
- for (i = 0; i < MAX77686_IRQ_GROUP_NR; i++) {
- max77686->irq_masks_cur[i] = 0xff;
- max77686->irq_masks_cache[i] = 0xff;
- map = max77686_get_regmap(max77686, i);
-
- if (IS_ERR_OR_NULL(map))
- continue;
- if (max77686_mask_reg[i] == MAX77686_REG_INVALID)
- continue;
-
- regmap_write(map, max77686_mask_reg[i], 0xff);
- }
- domain = irq_domain_add_linear(NULL, MAX77686_IRQ_NR,
- &max77686_irq_domain_ops, max77686);
- if (!domain) {
- dev_err(max77686->dev, "could not create irq domain\n");
- return -ENODEV;
- }
- max77686->irq_domain = domain;
-
- ret = request_threaded_irq(max77686->irq, NULL, max77686_irq_thread,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
- "max77686-irq", max77686);
-
- if (ret)
- dev_err(max77686->dev, "Failed to request IRQ %d: %d\n",
- max77686->irq, ret);
-
-
- if (debug_mask & MAX77686_DEBUG_IRQ_INFO)
- pr_info("%s-\n", __func__);
-
- return 0;
-}
-
-void max77686_irq_exit(struct max77686_dev *max77686)
-{
- if (max77686->irq)
- free_irq(max77686->irq, max77686);
-}
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index ce869ac..3cb41d0 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -25,6 +25,8 @@
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/mfd/core.h>
@@ -46,6 +48,54 @@ static struct regmap_config max77686_regmap_config = {
.val_bits = 8,
};
+static struct regmap_config max77686_rtc_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static const struct regmap_irq max77686_irqs[] = {
+ /* INT1 interrupts */
+ { .reg_offset = 0, .mask = MAX77686_INT1_PWRONF_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_INT1_PWRONR_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_INT1_JIGONBF_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_INT1_JIGONBR_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_INT1_ACOKBF_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_INT1_ACOKBR_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_INT1_ONKEY1S_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_INT1_MRSTB_MSK, },
+ /* INT2 interrupts */
+ { .reg_offset = 1, .mask = MAX77686_INT2_140C_MSK, },
+ { .reg_offset = 1, .mask = MAX77686_INT2_120C_MSK, },
+};
+
+static const struct regmap_irq_chip max77686_irq_chip = {
+ .name = "max77686-pmic",
+ .status_base = MAX77686_REG_INT1,
+ .mask_base = MAX77686_REG_INT1MSK,
+ .num_regs = 2,
+ .irqs = max77686_irqs,
+ .num_irqs = ARRAY_SIZE(max77686_irqs),
+};
+
+static const struct regmap_irq max77686_rtc_irqs[] = {
+ /* RTC interrupts */
+ { .reg_offset = 0, .mask = MAX77686_RTCINT_RTC60S_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_RTCINT_RTCA1_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_RTCINT_RTCA2_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_RTCINT_SMPL_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_RTCINT_RTC1S_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_RTCINT_WTSR_MSK, },
+};
+
+static const struct regmap_irq_chip max77686_rtc_irq_chip = {
+ .name = "max77686-rtc",
+ .status_base = MAX77686_RTC_INT,
+ .mask_base = MAX77686_RTC_INTM,
+ .num_regs = 1,
+ .irqs = max77686_rtc_irqs,
+ .num_irqs = ARRAY_SIZE(max77686_rtc_irqs),
+};
+
#ifdef CONFIG_OF
static const struct of_device_id max77686_pmic_dt_match[] = {
{.compatible = "maxim,max77686", .data = NULL},
@@ -101,7 +151,6 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
max77686->type = id->driver_data;
max77686->wakeup = pdata->wakeup;
- max77686->irq_gpio = pdata->irq_gpio;
max77686->irq = i2c->irq;
max77686->regmap = devm_regmap_init_i2c(i2c, &max77686_regmap_config);
@@ -117,8 +166,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
dev_err(max77686->dev,
"device not found on this channel (this is not an error)\n");
return -ENODEV;
- } else
- dev_info(max77686->dev, "device found\n");
+ }
max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
if (!max77686->rtc) {
@@ -127,15 +175,48 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
}
i2c_set_clientdata(max77686->rtc, max77686);
- max77686_irq_init(max77686);
+ max77686->rtc_regmap = devm_regmap_init_i2c(max77686->rtc,
+ &max77686_rtc_regmap_config);
+ if (IS_ERR(max77686->rtc_regmap)) {
+ ret = PTR_ERR(max77686->rtc_regmap);
+ dev_err(max77686->dev, "failed to allocate RTC regmap: %d\n",
+ ret);
+ goto err_unregister_i2c;
+ }
+
+ ret = regmap_add_irq_chip(max77686->regmap, max77686->irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
+ IRQF_SHARED, 0, &max77686_irq_chip,
+ &max77686->irq_data);
+ if (ret != 0) {
+ dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
+ goto err_unregister_i2c;
+ }
+ ret = regmap_add_irq_chip(max77686->rtc_regmap, max77686->irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
+ IRQF_SHARED, 0, &max77686_rtc_irq_chip,
+ &max77686->rtc_irq_data);
+ if (ret != 0) {
+ dev_err(&i2c->dev, "failed to add RTC irq chip: %d\n", ret);
+ goto err_del_irqc;
+ }
ret = mfd_add_devices(max77686->dev, -1, max77686_devs,
ARRAY_SIZE(max77686_devs), NULL, 0, NULL);
if (ret < 0) {
- mfd_remove_devices(max77686->dev);
- i2c_unregister_device(max77686->rtc);
+ dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret);
+ goto err_del_rtc_irqc;
}
+ return 0;
+
+err_del_rtc_irqc:
+ regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data);
+err_del_irqc:
+ regmap_del_irq_chip(max77686->irq, max77686->irq_data);
+err_unregister_i2c:
+ i2c_unregister_device(max77686->rtc);
+
return ret;
}
@@ -144,6 +225,10 @@ static int max77686_i2c_remove(struct i2c_client *i2c)
struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
mfd_remove_devices(max77686->dev);
+
+ regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data);
+ regmap_del_irq_chip(max77686->irq, max77686->irq_data);
+
i2c_unregister_device(max77686->rtc);
return 0;
diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 9efe118..d20a7f0 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -492,16 +492,11 @@ static int max77686_rtc_init_reg(struct max77686_rtc_info *info)
return ret;
}
-static struct regmap_config max77686_rtc_regmap_config = {
- .reg_bits = 8,
- .val_bits = 8,
-};
-
static int max77686_rtc_probe(struct platform_device *pdev)
{
struct max77686_dev *max77686 = dev_get_drvdata(pdev->dev.parent);
struct max77686_rtc_info *info;
- int ret, virq;
+ int ret;
dev_info(&pdev->dev, "%s\n", __func__);
@@ -514,14 +509,7 @@ static int max77686_rtc_probe(struct platform_device *pdev)
info->dev = &pdev->dev;
info->max77686 = max77686;
info->rtc = max77686->rtc;
- info->max77686->rtc_regmap = devm_regmap_init_i2c(info->max77686->rtc,
- &max77686_rtc_regmap_config);
- if (IS_ERR(info->max77686->rtc_regmap)) {
- ret = PTR_ERR(info->max77686->rtc_regmap);
- dev_err(info->max77686->dev, "Failed to allocate register map: %d\n",
- ret);
- return ret;
- }
+
platform_set_drvdata(pdev, info);
ret = max77686_rtc_init_reg(info);
@@ -550,15 +538,16 @@ static int max77686_rtc_probe(struct platform_device *pdev)
ret = -EINVAL;
goto err_rtc;
}
- virq = irq_create_mapping(max77686->irq_domain, MAX77686_RTCIRQ_RTCA1);
- if (!virq) {
+
+ info->virq = regmap_irq_get_virq(max77686->rtc_irq_data,
+ MAX77686_RTCIRQ_RTCA1);
+ if (!info->virq) {
ret = -ENXIO;
goto err_rtc;
}
- info->virq = virq;
- ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
- max77686_rtc_alarm_irq, 0, "rtc-alarm0", info);
+ ret = devm_request_threaded_irq(&pdev->dev, info->virq, NULL,
+ max77686_rtc_alarm_irq, 0, "rtc-alarm1", info);
if (ret < 0)
dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
info->virq, ret);
diff --git a/include/linux/mfd/max77686-private.h b/include/linux/mfd/max77686-private.h
index 8c75a9c..8e17780 100644
--- a/include/linux/mfd/max77686-private.h
+++ b/include/linux/mfd/max77686-private.h
@@ -181,9 +181,6 @@ enum max77686_rtc_reg {
MAX77686_ALARM2_DATE = 0x1B,
};
-#define MAX77686_IRQSRC_PMIC (0)
-#define MAX77686_IRQSRC_RTC (1 << 0)
-
enum max77686_irq_source {
PMIC_INT1 = 0,
PMIC_INT2,
@@ -205,16 +202,33 @@ enum max77686_irq {
MAX77686_PMICIRQ_140C,
MAX77686_PMICIRQ_120C,
- MAX77686_RTCIRQ_RTC60S,
+ MAX77686_RTCIRQ_RTC60S = 0,
MAX77686_RTCIRQ_RTCA1,
MAX77686_RTCIRQ_RTCA2,
MAX77686_RTCIRQ_SMPL,
MAX77686_RTCIRQ_RTC1S,
MAX77686_RTCIRQ_WTSR,
-
- MAX77686_IRQ_NR,
};
+#define MAX77686_INT1_PWRONF_MSK BIT(0)
+#define MAX77686_INT1_PWRONR_MSK BIT(1)
+#define MAX77686_INT1_JIGONBF_MSK BIT(2)
+#define MAX77686_INT1_JIGONBR_MSK BIT(3)
+#define MAX77686_INT1_ACOKBF_MSK BIT(4)
+#define MAX77686_INT1_ACOKBR_MSK BIT(5)
+#define MAX77686_INT1_ONKEY1S_MSK BIT(6)
+#define MAX77686_INT1_MRSTB_MSK BIT(7)
+
+#define MAX77686_INT2_140C_MSK BIT(0)
+#define MAX77686_INT2_120C_MSK BIT(1)
+
+#define MAX77686_RTCINT_RTC60S_MSK BIT(0)
+#define MAX77686_RTCINT_RTCA1_MSK BIT(1)
+#define MAX77686_RTCINT_RTCA2_MSK BIT(2)
+#define MAX77686_RTCINT_SMPL_MSK BIT(3)
+#define MAX77686_RTCINT_RTC1S_MSK BIT(4)
+#define MAX77686_RTCINT_WTSR_MSK BIT(5)
+
struct max77686_dev {
struct device *dev;
struct i2c_client *i2c; /* 0xcc / PMIC, Battery Control, and FLASH */
@@ -224,11 +238,10 @@ struct max77686_dev {
struct regmap *regmap; /* regmap for mfd */
struct regmap *rtc_regmap; /* regmap for rtc */
-
- struct irq_domain *irq_domain;
+ struct regmap_irq_chip_data *irq_data;
+ struct regmap_irq_chip_data *rtc_irq_data;
int irq;
- int irq_gpio;
bool wakeup;
struct mutex irqlock;
int irq_masks_cur[MAX77686_IRQ_GROUP_NR];
diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
index 46c0f32..4cbcc13 100644
--- a/include/linux/mfd/max77686.h
+++ b/include/linux/mfd/max77686.h
@@ -89,8 +89,6 @@ struct max77686_opmode_data {
};
struct max77686_platform_data {
- /* IRQ */
- int irq_gpio;
int ono;
int wakeup;
--
2.0.0.rc2
When the CONFIG_OF option was not enabled, a dummy function
max77686_i2c_parse_dt_pdata() was defined since this is called
unconditionally on probe(). Just always define the real function
and conditionally call it if CONFIG_OF is enabled instead.
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
drivers/mfd/max77686.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index a38e9ee..d1f9d04 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -96,7 +96,6 @@ static const struct regmap_irq_chip max77686_rtc_irq_chip = {
.num_irqs = ARRAY_SIZE(max77686_rtc_irqs),
};
-#ifdef CONFIG_OF
static const struct of_device_id max77686_pmic_dt_match[] = {
{.compatible = "maxim,max77686", .data = NULL},
{},
@@ -116,13 +115,6 @@ static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
dev->platform_data = pd;
return pd;
}
-#else
-static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
- *dev)
-{
- return 0;
-}
-#endif
static int max77686_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
@@ -132,7 +124,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
unsigned int data;
int ret = 0;
- if (i2c->dev.of_node)
+ if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node)
pdata = max77686_i2c_parse_dt_pdata(&i2c->dev);
if (!pdata) {
--
2.0.0.rc2
When platform data is not found an -EIO (I/O error) code is returned.
This doesn't seem to be the correct error so better return -EINVAL
(Invalid argument) which is what most drivers do in this case.
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
drivers/mfd/max77686.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index 12d4c17..ada4976 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -129,7 +129,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
if (!pdata) {
dev_err(&i2c->dev, "No platform data found.\n");
- return -EIO;
+ return -EINVAL;
}
max77686 = devm_kzalloc(&i2c->dev,
--
2.0.0.rc2
There is no need to print out-of-memory errors since this is already
done by the memory management subsystem which even calls dump_stack().
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
drivers/mfd/max77686.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index 87fe52e..8650832 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -107,10 +107,8 @@ static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
struct max77686_platform_data *pd;
pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
- if (!pd) {
- dev_err(dev, "could not allocate memory for pdata\n");
+ if (!pd)
return NULL;
- }
dev->platform_data = pd;
return pd;
--
2.0.0.rc2
The MAX77686 RTC chip has two features called SMPL (Sudden Momentary
Power Loss) and WTSR (Watchdog Timeout and Software Resets).
Support for these features seems to be implemented in the driver but
compilation is disabled using a C pre-processor conditional.
This code has been disabled since the driver was original merged in
commit fca1dd03 ("rtc: max77686: add Maxim 77686 driver").
So, since this code has never been built, let's just remove it.
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
drivers/rtc/rtc-max77686.c | 101 ---------------------------------------------
1 file changed, 101 deletions(-)
diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index c1c6055..7bb5433 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -32,15 +32,6 @@
#define RTC_UDR_MASK (1 << RTC_UDR_SHIFT)
#define RTC_RBUDR_SHIFT 4
#define RTC_RBUDR_MASK (1 << RTC_RBUDR_SHIFT)
-/* WTSR and SMPL Register */
-#define WTSRT_SHIFT 0
-#define SMPLT_SHIFT 2
-#define WTSR_EN_SHIFT 6
-#define SMPL_EN_SHIFT 7
-#define WTSRT_MASK (3 << WTSRT_SHIFT)
-#define SMPLT_MASK (3 << SMPLT_SHIFT)
-#define WTSR_EN_MASK (1 << WTSR_EN_SHIFT)
-#define SMPL_EN_MASK (1 << SMPL_EN_SHIFT)
/* RTC Hour register */
#define HOUR_PM_SHIFT 6
#define HOUR_PM_MASK (1 << HOUR_PM_SHIFT)
@@ -49,7 +40,6 @@
#define ALARM_ENABLE_MASK (1 << ALARM_ENABLE_SHIFT)
#define MAX77686_RTC_UPDATE_DELAY 16
-#undef MAX77686_RTC_WTSR_SMPL
enum {
RTC_SEC = 0,
@@ -412,64 +402,6 @@ static const struct rtc_class_ops max77686_rtc_ops = {
.alarm_irq_enable = max77686_rtc_alarm_irq_enable,
};
-#ifdef MAX77686_RTC_WTSR_SMPL
-static void max77686_rtc_enable_wtsr(struct max77686_rtc_info *info, bool enable)
-{
- int ret;
- unsigned int val, mask;
-
- if (enable)
- val = (1 << WTSR_EN_SHIFT) | (3 << WTSRT_SHIFT);
- else
- val = 0;
-
- mask = WTSR_EN_MASK | WTSRT_MASK;
-
- dev_info(info->dev, "%s: %s WTSR\n", __func__,
- enable ? "enable" : "disable");
-
- ret = regmap_update_bits(info->max77686->rtc_regmap,
- MAX77686_WTSR_SMPL_CNTL, mask, val);
- if (ret < 0) {
- dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n",
- __func__, ret);
- return;
- }
-
- max77686_rtc_update(info, MAX77686_RTC_WRITE);
-}
-
-static void max77686_rtc_enable_smpl(struct max77686_rtc_info *info, bool enable)
-{
- int ret;
- unsigned int val, mask;
-
- if (enable)
- val = (1 << SMPL_EN_SHIFT) | (0 << SMPLT_SHIFT);
- else
- val = 0;
-
- mask = SMPL_EN_MASK | SMPLT_MASK;
-
- dev_info(info->dev, "%s: %s SMPL\n", __func__,
- enable ? "enable" : "disable");
-
- ret = regmap_update_bits(info->max77686->rtc_regmap,
- MAX77686_WTSR_SMPL_CNTL, mask, val);
- if (ret < 0) {
- dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n",
- __func__, ret);
- return;
- }
-
- max77686_rtc_update(info, MAX77686_RTC_WRITE);
-
- val = 0;
- regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val);
- dev_info(info->dev, "%s: WTSR_SMPL(0x%02x)\n", __func__, val);
-}
-#endif /* MAX77686_RTC_WTSR_SMPL */
-
static int max77686_rtc_init_reg(struct max77686_rtc_info *info)
{
u8 data[2];
@@ -519,11 +451,6 @@ static int max77686_rtc_probe(struct platform_device *pdev)
goto err_rtc;
}
-#ifdef MAX77686_RTC_WTSR_SMPL
- max77686_rtc_enable_wtsr(info, true);
- max77686_rtc_enable_smpl(info, true);
-#endif
-
device_init_wakeup(&pdev->dev, 1);
info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max77686-rtc",
@@ -556,33 +483,6 @@ err_rtc:
return ret;
}
-static void max77686_rtc_shutdown(struct platform_device *pdev)
-{
-#ifdef MAX77686_RTC_WTSR_SMPL
- struct max77686_rtc_info *info = platform_get_drvdata(pdev);
- int i;
- u8 val = 0;
-
- for (i = 0; i < 3; i++) {
- max77686_rtc_enable_wtsr(info, false);
- regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val);
- dev_info(info->dev, "%s: WTSR_SMPL reg(0x%02x)\n", __func__,
- val);
- if (val & WTSR_EN_MASK) {
- dev_emerg(info->dev, "%s: fail to disable WTSR\n",
- __func__);
- } else {
- dev_info(info->dev, "%s: success to disable WTSR\n",
- __func__);
- break;
- }
- }
-
- /* Disable SMPL when power off */
- max77686_rtc_enable_smpl(info, false);
-#endif /* MAX77686_RTC_WTSR_SMPL */
-}
-
#ifdef CONFIG_PM_SLEEP
static int max77686_rtc_suspend(struct device *dev)
{
@@ -622,7 +522,6 @@ static struct platform_driver max77686_rtc_driver = {
.pm = &max77686_rtc_pm_ops,
},
.probe = max77686_rtc_probe,
- .shutdown = max77686_rtc_shutdown,
.id_table = rtc_id,
};
--
2.0.0.rc2
Maxim Integrated Power Management ICs are very similar with
regard to their clock outputs. Most of the clock drivers for
these chips are duplicating code and are simpler enough that
can be converted to use a generic driver to consolidate code
and avoid duplication.
Signed-off-by: Javier Martinez Canillas <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
--
Changes since v6: None
Changes since v5:
- Fix generic driver changes merged into max77802 clock patch by mistake.
Suggested by Yadwinder Singh Brar.
- Register clock lookups using clk_register_clkdev() instead of doing manually.
- Use the managed devm_clk_register() function and remove clk un-registration.
- Add "clock-output-names" property support. Suggested by Yadwinder Singh Brar.
- Return the rate unconditionally in recalc_rate. Suggested by Mike Turquette.
Changes since v4: None
Changes since v3:
- Don't change clock-names property to make clear that it's
the consumer clock name and should not match the producer clock.
Suggested by Doug Anderson.
---
drivers/clk/Kconfig | 3 +
drivers/clk/Makefile | 1 +
drivers/clk/clk-max-gen.c | 192 ++++++++++++++++++++++++++++++++++++++++++++++
drivers/clk/clk-max-gen.h | 32 ++++++++
4 files changed, 228 insertions(+)
create mode 100644 drivers/clk/clk-max-gen.c
create mode 100644 drivers/clk/clk-max-gen.h
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 9f9c5ae..73f78e8 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -32,6 +32,9 @@ config COMMON_CLK_WM831X
source "drivers/clk/versatile/Kconfig"
+config COMMON_CLK_MAX_GEN
+ bool
+
config COMMON_CLK_MAX77686
tristate "Clock driver for Maxim 77686 MFD"
depends on MFD_MAX77686
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 567f102..6c1aff6 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_ARCH_BCM2835) += clk-bcm2835.o
obj-$(CONFIG_ARCH_EFM32) += clk-efm32gg.o
obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o
obj-$(CONFIG_MACH_LOONGSON1) += clk-ls1x.o
+obj-$(CONFIG_COMMON_CLK_MAX_GEN) += clk-max-gen.o
obj-$(CONFIG_COMMON_CLK_MAX77686) += clk-max77686.o
obj-$(CONFIG_ARCH_MOXART) += clk-moxart.o
obj-$(CONFIG_ARCH_NOMADIK) += clk-nomadik.o
diff --git a/drivers/clk/clk-max-gen.c b/drivers/clk/clk-max-gen.c
new file mode 100644
index 0000000..6505049
--- /dev/null
+++ b/drivers/clk/clk-max-gen.c
@@ -0,0 +1,192 @@
+/*
+ * clk-max-gen.c - Generic clock driver for Maxim PMICs clocks
+ *
+ * Copyright (C) 2014 Google, Inc
+ *
+ * Copyright (C) 2012 Samsung Electornics
+ * Jonghwa Lee <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * This driver is based on clk-max77686.c
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/regmap.h>
+#include <linux/platform_device.h>
+#include <linux/clk-provider.h>
+#include <linux/mutex.h>
+#include <linux/clkdev.h>
+#include <linux/of.h>
+#include <linux/export.h>
+
+struct max_gen_clk {
+ struct regmap *regmap;
+ u32 mask;
+ u32 reg;
+ struct clk_hw hw;
+};
+
+static struct max_gen_clk *to_max_gen_clk(struct clk_hw *hw)
+{
+ return container_of(hw, struct max_gen_clk, hw);
+}
+
+static int max_gen_clk_prepare(struct clk_hw *hw)
+{
+ struct max_gen_clk *max_gen = to_max_gen_clk(hw);
+
+ return regmap_update_bits(max_gen->regmap, max_gen->reg,
+ max_gen->mask, max_gen->mask);
+}
+
+static void max_gen_clk_unprepare(struct clk_hw *hw)
+{
+ struct max_gen_clk *max_gen = to_max_gen_clk(hw);
+
+ regmap_update_bits(max_gen->regmap, max_gen->reg,
+ max_gen->mask, ~max_gen->mask);
+}
+
+static int max_gen_clk_is_prepared(struct clk_hw *hw)
+{
+ struct max_gen_clk *max_gen = to_max_gen_clk(hw);
+ int ret;
+ u32 val;
+
+ ret = regmap_read(max_gen->regmap, max_gen->reg, &val);
+
+ if (ret < 0)
+ return -EINVAL;
+
+ return val & max_gen->mask;
+}
+
+static unsigned long max_gen_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ return 32768;
+}
+
+struct clk_ops max_gen_clk_ops = {
+ .prepare = max_gen_clk_prepare,
+ .unprepare = max_gen_clk_unprepare,
+ .is_prepared = max_gen_clk_is_prepared,
+ .recalc_rate = max_gen_recalc_rate,
+};
+EXPORT_SYMBOL_GPL(max_gen_clk_ops);
+
+static struct clk *max_gen_clk_register(struct device *dev,
+ struct max_gen_clk *max_gen)
+{
+ struct clk *clk;
+ struct clk_hw *hw = &max_gen->hw;
+ int ret;
+
+ clk = devm_clk_register(dev, hw);
+ if (IS_ERR(clk))
+ return clk;
+
+ ret = clk_register_clkdev(clk, hw->init->name, NULL);
+
+ if (ret)
+ return ERR_PTR(ret);
+
+ return clk;
+}
+
+int max_gen_clk_probe(struct platform_device *pdev, struct regmap *regmap,
+ u32 reg, struct clk_init_data *clks_init, int num_init)
+{
+ int i, ret;
+ struct max_gen_clk *max_gen_clks;
+ struct clk **clocks;
+ struct device *dev = pdev->dev.parent;
+ const char *clk_name;
+ struct clk_init_data *init;
+
+ clocks = devm_kzalloc(dev, sizeof(struct clk *) * num_init, GFP_KERNEL);
+ if (!clocks)
+ return -ENOMEM;
+
+ max_gen_clks = devm_kzalloc(dev, sizeof(struct max_gen_clk)
+ * num_init, GFP_KERNEL);
+ if (!max_gen_clks)
+ return -ENOMEM;
+
+ for (i = 0; i < num_init; i++) {
+ max_gen_clks[i].regmap = regmap;
+ max_gen_clks[i].mask = 1 << i;
+ max_gen_clks[i].reg = reg;
+
+ init = devm_kzalloc(dev, sizeof(*init), GFP_KERNEL);
+ if (!init)
+ return -ENOMEM;
+
+ if (dev->of_node &&
+ !of_property_read_string_index(dev->of_node,
+ "clock-output-names",
+ i, &clk_name))
+ init->name = clk_name;
+ else
+ init->name = clks_init[i].name;
+
+ init->ops = clks_init[i].ops;
+ init->flags = clks_init[i].flags;
+
+ max_gen_clks[i].hw.init = init;
+
+ clocks[i] = max_gen_clk_register(dev, &max_gen_clks[i]);
+ if (IS_ERR(clocks[i])) {
+ ret = PTR_ERR(clocks[i]);
+ dev_err(dev, "failed to register %s\n",
+ max_gen_clks[i].hw.init->name);
+ return ret;
+ }
+ }
+
+ platform_set_drvdata(pdev, clocks);
+
+ if (dev->of_node) {
+ struct clk_onecell_data *of_data;
+
+ of_data = devm_kzalloc(dev, sizeof(*of_data), GFP_KERNEL);
+ if (!of_data)
+ return -ENOMEM;
+
+ of_data->clks = clocks;
+ of_data->clk_num = num_init;
+ ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
+ of_data);
+
+ if (ret) {
+ dev_err(dev, "failed to register OF clock provider\n");
+ return ret;
+ }
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(max_gen_clk_probe);
+
+int max_gen_clk_remove(struct platform_device *pdev, int num_init)
+{
+ struct device *dev = pdev->dev.parent;
+
+ if (dev->of_node)
+ of_clk_del_provider(dev->of_node);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(max_gen_clk_remove);
diff --git a/drivers/clk/clk-max-gen.h b/drivers/clk/clk-max-gen.h
new file mode 100644
index 0000000..997e86f
--- /dev/null
+++ b/drivers/clk/clk-max-gen.h
@@ -0,0 +1,32 @@
+/*
+ * clk-max-gen.h - Generic clock driver for Maxim PMICs clocks
+ *
+ * Copyright (C) 2014 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __CLK_MAX_GEN_H__
+#define __CLK_MAX_GEN_H__
+
+#include <linux/types.h>
+#include <linux/device.h>
+#include <linux/clkdev.h>
+#include <linux/regmap.h>
+#include <linux/platform_device.h>
+
+int max_gen_clk_probe(struct platform_device *pdev, struct regmap *regmap,
+ u32 reg, struct clk_init_data *clks_init, int num_init);
+int max_gen_clk_remove(struct platform_device *pdev, int num_init);
+extern struct clk_ops max_gen_clk_ops;
+
+#endif /* __CLK_MAX_GEN_H__ */
--
2.0.0.rc2
Like most clock drivers, the Maxim 77686 PMIC clock binding
follows the convention that the "#clock-cells" property is
used to specify the number of cells in a clock provider.
But the binding document is not clear enough that it shall
be set to 1 since the PMIC support multiple clocks outputs.
Also, explain that the clocks identifiers are defined in a
header file that can be included by Device Tree source with
client nodes to avoid using magic numbers.
Finally, add "clock-output-names" as an optional property
since now is supported by the clock driver.
Signed-off-by: Javier Martinez Canillas <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Doug Anderson <[email protected]>
Reviewed-by: Mike Turquette <[email protected]>
---
Changes since v6: None
Changes since v5:
- Fix generic driver changes merged into max77802 clock patch by mistake.
Suggested by Yadwinder Singh Brar.
- Register clock lookups using clk_register_clkdev() instead of doing manually.
- Use the managed devm_clk_register() function and remove clk un-registration.
- Add "clock-output-names" property support. Suggested by Yadwinder Singh Brar.
- Return the rate unconditionally in recalc_rate. Suggested by Mike Turquette.
Changes since v4: None
Changes since v3:
- Don't change clock-names property to make clear that it's
the consumer clock name and should not match the producer clock.
Suggested by Doug Anderson.
---
.../devicetree/bindings/clock/maxim,max77686.txt | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/Documentation/devicetree/bindings/clock/maxim,max77686.txt b/Documentation/devicetree/bindings/clock/maxim,max77686.txt
index 96ce71b..9c40739 100644
--- a/Documentation/devicetree/bindings/clock/maxim,max77686.txt
+++ b/Documentation/devicetree/bindings/clock/maxim,max77686.txt
@@ -9,13 +9,21 @@ The MAX77686 contains three 32.768khz clock outputs that can be controlled
Following properties should be presend in main device node of the MFD chip.
Required properties:
-- #clock-cells: simple one-cell clock specifier format is used, where the
- only cell is used as an index of the clock inside the provider. Following
- indices are allowed:
+
+- #clock-cells: from common clock binding; shall be set to 1.
+
+Optional properties:
+- clock-output-names: From common clock binding.
+
+Each clock is assigned an identifier and client nodes can use this identifier
+to specify the clock which they consume. Following indices are allowed:
- 0: 32khz_ap clock,
- 1: 32khz_cp clock,
- 2: 32khz_pmic clock.
+Clocks are defined as preprocessor macros in dt-bindings/clock/maxim,max77686.h
+header and can be used in device tree sources.
+
Example: Node of the MFD chip
max77686: max77686@09 {
@@ -34,5 +42,5 @@ Example: Clock consumer node
compatible = "bar,foo";
/* ... */
clock-names = "my-clock";
- clocks = <&max77686 2>;
+ clocks = <&max77686 MAX77686_CLK_PMIC>;
};
--
2.0.0.rc2
The MAX77686 PMIC submodule has Dynamic Voltage Scaling (DVS)
support on some regulators. Now that the regulator driver has
bindings to configure it, these bindings have to be documented.
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
Documentation/devicetree/bindings/mfd/max77686.txt | 34 ++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/Documentation/devicetree/bindings/mfd/max77686.txt b/Documentation/devicetree/bindings/mfd/max77686.txt
index 678f3cf..daf1c07 100644
--- a/Documentation/devicetree/bindings/mfd/max77686.txt
+++ b/Documentation/devicetree/bindings/mfd/max77686.txt
@@ -10,12 +10,38 @@ PMIC submodule.
Binding for the built-in 32k clock generator block is defined separately
in bindings/clk/maxim,max77686.txt file.
+Buck regulators 2, 3 and 4 include Dynamic Voltage Scaling (DVS) that allows
+each output voltage to change dynamically. Each Buck output voltage is selected
+using a set of external inputs: DVS1-3 and SELB2, 3 and 4.
+
+There are 8 DVS registers that can be used to configure the output voltage
+for each Buck regulator and which one is active is controled by DVSx lines.
+
+SELBx lines are used to control if individual Buck lines are ON or OFF.
+
Required properties:
- compatible : Must be "maxim,max77686";
- reg : Specifies the i2c slave address of PMIC block.
- interrupts : This i2c device has an IRQ line connected to the main SoC.
- interrupt-parent : The parent interrupt controller.
+Optional properties:
+- max77686,pmic-buck-default-dvs-idx: We'll always write this DVS index in the
+ PMIC for Bucks with DVS.
+ NOTE: at the moment these bindings don't include enough details for actual
+ GPIO-DVS--this just lets you choose which single slot to use.
+
+- max77686,pmic-buck-dvs-gpios: A GPIO array where each GPIO is connected to a
+ DVS line. We'll try to set these GPIOs to match pmic-buck-default-dvs-idx at
+ probe time if they are defined. If some or all of these GPIOs are not defined
+ it's assumed that the board has any missing GPIOs hardwired to match
+ pmic-buck-default-dvs-idx.
+
+- max77686,pmic-buck-selb-gpios: A GPIO array where each GPIO is connected to a
+ SELBx line. Should be three values: 2, 3 and 4. It is strongly suggested to
+ include these GPIOs if there's any chance that changing DVS GPIOs one line at
+ a time might glitch your DVS values.
+
Optional node:
- voltage-regulators : The regulators of max77686 have to be instantiated
under subnode named "voltage-regulators" using the following format.
@@ -42,6 +68,14 @@ Example:
interrupts = <26 0>;
reg = <0x09>;
+ max77686,pmic-buck-default-dvs-idx = <1>;
+ max77686,pmic-buck-dvs-gpios = <&gpy7 6 0>,
+ <&gpj4 2 0>,
+ <&gpj4 3 0>;
+ max77686,pmic-buck-selb-gpios = <&gph0 1 0>,
+ <&gph0 2 0>,
+ <&gph0 3 0>,
+
voltage-regulators {
ldo11_reg {
regulator-compatible = "LDO11";
--
2.0.0.rc2
Maxim MAX77802 is a power management chip that contains 10 high
efficiency Buck regulators, 32 Low-dropout (LDO) regulators used
to power up application processors and peripherals, a 2-channel
32kHz clock outputs, a Real-Time-Clock (RTC) and a I2C interface
to program the individual regulators, clocks outputs and the RTC.
This patch adds support for MAX77802 to the MAX77686 driver and is
based on a driver added to the Chrome OS kernel 3.8 by Simon Glass.
Signed-off-by: Javier Martinez Canillas <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
---
Changes since v6:
- Fix comments grammar. Suggested by Krzysztof Kozlowski.
- Only unregister the RTC i2c device if the type is MAX77686.
Suggested by Krzysztof Kozlowski.
Changes since v5:
- Extend the 77686 driver to support 77802 instead of adding a new driver.
Suggested by Lee Jones.
Changes since v4:
- Use consistent expressions when checking for NULL values.
Suggested by Krzysztof Kozlowski.
- Remove unused defines. Suggested by Krzysztof Kozlowski.
- Explain why IRQ is disabled on suspend. Suggested by Krzysztof Kozlowski.
Changes since v3:
- Remove unnecessary OOM error message since the mm subsystem already logs it.
Changes since v2:
- Split the DT binding docs in a separate patch and improve the documentation.
Suggested by Mark Brown.
- Add all the devices in the MFD driver instead of doing in separate patches.
Suggested by Mark Brown.
Changes since v1:
- Convert max77{686,802} to regmap irq API and get rid of max77{686,802}-irq.c
Suggested by Krzysztof Kozlowski.
- Don't protect max77802 mfd_cells using Kconfig options since mfd core omits
devices that don't match. Suggested by Lee Jones.
- Change mfd driver to be tristate instead of boolean. Suggested by Mark Brown.
- Change binding "voltage-regulators" property to "regulators" to be consistent
with other PMIC drivers. Suggested by Mark Brown.
- Use regulators node names instead of the deprecated "regulator-compatible"
property. Suggested by Mark Brown.
- Use the new descriptor-based GPIO interface instead of the deprecated
---
drivers/mfd/Kconfig | 6 +-
drivers/mfd/max77686.c | 190 +++++++++++++++++++++++++++-----
include/linux/mfd/max77686-private.h | 208 ++++++++++++++++++++++++++++++++++-
include/linux/mfd/max77686.h | 60 +++++++++-
4 files changed, 430 insertions(+), 34 deletions(-)
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 3010204..de5abf2 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -380,15 +380,15 @@ config MFD_MAX14577
of the device.
config MFD_MAX77686
- bool "Maxim Semiconductor MAX77686 PMIC Support"
+ bool "Maxim Semiconductor MAX77686/802 PMIC Support"
depends on I2C=y
select MFD_CORE
select REGMAP_I2C
select REGMAP_IRQ
select IRQ_DOMAIN
help
- Say yes here to add support for Maxim Semiconductor MAX77686.
- This is a Power Management IC with RTC on chip.
+ Say yes here to add support for Maxim Semiconductor MAX77686 and
+ MAX77802 which are Power Management IC with an RTC on chip.
This driver provides common support for accessing the device;
additional drivers must be enabled in order to use the functionality
of the device.
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index d193873..17d5cb3 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -1,5 +1,5 @@
/*
- * max77686.c - mfd core driver for the Maxim 77686
+ * max77686.c - mfd core driver for the Maxim 77686/802
*
* Copyright (C) 2012 Samsung Electronics
* Chiwoong Byun <[email protected]>
@@ -45,6 +45,74 @@ static const struct mfd_cell max77686_devs[] = {
{ .name = "max77686-clk", },
};
+static const struct mfd_cell max77802_devs[] = {
+ { .name = "max77802-pmic", },
+ { .name = "max77802-clk", },
+ { .name = "max77802-rtc", },
+};
+
+static bool max77802_pmic_is_accessible_reg(struct device *dev,
+ unsigned int reg)
+{
+ return (reg >= MAX77802_REG_DEVICE_ID && reg < MAX77802_REG_PMIC_END);
+}
+
+static bool max77802_rtc_is_accessible_reg(struct device *dev,
+ unsigned int reg)
+{
+ return (reg >= MAX77802_RTC_INT && reg < MAX77802_RTC_END);
+}
+
+static bool max77802_is_accessible_reg(struct device *dev, unsigned int reg)
+{
+ return (max77802_pmic_is_accessible_reg(dev, reg) ||
+ max77802_rtc_is_accessible_reg(dev, reg));
+}
+
+static bool max77802_pmic_is_precious_reg(struct device *dev, unsigned int reg)
+{
+ return (reg == MAX77802_REG_INTSRC || reg == MAX77802_REG_INT1 ||
+ reg == MAX77802_REG_INT2);
+}
+
+static bool max77802_rtc_is_precious_reg(struct device *dev, unsigned int reg)
+{
+ return (reg == MAX77802_RTC_INT ||
+ reg == MAX77802_RTC_UPDATE0 ||
+ reg == MAX77802_RTC_UPDATE1);
+}
+
+static bool max77802_is_precious_reg(struct device *dev, unsigned int reg)
+{
+ return (max77802_pmic_is_precious_reg(dev, reg) ||
+ max77802_rtc_is_precious_reg(dev, reg));
+}
+
+static bool max77802_pmic_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ return (max77802_is_precious_reg(dev, reg) ||
+ reg == MAX77802_REG_STATUS1 || reg == MAX77802_REG_STATUS2 ||
+ reg == MAX77802_REG_PWRON);
+}
+
+static bool max77802_rtc_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ return (max77802_rtc_is_precious_reg(dev, reg) ||
+ reg == MAX77802_RTC_SEC ||
+ reg == MAX77802_RTC_MIN ||
+ reg == MAX77802_RTC_HOUR ||
+ reg == MAX77802_RTC_WEEKDAY ||
+ reg == MAX77802_RTC_MONTH ||
+ reg == MAX77802_RTC_YEAR ||
+ reg == MAX77802_RTC_DATE);
+}
+
+static bool max77802_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ return (max77802_pmic_is_volatile_reg(dev, reg) ||
+ max77802_rtc_is_volatile_reg(dev, reg));
+}
+
static struct regmap_config max77686_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
@@ -55,6 +123,17 @@ static struct regmap_config max77686_rtc_regmap_config = {
.val_bits = 8,
};
+static struct regmap_config max77802_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .writeable_reg = max77802_is_accessible_reg,
+ .readable_reg = max77802_is_accessible_reg,
+ .precious_reg = max77802_is_precious_reg,
+ .volatile_reg = max77802_is_volatile_reg,
+ .name = "max77802-pmic",
+ .cache_type = REGCACHE_RBTREE,
+};
+
static const struct regmap_irq max77686_irqs[] = {
/* INT1 interrupts */
{ .reg_offset = 0, .mask = MAX77686_INT1_PWRONF_MSK, },
@@ -98,9 +177,34 @@ static const struct regmap_irq_chip max77686_rtc_irq_chip = {
.num_irqs = ARRAY_SIZE(max77686_rtc_irqs),
};
+static const struct regmap_irq_chip max77802_irq_chip = {
+ .name = "max77802-pmic",
+ .status_base = MAX77802_REG_INT1,
+ .mask_base = MAX77802_REG_INT1MSK,
+ .num_regs = 2,
+ .irqs = max77686_irqs, /* same masks as 77686 */
+ .num_irqs = ARRAY_SIZE(max77686_irqs),
+};
+
+static const struct regmap_irq_chip max77802_rtc_irq_chip = {
+ .name = "max77802-rtc",
+ .status_base = MAX77802_RTC_INT,
+ .mask_base = MAX77802_RTC_INTM,
+ .num_regs = 1,
+ .irqs = max77686_rtc_irqs, /* same masks as 77686 */
+ .num_irqs = ARRAY_SIZE(max77686_rtc_irqs),
+};
+
static const struct of_device_id max77686_pmic_dt_match[] = {
- {.compatible = "maxim,max77686", .data = NULL},
- {},
+ {
+ .compatible = "maxim,max77686",
+ .data = (void *)TYPE_MAX77686,
+ },
+ {
+ .compatible = "maxim,max77802",
+ .data = (void *)TYPE_MAX77802,
+ },
+ { },
};
static void max77686_dt_parse_dvs_gpio(struct device *dev)
@@ -240,6 +344,12 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
struct max77686_platform_data *pdata = dev_get_platdata(&i2c->dev);
unsigned int data;
int ret = 0;
+ const struct regmap_config *config;
+ const struct regmap_irq_chip *irq_chip;
+ const struct regmap_irq_chip *rtc_irq_chip;
+ struct regmap **rtc_regmap;
+ const struct mfd_cell *cells;
+ int n_devs;
if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node && !pdata)
pdata = max77686_i2c_parse_dt_pdata(&i2c->dev);
@@ -262,56 +372,77 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
max77686->wakeup = pdata->wakeup;
max77686->irq = i2c->irq;
- max77686->regmap = devm_regmap_init_i2c(i2c, &max77686_regmap_config);
+ if (max77686->type == TYPE_MAX77686) {
+ config = &max77686_regmap_config;
+ irq_chip = &max77686_irq_chip;
+ rtc_irq_chip = &max77686_rtc_irq_chip;
+ rtc_regmap = &max77686->rtc_regmap;
+ cells = max77686_devs;
+ n_devs = ARRAY_SIZE(max77686_devs);
+ } else {
+ config = &max77802_regmap_config;
+ irq_chip = &max77802_irq_chip;
+ rtc_irq_chip = &max77802_rtc_irq_chip;
+ rtc_regmap = &max77686->regmap;
+ cells = max77802_devs;
+ n_devs = ARRAY_SIZE(max77802_devs);
+ }
+
+ max77686->regmap = devm_regmap_init_i2c(i2c, config);
if (IS_ERR(max77686->regmap)) {
ret = PTR_ERR(max77686->regmap);
dev_err(max77686->dev, "Failed to allocate register map: %d\n",
- ret);
+ ret);
return ret;
}
ret = regmap_read(max77686->regmap, MAX77686_REG_DEVICE_ID, &data);
if (ret < 0) {
dev_err(max77686->dev,
- "device not found on this channel (this is not an error)\n");
- return -ENODEV;
- }
-
- max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
- if (!max77686->rtc) {
- dev_err(max77686->dev, "Failed to allocate I2C device for RTC\n");
+ "device not found on this channel\n");
return -ENODEV;
}
- i2c_set_clientdata(max77686->rtc, max77686);
- max77686->rtc_regmap = devm_regmap_init_i2c(max77686->rtc,
- &max77686_rtc_regmap_config);
- if (IS_ERR(max77686->rtc_regmap)) {
- ret = PTR_ERR(max77686->rtc_regmap);
- dev_err(max77686->dev, "failed to allocate RTC regmap: %d\n",
- ret);
- goto err_unregister_i2c;
+ if (max77686->type == TYPE_MAX77686) {
+ max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
+ if (!max77686->rtc) {
+ dev_err(max77686->dev,
+ "Failed to allocate I2C device for RTC\n");
+ return -ENODEV;
+ }
+ i2c_set_clientdata(max77686->rtc, max77686);
+
+ max77686->rtc_regmap =
+ devm_regmap_init_i2c(max77686->rtc,
+ &max77686_rtc_regmap_config);
+ if (IS_ERR(max77686->rtc_regmap)) {
+ ret = PTR_ERR(max77686->rtc_regmap);
+ dev_err(max77686->dev,
+ "failed to allocate RTC regmap: %d\n",
+ ret);
+ goto err_unregister_i2c;
+ }
}
ret = regmap_add_irq_chip(max77686->regmap, max77686->irq,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
- IRQF_SHARED, 0, &max77686_irq_chip,
+ IRQF_SHARED, 0, irq_chip,
&max77686->irq_data);
if (ret) {
dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
goto err_unregister_i2c;
}
- ret = regmap_add_irq_chip(max77686->rtc_regmap, max77686->irq,
+
+ ret = regmap_add_irq_chip(*rtc_regmap, max77686->irq,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
- IRQF_SHARED, 0, &max77686_rtc_irq_chip,
+ IRQF_SHARED, 0, rtc_irq_chip,
&max77686->rtc_irq_data);
if (ret) {
dev_err(&i2c->dev, "failed to add RTC irq chip: %d\n", ret);
goto err_del_irqc;
}
- ret = mfd_add_devices(max77686->dev, -1, max77686_devs,
- ARRAY_SIZE(max77686_devs), NULL, 0, NULL);
+ ret = mfd_add_devices(max77686->dev, -1, cells, n_devs, NULL, 0, NULL);
if (ret < 0) {
dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret);
goto err_del_rtc_irqc;
@@ -324,7 +455,8 @@ err_del_rtc_irqc:
err_del_irqc:
regmap_del_irq_chip(max77686->irq, max77686->irq_data);
err_unregister_i2c:
- i2c_unregister_device(max77686->rtc);
+ if (max77686->type == TYPE_MAX77686)
+ i2c_unregister_device(max77686->rtc);
return ret;
}
@@ -338,13 +470,15 @@ static int max77686_i2c_remove(struct i2c_client *i2c)
regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data);
regmap_del_irq_chip(max77686->irq, max77686->irq_data);
- i2c_unregister_device(max77686->rtc);
+ if (max77686->type == TYPE_MAX77686)
+ i2c_unregister_device(max77686->rtc);
return 0;
}
static const struct i2c_device_id max77686_i2c_id[] = {
{ "max77686", TYPE_MAX77686 },
+ { "max77802", TYPE_MAX77802 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);
@@ -413,6 +547,6 @@ static void __exit max77686_i2c_exit(void)
}
module_exit(max77686_i2c_exit);
-MODULE_DESCRIPTION("MAXIM 77686 multi-function core driver");
+MODULE_DESCRIPTION("MAXIM 77686/802 multi-function core driver");
MODULE_AUTHOR("Chiwoong Byun <[email protected]>");
MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/max77686-private.h b/include/linux/mfd/max77686-private.h
index 8e17780..0d60b38 100644
--- a/include/linux/mfd/max77686-private.h
+++ b/include/linux/mfd/max77686-private.h
@@ -1,5 +1,5 @@
/*
- * max77686-private.h - Voltage regulator driver for the Maxim 77686
+ * max77686-private.h - Voltage regulator driver for the Maxim 77686/802
*
* Copyright (C) 2012 Samsung Electrnoics
* Chiwoong Byun <[email protected]>
@@ -28,6 +28,7 @@
#define MAX77686_REG_INVALID (0xff)
+/* MAX77686 PMIC registers */
enum max77686_pmic_reg {
MAX77686_REG_DEVICE_ID = 0x00,
MAX77686_REG_INTSRC = 0x01,
@@ -181,6 +182,210 @@ enum max77686_rtc_reg {
MAX77686_ALARM2_DATE = 0x1B,
};
+/* MAX77802 PMIC registers */
+enum max77802_pmic_reg {
+ MAX77802_REG_DEVICE_ID = 0x00,
+ MAX77802_REG_INTSRC = 0x01,
+ MAX77802_REG_INT1 = 0x02,
+ MAX77802_REG_INT2 = 0x03,
+
+ MAX77802_REG_INT1MSK = 0x04,
+ MAX77802_REG_INT2MSK = 0x05,
+
+ MAX77802_REG_STATUS1 = 0x06,
+ MAX77802_REG_STATUS2 = 0x07,
+
+ MAX77802_REG_PWRON = 0x08,
+ /* Reserved: 0x09 */
+ MAX77802_REG_MRSTB = 0x0A,
+ MAX77802_REG_EPWRHOLD = 0x0B,
+ /* Reserved: 0x0C-0x0D */
+ MAX77802_REG_BOOSTCTRL = 0x0E,
+ MAX77802_REG_BOOSTOUT = 0x0F,
+
+ MAX77802_REG_BUCK1CTRL = 0x10,
+ MAX77802_REG_BUCK1DVS1 = 0x11,
+ MAX77802_REG_BUCK1DVS2 = 0x12,
+ MAX77802_REG_BUCK1DVS3 = 0x13,
+ MAX77802_REG_BUCK1DVS4 = 0x14,
+ MAX77802_REG_BUCK1DVS5 = 0x15,
+ MAX77802_REG_BUCK1DVS6 = 0x16,
+ MAX77802_REG_BUCK1DVS7 = 0x17,
+ MAX77802_REG_BUCK1DVS8 = 0x18,
+ /* Reserved: 0x19 */
+ MAX77802_REG_BUCK2CTRL1 = 0x1A,
+ MAX77802_REG_BUCK2CTRL2 = 0x1B,
+ MAX77802_REG_BUCK2PHTRAN = 0x1C,
+ MAX77802_REG_BUCK2DVS1 = 0x1D,
+ MAX77802_REG_BUCK2DVS2 = 0x1E,
+ MAX77802_REG_BUCK2DVS3 = 0x1F,
+ MAX77802_REG_BUCK2DVS4 = 0x20,
+ MAX77802_REG_BUCK2DVS5 = 0x21,
+ MAX77802_REG_BUCK2DVS6 = 0x22,
+ MAX77802_REG_BUCK2DVS7 = 0x23,
+ MAX77802_REG_BUCK2DVS8 = 0x24,
+ /* Reserved: 0x25-0x26 */
+ MAX77802_REG_BUCK3CTRL1 = 0x27,
+ MAX77802_REG_BUCK3DVS1 = 0x28,
+ MAX77802_REG_BUCK3DVS2 = 0x29,
+ MAX77802_REG_BUCK3DVS3 = 0x2A,
+ MAX77802_REG_BUCK3DVS4 = 0x2B,
+ MAX77802_REG_BUCK3DVS5 = 0x2C,
+ MAX77802_REG_BUCK3DVS6 = 0x2D,
+ MAX77802_REG_BUCK3DVS7 = 0x2E,
+ MAX77802_REG_BUCK3DVS8 = 0x2F,
+ /* Reserved: 0x30-0x36 */
+ MAX77802_REG_BUCK4CTRL1 = 0x37,
+ MAX77802_REG_BUCK4DVS1 = 0x38,
+ MAX77802_REG_BUCK4DVS2 = 0x39,
+ MAX77802_REG_BUCK4DVS3 = 0x3A,
+ MAX77802_REG_BUCK4DVS4 = 0x3B,
+ MAX77802_REG_BUCK4DVS5 = 0x3C,
+ MAX77802_REG_BUCK4DVS6 = 0x3D,
+ MAX77802_REG_BUCK4DVS7 = 0x3E,
+ MAX77802_REG_BUCK4DVS8 = 0x3F,
+ /* Reserved: 0x40 */
+ MAX77802_REG_BUCK5CTRL = 0x41,
+ MAX77802_REG_BUCK5OUT = 0x42,
+ /* Reserved: 0x43 */
+ MAX77802_REG_BUCK6CTRL = 0x44,
+ MAX77802_REG_BUCK6DVS1 = 0x45,
+ MAX77802_REG_BUCK6DVS2 = 0x46,
+ MAX77802_REG_BUCK6DVS3 = 0x47,
+ MAX77802_REG_BUCK6DVS4 = 0x48,
+ MAX77802_REG_BUCK6DVS5 = 0x49,
+ MAX77802_REG_BUCK6DVS6 = 0x4A,
+ MAX77802_REG_BUCK6DVS7 = 0x4B,
+ MAX77802_REG_BUCK6DVS8 = 0x4C,
+ /* Reserved: 0x4D */
+ MAX77802_REG_BUCK7CTRL = 0x4E,
+ MAX77802_REG_BUCK7OUT = 0x4F,
+ /* Reserved: 0x50 */
+ MAX77802_REG_BUCK8CTRL = 0x51,
+ MAX77802_REG_BUCK8OUT = 0x52,
+ /* Reserved: 0x53 */
+ MAX77802_REG_BUCK9CTRL = 0x54,
+ MAX77802_REG_BUCK9OUT = 0x55,
+ /* Reserved: 0x56 */
+ MAX77802_REG_BUCK10CTRL = 0x57,
+ MAX77802_REG_BUCK10OUT = 0x58,
+
+ /* Reserved: 0x59-0x5F */
+
+ MAX77802_REG_LDO1CTRL1 = 0x60,
+ MAX77802_REG_LDO2CTRL1 = 0x61,
+ MAX77802_REG_LDO3CTRL1 = 0x62,
+ MAX77802_REG_LDO4CTRL1 = 0x63,
+ MAX77802_REG_LDO5CTRL1 = 0x64,
+ MAX77802_REG_LDO6CTRL1 = 0x65,
+ MAX77802_REG_LDO7CTRL1 = 0x66,
+ MAX77802_REG_LDO8CTRL1 = 0x67,
+ MAX77802_REG_LDO9CTRL1 = 0x68,
+ MAX77802_REG_LDO10CTRL1 = 0x69,
+ MAX77802_REG_LDO11CTRL1 = 0x6A,
+ MAX77802_REG_LDO12CTRL1 = 0x6B,
+ MAX77802_REG_LDO13CTRL1 = 0x6C,
+ MAX77802_REG_LDO14CTRL1 = 0x6D,
+ MAX77802_REG_LDO15CTRL1 = 0x6E,
+ /* Reserved: 0x6F */
+ MAX77802_REG_LDO17CTRL1 = 0x70,
+ MAX77802_REG_LDO18CTRL1 = 0x71,
+ MAX77802_REG_LDO19CTRL1 = 0x72,
+ MAX77802_REG_LDO20CTRL1 = 0x73,
+ MAX77802_REG_LDO21CTRL1 = 0x74,
+ MAX77802_REG_LDO22CTRL1 = 0x75,
+ MAX77802_REG_LDO23CTRL1 = 0x76,
+ MAX77802_REG_LDO24CTRL1 = 0x77,
+ MAX77802_REG_LDO25CTRL1 = 0x78,
+ MAX77802_REG_LDO26CTRL1 = 0x79,
+ MAX77802_REG_LDO27CTRL1 = 0x7A,
+ MAX77802_REG_LDO28CTRL1 = 0x7B,
+ MAX77802_REG_LDO29CTRL1 = 0x7C,
+ MAX77802_REG_LDO30CTRL1 = 0x7D,
+ /* Reserved: 0x7E */
+ MAX77802_REG_LDO32CTRL1 = 0x7F,
+ MAX77802_REG_LDO33CTRL1 = 0x80,
+ MAX77802_REG_LDO34CTRL1 = 0x81,
+ MAX77802_REG_LDO35CTRL1 = 0x82,
+ /* Reserved: 0x83-0x8F */
+ MAX77802_REG_LDO1CTRL2 = 0x90,
+ MAX77802_REG_LDO2CTRL2 = 0x91,
+ MAX77802_REG_LDO3CTRL2 = 0x92,
+ MAX77802_REG_LDO4CTRL2 = 0x93,
+ MAX77802_REG_LDO5CTRL2 = 0x94,
+ MAX77802_REG_LDO6CTRL2 = 0x95,
+ MAX77802_REG_LDO7CTRL2 = 0x96,
+ MAX77802_REG_LDO8CTRL2 = 0x97,
+ MAX77802_REG_LDO9CTRL2 = 0x98,
+ MAX77802_REG_LDO10CTRL2 = 0x99,
+ MAX77802_REG_LDO11CTRL2 = 0x9A,
+ MAX77802_REG_LDO12CTRL2 = 0x9B,
+ MAX77802_REG_LDO13CTRL2 = 0x9C,
+ MAX77802_REG_LDO14CTRL2 = 0x9D,
+ MAX77802_REG_LDO15CTRL2 = 0x9E,
+ /* Reserved: 0x9F */
+ MAX77802_REG_LDO17CTRL2 = 0xA0,
+ MAX77802_REG_LDO18CTRL2 = 0xA1,
+ MAX77802_REG_LDO19CTRL2 = 0xA2,
+ MAX77802_REG_LDO20CTRL2 = 0xA3,
+ MAX77802_REG_LDO21CTRL2 = 0xA4,
+ MAX77802_REG_LDO22CTRL2 = 0xA5,
+ MAX77802_REG_LDO23CTRL2 = 0xA6,
+ MAX77802_REG_LDO24CTRL2 = 0xA7,
+ MAX77802_REG_LDO25CTRL2 = 0xA8,
+ MAX77802_REG_LDO26CTRL2 = 0xA9,
+ MAX77802_REG_LDO27CTRL2 = 0xAA,
+ MAX77802_REG_LDO28CTRL2 = 0xAB,
+ MAX77802_REG_LDO29CTRL2 = 0xAC,
+ MAX77802_REG_LDO30CTRL2 = 0xAD,
+ /* Reserved: 0xAE */
+ MAX77802_REG_LDO32CTRL2 = 0xAF,
+ MAX77802_REG_LDO33CTRL2 = 0xB0,
+ MAX77802_REG_LDO34CTRL2 = 0xB1,
+ MAX77802_REG_LDO35CTRL2 = 0xB2,
+ /* Reserved: 0xB3 */
+
+ MAX77802_REG_BBAT_CHG = 0xB4,
+ MAX77802_REG_32KHZ = 0xB5,
+
+ MAX77802_REG_PMIC_END = 0xB6,
+};
+
+enum max77802_rtc_reg {
+ MAX77802_RTC_INT = 0xC0,
+ MAX77802_RTC_INTM = 0xC1,
+ MAX77802_RTC_CONTROLM = 0xC2,
+ MAX77802_RTC_CONTROL = 0xC3,
+ MAX77802_RTC_UPDATE0 = 0xC4,
+ MAX77802_RTC_UPDATE1 = 0xC5,
+ MAX77802_WTSR_SMPL_CNTL = 0xC6,
+ MAX77802_RTC_SEC = 0xC7,
+ MAX77802_RTC_MIN = 0xC8,
+ MAX77802_RTC_HOUR = 0xC9,
+ MAX77802_RTC_WEEKDAY = 0xCA,
+ MAX77802_RTC_MONTH = 0xCB,
+ MAX77802_RTC_YEAR = 0xCC,
+ MAX77802_RTC_DATE = 0xCD,
+ MAX77802_RTC_AE1 = 0xCE,
+ MAX77802_ALARM1_SEC = 0xCF,
+ MAX77802_ALARM1_MIN = 0xD0,
+ MAX77802_ALARM1_HOUR = 0xD1,
+ MAX77802_ALARM1_WEEKDAY = 0xD2,
+ MAX77802_ALARM1_MONTH = 0xD3,
+ MAX77802_ALARM1_YEAR = 0xD4,
+ MAX77802_ALARM1_DATE = 0xD5,
+ MAX77802_RTC_AE2 = 0xD6,
+ MAX77802_ALARM2_SEC = 0xD7,
+ MAX77802_ALARM2_MIN = 0xD8,
+ MAX77802_ALARM2_HOUR = 0xD9,
+ MAX77802_ALARM2_WEEKDAY = 0xDA,
+ MAX77802_ALARM2_MONTH = 0xDB,
+ MAX77802_ALARM2_YEAR = 0xDC,
+ MAX77802_ALARM2_DATE = 0xDD,
+
+ MAX77802_RTC_END = 0xDF,
+};
+
enum max77686_irq_source {
PMIC_INT1 = 0,
PMIC_INT2,
@@ -250,6 +455,7 @@ struct max77686_dev {
enum max77686_types {
TYPE_MAX77686,
+ TYPE_MAX77802,
};
extern int max77686_irq_init(struct max77686_dev *max77686);
diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
index 46a736b..ff021b8 100644
--- a/include/linux/mfd/max77686.h
+++ b/include/linux/mfd/max77686.h
@@ -1,5 +1,5 @@
/*
- * max77686.h - Driver for the Maxim 77686
+ * max77686.h - Driver for the Maxim 77686/802
*
* Copyright (C) 2012 Samsung Electrnoics
* Chiwoong Byun <[email protected]>
@@ -71,6 +71,54 @@ enum max77686_regulators {
MAX77686_REG_MAX,
};
+/* MAX77802 regulator IDs */
+enum max77802_regulators {
+ MAX77802_BUCK1 = 0,
+ MAX77802_BUCK2,
+ MAX77802_BUCK3,
+ MAX77802_BUCK4,
+ MAX77802_BUCK5,
+ MAX77802_BUCK6,
+ MAX77802_BUCK7,
+ MAX77802_BUCK8,
+ MAX77802_BUCK9,
+ MAX77802_BUCK10,
+ MAX77802_LDO1,
+ MAX77802_LDO2,
+ MAX77802_LDO3,
+ MAX77802_LDO4,
+ MAX77802_LDO5,
+ MAX77802_LDO6,
+ MAX77802_LDO7,
+ MAX77802_LDO8,
+ MAX77802_LDO9,
+ MAX77802_LDO10,
+ MAX77802_LDO11,
+ MAX77802_LDO12,
+ MAX77802_LDO13,
+ MAX77802_LDO14,
+ MAX77802_LDO15,
+ MAX77802_LDO17,
+ MAX77802_LDO18,
+ MAX77802_LDO19,
+ MAX77802_LDO20,
+ MAX77802_LDO21,
+ MAX77802_LDO23,
+ MAX77802_LDO24,
+ MAX77802_LDO25,
+ MAX77802_LDO26,
+ MAX77802_LDO27,
+ MAX77802_LDO28,
+ MAX77802_LDO29,
+ MAX77802_LDO30,
+ MAX77802_LDO32,
+ MAX77802_LDO33,
+ MAX77802_LDO34,
+ MAX77802_LDO35,
+
+ MAX77802_REG_MAX,
+};
+
struct max77686_regulator_data {
int id;
struct regulator_init_data *initdata;
@@ -83,6 +131,13 @@ enum max77686_opmode {
MAX77686_OPMODE_STANDBY,
};
+enum max77802_opmode {
+ MAX77802_OPMODE_OFF,
+ MAX77802_OPMODE_STANDBY,
+ MAX77802_OPMODE_LP,
+ MAX77802_OPMODE_NORMAL,
+};
+
struct max77686_opmode_data {
int id;
int mode;
@@ -106,7 +161,8 @@ struct max77686_platform_data {
struct gpio_desc *buck_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
int buck_default_idx; /* Default value of DVS1, 2, 3 */
- struct gpio_desc *buck_gpio_selb[3]; /* Buck regulators 2, 3, 4 */
+ /* GPIO-SELBx - MAX77686: 2, 3, 4; MAX77802: 1, 2, 3, 4, 6 */
+ struct gpio_desc *buck_gpio_selb[5];
};
extern int max77686_setup_gpios(struct device *dev);
--
2.0.0.rc2
Add Device Tree binding documentation for Maxim 77802 PMIC.
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
Changes since v6: None
Changes since v5:
- Use max77686,* properties instead of max77802,* since the support is
now in the max77686 driver and that IP defined the properties first.
- Fix issues in DT binding documentation. Suggested by Andreas Farber.
Changes since v4: None
Changes since v3: None
Changes since v2:
- Explain better the Dynamic Voltage Scaling (DVS) support in some Buck
regulators and the max77802,pmic-buck-{dvs,selb}-gpios properties.
Suggested by Mark Brown.
---
Documentation/devicetree/bindings/mfd/max77802.txt | 95 ++++++++++++++++++++++
1 file changed, 95 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/max77802.txt
diff --git a/Documentation/devicetree/bindings/mfd/max77802.txt b/Documentation/devicetree/bindings/mfd/max77802.txt
new file mode 100644
index 0000000..5460e20
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/max77802.txt
@@ -0,0 +1,95 @@
+Maxim MAX77802 multi-function device
+
+MAX77802 is a Multifunction device with PMIC, RTC and Charger on chip. It is
+interfaced to host controller using i2c interface. PMIC, Charger and RTC
+submodules are addressed using same i2c slave address.
+
+Buck regulators 1, 2, 3, 4 and 6 include Dynamic Voltage Scaling (DVS) that
+allows each output voltage to change dynamically. Each Buck output voltage
+is selected using a set of external inputs: DVS1-3 and SELB1, 2, 3, 4 and 6.
+
+There are 8 DVS registers that can be used to configure the output voltage
+for each Buck regulator and which one is active is controled by DVSx lines.
+
+SELBx lines are used to control if individual Buck lines are ON or OFF.
+
+This document describes the binding for mfd device and PMIC submodule.
+
+Binding for the built-in 32k clock generator block is defined separately
+in bindings/clk/maxim,max77802.txt file.
+
+Required properties:
+- compatible : Must be "maxim,max77802";
+- reg : Specifies the i2c slave address of PMIC block.
+- interrupts : This i2c device has an IRQ line connected to the main SoC.
+- interrupt-parent : The parent interrupt controller.
+
+Optional properties:
+- max77686,pmic-buck-default-dvs-idx: We'll always write this DVS index in the
+ PMIC for Bucks with DVS.
+ NOTE: at the moment these bindings don't include enough details for actual
+ GPIO-DVS--this just lets you choose which single slot to use.
+
+- max77686,pmic-buck-dvs-gpios: A GPIO array where each GPIO is connected to a
+ DVS line. We'll try to set these GPIOs to match pmic-buck-default-dvs-idx at
+ probe time if they are defined. If some or all of these GPIOs are not defined
+ it's assumed that the board has any missing GPIOs hardwired to match
+ pmic-buck-default-dvs-idx.
+
+- max77686,pmic-buck-selb-gpios: A GPIO array where each GPIO is connected to a
+ SELBx line. Should be five values: 1, 2, 3, 4, 6. It is strongly suggested to
+ include these GPIOs if there's any chance that changing DVS GPIOs one line at
+ a time might glitch your DVS values.
+
+Optional node:
+- regulators : The regulators of max77802 have to be instantiated
+ under subnode named "regulators" using the following format.
+
+ regulator-name {
+ standard regulator constraints....
+ };
+ refer Documentation/devicetree/bindings/regulator/regulator.txt
+
+ The regulator node name should be initialized with a string
+to get matched with their hardware counterparts as follow. The valid names are:
+
+ -LDOn : for LDOs, where n can lie in range 1 to 35.
+ example: LDO1, LDO2, LDO35.
+ -BUCKn : for BUCKs, where n can lie in range 1 to 10.
+ example: BUCK1, BUCK5, BUCK10.
+Example:
+
+ max77802@09 {
+ compatible = "maxim,max77802";
+ interrupt-parent = <&wakeup_eint>;
+ interrupts = <26 0>;
+ reg = <0x09>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ max77686,pmic-buck-default-dvs-idx = <1>;
+ max77686,pmic-buck-dvs-gpios = <&gpy7 6 0>,
+ <&gpj4 2 0>,
+ <&gpj4 3 0>;
+ max77686,pmic-buck-selb-gpios = <&gph0 2 0>,
+ <&gph0 3 0>,
+ <&gph0 4 0>,
+ <&gph0 5 0>,
+ <&gph0 6 0>;
+
+ regulators {
+ ldo11_reg: LDO11 {
+ regulator-name = "vdd_ldo11";
+ regulator-min-microvolt = <1900000>;
+ regulator-max-microvolt = <1900000>;
+ regulator-always-on;
+ };
+
+ buck1_reg: BUCK1 {
+ regulator-name = "vdd_mif";
+ regulator-min-microvolt = <950000>;
+ regulator-max-microvolt = <1300000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+ };
--
2.0.0.rc2
The MAX77802 PMIC has 10 high-efficiency Buck and 32 Low-dropout
(LDO) regulators. This patch adds support for all these regulators
found on the MAX77802 PMIC and is based on a driver added by Simon
Glass to the Chrome OS kernel 3.8 tree.
Signed-off-by: Javier Martinez Canillas <[email protected]>
Tested-by: Naveen Krishna Chatradhi <[email protected]>
---
Changes since v6: None
Changes since v5:
- Take out the mfd changes from v4 that were squashed by mistake.
Suggested by Lee Jones.
Changes since v4: None
Changes since v3:
- Set the supply_name for regulators to lookup their parent supply node.
Suggested by Mark Brown.
- Change Exyno5 for Exynos5420/Exynos5800 in regulator driver Kconfig.
Suggested by Doug Anderson.
---
drivers/regulator/Kconfig | 9 +
drivers/regulator/Makefile | 1 +
drivers/regulator/max77802.c | 609 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 619 insertions(+)
create mode 100644 drivers/regulator/max77802.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 789eb46..96d1c68 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -377,6 +377,15 @@ config REGULATOR_MAX77693
and one current regulator 'CHARGER'. This is suitable for
Exynos-4x12 chips.
+config REGULATOR_MAX77802
+ tristate "Maxim 77802 regulator"
+ depends on MFD_MAX77686
+ help
+ This driver controls a Maxim 77802 regulator
+ via I2C bus. The provided regulator is suitable for
+ Exynos5420/Exynos5800 SoCs to control various voltages.
+ It includes support for control of voltage and ramp speed.
+
config REGULATOR_MC13XXX_CORE
tristate
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index d461110..2aea4b6 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -51,6 +51,7 @@ obj-$(CONFIG_REGULATOR_MAX8997) += max8997.o
obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o
obj-$(CONFIG_REGULATOR_MAX77686) += max77686.o
obj-$(CONFIG_REGULATOR_MAX77693) += max77693.o
+obj-$(CONFIG_REGULATOR_MAX77802) += max77802.o
obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o
obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o
obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o
diff --git a/drivers/regulator/max77802.c b/drivers/regulator/max77802.c
new file mode 100644
index 0000000..23b2488
--- /dev/null
+++ b/drivers/regulator/max77802.c
@@ -0,0 +1,609 @@
+/*
+ * max77802.c - Regulator driver for the Maxim 77802
+ *
+ * Copyright (C) 2013-2014 Google, Inc
+ * Simon Glass <[email protected]>
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * Chiwoong Byun <[email protected]>
+ * Jonghwa Lee <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * This driver is based on max8997.c
+ */
+
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/gpio/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/mfd/max77686.h>
+#include <linux/mfd/max77686-private.h>
+
+/* Default ramp delay in case it is not manually set */
+#define MAX77802_RAMP_DELAY 100000 /* uV/us */
+
+#define MAX77802_OPMODE_SHIFT_LDO 6
+#define MAX77802_OPMODE_BUCK234_SHIFT 4
+#define MAX77802_OPMODE_MASK 0x3
+
+#define MAX77802_VSEL_MASK 0x3F
+#define MAX77802_DVS_VSEL_MASK 0xFF
+
+#define MAX77802_RAMP_RATE_MASK_2BIT 0xC0
+#define MAX77802_RAMP_RATE_SHIFT_2BIT 6
+#define MAX77802_RAMP_RATE_MASK_4BIT 0xF0
+#define MAX77802_RAMP_RATE_SHIFT_4BIT 4
+
+/* MAX77802 has two register formats: 2-bit and 4-bit */
+static const unsigned int ramp_table_77802_2bit[] = {
+ 12500,
+ 25000,
+ 50000,
+ 100000,
+};
+
+static unsigned int ramp_table_77802_4bit[] = {
+ 1000, 2000, 3030, 4000,
+ 5000, 5880, 7140, 8330,
+ 9090, 10000, 11110, 12500,
+ 16670, 25000, 50000, 100000,
+};
+
+struct max77802_regulator_prv {
+ int num_regulators;
+ struct regulator_dev *rdev[MAX77802_REG_MAX];
+ unsigned int opmode[MAX77802_REG_MAX];
+};
+
+static int max77802_get_opmode_shift(int id)
+{
+ if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)
+ return MAX77802_OPMODE_SHIFT_LDO;
+ else if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&
+ id <= MAX77802_BUCK10))
+ return 0;
+ else if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)
+ return MAX77802_OPMODE_BUCK234_SHIFT;
+ else
+ return -EINVAL;
+}
+
+/*
+ * Some BUCKS supports Normal[ON/OFF] mode during suspend
+ *
+ * BUCK 1, 6, 2-4, 5, 7-10 (all)
+ *
+ * The other mode (0x02) will make PWRREQ switch between normal
+ * and low power.
+ */
+static int max77802_buck_set_suspend_disable(struct regulator_dev *rdev)
+{
+ unsigned int val = MAX77802_OPMODE_STANDBY;
+ struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+ int shift = max77802_get_opmode_shift(id);
+
+ max77802->opmode[id] = val;
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask, val << shift);
+}
+
+/*
+ * Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state
+ * (Enable Control Logic1 by PWRREQ)
+ *
+ * LDOs 2, 4-19, 22-35.
+ *
+ */
+static int max77802_ldo_set_suspend_mode_logic1(struct regulator_dev *rdev,
+ unsigned int mode)
+{
+ struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+ unsigned int val;
+ int shift = max77802_get_opmode_shift(id);
+
+ switch (mode) {
+ case REGULATOR_MODE_IDLE: /* ON in LP Mode */
+ val = MAX77802_OPMODE_LP;
+ break;
+ case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
+ val = MAX77802_OPMODE_NORMAL;
+ break;
+ case REGULATOR_MODE_STANDBY: /* ON/OFF by PWRREQ */
+ val = MAX77802_OPMODE_STANDBY;
+ break;
+ default:
+ dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
+ rdev->desc->name, mode);
+ return -EINVAL;
+ }
+
+ max77802->opmode[rdev_get_id(rdev)] = val;
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask, val << shift);
+}
+
+/*
+ * Mode 1 (Output[ON/OFF] by PWRREQ) is not supported on some LDOs
+ * (Enable Control Logic2 by PWRREQ)
+ *
+ * LDOs 1, 20, 21, and 3,
+ *
+ */
+static int max77802_ldo_set_suspend_mode_logic2(struct regulator_dev *rdev,
+ unsigned int mode)
+{
+ struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+ unsigned int val;
+ int shift = max77802_get_opmode_shift(id);
+
+ switch (mode) {
+ case REGULATOR_MODE_IDLE: /* ON in LP Mode */
+ val = MAX77802_OPMODE_LP;
+ break;
+ case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
+ val = MAX77802_OPMODE_NORMAL;
+ break;
+ default:
+ dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
+ rdev->desc->name, mode);
+ return -EINVAL;
+ }
+
+ max77802->opmode[rdev_get_id(rdev)] = val;
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask, val << shift);
+}
+
+static int max77802_enable(struct regulator_dev *rdev)
+{
+ struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+ int shift = max77802_get_opmode_shift(id);
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask,
+ max77802->opmode[id] << shift);
+}
+
+static int max77802_find_ramp_value(struct regulator_dev *rdev,
+ const unsigned int limits[], int size,
+ unsigned int ramp_delay)
+{
+ int i;
+
+ for (i = 0; i < size; i++) {
+ if (ramp_delay <= limits[i])
+ return i;
+ }
+
+ /* Use maximum value for no ramp control */
+ dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n",
+ rdev->desc->name, ramp_delay);
+ return size - 1;
+}
+
+/* Used for BUCKs 2-4 */
+static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev,
+ int ramp_delay)
+{
+ int id = rdev_get_id(rdev);
+ unsigned int ramp_value;
+
+ if (id > MAX77802_BUCK4) {
+ dev_warn(&rdev->dev,
+ "%s: regulator: ramp delay not supported\n",
+ rdev->desc->name);
+ return -EINVAL;
+ }
+ ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit,
+ ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay);
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ MAX77802_RAMP_RATE_MASK_2BIT,
+ ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT);
+}
+
+/* For BUCK1, 6 */
+static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev,
+ int ramp_delay)
+{
+ unsigned int ramp_value;
+
+ ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit,
+ ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay);
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ MAX77802_RAMP_RATE_MASK_4BIT,
+ ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT);
+}
+
+/*
+ * LDOs 2, 4-19, 22-35
+ */
+static struct regulator_ops max77802_ldo_ops_logic1 = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77802_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_suspend_mode = max77802_ldo_set_suspend_mode_logic1,
+};
+
+/*
+ * LDOs 1, 20, 21, 3
+ */
+static struct regulator_ops max77802_ldo_ops_logic2 = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77802_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_suspend_mode = max77802_ldo_set_suspend_mode_logic2,
+};
+
+/* BUCKS 1, 6 */
+static struct regulator_ops max77802_buck_16_dvs_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77802_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_ramp_delay = max77802_set_ramp_delay_4bit,
+ .set_suspend_disable = max77802_buck_set_suspend_disable,
+};
+
+/* BUCKs 2-4, 5, 7-10 */
+static struct regulator_ops max77802_buck_dvs_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77802_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_ramp_delay = max77802_set_ramp_delay_2bit,
+ .set_suspend_disable = max77802_buck_set_suspend_disable,
+};
+
+/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
+#define regulator_77802_desc_p_ldo(num, supply, log) { \
+ .name = "LDO"#num, \
+ .id = MAX77802_LDO##num, \
+ .supply_name = "inl"#supply, \
+ .ops = &max77802_ldo_ops_logic##log, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = 800000, \
+ .uV_step = 50000, \
+ .ramp_delay = MAX77802_RAMP_DELAY, \
+ .n_voltages = 1 << 6, \
+ .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
+ .vsel_mask = MAX77802_VSEL_MASK, \
+ .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
+ .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
+}
+
+/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
+#define regulator_77802_desc_n_ldo(num, supply, log) { \
+ .name = "LDO"#num, \
+ .id = MAX77802_LDO##num, \
+ .supply_name = "inl"#supply, \
+ .ops = &max77802_ldo_ops_logic##log, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = 800000, \
+ .uV_step = 25000, \
+ .ramp_delay = MAX77802_RAMP_DELAY, \
+ .n_voltages = 1 << 6, \
+ .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
+ .vsel_mask = MAX77802_VSEL_MASK, \
+ .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
+ .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
+}
+
+/* BUCKs 1, 6 */
+#define regulator_77802_desc_16_buck(num) { \
+ .name = "BUCK"#num, \
+ .id = MAX77802_BUCK##num, \
+ .supply_name = "inb"#num, \
+ .ops = &max77802_buck_16_dvs_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = 612500, \
+ .uV_step = 6250, \
+ .ramp_delay = MAX77802_RAMP_DELAY, \
+ .n_voltages = 1 << 8, \
+ .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
+ .vsel_mask = MAX77802_DVS_VSEL_MASK, \
+ .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \
+ .enable_mask = MAX77802_OPMODE_MASK, \
+}
+
+/* BUCKS 2-4 */
+#define regulator_77802_desc_234_buck(num) { \
+ .name = "BUCK"#num, \
+ .id = MAX77802_BUCK##num, \
+ .supply_name = "inb"#num, \
+ .ops = &max77802_buck_dvs_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = 600000, \
+ .uV_step = 6250, \
+ .ramp_delay = MAX77802_RAMP_DELAY, \
+ .n_voltages = 0x91, \
+ .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
+ .vsel_mask = MAX77802_DVS_VSEL_MASK, \
+ .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \
+ .enable_mask = MAX77802_OPMODE_MASK << \
+ MAX77802_OPMODE_BUCK234_SHIFT, \
+}
+
+/* BUCK 5 */
+#define regulator_77802_desc_buck5(num) { \
+ .name = "BUCK"#num, \
+ .id = MAX77802_BUCK##num, \
+ .supply_name = "inb"#num, \
+ .ops = &max77802_buck_dvs_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = 750000, \
+ .uV_step = 50000, \
+ .ramp_delay = MAX77802_RAMP_DELAY, \
+ .n_voltages = 1 << 6, \
+ .vsel_reg = MAX77802_REG_BUCK5OUT, \
+ .vsel_mask = MAX77802_VSEL_MASK, \
+ .enable_reg = MAX77802_REG_BUCK5CTRL, \
+ .enable_mask = MAX77802_OPMODE_MASK, \
+}
+
+/* BUCKs 7-10 */
+#define regulator_77802_desc_buck7_10(num) { \
+ .name = "BUCK"#num, \
+ .id = MAX77802_BUCK##num, \
+ .supply_name = "inb"#num, \
+ .ops = &max77802_buck_dvs_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = 750000, \
+ .uV_step = 50000, \
+ .ramp_delay = MAX77802_RAMP_DELAY, \
+ .n_voltages = 1 << 6, \
+ .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \
+ .vsel_mask = MAX77802_VSEL_MASK, \
+ .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \
+ .enable_mask = MAX77802_OPMODE_MASK, \
+}
+
+static struct regulator_desc regulators[] = {
+ regulator_77802_desc_16_buck(1),
+ regulator_77802_desc_234_buck(2),
+ regulator_77802_desc_234_buck(3),
+ regulator_77802_desc_234_buck(4),
+ regulator_77802_desc_buck5(5),
+ regulator_77802_desc_16_buck(6),
+ regulator_77802_desc_buck7_10(7),
+ regulator_77802_desc_buck7_10(8),
+ regulator_77802_desc_buck7_10(9),
+ regulator_77802_desc_buck7_10(10),
+ regulator_77802_desc_n_ldo(1, 10, 2),
+ regulator_77802_desc_n_ldo(2, 10, 1),
+ regulator_77802_desc_p_ldo(3, 3, 2),
+ regulator_77802_desc_p_ldo(4, 6, 1),
+ regulator_77802_desc_p_ldo(5, 3, 1),
+ regulator_77802_desc_p_ldo(6, 3, 1),
+ regulator_77802_desc_p_ldo(7, 3, 1),
+ regulator_77802_desc_n_ldo(8, 1, 1),
+ regulator_77802_desc_p_ldo(9, 5, 1),
+ regulator_77802_desc_p_ldo(10, 4, 1),
+ regulator_77802_desc_p_ldo(11, 4, 1),
+ regulator_77802_desc_p_ldo(12, 9, 1),
+ regulator_77802_desc_p_ldo(13, 4, 1),
+ regulator_77802_desc_p_ldo(14, 4, 1),
+ regulator_77802_desc_n_ldo(15, 1, 1),
+ regulator_77802_desc_n_ldo(17, 2, 1),
+ regulator_77802_desc_p_ldo(18, 7, 1),
+ regulator_77802_desc_p_ldo(19, 5, 1),
+ regulator_77802_desc_p_ldo(20, 7, 2),
+ regulator_77802_desc_p_ldo(21, 6, 2),
+ regulator_77802_desc_p_ldo(23, 9, 1),
+ regulator_77802_desc_p_ldo(24, 6, 1),
+ regulator_77802_desc_p_ldo(25, 9, 1),
+ regulator_77802_desc_p_ldo(26, 9, 1),
+ regulator_77802_desc_n_ldo(27, 2, 1),
+ regulator_77802_desc_p_ldo(28, 7, 1),
+ regulator_77802_desc_p_ldo(29, 7, 1),
+ regulator_77802_desc_n_ldo(30, 2, 1),
+ regulator_77802_desc_p_ldo(32, 9, 1),
+ regulator_77802_desc_p_ldo(33, 6, 1),
+ regulator_77802_desc_p_ldo(34, 9, 1),
+ regulator_77802_desc_n_ldo(35, 2, 1),
+};
+
+#ifdef CONFIG_OF
+static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev,
+ struct max77686_platform_data *pdata)
+{
+ struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct device_node *pmic_np, *regulators_np;
+ struct max77686_regulator_data *rdata;
+ struct of_regulator_match rmatch;
+ unsigned int i;
+
+ pmic_np = iodev->dev->of_node;
+ regulators_np = of_get_child_by_name(pmic_np, "regulators");
+ if (!regulators_np) {
+ dev_err(&pdev->dev, "could not find regulators sub-node\n");
+ return -EINVAL;
+ }
+
+ pdata->num_regulators = ARRAY_SIZE(regulators);
+ rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
+ pdata->num_regulators, GFP_KERNEL);
+ if (!rdata) {
+ of_node_put(regulators_np);
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < pdata->num_regulators; i++) {
+ rmatch.name = regulators[i].name;
+ rmatch.init_data = NULL;
+ rmatch.of_node = NULL;
+ if (of_regulator_match(&pdev->dev, regulators_np, &rmatch,
+ 1) != 1) {
+ dev_warn(&pdev->dev, "No matching regulator for '%s'\n",
+ rmatch.name);
+ continue;
+ }
+ rdata[i].initdata = rmatch.init_data;
+ rdata[i].of_node = rmatch.of_node;
+ rdata[i].id = regulators[i].id;
+ }
+
+ pdata->regulators = rdata;
+ of_node_put(regulators_np);
+
+ return 0;
+}
+#else
+static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev,
+ struct max77686_platform_data *pdata)
+{
+ return 0;
+}
+#endif /* CONFIG_OF */
+
+static inline bool max77802_is_dvs_buck(int id)
+{
+ /* BUCK 1,2,3,4 and 6 support DVS */
+ return ((id >= MAX77802_BUCK1 && id <= MAX77802_BUCK4) ||
+ (id == MAX77802_BUCK6));
+}
+
+static int max77802_pmic_probe(struct platform_device *pdev)
+{
+ struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
+ struct max77802_regulator_prv *max77802;
+ int i, ret = 0, val;
+ struct regulator_config config = { };
+ unsigned int reg;
+ int buck_default_idx;
+ int buck_old_idx;
+
+ /* This is allocated by the MFD driver */
+ if (!pdata) {
+ dev_err(&pdev->dev, "no platform data found for regulator\n");
+ return -ENODEV;
+ }
+
+ max77802 = devm_kzalloc(&pdev->dev,
+ sizeof(struct max77802_regulator_prv),
+ GFP_KERNEL);
+ if (!max77802)
+ return -ENOMEM;
+
+ if (iodev->dev->of_node) {
+ ret = max77802_pmic_dt_parse_pdata(pdev, pdata);
+ if (ret)
+ return ret;
+ }
+
+ config.dev = iodev->dev;
+ config.regmap = iodev->regmap;
+ config.driver_data = max77802;
+ platform_set_drvdata(pdev, max77802);
+
+ buck_default_idx = pdata->buck_default_idx;
+ buck_old_idx = max77686_read_gpios(pdata);
+
+ for (i = 0; i < MAX77802_REG_MAX; i++) {
+ struct regulator_dev *rdev;
+ int id = pdata->regulators[i].id;
+ int shift = max77802_get_opmode_shift(id);
+
+ config.init_data = pdata->regulators[i].initdata;
+ config.of_node = pdata->regulators[i].of_node;
+
+ ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
+ max77802->opmode[id] = val >> shift & MAX77802_OPMODE_MASK;
+
+ if (max77802_is_dvs_buck(id)) {
+ /* Try to copy over data so we keep firmware settings */
+ reg = regulators[i].vsel_reg;
+
+ ret = regmap_reg_copy(iodev->regmap,
+ reg + buck_default_idx,
+ reg + buck_old_idx);
+
+ if (ret)
+ dev_warn(&pdev->dev, "Copy err %d => %d (%d)\n",
+ reg + buck_old_idx,
+ reg + buck_default_idx, ret);
+
+ regulators[i].vsel_reg += buck_default_idx;
+ }
+
+ rdev = devm_regulator_register(&pdev->dev,
+ ®ulators[i], &config);
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev,
+ "regulator init failed for %d\n", i);
+ return PTR_ERR(rdev);
+ }
+ }
+
+ ret = max77686_setup_gpios(iodev->dev);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct platform_device_id max77802_pmic_id[] = {
+ {"max77802-pmic", 0},
+ { },
+};
+MODULE_DEVICE_TABLE(platform, max77802_pmic_id);
+
+static struct platform_driver max77802_pmic_driver = {
+ .driver = {
+ .name = "max77802-pmic",
+ .owner = THIS_MODULE,
+ },
+ .probe = max77802_pmic_probe,
+ .id_table = max77802_pmic_id,
+};
+
+module_platform_driver(max77802_pmic_driver);
+
+MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
+MODULE_AUTHOR("Simon Glass <[email protected]>");
+MODULE_LICENSE("GPL");
--
2.0.0.rc2
The MAX7802 PMIC has a Real-Time-Clock (RTC) with two alarms.
This patch adds support for the RTC and is based on a driver
added by Simon Glass to the Chrome OS kernel 3.8 tree.
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
Changes since v6:
- Remove unused code for SMPL and WTSR. Suggested by Krzysztof Kozlowski.
- Don't spam the kernel log with unimportant info and just print for debug.
Suggested by Krzysztof Kozlowski.
- Use ARRAY_SIZE() instead of constant value. Suggested by Krzysztof Kozlowski.
- Remove duplicated register setup. Suggested by Krzysztof Kozlowski.
- Don't free/unregister managed allocated resources.
Suggested by Krzysztof Kozlowski.
---
drivers/rtc/Kconfig | 10 +
drivers/rtc/Makefile | 1 +
drivers/rtc/rtc-max77802.c | 508 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 519 insertions(+)
create mode 100644 drivers/rtc/rtc-max77802.c
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index a672dd1..243ac72 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -288,6 +288,16 @@ config RTC_DRV_MAX77686
This driver can also be built as a module. If so, the module
will be called rtc-max77686.
+config RTC_DRV_MAX77802
+ tristate "Maxim 77802 RTC"
+ depends on MFD_MAX77686
+ help
+ If you say yes here you will get support for the
+ RTC of Maxim MAX77802 PMIC.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-max77802.
+
config RTC_DRV_RS5C372
tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
help
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 70347d0..247de78 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -81,6 +81,7 @@ obj-$(CONFIG_RTC_DRV_MAX8998) += rtc-max8998.o
obj-$(CONFIG_RTC_DRV_MAX8997) += rtc-max8997.o
obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
obj-$(CONFIG_RTC_DRV_MAX77686) += rtc-max77686.o
+obj-$(CONFIG_RTC_DRV_MAX77802) += rtc-max77802.o
obj-$(CONFIG_RTC_DRV_MC13XXX) += rtc-mc13xxx.o
obj-$(CONFIG_RTC_DRV_MCP795) += rtc-mcp795.o
obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o
diff --git a/drivers/rtc/rtc-max77802.c b/drivers/rtc/rtc-max77802.c
new file mode 100644
index 0000000..f8898ff
--- /dev/null
+++ b/drivers/rtc/rtc-max77802.c
@@ -0,0 +1,508 @@
+/*
+ * RTC driver for Maxim MAX77802
+ *
+ * Copyright (C) 2013 Google, Inc
+ *
+ * Copyright (C) 2012 Samsung Electronics Co.Ltd
+ *
+ * based on rtc-max8997.c
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/rtc.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/max77686-private.h>
+#include <linux/irqdomain.h>
+#include <linux/regmap.h>
+
+/* RTC Control Register */
+#define BCD_EN_SHIFT 0
+#define BCD_EN_MASK (1 << BCD_EN_SHIFT)
+#define MODEL24_SHIFT 1
+#define MODEL24_MASK (1 << MODEL24_SHIFT)
+/* RTC Update Register1 */
+#define RTC_UDR_SHIFT 0
+#define RTC_UDR_MASK (1 << RTC_UDR_SHIFT)
+#define RTC_RBUDR_SHIFT 4
+#define RTC_RBUDR_MASK (1 << RTC_RBUDR_SHIFT)
+/* RTC Hour register */
+#define HOUR_PM_SHIFT 6
+#define HOUR_PM_MASK (1 << HOUR_PM_SHIFT)
+/* RTC Alarm Enable */
+#define ALARM_ENABLE_SHIFT 7
+#define ALARM_ENABLE_MASK (1 << ALARM_ENABLE_SHIFT)
+
+/* For the RTCAE1 register, we write this value to enable the alarm */
+#define ALARM_ENABLE_VALUE 0x77
+
+#define MAX77802_RTC_UPDATE_DELAY_US 200
+
+enum {
+ RTC_SEC = 0,
+ RTC_MIN,
+ RTC_HOUR,
+ RTC_WEEKDAY,
+ RTC_MONTH,
+ RTC_YEAR,
+ RTC_DATE,
+ RTC_NR_TIME
+};
+
+struct max77802_rtc_info {
+ struct device *dev;
+ struct max77686_dev *max77802;
+ struct i2c_client *rtc;
+ struct rtc_device *rtc_dev;
+ struct mutex lock;
+
+ struct regmap *regmap;
+
+ int virq;
+ int rtc_24hr_mode;
+};
+
+enum MAX77802_RTC_OP {
+ MAX77802_RTC_WRITE,
+ MAX77802_RTC_READ,
+};
+
+static inline int max77802_rtc_calculate_wday(u8 shifted)
+{
+ int counter = -1;
+
+ while (shifted) {
+ shifted >>= 1;
+ counter++;
+ }
+
+ return counter;
+}
+
+static void max77802_rtc_data_to_tm(u8 *data, struct rtc_time *tm,
+ int rtc_24hr_mode)
+{
+ tm->tm_sec = data[RTC_SEC] & 0xff;
+ tm->tm_min = data[RTC_MIN] & 0xff;
+ if (rtc_24hr_mode)
+ tm->tm_hour = data[RTC_HOUR] & 0x1f;
+ else {
+ tm->tm_hour = data[RTC_HOUR] & 0x0f;
+ if (data[RTC_HOUR] & HOUR_PM_MASK)
+ tm->tm_hour += 12;
+ }
+
+ tm->tm_wday = max77802_rtc_calculate_wday(data[RTC_WEEKDAY] & 0xff);
+ tm->tm_mday = data[RTC_DATE] & 0x1f;
+ tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
+
+ tm->tm_year = data[RTC_YEAR] & 0xff;
+ tm->tm_yday = 0;
+ tm->tm_isdst = 0;
+}
+
+static int max77802_rtc_tm_to_data(struct rtc_time *tm, u8 *data)
+{
+ data[RTC_SEC] = tm->tm_sec;
+ data[RTC_MIN] = tm->tm_min;
+ data[RTC_HOUR] = tm->tm_hour;
+ data[RTC_WEEKDAY] = 1 << tm->tm_wday;
+ data[RTC_DATE] = tm->tm_mday;
+ data[RTC_MONTH] = tm->tm_mon + 1;
+ data[RTC_YEAR] = tm->tm_year;
+
+ return 0;
+}
+
+static int max77802_rtc_update(struct max77802_rtc_info *info,
+ enum MAX77802_RTC_OP op)
+{
+ int ret;
+ unsigned int data;
+
+ if (op == MAX77802_RTC_WRITE)
+ data = 1 << RTC_UDR_SHIFT;
+ else
+ data = 1 << RTC_RBUDR_SHIFT;
+
+ ret = regmap_update_bits(info->max77802->regmap,
+ MAX77802_RTC_UPDATE0, data, data);
+ if (ret < 0)
+ dev_err(info->dev, "%s: fail to write update reg(ret=%d, data=0x%x)\n",
+ __func__, ret, data);
+ else {
+ /* Minimum delay required before RTC update. */
+ usleep_range(MAX77802_RTC_UPDATE_DELAY_US,
+ MAX77802_RTC_UPDATE_DELAY_US * 2);
+ }
+
+ return ret;
+}
+
+static int max77802_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct max77802_rtc_info *info = dev_get_drvdata(dev);
+ u8 data[RTC_NR_TIME];
+ int ret;
+
+ mutex_lock(&info->lock);
+
+ ret = max77802_rtc_update(info, MAX77802_RTC_READ);
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_bulk_read(info->max77802->regmap,
+ MAX77802_RTC_SEC, data, RTC_NR_TIME);
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__,
+ ret);
+ goto out;
+ }
+
+ max77802_rtc_data_to_tm(data, tm, info->rtc_24hr_mode);
+
+ ret = rtc_valid_tm(tm);
+
+out:
+ mutex_unlock(&info->lock);
+ return ret;
+}
+
+static int max77802_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct max77802_rtc_info *info = dev_get_drvdata(dev);
+ u8 data[RTC_NR_TIME];
+ int ret;
+
+ ret = max77802_rtc_tm_to_data(tm, data);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&info->lock);
+
+ ret = regmap_bulk_write(info->max77802->regmap,
+ MAX77802_RTC_SEC, data, RTC_NR_TIME);
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__,
+ ret);
+ goto out;
+ }
+
+ ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
+
+out:
+ mutex_unlock(&info->lock);
+ return ret;
+}
+
+static int max77802_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct max77802_rtc_info *info = dev_get_drvdata(dev);
+ u8 data[RTC_NR_TIME];
+ unsigned int val;
+ int ret;
+
+ mutex_lock(&info->lock);
+
+ ret = max77802_rtc_update(info, MAX77802_RTC_READ);
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_bulk_read(info->max77802->regmap,
+ MAX77802_ALARM1_SEC, data, RTC_NR_TIME);
+ if (ret < 0) {
+ dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n",
+ __func__, __LINE__, ret);
+ goto out;
+ }
+
+ max77802_rtc_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
+
+ alrm->enabled = 0;
+ ret = regmap_read(info->max77802->regmap,
+ MAX77802_RTC_AE1, &val);
+ if (ret < 0) {
+ dev_err(info->dev, "%s:%d fail to read alarm enable(%d)\n",
+ __func__, __LINE__, ret);
+ goto out;
+ }
+ if (val)
+ alrm->enabled = 1;
+
+ alrm->pending = 0;
+ ret = regmap_read(info->max77802->regmap, MAX77802_REG_STATUS2, &val);
+ if (ret < 0) {
+ dev_err(info->dev, "%s:%d fail to read status2 reg(%d)\n",
+ __func__, __LINE__, ret);
+ goto out;
+ }
+
+ if (val & (1 << 2)) /* RTCA1 */
+ alrm->pending = 1;
+
+out:
+ mutex_unlock(&info->lock);
+ return 0;
+}
+
+static int max77802_rtc_stop_alarm(struct max77802_rtc_info *info)
+{
+ int ret;
+
+ if (!mutex_is_locked(&info->lock))
+ dev_warn(info->dev, "%s: should have mutex locked\n", __func__);
+
+ ret = max77802_rtc_update(info, MAX77802_RTC_READ);
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_write(info->max77802->regmap,
+ MAX77802_RTC_AE1, 0);
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
+ __func__, ret);
+ goto out;
+ }
+
+ ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
+out:
+ return ret;
+}
+
+static int max77802_rtc_start_alarm(struct max77802_rtc_info *info)
+{
+ int ret;
+
+ if (!mutex_is_locked(&info->lock))
+ dev_warn(info->dev, "%s: should have mutex locked\n",
+ __func__);
+
+ ret = max77802_rtc_update(info, MAX77802_RTC_READ);
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_write(info->max77802->regmap,
+ MAX77802_RTC_AE1,
+ ALARM_ENABLE_VALUE);
+
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to read alarm reg(%d)\n",
+ __func__, ret);
+ goto out;
+ }
+
+ ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
+out:
+ return ret;
+}
+
+static int max77802_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct max77802_rtc_info *info = dev_get_drvdata(dev);
+ u8 data[RTC_NR_TIME];
+ int ret;
+
+ ret = max77802_rtc_tm_to_data(&alrm->time, data);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&info->lock);
+
+ ret = max77802_rtc_stop_alarm(info);
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_bulk_write(info->max77802->regmap,
+ MAX77802_ALARM1_SEC, data, RTC_NR_TIME);
+
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
+ __func__, ret);
+ goto out;
+ }
+
+ ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
+ if (ret < 0)
+ goto out;
+
+ if (alrm->enabled)
+ ret = max77802_rtc_start_alarm(info);
+out:
+ mutex_unlock(&info->lock);
+ return ret;
+}
+
+static int max77802_rtc_alarm_irq_enable(struct device *dev,
+ unsigned int enabled)
+{
+ struct max77802_rtc_info *info = dev_get_drvdata(dev);
+ int ret;
+
+ mutex_lock(&info->lock);
+ if (enabled)
+ ret = max77802_rtc_start_alarm(info);
+ else
+ ret = max77802_rtc_stop_alarm(info);
+ mutex_unlock(&info->lock);
+
+ return ret;
+}
+
+static irqreturn_t max77802_rtc_alarm_irq(int irq, void *data)
+{
+ struct max77802_rtc_info *info = data;
+
+ dev_dbg(info->dev, "%s:irq(%d)\n", __func__, irq);
+
+ rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
+
+ return IRQ_HANDLED;
+}
+
+static const struct rtc_class_ops max77802_rtc_ops = {
+ .read_time = max77802_rtc_read_time,
+ .set_time = max77802_rtc_set_time,
+ .read_alarm = max77802_rtc_read_alarm,
+ .set_alarm = max77802_rtc_set_alarm,
+ .alarm_irq_enable = max77802_rtc_alarm_irq_enable,
+};
+
+static int max77802_rtc_init_reg(struct max77802_rtc_info *info)
+{
+ u8 data[2];
+ int ret;
+
+ max77802_rtc_update(info, MAX77802_RTC_READ);
+
+ /* Set RTC control register : Binary mode, 24hour mdoe */
+ data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
+ data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
+
+ info->rtc_24hr_mode = 1;
+
+ ret = regmap_bulk_write(info->max77802->regmap,
+ MAX77802_RTC_CONTROLM, data, ARRAY_SIZE(data));
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
+ return ret;
+}
+
+static int max77802_rtc_probe(struct platform_device *pdev)
+{
+ struct max77686_dev *max77802 = dev_get_drvdata(pdev->dev.parent);
+ struct max77802_rtc_info *info;
+ int ret;
+
+ dev_dbg(&pdev->dev, "%s\n", __func__);
+
+ info = devm_kzalloc(&pdev->dev, sizeof(struct max77802_rtc_info),
+ GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ mutex_init(&info->lock);
+ info->dev = &pdev->dev;
+ info->max77802 = max77802;
+ info->rtc = max77802->i2c;
+
+ platform_set_drvdata(pdev, info);
+
+ ret = max77802_rtc_init_reg(info);
+
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to initialize RTC reg:%d\n", ret);
+ return ret;
+ }
+
+ device_init_wakeup(&pdev->dev, 1);
+
+ info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max77802-rtc",
+ &max77802_rtc_ops, THIS_MODULE);
+
+ if (IS_ERR(info->rtc_dev)) {
+ ret = PTR_ERR(info->rtc_dev);
+ dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
+ if (ret == 0)
+ ret = -EINVAL;
+ return ret;
+ }
+ info->virq = regmap_irq_get_virq(max77802->rtc_irq_data,
+ MAX77686_RTCIRQ_RTCA1);
+
+ if (info->virq <= 0) {
+ dev_err(&pdev->dev, "Failed to get virtual IRQ %d\n",
+ MAX77686_RTCIRQ_RTCA1);
+ ret = -EINVAL;
+ return ret;
+ }
+
+ ret = devm_request_threaded_irq(&pdev->dev, info->virq, NULL,
+ max77802_rtc_alarm_irq, 0, "rtc-alarm1",
+ info);
+ if (ret < 0)
+ dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
+ info->virq, ret);
+
+ return ret;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int max77802_rtc_suspend(struct device *dev)
+{
+ if (device_may_wakeup(dev)) {
+ struct max77802_rtc_info *info = dev_get_drvdata(dev);
+
+ return enable_irq_wake(info->virq);
+ }
+
+ return 0;
+}
+
+static int max77802_rtc_resume(struct device *dev)
+{
+ if (device_may_wakeup(dev)) {
+ struct max77802_rtc_info *info = dev_get_drvdata(dev);
+
+ return disable_irq_wake(info->virq);
+ }
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(max77802_rtc_pm_ops,
+ max77802_rtc_suspend, max77802_rtc_resume);
+
+static const struct platform_device_id rtc_id[] = {
+ { "max77802-rtc", 0 },
+ {},
+};
+
+static struct platform_driver max77802_rtc_driver = {
+ .driver = {
+ .name = "max77802-rtc",
+ .owner = THIS_MODULE,
+ .pm = &max77802_rtc_pm_ops,
+ },
+ .probe = max77802_rtc_probe,
+ .id_table = rtc_id,
+};
+
+module_platform_driver(max77802_rtc_driver);
+
+MODULE_DESCRIPTION("Maxim MAX77802 RTC driver");
+MODULE_AUTHOR("Simon Glass <[email protected]>");
+MODULE_LICENSE("GPL");
--
2.0.0.rc2
Peach pit and pi boards uses a Maxim 77802 power management
IC to drive regulators and its Real Time Clock. This patch
adds support for this chip.
These are the device nodes and pinctrl configuration that
are present on the Peach pit DeviceTree source file in the
the Chrome OS kernel 3.8 tree.
Signed-off-by: Javier Martinez Canillas <[email protected]>
Tested-by: Naveen Krishna Chatradhi <[email protected]>
---
Changes since v6: None
Changes since v5:
- Fix style issues and a typo on peach pit and pi DTS.
Suggested by Tushar Behera.
Changes since v4: None
Changes since v3:
- Add support for Exynos5800 based Peach pi board. Suggested by Doug Anderson.
- Model the actual regulators relationship instead of a simplistic model.
Suggested by Mark Brown.
Changes since v2: None
Changes since v1:
- Use "regulators" for child node instead of "voltage-regulators" to be
consistent with other PMIC. Suggested by Mark Brown.
- Use regulators node names instead of the deprecated "regulator-compatible"
property. Suggested by Mark Brown.
---
arch/arm/boot/dts/exynos5420-peach-pit.dts | 382 +++++++++++++++++++++++++++++
arch/arm/boot/dts/exynos5800-peach-pi.dts | 382 +++++++++++++++++++++++++++++
2 files changed, 764 insertions(+)
diff --git a/arch/arm/boot/dts/exynos5420-peach-pit.dts b/arch/arm/boot/dts/exynos5420-peach-pit.dts
index b2f1237..99768d7 100644
--- a/arch/arm/boot/dts/exynos5420-peach-pit.dts
+++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts
@@ -143,6 +143,350 @@
ddc = <&i2c_2>;
};
+&hsi2c_4 {
+ status = "okay";
+ clock-frequency = <400000>;
+
+ max77802-pmic@9 {
+ compatible = "maxim,max77802";
+ interrupt-parent = <&gpx3>;
+ interrupts = <1 0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&max77802_irq>, <&pmic_selb>,
+ <&pmic_dvs_1>, <&pmic_dvs_2>, <&pmic_dvs_3>;
+ wakeup-source;
+ reg = <0x9>;
+ #clock-cells = <1>;
+
+ /* Using idx 1 means warm reset will get good voltage */
+ max77686,pmic-buck-default-dvs-idx = <1>;
+ max77686,pmic-buck-dvs-gpios = <&gpy7 6 GPIO_ACTIVE_HIGH>,
+ <&gpj4 2 GPIO_ACTIVE_HIGH>,
+ <&gpj4 3 GPIO_ACTIVE_HIGH>;
+ max77686,pmic-buck-selb-gpios = <&gph0 2 GPIO_ACTIVE_HIGH>,
+ <&gph0 3 GPIO_ACTIVE_HIGH>,
+ <&gph0 4 GPIO_ACTIVE_HIGH>,
+ <&gph0 5 GPIO_ACTIVE_HIGH>,
+ <&gph0 6 GPIO_ACTIVE_HIGH>;
+
+ inb1-supply = <&tps65090_dcdc2>;
+ inb2-supply = <&tps65090_dcdc1>;
+ inb3-supply = <&tps65090_dcdc2>;
+ inb4-supply = <&tps65090_dcdc2>;
+ inb5-supply = <&tps65090_dcdc1>;
+ inb6-supply = <&tps65090_dcdc2>;
+ inb7-supply = <&tps65090_dcdc1>;
+ inb8-supply = <&tps65090_dcdc1>;
+ inb9-supply = <&tps65090_dcdc1>;
+ inb10-supply = <&tps65090_dcdc1>;
+
+ inl1-supply = <&buck5_reg>;
+ inl2-supply = <&buck7_reg>;
+ inl3-supply = <&buck9_reg>;
+ inl4-supply = <&buck9_reg>;
+ inl5-supply = <&buck9_reg>;
+ inl6-supply = <&tps65090_dcdc2>;
+ inl7-supply = <&buck9_reg>;
+ inl9-supply = <&tps65090_dcdc2>;
+ inl10-supply = <&buck7_reg>;
+
+ regulators {
+ buck1_reg: BUCK1 {
+ regulator-name = "vdd_mif";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <1300000>;
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-ramp-delay = <12500>;
+ };
+
+ buck2_reg: BUCK2 {
+ regulator-name = "vdd_arm_real";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <1500000>;
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-ramp-delay = <12500>;
+ };
+
+ buck3_reg: BUCK3 {
+ regulator-name = "vdd_int_real";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-ramp-delay = <12500>;
+ };
+
+ buck4_reg: BUCK4 {
+ regulator-name = "vdd_g3d";
+ regulator-min-microvolt = <700000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-ramp-delay = <12500>;
+ };
+
+ buck5_reg: BUCK5 {
+ regulator-name = "vdd_1v2";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1200000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ buck6_reg: BUCK6 {
+ regulator-name = "vdd_kfc";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <1500000>;
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-ramp-delay = <12500>;
+ };
+
+ buck7_reg: BUCK7 {
+ regulator-name = "vdd_1v35";
+ regulator-min-microvolt = <1350000>;
+ regulator-max-microvolt = <1350000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ buck8_reg: BUCK8 {
+ regulator-name = "vdd_emmc";
+ regulator-min-microvolt = <2850000>;
+ regulator-max-microvolt = <2850000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ buck9_reg: BUCK9 {
+ regulator-name = "vdd_2v";
+ regulator-min-microvolt = <2000000>;
+ regulator-max-microvolt = <2000000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ buck10_reg: BUCK10 {
+ regulator-name = "vdd_1v8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ ldo1_reg: LDO1 {
+ regulator-name = "vdd_1v0";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1000000>;
+ regulator-always-on;
+ };
+
+ ldo2_reg: LDO2 {
+ regulator-name = "vdd_1v2_2";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1200000>;
+ };
+
+ ldo3_reg: LDO3 {
+ regulator-name = "vdd_1v8_3";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ vqmmc_sdcard: ldo4_reg: LDO4 {
+ regulator-name = "vdd_sd";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <2800000>;
+ regulator-always-on;
+ };
+
+ ldo5_reg: LDO5 {
+ regulator-name = "vdd_1v8_5";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo6_reg: LDO6 {
+ regulator-name = "vdd_1v8_6";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo7_reg: LDO7 {
+ regulator-name = "vdd_1v8_7";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ ldo8_reg: LDO8 {
+ regulator-name = "vdd_ldo8";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1000000>;
+ regulator-always-on;
+ };
+
+ ldo9_reg: LDO9 {
+ regulator-name = "vdd_ldo9";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo10_reg: LDO10 {
+ regulator-name = "vdd_ldo10";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo11_reg: LDO11 {
+ regulator-name = "vdd_ldo11";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo12_reg: LDO12 {
+ regulator-name = "vdd_ldo12";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <3000000>;
+ regulator-always-on;
+ };
+
+ ldo13_reg: LDO13 {
+ regulator-name = "vdd_ldo13";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo14_reg: LDO14 {
+ regulator-name = "vdd_ldo14";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo15_reg: LDO15 {
+ regulator-name = "vdd_ldo15";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1000000>;
+ regulator-always-on;
+ };
+
+ ldo17_reg: LDO17 {
+ regulator-name = "vdd_g3ds";
+ regulator-min-microvolt = <900000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-always-on;
+ };
+
+ ldo18_reg: LDO18 {
+ regulator-name = "ldo_18";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ ldo19_reg: LDO19 {
+ regulator-name = "ldo_19";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ ldo20_reg: LDO20 {
+ regulator-name = "ldo_20";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo21_reg: LDO21 {
+ regulator-name = "ldo_21";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ };
+
+ ldo23_reg: LDO23 {
+ regulator-name = "ldo_23";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ };
+ ldo24_reg: LDO24 {
+ regulator-name = "ldo_24";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ };
+
+ ldo25_reg: LDO25 {
+ regulator-name = "ldo_25";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ ldo26_reg: LDO26 {
+ regulator-name = "ldo_26";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1200000>;
+ };
+
+ ldo27_reg: LDO27 {
+ regulator-name = "ldo_27";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1200000>;
+ };
+
+ ldo28_reg: LDO28 {
+ regulator-name = "ldo_28";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ ldo29_reg: LDO29 {
+ regulator-name = "ldo_29";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ ldo30_reg: LDO30 {
+ regulator-name = "vdd_mifs";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1000000>;
+ regulator-always-on;
+ };
+
+ ldo32_reg: LDO32 {
+ regulator-name = "ldo_32";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <3000000>;
+ };
+
+ ldo33_reg: LDO33 {
+ regulator-name = "ldo_33";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ };
+
+ ldo34_reg: LDO34 {
+ regulator-name = "ldo_34";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <3000000>;
+ };
+
+ ldo35_reg: LDO35 {
+ regulator-name = "ldo_35";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1200000>;
+ inl2-supply = <&buck7_reg>;
+ };
+ };
+ };
+};
+
&hsi2c_7 {
status = "okay";
@@ -264,12 +608,42 @@
samsung,pin-drv = <0>;
};
+ max77802_irq: max77802-irq {
+ samsung,pins = "gpx3-1";
+ samsung,pin-function = <0>;
+ samsung,pin-pud = <0>;
+ samsung,pin-drv = <0>;
+ };
+
hdmi_hpd_irq: hdmi-hpd-irq {
samsung,pins = "gpx3-7";
samsung,pin-function = <0>;
samsung,pin-pud = <1>;
samsung,pin-drv = <0>;
};
+
+ pmic_dvs_1: pmic-dvs-1 {
+ samsung,pins = "gpy7-6";
+ samsung,pin-function = <1>;
+ samsung,pin-pud = <0>;
+ samsung,pin-drv = <0>;
+ };
+};
+
+&pinctrl_2 {
+ pmic_dvs_2: pmic-dvs-2 {
+ samsung,pins = "gpj4-2";
+ samsung,pin-function = <1>;
+ samsung,pin-pud = <0>;
+ samsung,pin-drv = <0>;
+ };
+
+ pmic_dvs_3: pmic-dvs-3 {
+ samsung,pins = "gpj4-3";
+ samsung,pin-function = <1>;
+ samsung,pin-pud = <0>;
+ samsung,pin-drv = <0>;
+ };
};
&pinctrl_3 {
@@ -299,6 +673,14 @@
samsung,pin-pud = <0>;
samsung,pin-drv = <0>;
};
+
+ pmic_selb: pmic-selb {
+ samsung,pins = "gph0-2", "gph0-3", "gph0-4", "gph0-5",
+ "gph0-6";
+ samsung,pin-function = <1>;
+ samsung,pin-pud = <0>;
+ samsung,pin-drv = <0>;
+ };
};
&rtc {
diff --git a/arch/arm/boot/dts/exynos5800-peach-pi.dts b/arch/arm/boot/dts/exynos5800-peach-pi.dts
index 5c60bbe..eba5e47 100644
--- a/arch/arm/boot/dts/exynos5800-peach-pi.dts
+++ b/arch/arm/boot/dts/exynos5800-peach-pi.dts
@@ -141,6 +141,350 @@
ddc = <&i2c_2>;
};
+&hsi2c_4 {
+ status = "okay";
+ clock-frequency = <400000>;
+
+ max77802-pmic@9 {
+ compatible = "maxim,max77802";
+ interrupt-parent = <&gpx3>;
+ interrupts = <1 0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&max77802_irq>, <&pmic_selb>,
+ <&pmic_dvs_1>, <&pmic_dvs_2>, <&pmic_dvs_3>;
+ wakeup-source;
+ reg = <0x9>;
+ #clock-cells = <1>;
+
+ /* Using idx 1 means warm reset will get good voltage */
+ max77686,pmic-buck-default-dvs-idx = <1>;
+ max77686,pmic-buck-dvs-gpios = <&gpy7 6 GPIO_ACTIVE_HIGH>,
+ <&gpj4 2 GPIO_ACTIVE_HIGH>,
+ <&gpj4 3 GPIO_ACTIVE_HIGH>;
+ max77686,pmic-buck-selb-gpios = <&gph0 2 GPIO_ACTIVE_HIGH>,
+ <&gph0 3 GPIO_ACTIVE_HIGH>,
+ <&gph0 4 GPIO_ACTIVE_HIGH>,
+ <&gph0 5 GPIO_ACTIVE_HIGH>,
+ <&gph0 6 GPIO_ACTIVE_HIGH>;
+
+ inb1-supply = <&tps65090_dcdc2>;
+ inb2-supply = <&tps65090_dcdc1>;
+ inb3-supply = <&tps65090_dcdc2>;
+ inb4-supply = <&tps65090_dcdc2>;
+ inb5-supply = <&tps65090_dcdc1>;
+ inb6-supply = <&tps65090_dcdc2>;
+ inb7-supply = <&tps65090_dcdc1>;
+ inb8-supply = <&tps65090_dcdc1>;
+ inb9-supply = <&tps65090_dcdc1>;
+ inb10-supply = <&tps65090_dcdc1>;
+
+ inl1-supply = <&buck5_reg>;
+ inl2-supply = <&buck7_reg>;
+ inl3-supply = <&buck9_reg>;
+ inl4-supply = <&buck9_reg>;
+ inl5-supply = <&buck9_reg>;
+ inl6-supply = <&tps65090_dcdc2>;
+ inl7-supply = <&buck9_reg>;
+ inl9-supply = <&tps65090_dcdc2>;
+ inl10-supply = <&buck7_reg>;
+
+ regulators {
+ buck1_reg: BUCK1 {
+ regulator-name = "vdd_mif";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <1300000>;
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-ramp-delay = <12500>;
+ };
+
+ buck2_reg: BUCK2 {
+ regulator-name = "vdd_arm_real";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <1500000>;
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-ramp-delay = <12500>;
+ };
+
+ buck3_reg: BUCK3 {
+ regulator-name = "vdd_int_real";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-ramp-delay = <12500>;
+ };
+
+ buck4_reg: BUCK4 {
+ regulator-name = "vdd_g3d";
+ regulator-min-microvolt = <700000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-ramp-delay = <12500>;
+ };
+
+ buck5_reg: BUCK5 {
+ regulator-name = "vdd_1v2";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1200000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ buck6_reg: BUCK6 {
+ regulator-name = "vdd_kfc";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <1500000>;
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-ramp-delay = <12500>;
+ };
+
+ buck7_reg: BUCK7 {
+ regulator-name = "vdd_1v35";
+ regulator-min-microvolt = <1350000>;
+ regulator-max-microvolt = <1350000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ buck8_reg: BUCK8 {
+ regulator-name = "vdd_emmc";
+ regulator-min-microvolt = <2850000>;
+ regulator-max-microvolt = <2850000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ buck9_reg: BUCK9 {
+ regulator-name = "vdd_2v";
+ regulator-min-microvolt = <2000000>;
+ regulator-max-microvolt = <2000000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ buck10_reg: BUCK10 {
+ regulator-name = "vdd_1v8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ ldo1_reg: LDO1 {
+ regulator-name = "vdd_1v0";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1000000>;
+ regulator-always-on;
+ };
+
+ ldo2_reg: LDO2 {
+ regulator-name = "vdd_1v2_2";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1200000>;
+ };
+
+ ldo3_reg: LDO3 {
+ regulator-name = "vdd_1v8_3";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ vqmmc_sdcard: ldo4_reg: LDO4 {
+ regulator-name = "vdd_sd";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <2800000>;
+ regulator-always-on;
+ };
+
+ ldo5_reg: LDO5 {
+ regulator-name = "vdd_1v8_5";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo6_reg: LDO6 {
+ regulator-name = "vdd_1v8_6";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo7_reg: LDO7 {
+ regulator-name = "vdd_1v8_7";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ ldo8_reg: LDO8 {
+ regulator-name = "vdd_ldo8";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1000000>;
+ regulator-always-on;
+ };
+
+ ldo9_reg: LDO9 {
+ regulator-name = "vdd_ldo9";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo10_reg: LDO10 {
+ regulator-name = "vdd_ldo10";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo11_reg: LDO11 {
+ regulator-name = "vdd_ldo11";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo12_reg: LDO12 {
+ regulator-name = "vdd_ldo12";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <3000000>;
+ regulator-always-on;
+ };
+
+ ldo13_reg: LDO13 {
+ regulator-name = "vdd_ldo13";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo14_reg: LDO14 {
+ regulator-name = "vdd_ldo14";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo15_reg: LDO15 {
+ regulator-name = "vdd_ldo15";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1000000>;
+ regulator-always-on;
+ };
+
+ ldo17_reg: LDO17 {
+ regulator-name = "vdd_g3ds";
+ regulator-min-microvolt = <900000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-always-on;
+ };
+
+ ldo18_reg: LDO18 {
+ regulator-name = "ldo_18";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ ldo19_reg: LDO19 {
+ regulator-name = "ldo_19";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ ldo20_reg: LDO20 {
+ regulator-name = "ldo_20";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo21_reg: LDO21 {
+ regulator-name = "ldo_21";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ };
+
+ ldo23_reg: LDO23 {
+ regulator-name = "ldo_23";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ };
+ ldo24_reg: LDO24 {
+ regulator-name = "ldo_24";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ };
+
+ ldo25_reg: LDO25 {
+ regulator-name = "ldo_25";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ ldo26_reg: LDO26 {
+ regulator-name = "ldo_26";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1200000>;
+ };
+
+ ldo27_reg: LDO27 {
+ regulator-name = "ldo_27";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1200000>;
+ };
+
+ ldo28_reg: LDO28 {
+ regulator-name = "ldo_28";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ ldo29_reg: LDO29 {
+ regulator-name = "ldo_29";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ ldo30_reg: LDO30 {
+ regulator-name = "vdd_mifs";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1000000>;
+ regulator-always-on;
+ };
+
+ ldo32_reg: LDO32 {
+ regulator-name = "ldo_32";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <3000000>;
+ };
+
+ ldo33_reg: LDO33 {
+ regulator-name = "ldo_33";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ };
+
+ ldo34_reg: LDO34 {
+ regulator-name = "ldo_34";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <3000000>;
+ };
+
+ ldo35_reg: LDO35 {
+ regulator-name = "ldo_35";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1200000>;
+ inl2-supply = <&buck7_reg>;
+ };
+ };
+ };
+};
+
&hsi2c_7 {
status = "okay";
@@ -262,12 +606,42 @@
samsung,pin-drv = <0>;
};
+ max77802_irq: max77802-irq {
+ samsung,pins = "gpx3-1";
+ samsung,pin-function = <0>;
+ samsung,pin-pud = <0>;
+ samsung,pin-drv = <0>;
+ };
+
hdmi_hpd_irq: hdmi-hpd-irq {
samsung,pins = "gpx3-7";
samsung,pin-function = <0>;
samsung,pin-pud = <1>;
samsung,pin-drv = <0>;
};
+
+ pmic_dvs_1: pmic-dvs-1 {
+ samsung,pins = "gpy7-6";
+ samsung,pin-function = <1>;
+ samsung,pin-pud = <0>;
+ samsung,pin-drv = <0>;
+ };
+};
+
+&pinctrl_2 {
+ pmic_dvs_2: pmic-dvs-2 {
+ samsung,pins = "gpj4-2";
+ samsung,pin-function = <1>;
+ samsung,pin-pud = <0>;
+ samsung,pin-drv = <0>;
+ };
+
+ pmic_dvs_3: pmic-dvs-3 {
+ samsung,pins = "gpj4-3";
+ samsung,pin-function = <1>;
+ samsung,pin-pud = <0>;
+ samsung,pin-drv = <0>;
+ };
};
&pinctrl_3 {
@@ -297,6 +671,14 @@
samsung,pin-pud = <0>;
samsung,pin-drv = <0>;
};
+
+ pmic_selb: pmic-selb {
+ samsung,pins = "gph0-2", "gph0-3", "gph0-4", "gph0-5",
+ "gph0-6";
+ samsung,pin-function = <1>;
+ samsung,pin-pud = <0>;
+ samsung,pin-drv = <0>;
+ };
};
&rtc {
--
2.0.0.rc2
Add Device Tree binding documentation for the clocks
outputs in the Maxim 77802 Power Management IC.
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
Changes since v6: None
Changes since v5:
- Fix typo error in DT binding. Suggested by Andreas Farber.
- Add "clock-output-names" as an optional property since now is supported.
Changes since v4: None
Changes since v3:
- Don't use the same clock driver name in clock-names since it's a consumer
concept and most probably will be different. Suggested by Doug Anderson.
Changes since v2:
- Split the DT binding documentation in a separate patch.
---
.../devicetree/bindings/clock/maxim,max77802.txt | 44 ++++++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/maxim,max77802.txt
diff --git a/Documentation/devicetree/bindings/clock/maxim,max77802.txt b/Documentation/devicetree/bindings/clock/maxim,max77802.txt
new file mode 100644
index 0000000..c6dc783
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/maxim,max77802.txt
@@ -0,0 +1,44 @@
+Binding for Maxim MAX77802 32k clock generator block
+
+This is a part of device tree bindings of MAX77802 multi-function device.
+More information can be found in bindings/mfd/max77802.txt file.
+
+The MAX77802 contains two 32.768khz clock outputs that can be controlled
+(gated/ungated) over I2C.
+
+Following properties should be present in main device node of the MFD chip.
+
+Required properties:
+- #clock-cells: From common clock binding; shall be set to 1.
+
+Optional properties:
+- clock-output-names: From common clock binding.
+
+Each clock is assigned an identifier and client nodes can use this identifier
+to specify the clock which they consume. Following indices are allowed:
+ - 0: 32khz_ap clock,
+ - 1: 32khz_cp clock.
+
+Clocks are defined as preprocessor macros in dt-bindings/clock/maxim,max77802.h
+header and can be used in device tree sources.
+
+Example: Node of the MFD chip
+
+ max77802: max77802@09 {
+ compatible = "maxim,max77802";
+ interrupt-parent = <&wakeup_eint>;
+ interrupts = <26 0>;
+ reg = <0x09>;
+ #clock-cells = <1>;
+
+ /* ... */
+ };
+
+Example: Clock consumer node
+
+ foo@0 {
+ compatible = "bar,foo";
+ /* ... */
+ clock-names = "my-clock";
+ clocks = <&max77802 MAX77802_CLK_32K_AP>;
+ };
--
2.0.0.rc2
The MAX77802 PMIC has two 32.768kHz Buffered Clock Outputs with
Low Jitter Mode. This patch adds support for these two clocks.
Signed-off-by: Javier Martinez Canillas <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
---
Changes since v6: None
Changes since v5: None
Changes since v4: None
Changes since v3: None
Changes since v2: None
Changes since v1:
- Use module_platform_driver() instead of having init/exit functions.
Suggested by Mark Brown.
- Use the generic maxim clock driver to reduce code duplication with
clk-max77686.c driver.
---
drivers/clk/Kconfig | 7 +++
drivers/clk/Makefile | 1 +
drivers/clk/clk-max77802.c | 98 ++++++++++++++++++++++++++++++
include/dt-bindings/clock/maxim,max77802.h | 22 +++++++
4 files changed, 128 insertions(+)
create mode 100644 drivers/clk/clk-max77802.c
create mode 100644 include/dt-bindings/clock/maxim,max77802.h
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 3fd4270..8808f2a 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -42,6 +42,13 @@ config COMMON_CLK_MAX77686
---help---
This driver supports Maxim 77686 crystal oscillator clock.
+config COMMON_CLK_MAX77802
+ tristate "Clock driver for Maxim 77802 PMIC"
+ depends on MFD_MAX77686
+ select COMMON_CLK_MAX_GEN
+ ---help---
+ This driver supports Maxim 77802 crystal oscillator clock.
+
config COMMON_CLK_SI5351
tristate "Clock driver for SiLabs 5351A/B/C"
depends on I2C
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 6c1aff6..520ff76 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o
obj-$(CONFIG_MACH_LOONGSON1) += clk-ls1x.o
obj-$(CONFIG_COMMON_CLK_MAX_GEN) += clk-max-gen.o
obj-$(CONFIG_COMMON_CLK_MAX77686) += clk-max77686.o
+obj-$(CONFIG_COMMON_CLK_MAX77802) += clk-max77802.o
obj-$(CONFIG_ARCH_MOXART) += clk-moxart.o
obj-$(CONFIG_ARCH_NOMADIK) += clk-nomadik.o
obj-$(CONFIG_ARCH_NSPIRE) += clk-nspire.o
diff --git a/drivers/clk/clk-max77802.c b/drivers/clk/clk-max77802.c
new file mode 100644
index 0000000..8e480c5
--- /dev/null
+++ b/drivers/clk/clk-max77802.c
@@ -0,0 +1,98 @@
+/*
+ * clk-max77802.c - Clock driver for Maxim 77802
+ *
+ * Copyright (C) 2014 Google, Inc
+ *
+ * Copyright (C) 2012 Samsung Electornics
+ * Jonghwa Lee <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * This driver is based on clk-max77686.c
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/max77686-private.h>
+#include <linux/clk-provider.h>
+#include <linux/mutex.h>
+#include <linux/clkdev.h>
+
+#include <dt-bindings/clock/maxim,max77802.h>
+#include "clk-max-gen.h"
+
+#define MAX77802_CLOCK_OPMODE_MASK 0x1
+#define MAX77802_CLOCK_LOW_JITTER_SHIFT 0x3
+
+static struct clk_init_data max77802_clks_init[MAX77802_CLKS_NUM] = {
+ [MAX77802_CLK_32K_AP] = {
+ .name = "32khz_ap",
+ .ops = &max_gen_clk_ops,
+ .flags = CLK_IS_ROOT,
+ },
+ [MAX77802_CLK_32K_CP] = {
+ .name = "32khz_cp",
+ .ops = &max_gen_clk_ops,
+ .flags = CLK_IS_ROOT,
+ },
+};
+
+static int max77802_clk_probe(struct platform_device *pdev)
+{
+ struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ int ret;
+
+ ret = max_gen_clk_probe(pdev, iodev->regmap, MAX77802_REG_32KHZ,
+ max77802_clks_init, MAX77802_CLKS_NUM);
+
+ if (ret) {
+ dev_err(&pdev->dev, "generic probe failed %d\n", ret);
+ return ret;
+ }
+
+ /* Enable low-jitter mode on the 32khz clocks. */
+ ret = regmap_update_bits(iodev->regmap, MAX77802_REG_32KHZ,
+ 1 << MAX77802_CLOCK_LOW_JITTER_SHIFT,
+ 1 << MAX77802_CLOCK_LOW_JITTER_SHIFT);
+ if (ret < 0)
+ dev_err(&pdev->dev, "failed to enable low-jitter mode\n");
+
+ return ret;
+}
+
+static int max77802_clk_remove(struct platform_device *pdev)
+{
+ return max_gen_clk_remove(pdev, MAX77802_CLKS_NUM);
+}
+
+static const struct platform_device_id max77802_clk_id[] = {
+ { "max77802-clk", 0},
+ { },
+};
+MODULE_DEVICE_TABLE(platform, max77802_clk_id);
+
+static struct platform_driver max77802_clk_driver = {
+ .driver = {
+ .name = "max77802-clk",
+ .owner = THIS_MODULE,
+ },
+ .probe = max77802_clk_probe,
+ .remove = max77802_clk_remove,
+ .id_table = max77802_clk_id,
+};
+
+module_platform_driver(max77802_clk_driver);
+
+MODULE_DESCRIPTION("MAXIM 77802 Clock Driver");
+MODULE_AUTHOR("Javier Martinez Canillas <[email protected]>");
+MODULE_LICENSE("GPL");
diff --git a/include/dt-bindings/clock/maxim,max77802.h b/include/dt-bindings/clock/maxim,max77802.h
new file mode 100644
index 0000000..997312e
--- /dev/null
+++ b/include/dt-bindings/clock/maxim,max77802.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2014 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Device Tree binding constants clocks for the Maxim 77802 PMIC.
+ */
+
+#ifndef _DT_BINDINGS_CLOCK_MAXIM_MAX77802_CLOCK_H
+#define _DT_BINDINGS_CLOCK_MAXIM_MAX77802_CLOCK_H
+
+/* Fixed rate clocks. */
+
+#define MAX77802_CLK_32K_AP 0
+#define MAX77802_CLK_32K_CP 1
+
+/* Total number of clocks. */
+#define MAX77802_CLKS_NUM (MAX77802_CLK_32K_CP + 1)
+
+#endif /* _DT_BINDINGS_CLOCK_MAXIM_MAX77802_CLOCK_H */
--
2.0.0.rc2
Some device drivers using the register map API need to copy the
value from one register to another. Even though it can be done
with a combination of regmap_read() and regmap_write(), it is
better to have a function to avoid code duplication and also it
sanity check and do it atomically by holding the regmap lock.
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
drivers/base/regmap/regmap.c | 34 ++++++++++++++++++++++++++++++++++
include/linux/regmap.h | 9 +++++++++
2 files changed, 43 insertions(+)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 74d8c06..a2e0b04 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -2555,6 +2555,40 @@ int regmap_parse_val(struct regmap *map, const void *buf,
}
EXPORT_SYMBOL_GPL(regmap_parse_val);
+/**
+ * regmap_reg_copy(): Copy a value from a single register to another one
+ *
+ * @map: Register map to operate on
+ * @dest: Register to copy the value to
+ * @src: Register to copy the value from
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_reg_copy(struct regmap *map, unsigned int dest, unsigned int src)
+{
+ int val;
+ int ret = 0;
+
+ if (dest == src)
+ return ret;
+
+ if (dest % map->reg_stride ||
+ src % map->reg_stride)
+ return -EINVAL;
+
+ map->lock(map->lock_arg);
+
+ ret = _regmap_read(map, src, &val);
+ if (!ret)
+ ret = _regmap_write(map, dest, val);
+
+ map->unlock(map->lock_arg);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_reg_copy);
+
static int __init regmap_initcall(void)
{
regmap_debugfs_initcall();
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 7b0e4b4..116c22b 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -445,6 +445,8 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
int regmap_parse_val(struct regmap *map, const void *buf,
unsigned int *val);
+int regmap_reg_copy(struct regmap *map, unsigned int dest, unsigned int src);
+
static inline bool regmap_reg_in_range(unsigned int reg,
const struct regmap_range *range)
{
@@ -723,6 +725,13 @@ static inline int regmap_parse_val(struct regmap *map, const void *buf,
return -EINVAL;
}
+static inline int regmap_reg_copy(struct regmap *map, unsigned int dest,
+ unsigned int src)
+{
+ WARN_ONCE(1, "regmap API is disabled");
+ return -EINVAL;
+}
+
static inline struct regmap *dev_get_regmap(struct device *dev,
const char *name)
{
--
2.0.0.rc2
MAX77686 PMIC support Dyamic Voltage Scaling (DVS) on a set
of Buck regulators. A number of GPIO are connected to these
lines and are requested by the mfd driver. Setup the GPIO
pins from the regulator driver.
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
drivers/regulator/max77686.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/drivers/regulator/max77686.c b/drivers/regulator/max77686.c
index ef1af2d..ecce77a 100644
--- a/drivers/regulator/max77686.c
+++ b/drivers/regulator/max77686.c
@@ -435,6 +435,12 @@ static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
}
#endif /* CONFIG_OF */
+static inline bool max77686_is_dvs_buck(int id)
+{
+ /* BUCK 2,3 and 4 support DVS */
+ return (id >= MAX77686_BUCK2 && id <= MAX77686_BUCK4);
+}
+
static int max77686_pmic_probe(struct platform_device *pdev)
{
struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
@@ -442,6 +448,9 @@ static int max77686_pmic_probe(struct platform_device *pdev)
struct max77686_data *max77686;
int i, ret = 0;
struct regulator_config config = { };
+ unsigned int reg;
+ int buck_default_idx;
+ int buck_old_idx;
dev_dbg(&pdev->dev, "%s\n", __func__);
@@ -472,13 +481,34 @@ static int max77686_pmic_probe(struct platform_device *pdev)
config.driver_data = max77686;
platform_set_drvdata(pdev, max77686);
+ buck_default_idx = pdata->buck_default_idx;
+ buck_old_idx = max77686_read_gpios(pdata);
+
for (i = 0; i < MAX77686_REGULATORS; i++) {
struct regulator_dev *rdev;
+ int id = pdata->regulators[i].id;
config.init_data = pdata->regulators[i].initdata;
config.of_node = pdata->regulators[i].of_node;
max77686->opmode[i] = regulators[i].enable_mask;
+
+ if (max77686_is_dvs_buck(id)) {
+ /* Try to copy over data so we keep firmware settings */
+ reg = regulators[i].vsel_reg;
+
+ ret = regmap_reg_copy(iodev->regmap,
+ reg + buck_default_idx,
+ reg + buck_old_idx);
+
+ if (ret)
+ dev_warn(&pdev->dev, "Copy err %d => %d (%d)\n",
+ reg + buck_old_idx,
+ reg + buck_default_idx, ret);
+
+ regulators[i].vsel_reg += buck_default_idx;
+ }
+
rdev = devm_regulator_register(&pdev->dev,
®ulators[i], &config);
if (IS_ERR(rdev)) {
@@ -488,6 +518,10 @@ static int max77686_pmic_probe(struct platform_device *pdev)
}
}
+ ret = max77686_setup_gpios(iodev->dev);
+ if (ret)
+ return ret;
+
return 0;
}
--
2.0.0.rc2
Clocks drivers for Maxim PMIC are very similar so they can
be converted to use the generic Maxim clock driver.
Also, while being there use module_platform_driver() helper
macro to eliminate more boilerplate code.
Signed-off-by: Javier Martinez Canillas <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
---
drivers/clk/Kconfig | 1 +
drivers/clk/clk-max77686.c | 176 +++------------------------------------------
2 files changed, 9 insertions(+), 168 deletions(-)
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 73f78e8..3fd4270 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -38,6 +38,7 @@ config COMMON_CLK_MAX_GEN
config COMMON_CLK_MAX77686
tristate "Clock driver for Maxim 77686 MFD"
depends on MFD_MAX77686
+ select COMMON_CLK_MAX_GEN
---help---
This driver supports Maxim 77686 crystal oscillator clock.
diff --git a/drivers/clk/clk-max77686.c b/drivers/clk/clk-max77686.c
index 185b611..ed0beb4 100644
--- a/drivers/clk/clk-max77686.c
+++ b/drivers/clk/clk-max77686.c
@@ -31,187 +31,37 @@
#include <linux/clkdev.h>
#include <dt-bindings/clock/maxim,max77686.h>
-
-struct max77686_clk {
- struct max77686_dev *iodev;
- u32 mask;
- struct clk_hw hw;
- struct clk_lookup *lookup;
-};
-
-static struct max77686_clk *to_max77686_clk(struct clk_hw *hw)
-{
- return container_of(hw, struct max77686_clk, hw);
-}
-
-static int max77686_clk_prepare(struct clk_hw *hw)
-{
- struct max77686_clk *max77686 = to_max77686_clk(hw);
-
- return regmap_update_bits(max77686->iodev->regmap,
- MAX77686_REG_32KHZ, max77686->mask,
- max77686->mask);
-}
-
-static void max77686_clk_unprepare(struct clk_hw *hw)
-{
- struct max77686_clk *max77686 = to_max77686_clk(hw);
-
- regmap_update_bits(max77686->iodev->regmap,
- MAX77686_REG_32KHZ, max77686->mask, ~max77686->mask);
-}
-
-static int max77686_clk_is_prepared(struct clk_hw *hw)
-{
- struct max77686_clk *max77686 = to_max77686_clk(hw);
- int ret;
- u32 val;
-
- ret = regmap_read(max77686->iodev->regmap,
- MAX77686_REG_32KHZ, &val);
-
- if (ret < 0)
- return -EINVAL;
-
- return val & max77686->mask;
-}
-
-static unsigned long max77686_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- return 32768;
-}
-
-static struct clk_ops max77686_clk_ops = {
- .prepare = max77686_clk_prepare,
- .unprepare = max77686_clk_unprepare,
- .is_prepared = max77686_clk_is_prepared,
- .recalc_rate = max77686_recalc_rate,
-};
+#include "clk-max-gen.h"
static struct clk_init_data max77686_clks_init[MAX77686_CLKS_NUM] = {
[MAX77686_CLK_AP] = {
.name = "32khz_ap",
- .ops = &max77686_clk_ops,
+ .ops = &max_gen_clk_ops,
.flags = CLK_IS_ROOT,
},
[MAX77686_CLK_CP] = {
.name = "32khz_cp",
- .ops = &max77686_clk_ops,
+ .ops = &max_gen_clk_ops,
.flags = CLK_IS_ROOT,
},
[MAX77686_CLK_PMIC] = {
.name = "32khz_pmic",
- .ops = &max77686_clk_ops,
+ .ops = &max_gen_clk_ops,
.flags = CLK_IS_ROOT,
},
};
-static struct clk *max77686_clk_register(struct device *dev,
- struct max77686_clk *max77686)
-{
- struct clk *clk;
- struct clk_hw *hw = &max77686->hw;
-
- clk = clk_register(dev, hw);
- if (IS_ERR(clk))
- return clk;
-
- max77686->lookup = kzalloc(sizeof(struct clk_lookup), GFP_KERNEL);
- if (!max77686->lookup)
- return ERR_PTR(-ENOMEM);
-
- max77686->lookup->con_id = hw->init->name;
- max77686->lookup->clk = clk;
-
- clkdev_add(max77686->lookup);
-
- return clk;
-}
-
static int max77686_clk_probe(struct platform_device *pdev)
{
struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
- struct max77686_clk *max77686_clks[MAX77686_CLKS_NUM];
- struct clk **clocks;
- int i, ret;
-
- clocks = devm_kzalloc(&pdev->dev, sizeof(struct clk *)
- * MAX77686_CLKS_NUM, GFP_KERNEL);
- if (!clocks)
- return -ENOMEM;
-
- for (i = 0; i < MAX77686_CLKS_NUM; i++) {
- max77686_clks[i] = devm_kzalloc(&pdev->dev,
- sizeof(struct max77686_clk), GFP_KERNEL);
- if (!max77686_clks[i])
- return -ENOMEM;
- }
-
- for (i = 0; i < MAX77686_CLKS_NUM; i++) {
- max77686_clks[i]->iodev = iodev;
- max77686_clks[i]->mask = 1 << i;
- max77686_clks[i]->hw.init = &max77686_clks_init[i];
-
- clocks[i] = max77686_clk_register(&pdev->dev, max77686_clks[i]);
- if (IS_ERR(clocks[i])) {
- ret = PTR_ERR(clocks[i]);
- dev_err(&pdev->dev, "failed to register %s\n",
- max77686_clks[i]->hw.init->name);
- goto err_clocks;
- }
- }
-
- platform_set_drvdata(pdev, clocks);
-
- if (iodev->dev->of_node) {
- struct clk_onecell_data *of_data;
-
- of_data = devm_kzalloc(&pdev->dev,
- sizeof(*of_data), GFP_KERNEL);
- if (!of_data) {
- ret = -ENOMEM;
- goto err_clocks;
- }
- of_data->clks = clocks;
- of_data->clk_num = MAX77686_CLKS_NUM;
- ret = of_clk_add_provider(iodev->dev->of_node,
- of_clk_src_onecell_get, of_data);
- if (ret) {
- dev_err(&pdev->dev, "failed to register OF clock provider\n");
- goto err_clocks;
- }
- }
-
- return 0;
-
-err_clocks:
- for (--i; i >= 0; --i) {
- clkdev_drop(max77686_clks[i]->lookup);
- clk_unregister(max77686_clks[i]->hw.clk);
- }
-
- return ret;
+ return max_gen_clk_probe(pdev, iodev->regmap, MAX77686_REG_32KHZ,
+ max77686_clks_init, MAX77686_CLKS_NUM);
}
static int max77686_clk_remove(struct platform_device *pdev)
{
- struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
- struct clk **clocks = platform_get_drvdata(pdev);
- int i;
-
- if (iodev->dev->of_node)
- of_clk_del_provider(iodev->dev->of_node);
-
- for (i = 0; i < MAX77686_CLKS_NUM; i++) {
- struct clk_hw *hw = __clk_get_hw(clocks[i]);
- struct max77686_clk *max77686 = to_max77686_clk(hw);
-
- clkdev_drop(max77686->lookup);
- clk_unregister(clocks[i]);
- }
- return 0;
+ return max_gen_clk_remove(pdev, MAX77686_CLKS_NUM);
}
static const struct platform_device_id max77686_clk_id[] = {
@@ -230,17 +80,7 @@ static struct platform_driver max77686_clk_driver = {
.id_table = max77686_clk_id,
};
-static int __init max77686_clk_init(void)
-{
- return platform_driver_register(&max77686_clk_driver);
-}
-subsys_initcall(max77686_clk_init);
-
-static void __init max77686_clk_cleanup(void)
-{
- platform_driver_unregister(&max77686_clk_driver);
-}
-module_exit(max77686_clk_cleanup);
+module_platform_driver(max77686_clk_driver);
MODULE_DESCRIPTION("MAXIM 77686 Clock Driver");
MODULE_AUTHOR("Jonghwa Lee <[email protected]>");
--
2.0.0.rc2
From: Doug Anderson <[email protected]>
The max77686 includes an RTC that keeps power during suspend. It's
convenient to be able to use it as a wakeup source.
NOTE: due to wakeup ordering problems this patch alone doesn't work so
well on exynos5250-snow. You also need something that brings the i2c
bus up before the max77686 wakeup runs.
Signed-off-by: Doug Anderson <[email protected]>
Reviewed-by: Javier Martinez Canillas <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
---
Changes since v6: None
Changes since v5:
- Fix $SUBJECT since the patch does not actually touch the mfd subsys.
Suggested by Lee Jones.
Changes since v4: None
Changes since v3:
- Keep the note that this patch needs another change due wakeup
ordering problems.
---
drivers/rtc/rtc-max77686.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index d20a7f0..c1c6055 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -583,6 +583,33 @@ static void max77686_rtc_shutdown(struct platform_device *pdev)
#endif /* MAX77686_RTC_WTSR_SMPL */
}
+#ifdef CONFIG_PM_SLEEP
+static int max77686_rtc_suspend(struct device *dev)
+{
+ if (device_may_wakeup(dev)) {
+ struct max77686_rtc_info *info = dev_get_drvdata(dev);
+
+ return enable_irq_wake(info->virq);
+ }
+
+ return 0;
+}
+
+static int max77686_rtc_resume(struct device *dev)
+{
+ if (device_may_wakeup(dev)) {
+ struct max77686_rtc_info *info = dev_get_drvdata(dev);
+
+ return disable_irq_wake(info->virq);
+ }
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(max77686_rtc_pm_ops,
+ max77686_rtc_suspend, max77686_rtc_resume);
+
static const struct platform_device_id rtc_id[] = {
{ "max77686-rtc", 0 },
{},
@@ -592,6 +619,7 @@ static struct platform_driver max77686_rtc_driver = {
.driver = {
.name = "max77686-rtc",
.owner = THIS_MODULE,
+ .pm = &max77686_rtc_pm_ops,
},
.probe = max77686_rtc_probe,
.shutdown = max77686_rtc_shutdown,
--
2.0.0.rc2
This patch adds a dt-binding include for Maxim 77686
PMIC clock IDs that can be used by both the max77686
clock driver and Device Tree source files.
Signed-off-by: Javier Martinez Canillas <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Mike Turquette <[email protected]>
---
Changes since v6: None
Changes since v5:
- Improve wording in commit message. Suggested by Andreas Farber.
Changes since v4: None
Changes since v3:
- Keep the note that this patch needs another change due wakeup
ordering problems.
---
drivers/clk/clk-max77686.c | 7 +------
include/dt-bindings/clock/maxim,max77686.h | 23 +++++++++++++++++++++++
2 files changed, 24 insertions(+), 6 deletions(-)
create mode 100644 include/dt-bindings/clock/maxim,max77686.h
diff --git a/drivers/clk/clk-max77686.c b/drivers/clk/clk-max77686.c
index 3d7e8dd..185b611 100644
--- a/drivers/clk/clk-max77686.c
+++ b/drivers/clk/clk-max77686.c
@@ -30,12 +30,7 @@
#include <linux/mutex.h>
#include <linux/clkdev.h>
-enum {
- MAX77686_CLK_AP = 0,
- MAX77686_CLK_CP,
- MAX77686_CLK_PMIC,
- MAX77686_CLKS_NUM,
-};
+#include <dt-bindings/clock/maxim,max77686.h>
struct max77686_clk {
struct max77686_dev *iodev;
diff --git a/include/dt-bindings/clock/maxim,max77686.h b/include/dt-bindings/clock/maxim,max77686.h
new file mode 100644
index 0000000..7b28b09
--- /dev/null
+++ b/include/dt-bindings/clock/maxim,max77686.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2014 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Device Tree binding constants clocks for the Maxim 77686 PMIC.
+ */
+
+#ifndef _DT_BINDINGS_CLOCK_MAXIM_MAX77686_CLOCK_H
+#define _DT_BINDINGS_CLOCK_MAXIM_MAX77686_CLOCK_H
+
+/* Fixed rate clocks. */
+
+#define MAX77686_CLK_AP 0
+#define MAX77686_CLK_CP 1
+#define MAX77686_CLK_PMIC 2
+
+/* Total number of clocks. */
+#define MAX77686_CLKS_NUM (MAX77686_CLK_PMIC + 1)
+
+#endif /* _DT_BINDINGS_CLOCK_MAXIM_MAX77686_CLOCK_H */
--
2.0.0.rc2
Some regulators on the MAX77686 PMIC have Dynamic Voltage Scaling
(DVS) support that allows output voltage to change dynamically.
For MAX77686, these regulators are Buck regulators 2, 3 and 4.
Each Buck output voltage is selected using a set of external
inputs: DVS1-3 and SELB2-4.
DVS registers can be used to configure the output voltages for each
Buck regulator and which one is active is controled by DVSx lines.
SELBx lines are used to control if individual Buck lines are ON or OFF.
This patch adds support to configure the DVSx and SELBx lines
from DT and to setup and read the GPIO lines connected to them.
Signed-off-by: Javier Martinez Canillas <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
---
Changes since v6:
- Add a comment that max77686_read_gpios() function can sleep.
Sugggested by Krzysztof Kozlowski
---
drivers/mfd/max77686.c | 119 +++++++++++++++++++++++++++++++++++++++++++
include/linux/mfd/max77686.h | 18 ++++---
2 files changed, 129 insertions(+), 8 deletions(-)
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index 8650832..d193873 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -32,8 +32,10 @@
#include <linux/mfd/core.h>
#include <linux/mfd/max77686.h>
#include <linux/mfd/max77686-private.h>
+#include <linux/gpio/consumer.h>
#include <linux/err.h>
#include <linux/of.h>
+#include <linux/export.h>
#define I2C_ADDR_RTC (0x0C >> 1)
@@ -101,9 +103,119 @@ static const struct of_device_id max77686_pmic_dt_match[] = {
{},
};
+static void max77686_dt_parse_dvs_gpio(struct device *dev)
+{
+ struct max77686_platform_data *pd = dev_get_platdata(dev);
+ int i;
+
+ /*
+ * NOTE: we don't consider GPIO errors fatal; board may have some lines
+ * directly pulled high or low and thus doesn't specify them.
+ */
+ for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++)
+ pd->buck_gpio_dvs[i] =
+ devm_gpiod_get_index(dev, "max77686,pmic-buck-dvs", i);
+
+ for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++)
+ pd->buck_gpio_selb[i] =
+ devm_gpiod_get_index(dev, "max77686,pmic-buck-selb", i);
+}
+
+/**
+ * max77686_setup_gpios() - init DVS-related GPIOs
+ * @dev: device whose platform data contains the dvs GPIOs information
+ *
+ * This function claims / initalizations GPIOs related to DVS if they are
+ * defined. This may have the effect of switching voltages if the
+ * pdata->buck_default_idx does not match the boot time state of pins.
+ */
+int max77686_setup_gpios(struct device *dev)
+{
+ struct max77686_platform_data *pd = dev_get_platdata(dev);
+ int buck_default_idx = pd->buck_default_idx;
+ int ret;
+ int i;
+
+ /* Set all SELB high to avoid glitching while DVS is changing */
+ for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
+ struct gpio_desc *gpio = pd->buck_gpio_selb[i];
+
+ /* OK if some GPIOs aren't defined */
+ if (IS_ERR(gpio))
+ continue;
+
+ ret = gpiod_direction_output_raw(gpio, 1);
+ if (ret) {
+ dev_err(dev, "can't set gpio[%d] dir: %d\n", i, ret);
+ return ret;
+ }
+ }
+
+ /* Set our initial setting */
+ for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++) {
+ struct gpio_desc *gpio = pd->buck_gpio_dvs[i];
+
+ /* OK if some GPIOs aren't defined */
+ if (IS_ERR(gpio))
+ continue;
+
+ /* If a GPIO is valid, set it */
+ gpiod_direction_output(gpio, (buck_default_idx >> i) & 1);
+ if (ret) {
+ dev_err(dev, "can't set gpio[%d]: dir %d\n", i, ret);
+ return ret;
+ }
+ }
+
+ /* Now set SELB low to take effect */
+ for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
+ struct gpio_desc *gpio = pd->buck_gpio_selb[i];
+
+ if (!IS_ERR(gpio))
+ gpiod_set_value(gpio, 0);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(max77686_setup_gpios);
+
+/**
+ * max77686_read_gpios() - read the current state of the dvs GPIOs
+ * @pdata: platform data that contains the dvs GPIOs information
+ *
+ * We call this function at bootup to detect what slot the firmware was
+ * using for the DVS GPIOs. That way we can properly preserve the firmware's
+ * voltage settings
+ *
+ * This function can sleep so must not be called from atomic context.
+ */
+int max77686_read_gpios(struct max77686_platform_data *pdata)
+{
+ int buck_default_idx = pdata->buck_default_idx;
+ int result = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(pdata->buck_gpio_dvs); i++) {
+ struct gpio_desc *gpio = pdata->buck_gpio_dvs[i];
+
+ /* OK if some GPIOs aren't defined; we'll use default */
+ if (IS_ERR(gpio)) {
+ result |= buck_default_idx & (1 << i);
+ continue;
+ }
+
+ if (gpiod_get_value_cansleep(gpio))
+ result |= 1 << i;
+ }
+
+ return result;
+}
+EXPORT_SYMBOL_GPL(max77686_read_gpios);
+
static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
*dev)
{
+ struct device_node *np = dev->of_node;
struct max77686_platform_data *pd;
pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
@@ -111,6 +223,13 @@ static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
return NULL;
dev->platform_data = pd;
+
+ /* Read default index and ignore errors, since default is 0 */
+ of_property_read_u32(np, "max77686,pmic-buck-default-dvs-idx",
+ &pd->buck_default_idx);
+
+ max77686_dt_parse_dvs_gpio(dev);
+
return pd;
}
diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
index 4cbcc13..46a736b 100644
--- a/include/linux/mfd/max77686.h
+++ b/include/linux/mfd/max77686.h
@@ -99,15 +99,17 @@ struct max77686_platform_data {
struct max77686_opmode_data *opmode_data;
/*
- * GPIO-DVS feature is not enabled with the current version of
- * MAX77686 driver. Buck2/3/4_voltages[0] is used as the default
- * voltage at probe. DVS/SELB gpios are set as OUTPUT-LOW.
+ * GPIO-DVS feature is not fully enabled with the current version of
+ * MAX77686 driver, but the driver does support using a DVS index other
+ * than the default of 0.
*/
- int buck234_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
- int buck234_gpio_selb[3]; /* [0]SELB2, [1]SELB3, [2]SELB4 */
- unsigned int buck2_voltage[8]; /* buckx_voltage in uV */
- unsigned int buck3_voltage[8];
- unsigned int buck4_voltage[8];
+ struct gpio_desc *buck_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
+ int buck_default_idx; /* Default value of DVS1, 2, 3 */
+
+ struct gpio_desc *buck_gpio_selb[3]; /* Buck regulators 2, 3, 4 */
};
+extern int max77686_setup_gpios(struct device *dev);
+extern int max77686_read_gpios(struct max77686_platform_data *pdata);
+
#endif /* __LINUX_MFD_MAX77686_H */
--
2.0.0.rc2
Error checking across the driver is mostly consistent besides
a few exceptions, so change these exceptions for consistency.
Signed-off-by: Javier Martinez Canillas <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
---
drivers/mfd/max77686.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index ada4976..87fe52e 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -134,7 +134,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
max77686 = devm_kzalloc(&i2c->dev,
sizeof(struct max77686_dev), GFP_KERNEL);
- if (max77686 == NULL)
+ if (!max77686)
return -ENOMEM;
i2c_set_clientdata(i2c, max77686);
@@ -153,8 +153,8 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
return ret;
}
- if (regmap_read(max77686->regmap,
- MAX77686_REG_DEVICE_ID, &data) < 0) {
+ ret = regmap_read(max77686->regmap, MAX77686_REG_DEVICE_ID, &data);
+ if (ret < 0) {
dev_err(max77686->dev,
"device not found on this channel (this is not an error)\n");
return -ENODEV;
@@ -180,7 +180,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
IRQF_SHARED, 0, &max77686_irq_chip,
&max77686->irq_data);
- if (ret != 0) {
+ if (ret) {
dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
goto err_unregister_i2c;
}
@@ -188,7 +188,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
IRQF_SHARED, 0, &max77686_rtc_irq_chip,
&max77686->rtc_irq_data);
- if (ret != 0) {
+ if (ret) {
dev_err(&i2c->dev, "failed to add RTC irq chip: %d\n", ret);
goto err_del_irqc;
}
--
2.0.0.rc2
The function max77802_i2c_parse_dt_pdata() should only be called
if there isn't already platform data for the device.
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
drivers/mfd/max77686.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index d1f9d04..12d4c17 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -124,7 +124,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
unsigned int data;
int ret = 0;
- if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node)
+ if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node && !pdata)
pdata = max77686_i2c_parse_dt_pdata(&i2c->dev);
if (!pdata) {
--
2.0.0.rc2
The driver doesn't have PM operations defined so add a suspend
and resume function handlers to allow the PMIC IRQ to wakeup
the system when it is put into a sleep state.
Signed-off-by: Javier Martinez Canillas <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
---
drivers/mfd/max77686.c | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index 3cb41d0..a38e9ee 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -240,10 +240,50 @@ static const struct i2c_device_id max77686_i2c_id[] = {
};
MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);
+#ifdef CONFIG_PM_SLEEP
+static int max77686_suspend(struct device *dev)
+{
+ struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+ struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(max77686->irq);
+
+ /*
+ * IRQ must be disabled during suspend because if it happens
+ * while suspended it will be handled before resuming I2C.
+ *
+ * When device is woken up from suspend (e.g. by RTC wake alarm),
+ * an interrupt occurs before resuming I2C bus controller.
+ * Interrupt handler tries to read registers but this read
+ * will fail because I2C is still suspended.
+ */
+ disable_irq(max77686->irq);
+
+ return 0;
+}
+
+static int max77686_resume(struct device *dev)
+{
+ struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+ struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(max77686->irq);
+
+ enable_irq(max77686->irq);
+
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(max77686_pm, max77686_suspend, max77686_resume);
+
static struct i2c_driver max77686_i2c_driver = {
.driver = {
.name = "max77686",
.owner = THIS_MODULE,
+ .pm = &max77686_pm,
.of_match_table = of_match_ptr(max77686_pmic_dt_match),
},
.probe = max77686_i2c_probe,
--
2.0.0.rc2
On pią, 2014-07-04 at 22:24 +0200, Javier Martinez Canillas wrote:
> The MAX7802 PMIC has a Real-Time-Clock (RTC) with two alarms.
> This patch adds support for the RTC and is based on a driver
> added by Simon Glass to the Chrome OS kernel 3.8 tree.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> ---
>
> Changes since v6:
> - Remove unused code for SMPL and WTSR. Suggested by Krzysztof Kozlowski.
> - Don't spam the kernel log with unimportant info and just print for debug.
> Suggested by Krzysztof Kozlowski.
> - Use ARRAY_SIZE() instead of constant value. Suggested by Krzysztof Kozlowski.
> - Remove duplicated register setup. Suggested by Krzysztof Kozlowski.
> - Don't free/unregister managed allocated resources.
> Suggested by Krzysztof Kozlowski.
> ---
> drivers/rtc/Kconfig | 10 +
> drivers/rtc/Makefile | 1 +
> drivers/rtc/rtc-max77802.c | 508 +++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 519 insertions(+)
> create mode 100644 drivers/rtc/rtc-max77802.c
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Best regards,
Krzysztof
>
> diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> index a672dd1..243ac72 100644
> --- a/drivers/rtc/Kconfig
> +++ b/drivers/rtc/Kconfig
> @@ -288,6 +288,16 @@ config RTC_DRV_MAX77686
> This driver can also be built as a module. If so, the module
> will be called rtc-max77686.
>
> +config RTC_DRV_MAX77802
> + tristate "Maxim 77802 RTC"
> + depends on MFD_MAX77686
> + help
> + If you say yes here you will get support for the
> + RTC of Maxim MAX77802 PMIC.
> +
> + This driver can also be built as a module. If so, the module
> + will be called rtc-max77802.
> +
> config RTC_DRV_RS5C372
> tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
> help
> diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
> index 70347d0..247de78 100644
> --- a/drivers/rtc/Makefile
> +++ b/drivers/rtc/Makefile
> @@ -81,6 +81,7 @@ obj-$(CONFIG_RTC_DRV_MAX8998) += rtc-max8998.o
> obj-$(CONFIG_RTC_DRV_MAX8997) += rtc-max8997.o
> obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
> obj-$(CONFIG_RTC_DRV_MAX77686) += rtc-max77686.o
> +obj-$(CONFIG_RTC_DRV_MAX77802) += rtc-max77802.o
> obj-$(CONFIG_RTC_DRV_MC13XXX) += rtc-mc13xxx.o
> obj-$(CONFIG_RTC_DRV_MCP795) += rtc-mcp795.o
> obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o
> diff --git a/drivers/rtc/rtc-max77802.c b/drivers/rtc/rtc-max77802.c
> new file mode 100644
> index 0000000..f8898ff
> --- /dev/null
> +++ b/drivers/rtc/rtc-max77802.c
> @@ -0,0 +1,508 @@
> +/*
> + * RTC driver for Maxim MAX77802
> + *
> + * Copyright (C) 2013 Google, Inc
> + *
> + * Copyright (C) 2012 Samsung Electronics Co.Ltd
> + *
> + * based on rtc-max8997.c
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2 of the License, or (at your
> + * option) any later version.
> + *
> + */
> +
> +#include <linux/slab.h>
> +#include <linux/rtc.h>
> +#include <linux/delay.h>
> +#include <linux/mutex.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/mfd/max77686-private.h>
> +#include <linux/irqdomain.h>
> +#include <linux/regmap.h>
> +
> +/* RTC Control Register */
> +#define BCD_EN_SHIFT 0
> +#define BCD_EN_MASK (1 << BCD_EN_SHIFT)
> +#define MODEL24_SHIFT 1
> +#define MODEL24_MASK (1 << MODEL24_SHIFT)
> +/* RTC Update Register1 */
> +#define RTC_UDR_SHIFT 0
> +#define RTC_UDR_MASK (1 << RTC_UDR_SHIFT)
> +#define RTC_RBUDR_SHIFT 4
> +#define RTC_RBUDR_MASK (1 << RTC_RBUDR_SHIFT)
> +/* RTC Hour register */
> +#define HOUR_PM_SHIFT 6
> +#define HOUR_PM_MASK (1 << HOUR_PM_SHIFT)
> +/* RTC Alarm Enable */
> +#define ALARM_ENABLE_SHIFT 7
> +#define ALARM_ENABLE_MASK (1 << ALARM_ENABLE_SHIFT)
> +
> +/* For the RTCAE1 register, we write this value to enable the alarm */
> +#define ALARM_ENABLE_VALUE 0x77
> +
> +#define MAX77802_RTC_UPDATE_DELAY_US 200
> +
> +enum {
> + RTC_SEC = 0,
> + RTC_MIN,
> + RTC_HOUR,
> + RTC_WEEKDAY,
> + RTC_MONTH,
> + RTC_YEAR,
> + RTC_DATE,
> + RTC_NR_TIME
> +};
> +
> +struct max77802_rtc_info {
> + struct device *dev;
> + struct max77686_dev *max77802;
> + struct i2c_client *rtc;
> + struct rtc_device *rtc_dev;
> + struct mutex lock;
> +
> + struct regmap *regmap;
> +
> + int virq;
> + int rtc_24hr_mode;
> +};
> +
> +enum MAX77802_RTC_OP {
> + MAX77802_RTC_WRITE,
> + MAX77802_RTC_READ,
> +};
> +
> +static inline int max77802_rtc_calculate_wday(u8 shifted)
> +{
> + int counter = -1;
> +
> + while (shifted) {
> + shifted >>= 1;
> + counter++;
> + }
> +
> + return counter;
> +}
> +
> +static void max77802_rtc_data_to_tm(u8 *data, struct rtc_time *tm,
> + int rtc_24hr_mode)
> +{
> + tm->tm_sec = data[RTC_SEC] & 0xff;
> + tm->tm_min = data[RTC_MIN] & 0xff;
> + if (rtc_24hr_mode)
> + tm->tm_hour = data[RTC_HOUR] & 0x1f;
> + else {
> + tm->tm_hour = data[RTC_HOUR] & 0x0f;
> + if (data[RTC_HOUR] & HOUR_PM_MASK)
> + tm->tm_hour += 12;
> + }
> +
> + tm->tm_wday = max77802_rtc_calculate_wday(data[RTC_WEEKDAY] & 0xff);
> + tm->tm_mday = data[RTC_DATE] & 0x1f;
> + tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
> +
> + tm->tm_year = data[RTC_YEAR] & 0xff;
> + tm->tm_yday = 0;
> + tm->tm_isdst = 0;
> +}
> +
> +static int max77802_rtc_tm_to_data(struct rtc_time *tm, u8 *data)
> +{
> + data[RTC_SEC] = tm->tm_sec;
> + data[RTC_MIN] = tm->tm_min;
> + data[RTC_HOUR] = tm->tm_hour;
> + data[RTC_WEEKDAY] = 1 << tm->tm_wday;
> + data[RTC_DATE] = tm->tm_mday;
> + data[RTC_MONTH] = tm->tm_mon + 1;
> + data[RTC_YEAR] = tm->tm_year;
> +
> + return 0;
> +}
> +
> +static int max77802_rtc_update(struct max77802_rtc_info *info,
> + enum MAX77802_RTC_OP op)
> +{
> + int ret;
> + unsigned int data;
> +
> + if (op == MAX77802_RTC_WRITE)
> + data = 1 << RTC_UDR_SHIFT;
> + else
> + data = 1 << RTC_RBUDR_SHIFT;
> +
> + ret = regmap_update_bits(info->max77802->regmap,
> + MAX77802_RTC_UPDATE0, data, data);
> + if (ret < 0)
> + dev_err(info->dev, "%s: fail to write update reg(ret=%d, data=0x%x)\n",
> + __func__, ret, data);
> + else {
> + /* Minimum delay required before RTC update. */
> + usleep_range(MAX77802_RTC_UPDATE_DELAY_US,
> + MAX77802_RTC_UPDATE_DELAY_US * 2);
> + }
> +
> + return ret;
> +}
> +
> +static int max77802_rtc_read_time(struct device *dev, struct rtc_time *tm)
> +{
> + struct max77802_rtc_info *info = dev_get_drvdata(dev);
> + u8 data[RTC_NR_TIME];
> + int ret;
> +
> + mutex_lock(&info->lock);
> +
> + ret = max77802_rtc_update(info, MAX77802_RTC_READ);
> + if (ret < 0)
> + goto out;
> +
> + ret = regmap_bulk_read(info->max77802->regmap,
> + MAX77802_RTC_SEC, data, RTC_NR_TIME);
> + if (ret < 0) {
> + dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__,
> + ret);
> + goto out;
> + }
> +
> + max77802_rtc_data_to_tm(data, tm, info->rtc_24hr_mode);
> +
> + ret = rtc_valid_tm(tm);
> +
> +out:
> + mutex_unlock(&info->lock);
> + return ret;
> +}
> +
> +static int max77802_rtc_set_time(struct device *dev, struct rtc_time *tm)
> +{
> + struct max77802_rtc_info *info = dev_get_drvdata(dev);
> + u8 data[RTC_NR_TIME];
> + int ret;
> +
> + ret = max77802_rtc_tm_to_data(tm, data);
> + if (ret < 0)
> + return ret;
> +
> + mutex_lock(&info->lock);
> +
> + ret = regmap_bulk_write(info->max77802->regmap,
> + MAX77802_RTC_SEC, data, RTC_NR_TIME);
> + if (ret < 0) {
> + dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__,
> + ret);
> + goto out;
> + }
> +
> + ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
> +
> +out:
> + mutex_unlock(&info->lock);
> + return ret;
> +}
> +
> +static int max77802_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
> +{
> + struct max77802_rtc_info *info = dev_get_drvdata(dev);
> + u8 data[RTC_NR_TIME];
> + unsigned int val;
> + int ret;
> +
> + mutex_lock(&info->lock);
> +
> + ret = max77802_rtc_update(info, MAX77802_RTC_READ);
> + if (ret < 0)
> + goto out;
> +
> + ret = regmap_bulk_read(info->max77802->regmap,
> + MAX77802_ALARM1_SEC, data, RTC_NR_TIME);
> + if (ret < 0) {
> + dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n",
> + __func__, __LINE__, ret);
> + goto out;
> + }
> +
> + max77802_rtc_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
> +
> + alrm->enabled = 0;
> + ret = regmap_read(info->max77802->regmap,
> + MAX77802_RTC_AE1, &val);
> + if (ret < 0) {
> + dev_err(info->dev, "%s:%d fail to read alarm enable(%d)\n",
> + __func__, __LINE__, ret);
> + goto out;
> + }
> + if (val)
> + alrm->enabled = 1;
> +
> + alrm->pending = 0;
> + ret = regmap_read(info->max77802->regmap, MAX77802_REG_STATUS2, &val);
> + if (ret < 0) {
> + dev_err(info->dev, "%s:%d fail to read status2 reg(%d)\n",
> + __func__, __LINE__, ret);
> + goto out;
> + }
> +
> + if (val & (1 << 2)) /* RTCA1 */
> + alrm->pending = 1;
> +
> +out:
> + mutex_unlock(&info->lock);
> + return 0;
> +}
> +
> +static int max77802_rtc_stop_alarm(struct max77802_rtc_info *info)
> +{
> + int ret;
> +
> + if (!mutex_is_locked(&info->lock))
> + dev_warn(info->dev, "%s: should have mutex locked\n", __func__);
> +
> + ret = max77802_rtc_update(info, MAX77802_RTC_READ);
> + if (ret < 0)
> + goto out;
> +
> + ret = regmap_write(info->max77802->regmap,
> + MAX77802_RTC_AE1, 0);
> + if (ret < 0) {
> + dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
> + __func__, ret);
> + goto out;
> + }
> +
> + ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
> +out:
> + return ret;
> +}
> +
> +static int max77802_rtc_start_alarm(struct max77802_rtc_info *info)
> +{
> + int ret;
> +
> + if (!mutex_is_locked(&info->lock))
> + dev_warn(info->dev, "%s: should have mutex locked\n",
> + __func__);
> +
> + ret = max77802_rtc_update(info, MAX77802_RTC_READ);
> + if (ret < 0)
> + goto out;
> +
> + ret = regmap_write(info->max77802->regmap,
> + MAX77802_RTC_AE1,
> + ALARM_ENABLE_VALUE);
> +
> + if (ret < 0) {
> + dev_err(info->dev, "%s: fail to read alarm reg(%d)\n",
> + __func__, ret);
> + goto out;
> + }
> +
> + ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
> +out:
> + return ret;
> +}
> +
> +static int max77802_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
> +{
> + struct max77802_rtc_info *info = dev_get_drvdata(dev);
> + u8 data[RTC_NR_TIME];
> + int ret;
> +
> + ret = max77802_rtc_tm_to_data(&alrm->time, data);
> + if (ret < 0)
> + return ret;
> +
> + mutex_lock(&info->lock);
> +
> + ret = max77802_rtc_stop_alarm(info);
> + if (ret < 0)
> + goto out;
> +
> + ret = regmap_bulk_write(info->max77802->regmap,
> + MAX77802_ALARM1_SEC, data, RTC_NR_TIME);
> +
> + if (ret < 0) {
> + dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
> + __func__, ret);
> + goto out;
> + }
> +
> + ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
> + if (ret < 0)
> + goto out;
> +
> + if (alrm->enabled)
> + ret = max77802_rtc_start_alarm(info);
> +out:
> + mutex_unlock(&info->lock);
> + return ret;
> +}
> +
> +static int max77802_rtc_alarm_irq_enable(struct device *dev,
> + unsigned int enabled)
> +{
> + struct max77802_rtc_info *info = dev_get_drvdata(dev);
> + int ret;
> +
> + mutex_lock(&info->lock);
> + if (enabled)
> + ret = max77802_rtc_start_alarm(info);
> + else
> + ret = max77802_rtc_stop_alarm(info);
> + mutex_unlock(&info->lock);
> +
> + return ret;
> +}
> +
> +static irqreturn_t max77802_rtc_alarm_irq(int irq, void *data)
> +{
> + struct max77802_rtc_info *info = data;
> +
> + dev_dbg(info->dev, "%s:irq(%d)\n", __func__, irq);
> +
> + rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static const struct rtc_class_ops max77802_rtc_ops = {
> + .read_time = max77802_rtc_read_time,
> + .set_time = max77802_rtc_set_time,
> + .read_alarm = max77802_rtc_read_alarm,
> + .set_alarm = max77802_rtc_set_alarm,
> + .alarm_irq_enable = max77802_rtc_alarm_irq_enable,
> +};
> +
> +static int max77802_rtc_init_reg(struct max77802_rtc_info *info)
> +{
> + u8 data[2];
> + int ret;
> +
> + max77802_rtc_update(info, MAX77802_RTC_READ);
> +
> + /* Set RTC control register : Binary mode, 24hour mdoe */
> + data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
> + data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
> +
> + info->rtc_24hr_mode = 1;
> +
> + ret = regmap_bulk_write(info->max77802->regmap,
> + MAX77802_RTC_CONTROLM, data, ARRAY_SIZE(data));
> + if (ret < 0) {
> + dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
> + __func__, ret);
> + return ret;
> + }
> +
> + ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
> + return ret;
> +}
> +
> +static int max77802_rtc_probe(struct platform_device *pdev)
> +{
> + struct max77686_dev *max77802 = dev_get_drvdata(pdev->dev.parent);
> + struct max77802_rtc_info *info;
> + int ret;
> +
> + dev_dbg(&pdev->dev, "%s\n", __func__);
> +
> + info = devm_kzalloc(&pdev->dev, sizeof(struct max77802_rtc_info),
> + GFP_KERNEL);
> + if (!info)
> + return -ENOMEM;
> +
> + mutex_init(&info->lock);
> + info->dev = &pdev->dev;
> + info->max77802 = max77802;
> + info->rtc = max77802->i2c;
> +
> + platform_set_drvdata(pdev, info);
> +
> + ret = max77802_rtc_init_reg(info);
> +
> + if (ret < 0) {
> + dev_err(&pdev->dev, "Failed to initialize RTC reg:%d\n", ret);
> + return ret;
> + }
> +
> + device_init_wakeup(&pdev->dev, 1);
> +
> + info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max77802-rtc",
> + &max77802_rtc_ops, THIS_MODULE);
> +
> + if (IS_ERR(info->rtc_dev)) {
> + ret = PTR_ERR(info->rtc_dev);
> + dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
> + if (ret == 0)
> + ret = -EINVAL;
> + return ret;
> + }
> + info->virq = regmap_irq_get_virq(max77802->rtc_irq_data,
> + MAX77686_RTCIRQ_RTCA1);
> +
> + if (info->virq <= 0) {
> + dev_err(&pdev->dev, "Failed to get virtual IRQ %d\n",
> + MAX77686_RTCIRQ_RTCA1);
> + ret = -EINVAL;
> + return ret;
> + }
> +
> + ret = devm_request_threaded_irq(&pdev->dev, info->virq, NULL,
> + max77802_rtc_alarm_irq, 0, "rtc-alarm1",
> + info);
> + if (ret < 0)
> + dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
> + info->virq, ret);
> +
> + return ret;
> +}
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int max77802_rtc_suspend(struct device *dev)
> +{
> + if (device_may_wakeup(dev)) {
> + struct max77802_rtc_info *info = dev_get_drvdata(dev);
> +
> + return enable_irq_wake(info->virq);
> + }
> +
> + return 0;
> +}
> +
> +static int max77802_rtc_resume(struct device *dev)
> +{
> + if (device_may_wakeup(dev)) {
> + struct max77802_rtc_info *info = dev_get_drvdata(dev);
> +
> + return disable_irq_wake(info->virq);
> + }
> +
> + return 0;
> +}
> +#endif
> +
> +static SIMPLE_DEV_PM_OPS(max77802_rtc_pm_ops,
> + max77802_rtc_suspend, max77802_rtc_resume);
> +
> +static const struct platform_device_id rtc_id[] = {
> + { "max77802-rtc", 0 },
> + {},
> +};
> +
> +static struct platform_driver max77802_rtc_driver = {
> + .driver = {
> + .name = "max77802-rtc",
> + .owner = THIS_MODULE,
> + .pm = &max77802_rtc_pm_ops,
> + },
> + .probe = max77802_rtc_probe,
> + .id_table = rtc_id,
> +};
> +
> +module_platform_driver(max77802_rtc_driver);
> +
> +MODULE_DESCRIPTION("Maxim MAX77802 RTC driver");
> +MODULE_AUTHOR("Simon Glass <[email protected]>");
> +MODULE_LICENSE("GPL");
On pią, 2014-07-04 at 22:24 +0200, Javier Martinez Canillas wrote:
> The MAX77686 RTC chip has two features called SMPL (Sudden Momentary
> Power Loss) and WTSR (Watchdog Timeout and Software Resets).
> Support for these features seems to be implemented in the driver but
> compilation is disabled using a C pre-processor conditional.
>
> This code has been disabled since the driver was original merged in
> commit fca1dd03 ("rtc: max77686: add Maxim 77686 driver").
>
> So, since this code has never been built, let's just remove it.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> ---
> drivers/rtc/rtc-max77686.c | 101 ---------------------------------------------
> 1 file changed, 101 deletions(-)
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Best regards,
Krzysztof
>
> diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
> index c1c6055..7bb5433 100644
> --- a/drivers/rtc/rtc-max77686.c
> +++ b/drivers/rtc/rtc-max77686.c
> @@ -32,15 +32,6 @@
> #define RTC_UDR_MASK (1 << RTC_UDR_SHIFT)
> #define RTC_RBUDR_SHIFT 4
> #define RTC_RBUDR_MASK (1 << RTC_RBUDR_SHIFT)
> -/* WTSR and SMPL Register */
> -#define WTSRT_SHIFT 0
> -#define SMPLT_SHIFT 2
> -#define WTSR_EN_SHIFT 6
> -#define SMPL_EN_SHIFT 7
> -#define WTSRT_MASK (3 << WTSRT_SHIFT)
> -#define SMPLT_MASK (3 << SMPLT_SHIFT)
> -#define WTSR_EN_MASK (1 << WTSR_EN_SHIFT)
> -#define SMPL_EN_MASK (1 << SMPL_EN_SHIFT)
> /* RTC Hour register */
> #define HOUR_PM_SHIFT 6
> #define HOUR_PM_MASK (1 << HOUR_PM_SHIFT)
> @@ -49,7 +40,6 @@
> #define ALARM_ENABLE_MASK (1 << ALARM_ENABLE_SHIFT)
>
> #define MAX77686_RTC_UPDATE_DELAY 16
> -#undef MAX77686_RTC_WTSR_SMPL
>
> enum {
> RTC_SEC = 0,
> @@ -412,64 +402,6 @@ static const struct rtc_class_ops max77686_rtc_ops = {
> .alarm_irq_enable = max77686_rtc_alarm_irq_enable,
> };
>
> -#ifdef MAX77686_RTC_WTSR_SMPL
> -static void max77686_rtc_enable_wtsr(struct max77686_rtc_info *info, bool enable)
> -{
> - int ret;
> - unsigned int val, mask;
> -
> - if (enable)
> - val = (1 << WTSR_EN_SHIFT) | (3 << WTSRT_SHIFT);
> - else
> - val = 0;
> -
> - mask = WTSR_EN_MASK | WTSRT_MASK;
> -
> - dev_info(info->dev, "%s: %s WTSR\n", __func__,
> - enable ? "enable" : "disable");
> -
> - ret = regmap_update_bits(info->max77686->rtc_regmap,
> - MAX77686_WTSR_SMPL_CNTL, mask, val);
> - if (ret < 0) {
> - dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n",
> - __func__, ret);
> - return;
> - }
> -
> - max77686_rtc_update(info, MAX77686_RTC_WRITE);
> -}
> -
> -static void max77686_rtc_enable_smpl(struct max77686_rtc_info *info, bool enable)
> -{
> - int ret;
> - unsigned int val, mask;
> -
> - if (enable)
> - val = (1 << SMPL_EN_SHIFT) | (0 << SMPLT_SHIFT);
> - else
> - val = 0;
> -
> - mask = SMPL_EN_MASK | SMPLT_MASK;
> -
> - dev_info(info->dev, "%s: %s SMPL\n", __func__,
> - enable ? "enable" : "disable");
> -
> - ret = regmap_update_bits(info->max77686->rtc_regmap,
> - MAX77686_WTSR_SMPL_CNTL, mask, val);
> - if (ret < 0) {
> - dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n",
> - __func__, ret);
> - return;
> - }
> -
> - max77686_rtc_update(info, MAX77686_RTC_WRITE);
> -
> - val = 0;
> - regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val);
> - dev_info(info->dev, "%s: WTSR_SMPL(0x%02x)\n", __func__, val);
> -}
> -#endif /* MAX77686_RTC_WTSR_SMPL */
> -
> static int max77686_rtc_init_reg(struct max77686_rtc_info *info)
> {
> u8 data[2];
> @@ -519,11 +451,6 @@ static int max77686_rtc_probe(struct platform_device *pdev)
> goto err_rtc;
> }
>
> -#ifdef MAX77686_RTC_WTSR_SMPL
> - max77686_rtc_enable_wtsr(info, true);
> - max77686_rtc_enable_smpl(info, true);
> -#endif
> -
> device_init_wakeup(&pdev->dev, 1);
>
> info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max77686-rtc",
> @@ -556,33 +483,6 @@ err_rtc:
> return ret;
> }
>
> -static void max77686_rtc_shutdown(struct platform_device *pdev)
> -{
> -#ifdef MAX77686_RTC_WTSR_SMPL
> - struct max77686_rtc_info *info = platform_get_drvdata(pdev);
> - int i;
> - u8 val = 0;
> -
> - for (i = 0; i < 3; i++) {
> - max77686_rtc_enable_wtsr(info, false);
> - regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val);
> - dev_info(info->dev, "%s: WTSR_SMPL reg(0x%02x)\n", __func__,
> - val);
> - if (val & WTSR_EN_MASK) {
> - dev_emerg(info->dev, "%s: fail to disable WTSR\n",
> - __func__);
> - } else {
> - dev_info(info->dev, "%s: success to disable WTSR\n",
> - __func__);
> - break;
> - }
> - }
> -
> - /* Disable SMPL when power off */
> - max77686_rtc_enable_smpl(info, false);
> -#endif /* MAX77686_RTC_WTSR_SMPL */
> -}
> -
> #ifdef CONFIG_PM_SLEEP
> static int max77686_rtc_suspend(struct device *dev)
> {
> @@ -622,7 +522,6 @@ static struct platform_driver max77686_rtc_driver = {
> .pm = &max77686_rtc_pm_ops,
> },
> .probe = max77686_rtc_probe,
> - .shutdown = max77686_rtc_shutdown,
> .id_table = rtc_id,
> };
>
Hello Krzysztof,
On 07/07/2014 08:06 AM, Krzysztof Kozlowski wrote:
> On pią, 2014-07-04 at 22:24 +0200, Javier Martinez Canillas wrote:
>> The MAX7802 PMIC has a Real-Time-Clock (RTC) with two alarms.
>> This patch adds support for the RTC and is based on a driver
>> added by Simon Glass to the Chrome OS kernel 3.8 tree.
>>
>> Signed-off-by: Javier Martinez Canillas <[email protected]>
>> ---
>>
>> Changes since v6:
>> - Remove unused code for SMPL and WTSR. Suggested by Krzysztof Kozlowski.
>> - Don't spam the kernel log with unimportant info and just print for debug.
>> Suggested by Krzysztof Kozlowski.
>> - Use ARRAY_SIZE() instead of constant value. Suggested by Krzysztof Kozlowski.
>> - Remove duplicated register setup. Suggested by Krzysztof Kozlowski.
>> - Don't free/unregister managed allocated resources.
>> Suggested by Krzysztof Kozlowski.
>> ---
>> drivers/rtc/Kconfig | 10 +
>> drivers/rtc/Makefile | 1 +
>> drivers/rtc/rtc-max77802.c | 508 +++++++++++++++++++++++++++++++++++++++++++++
>> 3 files changed, 519 insertions(+)
>> create mode 100644 drivers/rtc/rtc-max77802.c
>
>
> Reviewed-by: Krzysztof Kozlowski <[email protected]>
>
Thanks a lot for the review and for all the feedback you gave me on each version
of the series.
> Best regards,
> Krzysztof
>
>
Best regards,
Javier
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> The driver doesn't have PM operations defined so add a suspend
> and resume function handlers to allow the PMIC IRQ to wakeup
> the system when it is put into a sleep state.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> Reviewed-by: Krzysztof Kozlowski <[email protected]>
> ---
> drivers/mfd/max77686.c | 40 ++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 40 insertions(+)
Patch looks good. I guess the set needs to go in as one big lump due
to interdependencies, so for my own benefit (to prevent re-reviewing):
Acked-by: Lee Jones <[email protected]>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> When the CONFIG_OF option was not enabled, a dummy function
> max77686_i2c_parse_dt_pdata() was defined since this is called
> unconditionally on probe(). Just always define the real function
> and conditionally call it if CONFIG_OF is enabled instead.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> ---
> drivers/mfd/max77686.c | 10 +---------
Acked-by: Lee Jones <[email protected]>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> The function max77802_i2c_parse_dt_pdata() should only be called
> if there isn't already platform data for the device.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> ---
> drivers/mfd/max77686.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
I assume some of these patches can be applied independently.
Let me know which ones and I'll apply them. In the mean time:
Acked-by: Lee Jones <[email protected]>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> When platform data is not found an -EIO (I/O error) code is returned.
> This doesn't seem to be the correct error so better return -EINVAL
> (Invalid argument) which is what most drivers do in this case.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> ---
> drivers/mfd/max77686.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Acked-by: Lee Jones <[email protected]>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> Error checking across the driver is mostly consistent besides
> a few exceptions, so change these exceptions for consistency.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> Reviewed-by: Krzysztof Kozlowski <[email protected]>
> ---
> drivers/mfd/max77686.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
Acked-by: Lee Jones <[email protected]>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
I'd really like Linus Walleij to look over this if possible.
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> Some regulators on the MAX77686 PMIC have Dynamic Voltage Scaling
> (DVS) support that allows output voltage to change dynamically.
>
> For MAX77686, these regulators are Buck regulators 2, 3 and 4.
>
> Each Buck output voltage is selected using a set of external
> inputs: DVS1-3 and SELB2-4.
>
> DVS registers can be used to configure the output voltages for each
> Buck regulator and which one is active is controled by DVSx lines.
>
> SELBx lines are used to control if individual Buck lines are ON or OFF.
>
> This patch adds support to configure the DVSx and SELBx lines
> from DT and to setup and read the GPIO lines connected to them.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> Reviewed-by: Krzysztof Kozlowski <[email protected]>
> ---
>
> Changes since v6:
> - Add a comment that max77686_read_gpios() function can sleep.
> Sugggested by Krzysztof Kozlowski
> ---
> drivers/mfd/max77686.c | 119 +++++++++++++++++++++++++++++++++++++++++++
> include/linux/mfd/max77686.h | 18 ++++---
> 2 files changed, 129 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
> index 8650832..d193873 100644
> --- a/drivers/mfd/max77686.c
> +++ b/drivers/mfd/max77686.c
> @@ -32,8 +32,10 @@
> #include <linux/mfd/core.h>
> #include <linux/mfd/max77686.h>
> #include <linux/mfd/max77686-private.h>
> +#include <linux/gpio/consumer.h>
> #include <linux/err.h>
> #include <linux/of.h>
> +#include <linux/export.h>
>
> #define I2C_ADDR_RTC (0x0C >> 1)
>
> @@ -101,9 +103,119 @@ static const struct of_device_id max77686_pmic_dt_match[] = {
> {},
> };
>
> +static void max77686_dt_parse_dvs_gpio(struct device *dev)
> +{
> + struct max77686_platform_data *pd = dev_get_platdata(dev);
> + int i;
> +
> + /*
> + * NOTE: we don't consider GPIO errors fatal; board may have some lines
> + * directly pulled high or low and thus doesn't specify them.
> + */
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++)
> + pd->buck_gpio_dvs[i] =
> + devm_gpiod_get_index(dev, "max77686,pmic-buck-dvs", i);
> +
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++)
> + pd->buck_gpio_selb[i] =
> + devm_gpiod_get_index(dev, "max77686,pmic-buck-selb", i);
> +}
Not sure why you've pulled this out for parse_dt_pdata()?
> +/**
> + * max77686_setup_gpios() - init DVS-related GPIOs
> + * @dev: device whose platform data contains the dvs GPIOs information
> + *
> + * This function claims / initalizations GPIOs related to DVS if they are
s/initialzations/initialises
> + * defined. This may have the effect of switching voltages if the
s/if the/if
> + * pdata->buck_default_idx does not match the boot time state of pins.
> + */
> +int max77686_setup_gpios(struct device *dev)
> +{
> + struct max77686_platform_data *pd = dev_get_platdata(dev);
> + int buck_default_idx = pd->buck_default_idx;
You're saving 4 characters once here. Just use the variable in pd.
> + int ret;
> + int i;
Don't you want some locking around this?
> + /* Set all SELB high to avoid glitching while DVS is changing */
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
> + struct gpio_desc *gpio = pd->buck_gpio_selb[i];
> +
> + /* OK if some GPIOs aren't defined */
> + if (IS_ERR(gpio))
> + continue;
> +
> + ret = gpiod_direction_output_raw(gpio, 1);
> + if (ret) {
> + dev_err(dev, "can't set gpio[%d] dir: %d\n", i, ret);
> + return ret;
> + }
> + }
> +
> + /* Set our initial setting */
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++) {
> + struct gpio_desc *gpio = pd->buck_gpio_dvs[i];
> +
> + /* OK if some GPIOs aren't defined */
> + if (IS_ERR(gpio))
> + continue;
> +
> + /* If a GPIO is valid, set it */
> + gpiod_direction_output(gpio, (buck_default_idx >> i) & 1);
> + if (ret) {
> + dev_err(dev, "can't set gpio[%d]: dir %d\n", i, ret);
> + return ret;
> + }
> + }
> +
> + /* Now set SELB low to take effect */
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
> + struct gpio_desc *gpio = pd->buck_gpio_selb[i];
> +
> + if (!IS_ERR(gpio))
> + gpiod_set_value(gpio, 0);
> + }
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(max77686_setup_gpios);
> +
> +/**
> + * max77686_read_gpios() - read the current state of the dvs GPIOs
> + * @pdata: platform data that contains the dvs GPIOs information
> + *
> + * We call this function at bootup to detect what slot the firmware was
> + * using for the DVS GPIOs. That way we can properly preserve the firmware's
> + * voltage settings
> + *
> + * This function can sleep so must not be called from atomic context.
> + */
> +int max77686_read_gpios(struct max77686_platform_data *pdata)
> +{
> + int buck_default_idx = pdata->buck_default_idx;
Remove this, it adds very little.
> + int result = 0;
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(pdata->buck_gpio_dvs); i++) {
> + struct gpio_desc *gpio = pdata->buck_gpio_dvs[i];
> +
> + /* OK if some GPIOs aren't defined; we'll use default */
> + if (IS_ERR(gpio)) {
> + result |= buck_default_idx & (1 << i);
s/(1 << i)/BIT(i)/
> + continue;
> + }
> +
> + if (gpiod_get_value_cansleep(gpio))
> + result |= 1 << i;
Same here.
> + }
> +
> + return result;
> +}
> +EXPORT_SYMBOL_GPL(max77686_read_gpios);
> +
> static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
> *dev)
> {
> + struct device_node *np = dev->of_node;
> struct max77686_platform_data *pd;
>
> pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
> @@ -111,6 +223,13 @@ static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
> return NULL;
>
> dev->platform_data = pd;
> +
> + /* Read default index and ignore errors, since default is 0 */
> + of_property_read_u32(np, "max77686,pmic-buck-default-dvs-idx",
If it doesn't already have one, this needs a DT Ack and associated
documentation.
> + &pd->buck_default_idx);
> +
> + max77686_dt_parse_dvs_gpio(dev);
Bring code back into here and remove the call.
> return pd;
> }
>
> diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
> index 4cbcc13..46a736b 100644
> --- a/include/linux/mfd/max77686.h
> +++ b/include/linux/mfd/max77686.h
> @@ -99,15 +99,17 @@ struct max77686_platform_data {
> struct max77686_opmode_data *opmode_data;
>
> /*
> - * GPIO-DVS feature is not enabled with the current version of
> - * MAX77686 driver. Buck2/3/4_voltages[0] is used as the default
> - * voltage at probe. DVS/SELB gpios are set as OUTPUT-LOW.
> + * GPIO-DVS feature is not fully enabled with the current version of
> + * MAX77686 driver, but the driver does support using a DVS index other
> + * than the default of 0.
> */
> - int buck234_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
> - int buck234_gpio_selb[3]; /* [0]SELB2, [1]SELB3, [2]SELB4 */
> - unsigned int buck2_voltage[8]; /* buckx_voltage in uV */
> - unsigned int buck3_voltage[8];
> - unsigned int buck4_voltage[8];
> + struct gpio_desc *buck_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
> + int buck_default_idx; /* Default value of DVS1, 2, 3 */
> +
> + struct gpio_desc *buck_gpio_selb[3]; /* Buck regulators 2, 3, 4 */
> };
>
> +extern int max77686_setup_gpios(struct device *dev);
> +extern int max77686_read_gpios(struct max77686_platform_data *pdata);
> +
> #endif /* __LINUX_MFD_MAX77686_H */
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> Maxim MAX77802 is a power management chip that contains 10 high
> efficiency Buck regulators, 32 Low-dropout (LDO) regulators used
> to power up application processors and peripherals, a 2-channel
> 32kHz clock outputs, a Real-Time-Clock (RTC) and a I2C interface
> to program the individual regulators, clocks outputs and the RTC.
>
> This patch adds support for MAX77802 to the MAX77686 driver and is
> based on a driver added to the Chrome OS kernel 3.8 by Simon Glass.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> Reviewed-by: Krzysztof Kozlowski <[email protected]>
> ---
[...]
> static const struct i2c_device_id max77686_i2c_id[] = {
> { "max77686", TYPE_MAX77686 },
> + { "max77802", TYPE_MAX77802 },
> { }
There's no point in filling this in. Just empty it completely.
Once you've done that, resubmit the patchset with my:
Acked-by: Lee Jones <[email protected]>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
Hello Lee,
On 07/09/2014 04:52 PM, Lee Jones wrote:
> On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
>
>> The function max77802_i2c_parse_dt_pdata() should only be called
>> if there isn't already platform data for the device.
>>
>> Signed-off-by: Javier Martinez Canillas <[email protected]>
>> ---
>> drivers/mfd/max77686.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> I assume some of these patches can be applied independently.
>
Yes, some patches can be applied independently and it would be quite helpful
indeed since that will allow me to keep a smaller series :)
> Let me know which ones and I'll apply them. In the mean time:
>
> Acked-by: Lee Jones <[email protected]>
>
Patches 1-7 are just cleanups and improvements for max77686 mfd driver so they
can be applied safely. You had already acked 1-6 and 7 is just a trivial patch
so I guess you won't have issues with that one as well.
Patches 11 and 14 are small patches for the max77802 clk driver and Mike already
gave his Reviewed-by tag so if you are going to take the whole set through your
tree those two patches are safe to be applied as well.
Thanks a lot for your help and best regards,
Javier
Hello Lee,
Thanks a lot for your feedback.
On 07/09/2014 05:13 PM, Lee Jones wrote:
> I'd really like Linus Walleij to look over this if possible.
>
Ok, I'll cc Linus when posting the next version of the series.
> On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
>> Some regulators on the MAX77686 PMIC have Dynamic Voltage Scaling
>> (DVS) support that allows output voltage to change dynamically.
>>
>> For MAX77686, these regulators are Buck regulators 2, 3 and 4.
>>
>> Each Buck output voltage is selected using a set of external
>> inputs: DVS1-3 and SELB2-4.
>>
>> DVS registers can be used to configure the output voltages for each
>> Buck regulator and which one is active is controled by DVSx lines.
>>
>> SELBx lines are used to control if individual Buck lines are ON or OFF.
>>
>> This patch adds support to configure the DVSx and SELBx lines
>> from DT and to setup and read the GPIO lines connected to them.
>>
>> Signed-off-by: Javier Martinez Canillas <[email protected]>
>> Reviewed-by: Krzysztof Kozlowski <[email protected]>
>> ---
>>
>> Changes since v6:
>> - Add a comment that max77686_read_gpios() function can sleep.
>> Sugggested by Krzysztof Kozlowski
>> ---
>> drivers/mfd/max77686.c | 119 +++++++++++++++++++++++++++++++++++++++++++
>> include/linux/mfd/max77686.h | 18 ++++---
>> 2 files changed, 129 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
>> index 8650832..d193873 100644
>> --- a/drivers/mfd/max77686.c
>> +++ b/drivers/mfd/max77686.c
>> @@ -32,8 +32,10 @@
>> #include <linux/mfd/core.h>
>> #include <linux/mfd/max77686.h>
>> #include <linux/mfd/max77686-private.h>
>> +#include <linux/gpio/consumer.h>
>> #include <linux/err.h>
>> #include <linux/of.h>
>> +#include <linux/export.h>
>>
>> #define I2C_ADDR_RTC (0x0C >> 1)
>>
>> @@ -101,9 +103,119 @@ static const struct of_device_id max77686_pmic_dt_match[] = {
>> {},
>> };
>>
>> +static void max77686_dt_parse_dvs_gpio(struct device *dev)
>> +{
>> + struct max77686_platform_data *pd = dev_get_platdata(dev);
>> + int i;
>> +
>> + /*
>> + * NOTE: we don't consider GPIO errors fatal; board may have some lines
>> + * directly pulled high or low and thus doesn't specify them.
>> + */
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++)
>> + pd->buck_gpio_dvs[i] =
>> + devm_gpiod_get_index(dev, "max77686,pmic-buck-dvs", i);
>> +
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++)
>> + pd->buck_gpio_selb[i] =
>> + devm_gpiod_get_index(dev, "max77686,pmic-buck-selb", i);
>> +}
>
> Not sure why you've pulled this out for parse_dt_pdata()?
>
Ok, I'll remove that function and put the code in max77686_i2c_parse_dt_pdata().
>> +/**
>> + * max77686_setup_gpios() - init DVS-related GPIOs
>> + * @dev: device whose platform data contains the dvs GPIOs information
>> + *
>> + * This function claims / initalizations GPIOs related to DVS if they are
>
> s/initialzations/initialises
>
Right, will fix the typo.
>> + * defined. This may have the effect of switching voltages if the
>
> s/if the/if
>
Ditto.
>> + * pdata->buck_default_idx does not match the boot time state of pins.
>> + */
>> +int max77686_setup_gpios(struct device *dev)
>> +{
>> + struct max77686_platform_data *pd = dev_get_platdata(dev);
>> + int buck_default_idx = pd->buck_default_idx;
>
> You're saving 4 characters once here. Just use the variable in pd.
>
Ok
>> + int ret;
>> + int i;
>
> Don't you want some locking around this?
>
This function is only called in the max77686 and max77802 regulator drivers
probe functions and we expect to have either one of those in a system but never
both so this function can't really be executed concurrently.
And even in the case that a system has both max77686 and max77802 PMICs, all the
data accessed is local to the driver's struct device so I think there is no need
to add any locking here.
>> + /* Set all SELB high to avoid glitching while DVS is changing */
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
>> + struct gpio_desc *gpio = pd->buck_gpio_selb[i];
>> +
>> + /* OK if some GPIOs aren't defined */
>> + if (IS_ERR(gpio))
>> + continue;
>> +
>> + ret = gpiod_direction_output_raw(gpio, 1);
>> + if (ret) {
>> + dev_err(dev, "can't set gpio[%d] dir: %d\n", i, ret);
>> + return ret;
>> + }
>> + }
>> +
>> + /* Set our initial setting */
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++) {
>> + struct gpio_desc *gpio = pd->buck_gpio_dvs[i];
>> +
>> + /* OK if some GPIOs aren't defined */
>> + if (IS_ERR(gpio))
>> + continue;
>> +
>> + /* If a GPIO is valid, set it */
>> + gpiod_direction_output(gpio, (buck_default_idx >> i) & 1);
>> + if (ret) {
>> + dev_err(dev, "can't set gpio[%d]: dir %d\n", i, ret);
>> + return ret;
>> + }
>> + }
>> +
>> + /* Now set SELB low to take effect */
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
>> + struct gpio_desc *gpio = pd->buck_gpio_selb[i];
>> +
>> + if (!IS_ERR(gpio))
>> + gpiod_set_value(gpio, 0);
>> + }
>> +
>> + return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(max77686_setup_gpios);
>> +
>> +/**
>> + * max77686_read_gpios() - read the current state of the dvs GPIOs
>> + * @pdata: platform data that contains the dvs GPIOs information
>> + *
>> + * We call this function at bootup to detect what slot the firmware was
>> + * using for the DVS GPIOs. That way we can properly preserve the firmware's
>> + * voltage settings
>> + *
>> + * This function can sleep so must not be called from atomic context.
>> + */
>> +int max77686_read_gpios(struct max77686_platform_data *pdata)
>> +{
>> + int buck_default_idx = pdata->buck_default_idx;
>
> Remove this, it adds very little.
>
Ok.
>> + int result = 0;
>> + int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(pdata->buck_gpio_dvs); i++) {
>> + struct gpio_desc *gpio = pdata->buck_gpio_dvs[i];
>> +
>> + /* OK if some GPIOs aren't defined; we'll use default */
>> + if (IS_ERR(gpio)) {
>> + result |= buck_default_idx & (1 << i);
>
> s/(1 << i)/BIT(i)/
>
Ok.
>> + continue;
>> + }
>> +
>> + if (gpiod_get_value_cansleep(gpio))
>> + result |= 1 << i;
>
> Same here.
>
Ok.
>> + }
>> +
>> + return result;
>> +}
>> +EXPORT_SYMBOL_GPL(max77686_read_gpios);
>> +
>> static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
>> *dev)
>> {
>> + struct device_node *np = dev->of_node;
>> struct max77686_platform_data *pd;
>>
>> pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
>> @@ -111,6 +223,13 @@ static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
>> return NULL;
>>
>> dev->platform_data = pd;
>> +
>> + /* Read default index and ignore errors, since default is 0 */
>> + of_property_read_u32(np, "max77686,pmic-buck-default-dvs-idx",
>
> If it doesn't already have one, this needs a DT Ack and associated
> documentation.
>
Yes, these DT binding properties are documented in Patch 17/24 "mfd: max77686:
Add documentation for DVS bindings" and I've cc'ed [email protected] so
hopefully I can get some feedback/ack from DT maintainers.
>> + &pd->buck_default_idx);
>> +
>> + max77686_dt_parse_dvs_gpio(dev);
>
> Bring code back into here and remove the call.
>
Sure, will do.
>> return pd;
>> }
>>
>> diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
>> index 4cbcc13..46a736b 100644
>> --- a/include/linux/mfd/max77686.h
>> +++ b/include/linux/mfd/max77686.h
>> @@ -99,15 +99,17 @@ struct max77686_platform_data {
>> struct max77686_opmode_data *opmode_data;
>>
>> /*
>> - * GPIO-DVS feature is not enabled with the current version of
>> - * MAX77686 driver. Buck2/3/4_voltages[0] is used as the default
>> - * voltage at probe. DVS/SELB gpios are set as OUTPUT-LOW.
>> + * GPIO-DVS feature is not fully enabled with the current version of
>> + * MAX77686 driver, but the driver does support using a DVS index other
>> + * than the default of 0.
>> */
>> - int buck234_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
>> - int buck234_gpio_selb[3]; /* [0]SELB2, [1]SELB3, [2]SELB4 */
>> - unsigned int buck2_voltage[8]; /* buckx_voltage in uV */
>> - unsigned int buck3_voltage[8];
>> - unsigned int buck4_voltage[8];
>> + struct gpio_desc *buck_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
>> + int buck_default_idx; /* Default value of DVS1, 2, 3 */
>> +
>> + struct gpio_desc *buck_gpio_selb[3]; /* Buck regulators 2, 3, 4 */
>> };
>>
>> +extern int max77686_setup_gpios(struct device *dev);
>> +extern int max77686_read_gpios(struct max77686_platform_data *pdata);
>> +
>> #endif /* __LINUX_MFD_MAX77686_H */
>
Best regards,
Javier
Hello Lee,
On 07/09/2014 05:31 PM, Lee Jones wrote:
> On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
>> Maxim MAX77802 is a power management chip that contains 10 high
>> efficiency Buck regulators, 32 Low-dropout (LDO) regulators used
>> to power up application processors and peripherals, a 2-channel
>> 32kHz clock outputs, a Real-Time-Clock (RTC) and a I2C interface
>> to program the individual regulators, clocks outputs and the RTC.
>>
>> This patch adds support for MAX77802 to the MAX77686 driver and is
>> based on a driver added to the Chrome OS kernel 3.8 by Simon Glass.
>>
>> Signed-off-by: Javier Martinez Canillas <[email protected]>
>> Reviewed-by: Krzysztof Kozlowski <[email protected]>
>> ---
>
> [...]
>
>> static const struct i2c_device_id max77686_i2c_id[] = {
>> { "max77686", TYPE_MAX77686 },
>> + { "max77802", TYPE_MAX77802 },
>> { }
>
> There's no point in filling this in. Just empty it completely.
>
Ok, I won't fill this
> Once you've done that, resubmit the patchset with my:
>
> Acked-by: Lee Jones <[email protected]>
>
Thanks a lot.
Best regards,
Javier
On Fri, Jul 4, 2014 at 10:24 PM, Javier Martinez Canillas
<[email protected]> wrote:
> Some regulators on the MAX77686 PMIC have Dynamic Voltage Scaling
> (DVS) support that allows output voltage to change dynamically.
>
> For MAX77686, these regulators are Buck regulators 2, 3 and 4.
>
> Each Buck output voltage is selected using a set of external
> inputs: DVS1-3 and SELB2-4.
>
> DVS registers can be used to configure the output voltages for each
> Buck regulator and which one is active is controled by DVSx lines.
>
> SELBx lines are used to control if individual Buck lines are ON or OFF.
>
> This patch adds support to configure the DVSx and SELBx lines
> from DT and to setup and read the GPIO lines connected to them.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> Reviewed-by: Krzysztof Kozlowski <[email protected]>
(...)
> +#include <linux/gpio/consumer.h>
THANKS for using modern interfaces!
> +static void max77686_dt_parse_dvs_gpio(struct device *dev)
> +{
> + struct max77686_platform_data *pd = dev_get_platdata(dev);
> + int i;
> +
> + /*
> + * NOTE: we don't consider GPIO errors fatal; board may have some lines
> + * directly pulled high or low and thus doesn't specify them.
> + */
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++)
> + pd->buck_gpio_dvs[i] =
> + devm_gpiod_get_index(dev, "max77686,pmic-buck-dvs", i);
> +
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++)
> + pd->buck_gpio_selb[i] =
> + devm_gpiod_get_index(dev, "max77686,pmic-buck-selb", i);
> +}
Rob Jones has a patch cooking that adds gpio_get_array() so this thing
merits also adding devm_gpiod_get_array() I think?
> +/**
> + * max77686_setup_gpios() - init DVS-related GPIOs
> + * @dev: device whose platform data contains the dvs GPIOs information
> + *
> + * This function claims / initalizations GPIOs related to DVS if they are
> + * defined. This may have the effect of switching voltages if the
> + * pdata->buck_default_idx does not match the boot time state of pins.
> + */
> +int max77686_setup_gpios(struct device *dev)
> +{
> + struct max77686_platform_data *pd = dev_get_platdata(dev);
> + int buck_default_idx = pd->buck_default_idx;
> + int ret;
> + int i;
> +
> + /* Set all SELB high to avoid glitching while DVS is changing */
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
> + struct gpio_desc *gpio = pd->buck_gpio_selb[i];
> +
> + /* OK if some GPIOs aren't defined */
> + if (IS_ERR(gpio))
> + continue;
> +
> + ret = gpiod_direction_output_raw(gpio, 1);
Why does this have to be raw? Usually that is not to be used.
Apart from this it looks OK.
Yours,
Linus Walleij
On Sat, Jul 5, 2014 at 1:54 AM, Javier Martinez Canillas
<[email protected]> wrote:
> Some regulators on the MAX77686 PMIC have Dynamic Voltage Scaling
> (DVS) support that allows output voltage to change dynamically.
>
> For MAX77686, these regulators are Buck regulators 2, 3 and 4.
>
> Each Buck output voltage is selected using a set of external
> inputs: DVS1-3 and SELB2-4.
>
> DVS registers can be used to configure the output voltages for each
> Buck regulator and which one is active is controled by DVSx lines.
>
> SELBx lines are used to control if individual Buck lines are ON or OFF.
>
> This patch adds support to configure the DVSx and SELBx lines
> from DT and to setup and read the GPIO lines connected to them.
The entire series looks nice. Few minor comments from my side. I guess
still one more version in needed as per other ppls comment.
You may add,
Reviewed-by: Amit Daniel Kachhap <[email protected]>
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> Reviewed-by: Krzysztof Kozlowski <[email protected]>
> ---
>
> Changes since v6:
> - Add a comment that max77686_read_gpios() function can sleep.
> Sugggested by Krzysztof Kozlowski
> ---
> drivers/mfd/max77686.c | 119 +++++++++++++++++++++++++++++++++++++++++++
> include/linux/mfd/max77686.h | 18 ++++---
> 2 files changed, 129 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
> index 8650832..d193873 100644
> --- a/drivers/mfd/max77686.c
> +++ b/drivers/mfd/max77686.c
> @@ -32,8 +32,10 @@
> #include <linux/mfd/core.h>
> #include <linux/mfd/max77686.h>
> #include <linux/mfd/max77686-private.h>
> +#include <linux/gpio/consumer.h>
> #include <linux/err.h>
> #include <linux/of.h>
> +#include <linux/export.h>
>
> #define I2C_ADDR_RTC (0x0C >> 1)
>
> @@ -101,9 +103,119 @@ static const struct of_device_id max77686_pmic_dt_match[] = {
> {},
> };
>
> +static void max77686_dt_parse_dvs_gpio(struct device *dev)
> +{
> + struct max77686_platform_data *pd = dev_get_platdata(dev);
> + int i;
> +
> + /*
> + * NOTE: we don't consider GPIO errors fatal; board may have some lines
> + * directly pulled high or low and thus doesn't specify them.
> + */
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++)
> + pd->buck_gpio_dvs[i] =
> + devm_gpiod_get_index(dev, "max77686,pmic-buck-dvs", i);
> +
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++)
> + pd->buck_gpio_selb[i] =
> + devm_gpiod_get_index(dev, "max77686,pmic-buck-selb", i);
> +}
> +
> +/**
> + * max77686_setup_gpios() - init DVS-related GPIOs
> + * @dev: device whose platform data contains the dvs GPIOs information
> + *
> + * This function claims / initalizations GPIOs related to DVS if they are
> + * defined. This may have the effect of switching voltages if the
> + * pdata->buck_default_idx does not match the boot time state of pins.
> + */
> +int max77686_setup_gpios(struct device *dev)
> +{
> + struct max77686_platform_data *pd = dev_get_platdata(dev);
> + int buck_default_idx = pd->buck_default_idx;
> + int ret;
> + int i;
> +
> + /* Set all SELB high to avoid glitching while DVS is changing */
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
> + struct gpio_desc *gpio = pd->buck_gpio_selb[i];
> +
> + /* OK if some GPIOs aren't defined */
> + if (IS_ERR(gpio))
> + continue;
> +
> + ret = gpiod_direction_output_raw(gpio, 1);
> + if (ret) {
> + dev_err(dev, "can't set gpio[%d] dir: %d\n", i, ret);
> + return ret;
> + }
> + }
> +
> + /* Set our initial setting */
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++) {
> + struct gpio_desc *gpio = pd->buck_gpio_dvs[i];
> +
> + /* OK if some GPIOs aren't defined */
> + if (IS_ERR(gpio))
> + continue;
> +
> + /* If a GPIO is valid, set it */
> + gpiod_direction_output(gpio, (buck_default_idx >> i) & 1);
> + if (ret) {
> + dev_err(dev, "can't set gpio[%d]: dir %d\n", i, ret);
> + return ret;
> + }
> + }
> +
> + /* Now set SELB low to take effect */
> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
> + struct gpio_desc *gpio = pd->buck_gpio_selb[i];
> +
> + if (!IS_ERR(gpio))
> + gpiod_set_value(gpio, 0);
> + }
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(max77686_setup_gpios);
> +
> +/**
> + * max77686_read_gpios() - read the current state of the dvs GPIOs
> + * @pdata: platform data that contains the dvs GPIOs information
> + *
> + * We call this function at bootup to detect what slot the firmware was
> + * using for the DVS GPIOs. That way we can properly preserve the firmware's
> + * voltage settings
> + *
> + * This function can sleep so must not be called from atomic context.
> + */
> +int max77686_read_gpios(struct max77686_platform_data *pdata)
> +{
> + int buck_default_idx = pdata->buck_default_idx;
> + int result = 0;
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(pdata->buck_gpio_dvs); i++) {
> + struct gpio_desc *gpio = pdata->buck_gpio_dvs[i];
> +
> + /* OK if some GPIOs aren't defined; we'll use default */
> + if (IS_ERR(gpio)) {
> + result |= buck_default_idx & (1 << i);
> + continue;
> + }
> +
> + if (gpiod_get_value_cansleep(gpio))
> + result |= 1 << i;
> + }
> +
> + return result;
> +}
> +EXPORT_SYMBOL_GPL(max77686_read_gpios);
> +
> static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
> *dev)
> {
> + struct device_node *np = dev->of_node;
> struct max77686_platform_data *pd;
>
> pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
> @@ -111,6 +223,13 @@ static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
> return NULL;
>
> dev->platform_data = pd;
> +
> + /* Read default index and ignore errors, since default is 0 */
> + of_property_read_u32(np, "max77686,pmic-buck-default-dvs-idx",
> + &pd->buck_default_idx);
Any error checking code here. Say if pmic-buck-default-dvs-idx exceed 8?
> +
> + max77686_dt_parse_dvs_gpio(dev);
> +
> return pd;
> }
>
> diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
> index 4cbcc13..46a736b 100644
> --- a/include/linux/mfd/max77686.h
> +++ b/include/linux/mfd/max77686.h
> @@ -99,15 +99,17 @@ struct max77686_platform_data {
> struct max77686_opmode_data *opmode_data;
>
> /*
> - * GPIO-DVS feature is not enabled with the current version of
> - * MAX77686 driver. Buck2/3/4_voltages[0] is used as the default
> - * voltage at probe. DVS/SELB gpios are set as OUTPUT-LOW.
> + * GPIO-DVS feature is not fully enabled with the current version of
> + * MAX77686 driver, but the driver does support using a DVS index other
> + * than the default of 0.
> */
> - int buck234_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
> - int buck234_gpio_selb[3]; /* [0]SELB2, [1]SELB3, [2]SELB4 */
> - unsigned int buck2_voltage[8]; /* buckx_voltage in uV */
> - unsigned int buck3_voltage[8];
> - unsigned int buck4_voltage[8];
I think when DVS gpio is used all the 8 voltage levels are fetched
from DT during booting and the registers are programmed accordingly.
Any further set/get_voltage just changes the GPIO lines.
Any reason why this method is not used?
> + struct gpio_desc *buck_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
> + int buck_default_idx; /* Default value of DVS1, 2, 3 */
> +
> + struct gpio_desc *buck_gpio_selb[3]; /* Buck regulators 2, 3, 4 */
> };
>
> +extern int max77686_setup_gpios(struct device *dev);
> +extern int max77686_read_gpios(struct max77686_platform_data *pdata);
> +
> #endif /* __LINUX_MFD_MAX77686_H */
> --
> 2.0.0.rc2
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> [email protected]
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
Hello Linus,
On 07/10/2014 11:46 AM, Linus Walleij wrote:
> On Fri, Jul 4, 2014 at 10:24 PM, Javier Martinez Canillas
> <[email protected]> wrote:
>
>> Some regulators on the MAX77686 PMIC have Dynamic Voltage Scaling
>> (DVS) support that allows output voltage to change dynamically.
>>
>> For MAX77686, these regulators are Buck regulators 2, 3 and 4.
>>
>> Each Buck output voltage is selected using a set of external
>> inputs: DVS1-3 and SELB2-4.
>>
>> DVS registers can be used to configure the output voltages for each
>> Buck regulator and which one is active is controled by DVSx lines.
>>
>> SELBx lines are used to control if individual Buck lines are ON or OFF.
>>
>> This patch adds support to configure the DVSx and SELBx lines
>> from DT and to setup and read the GPIO lines connected to them.
>>
>> Signed-off-by: Javier Martinez Canillas <[email protected]>
>> Reviewed-by: Krzysztof Kozlowski <[email protected]>
>
> (...)
>> +#include <linux/gpio/consumer.h>
>
> THANKS for using modern interfaces!
>
Thanks to you and Alexandre for keep improving the GPIO subsystem!
>> +static void max77686_dt_parse_dvs_gpio(struct device *dev)
>> +{
>> + struct max77686_platform_data *pd = dev_get_platdata(dev);
>> + int i;
>> +
>> + /*
>> + * NOTE: we don't consider GPIO errors fatal; board may have some lines
>> + * directly pulled high or low and thus doesn't specify them.
>> + */
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++)
>> + pd->buck_gpio_dvs[i] =
>> + devm_gpiod_get_index(dev, "max77686,pmic-buck-dvs", i);
>> +
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++)
>> + pd->buck_gpio_selb[i] =
>> + devm_gpiod_get_index(dev, "max77686,pmic-buck-selb", i);
>> +}
>
> Rob Jones has a patch cooking that adds gpio_get_array() so this thing
> merits also adding devm_gpiod_get_array() I think?
>
Yes, I just asked [0] Rob on the other thread if he is already implementing the
descriptor-based version of his devm_request_gpio_array() or if I should go and
implement it.
Now, I wonder if that can be done in a follow-up patch (e.g: use the new
devm_gpiod_get_array once it lands in Torvalds tree) since this series already
touches several subsystems (mfd, regulators, clk and rtc) so if possible I would
prefer to not add another cross-subsystem dependency :)
>> +/**
>> + * max77686_setup_gpios() - init DVS-related GPIOs
>> + * @dev: device whose platform data contains the dvs GPIOs information
>> + *
>> + * This function claims / initalizations GPIOs related to DVS if they are
>> + * defined. This may have the effect of switching voltages if the
>> + * pdata->buck_default_idx does not match the boot time state of pins.
>> + */
>> +int max77686_setup_gpios(struct device *dev)
>> +{
>> + struct max77686_platform_data *pd = dev_get_platdata(dev);
>> + int buck_default_idx = pd->buck_default_idx;
>> + int ret;
>> + int i;
>> +
>> + /* Set all SELB high to avoid glitching while DVS is changing */
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
>> + struct gpio_desc *gpio = pd->buck_gpio_selb[i];
>> +
>> + /* OK if some GPIOs aren't defined */
>> + if (IS_ERR(gpio))
>> + continue;
>> +
>> + ret = gpiod_direction_output_raw(gpio, 1);
>
> Why does this have to be raw? Usually that is not to be used.
>
Right, I can't think of a good reason why this has to be raw and not just use
gpiod_direction_output() which will check the active-low flag and set the value
accordingly. I'll change it on the next revision.
> Apart from this it looks OK.
>
Great, thanks a lot for your feedback.
> Yours,
> Linus Walleij
>
Best regards,
Javier
[0]: https://lkml.org/lkml/2014/7/10/722
Hello Amit,
On 07/10/2014 11:59 AM, amit daniel kachhap wrote:
> On Sat, Jul 5, 2014 at 1:54 AM, Javier Martinez Canillas
> <[email protected]> wrote:
>> Some regulators on the MAX77686 PMIC have Dynamic Voltage Scaling
>> (DVS) support that allows output voltage to change dynamically.
>>
>> For MAX77686, these regulators are Buck regulators 2, 3 and 4.
>>
>> Each Buck output voltage is selected using a set of external
>> inputs: DVS1-3 and SELB2-4.
>>
>> DVS registers can be used to configure the output voltages for each
>> Buck regulator and which one is active is controled by DVSx lines.
>>
>> SELBx lines are used to control if individual Buck lines are ON or OFF.
>>
>> This patch adds support to configure the DVSx and SELBx lines
>> from DT and to setup and read the GPIO lines connected to them.
>
> The entire series looks nice. Few minor comments from my side. I guess
> still one more version in needed as per other ppls comment.
> You may add,
> Reviewed-by: Amit Daniel Kachhap <[email protected]>
>
Thanks.
>>
>> Signed-off-by: Javier Martinez Canillas <[email protected]>
>> Reviewed-by: Krzysztof Kozlowski <[email protected]>
>> ---
>>
>> Changes since v6:
>> - Add a comment that max77686_read_gpios() function can sleep.
>> Sugggested by Krzysztof Kozlowski
>> ---
>> drivers/mfd/max77686.c | 119 +++++++++++++++++++++++++++++++++++++++++++
>> include/linux/mfd/max77686.h | 18 ++++---
>> 2 files changed, 129 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
>> index 8650832..d193873 100644
>> --- a/drivers/mfd/max77686.c
>> +++ b/drivers/mfd/max77686.c
>> @@ -32,8 +32,10 @@
>> #include <linux/mfd/core.h>
>> #include <linux/mfd/max77686.h>
>> #include <linux/mfd/max77686-private.h>
>> +#include <linux/gpio/consumer.h>
>> #include <linux/err.h>
>> #include <linux/of.h>
>> +#include <linux/export.h>
>>
>> #define I2C_ADDR_RTC (0x0C >> 1)
>>
>> @@ -101,9 +103,119 @@ static const struct of_device_id max77686_pmic_dt_match[] = {
>> {},
>> };
>>
>> +static void max77686_dt_parse_dvs_gpio(struct device *dev)
>> +{
>> + struct max77686_platform_data *pd = dev_get_platdata(dev);
>> + int i;
>> +
>> + /*
>> + * NOTE: we don't consider GPIO errors fatal; board may have some lines
>> + * directly pulled high or low and thus doesn't specify them.
>> + */
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++)
>> + pd->buck_gpio_dvs[i] =
>> + devm_gpiod_get_index(dev, "max77686,pmic-buck-dvs", i);
>> +
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++)
>> + pd->buck_gpio_selb[i] =
>> + devm_gpiod_get_index(dev, "max77686,pmic-buck-selb", i);
>> +}
>> +
>> +/**
>> + * max77686_setup_gpios() - init DVS-related GPIOs
>> + * @dev: device whose platform data contains the dvs GPIOs information
>> + *
>> + * This function claims / initalizations GPIOs related to DVS if they are
>> + * defined. This may have the effect of switching voltages if the
>> + * pdata->buck_default_idx does not match the boot time state of pins.
>> + */
>> +int max77686_setup_gpios(struct device *dev)
>> +{
>> + struct max77686_platform_data *pd = dev_get_platdata(dev);
>> + int buck_default_idx = pd->buck_default_idx;
>> + int ret;
>> + int i;
>> +
>> + /* Set all SELB high to avoid glitching while DVS is changing */
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
>> + struct gpio_desc *gpio = pd->buck_gpio_selb[i];
>> +
>> + /* OK if some GPIOs aren't defined */
>> + if (IS_ERR(gpio))
>> + continue;
>> +
>> + ret = gpiod_direction_output_raw(gpio, 1);
>> + if (ret) {
>> + dev_err(dev, "can't set gpio[%d] dir: %d\n", i, ret);
>> + return ret;
>> + }
>> + }
>> +
>> + /* Set our initial setting */
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++) {
>> + struct gpio_desc *gpio = pd->buck_gpio_dvs[i];
>> +
>> + /* OK if some GPIOs aren't defined */
>> + if (IS_ERR(gpio))
>> + continue;
>> +
>> + /* If a GPIO is valid, set it */
>> + gpiod_direction_output(gpio, (buck_default_idx >> i) & 1);
>> + if (ret) {
>> + dev_err(dev, "can't set gpio[%d]: dir %d\n", i, ret);
>> + return ret;
>> + }
>> + }
>> +
>> + /* Now set SELB low to take effect */
>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
>> + struct gpio_desc *gpio = pd->buck_gpio_selb[i];
>> +
>> + if (!IS_ERR(gpio))
>> + gpiod_set_value(gpio, 0);
>> + }
>> +
>> + return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(max77686_setup_gpios);
>> +
>> +/**
>> + * max77686_read_gpios() - read the current state of the dvs GPIOs
>> + * @pdata: platform data that contains the dvs GPIOs information
>> + *
>> + * We call this function at bootup to detect what slot the firmware was
>> + * using for the DVS GPIOs. That way we can properly preserve the firmware's
>> + * voltage settings
>> + *
>> + * This function can sleep so must not be called from atomic context.
>> + */
>> +int max77686_read_gpios(struct max77686_platform_data *pdata)
>> +{
>> + int buck_default_idx = pdata->buck_default_idx;
>> + int result = 0;
>> + int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(pdata->buck_gpio_dvs); i++) {
>> + struct gpio_desc *gpio = pdata->buck_gpio_dvs[i];
>> +
>> + /* OK if some GPIOs aren't defined; we'll use default */
>> + if (IS_ERR(gpio)) {
>> + result |= buck_default_idx & (1 << i);
>> + continue;
>> + }
>> +
>> + if (gpiod_get_value_cansleep(gpio))
>> + result |= 1 << i;
>> + }
>> +
>> + return result;
>> +}
>> +EXPORT_SYMBOL_GPL(max77686_read_gpios);
>> +
>> static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
>> *dev)
>> {
>> + struct device_node *np = dev->of_node;
>> struct max77686_platform_data *pd;
>>
>> pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
>> @@ -111,6 +223,13 @@ static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
>> return NULL;
>>
>> dev->platform_data = pd;
>> +
>> + /* Read default index and ignore errors, since default is 0 */
>> + of_property_read_u32(np, "max77686,pmic-buck-default-dvs-idx",
>> + &pd->buck_default_idx);
> Any error checking code here. Say if pmic-buck-default-dvs-idx exceed 8?
I'm not a DT expert but AFAIK the kernel should expect the data in a FDT to be
correct and should not validate it on runtime. There is work-in-progress to add
a proper schema checking for DTS to the dtc so on build time it can be validated
that a DTS is valid.
AFAIU the only thing that the kernel should check is if a required property does
not exist.
>> +
>> + max77686_dt_parse_dvs_gpio(dev);
>> +
>> return pd;
>> }
>>
>> diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
>> index 4cbcc13..46a736b 100644
>> --- a/include/linux/mfd/max77686.h
>> +++ b/include/linux/mfd/max77686.h
>> @@ -99,15 +99,17 @@ struct max77686_platform_data {
>> struct max77686_opmode_data *opmode_data;
>>
>> /*
>> - * GPIO-DVS feature is not enabled with the current version of
>> - * MAX77686 driver. Buck2/3/4_voltages[0] is used as the default
>> - * voltage at probe. DVS/SELB gpios are set as OUTPUT-LOW.
>> + * GPIO-DVS feature is not fully enabled with the current version of
>> + * MAX77686 driver, but the driver does support using a DVS index other
>> + * than the default of 0.
>> */
>> - int buck234_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
>> - int buck234_gpio_selb[3]; /* [0]SELB2, [1]SELB3, [2]SELB4 */
>> - unsigned int buck2_voltage[8]; /* buckx_voltage in uV */
>> - unsigned int buck3_voltage[8];
>> - unsigned int buck4_voltage[8];
> I think when DVS gpio is used all the 8 voltage levels are fetched
> from DT during booting and the registers are programmed accordingly.
> Any further set/get_voltage just changes the GPIO lines.
> Any reason why this method is not used?
What are you describing is how the DT binding works for other Maxim PMICs that
also have DVS support right? (e.g: max8997).
The DVS binding in max77686/802 is actually a subset of the one in max8997 so it
let's you only choose which single DVS index is going to be used. The GPIOs in
"max77686,pmic-buck-dvs-gpios" should match "pmic-buck-default-dvs-idx".
To be honest I just took the DT binding that was used in the max77xxx driver
from the Chrome OS 3.8 kernel and didn't compare it with other Maxim PMICs DT
bingings.
I wonder if I should just take the DVS patches out from this initial version to
avoid blocking the max77802 support and then we can discuss this in more detail.
>> + struct gpio_desc *buck_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
>> + int buck_default_idx; /* Default value of DVS1, 2, 3 */
>> +
>> + struct gpio_desc *buck_gpio_selb[3]; /* Buck regulators 2, 3, 4 */
>> };
>>
>> +extern int max77686_setup_gpios(struct device *dev);
>> +extern int max77686_read_gpios(struct max77686_platform_data *pdata);
>> +
>> #endif /* __LINUX_MFD_MAX77686_H */
>> --
>> 2.0.0.rc2
>>
Best regards,
Javier
Hi,
On Thu, Jul 10, 2014 at 6:45 PM, Javier Martinez Canillas
<[email protected]> wrote:
>> I think when DVS gpio is used all the 8 voltage levels are fetched
>> from DT during booting and the registers are programmed accordingly.
>> Any further set/get_voltage just changes the GPIO lines.
>> Any reason why this method is not used?
>
> What are you describing is how the DT binding works for other Maxim PMICs that
> also have DVS support right? (e.g: max8997).
>
> The DVS binding in max77686/802 is actually a subset of the one in max8997 so it
> let's you only choose which single DVS index is going to be used. The GPIOs in
> "max77686,pmic-buck-dvs-gpios" should match "pmic-buck-default-dvs-idx".
>
> To be honest I just took the DT binding that was used in the max77xxx driver
> from the Chrome OS 3.8 kernel and didn't compare it with other Maxim PMICs DT
> bingings.
>
> I wonder if I should just take the DVS patches out from this initial version to
> avoid blocking the max77802 support and then we can discuss this in more detail.
To give background:
* On exynos5250 / exynos5420 / exynos5800 the CPUFreq driver exposes
more than 8 different operating points. You could argue about whether
that's useful but that's the way it is right now. That means that
using the GPIOs is not trivial (you'd have to use a mix of GPIOs and
i2c and use heuristics).
* On the Samsung Chromebook 2 we use the DVFS GPIOs to get back to a
sane state after a warm reset. When the CPU resets itself all GPIOs
will default back to their reset state. That will effectively
transfer us to DVFS slot 0. We make sure that the kernel always
modifies a different DVFS slot.
* On all known boards all DVFS GPIOs were hooked up. I originally
wrote code assuming that someone could design a board with fewer lines
hooked up but I don't know of that being done.
-Doug
On Fri, Jul 11, 2014 at 7:15 AM, Javier Martinez Canillas
<[email protected]> wrote:
> Hello Amit,
>
> On 07/10/2014 11:59 AM, amit daniel kachhap wrote:
>> On Sat, Jul 5, 2014 at 1:54 AM, Javier Martinez Canillas
>> <[email protected]> wrote:
>>> Some regulators on the MAX77686 PMIC have Dynamic Voltage Scaling
>>> (DVS) support that allows output voltage to change dynamically.
>>>
>>> For MAX77686, these regulators are Buck regulators 2, 3 and 4.
>>>
>>> Each Buck output voltage is selected using a set of external
>>> inputs: DVS1-3 and SELB2-4.
>>>
>>> DVS registers can be used to configure the output voltages for each
>>> Buck regulator and which one is active is controled by DVSx lines.
>>>
>>> SELBx lines are used to control if individual Buck lines are ON or OFF.
>>>
>>> This patch adds support to configure the DVSx and SELBx lines
>>> from DT and to setup and read the GPIO lines connected to them.
>>
>> The entire series looks nice. Few minor comments from my side. I guess
>> still one more version in needed as per other ppls comment.
>> You may add,
>> Reviewed-by: Amit Daniel Kachhap <[email protected]>
>>
>
> Thanks.
>
>>>
>>> Signed-off-by: Javier Martinez Canillas <[email protected]>
>>> Reviewed-by: Krzysztof Kozlowski <[email protected]>
>>> ---
>>>
>>> Changes since v6:
>>> - Add a comment that max77686_read_gpios() function can sleep.
>>> Sugggested by Krzysztof Kozlowski
>>> ---
>>> drivers/mfd/max77686.c | 119 +++++++++++++++++++++++++++++++++++++++++++
>>> include/linux/mfd/max77686.h | 18 ++++---
>>> 2 files changed, 129 insertions(+), 8 deletions(-)
>>>
>>> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
>>> index 8650832..d193873 100644
>>> --- a/drivers/mfd/max77686.c
>>> +++ b/drivers/mfd/max77686.c
>>> @@ -32,8 +32,10 @@
>>> #include <linux/mfd/core.h>
>>> #include <linux/mfd/max77686.h>
>>> #include <linux/mfd/max77686-private.h>
>>> +#include <linux/gpio/consumer.h>
>>> #include <linux/err.h>
>>> #include <linux/of.h>
>>> +#include <linux/export.h>
>>>
>>> #define I2C_ADDR_RTC (0x0C >> 1)
>>>
>>> @@ -101,9 +103,119 @@ static const struct of_device_id max77686_pmic_dt_match[] = {
>>> {},
>>> };
>>>
>>> +static void max77686_dt_parse_dvs_gpio(struct device *dev)
>>> +{
>>> + struct max77686_platform_data *pd = dev_get_platdata(dev);
>>> + int i;
>>> +
>>> + /*
>>> + * NOTE: we don't consider GPIO errors fatal; board may have some lines
>>> + * directly pulled high or low and thus doesn't specify them.
>>> + */
>>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++)
>>> + pd->buck_gpio_dvs[i] =
>>> + devm_gpiod_get_index(dev, "max77686,pmic-buck-dvs", i);
>>> +
>>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++)
>>> + pd->buck_gpio_selb[i] =
>>> + devm_gpiod_get_index(dev, "max77686,pmic-buck-selb", i);
>>> +}
>>> +
>>> +/**
>>> + * max77686_setup_gpios() - init DVS-related GPIOs
>>> + * @dev: device whose platform data contains the dvs GPIOs information
>>> + *
>>> + * This function claims / initalizations GPIOs related to DVS if they are
>>> + * defined. This may have the effect of switching voltages if the
>>> + * pdata->buck_default_idx does not match the boot time state of pins.
>>> + */
>>> +int max77686_setup_gpios(struct device *dev)
>>> +{
>>> + struct max77686_platform_data *pd = dev_get_platdata(dev);
>>> + int buck_default_idx = pd->buck_default_idx;
>>> + int ret;
>>> + int i;
>>> +
>>> + /* Set all SELB high to avoid glitching while DVS is changing */
>>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
>>> + struct gpio_desc *gpio = pd->buck_gpio_selb[i];
>>> +
>>> + /* OK if some GPIOs aren't defined */
>>> + if (IS_ERR(gpio))
>>> + continue;
>>> +
>>> + ret = gpiod_direction_output_raw(gpio, 1);
>>> + if (ret) {
>>> + dev_err(dev, "can't set gpio[%d] dir: %d\n", i, ret);
>>> + return ret;
>>> + }
>>> + }
>>> +
>>> + /* Set our initial setting */
>>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++) {
>>> + struct gpio_desc *gpio = pd->buck_gpio_dvs[i];
>>> +
>>> + /* OK if some GPIOs aren't defined */
>>> + if (IS_ERR(gpio))
>>> + continue;
>>> +
>>> + /* If a GPIO is valid, set it */
>>> + gpiod_direction_output(gpio, (buck_default_idx >> i) & 1);
>>> + if (ret) {
>>> + dev_err(dev, "can't set gpio[%d]: dir %d\n", i, ret);
>>> + return ret;
>>> + }
>>> + }
>>> +
>>> + /* Now set SELB low to take effect */
>>> + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) {
>>> + struct gpio_desc *gpio = pd->buck_gpio_selb[i];
>>> +
>>> + if (!IS_ERR(gpio))
>>> + gpiod_set_value(gpio, 0);
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +EXPORT_SYMBOL_GPL(max77686_setup_gpios);
>>> +
>>> +/**
>>> + * max77686_read_gpios() - read the current state of the dvs GPIOs
>>> + * @pdata: platform data that contains the dvs GPIOs information
>>> + *
>>> + * We call this function at bootup to detect what slot the firmware was
>>> + * using for the DVS GPIOs. That way we can properly preserve the firmware's
>>> + * voltage settings
>>> + *
>>> + * This function can sleep so must not be called from atomic context.
>>> + */
>>> +int max77686_read_gpios(struct max77686_platform_data *pdata)
>>> +{
>>> + int buck_default_idx = pdata->buck_default_idx;
>>> + int result = 0;
>>> + int i;
>>> +
>>> + for (i = 0; i < ARRAY_SIZE(pdata->buck_gpio_dvs); i++) {
>>> + struct gpio_desc *gpio = pdata->buck_gpio_dvs[i];
>>> +
>>> + /* OK if some GPIOs aren't defined; we'll use default */
>>> + if (IS_ERR(gpio)) {
>>> + result |= buck_default_idx & (1 << i);
>>> + continue;
>>> + }
>>> +
>>> + if (gpiod_get_value_cansleep(gpio))
>>> + result |= 1 << i;
>>> + }
>>> +
>>> + return result;
>>> +}
>>> +EXPORT_SYMBOL_GPL(max77686_read_gpios);
>>> +
>>> static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
>>> *dev)
>>> {
>>> + struct device_node *np = dev->of_node;
>>> struct max77686_platform_data *pd;
>>>
>>> pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
>>> @@ -111,6 +223,13 @@ static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
>>> return NULL;
>>>
>>> dev->platform_data = pd;
>>> +
>>> + /* Read default index and ignore errors, since default is 0 */
>>> + of_property_read_u32(np, "max77686,pmic-buck-default-dvs-idx",
>>> + &pd->buck_default_idx);
>> Any error checking code here. Say if pmic-buck-default-dvs-idx exceed 8?
>
> I'm not a DT expert but AFAIK the kernel should expect the data in a FDT to be
> correct and should not validate it on runtime. There is work-in-progress to add
> a proper schema checking for DTS to the dtc so on build time it can be validated
> that a DTS is valid.
Hmm its fine then.
>
> AFAIU the only thing that the kernel should check is if a required property does
> not exist.
>
>>> +
>>> + max77686_dt_parse_dvs_gpio(dev);
>>> +
>>> return pd;
>>> }
>>>
>>> diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
>>> index 4cbcc13..46a736b 100644
>>> --- a/include/linux/mfd/max77686.h
>>> +++ b/include/linux/mfd/max77686.h
>>> @@ -99,15 +99,17 @@ struct max77686_platform_data {
>>> struct max77686_opmode_data *opmode_data;
>>>
>>> /*
>>> - * GPIO-DVS feature is not enabled with the current version of
>>> - * MAX77686 driver. Buck2/3/4_voltages[0] is used as the default
>>> - * voltage at probe. DVS/SELB gpios are set as OUTPUT-LOW.
>>> + * GPIO-DVS feature is not fully enabled with the current version of
>>> + * MAX77686 driver, but the driver does support using a DVS index other
>>> + * than the default of 0.
>>> */
>>> - int buck234_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
>>> - int buck234_gpio_selb[3]; /* [0]SELB2, [1]SELB3, [2]SELB4 */
>>> - unsigned int buck2_voltage[8]; /* buckx_voltage in uV */
>>> - unsigned int buck3_voltage[8];
>>> - unsigned int buck4_voltage[8];
>> I think when DVS gpio is used all the 8 voltage levels are fetched
>> from DT during booting and the registers are programmed accordingly.
>> Any further set/get_voltage just changes the GPIO lines.
>> Any reason why this method is not used?
>
> What are you describing is how the DT binding works for other Maxim PMICs that
> also have DVS support right? (e.g: max8997).
>
> The DVS binding in max77686/802 is actually a subset of the one in max8997 so it
> let's you only choose which single DVS index is going to be used. The GPIOs in
> "max77686,pmic-buck-dvs-gpios" should match "pmic-buck-default-dvs-idx".
>
> To be honest I just took the DT binding that was used in the max77xxx driver
> from the Chrome OS 3.8 kernel and didn't compare it with other Maxim PMICs DT
> bingings.
>
> I wonder if I should just take the DVS patches out from this initial version to
> avoid blocking the max77802 support and then we can discuss this in more detail.
Agreed DVS functionality can be added later.
>
>>> + struct gpio_desc *buck_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
>>> + int buck_default_idx; /* Default value of DVS1, 2, 3 */
>>> +
>>> + struct gpio_desc *buck_gpio_selb[3]; /* Buck regulators 2, 3, 4 */
>>> };
>>>
>>> +extern int max77686_setup_gpios(struct device *dev);
>>> +extern int max77686_read_gpios(struct max77686_platform_data *pdata);
>>> +
>>> #endif /* __LINUX_MFD_MAX77686_H */
>>> --
>>> 2.0.0.rc2
>>>
>
> Best regards,
> Javier
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Javier,
On 11.07.2014 03:45, Javier Martinez Canillas wrote:
> On 07/10/2014 11:59 AM, amit daniel kachhap wrote:
>> On Sat, Jul 5, 2014 at 1:54 AM, Javier Martinez Canillas
>> <[email protected]> wrote:
[snip]
>>> @@ -111,6 +223,13 @@ static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
>>> return NULL;
>>>
>>> dev->platform_data = pd;
>>> +
>>> + /* Read default index and ignore errors, since default is 0 */
>>> + of_property_read_u32(np, "max77686,pmic-buck-default-dvs-idx",
>>> + &pd->buck_default_idx);
>> Any error checking code here. Say if pmic-buck-default-dvs-idx exceed 8?
>
> I'm not a DT expert but AFAIK the kernel should expect the data in a FDT to be
> correct and should not validate it on runtime. There is work-in-progress to add
> a proper schema checking for DTS to the dtc so on build time it can be validated
> that a DTS is valid.
>
> AFAIU the only thing that the kernel should check is if a required property does
> not exist.
I'd disagree on this.
IMHO schema (if it progresses further, as unfortunately I can't find
time to dedicate to it and looks like it's similar for other people that
used to be involved) should be focused on structural checks, i.e. proper
layout of nodes and properties, basic data types and so, to figure out
common errors earlier than at boot-up time.
On kernel side this should be treated in the same way as platform data.
I agree that some existing drivers do little to validate incoming data,
but I believe it is a good practice to validate things that the driver
has no control over, especially when it's about a PMIC, when invalid
data can have quite serious effects and detecting even some of them
(e.g. value to big, which would overflow in target bit field) might
prevent a failure.
Best regards,
Tomasz
Hello Tomasz,
On 07/11/2014 11:43 AM, Tomasz Figa wrote:
> Hi Javier,
>
> On 11.07.2014 03:45, Javier Martinez Canillas wrote:
>> On 07/10/2014 11:59 AM, amit daniel kachhap wrote:
>>> On Sat, Jul 5, 2014 at 1:54 AM, Javier Martinez Canillas
>>> <[email protected]> wrote:
>
> [snip]
>
>>>> @@ -111,6 +223,13 @@ static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
>>>> return NULL;
>>>>
>>>> dev->platform_data = pd;
>>>> +
>>>> + /* Read default index and ignore errors, since default is 0 */
>>>> + of_property_read_u32(np, "max77686,pmic-buck-default-dvs-idx",
>>>> + &pd->buck_default_idx);
>>> Any error checking code here. Say if pmic-buck-default-dvs-idx exceed 8?
>>
>> I'm not a DT expert but AFAIK the kernel should expect the data in a FDT to be
>> correct and should not validate it on runtime. There is work-in-progress to add
>> a proper schema checking for DTS to the dtc so on build time it can be validated
>> that a DTS is valid.
>>
>> AFAIU the only thing that the kernel should check is if a required property does
>> not exist.
>
> I'd disagree on this.
>
> IMHO schema (if it progresses further, as unfortunately I can't find
> time to dedicate to it and looks like it's similar for other people that
> used to be involved) should be focused on structural checks, i.e. proper
> layout of nodes and properties, basic data types and so, to figure out
> common errors earlier than at boot-up time.
>
> On kernel side this should be treated in the same way as platform data.
> I agree that some existing drivers do little to validate incoming data,
> but I believe it is a good practice to validate things that the driver
> has no control over, especially when it's about a PMIC, when invalid
> data can have quite serious effects and detecting even some of them
> (e.g. value to big, which would overflow in target bit field) might
> prevent a failure.
>
Thanks a lot for the clarification and I completely agree with your explanation.
I'll add proper validation for the data obtained by DT then. It would be nice if
this was documented somewhere (or maybe I missed it).
> Best regards,
> Tomasz
>
Best regards,
Javier
> By using the generic IRQ support in the Register map API, it
> is possible to get rid max77686-irq.c and simplify the code.
>
> Suggested-by: Krzysztof Kozlowski <[email protected]>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> Acked-by: Lee Jones <[email protected]>
> Reviewed-by: Doug Anderson <[email protected]>
> Tested-by: Doug Anderson <[email protected]>
Applied now, thanks.
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> The driver doesn't have PM operations defined so add a suspend
> and resume function handlers to allow the PMIC IRQ to wakeup
> the system when it is put into a sleep state.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> Reviewed-by: Krzysztof Kozlowski <[email protected]>
> ---
> drivers/mfd/max77686.c | 40 ++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 40 insertions(+)
Applied now, thanks.
> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
> index 3cb41d0..a38e9ee 100644
> --- a/drivers/mfd/max77686.c
> +++ b/drivers/mfd/max77686.c
> @@ -240,10 +240,50 @@ static const struct i2c_device_id max77686_i2c_id[] = {
> };
> MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);
>
> +#ifdef CONFIG_PM_SLEEP
> +static int max77686_suspend(struct device *dev)
> +{
> + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
> + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
> +
> + if (device_may_wakeup(dev))
> + enable_irq_wake(max77686->irq);
> +
> + /*
> + * IRQ must be disabled during suspend because if it happens
> + * while suspended it will be handled before resuming I2C.
> + *
> + * When device is woken up from suspend (e.g. by RTC wake alarm),
> + * an interrupt occurs before resuming I2C bus controller.
> + * Interrupt handler tries to read registers but this read
> + * will fail because I2C is still suspended.
> + */
> + disable_irq(max77686->irq);
> +
> + return 0;
> +}
> +
> +static int max77686_resume(struct device *dev)
> +{
> + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
> + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
> +
> + if (device_may_wakeup(dev))
> + disable_irq_wake(max77686->irq);
> +
> + enable_irq(max77686->irq);
> +
> + return 0;
> +}
> +#endif /* CONFIG_PM_SLEEP */
> +
> +static SIMPLE_DEV_PM_OPS(max77686_pm, max77686_suspend, max77686_resume);
> +
> static struct i2c_driver max77686_i2c_driver = {
> .driver = {
> .name = "max77686",
> .owner = THIS_MODULE,
> + .pm = &max77686_pm,
> .of_match_table = of_match_ptr(max77686_pmic_dt_match),
> },
> .probe = max77686_i2c_probe,
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> When the CONFIG_OF option was not enabled, a dummy function
> max77686_i2c_parse_dt_pdata() was defined since this is called
> unconditionally on probe(). Just always define the real function
> and conditionally call it if CONFIG_OF is enabled instead.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> ---
> drivers/mfd/max77686.c | 10 +---------
> 1 file changed, 1 insertion(+), 9 deletions(-)
Applied now, thanks.
> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
> index a38e9ee..d1f9d04 100644
> --- a/drivers/mfd/max77686.c
> +++ b/drivers/mfd/max77686.c
> @@ -96,7 +96,6 @@ static const struct regmap_irq_chip max77686_rtc_irq_chip = {
> .num_irqs = ARRAY_SIZE(max77686_rtc_irqs),
> };
>
> -#ifdef CONFIG_OF
> static const struct of_device_id max77686_pmic_dt_match[] = {
> {.compatible = "maxim,max77686", .data = NULL},
> {},
> @@ -116,13 +115,6 @@ static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
> dev->platform_data = pd;
> return pd;
> }
> -#else
> -static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
> - *dev)
> -{
> - return 0;
> -}
> -#endif
>
> static int max77686_i2c_probe(struct i2c_client *i2c,
> const struct i2c_device_id *id)
> @@ -132,7 +124,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
> unsigned int data;
> int ret = 0;
>
> - if (i2c->dev.of_node)
> + if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node)
> pdata = max77686_i2c_parse_dt_pdata(&i2c->dev);
>
> if (!pdata) {
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> Error checking across the driver is mostly consistent besides
> a few exceptions, so change these exceptions for consistency.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> Reviewed-by: Krzysztof Kozlowski <[email protected]>
> ---
> drivers/mfd/max77686.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
Applied now, thanks.
> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
> index ada4976..87fe52e 100644
> --- a/drivers/mfd/max77686.c
> +++ b/drivers/mfd/max77686.c
> @@ -134,7 +134,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
>
> max77686 = devm_kzalloc(&i2c->dev,
> sizeof(struct max77686_dev), GFP_KERNEL);
> - if (max77686 == NULL)
> + if (!max77686)
> return -ENOMEM;
>
> i2c_set_clientdata(i2c, max77686);
> @@ -153,8 +153,8 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
> return ret;
> }
>
> - if (regmap_read(max77686->regmap,
> - MAX77686_REG_DEVICE_ID, &data) < 0) {
> + ret = regmap_read(max77686->regmap, MAX77686_REG_DEVICE_ID, &data);
> + if (ret < 0) {
> dev_err(max77686->dev,
> "device not found on this channel (this is not an error)\n");
> return -ENODEV;
> @@ -180,7 +180,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
> IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
> IRQF_SHARED, 0, &max77686_irq_chip,
> &max77686->irq_data);
> - if (ret != 0) {
> + if (ret) {
> dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
> goto err_unregister_i2c;
> }
> @@ -188,7 +188,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
> IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
> IRQF_SHARED, 0, &max77686_rtc_irq_chip,
> &max77686->rtc_irq_data);
> - if (ret != 0) {
> + if (ret) {
> dev_err(&i2c->dev, "failed to add RTC irq chip: %d\n", ret);
> goto err_del_irqc;
> }
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> There is no need to print out-of-memory errors since this is already
> done by the memory management subsystem which even calls dump_stack().
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> ---
> drivers/mfd/max77686.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
Applied now, thanks.
> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
> index 87fe52e..8650832 100644
> --- a/drivers/mfd/max77686.c
> +++ b/drivers/mfd/max77686.c
> @@ -107,10 +107,8 @@ static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
> struct max77686_platform_data *pd;
>
> pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
> - if (!pd) {
> - dev_err(dev, "could not allocate memory for pdata\n");
> + if (!pd)
> return NULL;
> - }
>
> dev->platform_data = pd;
> return pd;
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> When platform data is not found an -EIO (I/O error) code is returned.
> This doesn't seem to be the correct error so better return -EINVAL
> (Invalid argument) which is what most drivers do in this case.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> ---
> drivers/mfd/max77686.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Applied now, thanks.
> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
> index 12d4c17..ada4976 100644
> --- a/drivers/mfd/max77686.c
> +++ b/drivers/mfd/max77686.c
> @@ -129,7 +129,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
>
> if (!pdata) {
> dev_err(&i2c->dev, "No platform data found.\n");
> - return -EIO;
> + return -EINVAL;
> }
>
> max77686 = devm_kzalloc(&i2c->dev,
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On Fri, 04 Jul 2014, Javier Martinez Canillas wrote:
> The function max77802_i2c_parse_dt_pdata() should only be called
> if there isn't already platform data for the device.
>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> ---
> drivers/mfd/max77686.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Applied now, thanks.
> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
> index d1f9d04..12d4c17 100644
> --- a/drivers/mfd/max77686.c
> +++ b/drivers/mfd/max77686.c
> @@ -124,7 +124,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
> unsigned int data;
> int ret = 0;
>
> - if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node)
> + if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node && !pdata)
> pdata = max77686_i2c_parse_dt_pdata(&i2c->dev);
>
> if (!pdata) {
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog