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 second version of the patch-set addresses several issues pointed
out by Krzysztof Kozlowski, Mark Brown and Lee Jones. The individual
changes are added on each patch change log.
The 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. It's composed of patches:
[PATCH v2 1/10] mfd: max77686: Convert to use regmap_irq
[PATCH v2 2/10] clk: max77686: add DT include for MAX77686 PMIC clock
[PATCH v2 3/10] Documentation: dt: improve Maxim 77686 PMIC clocks binding
[PATCH v2 4/10] clk: Add generic driver for Maxim PMIC clocks
[PATCH v2 5/10] clk: max77686: convert to the generic max clock driver
[PATCH v2 6/10] mfd: Add driver for Maxim 77802 Power Management IC
[PATCH v2 7/10] regulator: Add driver for Maxim 77802 PMIC regulators
[PATCH v2 8/10] clk: Add driver for Maxim 77802 PMIC clocks
[PATCH v2 9/10] rtc: Add driver for Maxim 77802 PMIC Real-Time-Clock
[PATCH v2 10/10] ARM: dts: Add max77802 device node for exynos5420-peach-pit
Patches 1-3 are improvements to the max77686 driver, Patch 4 adds a generic
clock driver that can be shared by both max77686 and max77802 clock drivers
and Patch 5 converts the former.
Patches 6-9 add support for the different 77802 devices and Patch 10 enables
the MAX77802 PMIC on the Exynos5420 based Peach pit board.
The patch-set has been tested on both Daisy/Snow (max77686) and Peach pit
(max77802) Chromebooks.
NOTE: Since this series convert the max77686 driver to use regmap_irq API
(getting rid of drivers/mfd/max77686-irq.c) and refactor the clock driver,
the amount of duplicated code between 77686 and 77802 drivers were reduced
significantly since v1. Still there is room for more code consolidation if
the max77686 core mfd driver is extended to support max77802 instead.
drivers/mfd/max14577.c is an example of such a combined driver that support
two different Maxim PMIC (14577 and 77836) but I'm not convinced that having
a single driver to support both 77686 and 77802 lead to a cleaner and more
maintainable code than having two separate (and now smaller) mfd core drivers.
Thanks a lot and best regards,
Javier
By using the generic IRQ support in the Register map API, it
is possible to get rid of max77686-irq.c and simplify the code.
Suggested-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
drivers/mfd/Kconfig | 1 +
drivers/mfd/Makefile | 2 +-
drivers/mfd/max77686-irq.c | 319 -----------------------------------
drivers/mfd/max77686.c | 93 +++++++++-
drivers/rtc/rtc-max77686.c | 27 +--
include/linux/mfd/max77686-private.h | 26 ++-
include/linux/mfd/max77686.h | 2 -
7 files changed, 119 insertions(+), 351 deletions(-)
delete mode 100644 drivers/mfd/max77686-irq.c
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index ee8204c..0916447 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -371,6 +371,7 @@ 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 8afedba..3b3b408 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-$(CONFIG_MFD_MAX77693) += max77693.o max77693-irq.o
obj-$(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..42eacb16 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;
}
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..3a810b1 100644
--- a/include/linux/mfd/max77686-private.h
+++ b/include/linux/mfd/max77686-private.h
@@ -205,7 +205,7 @@ 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,
@@ -215,6 +215,25 @@ enum max77686_irq {
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 +243,10 @@ 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
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.
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
.../devicetree/bindings/clock/maxim,max77686.txt | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/Documentation/devicetree/bindings/clock/maxim,max77686.txt b/Documentation/devicetree/bindings/clock/maxim,max77686.txt
index 96ce71b..8dea305 100644
--- a/Documentation/devicetree/bindings/clock/maxim,max77686.txt
+++ b/Documentation/devicetree/bindings/clock/maxim,max77686.txt
@@ -9,13 +9,18 @@ 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.
+
+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 {
@@ -33,6 +38,6 @@ Example: Clock consumer node
foo@0 {
compatible = "bar,foo";
/* ... */
- clock-names = "my-clock";
- clocks = <&max77686 2>;
+ clock-names = "32khz_pmic";
+ clocks = <&max77686 MAX77686_CLK_PMIC>;
};
--
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]>
---
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
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]>
---
drivers/mfd/max77802.c | 1 +
drivers/rtc/Kconfig | 10 +
drivers/rtc/Makefile | 1 +
drivers/rtc/rtc-max77802.c | 637 +++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 649 insertions(+)
create mode 100644 drivers/rtc/rtc-max77802.c
diff --git a/drivers/mfd/max77802.c b/drivers/mfd/max77802.c
index ae73bb4..22bb069 100644
--- a/drivers/mfd/max77802.c
+++ b/drivers/mfd/max77802.c
@@ -39,6 +39,7 @@
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,
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 0754f5c..e0b6495 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 MAX77802"
+ depends on MFD_MAX77802
+ 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..7e5d031
--- /dev/null
+++ b/drivers/rtc/rtc-max77802.c
@@ -0,0 +1,637 @@
+/*
+ * 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/max77802-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)
+/* 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)
+/* 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
+#undef MAX77802_RTC_WTSR_SMPL
+
+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 max77802_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_info(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,
+};
+
+#ifdef MAX77802_RTC_WTSR_SMPL
+static void max77802_rtc_enable_wtsr(struct max77802_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->max77802->regmap,
+ MAX77802_WTSR_SMPL_CNTL, mask, val);
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n",
+ __func__, ret);
+ return;
+ }
+
+ max77802_rtc_update(info, MAX77802_RTC_WRITE);
+}
+
+static void max77802_rtc_enable_smpl(struct max77802_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->max77802->regmap,
+ MAX77802_WTSR_SMPL_CNTL, mask, val);
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n",
+ __func__, ret);
+ return;
+ }
+
+ max77802_rtc_update(info, MAX77802_RTC_WRITE);
+
+ val = 0;
+ regmap_read(info->max77802->regmap, MAX77802_WTSR_SMPL_CNTL, &val);
+ dev_info(info->dev, "%s: WTSR_SMPL(0x%02x)\n", __func__, val);
+}
+#endif /* MAX77802_RTC_WTSR_SMPL */
+
+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, 2);
+ 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);
+
+ /* Mask control register */
+ max77802_rtc_update(info, MAX77802_RTC_READ);
+
+ ret = regmap_update_bits(info->max77802->regmap,
+ MAX77802_RTC_CONTROLM, 0x0, 0x3);
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to mask 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 max77802_dev *max77802 = dev_get_drvdata(pdev->dev.parent);
+ struct max77802_rtc_info *info;
+ int ret;
+
+ dev_info(&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;
+ }
+
+#ifdef MAX77802_RTC_WTSR_SMPL
+ max77802_rtc_enable_wtsr(info, true);
+ max77802_rtc_enable_smpl(info, true);
+#endif
+
+ 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)) {
+ dev_info(&pdev->dev, "%s: fail\n", __func__);
+
+ 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,
+ MAX77802_RTCIRQ_RTCA1);
+
+ if (info->virq <= 0) {
+ dev_err(&pdev->dev, "Failed to get virtual IRQ %d\n",
+ MAX77802_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;
+}
+
+static int max77802_rtc_remove(struct platform_device *pdev)
+{
+ struct max77802_rtc_info *info = platform_get_drvdata(pdev);
+
+ free_irq(info->virq, info);
+ rtc_device_unregister(info->rtc_dev);
+
+ return 0;
+}
+
+static void max77802_rtc_shutdown(struct platform_device *pdev)
+{
+#ifdef MAX77802_RTC_WTSR_SMPL
+ struct max77802_rtc_info *info = platform_get_drvdata(pdev);
+ int i;
+ u8 val = 0;
+
+ for (i = 0; i < 3; i++) {
+ max77802_rtc_enable_wtsr(info, false);
+ regmap_read(info->max77802->regmap,
+ MAX77802_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 */
+ max77802_rtc_enable_smpl(info, false);
+#endif /* MAX77802_RTC_WTSR_SMPL */
+}
+
+#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,
+ .remove = max77802_rtc_remove,
+ .shutdown = max77802_rtc_shutdown,
+ .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
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]>
---
drivers/clk/Kconfig | 3 +
drivers/clk/Makefile | 1 +
drivers/clk/clk-max-gen.c | 197 ++++++++++++++++++++++++++++++++++++++++++++++
drivers/clk/clk-max-gen.h | 32 ++++++++
4 files changed, 233 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..aa9ebbe
--- /dev/null
+++ b/drivers/clk/clk-max-gen.c
@@ -0,0 +1,197 @@
+/*
+ * clk-max-gen.c - Generic clock driver for Maxim PMICs clocks
+ *
+ * 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>
+
+struct max_gen_clk {
+ struct regmap *regmap;
+ u32 mask;
+ u32 reg;
+ struct clk_hw hw;
+ struct clk_lookup *lookup;
+};
+
+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,
+};
+
+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;
+
+ clk = clk_register(dev, hw);
+ if (IS_ERR(clk))
+ return clk;
+
+ max_gen->lookup = kzalloc(sizeof(struct clk_lookup), GFP_KERNEL);
+ if (!max_gen->lookup)
+ return ERR_PTR(-ENOMEM);
+
+ max_gen->lookup->con_id = hw->init->name;
+ max_gen->lookup->clk = clk;
+
+ clkdev_add(max_gen->lookup);
+
+ 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;
+
+ 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] = devm_kzalloc(dev, sizeof(struct max_gen_clk),
+ GFP_KERNEL);
+ if (!max_gen_clks[i])
+ 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;
+ max_gen_clks[i]->hw.init = &clks_init[i];
+
+ 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);
+ goto err_clocks;
+ }
+ }
+
+ 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) {
+ ret = -ENOMEM;
+ goto err_clocks;
+ }
+
+ 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");
+ goto err_clocks;
+ }
+ }
+
+ return 0;
+
+err_clocks:
+ for (--i; i >= 0; --i) {
+ clkdev_drop(max_gen_clks[i]->lookup);
+ clk_unregister(max_gen_clks[i]->hw.clk);
+ }
+
+ return ret;
+}
+
+int max_gen_clk_remove(struct platform_device *pdev, int num_init)
+{
+ struct clk **clocks = platform_get_drvdata(pdev);
+ struct device *dev = pdev->dev.parent;
+ int i;
+
+ if (dev->of_node)
+ of_clk_del_provider(dev->of_node);
+
+ for (i = 0; i < num_init; i++) {
+ struct clk_hw *hw = __clk_get_hw(clocks[i]);
+ struct max_gen_clk *max_gen = to_max_gen_clk(hw);
+
+ clkdev_drop(max_gen->lookup);
+ clk_unregister(clocks[i]);
+ }
+ return 0;
+}
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
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]>
---
Changes since v1:
- Remove unneeded check if num_regulators != MAX77802_MAX_REGULATORS.
- Fix .set_suspend_mode handler comment and split regulators ops for
regulators that behave differently. Suggested by Mark Brown.
- Use module_platform_driver() instead of having init/exit functions.
Suggested by Mark Brown.
- Use the new descriptor-based GPIO interface instead of the deprecated
integer based GPIO one. Suggested by Mark Brown.
- Look for "regulators" child node instead of "voltage-regulators" to be
consistent with other PMIC drivers. Suggested by Mark Brown.
drivers/mfd/max77802.c | 1 +
drivers/regulator/Kconfig | 9 +
drivers/regulator/Makefile | 1 +
drivers/regulator/max77802.c | 701 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 712 insertions(+)
create mode 100644 drivers/regulator/max77802.c
diff --git a/drivers/mfd/max77802.c b/drivers/mfd/max77802.c
index c29fcdd..c9dcbab 100644
--- a/drivers/mfd/max77802.c
+++ b/drivers/mfd/max77802.c
@@ -37,6 +37,7 @@
#include <linux/err.h>
static const struct mfd_cell max77802_devs[] = {
+ { .name = "max77802-pmic", },
};
static bool max77802_pmic_is_accessible_reg(struct device *dev,
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 789eb46..17873d3 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_MAX77802
+ help
+ This driver controls a Maxim 77802 regulator
+ via I2C bus. The provided regulator is suitable for
+ Exynos-5 chips 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..e1609b5
--- /dev/null
+++ b/drivers/regulator/max77802.c
@@ -0,0 +1,701 @@
+/*
+ * 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/max77802.h>
+#include <linux/mfd/max77802-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
+
+/* LDO16, LDO22 and LDO31 are not available on MAX77802 */
+#define MAX77802_MAX_REGULATORS (MAX77802_REG_MAX - 3)
+
+/* 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_MAX_REGULATORS];
+ unsigned int opmode[MAX77802_MAX_REGULATORS];
+};
+
+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:
+ pr_warn("%s: regulator_suspend_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:
+ pr_warn("%s: regulator_suspend_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 */
+ pr_warn("%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) {
+ pr_warn("%s: regulator_suspend_mode: 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, log) { \
+ .name = "LDO"#num, \
+ .id = MAX77802_LDO##num, \
+ .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, log) { \
+ .name = "LDO"#num, \
+ .id = MAX77802_LDO##num, \
+ .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, \
+ .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, \
+ .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, \
+ .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, \
+ .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_n_ldo(1, 2),
+ regulator_77802_desc_n_ldo(2, 1),
+ regulator_77802_desc_p_ldo(3, 2),
+ regulator_77802_desc_p_ldo(4, 1),
+ regulator_77802_desc_p_ldo(5, 1),
+ regulator_77802_desc_p_ldo(6, 1),
+ regulator_77802_desc_p_ldo(7, 1),
+ regulator_77802_desc_n_ldo(8, 1),
+ regulator_77802_desc_p_ldo(9, 1),
+ regulator_77802_desc_p_ldo(10, 1),
+ regulator_77802_desc_p_ldo(11, 1),
+ regulator_77802_desc_p_ldo(12, 1),
+ regulator_77802_desc_p_ldo(13, 1),
+ regulator_77802_desc_p_ldo(14, 1),
+ regulator_77802_desc_n_ldo(15, 1),
+ regulator_77802_desc_n_ldo(17, 1),
+ regulator_77802_desc_p_ldo(18, 1),
+ regulator_77802_desc_p_ldo(19, 1),
+ regulator_77802_desc_p_ldo(20, 2),
+ regulator_77802_desc_p_ldo(21, 2),
+ regulator_77802_desc_p_ldo(23, 1),
+ regulator_77802_desc_p_ldo(24, 1),
+ regulator_77802_desc_p_ldo(25, 1),
+ regulator_77802_desc_p_ldo(26, 1),
+ regulator_77802_desc_n_ldo(27, 1),
+ regulator_77802_desc_p_ldo(28, 1),
+ regulator_77802_desc_p_ldo(29, 1),
+ regulator_77802_desc_n_ldo(30, 1),
+ regulator_77802_desc_p_ldo(32, 1),
+ regulator_77802_desc_p_ldo(33, 1),
+ regulator_77802_desc_p_ldo(34, 1),
+ regulator_77802_desc_n_ldo(35, 1),
+ 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),
+};
+
+#ifdef CONFIG_OF
+static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev,
+ struct max77802_platform_data *pdata)
+{
+ struct max77802_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct device_node *pmic_np, *regulators_np;
+ struct max77802_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 max77802_platform_data *pdata)
+{
+ return 0;
+}
+#endif /* CONFIG_OF */
+
+/**
+ * max77802_setup_gpios - init DVS-related GPIOs
+ *
+ * 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.
+ */
+static int max77802_setup_gpios(struct device *dev,
+ struct max77802_platform_data *pdata)
+{
+ int buck_default_idx = pdata->buck_default_idx;
+ int ret;
+ int i;
+
+ /* Set all SELB high to avoid glitching while DVS is changing */
+ for (i = 0; i < ARRAY_SIZE(pdata->buck_gpio_selb); i++) {
+ struct gpio_desc *gpio = pdata->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(pdata->buck_gpio_dvs); i++) {
+ struct gpio_desc *gpio = pdata->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(pdata->buck_gpio_selb); i++) {
+ struct gpio_desc *gpio = pdata->buck_gpio_selb[i];
+
+ if (!IS_ERR(gpio))
+ gpiod_set_value(gpio, 0);
+ }
+
+ return 0;
+}
+
+/**
+ * max77802_read_gpios - read the current state of the dvs GPIOs
+ *
+ * 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
+ */
+static int max77802_read_gpios(struct max77802_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;
+}
+
+static inline bool max77802_is_dvs_buck(int id)
+{
+ /* on 77802 bucks 1-4, 6 are */
+ return ((id >= MAX77802_BUCK1 && id <= MAX77802_BUCK4) ||
+ (id == MAX77802_BUCK6));
+}
+
+static void max77802_copy_reg(struct device *dev, struct regmap *regmap,
+ int from_reg, int to_reg)
+{
+ int val;
+ int ret;
+
+ if (from_reg == to_reg)
+ return;
+
+ ret = regmap_read(regmap, from_reg, &val);
+ if (!ret)
+ ret = regmap_write(regmap, to_reg, val);
+
+ if (ret)
+ dev_warn(dev, "Copy err %d => %d (%d)\n",
+ from_reg, to_reg, ret);
+}
+
+static int max77802_pmic_probe(struct platform_device *pdev)
+{
+ struct max77802_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct max77802_platform_data *pdata = dev_get_platdata(iodev->dev);
+ struct max77802_regulator_prv *max77802;
+ 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__);
+
+ /* 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 = &pdev->dev;
+ config.regmap = iodev->regmap;
+ config.driver_data = max77802;
+ platform_set_drvdata(pdev, max77802);
+
+ buck_default_idx = pdata->buck_default_idx;
+ buck_old_idx = max77802_read_gpios(pdata);
+
+ for (i = 0; i < MAX77802_MAX_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;
+
+ max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
+
+ if (max77802_is_dvs_buck(id)) {
+ /* Try to copy over data so we keep firmware settings */
+ reg = regulators[i].vsel_reg;
+ max77802_copy_reg(&pdev->dev, iodev->regmap,
+ reg + buck_old_idx,
+ reg + buck_default_idx);
+ 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 = max77802_setup_gpios(&pdev->dev, pdata);
+ 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
Peach pit board 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
is 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]>
---
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 | 320 +++++++++++++++++++++++++++++
1 file changed, 320 insertions(+)
diff --git a/arch/arm/boot/dts/exynos5420-peach-pit.dts b/arch/arm/boot/dts/exynos5420-peach-pit.dts
index 1c5b8f9..e6dc972 100644
--- a/arch/arm/boot/dts/exynos5420-peach-pit.dts
+++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts
@@ -111,6 +111,13 @@
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>;
@@ -124,6 +131,29 @@
samsung,pin-pud = <3>;
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 {
@@ -140,6 +170,14 @@
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 {
@@ -189,6 +227,288 @@
};
};
+&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 */
+ max77802,pmic-buck-default-dvs-idx = <1>;
+ max77802,pmic-buck-dvs-gpios = <&gpy7 6 0>,
+ <&gpj4 2 0>,
+ <&gpj4 3 0>;
+ max77802,pmic-buck-selb-gpios = <&gph0 2 0>,
+ <&gph0 3 0>,
+ <&gph0 4 0>,
+ <&gph0 5 0>,
+ <&gph0 6 0>;
+
+ regulators {
+ 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 = "ld0_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>;
+ };
+ 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;
+ };
+ };
+ };
+};
+
&hsi2c_7 {
status = "okay";
--
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]>
---
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.
.../devicetree/bindings/clock/maxim,max77802.txt | 42 +++++++++
drivers/clk/Kconfig | 7 ++
drivers/clk/Makefile | 1 +
drivers/clk/clk-max77802.c | 99 ++++++++++++++++++++++
drivers/mfd/max77802.c | 1 +
include/dt-bindings/clock/maxim,max77802.h | 22 +++++
6 files changed, 172 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/maxim,max77802.txt
create mode 100644 drivers/clk/clk-max77802.c
create mode 100644 include/dt-bindings/clock/maxim,max77802.h
diff --git a/Documentation/devicetree/bindings/clock/maxim,max77802.txt b/Documentation/devicetree/bindings/clock/maxim,max77802.txt
new file mode 100644
index 0000000..b2c2129
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/maxim,max77802.txt
@@ -0,0 +1,42 @@
+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 presend in main device node of the MFD chip.
+
+Required properties:
+
+- #clock-cells: from common clock binding; shall be set to 1.
+
+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 = "32khz_ap";
+ clocks = <&max77802 MAX77802_CLK_32K_AP>;
+ };
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 3fd4270..221260b 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 MFD"
+ depends on MFD_MAX77802
+ 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..4253b44
--- /dev/null
+++ b/drivers/clk/clk-max77802.c
@@ -0,0 +1,99 @@
+/*
+ * 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/max77802.h>
+#include <linux/mfd/max77802-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 max77802_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/drivers/mfd/max77802.c b/drivers/mfd/max77802.c
index c9dcbab..ae73bb4 100644
--- a/drivers/mfd/max77802.c
+++ b/drivers/mfd/max77802.c
@@ -38,6 +38,7 @@
static const struct mfd_cell max77802_devs[] = {
{ .name = "max77802-pmic", },
+ { .name = "max77802-clk", },
};
static bool max77802_pmic_is_accessible_reg(struct device *dev,
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
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 the core support for 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]>
---
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
integer based GPIO one. Suggested by Mark Brown.
- Remove the type parameter from i2c_device_id table since was not used.
- Fix device not found error message and remove unneeded device found message.
Documentation/devicetree/bindings/mfd/max77802.txt | 87 +++++
drivers/mfd/Kconfig | 14 +
drivers/mfd/Makefile | 1 +
drivers/mfd/max77802.c | 362 +++++++++++++++++++++
include/linux/mfd/max77802-private.h | 309 ++++++++++++++++++
include/linux/mfd/max77802.h | 124 +++++++
6 files changed, 897 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/max77802.txt
create mode 100644 drivers/mfd/max77802.c
create mode 100644 include/linux/mfd/max77802-private.h
create mode 100644 include/linux/mfd/max77802.h
diff --git a/Documentation/devicetree/bindings/mfd/max77802.txt b/Documentation/devicetree/bindings/mfd/max77802.txt
new file mode 100644
index 0000000..e6c4860
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/max77802.txt
@@ -0,0 +1,87 @@
+Maxim MAX77802 multi-function device
+
+MAX77802 is a Mulitifunction 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
+
+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:
+- max77802,pmic-buck-default-dvs-idx: We'll always write this DVS index in the
+ PMIC for BUCKs with DVS (Bucks 1-4, 6).
+ 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.
+
+- max77802,pmic-buck-dvs-gpios: The DVS GPIOs. 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.
+
+- max77802,pmic-buck-selb-gpios: GPIOs to enable DVS-GPIO for BUCKs.
+ 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:
+
+ -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>;
+
+ max77802,pmic-buck-default-dvs-idx = <1>;
+ max77802,pmic-buck-dvs-gpios = <&gpy7 6 0>,
+ <&gpj4 2 0>,
+ <&gpj4 3 0>;
+ max77802,pmic-buck-selb-gpios = <&gph0 2 0>,
+ <&gph0 3 0>,
+ <&gph0 4 0>,
+ <&gph0 5 0>,
+ <&gph0 6 0>;
+
+ regulators {
+ ldo11_reg: LDO11 {
+ regulator-compatible = "LDO11";
+ regulator-name = "vdd_ldo11";
+ regulator-min-microvolt = <1900000>;
+ regulator-max-microvolt = <1900000>;
+ regulator-always-on;
+ };
+
+ buck1_reg {
+ regulator-compatible = "BUCK1";
+ regulator-name = "vdd_mif";
+ regulator-min-microvolt = <950000>;
+ regulator-max-microvolt = <1300000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+ };
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 0916447..dcec3b7 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -393,6 +393,20 @@ config MFD_MAX77693
additional drivers must be enabled in order to use the functionality
of the device.
+config MFD_MAX77802
+ tristate "Maxim Integrated MAX77802 PMIC Support"
+ depends on I2C=y
+ select MFD_CORE
+ select REGMAP_I2C
+ select REGMAP_IRQ
+ select IRQ_DOMAIN
+ help
+ Say yes here to support for Maxim Integrated MAX77802.
+ This is a Power Management IC with 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.
+
config MFD_MAX8907
tristate "Maxim Semiconductor MAX8907 PMIC Support"
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 3b3b408..8108ae6 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -117,6 +117,7 @@ obj-$(CONFIG_MFD_DA9063) += da9063.o
obj-$(CONFIG_MFD_MAX14577) += max14577.o
obj-$(CONFIG_MFD_MAX77686) += max77686.o
obj-$(CONFIG_MFD_MAX77693) += max77693.o max77693-irq.o
+obj-$(CONFIG_MFD_MAX77802) += max77802.o
obj-$(CONFIG_MFD_MAX8907) += max8907.o
max8925-objs := max8925-core.o max8925-i2c.o
obj-$(CONFIG_MFD_MAX8925) += max8925.o
diff --git a/drivers/mfd/max77802.c b/drivers/mfd/max77802.c
new file mode 100644
index 0000000..c29fcdd
--- /dev/null
+++ b/drivers/mfd/max77802.c
@@ -0,0 +1,362 @@
+/*
+ * max77802.c - mfd core 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/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>
+#include <linux/gpio/consumer.h>
+#include <linux/mfd/max77802.h>
+#include <linux/mfd/max77802-private.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/err.h>
+
+static const struct mfd_cell max77802_devs[] = {
+};
+
+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 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 max77802_irqs[] = {
+ /* INT1 interrupts */
+ { .reg_offset = 0, .mask = MAX77802_INT1_PWRONF_MSK, },
+ { .reg_offset = 0, .mask = MAX77802_INT1_PWRONR_MSK, },
+ { .reg_offset = 0, .mask = MAX77802_INT1_JIGONBF_MSK, },
+ { .reg_offset = 0, .mask = MAX77802_INT1_JIGONBR_MSK, },
+ { .reg_offset = 0, .mask = MAX77802_INT1_ACOKBF_MSK, },
+ { .reg_offset = 0, .mask = MAX77802_INT1_ACOKBR_MSK, },
+ { .reg_offset = 0, .mask = MAX77802_INT1_ONKEY1S_MSK, },
+ { .reg_offset = 0, .mask = MAX77802_INT1_MRSTB_MSK, },
+ /* INT2 interrupts */
+ { .reg_offset = 1, .mask = MAX77802_INT2_140C_MSK, },
+ { .reg_offset = 1, .mask = MAX77802_INT2_120C_MSK, },
+};
+
+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 = max77802_irqs,
+ .num_irqs = ARRAY_SIZE(max77802_irqs),
+};
+
+static const struct regmap_irq max77802_rtc_irqs[] = {
+ /* RTC interrupts */
+ { .reg_offset = 0, .mask = MAX77802_RTCINT_RTC60S_MSK, },
+ { .reg_offset = 0, .mask = MAX77802_RTCINT_RTCA1_MSK, },
+ { .reg_offset = 0, .mask = MAX77802_RTCINT_RTCA2_MSK, },
+ { .reg_offset = 0, .mask = MAX77802_RTCINT_SMPL_MSK, },
+ { .reg_offset = 0, .mask = MAX77802_RTCINT_RTC1S_MSK, },
+ { .reg_offset = 0, .mask = MAX77802_RTCINT_WTSR_MSK, },
+};
+
+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 = max77802_rtc_irqs,
+ .num_irqs = ARRAY_SIZE(max77802_rtc_irqs),
+};
+
+#ifdef CONFIG_OF
+static struct of_device_id max77802_pmic_dt_match[] = {
+ {.compatible = "maxim,max77802", .data = NULL},
+ {},
+};
+
+static void max77802_dt_parse_dvs_gpio(struct device *dev,
+ struct max77802_platform_data *pd,
+ struct device_node *np)
+{
+ 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, "max77802,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, "max77802,pmic-buck-selb", i);
+}
+
+static struct max77802_platform_data *max77802_i2c_parse_dt_pdata(struct device
+ *dev)
+{
+ struct device_node *np = dev->of_node;
+ struct max77802_platform_data *pd;
+
+ pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
+ if (!pd) {
+ dev_err(dev, "could not allocate memory for pdata\n");
+ return NULL;
+ }
+
+ /* Read default index and ignore errors, since default is 0 */
+ of_property_read_u32(np, "max77802,pmic-buck-default-dvs-idx",
+ &pd->buck_default_idx);
+
+ max77802_dt_parse_dvs_gpio(dev, pd, np);
+
+ dev->platform_data = pd;
+ return pd;
+}
+#else
+static struct max77802_platform_data *max77802_i2c_parse_dt_pdata(struct device
+ *dev)
+{
+ return 0;
+}
+#endif
+
+static int max77802_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct max77802_dev *max77802 = NULL;
+ struct max77802_platform_data *pdata = dev_get_platdata(&i2c->dev);
+ unsigned int data;
+ int ret = 0;
+
+ if (i2c->dev.of_node)
+ pdata = max77802_i2c_parse_dt_pdata(&i2c->dev);
+
+ if (!pdata) {
+ dev_err(&i2c->dev, "No platform data found.\n");
+ return -EIO;
+ }
+
+ max77802 = devm_kzalloc(&i2c->dev, sizeof(struct max77802_dev),
+ GFP_KERNEL);
+ if (max77802 == NULL)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, max77802);
+
+ max77802->dev = &i2c->dev;
+ max77802->i2c = i2c;
+ max77802->type = id->driver_data;
+
+ max77802->wakeup = pdata->wakeup;
+ max77802->irq = i2c->irq;
+
+ max77802->regmap = devm_regmap_init_i2c(i2c, &max77802_regmap_config);
+ if (IS_ERR(max77802->regmap)) {
+ ret = PTR_ERR(max77802->regmap);
+ dev_err(max77802->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ if (regmap_read(max77802->regmap,
+ MAX77802_REG_DEVICE_ID, &data) < 0) {
+ dev_err(max77802->dev,
+ "device not found on this channel\n");
+ return -ENODEV;
+ }
+
+ ret = regmap_add_irq_chip(max77802->regmap, max77802->irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
+ IRQF_SHARED, 0, &max77802_irq_chip,
+ &max77802->irq_data);
+ if (ret != 0) {
+ dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
+ return ret;
+ }
+ ret = regmap_add_irq_chip(max77802->regmap, max77802->irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
+ IRQF_SHARED, 0, &max77802_rtc_irq_chip,
+ &max77802->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(max77802->dev, -1, max77802_devs,
+ ARRAY_SIZE(max77802_devs), NULL, 0, NULL);
+ if (ret < 0) {
+ 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(max77802->irq, max77802->rtc_irq_data);
+err_del_irqc:
+ regmap_del_irq_chip(max77802->irq, max77802->irq_data);
+ return ret;
+}
+
+static int max77802_i2c_remove(struct i2c_client *i2c)
+{
+ struct max77802_dev *max77802 = i2c_get_clientdata(i2c);
+
+ mfd_remove_devices(max77802->dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id max77802_i2c_id[] = {
+ { "max77802", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max77802_i2c_id);
+
+#ifdef CONFIG_PM_SLEEP
+static int max77802_suspend(struct device *dev)
+{
+ struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+ struct max77802_dev *max77802 = i2c_get_clientdata(i2c);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(max77802->irq);
+
+ disable_irq(max77802->irq);
+
+ return 0;
+}
+
+static int max77802_resume(struct device *dev)
+{
+ struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+ struct max77802_dev *max77802 = i2c_get_clientdata(i2c);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(max77802->irq);
+
+ enable_irq(max77802->irq);
+
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(max77802_pm, max77802_suspend, max77802_resume);
+
+static struct i2c_driver max77802_i2c_driver = {
+ .driver = {
+ .name = "max77802",
+ .owner = THIS_MODULE,
+ .pm = &max77802_pm,
+ .of_match_table = of_match_ptr(max77802_pmic_dt_match),
+ },
+ .probe = max77802_i2c_probe,
+ .remove = max77802_i2c_remove,
+ .id_table = max77802_i2c_id,
+};
+
+static int __init max77802_i2c_init(void)
+{
+ return i2c_add_driver(&max77802_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(max77802_i2c_init);
+
+static void __exit max77802_i2c_exit(void)
+{
+ i2c_del_driver(&max77802_i2c_driver);
+}
+module_exit(max77802_i2c_exit);
+
+MODULE_DESCRIPTION("MAXIM 77802 multi-function core driver");
+MODULE_AUTHOR("Simon Glass <[email protected]>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/max77802-private.h b/include/linux/mfd/max77802-private.h
new file mode 100644
index 0000000..81bc90d
--- /dev/null
+++ b/include/linux/mfd/max77802-private.h
@@ -0,0 +1,309 @@
+/*
+ * max77802-private.h - Voltage regulator driver for the Maxim 77802
+ *
+ * Copyright (C) 2012 Samsung Electrnoics
+ * 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.
+ *
+ */
+
+#ifndef __LINUX_MFD_MAX77802_PRIV_H
+#define __LINUX_MFD_MAX77802_PRIV_H
+
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/module.h>
+
+#define MAX77802_REG_INVALID (0xff)
+
+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,
+};
+
+#define MAX77802_IRQSRC_PMIC (0)
+#define MAX77802_IRQSRC_RTC BIT(0)
+
+enum max77802_irq_source {
+ PMIC_INT1 = 0,
+ PMIC_INT2,
+ RTC_INT,
+
+ MAX77802_IRQ_GROUP_NR,
+};
+
+enum max77802_irq {
+ MAX77802_PMICIRQ_PWRONF,
+ MAX77802_PMICIRQ_PWRONR,
+ MAX77802_PMICIRQ_JIGONBF,
+ MAX77802_PMICIRQ_JIGONBR,
+ MAX77802_PMICIRQ_ACOKBF,
+ MAX77802_PMICIRQ_ACOKBR,
+ MAX77802_PMICIRQ_ONKEY1S,
+ MAX77802_PMICIRQ_MRSTB,
+
+ MAX77802_PMICIRQ_140C,
+ MAX77802_PMICIRQ_120C,
+
+ MAX77802_RTCIRQ_RTC60S = 0,
+ MAX77802_RTCIRQ_RTCA1,
+ MAX77802_RTCIRQ_RTCA2,
+ MAX77802_RTCIRQ_SMPL,
+ MAX77802_RTCIRQ_RTC1S,
+ MAX77802_RTCIRQ_WTSR,
+
+ MAX77802_IRQ_NR,
+};
+
+#define MAX77802_INT1_PWRONF_MSK BIT(0)
+#define MAX77802_INT1_PWRONR_MSK BIT(1)
+#define MAX77802_INT1_JIGONBF_MSK BIT(2)
+#define MAX77802_INT1_JIGONBR_MSK BIT(3)
+#define MAX77802_INT1_ACOKBF_MSK BIT(4)
+#define MAX77802_INT1_ACOKBR_MSK BIT(5)
+#define MAX77802_INT1_ONKEY1S_MSK BIT(6)
+#define MAX77802_INT1_MRSTB_MSK BIT(7)
+
+#define MAX77802_INT2_140C_MSK BIT(0)
+#define MAX77802_INT2_120C_MSK BIT(1)
+
+#define MAX77802_RTCINT_RTC60S_MSK BIT(0)
+#define MAX77802_RTCINT_RTCA1_MSK BIT(1)
+#define MAX77802_RTCINT_RTCA2_MSK BIT(2)
+#define MAX77802_RTCINT_SMPL_MSK BIT(3)
+#define MAX77802_RTCINT_RTC1S_MSK BIT(4)
+#define MAX77802_RTCINT_WTSR_MSK BIT(5)
+
+struct max77802_dev {
+ struct device *dev;
+ struct i2c_client *i2c; /* 0x09 / PMIC, Battery Control and RTC */
+
+ int type;
+
+ struct regmap *regmap; /* regmap for mfd and rtc devices */
+ struct regmap_irq_chip_data *irq_data;
+ struct regmap_irq_chip_data *rtc_irq_data;
+
+ int irq;
+ bool wakeup;
+ struct mutex irqlock;
+ int irq_masks_cur[MAX77802_IRQ_GROUP_NR];
+ int irq_masks_cache[MAX77802_IRQ_GROUP_NR];
+};
+
+enum max77802_types {
+ TYPE_MAX77802,
+};
+
+extern int max77802_irq_init(struct max77802_dev *max77802);
+extern void max77802_irq_exit(struct max77802_dev *max77802);
+extern int max77802_irq_resume(struct max77802_dev *max77802);
+
+#endif /* __LINUX_MFD_MAX77802_PRIV_H */
diff --git a/include/linux/mfd/max77802.h b/include/linux/mfd/max77802.h
new file mode 100644
index 0000000..86fb751
--- /dev/null
+++ b/include/linux/mfd/max77802.h
@@ -0,0 +1,124 @@
+/*
+ * max77802.h - Driver for the Maxim 77802
+ *
+ * Copyright (c) 2013-2014 Google, Inc
+ *
+ * Copyright (C) 2012 Samsung Electrnoics
+ * 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.
+ *
+ * This driver is based on max8997.h
+ *
+ * MAX77802 has PMIC, RTC devices.
+ * The devices share the same I2C bus and included in
+ * this mfd driver.
+ */
+
+#ifndef __LINUX_MFD_MAX77802_H
+#define __LINUX_MFD_MAX77802_H
+
+#include <linux/regulator/consumer.h>
+
+/* MAX77802 regulator IDs - LDOS must come before BUCKs */
+enum max77802_regulators {
+ MAX77802_LDO1 = 0,
+ 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_LDO16,
+ MAX77802_LDO17,
+ MAX77802_LDO18,
+ MAX77802_LDO19,
+ MAX77802_LDO20,
+ MAX77802_LDO21,
+ MAX77802_LDO22,
+ MAX77802_LDO23,
+ MAX77802_LDO24,
+ MAX77802_LDO25,
+ MAX77802_LDO26,
+ MAX77802_LDO27,
+ MAX77802_LDO28,
+ MAX77802_LDO29,
+ MAX77802_LDO30,
+ MAX77802_LDO31,
+ MAX77802_LDO32,
+ MAX77802_LDO33,
+ MAX77802_LDO34,
+ MAX77802_LDO35,
+ MAX77802_BUCK1,
+ MAX77802_BUCK2,
+ MAX77802_BUCK3,
+ MAX77802_BUCK4,
+ MAX77802_BUCK5,
+ MAX77802_BUCK6,
+ MAX77802_BUCK7,
+ MAX77802_BUCK8,
+ MAX77802_BUCK9,
+ MAX77802_BUCK10,
+
+ MAX77802_REG_MAX,
+};
+
+struct max77802_regulator_data {
+ int id;
+ int opmode;
+ struct regulator_init_data *initdata;
+ struct device_node *of_node;
+};
+
+enum max77802_opmode {
+ MAX77802_OPMODE_OFF,
+ MAX77802_OPMODE_STANDBY,
+ MAX77802_OPMODE_LP,
+ MAX77802_OPMODE_NORMAL,
+};
+
+struct max77802_opmode_data {
+ int id;
+ int mode;
+};
+
+struct max77802_platform_data {
+ /* IRQ */
+ int irq_gpio;
+ int ono;
+ int wakeup;
+
+ /* ---- PMIC ---- */
+ struct max77802_regulator_data *regulators;
+ int num_regulators;
+
+ struct max77802_opmode_data *opmode_data;
+
+ /*
+ * GPIO-DVS feature is not fully enabled with the current version of
+ * MAX77802 driver, but the driver does support using a DVS index other
+ * than the default of 0.
+ */
+ 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[5]; /* 77802: 1, 2, 3, 4, 6 */
+};
+
+#endif /* __LINUX_MFD_MAX77802_H */
--
2.0.0.rc2
This patch adds a dt-binding include for Maxim 77686
PMIC clock IDs that can be to be shared between the
clk-max77686 clock driver and DeviceTree source files.
Signed-off-by: Javier Martinez Canillas <[email protected]>
---
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
On Mon, Jun 16, 2014 at 08:02:35PM +0200, Javier Martinez Canillas wrote:
> --- a/drivers/mfd/max77802.c
> +++ b/drivers/mfd/max77802.c
> @@ -37,6 +37,7 @@
> #include <linux/err.h>
>
> static const struct mfd_cell max77802_devs[] = {
> + { .name = "max77802-pmic", },
> };
>
> static bool max77802_pmic_is_accessible_reg(struct device *dev,
Please don't do things like this, it makes it harder to apply your
series. Just register all the devices in the MFD when you add the MFD
driver.
> + default:
> + pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
> + rdev->desc->name, mode);
> + return -EINVAL;
dev_warn().
> +static void max77802_copy_reg(struct device *dev, struct regmap *regmap,
> + int from_reg, int to_reg)
> +{
> + int val;
> + int ret;
> +
> + if (from_reg == to_reg)
> + return;
> +
> + ret = regmap_read(regmap, from_reg, &val);
> + if (!ret)
> + ret = regmap_write(regmap, to_reg, val);
> +
> + if (ret)
> + dev_warn(dev, "Copy err %d => %d (%d)\n",
> + from_reg, to_reg, ret);
> +}
Again, this looks like it should be generic.
> +static int max77802_pmic_probe(struct platform_device *pdev)
> +{
> + dev_dbg(&pdev->dev, "%s\n", __func__);
This isn't adding anything, just remove it - the core already logs
probes if you want.
> + config.dev = &pdev->dev;
Are you sure this shouldn't be the MFD?
> + for (i = 0; i < MAX77802_MAX_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;
> +
> + max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
Why isn't this being read from the hardware, this may lead to a
configuration change the first time we pay attention?
On Mon, Jun 16, 2014 at 08:02:34PM +0200, Javier Martinez Canillas wrote:
> +- max77802,pmic-buck-dvs-gpios: The DVS GPIOs. 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.
I can't tell from reading this what the property means exactly - I
expect it is an array of the GPIOs in some order but that order isn't
specified.
> +config MFD_MAX77802
> + tristate "Maxim Integrated MAX77802 PMIC Support"
> + depends on I2C=y
> + select MFD_CORE
> + select REGMAP_I2C
> + select REGMAP_IRQ
> + select IRQ_DOMAIN
> + help
> + Say yes here to support for Maxim Integrated MAX77802.
> + This is a Power Management IC with 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.
> +
It is a bit unorthodox to put the build infrastructure in the same patch
as the DT binding...
Hello Mark,
Thanks a lot for your feedback.
On 06/16/2014 09:25 PM, Mark Brown wrote:
> On Mon, Jun 16, 2014 at 08:02:35PM +0200, Javier Martinez Canillas wrote:
>
>> --- a/drivers/mfd/max77802.c
>> +++ b/drivers/mfd/max77802.c
>> @@ -37,6 +37,7 @@
>> #include <linux/err.h>
>>
>> static const struct mfd_cell max77802_devs[] = {
>> + { .name = "max77802-pmic", },
>> };
>>
>> static bool max77802_pmic_is_accessible_reg(struct device *dev,
>
> Please don't do things like this, it makes it harder to apply your
> series. Just register all the devices in the MFD when you add the MFD
> driver.
>
Ok, I'll do that. After all mfd core just omits the devices that don't match.
>> + default:
>> + pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
>> + rdev->desc->name, mode);
>> + return -EINVAL;
>
> dev_warn().
>
Ok.
>> +static void max77802_copy_reg(struct device *dev, struct regmap *regmap,
>> + int from_reg, int to_reg)
>> +{
>> + int val;
>> + int ret;
>> +
>> + if (from_reg == to_reg)
>> + return;
>> +
>> + ret = regmap_read(regmap, from_reg, &val);
>> + if (!ret)
>> + ret = regmap_write(regmap, to_reg, val);
>> +
>> + if (ret)
>> + dev_warn(dev, "Copy err %d => %d (%d)\n",
>> + from_reg, to_reg, ret);
>> +}
>
> Again, this looks like it should be generic.
>
Yes, I missed this from your previous feedback, sorry about that.
I'll add a regmap_copy_reg() function to drivers/base/regmap/regmap.c instead.
>> +static int max77802_pmic_probe(struct platform_device *pdev)
>> +{
>
>> + dev_dbg(&pdev->dev, "%s\n", __func__);
>
> This isn't adding anything, just remove it - the core already logs
> probes if you want.
>
Ok.
>> + config.dev = &pdev->dev;
>
> Are you sure this shouldn't be the MFD?
>
I just looked at regulator_register() and saw that it does rdev->dev.parent =
dev, so yes this has to be the MFD.
>> + for (i = 0; i < MAX77802_MAX_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;
>> +
>> + max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
>
> Why isn't this being read from the hardware, this may lead to a
> configuration change the first time we pay attention?
>
The original Chrome OS driver [0] had a "regulator-op-mode" property similar to
"op_mode" in Documentation/devicetree/bindings/regulator/s5m8767-regulator.txt
to specify the operating mode using DT.
But I removed that since I didn't want to have a specific property for what
appears to be a generic need. I wanted to re-post something along the lines of
what was discussed in [1] and add operating mode support to the generic
regulator code.
So, for now I thought it made sense to set the operating mode to normal on
probe() but I'll change it to read from the hardware if that is better.
I guess I should check in the datasheet if a sane default operating mode for
LDOs is expected when the chip is reseted or if this is left undefined and also
if the bootloader already set this.
Best regards,
Javier
[0]:
https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-3.8/Documentation/devicetree/bindings/mfd/max77xxx.txt
[1]: https://patchwork.kernel.org/patch/1855331/
Hello Mark,
On 06/16/2014 09:27 PM, Mark Brown wrote:
> On Mon, Jun 16, 2014 at 08:02:34PM +0200, Javier Martinez Canillas wrote:
>
>> +- max77802,pmic-buck-dvs-gpios: The DVS GPIOs. 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.
>
> I can't tell from reading this what the property means exactly - I
> expect it is an array of the GPIOs in some order but that order isn't
> specified.
>
Ok, I'll improve this property documentation.
>> +config MFD_MAX77802
>> + tristate "Maxim Integrated MAX77802 PMIC Support"
>> + depends on I2C=y
>> + select MFD_CORE
>> + select REGMAP_I2C
>> + select REGMAP_IRQ
>> + select IRQ_DOMAIN
>> + help
>> + Say yes here to support for Maxim Integrated MAX77802.
>> + This is a Power Management IC with 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.
>> +
>
> It is a bit unorthodox to put the build infrastructure in the same patch
> as the DT binding...
>
I thought it was the opposite. That a DT binding document has to be added along
with the first user of the binding but I'll separate the DT doc in another patch
then if that is the right thing to do.
Thanks a lot for all your suggestions, I'll wait a little to see if there is
more feedback and repost a v3 addressing all the issues you pointed out.
Best regards,
Javier
On Tue, Jun 17, 2014 at 12:49:56PM +0200, Javier Martinez Canillas wrote:
> On 06/16/2014 09:25 PM, Mark Brown wrote:
> >> + config.dev = &pdev->dev;
> > Are you sure this shouldn't be the MFD?
> I just looked at regulator_register() and saw that it does rdev->dev.parent =
> dev, so yes this has to be the MFD.
Do the regulators manage to get their supplies?
> So, for now I thought it made sense to set the operating mode to normal on
> probe() but I'll change it to read from the hardware if that is better.
Yes, otherwise if the device is configured otherwise then when we change
the configuration we may break something.
> I guess I should check in the datasheet if a sane default operating mode for
> LDOs is expected when the chip is reseted or if this is left undefined and also
> if the bootloader already set this.
You can't do anything based on the particular bootloader you're using in
your current system, this has to work in other systems.
Hello Mark,
On 06/17/2014 04:12 PM, Mark Brown wrote:
> On Tue, Jun 17, 2014 at 12:49:56PM +0200, Javier Martinez Canillas wrote:
>> On 06/16/2014 09:25 PM, Mark Brown wrote:
>
>> >> + config.dev = &pdev->dev;
>
>> > Are you sure this shouldn't be the MFD?
>
>> I just looked at regulator_register() and saw that it does rdev->dev.parent =
>> dev, so yes this has to be the MFD.
>
I noticed that many drivers set config.dev = &pdev->dev. The original Chrome OS
max77xxx driver and max77686 are two examples but others drivers do the same:
$ git grep "config.dev = &pdev->dev" drivers/regulator/ | wc -l
35
$ git grep "config.dev = pdev->dev.parent" drivers/regulator/ | wc -l
11
And also I see that mfd_add_device() calls
devm_regulator_bulk_register_supply_alias(&pdev->dev,...) so I'm confused now
about what the correct device should be...
> Do the regulators manage to get their supplies?
>
There are no current support in mainline for the devices that use the regulators
in this PMIC so I can't tell you if consumers manage to get their supplies
correctly (e.g: if regulator_dev_lookup succeeds).
But I see in the kernel log that the regulators are registered and configured as
expected [0] and also the driver in the Chrome OS 3.8 kernel is working for sure
and sets config.dev to &pdev->dev instead of the MFD.
>> So, for now I thought it made sense to set the operating mode to normal on
>> probe() but I'll change it to read from the hardware if that is better.
>
> Yes, otherwise if the device is configured otherwise then when we change
> the configuration we may break something.
>
>> I guess I should check in the datasheet if a sane default operating mode for
>> LDOs is expected when the chip is reseted or if this is left undefined and also
>> if the bootloader already set this.
>
> You can't do anything based on the particular bootloader you're using in
> your current system, this has to work in other systems.
>
Yes, that's why I thought it was a good idea to set to a default operational
mode but I'll change it to read from the hardware instead.
Thanks a lot and best regards,
Javier
[0]: http://pastebin.com/raw.php?i=8yyMXcGD
On Mon, 16 Jun 2014, Javier Martinez Canillas wrote:
> By using the generic IRQ support in the Register map API, it
> is possible to get rid of max77686-irq.c and simplify the code.
>
> Suggested-by: Krzysztof Kozlowski <[email protected]>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> ---
> drivers/mfd/Kconfig | 1 +
> drivers/mfd/Makefile | 2 +-
> drivers/mfd/max77686-irq.c | 319 -----------------------------------
> drivers/mfd/max77686.c | 93 +++++++++-
> drivers/rtc/rtc-max77686.c | 27 +--
> include/linux/mfd/max77686-private.h | 26 ++-
> include/linux/mfd/max77686.h | 2 -
> 7 files changed, 119 insertions(+), 351 deletions(-)
> delete mode 100644 drivers/mfd/max77686-irq.c
Nice patch - great diff.
I assume we have to wait for some of the other patches in the set, but
for now:
Acked-by: Lee Jones <[email protected]>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index ee8204c..0916447 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -371,6 +371,7 @@ 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 8afedba..3b3b408 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-$(CONFIG_MFD_MAX77693) += max77693.o max77693-irq.o
> obj-$(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..42eacb16 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;
> }
>
> 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..3a810b1 100644
> --- a/include/linux/mfd/max77686-private.h
> +++ b/include/linux/mfd/max77686-private.h
> @@ -205,7 +205,7 @@ 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,
> @@ -215,6 +215,25 @@ enum max77686_irq {
> 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 +243,10 @@ 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;
>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
> 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]>
> ---
>
> Changes since v1:
> - Remove unneeded check if num_regulators != MAX77802_MAX_REGULATORS.
> - Fix .set_suspend_mode handler comment and split regulators ops for
> regulators that behave differently. Suggested by Mark Brown.
> - Use module_platform_driver() instead of having init/exit functions.
> Suggested by Mark Brown.
> - Use the new descriptor-based GPIO interface instead of the deprecated
> integer based GPIO one. Suggested by Mark Brown.
> - Look for "regulators" child node instead of "voltage-regulators" to be
> consistent with other PMIC drivers. Suggested by Mark Brown.
>
> drivers/mfd/max77802.c | 1 +
Can you remove all of the MFD changes from patches 7, 8 and 9 and
create new one. That way there's no requirement for any cross
subsystem messiness.
> drivers/regulator/Kconfig | 9 +
> drivers/regulator/Makefile | 1 +
> drivers/regulator/max77802.c | 701 +++++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 712 insertions(+)
> create mode 100644 drivers/regulator/max77802.c
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
Javier,
On Mon, Jun 16, 2014 at 11:02 AM, Javier Martinez Canillas
<[email protected]> wrote:
> @@ -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);
I would imagine you either don't need these regmap_del_irq_chip() here
or that you _do_ need them in max77686_i2c_remove().
...from looking at other drivers I think the answer is to add them to
max77686_i2c_remove().
> diff --git a/include/linux/mfd/max77686-private.h b/include/linux/mfd/max77686-private.h
> index 8c75a9c..3a810b1 100644
> --- a/include/linux/mfd/max77686-private.h
> +++ b/include/linux/mfd/max77686-private.h
> @@ -205,7 +205,7 @@ 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,
> @@ -215,6 +215,25 @@ enum max77686_irq {
> MAX77686_IRQ_NR,
Maybe remove MAX77686_IRQ_NR which no longer makes any sense now that
you start over at 0 partway through.
Overall this looks good to me, so once nits above are fixed feel to
add my Reviewed-by. I've also built and booted this patch on
exynos5250-snow and tested that the RTC wakealarm fires and can even
wake the system up (with some additional work that I'll email you
about).
Reviewed-by: Doug Anderson <[email protected]>
Tested-by: Doug Anderson <[email protected]>
> >> +config MFD_MAX77802
> >> + tristate "Maxim Integrated MAX77802 PMIC Support"
> >> + depends on I2C=y
> >> + select MFD_CORE
> >> + select REGMAP_I2C
> >> + select REGMAP_IRQ
> >> + select IRQ_DOMAIN
> >> + help
> >> + Say yes here to support for Maxim Integrated MAX77802.
> >> + This is a Power Management IC with 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.
> >> +
> >
> > It is a bit unorthodox to put the build infrastructure in the same patch
> > as the DT binding...
> >
>
> I thought it was the opposite. That a DT binding document has to be added along
> with the first user of the binding but I'll separate the DT doc in another patch
> then if that is the right thing to do.
This was the 'old' method, but changed a little over a year ago.
> Thanks a lot for all your suggestions, I'll wait a little to see if there is
> more feedback and repost a v3 addressing all the issues you pointed out.
Just re-post it. I'll review the next version.
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
Hello Doug,
On 06/17/2014 10:57 PM, Doug Anderson wrote:
> Javier,
>
> On Mon, Jun 16, 2014 at 11:02 AM, Javier Martinez Canillas
> <[email protected]> wrote:
>> @@ -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);
>
> I would imagine you either don't need these regmap_del_irq_chip() here
> or that you _do_ need them in max77686_i2c_remove().
>
> ...from looking at other drivers I think the answer is to add them to
> max77686_i2c_remove().
>
>
Yes, I forgot to do the regmap irqchip cleanup in the driver .remove function.
The same issue is in the max77802 driver btw so I'll fix both on v3.
Thanks a lot for pointing this out.
>> diff --git a/include/linux/mfd/max77686-private.h b/include/linux/mfd/max77686-private.h
>> index 8c75a9c..3a810b1 100644
>> --- a/include/linux/mfd/max77686-private.h
>> +++ b/include/linux/mfd/max77686-private.h
>> @@ -205,7 +205,7 @@ 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,
>> @@ -215,6 +215,25 @@ enum max77686_irq {
>> MAX77686_IRQ_NR,
>
> Maybe remove MAX77686_IRQ_NR which no longer makes any sense now that
> you start over at 0 partway through.
>
>
Right, it is not needed anymore. I'll remove it when re-spin.
> Overall this looks good to me, so once nits above are fixed feel to
> add my Reviewed-by. I've also built and booted this patch on
> exynos5250-snow and tested that the RTC wakealarm fires and can even
> wake the system up (with some additional work that I'll email you
> about).
>
> Reviewed-by: Doug Anderson <[email protected]>
> Tested-by: Doug Anderson <[email protected]>
>
Great! thanks a lot for testing.
Best regards,
Javier
Hello Lee,
Thanks a lot for your feedback.
On 06/17/2014 11:17 PM, Lee Jones wrote:
>> 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]>
>> ---
>>
>> Changes since v1:
>> - Remove unneeded check if num_regulators != MAX77802_MAX_REGULATORS.
>> - Fix .set_suspend_mode handler comment and split regulators ops for
>> regulators that behave differently. Suggested by Mark Brown.
>> - Use module_platform_driver() instead of having init/exit functions.
>> Suggested by Mark Brown.
>> - Use the new descriptor-based GPIO interface instead of the deprecated
>> integer based GPIO one. Suggested by Mark Brown.
>> - Look for "regulators" child node instead of "voltage-regulators" to be
>> consistent with other PMIC drivers. Suggested by Mark Brown.
>>
>> drivers/mfd/max77802.c | 1 +
>
> Can you remove all of the MFD changes from patches 7, 8 and 9 and
> create new one. That way there's no requirement for any cross
> subsystem messiness.
>
Sure, Mark already suggested the same and I'll do it on the next version.
But there still be some cross-subsystem dependency/messiness since the
regulator, clk and rtc drivers include the mfd max77802 headers that are added
in Patch 6.
So I guess you should either a) take the whole patch-set through your mfd tree
or b) merge the mfd patches and create an immutable branch that can be pulled by
Mark, Mike and Alessandro.
I don't know what's the preferred workflow in these cases...
>> drivers/regulator/Kconfig | 9 +
>> drivers/regulator/Makefile | 1 +
>> drivers/regulator/max77802.c | 701 +++++++++++++++++++++++++++++++++++++++++++
>> 4 files changed, 712 insertions(+)
>> create mode 100644 drivers/regulator/max77802.c
>
Best regards,
Javier
Hello Lee,
On 06/18/2014 10:32 AM, Lee Jones wrote:
>> >> +config MFD_MAX77802
>> >> + tristate "Maxim Integrated MAX77802 PMIC Support"
>> >> + depends on I2C=y
>> >> + select MFD_CORE
>> >> + select REGMAP_I2C
>> >> + select REGMAP_IRQ
>> >> + select IRQ_DOMAIN
>> >> + help
>> >> + Say yes here to support for Maxim Integrated MAX77802.
>> >> + This is a Power Management IC with 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.
>> >> +
>> >
>> > It is a bit unorthodox to put the build infrastructure in the same patch
>> > as the DT binding...
>> >
>>
>> I thought it was the opposite. That a DT binding document has to be added along
>> with the first user of the binding but I'll separate the DT doc in another patch
>> then if that is the right thing to do.
>
> This was the 'old' method, but changed a little over a year ago.
>
>> Thanks a lot for all your suggestions, I'll wait a little to see if there is
>> more feedback and repost a v3 addressing all the issues you pointed out.
>
> Just re-post it. I'll review the next version.
>
Ok, will do. I was waiting for Krzysztof's feedback but he can review v3 as well.
Thanks a lot and best regards,
Javier
On Wed, 18 Jun 2014, Javier Martinez Canillas wrote:
> Hello Lee,
>
> Thanks a lot for your feedback.
>
> On 06/17/2014 11:17 PM, Lee Jones wrote:
> >> 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]>
> >> ---
> >>
> >> Changes since v1:
> >> - Remove unneeded check if num_regulators != MAX77802_MAX_REGULATORS.
> >> - Fix .set_suspend_mode handler comment and split regulators ops for
> >> regulators that behave differently. Suggested by Mark Brown.
> >> - Use module_platform_driver() instead of having init/exit functions.
> >> Suggested by Mark Brown.
> >> - Use the new descriptor-based GPIO interface instead of the deprecated
> >> integer based GPIO one. Suggested by Mark Brown.
> >> - Look for "regulators" child node instead of "voltage-regulators" to be
> >> consistent with other PMIC drivers. Suggested by Mark Brown.
> >>
> >> drivers/mfd/max77802.c | 1 +
> >
> > Can you remove all of the MFD changes from patches 7, 8 and 9 and
> > create new one. That way there's no requirement for any cross
> > subsystem messiness.
> >
>
> Sure, Mark already suggested the same and I'll do it on the next version.
>
> But there still be some cross-subsystem dependency/messiness since the
> regulator, clk and rtc drivers include the mfd max77802 headers that are added
> in Patch 6.
What I should have said was _avoidable_ or _unnecessary_ messiness.
> So I guess you should either a) take the whole patch-set through your mfd tree
> or b) merge the mfd patches and create an immutable branch that can be pulled by
> Mark, Mike and Alessandro.
>
> I don't know what's the preferred workflow in these cases...
That's fine. I'm happy to create shared branches when required.
> >> drivers/regulator/Kconfig | 9 +
> >> drivers/regulator/Makefile | 1 +
> >> drivers/regulator/max77802.c | 701 +++++++++++++++++++++++++++++++++++++++++++
> >> 4 files changed, 712 insertions(+)
> >> create mode 100644 drivers/regulator/max77802.c
> >
>
> Best regards,
> Javier
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On Wed, 18 Jun 2014 15:10:48 +0100
Lee Jones <[email protected]> wrote:
> > So I guess you should either a) take the whole patch-set through your mfd tree
> > or b) merge the mfd patches and create an immutable branch that can be pulled by
> > Mark, Mike and Alessandro.
> >
> > I don't know what's the preferred workflow in these cases...
>
> That's fine. I'm happy to create shared branches when required.
mfd tree will be ok.
--
Best regards,
Alessandro Zummo,
Tower Technologies - Torino, Italy
http://www.towertech.it
On Tue, Jun 17, 2014 at 06:05:29PM +0200, Javier Martinez Canillas wrote:
> On 06/17/2014 04:12 PM, Mark Brown wrote:
> >> I just looked at regulator_register() and saw that it does rdev->dev.parent =
> >> dev, so yes this has to be the MFD.
> I noticed that many drivers set config.dev = &pdev->dev. The original Chrome OS
> max77xxx driver and max77686 are two examples but others drivers do the same:
Not all drivers are DT drivers that bother specifying supplies.
> And also I see that mfd_add_device() calls
> devm_regulator_bulk_register_supply_alias(&pdev->dev,...) so I'm confused now
> about what the correct device should be...
Right, but to do that you need to set those aliases up - have you done
so?
> > Do the regulators manage to get their supplies?
> There are no current support in mainline for the devices that use the regulators
> in this PMIC so I can't tell you if consumers manage to get their supplies
> correctly (e.g: if regulator_dev_lookup succeeds).
That's not really relevant here - I'm asking if the regulators get their
own supplies rather than if anything uses them.
Hello Mark,
On 06/21/2014 10:40 PM, Mark Brown wrote:
> On Tue, Jun 17, 2014 at 06:05:29PM +0200, Javier Martinez Canillas wrote:
>> On 06/17/2014 04:12 PM, Mark Brown wrote:
>
>> >> I just looked at regulator_register() and saw that it does rdev->dev.parent =
>> >> dev, so yes this has to be the MFD.
>
>> I noticed that many drivers set config.dev = &pdev->dev. The original Chrome OS
>> max77xxx driver and max77686 are two examples but others drivers do the same:
>
> Not all drivers are DT drivers that bother specifying supplies.
>
>> And also I see that mfd_add_device() calls
>> devm_regulator_bulk_register_supply_alias(&pdev->dev,...) so I'm confused now
>> about what the correct device should be...
>
> Right, but to do that you need to set those aliases up - have you done
> so?
>
>> > Do the regulators manage to get their supplies?
>
>> There are no current support in mainline for the devices that use the regulators
>> in this PMIC so I can't tell you if consumers manage to get their supplies
>> correctly (e.g: if regulator_dev_lookup succeeds).
>
> That's not really relevant here - I'm asking if the regulators get their
> own supplies rather than if anything uses them.
>
Sorry if I keep misunderstanding your question but the regulators in this PMIC
don't have a parent supply/regulator node.
If by own supplies you mean the regulators power outputs (voltage/current
constraints), then yes, the regulators manage to get their own voltage output
correctly regardless of the value set in config.dev (&pdev->dev or
pdev->dev.parent).
I see in regulator_register() that config.dev is used to set the value of struct
regulator_dev .dev.parent and that is used in two places in regulator core:
1) In regulator_register() to get the regmap if config->regmap is not set.
2) In regulator_dev_lookup() checks if r->dev.parent is set.
For 1) config.regmap is explicitly set to the MFD regmap in max77802 driver so
config.dev is not used in this case and for 2) the value does not matter since
it only checks that it's not NULL.
Having said that, when I was preparing v3 of the patch-set I noticed that
regulator_register() does:
dev = config->dev;
...
rdev->dev.parent = dev;
So I changed to use MFD device instead of &pdev->dev in the version I posted
last week since the MFD device is the regulator parent.
Best regards,
Javier
On Mon, Jun 23, 2014 at 11:28:25AM +0200, Javier Martinez Canillas wrote:
> On 06/21/2014 10:40 PM, Mark Brown wrote:
> > That's not really relevant here - I'm asking if the regulators get their
> > own supplies rather than if anything uses them.
> Sorry if I keep misunderstanding your question but the regulators in this PMIC
> don't have a parent supply/regulator node.
They should, I'm pretty sure the device does actually regulate one
supply into another.
Hello Mark,
On 06/23/2014 11:47 AM, Mark Brown wrote:
> On Mon, Jun 23, 2014 at 11:28:25AM +0200, Javier Martinez Canillas wrote:
>> On 06/21/2014 10:40 PM, Mark Brown wrote:
>
>> > That's not really relevant here - I'm asking if the regulators get their
>> > own supplies rather than if anything uses them.
>
>> Sorry if I keep misunderstanding your question but the regulators in this PMIC
>> don't have a parent supply/regulator node.
>
> They should, I'm pretty sure the device does actually regulate one
> supply into another.
>
Thanks a lot for the clarification. This was not evident to me when I read the
PMIC datasheet and because both the max77xxx Chrome OS 3.8 and mainline max77686
drivers used a simplistic model of the power scheme.
But Doug confirmed to me that some regulators on this PMIC do indeed use others
regulators as a power supply so I'll change this in the next version of the
patch-set.
Best regards,
Javier