Add the regulator driver for PMIC 88pm800 including device tree
support.
88pm800 is an I2C-based power-management IC containing voltage
regulators, a real-time clock, and some general purpose ADC devices,
Signed-off-by: Yi Zhang <[email protected]>
Signed-off-by: Chao Xie <[email protected]>
---
.../devicetree/bindings/regulator/88pm800.txt | 38 ++
drivers/regulator/88pm800.c | 442 ++++++++++++++++++++
drivers/regulator/Kconfig | 10 +
drivers/regulator/Makefile | 1 +
4 files changed, 491 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/regulator/88pm800.txt
create mode 100644 drivers/regulator/88pm800.c
diff --git a/Documentation/devicetree/bindings/regulator/88pm800.txt b/Documentation/devicetree/bindings/regulator/88pm800.txt
new file mode 100644
index 0000000..e8a54c2
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/88pm800.txt
@@ -0,0 +1,38 @@
+Marvell 88PM800 regulator
+
+Required properties:
+- compatible: "marvell,88pm800"
+- reg: I2C slave address
+- regulators: A node that houses a sub-node for each regulator within the
+ device. Each sub-node is identified using the node's name (or the deprecated
+ regulator-compatible property if present), with valid values listed below.
+ The content of each sub-node is defined by the standard binding for
+ regulators; see regulator.txt.
+
+The valid names for regulators are:
+
+ buck1, buck2, buck3, buck4, buck5, ldo1, ldo2, ldo3, ldo4, ldo5, ldo6, ldo7,
+ ldo8, ldo9, ldo10, ldo11, ldo12, ldo13, ldo14, ldo15, ldo16, ldo17, ldo18, ldo19
+
+Example:
+
+ pmic: 88pm800@31 {
+ compatible = "marvell,88pm800";
+ reg = <0x31>;
+
+ regulators {
+ buck1 {
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <3950000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ ldo1 {
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <15000000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+...
+ };
+ };
diff --git a/drivers/regulator/88pm800.c b/drivers/regulator/88pm800.c
new file mode 100644
index 0000000..ed704ca
--- /dev/null
+++ b/drivers/regulator/88pm800.c
@@ -0,0 +1,442 @@
+/*
+ * Regulators driver for Marvell 88PM800
+ *
+ * Copyright (C) 2012 Marvell International Ltd.
+ * Joseph(Yossi) Hanin <[email protected]>
+ * Yi Zhang <[email protected]>
+ *
+ * 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.
+ */
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/88pm80x.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/regulator/of_regulator.h>
+
+/* LDO1 with DVC[0..3] */
+#define PM800_LDO1_VOUT (0x08) /* VOUT1 */
+#define PM800_LDO1_VOUT_2 (0x09)
+#define PM800_LDO1_VOUT_3 (0x0A)
+#define PM800_LDO2_VOUT (0x0B)
+#define PM800_LDO3_VOUT (0x0C)
+#define PM800_LDO4_VOUT (0x0D)
+#define PM800_LDO5_VOUT (0x0E)
+#define PM800_LDO6_VOUT (0x0F)
+#define PM800_LDO7_VOUT (0x10)
+#define PM800_LDO8_VOUT (0x11)
+#define PM800_LDO9_VOUT (0x12)
+#define PM800_LDO10_VOUT (0x13)
+#define PM800_LDO11_VOUT (0x14)
+#define PM800_LDO12_VOUT (0x15)
+#define PM800_LDO13_VOUT (0x16)
+#define PM800_LDO14_VOUT (0x17)
+#define PM800_LDO15_VOUT (0x18)
+#define PM800_LDO16_VOUT (0x19)
+#define PM800_LDO17_VOUT (0x1A)
+#define PM800_LDO18_VOUT (0x1B)
+#define PM800_LDO19_VOUT (0x1C)
+
+/* BUCK1 with DVC[0..3] */
+#define PM800_BUCK1 (0x3C)
+#define PM800_BUCK1_1 (0x3D)
+#define PM800_BUCK1_2 (0x3E)
+#define PM800_BUCK1_3 (0x3F)
+#define PM800_BUCK2 (0x40)
+#define PM800_BUCK3 (0x41)
+#define PM800_BUCK3 (0x41)
+#define PM800_BUCK4 (0x42)
+#define PM800_BUCK4_1 (0x43)
+#define PM800_BUCK4_2 (0x44)
+#define PM800_BUCK4_3 (0x45)
+#define PM800_BUCK5 (0x46)
+
+#define PM800_BUCK_ENA (0x50)
+#define PM800_LDO_ENA1_1 (0x51)
+#define PM800_LDO_ENA1_2 (0x52)
+#define PM800_LDO_ENA1_3 (0x53)
+
+#define PM800_LDO_ENA2_1 (0x56)
+#define PM800_LDO_ENA2_2 (0x57)
+#define PM800_LDO_ENA2_3 (0x58)
+
+#define PM800_BUCK1_MISC1 (0x78)
+#define PM800_BUCK3_MISC1 (0x7E)
+#define PM800_BUCK4_MISC1 (0x81)
+#define PM800_BUCK5_MISC1 (0x84)
+
+struct pm800_regulator_volt_range {
+ int min_uv;
+ int max_uv;
+ int step_uv;
+ /* the register value for min_uv */
+ int min_val;
+};
+
+struct pm800_regulator_info {
+ struct regulator_desc desc;
+ int max_ua;
+
+ struct pm800_regulator_volt_range *volt;
+ unsigned int ranges;
+};
+
+struct pm800_regulators {
+ struct regulator_dev *regulators[PM800_ID_RG_MAX];
+ struct pm80x_chip *chip;
+ struct regmap *map;
+};
+
+/*
+ * vreg - the buck regs string.
+ * ereg - the string for the enable register.
+ * ebit - the bit number in the enable register.
+ * amax - the current
+ * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
+ * not the constant voltage table.
+ */
+#define PM800_BUCK(vreg, ereg, ebit, amax, volt_ranges) \
+{ \
+ .desc = { \
+ .name = #vreg, \
+ .ops = &pm800_volt_range_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = PM800_ID_##vreg, \
+ .owner = THIS_MODULE, \
+ .vsel_reg = PM800_##vreg, \
+ .vsel_mask = 0x7f, \
+ .enable_reg = PM800_##ereg, \
+ .enable_mask = 1 << (ebit), \
+ }, \
+ .max_ua = (amax), \
+ .volt = (volt_ranges), \
+ .ranges = ARRAY_SIZE(volt_ranges), \
+}
+
+/*
+ * vreg - the LDO regs string
+ * ereg - the string for the enable register.
+ * ebit - the bit number in the enable register.
+ * amax - the current
+ * volt_table - the LDO voltage table
+ * For all the LDOes, there are too many ranges. Using volt_table will be
+ * simpler and faster.
+ */
+#define PM800_LDO(vreg, ereg, ebit, amax, ldo_volt_table) \
+{ \
+ .desc = { \
+ .name = #vreg, \
+ .ops = &pm800_volt_table_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = PM800_ID_##vreg, \
+ .owner = THIS_MODULE, \
+ .n_voltages = ARRAY_SIZE(ldo_volt_table), \
+ .vsel_reg = PM800_##vreg##_VOUT, \
+ .vsel_mask = 0x1f, \
+ .enable_reg = PM800_##ereg, \
+ .enable_mask = 1 << (ebit), \
+ .volt_table = ldo_volt_table, \
+ }, \
+ .max_ua = (amax), \
+}
+
+/* Ranges are sorted in ascending order. */
+static struct pm800_regulator_volt_range buck1_volt_range[] = {
+ {600000, 1587500, 12500, 0x0},
+ {1600000, 1800000, 50000, 0x50},
+};
+
+/* BUCK 2~5 have same ranges. */
+static struct pm800_regulator_volt_range buck2_5_volt_range[] = {
+ {600000, 1587500, 12500, 0x0},
+ {1600000, 3300000, 50000, 0x50},
+};
+
+static const unsigned int ldo1_volt_table[] = {
+ 600000, 650000, 700000, 750000, 800000, 850000, 900000, 950000,
+ 1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
+};
+
+static const unsigned int ldo2_volt_table[] = {
+ 1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
+};
+
+/* LDO 3~17 have same voltage table. */
+static const unsigned int ldo3_17_volt_table[] = {
+ 1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
+ 2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
+};
+
+/* LDO 18~19 have same voltage table. */
+static const unsigned int ldo18_19_volt_table[] = {
+ 1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
+};
+
+static int pm800_get_current_limit(struct regulator_dev *rdev)
+{
+ struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
+
+ return info->max_ua;
+}
+
+static int pm800_list_voltage(struct regulator_dev *rdev,
+ unsigned int selector)
+{
+ struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
+ struct pm800_regulator_volt_range *range;
+ int i, max_val, volt = -EINVAL;
+
+ if (info->volt == NULL)
+ return -EINVAL;
+
+ /* get the voltage via the register value */
+ for (i = 0; i < info->ranges; i++) {
+ range = &info->volt[i];
+ max_val = (range->max_uv - range->min_uv) / range->step_uv;
+
+ if (selector >= range->min_val && selector <= max_val) {
+ volt = (selector - range->min_val) * range->step_uv
+ + range->min_uv;
+ break;
+ }
+ }
+
+ return volt;
+}
+
+static int pm800_map_voltage(struct regulator_dev *rdev,
+ int min_uv, int max_uv)
+{
+ struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
+ struct pm800_regulator_volt_range *range;
+ int i, best_index = -1;
+
+ if (info->volt == NULL)
+ return -EINVAL;
+
+ /*
+ * Ranges are sorted in ascending order. So if we found a best_uv
+ * in this range, we can break out.
+ */
+ for (i = 0; i < info->ranges; i++) {
+ range = &info->volt[i];
+
+ if (min_uv <= range->max_uv && max_uv >= range->min_uv) {
+ if (min_uv <= range->min_uv)
+ best_index = 0;
+ else
+ best_index = (min_uv - range->min_uv +
+ range->step_uv - 1) / range->step_uv;
+ break;
+ }
+ }
+
+ if (best_index == -1)
+ return -EINVAL;
+
+ return best_index + range->min_val;
+}
+
+static struct regulator_ops pm800_volt_range_ops = {
+ .list_voltage = pm800_list_voltage,
+ .map_voltage = pm800_map_voltage,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .get_current_limit = pm800_get_current_limit,
+};
+
+static struct regulator_ops pm800_volt_table_ops = {
+ .list_voltage = regulator_list_voltage_table,
+ .map_voltage = regulator_map_voltage_iterate,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .get_current_limit = pm800_get_current_limit,
+};
+
+/* The array is indexed by id(PM800_ID_XXX) */
+static struct pm800_regulator_info pm800_regulator_info[] = {
+ PM800_BUCK(BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range),
+ PM800_BUCK(BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range),
+ PM800_BUCK(BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range),
+ PM800_BUCK(BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range),
+ PM800_BUCK(BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range),
+
+ PM800_LDO(LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
+ PM800_LDO(LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
+ PM800_LDO(LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
+ PM800_LDO(LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
+};
+
+#define PM800_REGULATOR_OF_MATCH(_name, _id) \
+ [PM800_ID_##_id] = { \
+ .name = #_name, \
+ .driver_data = &pm800_regulator_info[PM800_ID_##_id], \
+ }
+
+static struct of_regulator_match pm800_regulator_matches[] = {
+ PM800_REGULATOR_OF_MATCH(buck1, BUCK1),
+ PM800_REGULATOR_OF_MATCH(buck2, BUCK2),
+ PM800_REGULATOR_OF_MATCH(buck3, BUCK3),
+ PM800_REGULATOR_OF_MATCH(buck4, BUCK4),
+ PM800_REGULATOR_OF_MATCH(buck5, BUCK5),
+ PM800_REGULATOR_OF_MATCH(ldo1, LDO1),
+ PM800_REGULATOR_OF_MATCH(ldo2, LDO2),
+ PM800_REGULATOR_OF_MATCH(ldo3, LDO3),
+ PM800_REGULATOR_OF_MATCH(ldo4, LDO4),
+ PM800_REGULATOR_OF_MATCH(ldo5, LDO5),
+ PM800_REGULATOR_OF_MATCH(ldo6, LDO6),
+ PM800_REGULATOR_OF_MATCH(ldo7, LDO7),
+ PM800_REGULATOR_OF_MATCH(ldo8, LDO8),
+ PM800_REGULATOR_OF_MATCH(ldo9, LDO9),
+ PM800_REGULATOR_OF_MATCH(ldo10, LDO10),
+ PM800_REGULATOR_OF_MATCH(ldo11, LDO11),
+ PM800_REGULATOR_OF_MATCH(ldo12, LDO12),
+ PM800_REGULATOR_OF_MATCH(ldo13, LDO13),
+ PM800_REGULATOR_OF_MATCH(ldo14, LDO14),
+ PM800_REGULATOR_OF_MATCH(ldo15, LDO15),
+ PM800_REGULATOR_OF_MATCH(ldo16, LDO16),
+ PM800_REGULATOR_OF_MATCH(ldo17, LDO17),
+ PM800_REGULATOR_OF_MATCH(ldo18, LDO18),
+ PM800_REGULATOR_OF_MATCH(ldo19, LDO19),
+};
+
+static int pm800_regulator_dt_init(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ int ret;
+
+ ret = of_regulator_match(&pdev->dev, np,
+ pm800_regulator_matches,
+ ARRAY_SIZE(pm800_regulator_matches));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int pm800_regulator_probe(struct platform_device *pdev)
+{
+ struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+ struct pm80x_platform_data *pdata = pdev->dev.parent->platform_data;
+ struct pm800_regulators *pm800_data;
+ struct pm800_regulator_info *info;
+ struct regulator_config config = { };
+ struct regulator_init_data *init_data;
+ int i, ret;
+
+ if (!pdata || pdata->num_regulators == 0) {
+ if (IS_ENABLED(CONFIG_OF)) {
+ ret = pm800_regulator_dt_init(pdev);
+ if (ret)
+ return ret;
+ } else {
+ return -ENODEV;
+ }
+ } else if (pdata->num_regulators) {
+ /* Check whether num_regulator is valid. */
+ unsigned int count = 0;
+ for (i = 0; pdata->regulators[i]; i++)
+ count++;
+ if (count != pdata->num_regulators)
+ return -EINVAL;
+ } else {
+ return -EINVAL;
+ }
+
+ pm800_data = devm_kzalloc(&pdev->dev, sizeof(*pm800_data),
+ GFP_KERNEL);
+ if (!pm800_data) {
+ dev_err(&pdev->dev, "Failed to allocate pm800_regualtors");
+ return -ENOMEM;
+ }
+
+ pm800_data->map = chip->subchip->regmap_power;
+ pm800_data->chip = chip;
+
+ platform_set_drvdata(pdev, pm800_data);
+
+ for (i = 0; i < PM800_ID_RG_MAX; i++) {
+ if (!pdata || pdata->num_regulators == 0)
+ init_data = pm800_regulator_matches[i].init_data;
+ else
+ init_data = pdata->regulators[i];
+ if (!init_data)
+ continue;
+ info = pm800_regulator_matches[i].driver_data;
+ config.dev = &pdev->dev;
+ config.init_data = init_data;
+ config.driver_data = info;
+ config.regmap = pm800_data->map;
+
+ pm800_data->regulators[i] =
+ regulator_register(&info->desc, &config);
+ if (IS_ERR(pm800_data->regulators[i])) {
+ ret = PTR_ERR(pm800_data->regulators[i]);
+ dev_err(&pdev->dev, "Failed to register %s\n",
+ info->desc.name);
+
+ while (--i >= 0 && pm800_data->regulators[i])
+ regulator_unregister(pm800_data->regulators[i]);
+
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int pm800_regulator_remove(struct platform_device *pdev)
+{
+ struct pm800_regulators *pm800_data = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; pm800_data->regulators[i] && i < PM800_ID_RG_MAX; i++)
+ regulator_unregister(pm800_data->regulators[i]);
+
+ return 0;
+}
+
+static struct platform_driver pm800_regulator_driver = {
+ .driver = {
+ .name = "88pm80x-regulator",
+ .owner = THIS_MODULE,
+ },
+ .probe = pm800_regulator_probe,
+ .remove = pm800_regulator_remove,
+};
+
+module_platform_driver(pm800_regulator_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Joseph(Yossi) Hanin <[email protected]>");
+MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
+MODULE_ALIAS("platform:88pm800-regulator");
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index a5d97ea..e97dc56 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -164,6 +164,16 @@ config REGULATOR_ISL6271A
help
This driver supports ISL6271A voltage regulator chip.
+config REGULATOR_88PM800
+ bool "Marvell 88PM800 Power regulators"
+ depends on MFD_88PM800=y
+ help
+ This driver supports Marvell 88PM800 voltage regulator chips.
+ It delivers digitally programmable output,
+ the voltage is programmed via I2C interface.
+ It's suitable to support PXA988 chips to control VCC_MAIN and
+ various voltages.
+
config REGULATOR_88PM8607
bool "Marvell 88PM8607 Power regulators"
depends on MFD_88PM860X=y
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 6e82503..5fe48a1 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o
obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o
+obj-$(CONFIG_REGULATOR_88PM800) += 88pm800.o
obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o
obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o
obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o
--
1.7.4.1
On Thu, Jun 27, 2013 at 04:46:04AM -0400, Chao Xie wrote:
> Add the regulator driver for PMIC 88pm800 including device tree
> support.
> 88pm800 is an I2C-based power-management IC containing voltage
> regulators, a real-time clock, and some general purpose ADC devices,
Applied, thanks. Your table based list and map voltage functions
actually look very generic so should be added to the core but I'll do
that myself as a refactoring so this can go into v3.11.
On Fri, Jun 28, 2013 at 7:56 PM, Mark Brown <[email protected]> wrote:
> On Thu, Jun 27, 2013 at 04:46:04AM -0400, Chao Xie wrote:
>> Add the regulator driver for PMIC 88pm800 including device tree
>> support.
>> 88pm800 is an I2C-based power-management IC containing voltage
>> regulators, a real-time clock, and some general purpose ADC devices,
>
> Applied, thanks. Your table based list and map voltage functions
> actually look very generic so should be added to the core but I'll do
> that myself as a refactoring so this can go into v3.11.
Thanks.