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Commit 95f1dc08 authored by Chao Xie's avatar Chao Xie Committed by Mark Brown
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regulator: 88pm800: add regulator driver for 88pm800 



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: default avatarYi Zhang <yizhang@marvell.com>
Signed-off-by: default avatarChao Xie <chao.xie@marvell.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent e54e6aa2

Documentation/devicetree/bindings/regulator/88pm800.txt

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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;

			};

...

		};

	};

drivers/regulator/88pm800.c

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/*

 * Regulators driver for Marvell 88PM800

 *

 * Copyright (C) 2012 Marvell International Ltd.

 * Joseph(Yossi) Hanin <yhanin@marvell.com>

 * Yi Zhang <yizhang@marvell.com>

 *

 * 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_info {

	struct regulator_desc desc;

	int max_ua;

};



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,					\

		.linear_ranges		= volt_ranges,			\

		.n_linear_ranges	= ARRAY_SIZE(volt_ranges),	\

		.vsel_reg		= PM800_##vreg,			\

		.vsel_mask		= 0x7f,				\

		.enable_reg		= PM800_##ereg,			\

		.enable_mask		= 1 << (ebit),			\

	},								\

	.max_ua		= (amax),					\

}



/*

 * 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 const struct regulator_linear_range buck1_volt_range[] = {

	{ .min_uV = 600000, .max_uV = 1587500, .min_sel = 0, .max_sel = 0x4f,

	  .uV_step = 12500 },

	{ .min_uV = 1600000, .max_uV = 1800000, .min_sel = 0x50,

	  .max_sel = 0x54, .uV_step = 50000 },

};



/* BUCK 2~5 have same ranges. */

static const struct regulator_linear_range buck2_5_volt_range[] = {

	{ .min_uV = 600000, .max_uV = 1587500,	.min_sel = 0, .max_sel = 0x4f,

	  .uV_step = 12500 },

	{ .min_uV = 1600000, .max_uV = 3300000, .min_sel = 0x50,

	  .max_sel = 0x72, .uV_step = 50000 },

};



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 struct regulator_ops pm800_volt_range_ops = {

	.list_voltage = regulator_list_voltage_linear_range,

	.map_voltage = regulator_map_voltage_linear_range,

	.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)

				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; 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 <yhanin@marvell.com>");

MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");

MODULE_ALIAS("platform:88pm800-regulator");

drivers/regulator/Kconfig

+10 −0
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@@ -64,6 +64,16 @@ config REGULATOR_USERSPACE_CONSUMER 




	  If unsure, say no.

	  If unsure, say no.





config REGULATOR_88PM800

	tristate "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

config REGULATOR_88PM8607

	bool "Marvell 88PM8607 Power regulators"

	bool "Marvell 88PM8607 Power regulators"

	depends on MFD_88PM860X=y

	depends on MFD_88PM860X=y

drivers/regulator/Makefile

+1 −0
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@@ -9,6 +9,7 @@ obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o 
obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o

obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o

obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o

obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o





obj-$(CONFIG_REGULATOR_88PM800) += 88pm800.o

obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o

obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o

obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o

obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o

obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o

obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o