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Commit 38c09961 authored by Wenyou Yang's avatar Wenyou Yang Committed by Mark Brown
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regulator: act8945a: add regulator driver for ACT8945A 



This patch adds new regulator driver to support ACT8945A MFD
chip's regulators.

The ACT8945A has three step-down DC/DC converters and four
low-dropout regulators.

Signed-off-by: default avatarWenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 92e963f5

drivers/regulator/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -78,6 +78,15 @@ config REGULATOR_ACT8865 
	  This driver controls a active-semi act8865 voltage output

	  regulator via I2C bus.



config REGULATOR_ACT8945A

	tristate "Active-semi ACT8945A voltage regulator"

	depends on MFD_ACT8945A

	help

	  This driver controls a active-semi ACT8945A voltage regulator

	  via I2C bus. The ACT8945A features three step-down DC/DC converters

	  and four low-dropout linear regulators, along with a ActivePath

	  battery charger.



config REGULATOR_AD5398

	tristate "Analog Devices AD5398/AD5821 regulators"

	depends on I2C

drivers/regulator/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o 
obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o

obj-$(CONFIG_REGULATOR_AB8500)	+= ab8500-ext.o ab8500.o

obj-$(CONFIG_REGULATOR_ACT8865) += act8865-regulator.o

obj-$(CONFIG_REGULATOR_ACT8945A) += act8945a-regulator.o

obj-$(CONFIG_REGULATOR_AD5398) += ad5398.o

obj-$(CONFIG_REGULATOR_ANATOP) += anatop-regulator.o

obj-$(CONFIG_REGULATOR_ARIZONA) += arizona-micsupp.o arizona-ldo1.o

drivers/regulator/act8945a-regulator.c

0 → 100644
+165 −0
Original line number Diff line number Diff line 
/*

 * Voltage regulation driver for active-semi ACT8945A PMIC

 *

 * Copyright (C) 2015 Atmel Corporation

 *

 * Author: Wenyou Yang <wenyou.yang@atmel.com>

 *

 * 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/module.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>



/**

 * ACT8945A Global Register Map.

 */

#define ACT8945A_SYS_MODE	0x00

#define ACT8945A_SYS_CTRL	0x01

#define ACT8945A_DCDC1_VSET1	0x20

#define ACT8945A_DCDC1_VSET2	0x21

#define ACT8945A_DCDC1_CTRL	0x22

#define ACT8945A_DCDC2_VSET1	0x30

#define ACT8945A_DCDC2_VSET2	0x31

#define ACT8945A_DCDC2_CTRL	0x32

#define ACT8945A_DCDC3_VSET1	0x40

#define ACT8945A_DCDC3_VSET2	0x41

#define ACT8945A_DCDC3_CTRL	0x42

#define ACT8945A_LDO1_VSET	0x50

#define ACT8945A_LDO1_CTRL	0x51

#define ACT8945A_LDO2_VSET	0x54

#define ACT8945A_LDO2_CTRL	0x55

#define ACT8945A_LDO3_VSET	0x60

#define ACT8945A_LDO3_CTRL	0x61

#define ACT8945A_LDO4_VSET	0x64

#define ACT8945A_LDO4_CTRL	0x65



/**

 * Field Definitions.

 */

#define ACT8945A_ENA		0x80	/* ON - [7] */

#define ACT8945A_VSEL_MASK	0x3F	/* VSET - [5:0] */



/**

 * ACT8945A Voltage Number

 */

#define ACT8945A_VOLTAGE_NUM	64



enum {

	ACT8945A_ID_DCDC1,

	ACT8945A_ID_DCDC2,

	ACT8945A_ID_DCDC3,

	ACT8945A_ID_LDO1,

	ACT8945A_ID_LDO2,

	ACT8945A_ID_LDO3,

	ACT8945A_ID_LDO4,

	ACT8945A_REG_NUM,

};



static const struct regulator_linear_range act8945a_voltage_ranges[] = {

	REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),

	REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),

	REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),

};



static struct regulator_ops act8945a_ops = {

	.list_voltage		= regulator_list_voltage_linear_range,

	.map_voltage		= regulator_map_voltage_linear_range,

	.get_voltage_sel	= regulator_get_voltage_sel_regmap,

	.set_voltage_sel	= regulator_set_voltage_sel_regmap,

	.enable			= regulator_enable_regmap,

	.disable		= regulator_disable_regmap,

	.is_enabled		= regulator_is_enabled_regmap,

};



#define ACT89xx_REG(_name, _family, _id, _vsel_reg, _supply)		\

	[_family##_ID_##_id] = {					\

		.name			= _name,			\

		.supply_name		= _supply,			\

		.of_match		= of_match_ptr("REG_"#_id),	\

		.regulators_node	= of_match_ptr("regulators"),	\

		.id			= _family##_ID_##_id,		\

		.type			= REGULATOR_VOLTAGE,		\

		.ops			= &act8945a_ops,		\

		.n_voltages		= ACT8945A_VOLTAGE_NUM,		\

		.linear_ranges		= act8945a_voltage_ranges,	\

		.n_linear_ranges	= ARRAY_SIZE(act8945a_voltage_ranges), \

		.vsel_reg		= _family##_##_id##_##_vsel_reg, \

		.vsel_mask		= ACT8945A_VSEL_MASK,		\

		.enable_reg		= _family##_##_id##_CTRL,	\

		.enable_mask		= ACT8945A_ENA,			\

		.owner			= THIS_MODULE,			\

	}



static const struct regulator_desc act8945a_regulators[] = {

	ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET1, "vp1"),

	ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET1, "vp2"),

	ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET1, "vp3"),

	ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"),

	ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"),

	ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"),

	ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"),

};



static const struct regulator_desc act8945a_alt_regulators[] = {

	ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET2, "vp1"),

	ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET2, "vp2"),

	ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET2, "vp3"),

	ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"),

	ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"),

	ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"),

	ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"),

};



static int act8945a_pmic_probe(struct platform_device *pdev)

{

	struct regulator_config config = { };

	const struct regulator_desc *regulators;

	struct regulator_dev *rdev;

	int i, num_regulators;

	bool voltage_select;



	voltage_select = of_property_read_bool(pdev->dev.parent->of_node,

					       "active-semi,vsel-high");



	if (voltage_select) {

		regulators = act8945a_alt_regulators;

		num_regulators = ARRAY_SIZE(act8945a_alt_regulators);

	} else {

		regulators = act8945a_regulators;

		num_regulators = ARRAY_SIZE(act8945a_regulators);

	}



	config.dev = &pdev->dev;

	config.dev->of_node = pdev->dev.parent->of_node;

	for (i = 0; i < num_regulators; i++) {

		rdev = devm_regulator_register(&pdev->dev, &regulators[i], &config);

		if (IS_ERR(rdev)) {

			dev_err(&pdev->dev,

				"failed to register %s regulator\n",

				regulators[i].name);

			return PTR_ERR(rdev);

		}

	}



	return 0;

}



static struct platform_driver act8945a_pmic_driver = {

	.driver = {

		.name = "act8945a-regulator",

	},

	.probe = act8945a_pmic_probe,

};

module_platform_driver(act8945a_pmic_driver);



MODULE_DESCRIPTION("Active-semi ACT8945A voltage regulator driver");

MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");

MODULE_LICENSE("GPL");