Unverified Commit a0c543bd authored by Gokhan Celik's avatar Gokhan Celik Committed by Mark Brown
Browse files

regulator: max77503: Add ADI MAX77503 support 



Add ADI MAX77503 buck converter driver support.

Signed-off-by: default avatarGokhan Celik <gokhan.celik@analog.com>
Link: https://lore.kernel.org/r/10bb3894fea31a098d768e346c8721e730d7cb21.1698000185.git.gokhan.celik@analog.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 8f7e17d8

drivers/regulator/Kconfig

+10 −0
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@@ -564,6 +564,16 @@ config REGULATOR_MAX5970 
	  The MAX5970/5978 is a smart switch with no output regulation, but

	  fault protection and voltage and current monitoring capabilities.



config REGULATOR_MAX77503

	tristate "Analog Devices MAX77503 Regulator"

	depends on I2C

	select REGMAP_I2C

	help

	  This driver controls a Analog Devices MAX77503 14V input, 1.5A

	  high-efficiency buck converter via I2C bus.

	  Say M here if you want to include support for the regulator as a

	  module.



config REGULATOR_MAX77541

	tristate "Analog Devices MAX77541/77540 Regulator"

	depends on MFD_MAX77541

drivers/regulator/Makefile

+1 −0
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@@ -69,6 +69,7 @@ obj-$(CONFIG_REGULATOR_LTC3676) += ltc3676.o 
obj-$(CONFIG_REGULATOR_MAX14577) += max14577-regulator.o

obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o

obj-$(CONFIG_REGULATOR_MAX5970) += max5970-regulator.o

obj-$(CONFIG_REGULATOR_MAX77503) += max77503-regulator.o

obj-$(CONFIG_REGULATOR_MAX77541) += max77541-regulator.o

obj-$(CONFIG_REGULATOR_MAX77620) += max77620-regulator.o

obj-$(CONFIG_REGULATOR_MAX77650) += max77650-regulator.o

drivers/regulator/max77503-regulator.c

0 → 100644
+137 −0
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// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * Copyright (c) 2023 Analog Devices, Inc.

 * ADI regulator driver for MAX77503.

 */



#include <linux/i2c.h>

#include <linux/module.h>

#include <linux/regmap.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/of_regulator.h>

#include <linux/util_macros.h>



#define MAX77503_REG_CFG			0x00

#define MAX77503_REG_VOUT			0x01



#define MAX77503_BIT_EN				BIT(0)

#define MAX77503_BIT_CURR_LIM		BIT(3)

#define MAX77503_BIT_ADEN			BIT(6)



#define MAX77503_BITS_SOFT_START	GENMASK(5, 4)

#define MAX77503_BITS_MX_VOUT		GENMASK(7, 0)



#define MAX77503_AD_ENABLED			0x1

#define MAX77503_AD_DISABLED		0x0



struct max77503_dev {

	struct device *dev;

	struct device_node *of_node;

	struct regulator_desc desc;

	struct regulator_dev *rdev;

	struct regmap *regmap;

};



static const struct regmap_config max77503_regmap_config = {

	.reg_bits = 8,

	.val_bits = 8,

	.max_register = 0x2,

};



static const struct regulator_ops max77503_buck_ops = {

	.list_voltage = regulator_list_voltage_linear_range,

	.map_voltage = regulator_map_voltage_ascend,

	.is_enabled = regulator_is_enabled_regmap,

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,

	.set_voltage_sel = regulator_set_voltage_sel_regmap,

	.get_current_limit = regulator_get_current_limit_regmap,

	.set_current_limit = regulator_set_current_limit_regmap,

	.set_active_discharge = regulator_set_active_discharge_regmap,

	.set_soft_start = regulator_set_soft_start_regmap,

};



static const struct linear_range max77503_buck_ranges[] = {

	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x54, 50000)

};



static const unsigned int max77503_current_limit_table[] = {

	500000, 2000000

};



static const struct regulator_desc max77503_regulators_desc = {

	.name = "max77503",

	.enable_reg = MAX77503_REG_CFG,

	.enable_mask = MAX77503_BIT_EN,

	.ops = &max77503_buck_ops,

	.type = REGULATOR_VOLTAGE,

	.linear_ranges = max77503_buck_ranges,

	.n_linear_ranges = ARRAY_SIZE(max77503_buck_ranges),

	.vsel_reg = MAX77503_REG_VOUT,

	.vsel_mask = MAX77503_BITS_MX_VOUT,

	.soft_start_reg = MAX77503_REG_CFG,

	.soft_start_mask = MAX77503_BITS_SOFT_START,

	.active_discharge_reg = MAX77503_REG_CFG,

	.active_discharge_mask = MAX77503_BIT_ADEN,

	.active_discharge_off = MAX77503_AD_DISABLED,

	.active_discharge_on = MAX77503_AD_ENABLED,

	.csel_reg = MAX77503_REG_CFG,

	.csel_mask = MAX77503_BIT_CURR_LIM,

	.curr_table = max77503_current_limit_table,

	.n_current_limits = ARRAY_SIZE(max77503_current_limit_table),

	.owner = THIS_MODULE,

};



static int max77503_regulator_probe(struct i2c_client *client)

{

	struct device *dev = &client->dev;

	struct regulator_config config = {};

	struct regulator_dev *rdev;



	config.dev = dev;

	config.of_node = dev->of_node;

	config.regmap = devm_regmap_init_i2c(client, &max77503_regmap_config);

	if (IS_ERR(config.regmap)) {

		dev_err(dev, "Failed to init regmap");

		return PTR_ERR(config.regmap);

	}



	rdev = devm_regulator_register(dev, &max77503_regulators_desc, &config);

	if (IS_ERR(rdev)) {

		dev_err(dev, "Failed to register regulator MAX77503");

		return PTR_ERR(rdev);

	}



	return 0;

}



static const struct of_device_id of_max77503_match_tbl[] = {

	{ .compatible = "adi,max77503", },

	{ }

};



MODULE_DEVICE_TABLE(of, of_max77503_match_tbl);



static const struct i2c_device_id max77503_regulator_id[] = {

	{"max77503"},

	{ }

};



MODULE_DEVICE_TABLE(i2c, max77503_regulator_id);



static struct i2c_driver max77503_regulator_driver = {

	.driver = {

		.name = "max77503",

		.of_match_table = of_max77503_match_tbl

	},

	.probe = max77503_regulator_probe,

	.id_table = max77503_regulator_id,

};



module_i2c_driver(max77503_regulator_driver);



MODULE_AUTHOR("Gokhan Celik <Gokhan.Celik@analog.com>");

MODULE_DESCRIPTION("MAX77503 regulator driver");

MODULE_LICENSE("GPL");