Unverified Commit d83f778c authored by Sergey Larin's avatar Sergey Larin Committed by Mark Brown
Browse files

regulator: max8893: add regulator driver 



MAX8893 is a simple regulator which can be found on some of Sasmsung
phones.

Signed-off-by: default avatarSergey Larin <cerg2010cerg2010@mail.ru>
Link: https://lore.kernel.org/r/20210618141607.884-1-cerg2010cerg2010@mail.ru


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent ae60e6a9

drivers/regulator/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -578,6 +578,13 @@ config REGULATOR_MAX8660 
	  This driver controls a Maxim 8660/8661 voltage output

	  regulator via I2C bus.



config REGULATOR_MAX8893

	tristate "Maxim 8893 voltage regulator"

	depends on I2C

	help

	  This driver controls a Maxim 8893 voltage output

	  regulator via I2C bus.



config REGULATOR_MAX8907

	tristate "Maxim 8907 voltage regulator"

	depends on MFD_MAX8907 || COMPILE_TEST

drivers/regulator/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ obj-$(CONFIG_REGULATOR_MAX77620) += max77620-regulator.o 
obj-$(CONFIG_REGULATOR_MAX77650) += max77650-regulator.o

obj-$(CONFIG_REGULATOR_MAX8649)	+= max8649.o

obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o

obj-$(CONFIG_REGULATOR_MAX8893) += max8893.o

obj-$(CONFIG_REGULATOR_MAX8907) += max8907-regulator.o

obj-$(CONFIG_REGULATOR_MAX8925) += max8925-regulator.o

obj-$(CONFIG_REGULATOR_MAX8952) += max8952.o

drivers/regulator/max8893.c

0 → 100644
+183 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0+

#include <linux/module.h>

#include <linux/i2c.h>

#include <linux/of.h>

#include <linux/regmap.h>

#include <linux/regulator/driver.h>



static const struct regulator_ops max8893_ops = {

	.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,

	.list_voltage		= regulator_list_voltage_linear,

	.map_voltage		= regulator_map_voltage_linear,

};



static const struct regulator_desc max8893_regulators[] = {

	{

		.name = "BUCK",

		.supply_name = "in-buck",

		.of_match = of_match_ptr("buck"),

		.regulators_node = of_match_ptr("regulators"),

		.n_voltages = 0x11,

		.id = 6,

		.ops = &max8893_ops,

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

		.min_uV = 800000,

		.uV_step = 100000,

		.vsel_reg = 0x4,

		.vsel_mask = 0x1f,

		.enable_reg = 0x0,

		.enable_mask = BIT(7),

	},

	{

		.name = "LDO1",

		.supply_name = "in-ldo1",

		.of_match = of_match_ptr("ldo1"),

		.regulators_node = of_match_ptr("regulators"),

		.n_voltages = 0x12,

		.id = 1,

		.ops = &max8893_ops,

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

		.min_uV = 1600000,

		.uV_step = 100000,

		.vsel_reg = 0x5,

		.vsel_mask = 0x1f,

		.enable_reg = 0x0,

		.enable_mask = BIT(5),

	},

	{

		.name = "LDO2",

		.supply_name = "in-ldo2",

		.of_match = of_match_ptr("ldo2"),

		.regulators_node = of_match_ptr("regulators"),

		.n_voltages = 0x16,

		.id = 2,

		.ops = &max8893_ops,

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

		.min_uV = 1200000,

		.uV_step = 100000,

		.vsel_reg = 0x6,

		.vsel_mask = 0x1f,

		.enable_reg = 0x0,

		.enable_mask = BIT(4),

	},

	{

		.name = "LDO3",

		.supply_name = "in-ldo3",

		.of_match = of_match_ptr("ldo3"),

		.regulators_node = of_match_ptr("regulators"),

		.n_voltages = 0x12,

		.id = 3,

		.ops = &max8893_ops,

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

		.min_uV = 1600000,

		.uV_step = 100000,

		.vsel_reg = 0x7,

		.vsel_mask = 0x1f,

		.enable_reg = 0x0,

		.enable_mask = BIT(3),

	},

	{

		.name = "LDO4",

		.supply_name = "in-ldo4",

		.of_match = of_match_ptr("ldo4"),

		.regulators_node = of_match_ptr("regulators"),

		.n_voltages = 0x1a,

		.id = 4,

		.ops = &max8893_ops,

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

		.min_uV = 800000,

		.uV_step = 100000,

		.vsel_reg = 0x8,

		.vsel_mask = 0x1f,

		.enable_reg = 0x0,

		.enable_mask = BIT(2),

	},

	{

		.name = "LDO5",

		.supply_name = "in-ldo5",

		.of_match = of_match_ptr("ldo5"),

		.regulators_node = of_match_ptr("regulators"),

		.n_voltages = 0x1a,

		.id = 5,

		.ops = &max8893_ops,

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

		.min_uV = 800000,

		.uV_step = 100000,

		.vsel_reg = 0x9,

		.vsel_mask = 0x1f,

		.enable_reg = 0x0,

		.enable_mask = BIT(1),

	}

};



static const struct regmap_config max8893_regmap = {

	.reg_bits = 8,

	.val_bits = 8,

};



static int max8893_probe_new(struct i2c_client *i2c)

{

	int id, ret;

	struct regulator_config config = {.dev = &i2c->dev};

	struct regmap *regmap = devm_regmap_init_i2c(i2c, &max8893_regmap);



	if (IS_ERR(regmap)) {

		ret = PTR_ERR(regmap);

		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);

		return ret;

	}



	for (id = 0; id < ARRAY_SIZE(max8893_regulators); id++) {

		struct regulator_dev *rdev;

		rdev = devm_regulator_register(&i2c->dev,

					       &max8893_regulators[id],

					       &config);

		if (IS_ERR(rdev)) {

			ret = PTR_ERR(rdev);

			dev_err(&i2c->dev, "failed to register %s: %d\n",

				max8893_regulators[id].name, ret);

			return ret;

		}

	}



	return 0;

}



#ifdef CONFIG_OF

static const struct of_device_id max8893_dt_match[] = {

	{ .compatible = "maxim,max8893" },

	{ /* sentinel */ },

};

MODULE_DEVICE_TABLE(of, max8893_dt_match);

#endif



static const struct i2c_device_id max8893_ids[] = {

	{ "max8893", 0 },

	{ },

};

MODULE_DEVICE_TABLE(i2c, max8893_ids);



static struct i2c_driver max8893_driver = {

	.probe_new	= max8893_probe_new,

	.driver		= {

		.name	= "max8893",

		.of_match_table = of_match_ptr(max8893_dt_match),

	},

	.id_table	= max8893_ids,

};



module_i2c_driver(max8893_driver);



MODULE_DESCRIPTION("Maxim MAX8893 PMIC driver");

MODULE_AUTHOR("Sergey Larin <cerg2010cerg2010@mail.ru>");

MODULE_LICENSE("GPL");