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regulator: max8893: add regulator driver 

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

Signed-off-by: Sergey Larin <cerg2010cerg2010@mail.ru>
Link: https://lore.kernel.org/r/20210618141607.884-1-cerg2010cerg2010@mail.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sergey Larin 2021-06-18 17:16:06 +03:00 committed by Mark Brown
parent ae60e6a9d2
commit d83f778c62
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GPG Key ID: 24D68B725D5487D0
3 changed files with 191 additions and 0 deletions
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7
drivers/regulator/Kconfig
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@ -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

1
drivers/regulator/Makefile
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@ -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

183
drivers/regulator/max8893.c Normal file
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@ -0,0 +1,183 @@
// 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");