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>

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index a69b546872c1b811e5f1a5f13846a0c2ae0cb3c1..7c39570b99b0911a6b496729ce0c49cec3c36916 100644 (file)
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -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

diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 028f2b8788db25d501e8e79cf8c963ab5f41b4f0..2f072544285ad3be3490ca275b86714cbce70e23 100644 (file)
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -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

diff --git a/drivers/regulator/max8893.c b/drivers/regulator/max8893.c
new file mode 100644 (file)
index 0000000..1519bf7
--- /dev/null
+++ b/drivers/regulator/max8893.c
@@ -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");