[PATCH 1/2] regulator: max8893: add regulator driver
From: Sergey Larin
Date: Fri Jun 18 2021 - 10:16:27 EST
MAX8893 is a simple regulator which can be found on some of Sasmsung
phones.
Signed-off-by: Sergey Larin <cerg2010cerg2010@xxxxxxx>
---
drivers/regulator/Kconfig | 7 ++
drivers/regulator/Makefile | 1 +
drivers/regulator/max8893.c | 183 ++++++++++++++++++++++++++++++++++++
3 files changed, 191 insertions(+)
create mode 100644 drivers/regulator/max8893.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index e2d43a8b3045..20d7e3a220d6 100644
--- 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 59ce3359a84a..6cce511cac26 100644
--- 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
index 000000000000..1519bf760da7
--- /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@xxxxxxx>");
+MODULE_LICENSE("GPL");
--
2.32.0