diff options
Diffstat (limited to 'drivers/regulator/max77503-regulator.c')
| -rw-r--r-- | drivers/regulator/max77503-regulator.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/regulator/max77503-regulator.c b/drivers/regulator/max77503-regulator.c new file mode 100644 index 0000000000..4a6ba4dd2a --- /dev/null +++ b/drivers/regulator/max77503-regulator.c @@ -0,0 +1,137 @@ +// 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"); |