| // SPDX-License-Identifier: GPL-2.0-only |
| // Copyright Axis Communications AB |
| |
| #include <linux/err.h> |
| #include <linux/i2c.h> |
| #include <linux/module.h> |
| #include <linux/of_device.h> |
| #include <linux/regmap.h> |
| #include <linux/regulator/of_regulator.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/regulator/driver.h> |
| |
| #include <dt-bindings/regulator/ti,tps62864.h> |
| |
| #define TPS6286X_VOUT1 0x01 |
| #define TPS6286X_VOUT1_VO1_SET GENMASK(7, 0) |
| |
| #define TPS6286X_CONTROL 0x03 |
| #define TPS6286X_CONTROL_FPWM BIT(4) |
| #define TPS6286X_CONTROL_SWEN BIT(5) |
| |
| #define TPS6286X_MIN_MV 400 |
| #define TPS6286X_MAX_MV 1675 |
| #define TPS6286X_STEP_MV 5 |
| |
| static const struct regmap_config tps6286x_regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| }; |
| |
| static int tps6286x_set_mode(struct regulator_dev *rdev, unsigned int mode) |
| { |
| unsigned int val; |
| |
| switch (mode) { |
| case REGULATOR_MODE_NORMAL: |
| val = 0; |
| break; |
| case REGULATOR_MODE_FAST: |
| val = TPS6286X_CONTROL_FPWM; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return regmap_update_bits(rdev->regmap, TPS6286X_CONTROL, |
| TPS6286X_CONTROL_FPWM, val); |
| } |
| |
| static unsigned int tps6286x_get_mode(struct regulator_dev *rdev) |
| { |
| unsigned int val; |
| int ret; |
| |
| ret = regmap_read(rdev->regmap, TPS6286X_CONTROL, &val); |
| if (ret < 0) |
| return 0; |
| |
| return (val & TPS6286X_CONTROL_FPWM) ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL; |
| } |
| |
| static const struct regulator_ops tps6286x_regulator_ops = { |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .set_mode = tps6286x_set_mode, |
| .get_mode = tps6286x_get_mode, |
| .is_enabled = regulator_is_enabled_regmap, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .list_voltage = regulator_list_voltage_linear, |
| }; |
| |
| static unsigned int tps6286x_of_map_mode(unsigned int mode) |
| { |
| switch (mode) { |
| case TPS62864_MODE_NORMAL: |
| return REGULATOR_MODE_NORMAL; |
| case TPS62864_MODE_FPWM: |
| return REGULATOR_MODE_FAST; |
| default: |
| return REGULATOR_MODE_INVALID; |
| } |
| } |
| |
| static const struct regulator_desc tps6286x_reg = { |
| .name = "tps6286x", |
| .of_match = of_match_ptr("SW"), |
| .owner = THIS_MODULE, |
| .ops = &tps6286x_regulator_ops, |
| .of_map_mode = tps6286x_of_map_mode, |
| .regulators_node = of_match_ptr("regulators"), |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = ((TPS6286X_MAX_MV - TPS6286X_MIN_MV) / TPS6286X_STEP_MV) + 1, |
| .min_uV = TPS6286X_MIN_MV * 1000, |
| .uV_step = TPS6286X_STEP_MV * 1000, |
| .vsel_reg = TPS6286X_VOUT1, |
| .vsel_mask = TPS6286X_VOUT1_VO1_SET, |
| .enable_reg = TPS6286X_CONTROL, |
| .enable_mask = TPS6286X_CONTROL_SWEN, |
| .ramp_delay = 1000, |
| /* tDelay + tRamp, rounded up */ |
| .enable_time = 3000, |
| }; |
| |
| static const struct of_device_id tps6286x_dt_ids[] = { |
| { .compatible = "ti,tps62864", }, |
| { .compatible = "ti,tps62866", }, |
| { .compatible = "ti,tps62868", }, |
| { .compatible = "ti,tps62869", }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, tps6286x_dt_ids); |
| |
| static int tps6286x_i2c_probe(struct i2c_client *i2c) |
| { |
| struct device *dev = &i2c->dev; |
| struct regulator_config config = {}; |
| struct regulator_dev *rdev; |
| struct regmap *regmap; |
| |
| regmap = devm_regmap_init_i2c(i2c, &tps6286x_regmap_config); |
| if (IS_ERR(regmap)) |
| return PTR_ERR(regmap); |
| |
| config.dev = &i2c->dev; |
| config.of_node = dev->of_node; |
| config.regmap = regmap; |
| |
| rdev = devm_regulator_register(&i2c->dev, &tps6286x_reg, &config); |
| if (IS_ERR(rdev)) { |
| dev_err(&i2c->dev, "Failed to register tps6286x regulator\n"); |
| return PTR_ERR(rdev); |
| } |
| |
| return 0; |
| } |
| |
| static const struct i2c_device_id tps6286x_i2c_id[] = { |
| { "tps62864", 0 }, |
| { "tps62866", 0 }, |
| { "tps62868", 0 }, |
| { "tps62869", 0 }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(i2c, tps6286x_i2c_id); |
| |
| static struct i2c_driver tps6286x_regulator_driver = { |
| .driver = { |
| .name = "tps6286x", |
| .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
| .of_match_table = of_match_ptr(tps6286x_dt_ids), |
| }, |
| .probe_new = tps6286x_i2c_probe, |
| .id_table = tps6286x_i2c_id, |
| }; |
| |
| module_i2c_driver(tps6286x_regulator_driver); |
| |
| MODULE_LICENSE("GPL v2"); |