// 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, const struct i2c_device_id *id) { 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", .of_match_table = of_match_ptr(tps6286x_dt_ids), }, .probe = tps6286x_i2c_probe, .id_table = tps6286x_i2c_id, }; module_i2c_driver(tps6286x_regulator_driver); MODULE_LICENSE("GPL v2");