diff options
Diffstat (limited to 'drivers/regulator/tps6286x-regulator.c')
| -rw-r--r-- | drivers/regulator/tps6286x-regulator.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/drivers/regulator/tps6286x-regulator.c b/drivers/regulator/tps6286x-regulator.c new file mode 100644 index 0000000000..758c702696 --- /dev/null +++ b/drivers/regulator/tps6286x-regulator.c @@ -0,0 +1,159 @@ +// 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.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 = "SW", + .owner = THIS_MODULE, + .ops = &tps6286x_regulator_ops, + .of_map_mode = tps6286x_of_map_mode, + .regulators_node = "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 = tps6286x_dt_ids, + }, + .probe = tps6286x_i2c_probe, + .id_table = tps6286x_i2c_id, +}; + +module_i2c_driver(tps6286x_regulator_driver); + +MODULE_LICENSE("GPL v2"); |