diff options
Diffstat (limited to 'drivers/regulator/mp5416.c')
| -rw-r--r-- | drivers/regulator/mp5416.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/drivers/regulator/mp5416.c b/drivers/regulator/mp5416.c new file mode 100644 index 000000000000..67ce1b52a1a1 --- /dev/null +++ b/drivers/regulator/mp5416.c @@ -0,0 +1,245 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// mp5416.c - regulator driver for mps mp5416 +// +// Copyright 2020 Monolithic Power Systems, Inc +// +// Author: Saravanan Sekar <sravanhome@gmail.com> + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> +#include <linux/i2c.h> + +#define MP5416_REG_CTL0 0x00 +#define MP5416_REG_CTL1 0x01 +#define MP5416_REG_CTL2 0x02 +#define MP5416_REG_ILIM 0x03 +#define MP5416_REG_BUCK1 0x04 +#define MP5416_REG_BUCK2 0x05 +#define MP5416_REG_BUCK3 0x06 +#define MP5416_REG_BUCK4 0x07 +#define MP5416_REG_LDO1 0x08 +#define MP5416_REG_LDO2 0x09 +#define MP5416_REG_LDO3 0x0a +#define MP5416_REG_LDO4 0x0b + +#define MP5416_REGULATOR_EN BIT(7) +#define MP5416_MASK_VSET 0x7f +#define MP5416_MASK_BUCK1_ILIM 0xc0 +#define MP5416_MASK_BUCK2_ILIM 0x0c +#define MP5416_MASK_BUCK3_ILIM 0x30 +#define MP5416_MASK_BUCK4_ILIM 0x03 +#define MP5416_MASK_DVS_SLEWRATE 0xc0 + +/* values in uV */ +#define MP5416_VOLT1_MIN 600000 +#define MP5416_VOLT1_MAX 2187500 +#define MP5416_VOLT1_STEP 12500 +#define MP5416_VOLT2_MIN 800000 +#define MP5416_VOLT2_MAX 3975000 +#define MP5416_VOLT2_STEP 25000 + +#define MP5416_VOLT1_RANGE \ + ((MP5416_VOLT1_MAX - MP5416_VOLT1_MIN)/MP5416_VOLT1_STEP + 1) +#define MP5416_VOLT2_RANGE \ + ((MP5416_VOLT2_MAX - MP5416_VOLT2_MIN)/MP5416_VOLT2_STEP + 1) + +#define MP5416BUCK(_name, _id, _ilim, _dreg, _dval, _vsel) \ + [MP5416_BUCK ## _id] = { \ + .id = MP5416_BUCK ## _id, \ + .name = _name, \ + .of_match = _name, \ + .regulators_node = "regulators", \ + .ops = &mp5416_buck_ops, \ + .min_uV = MP5416_VOLT ##_vsel## _MIN, \ + .uV_step = MP5416_VOLT ##_vsel## _STEP, \ + .n_voltages = MP5416_VOLT ##_vsel## _RANGE, \ + .curr_table = _ilim, \ + .n_current_limits = ARRAY_SIZE(_ilim), \ + .csel_reg = MP5416_REG_ILIM, \ + .csel_mask = MP5416_MASK_BUCK ## _id ##_ILIM, \ + .vsel_reg = MP5416_REG_BUCK ## _id, \ + .vsel_mask = MP5416_MASK_VSET, \ + .enable_reg = MP5416_REG_BUCK ## _id, \ + .enable_mask = MP5416_REGULATOR_EN, \ + .active_discharge_on = _dval, \ + .active_discharge_reg = _dreg, \ + .active_discharge_mask = _dval, \ + .owner = THIS_MODULE, \ + } + +#define MP5416LDO(_name, _id, _dval) \ + [MP5416_LDO ## _id] = { \ + .id = MP5416_LDO ## _id, \ + .name = _name, \ + .of_match = _name, \ + .regulators_node = "regulators", \ + .ops = &mp5416_ldo_ops, \ + .min_uV = MP5416_VOLT2_MIN, \ + .uV_step = MP5416_VOLT2_STEP, \ + .n_voltages = MP5416_VOLT2_RANGE, \ + .vsel_reg = MP5416_REG_LDO ##_id, \ + .vsel_mask = MP5416_MASK_VSET, \ + .enable_reg = MP5416_REG_LDO ##_id, \ + .enable_mask = MP5416_REGULATOR_EN, \ + .active_discharge_on = _dval, \ + .active_discharge_reg = MP5416_REG_CTL2, \ + .active_discharge_mask = _dval, \ + .owner = THIS_MODULE, \ + } + +enum mp5416_regulators { + MP5416_BUCK1, + MP5416_BUCK2, + MP5416_BUCK3, + MP5416_BUCK4, + MP5416_LDO1, + MP5416_LDO2, + MP5416_LDO3, + MP5416_LDO4, + MP5416_MAX_REGULATORS, +}; + +static const struct regmap_config mp5416_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0x0d, +}; + +/* Current limits array (in uA) + * ILIM1 & ILIM3 + */ +static const unsigned int mp5416_I_limits1[] = { + 3800000, 4600000, 5600000, 6800000 +}; + +/* ILIM2 & ILIM4 */ +static const unsigned int mp5416_I_limits2[] = { + 2200000, 3200000, 4200000, 5200000 +}; + +static int mp5416_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay); + +static const struct regulator_ops mp5416_ldo_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_active_discharge = regulator_set_active_discharge_regmap, +}; + +static const struct regulator_ops mp5416_buck_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_active_discharge = regulator_set_active_discharge_regmap, + .get_current_limit = regulator_get_current_limit_regmap, + .set_current_limit = regulator_set_current_limit_regmap, + .set_ramp_delay = mp5416_set_ramp_delay, +}; + +static struct regulator_desc mp5416_regulators_desc[MP5416_MAX_REGULATORS] = { + MP5416BUCK("buck1", 1, mp5416_I_limits1, MP5416_REG_CTL1, BIT(0), 1), + MP5416BUCK("buck2", 2, mp5416_I_limits2, MP5416_REG_CTL1, BIT(1), 2), + MP5416BUCK("buck3", 3, mp5416_I_limits1, MP5416_REG_CTL1, BIT(2), 1), + MP5416BUCK("buck4", 4, mp5416_I_limits2, MP5416_REG_CTL2, BIT(5), 2), + MP5416LDO("ldo1", 1, BIT(4)), + MP5416LDO("ldo2", 2, BIT(3)), + MP5416LDO("ldo3", 3, BIT(2)), + MP5416LDO("ldo4", 4, BIT(1)), +}; + +/* + * DVS ramp rate BUCK1 to BUCK4 + * 00: 32mV/us + * 01: 16mV/us + * 10: 8mV/us + * 11: 4mV/us + */ +static int mp5416_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) +{ + unsigned int ramp_val; + + if (ramp_delay > 32000 || ramp_delay < 0) + return -EINVAL; + + if (ramp_delay <= 4000) + ramp_val = 3; + else if (ramp_delay <= 8000) + ramp_val = 2; + else if (ramp_delay <= 16000) + ramp_val = 1; + else + ramp_val = 0; + + return regmap_update_bits(rdev->regmap, MP5416_REG_CTL2, + MP5416_MASK_DVS_SLEWRATE, ramp_val << 6); +} + +static int mp5416_i2c_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct regulator_config config = { NULL, }; + struct regulator_dev *rdev; + struct regmap *regmap; + int i; + + regmap = devm_regmap_init_i2c(client, &mp5416_regmap_config); + if (IS_ERR(regmap)) { + dev_err(dev, "Failed to allocate regmap!\n"); + return PTR_ERR(regmap); + } + + config.dev = dev; + config.regmap = regmap; + + for (i = 0; i < MP5416_MAX_REGULATORS; i++) { + rdev = devm_regulator_register(dev, + &mp5416_regulators_desc[i], + &config); + if (IS_ERR(rdev)) { + dev_err(dev, "Failed to register regulator!\n"); + return PTR_ERR(rdev); + } + } + + return 0; +} + +static const struct of_device_id mp5416_of_match[] = { + { .compatible = "mps,mp5416" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mp5416_of_match); + +static const struct i2c_device_id mp5416_id[] = { + { "mp5416", }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, mp5416_id); + +static struct i2c_driver mp5416_regulator_driver = { + .driver = { + .name = "mp5416", + .of_match_table = of_match_ptr(mp5416_of_match), + }, + .probe_new = mp5416_i2c_probe, + .id_table = mp5416_id, +}; +module_i2c_driver(mp5416_regulator_driver); + +MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>"); +MODULE_DESCRIPTION("MP5416 PMIC regulator driver"); +MODULE_LICENSE("GPL"); |