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1// SPDX-License-Identifier: GPL-2.0+2//3// mp5416.c - regulator driver for mps mp54164//5// Copyright 2020 Monolithic Power Systems, Inc6//7// Author: Saravanan Sekar <sravanhome@gmail.com>8 9#include <linux/err.h>10#include <linux/i2c.h>11#include <linux/init.h>12#include <linux/module.h>13#include <linux/of.h>14#include <linux/platform_device.h>15#include <linux/regmap.h>16#include <linux/regulator/driver.h>17 18#define MP5416_REG_CTL0 0x0019#define MP5416_REG_CTL1 0x0120#define MP5416_REG_CTL2 0x0221#define MP5416_REG_ILIM 0x0322#define MP5416_REG_BUCK1 0x0423#define MP5416_REG_BUCK2 0x0524#define MP5416_REG_BUCK3 0x0625#define MP5416_REG_BUCK4 0x0726#define MP5416_REG_LDO1 0x0827#define MP5416_REG_LDO2 0x0928#define MP5416_REG_LDO3 0x0a29#define MP5416_REG_LDO4 0x0b30 31#define MP5416_REGULATOR_EN BIT(7)32#define MP5416_MASK_VSET 0x7f33#define MP5416_MASK_BUCK1_ILIM 0xc034#define MP5416_MASK_BUCK2_ILIM 0x0c35#define MP5416_MASK_BUCK3_ILIM 0x3036#define MP5416_MASK_BUCK4_ILIM 0x0337#define MP5416_MASK_DVS_SLEWRATE 0xc038 39/* values in uV */40#define MP5416_VOLT1_MIN 60000041#define MP5416_VOLT1_MAX 218750042#define MP5416_VOLT1_STEP 1250043#define MP5416_VOLT2_MIN 80000044#define MP5416_VOLT2_MAX 397500045#define MP5416_VOLT2_STEP 2500046 47#define MP5416_VOLT1_RANGE \48 ((MP5416_VOLT1_MAX - MP5416_VOLT1_MIN)/MP5416_VOLT1_STEP + 1)49#define MP5416_VOLT2_RANGE \50 ((MP5416_VOLT2_MAX - MP5416_VOLT2_MIN)/MP5416_VOLT2_STEP + 1)51 52#define MP5416BUCK(_name, _id, _ilim, _dreg, _dval, _vsel) \53 [MP5416_BUCK ## _id] = { \54 .id = MP5416_BUCK ## _id, \55 .name = _name, \56 .of_match = _name, \57 .regulators_node = "regulators", \58 .ops = &mp5416_buck_ops, \59 .min_uV = MP5416_VOLT ##_vsel## _MIN, \60 .uV_step = MP5416_VOLT ##_vsel## _STEP, \61 .n_voltages = MP5416_VOLT ##_vsel## _RANGE, \62 .curr_table = _ilim, \63 .n_current_limits = ARRAY_SIZE(_ilim), \64 .csel_reg = MP5416_REG_ILIM, \65 .csel_mask = MP5416_MASK_BUCK ## _id ##_ILIM, \66 .vsel_reg = MP5416_REG_BUCK ## _id, \67 .vsel_mask = MP5416_MASK_VSET, \68 .enable_reg = MP5416_REG_BUCK ## _id, \69 .enable_mask = MP5416_REGULATOR_EN, \70 .ramp_reg = MP5416_REG_CTL2, \71 .ramp_mask = MP5416_MASK_DVS_SLEWRATE, \72 .ramp_delay_table = mp5416_buck_ramp_table, \73 .n_ramp_values = ARRAY_SIZE(mp5416_buck_ramp_table), \74 .active_discharge_on = _dval, \75 .active_discharge_reg = _dreg, \76 .active_discharge_mask = _dval, \77 .owner = THIS_MODULE, \78 }79 80#define MP5416LDO(_name, _id, _dval) \81 [MP5416_LDO ## _id] = { \82 .id = MP5416_LDO ## _id, \83 .name = _name, \84 .of_match = _name, \85 .regulators_node = "regulators", \86 .ops = &mp5416_ldo_ops, \87 .min_uV = MP5416_VOLT2_MIN, \88 .uV_step = MP5416_VOLT2_STEP, \89 .n_voltages = MP5416_VOLT2_RANGE, \90 .vsel_reg = MP5416_REG_LDO ##_id, \91 .vsel_mask = MP5416_MASK_VSET, \92 .enable_reg = MP5416_REG_LDO ##_id, \93 .enable_mask = MP5416_REGULATOR_EN, \94 .active_discharge_on = _dval, \95 .active_discharge_reg = MP5416_REG_CTL2, \96 .active_discharge_mask = _dval, \97 .owner = THIS_MODULE, \98 }99 100enum mp5416_regulators {101 MP5416_BUCK1,102 MP5416_BUCK2,103 MP5416_BUCK3,104 MP5416_BUCK4,105 MP5416_LDO1,106 MP5416_LDO2,107 MP5416_LDO3,108 MP5416_LDO4,109 MP5416_MAX_REGULATORS,110};111 112static const struct regmap_config mp5416_regmap_config = {113 .reg_bits = 8,114 .val_bits = 8,115 .max_register = 0x0d,116};117 118/* Current limits array (in uA)119 * ILIM1 & ILIM3120 */121static const unsigned int mp5416_I_limits1[] = {122 3800000, 4600000, 5600000, 6800000123};124 125/* ILIM2 & ILIM4 */126static const unsigned int mp5416_I_limits2[] = {127 2200000, 3200000, 4200000, 5200000128};129 130/*131 * DVS ramp rate BUCK1 to BUCK4132 * 00: 32mV/us133 * 01: 16mV/us134 * 10: 8mV/us135 * 11: 4mV/us136 */137static const unsigned int mp5416_buck_ramp_table[] = {138 32000, 16000, 8000, 4000139};140 141static const struct regulator_ops mp5416_ldo_ops = {142 .enable = regulator_enable_regmap,143 .disable = regulator_disable_regmap,144 .is_enabled = regulator_is_enabled_regmap,145 .list_voltage = regulator_list_voltage_linear,146 .map_voltage = regulator_map_voltage_linear,147 .get_voltage_sel = regulator_get_voltage_sel_regmap,148 .set_voltage_sel = regulator_set_voltage_sel_regmap,149 .set_active_discharge = regulator_set_active_discharge_regmap,150};151 152static const struct regulator_ops mp5416_buck_ops = {153 .enable = regulator_enable_regmap,154 .disable = regulator_disable_regmap,155 .is_enabled = regulator_is_enabled_regmap,156 .list_voltage = regulator_list_voltage_linear,157 .map_voltage = regulator_map_voltage_linear,158 .get_voltage_sel = regulator_get_voltage_sel_regmap,159 .set_voltage_sel = regulator_set_voltage_sel_regmap,160 .set_active_discharge = regulator_set_active_discharge_regmap,161 .get_current_limit = regulator_get_current_limit_regmap,162 .set_current_limit = regulator_set_current_limit_regmap,163 .set_ramp_delay = regulator_set_ramp_delay_regmap,164};165 166static const struct regulator_desc mp5416_regulators_desc[MP5416_MAX_REGULATORS] = {167 MP5416BUCK("buck1", 1, mp5416_I_limits1, MP5416_REG_CTL1, BIT(0), 1),168 MP5416BUCK("buck2", 2, mp5416_I_limits2, MP5416_REG_CTL1, BIT(1), 2),169 MP5416BUCK("buck3", 3, mp5416_I_limits1, MP5416_REG_CTL1, BIT(2), 1),170 MP5416BUCK("buck4", 4, mp5416_I_limits2, MP5416_REG_CTL2, BIT(5), 2),171 MP5416LDO("ldo1", 1, BIT(4)),172 MP5416LDO("ldo2", 2, BIT(3)),173 MP5416LDO("ldo3", 3, BIT(2)),174 MP5416LDO("ldo4", 4, BIT(1)),175};176 177static const struct regulator_desc mp5496_regulators_desc[MP5416_MAX_REGULATORS] = {178 MP5416BUCK("buck1", 1, mp5416_I_limits1, MP5416_REG_CTL1, BIT(0), 1),179 MP5416BUCK("buck2", 2, mp5416_I_limits2, MP5416_REG_CTL1, BIT(1), 1),180 MP5416BUCK("buck3", 3, mp5416_I_limits1, MP5416_REG_CTL1, BIT(2), 1),181 MP5416BUCK("buck4", 4, mp5416_I_limits2, MP5416_REG_CTL2, BIT(5), 1),182 MP5416LDO("ldo1", 1, BIT(4)),183 MP5416LDO("ldo2", 2, BIT(3)),184 MP5416LDO("ldo3", 3, BIT(2)),185 MP5416LDO("ldo4", 4, BIT(1)),186};187 188static int mp5416_i2c_probe(struct i2c_client *client)189{190 struct device *dev = &client->dev;191 struct regulator_config config = { NULL, };192 static const struct regulator_desc *desc;193 struct regulator_dev *rdev;194 struct regmap *regmap;195 int i;196 197 regmap = devm_regmap_init_i2c(client, &mp5416_regmap_config);198 if (IS_ERR(regmap)) {199 dev_err(dev, "Failed to allocate regmap!\n");200 return PTR_ERR(regmap);201 }202 203 desc = i2c_get_match_data(client);204 if (!desc)205 return -ENODEV;206 207 config.dev = dev;208 config.regmap = regmap;209 210 for (i = 0; i < MP5416_MAX_REGULATORS; i++) {211 rdev = devm_regulator_register(dev,212 &desc[i],213 &config);214 if (IS_ERR(rdev)) {215 dev_err(dev, "Failed to register regulator!\n");216 return PTR_ERR(rdev);217 }218 }219 220 return 0;221}222 223static const struct of_device_id mp5416_of_match[] = {224 { .compatible = "mps,mp5416", .data = &mp5416_regulators_desc },225 { .compatible = "mps,mp5496", .data = &mp5496_regulators_desc },226 {}227};228MODULE_DEVICE_TABLE(of, mp5416_of_match);229 230static const struct i2c_device_id mp5416_id[] = {231 { "mp5416", (kernel_ulong_t)&mp5416_regulators_desc },232 { "mp5496", (kernel_ulong_t)&mp5496_regulators_desc },233 {}234};235MODULE_DEVICE_TABLE(i2c, mp5416_id);236 237static struct i2c_driver mp5416_regulator_driver = {238 .driver = {239 .name = "mp5416",240 .probe_type = PROBE_PREFER_ASYNCHRONOUS,241 .of_match_table = of_match_ptr(mp5416_of_match),242 },243 .probe = mp5416_i2c_probe,244 .id_table = mp5416_id,245};246module_i2c_driver(mp5416_regulator_driver);247 248MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");249MODULE_DESCRIPTION("MP5416 PMIC regulator driver");250MODULE_LICENSE("GPL");251