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1// SPDX-License-Identifier: GPL-2.0+2#include <linux/module.h>3#include <linux/i2c.h>4#include <linux/regmap.h>5#include <linux/regulator/driver.h>6 7enum fan53880_regulator_ids {8 FAN53880_LDO1,9 FAN53880_LDO2,10 FAN53880_LDO3,11 FAN53880_LDO4,12 FAN53880_BUCK,13 FAN53880_BOOST,14};15 16enum fan53880_registers {17 FAN53880_PRODUCT_ID = 0x00,18 FAN53880_SILICON_REV,19 FAN53880_BUCKVOUT,20 FAN53880_BOOSTVOUT,21 FAN53880_LDO1VOUT,22 FAN53880_LDO2VOUT,23 FAN53880_LDO3VOUT,24 FAN53880_LDO4VOUT,25 FAN53880_IOUT,26 FAN53880_ENABLE,27 FAN53880_ENABLE_BOOST,28};29 30#define FAN53880_ID 0x0131 32static const struct regulator_ops fan53880_ops = {33 .list_voltage = regulator_list_voltage_linear_range,34 .map_voltage = regulator_map_voltage_linear_range,35 .set_voltage_sel = regulator_set_voltage_sel_regmap,36 .get_voltage_sel = regulator_get_voltage_sel_regmap,37 .enable = regulator_enable_regmap,38 .disable = regulator_disable_regmap,39 .is_enabled = regulator_is_enabled_regmap,40};41 42#define FAN53880_LDO(_num, _supply, _default) \43 [FAN53880_LDO ## _num] = { \44 .name = "LDO"#_num, \45 .of_match = "LDO"#_num, \46 .regulators_node = "regulators", \47 .type = REGULATOR_VOLTAGE, \48 .owner = THIS_MODULE, \49 .linear_ranges = (struct linear_range[]) { \50 REGULATOR_LINEAR_RANGE(_default, 0x0, 0x0, 0), \51 REGULATOR_LINEAR_RANGE(800000, 0xf, 0x73, 25000), \52 }, \53 .n_linear_ranges = 2, \54 .n_voltages = 0x74, \55 .vsel_reg = FAN53880_LDO ## _num ## VOUT, \56 .vsel_mask = 0x7f, \57 .enable_reg = FAN53880_ENABLE, \58 .enable_mask = BIT(_num - 1), \59 .enable_time = 150, \60 .supply_name = _supply, \61 .ops = &fan53880_ops, \62 }63 64static const struct regulator_desc fan53880_regulators[] = {65 FAN53880_LDO(1, "VIN12", 2800000),66 FAN53880_LDO(2, "VIN12", 2800000),67 FAN53880_LDO(3, "VIN3", 1800000),68 FAN53880_LDO(4, "VIN4", 1800000),69 [FAN53880_BUCK] = {70 .name = "BUCK",71 .of_match = "BUCK",72 .regulators_node = "regulators",73 .type = REGULATOR_VOLTAGE,74 .owner = THIS_MODULE,75 .linear_ranges = (struct linear_range[]) {76 REGULATOR_LINEAR_RANGE(1100000, 0x0, 0x0, 0),77 REGULATOR_LINEAR_RANGE(600000, 0x1f, 0xf7, 12500),78 },79 .n_linear_ranges = 2,80 .n_voltages = 0xf8,81 .vsel_reg = FAN53880_BUCKVOUT,82 .vsel_mask = 0xff,83 .enable_reg = FAN53880_ENABLE,84 .enable_mask = 0x10,85 .enable_time = 480,86 .supply_name = "PVIN",87 .ops = &fan53880_ops,88 },89 [FAN53880_BOOST] = {90 .name = "BOOST",91 .of_match = "BOOST",92 .regulators_node = "regulators",93 .type = REGULATOR_VOLTAGE,94 .owner = THIS_MODULE,95 .linear_ranges = (struct linear_range[]) {96 REGULATOR_LINEAR_RANGE(5000000, 0x0, 0x0, 0),97 REGULATOR_LINEAR_RANGE(3000000, 0x4, 0x70, 25000),98 },99 .n_linear_ranges = 2,100 .n_voltages = 0x71,101 .vsel_reg = FAN53880_BOOSTVOUT,102 .vsel_mask = 0x7f,103 .enable_reg = FAN53880_ENABLE_BOOST,104 .enable_mask = 0xff,105 .enable_time = 580,106 .supply_name = "PVIN",107 .ops = &fan53880_ops,108 },109};110 111static const struct regmap_config fan53880_regmap = {112 .reg_bits = 8,113 .val_bits = 8,114 .max_register = FAN53880_ENABLE_BOOST,115};116 117static int fan53880_i2c_probe(struct i2c_client *i2c)118{119 struct regulator_config config = { };120 struct regulator_dev *rdev;121 struct regmap *regmap;122 int i, ret;123 unsigned int data;124 125 regmap = devm_regmap_init_i2c(i2c, &fan53880_regmap);126 if (IS_ERR(regmap)) {127 ret = PTR_ERR(regmap);128 dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);129 return ret;130 }131 132 ret = regmap_read(regmap, FAN53880_PRODUCT_ID, &data);133 if (ret < 0) {134 dev_err(&i2c->dev, "Failed to read PRODUCT_ID: %d\n", ret);135 return ret;136 }137 if (data != FAN53880_ID) {138 dev_err(&i2c->dev, "Unsupported device id: 0x%x.\n", data);139 return -ENODEV;140 }141 142 config.dev = &i2c->dev;143 config.init_data = NULL;144 145 for (i = 0; i < ARRAY_SIZE(fan53880_regulators); i++) {146 rdev = devm_regulator_register(&i2c->dev,147 &fan53880_regulators[i],148 &config);149 if (IS_ERR(rdev)) {150 ret = PTR_ERR(rdev);151 dev_err(&i2c->dev, "Failed to register %s: %d\n",152 fan53880_regulators[i].name, ret);153 return ret;154 }155 }156 157 return 0;158}159 160static const struct of_device_id fan53880_dt_ids[] = {161 { .compatible = "onnn,fan53880", },162 {}163};164MODULE_DEVICE_TABLE(of, fan53880_dt_ids);165 166static const struct i2c_device_id fan53880_i2c_id[] = {167 { "fan53880", },168 {}169};170MODULE_DEVICE_TABLE(i2c, fan53880_i2c_id);171 172static struct i2c_driver fan53880_regulator_driver = {173 .driver = {174 .name = "fan53880",175 .probe_type = PROBE_PREFER_ASYNCHRONOUS,176 .of_match_table = fan53880_dt_ids,177 },178 .probe = fan53880_i2c_probe,179 .id_table = fan53880_i2c_id,180};181module_i2c_driver(fan53880_regulator_driver);182 183MODULE_DESCRIPTION("FAN53880 PMIC voltage regulator driver");184MODULE_AUTHOR("Christoph Fritz <chf.fritz@googlemail.com>");185MODULE_LICENSE("GPL");186