161 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2// Copyright Axis Communications AB3 4#include <linux/err.h>5#include <linux/i2c.h>6#include <linux/module.h>7#include <linux/of.h>8#include <linux/regmap.h>9#include <linux/regulator/of_regulator.h>10#include <linux/regulator/machine.h>11#include <linux/regulator/driver.h>12 13#include <dt-bindings/regulator/ti,tps62864.h>14 15#define TPS6286X_VOUT1 0x0116#define TPS6286X_VOUT1_VO1_SET GENMASK(7, 0)17 18#define TPS6286X_CONTROL 0x0319#define TPS6286X_CONTROL_FPWM BIT(4)20#define TPS6286X_CONTROL_SWEN BIT(5)21 22#define TPS6286X_MIN_MV 40023#define TPS6286X_MAX_MV 167524#define TPS6286X_STEP_MV 525 26static const struct regmap_config tps6286x_regmap_config = {27 .reg_bits = 8,28 .val_bits = 8,29};30 31static int tps6286x_set_mode(struct regulator_dev *rdev, unsigned int mode)32{33 unsigned int val;34 35 switch (mode) {36 case REGULATOR_MODE_NORMAL:37 val = 0;38 break;39 case REGULATOR_MODE_FAST:40 val = TPS6286X_CONTROL_FPWM;41 break;42 default:43 return -EINVAL;44 }45 46 return regmap_update_bits(rdev->regmap, TPS6286X_CONTROL,47 TPS6286X_CONTROL_FPWM, val);48}49 50static unsigned int tps6286x_get_mode(struct regulator_dev *rdev)51{52 unsigned int val;53 int ret;54 55 ret = regmap_read(rdev->regmap, TPS6286X_CONTROL, &val);56 if (ret < 0)57 return 0;58 59 return (val & TPS6286X_CONTROL_FPWM) ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;60}61 62static const struct regulator_ops tps6286x_regulator_ops = {63 .enable = regulator_enable_regmap,64 .disable = regulator_disable_regmap,65 .set_mode = tps6286x_set_mode,66 .get_mode = tps6286x_get_mode,67 .is_enabled = regulator_is_enabled_regmap,68 .set_voltage_sel = regulator_set_voltage_sel_regmap,69 .get_voltage_sel = regulator_get_voltage_sel_regmap,70 .list_voltage = regulator_list_voltage_linear,71};72 73static unsigned int tps6286x_of_map_mode(unsigned int mode)74{75 switch (mode) {76 case TPS62864_MODE_NORMAL:77 return REGULATOR_MODE_NORMAL;78 case TPS62864_MODE_FPWM:79 return REGULATOR_MODE_FAST;80 default:81 return REGULATOR_MODE_INVALID;82 }83}84 85static const struct regulator_desc tps6286x_reg = {86 .name = "tps6286x",87 .of_match = "SW",88 .owner = THIS_MODULE,89 .ops = &tps6286x_regulator_ops,90 .of_map_mode = tps6286x_of_map_mode,91 .regulators_node = "regulators",92 .type = REGULATOR_VOLTAGE,93 .n_voltages = ((TPS6286X_MAX_MV - TPS6286X_MIN_MV) / TPS6286X_STEP_MV) + 1,94 .min_uV = TPS6286X_MIN_MV * 1000,95 .uV_step = TPS6286X_STEP_MV * 1000,96 .vsel_reg = TPS6286X_VOUT1,97 .vsel_mask = TPS6286X_VOUT1_VO1_SET,98 .enable_reg = TPS6286X_CONTROL,99 .enable_mask = TPS6286X_CONTROL_SWEN,100 .ramp_delay = 1000,101 /* tDelay + tRamp, rounded up */102 .enable_time = 3000,103};104 105static const struct of_device_id tps6286x_dt_ids[] = {106 { .compatible = "ti,tps62864", },107 { .compatible = "ti,tps62866", },108 { .compatible = "ti,tps62868", },109 { .compatible = "ti,tps62869", },110 { }111};112MODULE_DEVICE_TABLE(of, tps6286x_dt_ids);113 114static int tps6286x_i2c_probe(struct i2c_client *i2c)115{116 struct device *dev = &i2c->dev;117 struct regulator_config config = {};118 struct regulator_dev *rdev;119 struct regmap *regmap;120 121 regmap = devm_regmap_init_i2c(i2c, &tps6286x_regmap_config);122 if (IS_ERR(regmap))123 return PTR_ERR(regmap);124 125 config.dev = &i2c->dev;126 config.of_node = dev->of_node;127 config.regmap = regmap;128 129 rdev = devm_regulator_register(&i2c->dev, &tps6286x_reg, &config);130 if (IS_ERR(rdev)) {131 dev_err(&i2c->dev, "Failed to register tps6286x regulator\n");132 return PTR_ERR(rdev);133 }134 135 return 0;136}137 138static const struct i2c_device_id tps6286x_i2c_id[] = {139 { "tps62864" },140 { "tps62866" },141 { "tps62868" },142 { "tps62869" },143 {}144};145MODULE_DEVICE_TABLE(i2c, tps6286x_i2c_id);146 147static struct i2c_driver tps6286x_regulator_driver = {148 .driver = {149 .name = "tps6286x",150 .probe_type = PROBE_PREFER_ASYNCHRONOUS,151 .of_match_table = tps6286x_dt_ids,152 },153 .probe = tps6286x_i2c_probe,154 .id_table = tps6286x_i2c_id,155};156 157module_i2c_driver(tps6286x_regulator_driver);158 159MODULE_DESCRIPTION("TI TPS6286x Power Regulator driver");160MODULE_LICENSE("GPL v2");161