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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * isl9305 - Intersil ISL9305 DCDC regulator4 *5 * Copyright 2014 Linaro Ltd6 *7 * Author: Mark Brown <broonie@kernel.org>8 */9 10#include <linux/module.h>11#include <linux/err.h>12#include <linux/i2c.h>13#include <linux/of.h>14#include <linux/platform_data/isl9305.h>15#include <linux/regmap.h>16#include <linux/regulator/driver.h>17#include <linux/regulator/of_regulator.h>18#include <linux/slab.h>19 20/*21 * Registers22 */23#define ISL9305_DCD1OUT 0x024#define ISL9305_DCD2OUT 0x125#define ISL9305_LDO1OUT 0x226#define ISL9305_LDO2OUT 0x327#define ISL9305_DCD_PARAMETER 0x428#define ISL9305_SYSTEM_PARAMETER 0x529#define ISL9305_DCD_SRCTL 0x630 31#define ISL9305_MAX_REG ISL9305_DCD_SRCTL32 33/*34 * DCD_PARAMETER35 */36#define ISL9305_DCD_PHASE 0x4037#define ISL9305_DCD2_ULTRA 0x2038#define ISL9305_DCD1_ULTRA 0x1039#define ISL9305_DCD2_BLD 0x0840#define ISL9305_DCD1_BLD 0x0441#define ISL9305_DCD2_MODE 0x0242#define ISL9305_DCD1_MODE 0x0143 44/*45 * SYSTEM_PARAMETER46 */47#define ISL9305_I2C_EN 0x4048#define ISL9305_DCDPOR_MASK 0x3049#define ISL9305_LDO2_EN 0x0850#define ISL9305_LDO1_EN 0x0451#define ISL9305_DCD2_EN 0x0252#define ISL9305_DCD1_EN 0x0153 54/*55 * DCD_SRCTL56 */57#define ISL9305_DCD2SR_MASK 0xc058#define ISL9305_DCD1SR_MASK 0x0759 60static const struct regulator_ops isl9305_ops = {61 .enable = regulator_enable_regmap,62 .disable = regulator_disable_regmap,63 .is_enabled = regulator_is_enabled_regmap,64 .list_voltage = regulator_list_voltage_linear,65 .get_voltage_sel = regulator_get_voltage_sel_regmap,66 .set_voltage_sel = regulator_set_voltage_sel_regmap,67};68 69static const struct regulator_desc isl9305_regulators[] = {70 [ISL9305_DCD1] = {71 .name = "DCD1",72 .of_match = of_match_ptr("dcd1"),73 .regulators_node = of_match_ptr("regulators"),74 .n_voltages = 0x70,75 .min_uV = 825000,76 .uV_step = 25000,77 .vsel_reg = ISL9305_DCD1OUT,78 .vsel_mask = 0x7f,79 .enable_reg = ISL9305_SYSTEM_PARAMETER,80 .enable_mask = ISL9305_DCD1_EN,81 .supply_name = "VINDCD1",82 .ops = &isl9305_ops,83 .owner = THIS_MODULE,84 },85 [ISL9305_DCD2] = {86 .name = "DCD2",87 .of_match = of_match_ptr("dcd2"),88 .regulators_node = of_match_ptr("regulators"),89 .n_voltages = 0x70,90 .min_uV = 825000,91 .uV_step = 25000,92 .vsel_reg = ISL9305_DCD2OUT,93 .vsel_mask = 0x7f,94 .enable_reg = ISL9305_SYSTEM_PARAMETER,95 .enable_mask = ISL9305_DCD2_EN,96 .supply_name = "VINDCD2",97 .ops = &isl9305_ops,98 .owner = THIS_MODULE,99 },100 [ISL9305_LDO1] = {101 .name = "LDO1",102 .of_match = of_match_ptr("ldo1"),103 .regulators_node = of_match_ptr("regulators"),104 .n_voltages = 0x37,105 .min_uV = 900000,106 .uV_step = 50000,107 .vsel_reg = ISL9305_LDO1OUT,108 .vsel_mask = 0x3f,109 .enable_reg = ISL9305_SYSTEM_PARAMETER,110 .enable_mask = ISL9305_LDO1_EN,111 .supply_name = "VINLDO1",112 .ops = &isl9305_ops,113 .owner = THIS_MODULE,114 },115 [ISL9305_LDO2] = {116 .name = "LDO2",117 .of_match = of_match_ptr("ldo2"),118 .regulators_node = of_match_ptr("regulators"),119 .n_voltages = 0x37,120 .min_uV = 900000,121 .uV_step = 50000,122 .vsel_reg = ISL9305_LDO2OUT,123 .vsel_mask = 0x3f,124 .enable_reg = ISL9305_SYSTEM_PARAMETER,125 .enable_mask = ISL9305_LDO2_EN,126 .supply_name = "VINLDO2",127 .ops = &isl9305_ops,128 .owner = THIS_MODULE,129 },130};131 132static const struct regmap_config isl9305_regmap = {133 .reg_bits = 8,134 .val_bits = 8,135 136 .max_register = ISL9305_MAX_REG,137 .cache_type = REGCACHE_MAPLE,138};139 140static int isl9305_i2c_probe(struct i2c_client *i2c)141{142 struct regulator_config config = { };143 struct isl9305_pdata *pdata = i2c->dev.platform_data;144 struct regulator_dev *rdev;145 struct regmap *regmap;146 int i, ret;147 148 regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap);149 if (IS_ERR(regmap)) {150 ret = PTR_ERR(regmap);151 dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);152 return ret;153 }154 155 config.dev = &i2c->dev;156 157 for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) {158 if (pdata)159 config.init_data = pdata->init_data[i];160 else161 config.init_data = NULL;162 163 rdev = devm_regulator_register(&i2c->dev,164 &isl9305_regulators[i],165 &config);166 if (IS_ERR(rdev)) {167 ret = PTR_ERR(rdev);168 dev_err(&i2c->dev, "Failed to register %s: %d\n",169 isl9305_regulators[i].name, ret);170 return ret;171 }172 }173 174 return 0;175}176 177#ifdef CONFIG_OF178static const struct of_device_id isl9305_dt_ids[] = {179 { .compatible = "isl,isl9305" }, /* for backward compat., don't use */180 { .compatible = "isil,isl9305" },181 { .compatible = "isl,isl9305h" }, /* for backward compat., don't use */182 { .compatible = "isil,isl9305h" },183 {},184};185MODULE_DEVICE_TABLE(of, isl9305_dt_ids);186#endif187 188static const struct i2c_device_id isl9305_i2c_id[] = {189 { "isl9305", },190 { "isl9305h", },191 { }192};193MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id);194 195static struct i2c_driver isl9305_regulator_driver = {196 .driver = {197 .name = "isl9305",198 .probe_type = PROBE_PREFER_ASYNCHRONOUS,199 .of_match_table = of_match_ptr(isl9305_dt_ids),200 },201 .probe = isl9305_i2c_probe,202 .id_table = isl9305_i2c_id,203};204 205module_i2c_driver(isl9305_regulator_driver);206 207MODULE_AUTHOR("Mark Brown");208MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator");209MODULE_LICENSE("GPL");210