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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Regulator driver for the Richtek RT50334 *5 * Copyright (C) 2014 Samsung Electronics, Co., Ltd.6 * Author: Beomho Seo <beomho.seo@samsung.com>7 */8 9#include <linux/module.h>10#include <linux/platform_device.h>11#include <linux/regulator/driver.h>12#include <linux/mfd/rt5033.h>13#include <linux/mfd/rt5033-private.h>14#include <linux/regulator/of_regulator.h>15 16static const struct linear_range rt5033_buck_ranges[] = {17 REGULATOR_LINEAR_RANGE(1000000, 0, 20, 100000),18 REGULATOR_LINEAR_RANGE(3000000, 21, 31, 0),19};20 21static const struct linear_range rt5033_ldo_ranges[] = {22 REGULATOR_LINEAR_RANGE(1200000, 0, 18, 100000),23 REGULATOR_LINEAR_RANGE(3000000, 19, 31, 0),24};25 26static const struct regulator_ops rt5033_safe_ldo_ops = {27 .is_enabled = regulator_is_enabled_regmap,28 .enable = regulator_enable_regmap,29 .disable = regulator_disable_regmap,30 .list_voltage = regulator_list_voltage_linear,31};32 33static const struct regulator_ops rt5033_buck_ops = {34 .is_enabled = regulator_is_enabled_regmap,35 .enable = regulator_enable_regmap,36 .disable = regulator_disable_regmap,37 .list_voltage = regulator_list_voltage_linear_range,38 .get_voltage_sel = regulator_get_voltage_sel_regmap,39 .set_voltage_sel = regulator_set_voltage_sel_regmap,40};41 42static const struct regulator_desc rt5033_supported_regulators[] = {43 [RT5033_BUCK] = {44 .name = "BUCK",45 .of_match = of_match_ptr("BUCK"),46 .regulators_node = of_match_ptr("regulators"),47 .id = RT5033_BUCK,48 .ops = &rt5033_buck_ops,49 .type = REGULATOR_VOLTAGE,50 .owner = THIS_MODULE,51 .n_voltages = RT5033_REGULATOR_BUCK_VOLTAGE_STEP_NUM,52 .linear_ranges = rt5033_buck_ranges,53 .n_linear_ranges = ARRAY_SIZE(rt5033_buck_ranges),54 .enable_reg = RT5033_REG_CTRL,55 .enable_mask = RT5033_CTRL_EN_BUCK_MASK,56 .vsel_reg = RT5033_REG_BUCK_CTRL,57 .vsel_mask = RT5033_BUCK_CTRL_MASK,58 },59 [RT5033_LDO] = {60 .name = "LDO",61 .of_match = of_match_ptr("LDO"),62 .regulators_node = of_match_ptr("regulators"),63 .id = RT5033_LDO,64 .ops = &rt5033_buck_ops,65 .type = REGULATOR_VOLTAGE,66 .owner = THIS_MODULE,67 .n_voltages = RT5033_REGULATOR_LDO_VOLTAGE_STEP_NUM,68 .linear_ranges = rt5033_ldo_ranges,69 .n_linear_ranges = ARRAY_SIZE(rt5033_ldo_ranges),70 .enable_reg = RT5033_REG_CTRL,71 .enable_mask = RT5033_CTRL_EN_LDO_MASK,72 .vsel_reg = RT5033_REG_LDO_CTRL,73 .vsel_mask = RT5033_LDO_CTRL_MASK,74 },75 [RT5033_SAFE_LDO] = {76 .name = "SAFE_LDO",77 .of_match = of_match_ptr("SAFE_LDO"),78 .regulators_node = of_match_ptr("regulators"),79 .id = RT5033_SAFE_LDO,80 .ops = &rt5033_safe_ldo_ops,81 .type = REGULATOR_VOLTAGE,82 .owner = THIS_MODULE,83 .n_voltages = 1,84 .min_uV = RT5033_REGULATOR_SAFE_LDO_VOLTAGE,85 .enable_reg = RT5033_REG_CTRL,86 .enable_mask = RT5033_CTRL_EN_SAFE_LDO_MASK,87 },88};89 90static int rt5033_regulator_probe(struct platform_device *pdev)91{92 struct rt5033_dev *rt5033 = dev_get_drvdata(pdev->dev.parent);93 int ret, i;94 struct regulator_config config = {};95 96 config.dev = rt5033->dev;97 config.driver_data = rt5033;98 99 for (i = 0; i < ARRAY_SIZE(rt5033_supported_regulators); i++) {100 struct regulator_dev *regulator;101 102 config.regmap = rt5033->regmap;103 104 regulator = devm_regulator_register(&pdev->dev,105 &rt5033_supported_regulators[i], &config);106 if (IS_ERR(regulator)) {107 ret = PTR_ERR(regulator);108 dev_err(&pdev->dev,109 "Regulator init failed %d: with error: %d\n",110 i, ret);111 return ret;112 }113 }114 115 return 0;116}117 118static const struct platform_device_id rt5033_regulator_id[] = {119 { "rt5033-regulator", },120 { }121};122MODULE_DEVICE_TABLE(platform, rt5033_regulator_id);123 124static struct platform_driver rt5033_regulator_driver = {125 .driver = {126 .name = "rt5033-regulator",127 .probe_type = PROBE_PREFER_ASYNCHRONOUS,128 },129 .probe = rt5033_regulator_probe,130 .id_table = rt5033_regulator_id,131};132module_platform_driver(rt5033_regulator_driver);133 134MODULE_DESCRIPTION("Richtek RT5033 Regulator driver");135MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");136MODULE_LICENSE("GPL");137