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1// SPDX-License-Identifier: GPL-2.02//3// Device driver for regulators in Hi6421V530 IC4//5// Copyright (c) <2017> HiSilicon Technologies Co., Ltd.6// http://www.hisilicon.com7// Copyright (c) <2017> Linaro Ltd.8// https://www.linaro.org9//10// Author: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>11// Guodong Xu <guodong.xu@linaro.org>12 13#include <linux/mfd/hi6421-pmic.h>14#include <linux/module.h>15#include <linux/of.h>16#include <linux/platform_device.h>17#include <linux/regmap.h>18#include <linux/regulator/driver.h>19 20/*21 * struct hi6421v530_regulator_info - hi6421v530 regulator information22 * @desc: regulator description23 * @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep24 */25struct hi6421v530_regulator_info {26 struct regulator_desc rdesc;27 u8 mode_mask;28};29 30/* HI6421v530 regulators */31enum hi6421v530_regulator_id {32 HI6421V530_LDO3,33 HI6421V530_LDO9,34 HI6421V530_LDO11,35 HI6421V530_LDO15,36 HI6421V530_LDO16,37};38 39static const unsigned int ldo_3_voltages[] = {40 1800000, 1825000, 1850000, 1875000,41 1900000, 1925000, 1950000, 1975000,42 2000000, 2025000, 2050000, 2075000,43 2100000, 2125000, 2150000, 2200000,44};45 46static const unsigned int ldo_9_11_voltages[] = {47 1750000, 1800000, 1825000, 2800000,48 2850000, 2950000, 3000000, 3300000,49};50 51static const unsigned int ldo_15_16_voltages[] = {52 1750000, 1800000, 2400000, 2600000,53 2700000, 2850000, 2950000, 3000000,54};55 56static const struct regulator_ops hi6421v530_ldo_ops;57 58#define HI6421V530_LDO_ENABLE_TIME (350)59 60/*61 * _id - LDO id name string62 * v_table - voltage table63 * vreg - voltage select register64 * vmask - voltage select mask65 * ereg - enable register66 * emask - enable mask67 * odelay - off/on delay time in uS68 * ecomask - eco mode mask69 */70#define HI6421V530_LDO(_ID, v_table, vreg, vmask, ereg, emask, \71 odelay, ecomask) { \72 .rdesc = { \73 .name = #_ID, \74 .of_match = of_match_ptr(#_ID), \75 .regulators_node = of_match_ptr("regulators"), \76 .ops = &hi6421v530_ldo_ops, \77 .type = REGULATOR_VOLTAGE, \78 .id = HI6421V530_##_ID, \79 .owner = THIS_MODULE, \80 .n_voltages = ARRAY_SIZE(v_table), \81 .volt_table = v_table, \82 .vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \83 .vsel_mask = vmask, \84 .enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \85 .enable_mask = emask, \86 .enable_time = HI6421V530_LDO_ENABLE_TIME, \87 .off_on_delay = odelay, \88 }, \89 .mode_mask = ecomask, \90}91 92/* HI6421V530 regulator information */93 94static const struct hi6421v530_regulator_info hi6421v530_regulator_info[] = {95 HI6421V530_LDO(LDO3, ldo_3_voltages, 0x061, 0xf, 0x060, 0x2,96 20000, 0x6),97 HI6421V530_LDO(LDO9, ldo_9_11_voltages, 0x06b, 0x7, 0x06a, 0x2,98 40000, 0x6),99 HI6421V530_LDO(LDO11, ldo_9_11_voltages, 0x06f, 0x7, 0x06e, 0x2,100 40000, 0x6),101 HI6421V530_LDO(LDO15, ldo_15_16_voltages, 0x077, 0x7, 0x076, 0x2,102 40000, 0x6),103 HI6421V530_LDO(LDO16, ldo_15_16_voltages, 0x079, 0x7, 0x078, 0x2,104 40000, 0x6),105};106 107static unsigned int hi6421v530_regulator_ldo_get_mode(108 struct regulator_dev *rdev)109{110 const struct hi6421v530_regulator_info *info;111 unsigned int reg_val;112 113 info = container_of(rdev->desc, struct hi6421v530_regulator_info, rdesc);114 regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val);115 116 if (reg_val & (info->mode_mask))117 return REGULATOR_MODE_IDLE;118 119 return REGULATOR_MODE_NORMAL;120}121 122static int hi6421v530_regulator_ldo_set_mode(struct regulator_dev *rdev,123 unsigned int mode)124{125 const struct hi6421v530_regulator_info *info;126 unsigned int new_mode;127 128 info = container_of(rdev->desc, struct hi6421v530_regulator_info, rdesc);129 switch (mode) {130 case REGULATOR_MODE_NORMAL:131 new_mode = 0;132 break;133 case REGULATOR_MODE_IDLE:134 new_mode = info->mode_mask;135 break;136 default:137 return -EINVAL;138 }139 140 regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,141 info->mode_mask, new_mode);142 143 return 0;144}145 146 147static const struct regulator_ops hi6421v530_ldo_ops = {148 .is_enabled = regulator_is_enabled_regmap,149 .enable = regulator_enable_regmap,150 .disable = regulator_disable_regmap,151 .list_voltage = regulator_list_voltage_table,152 .map_voltage = regulator_map_voltage_ascend,153 .get_voltage_sel = regulator_get_voltage_sel_regmap,154 .set_voltage_sel = regulator_set_voltage_sel_regmap,155 .get_mode = hi6421v530_regulator_ldo_get_mode,156 .set_mode = hi6421v530_regulator_ldo_set_mode,157};158 159static int hi6421v530_regulator_probe(struct platform_device *pdev)160{161 struct hi6421_pmic *pmic;162 struct regulator_dev *rdev;163 struct regulator_config config = { };164 unsigned int i;165 166 pmic = dev_get_drvdata(pdev->dev.parent);167 if (!pmic) {168 dev_err(&pdev->dev, "no pmic in the regulator parent node\n");169 return -ENODEV;170 }171 172 for (i = 0; i < ARRAY_SIZE(hi6421v530_regulator_info); i++) {173 config.dev = pdev->dev.parent;174 config.regmap = pmic->regmap;175 176 rdev = devm_regulator_register(&pdev->dev,177 &hi6421v530_regulator_info[i].rdesc,178 &config);179 if (IS_ERR(rdev)) {180 dev_err(&pdev->dev, "failed to register regulator %s\n",181 hi6421v530_regulator_info[i].rdesc.name);182 return PTR_ERR(rdev);183 }184 }185 return 0;186}187 188static const struct platform_device_id hi6421v530_regulator_table[] = {189 { .name = "hi6421v530-regulator" },190 {},191};192MODULE_DEVICE_TABLE(platform, hi6421v530_regulator_table);193 194static struct platform_driver hi6421v530_regulator_driver = {195 .id_table = hi6421v530_regulator_table,196 .driver = {197 .name = "hi6421v530-regulator",198 .probe_type = PROBE_PREFER_ASYNCHRONOUS,199 },200 .probe = hi6421v530_regulator_probe,201};202module_platform_driver(hi6421v530_regulator_driver);203 204MODULE_AUTHOR("Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>");205MODULE_DESCRIPTION("Hi6421v530 regulator driver");206MODULE_LICENSE("GPL v2");207