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1// SPDX-License-Identifier: GPL-2.02/*3 * AS3711 PMIC regulator driver, using DCDC Step Down and LDO supplies4 *5 * Copyright (C) 2012 Renesas Electronics Corporation6 * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>7 */8 9#include <linux/err.h>10#include <linux/init.h>11#include <linux/mfd/as3711.h>12#include <linux/module.h>13#include <linux/of.h>14#include <linux/platform_device.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 * The regulator API supports 4 modes of operataion: FAST, NORMAL, IDLE and22 * STANDBY. We map them in the following way to AS3711 SD1-4 DCDC modes:23 * FAST: sdX_fast=124 * NORMAL: low_noise=125 * IDLE: low_noise=026 */27 28static int as3711_set_mode_sd(struct regulator_dev *rdev, unsigned int mode)29{30 unsigned int fast_bit = rdev->desc->enable_mask,31 low_noise_bit = fast_bit << 4;32 u8 val;33 34 switch (mode) {35 case REGULATOR_MODE_FAST:36 val = fast_bit | low_noise_bit;37 break;38 case REGULATOR_MODE_NORMAL:39 val = low_noise_bit;40 break;41 case REGULATOR_MODE_IDLE:42 val = 0;43 break;44 default:45 return -EINVAL;46 }47 48 return regmap_update_bits(rdev->regmap, AS3711_SD_CONTROL_1,49 low_noise_bit | fast_bit, val);50}51 52static unsigned int as3711_get_mode_sd(struct regulator_dev *rdev)53{54 unsigned int fast_bit = rdev->desc->enable_mask,55 low_noise_bit = fast_bit << 4, mask = fast_bit | low_noise_bit;56 unsigned int val;57 int ret = regmap_read(rdev->regmap, AS3711_SD_CONTROL_1, &val);58 59 if (ret < 0)60 return ret;61 62 if ((val & mask) == mask)63 return REGULATOR_MODE_FAST;64 65 if ((val & mask) == low_noise_bit)66 return REGULATOR_MODE_NORMAL;67 68 if (!(val & mask))69 return REGULATOR_MODE_IDLE;70 71 return -EINVAL;72}73 74static const struct regulator_ops as3711_sd_ops = {75 .is_enabled = regulator_is_enabled_regmap,76 .enable = regulator_enable_regmap,77 .disable = regulator_disable_regmap,78 .get_voltage_sel = regulator_get_voltage_sel_regmap,79 .set_voltage_sel = regulator_set_voltage_sel_regmap,80 .list_voltage = regulator_list_voltage_linear_range,81 .map_voltage = regulator_map_voltage_linear_range,82 .get_mode = as3711_get_mode_sd,83 .set_mode = as3711_set_mode_sd,84};85 86static const struct regulator_ops as3711_aldo_ops = {87 .is_enabled = regulator_is_enabled_regmap,88 .enable = regulator_enable_regmap,89 .disable = regulator_disable_regmap,90 .get_voltage_sel = regulator_get_voltage_sel_regmap,91 .set_voltage_sel = regulator_set_voltage_sel_regmap,92 .list_voltage = regulator_list_voltage_linear_range,93 .map_voltage = regulator_map_voltage_linear_range,94};95 96static const struct regulator_ops as3711_dldo_ops = {97 .is_enabled = regulator_is_enabled_regmap,98 .enable = regulator_enable_regmap,99 .disable = regulator_disable_regmap,100 .get_voltage_sel = regulator_get_voltage_sel_regmap,101 .set_voltage_sel = regulator_set_voltage_sel_regmap,102 .list_voltage = regulator_list_voltage_linear_range,103 .map_voltage = regulator_map_voltage_linear_range,104};105 106static const struct linear_range as3711_sd_ranges[] = {107 REGULATOR_LINEAR_RANGE(612500, 0x1, 0x40, 12500),108 REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000),109 REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7f, 50000),110};111 112static const struct linear_range as3711_aldo_ranges[] = {113 REGULATOR_LINEAR_RANGE(1200000, 0, 0xf, 50000),114 REGULATOR_LINEAR_RANGE(1800000, 0x10, 0x1f, 100000),115};116 117static const struct linear_range as3711_dldo_ranges[] = {118 REGULATOR_LINEAR_RANGE(900000, 0, 0x10, 50000),119 REGULATOR_LINEAR_RANGE(1750000, 0x20, 0x3f, 50000),120};121 122#define AS3711_REG(_id, _en_reg, _en_bit, _vmask, _sfx) \123 [AS3711_REGULATOR_ ## _id] = { \124 .name = "as3711-regulator-" # _id, \125 .id = AS3711_REGULATOR_ ## _id, \126 .n_voltages = (_vmask + 1), \127 .ops = &as3711_ ## _sfx ## _ops, \128 .type = REGULATOR_VOLTAGE, \129 .owner = THIS_MODULE, \130 .vsel_reg = AS3711_ ## _id ## _VOLTAGE, \131 .vsel_mask = _vmask, \132 .enable_reg = AS3711_ ## _en_reg, \133 .enable_mask = BIT(_en_bit), \134 .linear_ranges = as3711_ ## _sfx ## _ranges, \135 .n_linear_ranges = ARRAY_SIZE(as3711_ ## _sfx ## _ranges), \136}137 138static const struct regulator_desc as3711_reg_desc[] = {139 AS3711_REG(SD_1, SD_CONTROL, 0, 0x7f, sd),140 AS3711_REG(SD_2, SD_CONTROL, 1, 0x7f, sd),141 AS3711_REG(SD_3, SD_CONTROL, 2, 0x7f, sd),142 AS3711_REG(SD_4, SD_CONTROL, 3, 0x7f, sd),143 AS3711_REG(LDO_1, LDO_1_VOLTAGE, 7, 0x1f, aldo),144 AS3711_REG(LDO_2, LDO_2_VOLTAGE, 7, 0x1f, aldo),145 AS3711_REG(LDO_3, LDO_3_VOLTAGE, 7, 0x3f, dldo),146 AS3711_REG(LDO_4, LDO_4_VOLTAGE, 7, 0x3f, dldo),147 AS3711_REG(LDO_5, LDO_5_VOLTAGE, 7, 0x3f, dldo),148 AS3711_REG(LDO_6, LDO_6_VOLTAGE, 7, 0x3f, dldo),149 AS3711_REG(LDO_7, LDO_7_VOLTAGE, 7, 0x3f, dldo),150 AS3711_REG(LDO_8, LDO_8_VOLTAGE, 7, 0x3f, dldo),151 /* StepUp output voltage depends on supplying regulator */152};153 154#define AS3711_REGULATOR_NUM ARRAY_SIZE(as3711_reg_desc)155 156static struct of_regulator_match157as3711_regulator_matches[AS3711_REGULATOR_NUM] = {158 [AS3711_REGULATOR_SD_1] = { .name = "sd1" },159 [AS3711_REGULATOR_SD_2] = { .name = "sd2" },160 [AS3711_REGULATOR_SD_3] = { .name = "sd3" },161 [AS3711_REGULATOR_SD_4] = { .name = "sd4" },162 [AS3711_REGULATOR_LDO_1] = { .name = "ldo1" },163 [AS3711_REGULATOR_LDO_2] = { .name = "ldo2" },164 [AS3711_REGULATOR_LDO_3] = { .name = "ldo3" },165 [AS3711_REGULATOR_LDO_4] = { .name = "ldo4" },166 [AS3711_REGULATOR_LDO_5] = { .name = "ldo5" },167 [AS3711_REGULATOR_LDO_6] = { .name = "ldo6" },168 [AS3711_REGULATOR_LDO_7] = { .name = "ldo7" },169 [AS3711_REGULATOR_LDO_8] = { .name = "ldo8" },170};171 172static int as3711_regulator_parse_dt(struct device *dev,173 struct device_node **of_node, const int count)174{175 struct as3711_regulator_pdata *pdata = dev_get_platdata(dev);176 struct device_node *regulators =177 of_get_child_by_name(dev->parent->of_node, "regulators");178 struct of_regulator_match *match;179 int ret, i;180 181 if (!regulators) {182 dev_err(dev, "regulator node not found\n");183 return -ENODEV;184 }185 186 ret = of_regulator_match(dev->parent, regulators,187 as3711_regulator_matches, count);188 of_node_put(regulators);189 if (ret < 0) {190 dev_err(dev, "Error parsing regulator init data: %d\n", ret);191 return ret;192 }193 194 for (i = 0, match = as3711_regulator_matches; i < count; i++, match++)195 if (match->of_node) {196 pdata->init_data[i] = match->init_data;197 of_node[i] = match->of_node;198 }199 200 return 0;201}202 203static int as3711_regulator_probe(struct platform_device *pdev)204{205 struct as3711_regulator_pdata *pdata = dev_get_platdata(&pdev->dev);206 struct as3711 *as3711 = dev_get_drvdata(pdev->dev.parent);207 struct regulator_config config = {.dev = &pdev->dev,};208 struct device_node *of_node[AS3711_REGULATOR_NUM] = {};209 struct regulator_dev *rdev;210 int ret;211 int id;212 213 if (!pdata) {214 dev_err(&pdev->dev, "No platform data...\n");215 return -ENODEV;216 }217 218 if (pdev->dev.parent->of_node) {219 ret = as3711_regulator_parse_dt(&pdev->dev, of_node, AS3711_REGULATOR_NUM);220 if (ret < 0) {221 dev_err(&pdev->dev, "DT parsing failed: %d\n", ret);222 return ret;223 }224 }225 226 for (id = 0; id < AS3711_REGULATOR_NUM; id++) {227 config.init_data = pdata->init_data[id];228 config.regmap = as3711->regmap;229 config.of_node = of_node[id];230 231 rdev = devm_regulator_register(&pdev->dev, &as3711_reg_desc[id],232 &config);233 if (IS_ERR(rdev)) {234 dev_err(&pdev->dev, "Failed to register regulator %s\n",235 as3711_reg_desc[id].name);236 return PTR_ERR(rdev);237 }238 }239 240 return 0;241}242 243static struct platform_driver as3711_regulator_driver = {244 .driver = {245 .name = "as3711-regulator",246 .probe_type = PROBE_PREFER_ASYNCHRONOUS,247 },248 .probe = as3711_regulator_probe,249};250 251static int __init as3711_regulator_init(void)252{253 return platform_driver_register(&as3711_regulator_driver);254}255subsys_initcall(as3711_regulator_init);256 257static void __exit as3711_regulator_exit(void)258{259 platform_driver_unregister(&as3711_regulator_driver);260}261module_exit(as3711_regulator_exit);262 263MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");264MODULE_DESCRIPTION("AS3711 regulator driver");265MODULE_ALIAS("platform:as3711-regulator");266MODULE_LICENSE("GPL v2");267