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1// SPDX-License-Identifier: GPL-2.02//3// Lochnagar regulator driver4//5// Copyright (c) 2017-2018 Cirrus Logic, Inc. and6// Cirrus Logic International Semiconductor Ltd.7//8// Author: Charles Keepax <ckeepax@opensource.cirrus.com>9 10#include <linux/bitops.h>11#include <linux/device.h>12#include <linux/err.h>13#include <linux/module.h>14#include <linux/mutex.h>15#include <linux/of.h>16#include <linux/platform_device.h>17#include <linux/regmap.h>18#include <linux/regulator/driver.h>19#include <linux/regulator/machine.h>20#include <linux/regulator/of_regulator.h>21 22#include <linux/mfd/lochnagar.h>23#include <linux/mfd/lochnagar1_regs.h>24#include <linux/mfd/lochnagar2_regs.h>25 26static const struct regulator_ops lochnagar_micvdd_ops = {27 .enable = regulator_enable_regmap,28 .disable = regulator_disable_regmap,29 .is_enabled = regulator_is_enabled_regmap,30 31 .list_voltage = regulator_list_voltage_linear_range,32 .map_voltage = regulator_map_voltage_linear_range,33 34 .get_voltage_sel = regulator_get_voltage_sel_regmap,35 .set_voltage_sel = regulator_set_voltage_sel_regmap,36};37 38static const struct linear_range lochnagar_micvdd_ranges[] = {39 REGULATOR_LINEAR_RANGE(1000000, 0, 0xC, 50000),40 REGULATOR_LINEAR_RANGE(1700000, 0xD, 0x1F, 100000),41};42 43static int lochnagar_micbias_enable(struct regulator_dev *rdev)44{45 struct lochnagar *lochnagar = rdev_get_drvdata(rdev);46 int ret;47 48 mutex_lock(&lochnagar->analogue_config_lock);49 50 ret = regulator_enable_regmap(rdev);51 if (ret < 0)52 goto err;53 54 ret = lochnagar_update_config(lochnagar);55 56err:57 mutex_unlock(&lochnagar->analogue_config_lock);58 59 return ret;60}61 62static int lochnagar_micbias_disable(struct regulator_dev *rdev)63{64 struct lochnagar *lochnagar = rdev_get_drvdata(rdev);65 int ret;66 67 mutex_lock(&lochnagar->analogue_config_lock);68 69 ret = regulator_disable_regmap(rdev);70 if (ret < 0)71 goto err;72 73 ret = lochnagar_update_config(lochnagar);74 75err:76 mutex_unlock(&lochnagar->analogue_config_lock);77 78 return ret;79}80 81static const struct regulator_ops lochnagar_micbias_ops = {82 .enable = lochnagar_micbias_enable,83 .disable = lochnagar_micbias_disable,84 .is_enabled = regulator_is_enabled_regmap,85};86 87static const struct regulator_ops lochnagar_vddcore_ops = {88 .enable = regulator_enable_regmap,89 .disable = regulator_disable_regmap,90 .is_enabled = regulator_is_enabled_regmap,91 92 .list_voltage = regulator_list_voltage_linear_range,93 .map_voltage = regulator_map_voltage_linear_range,94 95 .get_voltage_sel = regulator_get_voltage_sel_regmap,96 .set_voltage_sel = regulator_set_voltage_sel_regmap,97};98 99static const struct linear_range lochnagar_vddcore_ranges[] = {100 REGULATOR_LINEAR_RANGE(600000, 0, 0x7, 0),101 REGULATOR_LINEAR_RANGE(600000, 0x8, 0x41, 12500),102};103 104enum lochnagar_regulators {105 LOCHNAGAR_MICVDD,106 LOCHNAGAR_MIC1VDD,107 LOCHNAGAR_MIC2VDD,108 LOCHNAGAR_VDDCORE,109};110 111static int lochnagar_micbias_of_parse(struct device_node *np,112 const struct regulator_desc *desc,113 struct regulator_config *config)114{115 struct lochnagar *lochnagar = config->driver_data;116 int shift = (desc->id - LOCHNAGAR_MIC1VDD) *117 LOCHNAGAR2_P2_MICBIAS_SRC_SHIFT;118 int mask = LOCHNAGAR2_P1_MICBIAS_SRC_MASK << shift;119 unsigned int val;120 int ret;121 122 ret = of_property_read_u32(np, "cirrus,micbias-input", &val);123 if (ret >= 0) {124 mutex_lock(&lochnagar->analogue_config_lock);125 ret = regmap_update_bits(lochnagar->regmap,126 LOCHNAGAR2_ANALOGUE_PATH_CTRL2,127 mask, val << shift);128 mutex_unlock(&lochnagar->analogue_config_lock);129 if (ret < 0) {130 dev_err(lochnagar->dev,131 "Failed to update micbias source: %d\n", ret);132 return ret;133 }134 }135 136 return 0;137}138 139static const struct regulator_desc lochnagar_regulators[] = {140 [LOCHNAGAR_MICVDD] = {141 .name = "MICVDD",142 .supply_name = "SYSVDD",143 .type = REGULATOR_VOLTAGE,144 .n_voltages = 32,145 .ops = &lochnagar_micvdd_ops,146 147 .id = LOCHNAGAR_MICVDD,148 .of_match = of_match_ptr("MICVDD"),149 150 .enable_reg = LOCHNAGAR2_MICVDD_CTRL1,151 .enable_mask = LOCHNAGAR2_MICVDD_REG_ENA_MASK,152 .vsel_reg = LOCHNAGAR2_MICVDD_CTRL2,153 .vsel_mask = LOCHNAGAR2_MICVDD_VSEL_MASK,154 155 .linear_ranges = lochnagar_micvdd_ranges,156 .n_linear_ranges = ARRAY_SIZE(lochnagar_micvdd_ranges),157 158 .enable_time = 3000,159 .ramp_delay = 1000,160 161 .owner = THIS_MODULE,162 },163 [LOCHNAGAR_MIC1VDD] = {164 .name = "MIC1VDD",165 .supply_name = "MICBIAS1",166 .type = REGULATOR_VOLTAGE,167 .ops = &lochnagar_micbias_ops,168 169 .id = LOCHNAGAR_MIC1VDD,170 .of_match = of_match_ptr("MIC1VDD"),171 .of_parse_cb = lochnagar_micbias_of_parse,172 173 .enable_reg = LOCHNAGAR2_ANALOGUE_PATH_CTRL2,174 .enable_mask = LOCHNAGAR2_P1_INPUT_BIAS_ENA_MASK,175 176 .owner = THIS_MODULE,177 },178 [LOCHNAGAR_MIC2VDD] = {179 .name = "MIC2VDD",180 .supply_name = "MICBIAS2",181 .type = REGULATOR_VOLTAGE,182 .ops = &lochnagar_micbias_ops,183 184 .id = LOCHNAGAR_MIC2VDD,185 .of_match = of_match_ptr("MIC2VDD"),186 .of_parse_cb = lochnagar_micbias_of_parse,187 188 .enable_reg = LOCHNAGAR2_ANALOGUE_PATH_CTRL2,189 .enable_mask = LOCHNAGAR2_P2_INPUT_BIAS_ENA_MASK,190 191 .owner = THIS_MODULE,192 },193 [LOCHNAGAR_VDDCORE] = {194 .name = "VDDCORE",195 .supply_name = "SYSVDD",196 .type = REGULATOR_VOLTAGE,197 .n_voltages = 66,198 .ops = &lochnagar_vddcore_ops,199 200 .id = LOCHNAGAR_VDDCORE,201 .of_match = of_match_ptr("VDDCORE"),202 203 .enable_reg = LOCHNAGAR2_VDDCORE_CDC_CTRL1,204 .enable_mask = LOCHNAGAR2_VDDCORE_CDC_REG_ENA_MASK,205 .vsel_reg = LOCHNAGAR2_VDDCORE_CDC_CTRL2,206 .vsel_mask = LOCHNAGAR2_VDDCORE_CDC_VSEL_MASK,207 208 .linear_ranges = lochnagar_vddcore_ranges,209 .n_linear_ranges = ARRAY_SIZE(lochnagar_vddcore_ranges),210 211 .enable_time = 3000,212 .ramp_delay = 1000,213 .off_on_delay = 15000,214 215 .owner = THIS_MODULE,216 },217};218 219static const struct of_device_id lochnagar_of_match[] = {220 {221 .compatible = "cirrus,lochnagar2-micvdd",222 .data = &lochnagar_regulators[LOCHNAGAR_MICVDD],223 },224 {225 .compatible = "cirrus,lochnagar2-mic1vdd",226 .data = &lochnagar_regulators[LOCHNAGAR_MIC1VDD],227 },228 {229 .compatible = "cirrus,lochnagar2-mic2vdd",230 .data = &lochnagar_regulators[LOCHNAGAR_MIC2VDD],231 },232 {233 .compatible = "cirrus,lochnagar2-vddcore",234 .data = &lochnagar_regulators[LOCHNAGAR_VDDCORE],235 },236 {}237};238MODULE_DEVICE_TABLE(of, lochnagar_of_match);239 240static int lochnagar_regulator_probe(struct platform_device *pdev)241{242 struct device *dev = &pdev->dev;243 struct lochnagar *lochnagar = dev_get_drvdata(dev->parent);244 struct regulator_config config = { };245 const struct regulator_desc *desc;246 struct regulator_dev *rdev;247 int ret;248 249 config.dev = dev;250 config.regmap = lochnagar->regmap;251 config.driver_data = lochnagar;252 253 desc = device_get_match_data(dev);254 if (!desc)255 return -EINVAL;256 257 rdev = devm_regulator_register(dev, desc, &config);258 if (IS_ERR(rdev)) {259 ret = PTR_ERR(rdev);260 dev_err(dev, "Failed to register %s regulator: %d\n",261 desc->name, ret);262 return ret;263 }264 265 return 0;266}267 268static struct platform_driver lochnagar_regulator_driver = {269 .driver = {270 .name = "lochnagar-regulator",271 .probe_type = PROBE_PREFER_ASYNCHRONOUS,272 .of_match_table = of_match_ptr(lochnagar_of_match),273 },274 275 .probe = lochnagar_regulator_probe,276};277module_platform_driver(lochnagar_regulator_driver);278 279MODULE_AUTHOR("Charles Keepax <ckeepax@opensource.cirrus.com>");280MODULE_DESCRIPTION("Regulator driver for Cirrus Logic Lochnagar Board");281MODULE_LICENSE("GPL v2");282MODULE_ALIAS("platform:lochnagar-regulator");283