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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * tps65218-regulator.c4 *5 * Regulator driver for TPS65218 PMIC6 *7 * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/8 */9 10#include <linux/kernel.h>11#include <linux/mod_devicetable.h>12#include <linux/module.h>13#include <linux/device.h>14#include <linux/init.h>15#include <linux/err.h>16#include <linux/platform_device.h>17#include <linux/regmap.h>18#include <linux/regulator/of_regulator.h>19#include <linux/regulator/driver.h>20#include <linux/regulator/machine.h>21#include <linux/mfd/tps65218.h>22 23#define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \24 _em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm, \25 _ct, _ncl) \26 { \27 .name = _name, \28 .of_match = _of, \29 .id = _id, \30 .ops = &_ops, \31 .n_voltages = _n, \32 .type = _type, \33 .owner = THIS_MODULE, \34 .vsel_reg = _vr, \35 .vsel_mask = _vm, \36 .csel_reg = _cr, \37 .csel_mask = _cm, \38 .curr_table = _ct, \39 .n_current_limits = _ncl, \40 .enable_reg = _er, \41 .enable_mask = _em, \42 .volt_table = NULL, \43 .linear_ranges = _lr, \44 .n_linear_ranges = _nlr, \45 .ramp_delay = _delay, \46 .fixed_uV = _fuv, \47 .bypass_reg = _sr, \48 .bypass_mask = _sm, \49 } \50 51static const struct linear_range dcdc1_dcdc2_ranges[] = {52 REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),53 REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),54};55 56static const struct linear_range ldo1_dcdc3_ranges[] = {57 REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),58 REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),59};60 61static const struct linear_range dcdc4_ranges[] = {62 REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),63 REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),64};65 66static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,67 unsigned selector)68{69 int ret;70 struct tps65218 *tps = rdev_get_drvdata(dev);71 unsigned int rid = rdev_get_id(dev);72 73 /* Set the voltage based on vsel value and write protect level is 2 */74 ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,75 selector, TPS65218_PROTECT_L1);76 77 /* Set GO bit for DCDC1/2 to initiate voltage transistion */78 switch (rid) {79 case TPS65218_DCDC_1:80 case TPS65218_DCDC_2:81 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,82 TPS65218_SLEW_RATE_GO,83 TPS65218_SLEW_RATE_GO,84 TPS65218_PROTECT_L1);85 break;86 }87 88 return ret;89}90 91static int tps65218_pmic_enable(struct regulator_dev *dev)92{93 struct tps65218 *tps = rdev_get_drvdata(dev);94 int rid = rdev_get_id(dev);95 96 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)97 return -EINVAL;98 99 /* Enable the regulator and password protection is level 1 */100 return tps65218_set_bits(tps, dev->desc->enable_reg,101 dev->desc->enable_mask, dev->desc->enable_mask,102 TPS65218_PROTECT_L1);103}104 105static int tps65218_pmic_disable(struct regulator_dev *dev)106{107 struct tps65218 *tps = rdev_get_drvdata(dev);108 int rid = rdev_get_id(dev);109 110 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)111 return -EINVAL;112 113 /* Disable the regulator and password protection is level 1 */114 return tps65218_clear_bits(tps, dev->desc->enable_reg,115 dev->desc->enable_mask, TPS65218_PROTECT_L1);116}117 118static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev)119{120 struct tps65218 *tps = rdev_get_drvdata(dev);121 unsigned int rid = rdev_get_id(dev);122 123 if (rid > TPS65218_LDO_1)124 return -EINVAL;125 126 return tps65218_clear_bits(tps, dev->desc->bypass_reg,127 dev->desc->bypass_mask,128 TPS65218_PROTECT_L1);129}130 131static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev)132{133 struct tps65218 *tps = rdev_get_drvdata(dev);134 unsigned int rid = rdev_get_id(dev);135 136 if (rid > TPS65218_LDO_1)137 return -EINVAL;138 139 /*140 * Certain revisions of TPS65218 will need to have DCDC3 regulator141 * enabled always, otherwise an immediate system reboot will occur142 * during poweroff.143 */144 if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1)145 return 0;146 147 if (!tps->strobes[rid]) {148 if (rid == TPS65218_DCDC_3)149 tps->strobes[rid] = 3;150 else151 return -EINVAL;152 }153 154 return tps65218_set_bits(tps, dev->desc->bypass_reg,155 dev->desc->bypass_mask,156 tps->strobes[rid], TPS65218_PROTECT_L1);157}158 159/* Operations permitted on DCDC1, DCDC2 */160static const struct regulator_ops tps65218_dcdc12_ops = {161 .is_enabled = regulator_is_enabled_regmap,162 .enable = tps65218_pmic_enable,163 .disable = tps65218_pmic_disable,164 .get_voltage_sel = regulator_get_voltage_sel_regmap,165 .set_voltage_sel = tps65218_pmic_set_voltage_sel,166 .list_voltage = regulator_list_voltage_linear_range,167 .map_voltage = regulator_map_voltage_linear_range,168 .set_voltage_time_sel = regulator_set_voltage_time_sel,169 .set_suspend_enable = tps65218_pmic_set_suspend_enable,170 .set_suspend_disable = tps65218_pmic_set_suspend_disable,171};172 173/* Operations permitted on DCDC3, DCDC4 and LDO1 */174static const struct regulator_ops tps65218_ldo1_dcdc34_ops = {175 .is_enabled = regulator_is_enabled_regmap,176 .enable = tps65218_pmic_enable,177 .disable = tps65218_pmic_disable,178 .get_voltage_sel = regulator_get_voltage_sel_regmap,179 .set_voltage_sel = tps65218_pmic_set_voltage_sel,180 .list_voltage = regulator_list_voltage_linear_range,181 .map_voltage = regulator_map_voltage_linear_range,182 .set_suspend_enable = tps65218_pmic_set_suspend_enable,183 .set_suspend_disable = tps65218_pmic_set_suspend_disable,184};185 186static const unsigned int ls3_currents[] = { 100000, 200000, 500000, 1000000 };187 188static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev,189 int lim_uA)190{191 unsigned int index = 0;192 unsigned int num_currents = ARRAY_SIZE(ls3_currents);193 struct tps65218 *tps = rdev_get_drvdata(dev);194 195 while (index < num_currents && ls3_currents[index] != lim_uA)196 index++;197 198 if (index == num_currents)199 return -EINVAL;200 201 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,202 index << __builtin_ctz(dev->desc->csel_mask),203 TPS65218_PROTECT_L1);204}205 206static int tps65218_pmic_set_current_limit(struct regulator_dev *dev,207 int min_uA, int max_uA)208{209 int index = 0;210 unsigned int num_currents = ARRAY_SIZE(ls3_currents);211 struct tps65218 *tps = rdev_get_drvdata(dev);212 213 while (index < num_currents && ls3_currents[index] <= max_uA)214 index++;215 216 index--;217 218 if (index < 0 || ls3_currents[index] < min_uA)219 return -EINVAL;220 221 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,222 index << __builtin_ctz(dev->desc->csel_mask),223 TPS65218_PROTECT_L1);224}225 226static const struct regulator_ops tps65218_ls23_ops = {227 .is_enabled = regulator_is_enabled_regmap,228 .enable = tps65218_pmic_enable,229 .disable = tps65218_pmic_disable,230 .set_input_current_limit = tps65218_pmic_set_input_current_lim,231 .set_current_limit = tps65218_pmic_set_current_limit,232 .get_current_limit = regulator_get_current_limit_regmap,233};234 235/* Operations permitted on DCDC5, DCDC6 */236static const struct regulator_ops tps65218_dcdc56_pmic_ops = {237 .is_enabled = regulator_is_enabled_regmap,238 .enable = tps65218_pmic_enable,239 .disable = tps65218_pmic_disable,240 .set_suspend_enable = tps65218_pmic_set_suspend_enable,241 .set_suspend_disable = tps65218_pmic_set_suspend_disable,242};243 244static const struct regulator_desc regulators[] = {245 TPS65218_REGULATOR("DCDC1", "regulator-dcdc1", TPS65218_DCDC_1,246 REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64,247 TPS65218_REG_CONTROL_DCDC1,248 TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1,249 TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges,250 2, 4000, 0, TPS65218_REG_SEQ3,251 TPS65218_SEQ3_DC1_SEQ_MASK, NULL, 0),252 TPS65218_REGULATOR("DCDC2", "regulator-dcdc2", TPS65218_DCDC_2,253 REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64,254 TPS65218_REG_CONTROL_DCDC2,255 TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1,256 TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges,257 2, 4000, 0, TPS65218_REG_SEQ3,258 TPS65218_SEQ3_DC2_SEQ_MASK, NULL, 0),259 TPS65218_REGULATOR("DCDC3", "regulator-dcdc3", TPS65218_DCDC_3,260 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64,261 TPS65218_REG_CONTROL_DCDC3,262 TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,263 TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2,264 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK,265 NULL, 0),266 TPS65218_REGULATOR("DCDC4", "regulator-dcdc4", TPS65218_DCDC_4,267 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53,268 TPS65218_REG_CONTROL_DCDC4,269 TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1,270 TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2,271 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK,272 NULL, 0),273 TPS65218_REGULATOR("DCDC5", "regulator-dcdc5", TPS65218_DCDC_5,274 REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1,275 -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0,276 0, NULL, 0, 0, 1000000, TPS65218_REG_SEQ5,277 TPS65218_SEQ5_DC5_SEQ_MASK, NULL, 0),278 TPS65218_REGULATOR("DCDC6", "regulator-dcdc6", TPS65218_DCDC_6,279 REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1,280 -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0,281 0, NULL, 0, 0, 1800000, TPS65218_REG_SEQ5,282 TPS65218_SEQ5_DC6_SEQ_MASK, NULL, 0),283 TPS65218_REGULATOR("LDO1", "regulator-ldo1", TPS65218_LDO_1,284 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64,285 TPS65218_REG_CONTROL_LDO1,286 TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,287 TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges,288 2, 0, 0, TPS65218_REG_SEQ6,289 TPS65218_SEQ6_LDO1_SEQ_MASK, NULL, 0),290 TPS65218_REGULATOR("LS2", "regulator-ls2", TPS65218_LS_2,291 REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0,292 TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS2_EN,293 TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS2ILIM_MASK,294 NULL, 0, 0, 0, 0, 0, ls3_currents,295 ARRAY_SIZE(ls3_currents)),296 TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3,297 REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0,298 TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN,299 TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK,300 NULL, 0, 0, 0, 0, 0, ls3_currents,301 ARRAY_SIZE(ls3_currents)),302};303 304static int tps65218_regulator_probe(struct platform_device *pdev)305{306 struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);307 struct regulator_dev *rdev;308 struct regulator_config config = { };309 int i, ret;310 unsigned int val;311 312 config.dev = &pdev->dev;313 config.dev->of_node = tps->dev->of_node;314 config.driver_data = tps;315 config.regmap = tps->regmap;316 317 /* Allocate memory for strobes */318 tps->strobes = devm_kcalloc(&pdev->dev,319 TPS65218_NUM_REGULATOR, sizeof(u8),320 GFP_KERNEL);321 if (!tps->strobes)322 return -ENOMEM;323 324 for (i = 0; i < ARRAY_SIZE(regulators); i++) {325 rdev = devm_regulator_register(&pdev->dev, ®ulators[i],326 &config);327 if (IS_ERR(rdev)) {328 dev_err(tps->dev, "failed to register %s regulator\n",329 pdev->name);330 return PTR_ERR(rdev);331 }332 333 ret = regmap_read(tps->regmap, regulators[i].bypass_reg, &val);334 if (ret)335 return ret;336 337 tps->strobes[i] = val & regulators[i].bypass_mask;338 }339 340 return 0;341}342 343static const struct platform_device_id tps65218_regulator_id_table[] = {344 { "tps65218-regulator", },345 { /* sentinel */ }346};347MODULE_DEVICE_TABLE(platform, tps65218_regulator_id_table);348 349static struct platform_driver tps65218_regulator_driver = {350 .driver = {351 .name = "tps65218-pmic",352 .probe_type = PROBE_PREFER_ASYNCHRONOUS,353 },354 .probe = tps65218_regulator_probe,355 .id_table = tps65218_regulator_id_table,356};357 358module_platform_driver(tps65218_regulator_driver);359 360MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");361MODULE_DESCRIPTION("TPS65218 voltage regulator driver");362MODULE_ALIAS("platform:tps65218-pmic");363MODULE_LICENSE("GPL v2");364