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1// SPDX-License-Identifier: GPL-2.02//3// Copyright (c) 2022 Collabora Ltd.4// Author: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>5//6// Based on mt6323-regulator.c,7// Copyright (c) 2016 MediaTek Inc.8//9 10#include <linux/module.h>11#include <linux/of.h>12#include <linux/platform_device.h>13#include <linux/regmap.h>14#include <linux/mfd/mt6397/core.h>15#include <linux/mfd/mt6331/registers.h>16#include <linux/regulator/driver.h>17#include <linux/regulator/machine.h>18#include <linux/regulator/mt6331-regulator.h>19#include <linux/regulator/of_regulator.h>20 21#define MT6331_LDO_MODE_NORMAL 022#define MT6331_LDO_MODE_LP 123 24/*25 * MT6331 regulators information26 *27 * @desc: standard fields of regulator description.28 * @qi: Mask for query enable signal status of regulators29 * @vselon_reg: Register sections for hardware control mode of bucks30 * @vselctrl_reg: Register for controlling the buck control mode.31 * @vselctrl_mask: Mask for query buck's voltage control mode.32 * @status_reg: Register for regulator enable status where qi unavailable33 * @status_mask: Mask for querying regulator enable status34 */35struct mt6331_regulator_info {36 struct regulator_desc desc;37 u32 qi;38 u32 vselon_reg;39 u32 vselctrl_reg;40 u32 vselctrl_mask;41 u32 modeset_reg;42 u32 modeset_mask;43 u32 status_reg;44 u32 status_mask;45};46 47#define MT6331_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \48 vosel, vosel_mask, voselon, vosel_ctrl) \49[MT6331_ID_##vreg] = { \50 .desc = { \51 .name = #vreg, \52 .of_match = of_match_ptr(match), \53 .ops = &mt6331_volt_range_ops, \54 .type = REGULATOR_VOLTAGE, \55 .id = MT6331_ID_##vreg, \56 .owner = THIS_MODULE, \57 .n_voltages = (max - min)/step + 1, \58 .linear_ranges = volt_ranges, \59 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \60 .vsel_reg = vosel, \61 .vsel_mask = vosel_mask, \62 .enable_reg = enreg, \63 .enable_mask = BIT(0), \64 }, \65 .qi = BIT(13), \66 .vselon_reg = voselon, \67 .vselctrl_reg = vosel_ctrl, \68 .vselctrl_mask = BIT(1), \69 .status_mask = 0, \70}71 72#define MT6331_LDO_AO(match, vreg, ldo_volt_table, vosel, vosel_mask) \73[MT6331_ID_##vreg] = { \74 .desc = { \75 .name = #vreg, \76 .of_match = of_match_ptr(match), \77 .ops = &mt6331_volt_table_ao_ops, \78 .type = REGULATOR_VOLTAGE, \79 .id = MT6331_ID_##vreg, \80 .owner = THIS_MODULE, \81 .n_voltages = ARRAY_SIZE(ldo_volt_table), \82 .volt_table = ldo_volt_table, \83 .vsel_reg = vosel, \84 .vsel_mask = vosel_mask, \85 }, \86}87 88#define MT6331_LDO_S(match, vreg, ldo_volt_table, enreg, enbit, vosel, \89 vosel_mask, _modeset_reg, _modeset_mask, \90 _status_reg, _status_mask) \91[MT6331_ID_##vreg] = { \92 .desc = { \93 .name = #vreg, \94 .of_match = of_match_ptr(match), \95 .ops = &mt6331_volt_table_no_qi_ops, \96 .type = REGULATOR_VOLTAGE, \97 .id = MT6331_ID_##vreg, \98 .owner = THIS_MODULE, \99 .n_voltages = ARRAY_SIZE(ldo_volt_table), \100 .volt_table = ldo_volt_table, \101 .vsel_reg = vosel, \102 .vsel_mask = vosel_mask, \103 .enable_reg = enreg, \104 .enable_mask = BIT(enbit), \105 }, \106 .modeset_reg = _modeset_reg, \107 .modeset_mask = _modeset_mask, \108 .status_reg = _status_reg, \109 .status_mask = _status_mask, \110}111 112#define MT6331_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel, \113 vosel_mask, _modeset_reg, _modeset_mask) \114[MT6331_ID_##vreg] = { \115 .desc = { \116 .name = #vreg, \117 .of_match = of_match_ptr(match), \118 .ops = (_modeset_reg ? \119 &mt6331_volt_table_ops : \120 &mt6331_volt_table_no_ms_ops), \121 .type = REGULATOR_VOLTAGE, \122 .id = MT6331_ID_##vreg, \123 .owner = THIS_MODULE, \124 .n_voltages = ARRAY_SIZE(ldo_volt_table), \125 .volt_table = ldo_volt_table, \126 .vsel_reg = vosel, \127 .vsel_mask = vosel_mask, \128 .enable_reg = enreg, \129 .enable_mask = BIT(enbit), \130 }, \131 .qi = BIT(15), \132 .modeset_reg = _modeset_reg, \133 .modeset_mask = _modeset_mask, \134}135 136#define MT6331_REG_FIXED(match, vreg, enreg, enbit, qibit, volt, \137 _modeset_reg, _modeset_mask) \138[MT6331_ID_##vreg] = { \139 .desc = { \140 .name = #vreg, \141 .of_match = of_match_ptr(match), \142 .ops = (_modeset_reg ? \143 &mt6331_volt_fixed_ops : \144 &mt6331_volt_fixed_no_ms_ops), \145 .type = REGULATOR_VOLTAGE, \146 .id = MT6331_ID_##vreg, \147 .owner = THIS_MODULE, \148 .n_voltages = 1, \149 .enable_reg = enreg, \150 .enable_mask = BIT(enbit), \151 .min_uV = volt, \152 }, \153 .qi = BIT(qibit), \154 .modeset_reg = _modeset_reg, \155 .modeset_mask = _modeset_mask, \156}157 158static const struct linear_range buck_volt_range[] = {159 REGULATOR_LINEAR_RANGE(700000, 0, 0x7f, 6250),160};161 162static const unsigned int ldo_volt_table1[] = {163 2800000, 3000000, 0, 3200000164};165 166static const unsigned int ldo_volt_table2[] = {167 1500000, 1800000, 2500000, 2800000,168};169 170static const unsigned int ldo_volt_table3[] = {171 1200000, 1300000, 1500000, 1800000, 2000000, 2800000, 3000000, 3300000,172};173 174static const unsigned int ldo_volt_table4[] = {175 0, 0, 1700000, 1800000, 1860000, 2760000, 3000000, 3100000,176};177 178static const unsigned int ldo_volt_table5[] = {179 1800000, 3300000, 1800000, 3300000,180};181 182static const unsigned int ldo_volt_table6[] = {183 3000000, 3300000,184};185 186static const unsigned int ldo_volt_table7[] = {187 1200000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,188};189 190static const unsigned int ldo_volt_table8[] = {191 900000, 1000000, 1100000, 1220000, 1300000, 1500000, 1500000, 1500000,192};193 194static const unsigned int ldo_volt_table9[] = {195 1000000, 1050000, 1100000, 1150000, 1200000, 1250000, 1300000, 1300000,196};197 198static const unsigned int ldo_volt_table10[] = {199 1200000, 1300000, 1500000, 1800000,200};201 202static const unsigned int ldo_volt_table11[] = {203 1200000, 1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1800000,204};205 206static int mt6331_get_status(struct regulator_dev *rdev)207{208 struct mt6331_regulator_info *info = rdev_get_drvdata(rdev);209 u32 regval;210 int ret;211 212 ret = regmap_read(rdev->regmap, info->desc.enable_reg, ®val);213 if (ret != 0) {214 dev_err(&rdev->dev, "Failed to get enable reg: %d\n", ret);215 return ret;216 }217 218 return (regval & info->qi) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF;219}220 221static int mt6331_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)222{223 struct mt6331_regulator_info *info = rdev_get_drvdata(rdev);224 int val;225 226 switch (mode) {227 case REGULATOR_MODE_STANDBY:228 val = MT6331_LDO_MODE_LP;229 break;230 case REGULATOR_MODE_NORMAL:231 val = MT6331_LDO_MODE_NORMAL;232 break;233 default:234 return -EINVAL;235 }236 237 val <<= ffs(info->modeset_mask) - 1;238 239 return regmap_update_bits(rdev->regmap, info->modeset_reg,240 info->modeset_mask, val);241}242 243static unsigned int mt6331_ldo_get_mode(struct regulator_dev *rdev)244{245 struct mt6331_regulator_info *info = rdev_get_drvdata(rdev);246 unsigned int val;247 int ret;248 249 ret = regmap_read(rdev->regmap, info->modeset_reg, &val);250 if (ret < 0)251 return ret;252 253 val &= info->modeset_mask;254 val >>= ffs(info->modeset_mask) - 1;255 256 return (val & BIT(0)) ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL;257}258 259static const struct regulator_ops mt6331_volt_range_ops = {260 .list_voltage = regulator_list_voltage_linear_range,261 .map_voltage = regulator_map_voltage_linear_range,262 .set_voltage_sel = regulator_set_voltage_sel_regmap,263 .get_voltage_sel = regulator_get_voltage_sel_regmap,264 .set_voltage_time_sel = regulator_set_voltage_time_sel,265 .enable = regulator_enable_regmap,266 .disable = regulator_disable_regmap,267 .is_enabled = regulator_is_enabled_regmap,268 .get_status = mt6331_get_status,269};270 271static const struct regulator_ops mt6331_volt_table_no_ms_ops = {272 .list_voltage = regulator_list_voltage_table,273 .map_voltage = regulator_map_voltage_iterate,274 .set_voltage_sel = regulator_set_voltage_sel_regmap,275 .get_voltage_sel = regulator_get_voltage_sel_regmap,276 .set_voltage_time_sel = regulator_set_voltage_time_sel,277 .enable = regulator_enable_regmap,278 .disable = regulator_disable_regmap,279 .is_enabled = regulator_is_enabled_regmap,280 .get_status = mt6331_get_status,281};282 283static const struct regulator_ops mt6331_volt_table_no_qi_ops = {284 .list_voltage = regulator_list_voltage_table,285 .map_voltage = regulator_map_voltage_iterate,286 .set_voltage_sel = regulator_set_voltage_sel_regmap,287 .get_voltage_sel = regulator_get_voltage_sel_regmap,288 .set_voltage_time_sel = regulator_set_voltage_time_sel,289 .enable = regulator_enable_regmap,290 .disable = regulator_disable_regmap,291 .is_enabled = regulator_is_enabled_regmap,292 .set_mode = mt6331_ldo_set_mode,293 .get_mode = mt6331_ldo_get_mode,294};295 296static const struct regulator_ops mt6331_volt_table_ops = {297 .list_voltage = regulator_list_voltage_table,298 .map_voltage = regulator_map_voltage_iterate,299 .set_voltage_sel = regulator_set_voltage_sel_regmap,300 .get_voltage_sel = regulator_get_voltage_sel_regmap,301 .set_voltage_time_sel = regulator_set_voltage_time_sel,302 .enable = regulator_enable_regmap,303 .disable = regulator_disable_regmap,304 .is_enabled = regulator_is_enabled_regmap,305 .get_status = mt6331_get_status,306 .set_mode = mt6331_ldo_set_mode,307 .get_mode = mt6331_ldo_get_mode,308};309 310static const struct regulator_ops mt6331_volt_table_ao_ops = {311 .list_voltage = regulator_list_voltage_table,312 .map_voltage = regulator_map_voltage_iterate,313 .set_voltage_sel = regulator_set_voltage_sel_regmap,314 .get_voltage_sel = regulator_get_voltage_sel_regmap,315 .set_voltage_time_sel = regulator_set_voltage_time_sel,316};317 318static const struct regulator_ops mt6331_volt_fixed_no_ms_ops = {319 .list_voltage = regulator_list_voltage_linear,320 .enable = regulator_enable_regmap,321 .disable = regulator_disable_regmap,322 .is_enabled = regulator_is_enabled_regmap,323 .get_status = mt6331_get_status,324};325 326static const struct regulator_ops mt6331_volt_fixed_ops = {327 .list_voltage = regulator_list_voltage_linear,328 .enable = regulator_enable_regmap,329 .disable = regulator_disable_regmap,330 .is_enabled = regulator_is_enabled_regmap,331 .get_status = mt6331_get_status,332 .set_mode = mt6331_ldo_set_mode,333 .get_mode = mt6331_ldo_get_mode,334};335 336/* The array is indexed by id(MT6331_ID_XXX) */337static struct mt6331_regulator_info mt6331_regulators[] = {338 MT6331_BUCK("buck-vdvfs11", VDVFS11, 700000, 1493750, 6250,339 buck_volt_range, MT6331_VDVFS11_CON9,340 MT6331_VDVFS11_CON11, GENMASK(6, 0),341 MT6331_VDVFS11_CON12, MT6331_VDVFS11_CON7),342 MT6331_BUCK("buck-vdvfs12", VDVFS12, 700000, 1493750, 6250,343 buck_volt_range, MT6331_VDVFS12_CON9,344 MT6331_VDVFS12_CON11, GENMASK(6, 0),345 MT6331_VDVFS12_CON12, MT6331_VDVFS12_CON7),346 MT6331_BUCK("buck-vdvfs13", VDVFS13, 700000, 1493750, 6250,347 buck_volt_range, MT6331_VDVFS13_CON9,348 MT6331_VDVFS13_CON11, GENMASK(6, 0),349 MT6331_VDVFS13_CON12, MT6331_VDVFS13_CON7),350 MT6331_BUCK("buck-vdvfs14", VDVFS14, 700000, 1493750, 6250,351 buck_volt_range, MT6331_VDVFS14_CON9,352 MT6331_VDVFS14_CON11, GENMASK(6, 0),353 MT6331_VDVFS14_CON12, MT6331_VDVFS14_CON7),354 MT6331_BUCK("buck-vcore2", VCORE2, 700000, 1493750, 6250,355 buck_volt_range, MT6331_VCORE2_CON9,356 MT6331_VCORE2_CON11, GENMASK(6, 0),357 MT6331_VCORE2_CON12, MT6331_VCORE2_CON7),358 MT6331_REG_FIXED("buck-vio18", VIO18, MT6331_VIO18_CON9, 0, 13, 1800000, 0, 0),359 MT6331_REG_FIXED("ldo-vrtc", VRTC, MT6331_DIGLDO_CON11, 8, 15, 2800000, 0, 0),360 MT6331_REG_FIXED("ldo-vtcxo1", VTCXO1, MT6331_ANALDO_CON1, 10, 15, 2800000,361 MT6331_ANALDO_CON1, GENMASK(1, 0)),362 MT6331_REG_FIXED("ldo-vtcxo2", VTCXO2, MT6331_ANALDO_CON2, 10, 15, 2800000,363 MT6331_ANALDO_CON2, GENMASK(1, 0)),364 MT6331_REG_FIXED("ldo-vsram", VSRAM_DVFS1, MT6331_SYSLDO_CON4, 10, 15, 1012500,365 MT6331_SYSLDO_CON4, GENMASK(1, 0)),366 MT6331_REG_FIXED("ldo-vio28", VIO28, MT6331_DIGLDO_CON1, 10, 15, 2800000,367 MT6331_DIGLDO_CON1, GENMASK(1, 0)),368 MT6331_LDO("ldo-avdd32aud", AVDD32_AUD, ldo_volt_table1, MT6331_ANALDO_CON3, 10,369 MT6331_ANALDO_CON10, GENMASK(6, 5), MT6331_ANALDO_CON3, GENMASK(1, 0)),370 MT6331_LDO("ldo-vauxa32", VAUXA32, ldo_volt_table1, MT6331_ANALDO_CON4, 10,371 MT6331_ANALDO_CON6, GENMASK(6, 5), MT6331_ANALDO_CON4, GENMASK(1, 0)),372 MT6331_LDO("ldo-vemc33", VEMC33, ldo_volt_table6, MT6331_DIGLDO_CON5, 10,373 MT6331_DIGLDO_CON17, BIT(6), MT6331_DIGLDO_CON5, GENMASK(1, 0)),374 MT6331_LDO("ldo-vibr", VIBR, ldo_volt_table3, MT6331_DIGLDO_CON12, 10,375 MT6331_DIGLDO_CON20, GENMASK(6, 4), MT6331_DIGLDO_CON12, GENMASK(1, 0)),376 MT6331_LDO("ldo-vmc", VMC, ldo_volt_table5, MT6331_DIGLDO_CON3, 10,377 MT6331_DIGLDO_CON15, GENMASK(5, 4), MT6331_DIGLDO_CON3, GENMASK(1, 0)),378 MT6331_LDO("ldo-vmch", VMCH, ldo_volt_table6, MT6331_DIGLDO_CON4, 10,379 MT6331_DIGLDO_CON16, BIT(6), MT6331_DIGLDO_CON4, GENMASK(1, 0)),380 MT6331_LDO("ldo-vmipi", VMIPI, ldo_volt_table3, MT6331_SYSLDO_CON5, 10,381 MT6331_SYSLDO_CON13, GENMASK(5, 3), MT6331_SYSLDO_CON5, GENMASK(1, 0)),382 MT6331_LDO("ldo-vsim1", VSIM1, ldo_volt_table4, MT6331_DIGLDO_CON8, 10,383 MT6331_DIGLDO_CON21, GENMASK(6, 4), MT6331_DIGLDO_CON8, GENMASK(1, 0)),384 MT6331_LDO("ldo-vsim2", VSIM2, ldo_volt_table4, MT6331_DIGLDO_CON9, 10,385 MT6331_DIGLDO_CON22, GENMASK(6, 4), MT6331_DIGLDO_CON9, GENMASK(1, 0)),386 MT6331_LDO("ldo-vusb10", VUSB10, ldo_volt_table9, MT6331_SYSLDO_CON2, 10,387 MT6331_SYSLDO_CON10, GENMASK(5, 3), MT6331_SYSLDO_CON2, GENMASK(1, 0)),388 MT6331_LDO("ldo-vcama", VCAMA, ldo_volt_table2, MT6331_ANALDO_CON5, 15,389 MT6331_ANALDO_CON9, GENMASK(5, 4), 0, 0),390 MT6331_LDO_S("ldo-vcamaf", VCAM_AF, ldo_volt_table3, MT6331_DIGLDO_CON2, 10,391 MT6331_DIGLDO_CON14, GENMASK(6, 4), MT6331_DIGLDO_CON2, GENMASK(1, 0),392 MT6331_EN_STATUS1, BIT(0)),393 MT6331_LDO_S("ldo-vcamd", VCAMD, ldo_volt_table8, MT6331_SYSLDO_CON1, 15,394 MT6331_SYSLDO_CON9, GENMASK(6, 4), MT6331_SYSLDO_CON1, GENMASK(1, 0),395 MT6331_EN_STATUS1, BIT(11)),396 MT6331_LDO_S("ldo-vcamio", VCAM_IO, ldo_volt_table10, MT6331_SYSLDO_CON3, 10,397 MT6331_SYSLDO_CON11, GENMASK(4, 3), MT6331_SYSLDO_CON3, GENMASK(1, 0),398 MT6331_EN_STATUS1, BIT(13)),399 MT6331_LDO_S("ldo-vgp1", VGP1, ldo_volt_table3, MT6331_DIGLDO_CON6, 10,400 MT6331_DIGLDO_CON19, GENMASK(6, 4), MT6331_DIGLDO_CON6, GENMASK(1, 0),401 MT6331_EN_STATUS1, BIT(4)),402 MT6331_LDO_S("ldo-vgp2", VGP2, ldo_volt_table10, MT6331_SYSLDO_CON6, 10,403 MT6331_SYSLDO_CON14, GENMASK(4, 3), MT6331_SYSLDO_CON6, GENMASK(1, 0),404 MT6331_EN_STATUS1, BIT(15)),405 MT6331_LDO_S("ldo-vgp3", VGP3, ldo_volt_table10, MT6331_SYSLDO_CON7, 10,406 MT6331_SYSLDO_CON15, GENMASK(4, 3), MT6331_SYSLDO_CON7, GENMASK(1, 0),407 MT6331_EN_STATUS2, BIT(0)),408 MT6331_LDO_S("ldo-vgp4", VGP4, ldo_volt_table7, MT6331_DIGLDO_CON7, 10,409 MT6331_DIGLDO_CON18, GENMASK(6, 4), MT6331_DIGLDO_CON7, GENMASK(1, 0),410 MT6331_EN_STATUS1, BIT(5)),411 MT6331_LDO_AO("ldo-vdig18", VDIG18, ldo_volt_table11,412 MT6331_DIGLDO_CON28, GENMASK(14, 12)),413};414 415static int mt6331_set_buck_vosel_reg(struct platform_device *pdev)416{417 struct mt6397_chip *mt6331 = dev_get_drvdata(pdev->dev.parent);418 int i;419 u32 regval;420 421 for (i = 0; i < MT6331_ID_VREG_MAX; i++) {422 if (mt6331_regulators[i].vselctrl_reg) {423 if (regmap_read(mt6331->regmap,424 mt6331_regulators[i].vselctrl_reg,425 ®val) < 0) {426 dev_err(&pdev->dev,427 "Failed to read buck ctrl\n");428 return -EIO;429 }430 431 if (regval & mt6331_regulators[i].vselctrl_mask) {432 mt6331_regulators[i].desc.vsel_reg =433 mt6331_regulators[i].vselon_reg;434 }435 }436 }437 438 return 0;439}440 441static int mt6331_regulator_probe(struct platform_device *pdev)442{443 struct mt6397_chip *mt6331 = dev_get_drvdata(pdev->dev.parent);444 struct regulator_config config = {};445 struct regulator_dev *rdev;446 int i;447 u32 reg_value;448 449 /* Query buck controller to select activated voltage register part */450 if (mt6331_set_buck_vosel_reg(pdev))451 return -EIO;452 453 /* Read PMIC chip revision to update constraints and voltage table */454 if (regmap_read(mt6331->regmap, MT6331_HWCID, ®_value) < 0) {455 dev_err(&pdev->dev, "Failed to read Chip ID\n");456 return -EIO;457 }458 reg_value &= GENMASK(7, 0);459 460 dev_info(&pdev->dev, "Chip ID = 0x%x\n", reg_value);461 462 /*463 * ChipID 0x10 is "MT6331 E1", has a different voltage table and464 * it's currently not supported in this driver. Upon detection of465 * this ID, refuse to register the regulators, as we will wrongly466 * interpret the VSEL for this revision, potentially overvolting467 * some device.468 */469 if (reg_value == 0x10) {470 dev_err(&pdev->dev, "Chip version not supported. Bailing out.\n");471 return -EINVAL;472 }473 474 for (i = 0; i < MT6331_ID_VREG_MAX; i++) {475 config.dev = &pdev->dev;476 config.driver_data = &mt6331_regulators[i];477 config.regmap = mt6331->regmap;478 rdev = devm_regulator_register(&pdev->dev,479 &mt6331_regulators[i].desc, &config);480 if (IS_ERR(rdev)) {481 dev_err(&pdev->dev, "failed to register %s\n",482 mt6331_regulators[i].desc.name);483 return PTR_ERR(rdev);484 }485 }486 return 0;487}488 489static const struct platform_device_id mt6331_platform_ids[] = {490 {"mt6331-regulator", 0},491 { /* sentinel */ },492};493MODULE_DEVICE_TABLE(platform, mt6331_platform_ids);494 495static struct platform_driver mt6331_regulator_driver = {496 .driver = {497 .name = "mt6331-regulator",498 .probe_type = PROBE_PREFER_ASYNCHRONOUS,499 },500 .probe = mt6331_regulator_probe,501 .id_table = mt6331_platform_ids,502};503 504module_platform_driver(mt6331_regulator_driver);505 506MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>");507MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6331 PMIC");508MODULE_LICENSE("GPL");509