1// SPDX-License-Identifier: GPL-2.0 2// 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 0 22#define MT6331_LDO_MODE_LP 1 23 24/* 25 * MT6331 regulators information 26 * 27 * @desc: standard fields of regulator description. 28 * @qi: Mask for query enable signal status of regulators 29 * @vselon_reg: Register sections for hardware control mode of bucks 30 * @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 unavailable 33 * @status_mask: Mask for querying regulator enable status 34 */ 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, 3200000 164}; 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 and 464 * it's currently not supported in this driver. Upon detection of 465 * this ID, refuse to register the regulators, as we will wrongly 466 * interpret the VSEL for this revision, potentially overvolting 467 * 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