drivers/regulator/mt6358-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2019 MediaTek Inc.
   4
   5 #include <linux/mfd/mt6358/registers.h>
   6 #include <linux/mfd/mt6397/core.h>
   7 #include <linux/module.h>
   8 #include <linux/of.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/regmap.h>
  11 #include <linux/regulator/driver.h>
  12 #include <linux/regulator/machine.h>
  13 #include <linux/regulator/mt6358-regulator.h>
  14 #include <linux/regulator/of_regulator.h>
  15
  16 #define MT6358_BUCK_MODE_AUTO   0
  17 #define MT6358_BUCK_MODE_FORCE_PWM      1
  18
  19 /*
  20  * MT6358 regulators' information
  21  *
  22  * @desc: standard fields of regulator description.
  23  * @qi: Mask for query enable signal status of regulators
  24  */
  25 struct mt6358_regulator_info {
  26         struct regulator_desc desc;
  27         u32 status_reg;
  28         u32 qi;
  29         const u32 *index_table;
  30         unsigned int n_table;
  31         u32 vsel_shift;
  32         u32 da_vsel_reg;
  33         u32 da_vsel_mask;
  34         u32 da_vsel_shift;
  35         u32 modeset_reg;
  36         u32 modeset_mask;
  37         u32 modeset_shift;
  38 };
  39
  40 #define MT6358_BUCK(match, vreg, min, max, step,                \
  41         volt_ranges, vosel_mask, _da_vsel_reg, _da_vsel_mask,   \
  42         _da_vsel_shift, _modeset_reg, _modeset_shift)           \
  43 [MT6358_ID_##vreg] = {  \
  44         .desc = {       \
  45                 .name = #vreg,  \
  46                 .of_match = of_match_ptr(match),        \
  47                 .ops = &mt6358_volt_range_ops,  \
  48                 .type = REGULATOR_VOLTAGE,      \
  49                 .id = MT6358_ID_##vreg,         \
  50                 .owner = THIS_MODULE,           \
  51                 .n_voltages = ((max) - (min)) / (step) + 1,     \
  52                 .linear_ranges = volt_ranges,           \
  53                 .n_linear_ranges = ARRAY_SIZE(volt_ranges),     \
  54                 .vsel_reg = MT6358_BUCK_##vreg##_ELR0,  \
  55                 .vsel_mask = vosel_mask,        \
  56                 .enable_reg = MT6358_BUCK_##vreg##_CON0,        \
  57                 .enable_mask = BIT(0),  \
  58                 .of_map_mode = mt6358_map_mode, \
  59         },      \
  60         .status_reg = MT6358_BUCK_##vreg##_DBG1,        \
  61         .qi = BIT(0),   \
  62         .da_vsel_reg = _da_vsel_reg,    \
  63         .da_vsel_mask = _da_vsel_mask,  \
  64         .da_vsel_shift = _da_vsel_shift,        \
  65         .modeset_reg = _modeset_reg,    \
  66         .modeset_mask = BIT(_modeset_shift),    \
  67         .modeset_shift = _modeset_shift \
  68 }
  69
  70 #define MT6358_LDO(match, vreg, ldo_volt_table, \
  71         ldo_index_table, enreg, enbit, vosel,   \
  72         vosel_mask, vosel_shift)        \
  73 [MT6358_ID_##vreg] = {  \
  74         .desc = {       \
  75                 .name = #vreg,  \
  76                 .of_match = of_match_ptr(match),        \
  77                 .ops = &mt6358_volt_table_ops,  \
  78                 .type = REGULATOR_VOLTAGE,      \
  79                 .id = MT6358_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                 .enable_reg = enreg,    \
  86                 .enable_mask = BIT(enbit),      \
  87         },      \
  88         .status_reg = MT6358_LDO_##vreg##_CON1, \
  89         .qi = BIT(15),  \
  90         .index_table = ldo_index_table, \
  91         .n_table = ARRAY_SIZE(ldo_index_table), \
  92         .vsel_shift = vosel_shift,      \
  93 }
  94
  95 #define MT6358_LDO1(match, vreg, min, max, step,        \
  96         volt_ranges, _da_vsel_reg, _da_vsel_mask,       \
  97         _da_vsel_shift, vosel, vosel_mask)      \
  98 [MT6358_ID_##vreg] = {  \
  99         .desc = {       \
 100                 .name = #vreg,  \
 101                 .of_match = of_match_ptr(match),        \
 102                 .ops = &mt6358_volt_range_ops,  \
 103                 .type = REGULATOR_VOLTAGE,      \
 104                 .id = MT6358_ID_##vreg, \
 105                 .owner = THIS_MODULE,   \
 106                 .n_voltages = ((max) - (min)) / (step) + 1,     \
 107                 .linear_ranges = volt_ranges,   \
 108                 .n_linear_ranges = ARRAY_SIZE(volt_ranges),     \
 109                 .vsel_reg = vosel,      \
 110                 .vsel_mask = vosel_mask,        \
 111                 .enable_reg = MT6358_LDO_##vreg##_CON0, \
 112                 .enable_mask = BIT(0),  \
 113         },      \
 114         .da_vsel_reg = _da_vsel_reg,    \
 115         .da_vsel_mask = _da_vsel_mask,  \
 116         .da_vsel_shift = _da_vsel_shift,        \
 117         .status_reg = MT6358_LDO_##vreg##_DBG1, \
 118         .qi = BIT(0),   \
 119 }
 120
 121 #define MT6358_REG_FIXED(match, vreg,   \
 122         enreg, enbit, volt)     \
 123 [MT6358_ID_##vreg] = {  \
 124         .desc = {       \
 125                 .name = #vreg,  \
 126                 .of_match = of_match_ptr(match),        \
 127                 .ops = &mt6358_volt_fixed_ops,  \
 128                 .type = REGULATOR_VOLTAGE,      \
 129                 .id = MT6358_ID_##vreg, \
 130                 .owner = THIS_MODULE,   \
 131                 .n_voltages = 1,        \
 132                 .enable_reg = enreg,    \
 133                 .enable_mask = BIT(enbit),      \
 134                 .min_uV = volt, \
 135         },      \
 136         .status_reg = MT6358_LDO_##vreg##_CON1, \
 137         .qi = BIT(15),                                                  \
 138 }
 139
 140 static const struct linear_range buck_volt_range1[] = {
 141         REGULATOR_LINEAR_RANGE(500000, 0, 0x7f, 6250),
 142 };
 143
 144 static const struct linear_range buck_volt_range2[] = {
 145         REGULATOR_LINEAR_RANGE(500000, 0, 0x7f, 12500),
 146 };
 147
 148 static const struct linear_range buck_volt_range3[] = {
 149         REGULATOR_LINEAR_RANGE(500000, 0, 0x3f, 50000),
 150 };
 151
 152 static const struct linear_range buck_volt_range4[] = {
 153         REGULATOR_LINEAR_RANGE(1000000, 0, 0x7f, 12500),
 154 };
 155
 156 static const u32 vdram2_voltages[] = {
 157         600000, 1800000,
 158 };
 159
 160 static const u32 vsim_voltages[] = {
 161         1700000, 1800000, 2700000, 3000000, 3100000,
 162 };
 163
 164 static const u32 vibr_voltages[] = {
 165         1200000, 1300000, 1500000, 1800000,
 166         2000000, 2800000, 3000000, 3300000,
 167 };
 168
 169 static const u32 vusb_voltages[] = {
 170         3000000, 3100000,
 171 };
 172
 173 static const u32 vcamd_voltages[] = {
 174         900000, 1000000, 1100000, 1200000,
 175         1300000, 1500000, 1800000,
 176 };
 177
 178 static const u32 vefuse_voltages[] = {
 179         1700000, 1800000, 1900000,
 180 };
 181
 182 static const u32 vmch_vemc_voltages[] = {
 183         2900000, 3000000, 3300000,
 184 };
 185
 186 static const u32 vcama_voltages[] = {
 187         1800000, 2500000, 2700000,
 188         2800000, 2900000, 3000000,
 189 };
 190
 191 static const u32 vcn33_bt_wifi_voltages[] = {
 192         3300000, 3400000, 3500000,
 193 };
 194
 195 static const u32 vmc_voltages[] = {
 196         1800000, 2900000, 3000000, 3300000,
 197 };
 198
 199 static const u32 vldo28_voltages[] = {
 200         2800000, 3000000,
 201 };
 202
 203 static const u32 vdram2_idx[] = {
 204         0, 12,
 205 };
 206
 207 static const u32 vsim_idx[] = {
 208         3, 4, 8, 11, 12,
 209 };
 210
 211 static const u32 vibr_idx[] = {
 212         0, 1, 2, 4, 5, 9, 11, 13,
 213 };
 214
 215 static const u32 vusb_idx[] = {
 216         3, 4,
 217 };
 218
 219 static const u32 vcamd_idx[] = {
 220         3, 4, 5, 6, 7, 9, 12,
 221 };
 222
 223 static const u32 vefuse_idx[] = {
 224         11, 12, 13,
 225 };
 226
 227 static const u32 vmch_vemc_idx[] = {
 228         2, 3, 5,
 229 };
 230
 231 static const u32 vcama_idx[] = {
 232         0, 7, 9, 10, 11, 12,
 233 };
 234
 235 static const u32 vcn33_bt_wifi_idx[] = {
 236         1, 2, 3,
 237 };
 238
 239 static const u32 vmc_idx[] = {
 240         4, 10, 11, 13,
 241 };
 242
 243 static const u32 vldo28_idx[] = {
 244         1, 3,
 245 };
 246
 247 static unsigned int mt6358_map_mode(unsigned int mode)
 248 {
 249         return mode == MT6358_BUCK_MODE_AUTO ?
 250                 REGULATOR_MODE_NORMAL : REGULATOR_MODE_FAST;
 251 }
 252
 253 static int mt6358_set_voltage_sel(struct regulator_dev *rdev,
 254                                   unsigned int selector)
 255 {
 256         int idx, ret;
 257         const u32 *pvol;
 258         struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
 259
 260         pvol = info->index_table;
 261
 262         idx = pvol[selector];
 263         ret = regmap_update_bits(rdev->regmap, info->desc.vsel_reg,
 264                                  info->desc.vsel_mask,
 265                                  idx << info->vsel_shift);
 266
 267         return ret;
 268 }
 269
 270 static int mt6358_get_voltage_sel(struct regulator_dev *rdev)
 271 {
 272         int idx, ret;
 273         u32 selector;
 274         struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
 275         const u32 *pvol;
 276
 277         ret = regmap_read(rdev->regmap, info->desc.vsel_reg, &selector);
 278         if (ret != 0) {
 279                 dev_info(&rdev->dev,
 280                          "Failed to get mt6358 %s vsel reg: %d\n",
 281                          info->desc.name, ret);
 282                 return ret;
 283         }
 284
 285         selector = (selector & info->desc.vsel_mask) >> info->vsel_shift;
 286         pvol = info->index_table;
 287         for (idx = 0; idx < info->desc.n_voltages; idx++) {
 288                 if (pvol[idx] == selector)
 289                         return idx;
 290         }
 291
 292         return -EINVAL;
 293 }
 294
 295 static int mt6358_get_buck_voltage_sel(struct regulator_dev *rdev)
 296 {
 297         int ret, regval;
 298         struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
 299
 300         ret = regmap_read(rdev->regmap, info->da_vsel_reg, &regval);
 301         if (ret != 0) {
 302                 dev_err(&rdev->dev,
 303                         "Failed to get mt6358 Buck %s vsel reg: %d\n",
 304                         info->desc.name, ret);
 305                 return ret;
 306         }
 307
 308         ret = (regval >> info->da_vsel_shift) & info->da_vsel_mask;
 309
 310         return ret;
 311 }
 312
 313 static int mt6358_get_status(struct regulator_dev *rdev)
 314 {
 315         int ret;
 316         u32 regval;
 317         struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
 318
 319         ret = regmap_read(rdev->regmap, info->status_reg, &regval);
 320         if (ret != 0) {
 321                 dev_info(&rdev->dev, "Failed to get enable reg: %d\n", ret);
 322                 return ret;
 323         }
 324
 325         return (regval & info->qi) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF;
 326 }
 327
 328 static int mt6358_regulator_set_mode(struct regulator_dev *rdev,
 329                                      unsigned int mode)
 330 {
 331         struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
 332         int val;
 333
 334         switch (mode) {
 335         case REGULATOR_MODE_FAST:
 336                 val = MT6358_BUCK_MODE_FORCE_PWM;
 337                 break;
 338         case REGULATOR_MODE_NORMAL:
 339                 val = MT6358_BUCK_MODE_AUTO;
 340                 break;
 341         default:
 342                 return -EINVAL;
 343         }
 344
 345         dev_dbg(&rdev->dev, "mt6358 buck set_mode %#x, %#x, %#x, %#x\n",
 346                 info->modeset_reg, info->modeset_mask,
 347                 info->modeset_shift, val);
 348
 349         val <<= info->modeset_shift;
 350
 351         return regmap_update_bits(rdev->regmap, info->modeset_reg,
 352                                   info->modeset_mask, val);
 353 }
 354
 355 static unsigned int mt6358_regulator_get_mode(struct regulator_dev *rdev)
 356 {
 357         struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
 358         int ret, regval;
 359
 360         ret = regmap_read(rdev->regmap, info->modeset_reg, &regval);
 361         if (ret != 0) {
 362                 dev_err(&rdev->dev,
 363                         "Failed to get mt6358 buck mode: %d\n", ret);
 364                 return ret;
 365         }
 366
 367         switch ((regval & info->modeset_mask) >> info->modeset_shift) {
 368         case MT6358_BUCK_MODE_AUTO:
 369                 return REGULATOR_MODE_NORMAL;
 370         case MT6358_BUCK_MODE_FORCE_PWM:
 371                 return REGULATOR_MODE_FAST;
 372         default:
 373                 return -EINVAL;
 374         }
 375 }
 376
 377 static const struct regulator_ops mt6358_volt_range_ops = {
 378         .list_voltage = regulator_list_voltage_linear_range,
 379         .map_voltage = regulator_map_voltage_linear_range,
 380         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 381         .get_voltage_sel = mt6358_get_buck_voltage_sel,
 382         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 383         .enable = regulator_enable_regmap,
 384         .disable = regulator_disable_regmap,
 385         .is_enabled = regulator_is_enabled_regmap,
 386         .get_status = mt6358_get_status,
 387         .set_mode = mt6358_regulator_set_mode,
 388         .get_mode = mt6358_regulator_get_mode,
 389 };
 390
 391 static const struct regulator_ops mt6358_volt_table_ops = {
 392         .list_voltage = regulator_list_voltage_table,
 393         .map_voltage = regulator_map_voltage_iterate,
 394         .set_voltage_sel = mt6358_set_voltage_sel,
 395         .get_voltage_sel = mt6358_get_voltage_sel,
 396         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 397         .enable = regulator_enable_regmap,
 398         .disable = regulator_disable_regmap,
 399         .is_enabled = regulator_is_enabled_regmap,
 400         .get_status = mt6358_get_status,
 401 };
 402
 403 static const struct regulator_ops mt6358_volt_fixed_ops = {
 404         .list_voltage = regulator_list_voltage_linear,
 405         .enable = regulator_enable_regmap,
 406         .disable = regulator_disable_regmap,
 407         .is_enabled = regulator_is_enabled_regmap,
 408         .get_status = mt6358_get_status,
 409 };
 410
 411 /* The array is indexed by id(MT6358_ID_XXX) */
 412 static struct mt6358_regulator_info mt6358_regulators[] = {
 413         MT6358_BUCK("buck_vdram1", VDRAM1, 500000, 2087500, 12500,
 414                     buck_volt_range2, 0x7f, MT6358_BUCK_VDRAM1_DBG0, 0x7f,
 415                     0, MT6358_VDRAM1_ANA_CON0, 8),
 416         MT6358_BUCK("buck_vcore", VCORE, 500000, 1293750, 6250,
 417                     buck_volt_range1, 0x7f, MT6358_BUCK_VCORE_DBG0, 0x7f,
 418                     0, MT6358_VCORE_VGPU_ANA_CON0, 1),
 419         MT6358_BUCK("buck_vpa", VPA, 500000, 3650000, 50000,
 420                     buck_volt_range3, 0x3f, MT6358_BUCK_VPA_DBG0, 0x3f, 0,
 421                     MT6358_VPA_ANA_CON0, 3),
 422         MT6358_BUCK("buck_vproc11", VPROC11, 500000, 1293750, 6250,
 423                     buck_volt_range1, 0x7f, MT6358_BUCK_VPROC11_DBG0, 0x7f,
 424                     0, MT6358_VPROC_ANA_CON0, 1),
 425         MT6358_BUCK("buck_vproc12", VPROC12, 500000, 1293750, 6250,
 426                     buck_volt_range1, 0x7f, MT6358_BUCK_VPROC12_DBG0, 0x7f,
 427                     0, MT6358_VPROC_ANA_CON0, 2),
 428         MT6358_BUCK("buck_vgpu", VGPU, 500000, 1293750, 6250,
 429                     buck_volt_range1, 0x7f, MT6358_BUCK_VGPU_ELR0, 0x7f, 0,
 430                     MT6358_VCORE_VGPU_ANA_CON0, 2),
 431         MT6358_BUCK("buck_vs2", VS2, 500000, 2087500, 12500,
 432                     buck_volt_range2, 0x7f, MT6358_BUCK_VS2_DBG0, 0x7f, 0,
 433                     MT6358_VS2_ANA_CON0, 8),
 434         MT6358_BUCK("buck_vmodem", VMODEM, 500000, 1293750, 6250,
 435                     buck_volt_range1, 0x7f, MT6358_BUCK_VMODEM_DBG0, 0x7f,
 436                     0, MT6358_VMODEM_ANA_CON0, 8),
 437         MT6358_BUCK("buck_vs1", VS1, 1000000, 2587500, 12500,
 438                     buck_volt_range4, 0x7f, MT6358_BUCK_VS1_DBG0, 0x7f, 0,
 439                     MT6358_VS1_ANA_CON0, 8),
 440         MT6358_REG_FIXED("ldo_vrf12", VRF12,
 441                          MT6358_LDO_VRF12_CON0, 0, 1200000),
 442         MT6358_REG_FIXED("ldo_vio18", VIO18,
 443                          MT6358_LDO_VIO18_CON0, 0, 1800000),
 444         MT6358_REG_FIXED("ldo_vcamio", VCAMIO,
 445                          MT6358_LDO_VCAMIO_CON0, 0, 1800000),
 446         MT6358_REG_FIXED("ldo_vcn18", VCN18, MT6358_LDO_VCN18_CON0, 0, 1800000),
 447         MT6358_REG_FIXED("ldo_vfe28", VFE28, MT6358_LDO_VFE28_CON0, 0, 2800000),
 448         MT6358_REG_FIXED("ldo_vcn28", VCN28, MT6358_LDO_VCN28_CON0, 0, 2800000),
 449         MT6358_REG_FIXED("ldo_vxo22", VXO22, MT6358_LDO_VXO22_CON0, 0, 2200000),
 450         MT6358_REG_FIXED("ldo_vaux18", VAUX18,
 451                          MT6358_LDO_VAUX18_CON0, 0, 1800000),
 452         MT6358_REG_FIXED("ldo_vbif28", VBIF28,
 453                          MT6358_LDO_VBIF28_CON0, 0, 2800000),
 454         MT6358_REG_FIXED("ldo_vio28", VIO28, MT6358_LDO_VIO28_CON0, 0, 2800000),
 455         MT6358_REG_FIXED("ldo_va12", VA12, MT6358_LDO_VA12_CON0, 0, 1200000),
 456         MT6358_REG_FIXED("ldo_vrf18", VRF18, MT6358_LDO_VRF18_CON0, 0, 1800000),
 457         MT6358_REG_FIXED("ldo_vaud28", VAUD28,
 458                          MT6358_LDO_VAUD28_CON0, 0, 2800000),
 459         MT6358_LDO("ldo_vdram2", VDRAM2, vdram2_voltages, vdram2_idx,
 460                    MT6358_LDO_VDRAM2_CON0, 0, MT6358_LDO_VDRAM2_ELR0, 0x10, 0),
 461         MT6358_LDO("ldo_vsim1", VSIM1, vsim_voltages, vsim_idx,
 462                    MT6358_LDO_VSIM1_CON0, 0, MT6358_VSIM1_ANA_CON0, 0xf00, 8),
 463         MT6358_LDO("ldo_vibr", VIBR, vibr_voltages, vibr_idx,
 464                    MT6358_LDO_VIBR_CON0, 0, MT6358_VIBR_ANA_CON0, 0xf00, 8),
 465         MT6358_LDO("ldo_vusb", VUSB, vusb_voltages, vusb_idx,
 466                    MT6358_LDO_VUSB_CON0_0, 0, MT6358_VUSB_ANA_CON0, 0x700, 8),
 467         MT6358_LDO("ldo_vcamd", VCAMD, vcamd_voltages, vcamd_idx,
 468                    MT6358_LDO_VCAMD_CON0, 0, MT6358_VCAMD_ANA_CON0, 0xf00, 8),
 469         MT6358_LDO("ldo_vefuse", VEFUSE, vefuse_voltages, vefuse_idx,
 470                    MT6358_LDO_VEFUSE_CON0, 0, MT6358_VEFUSE_ANA_CON0, 0xf00, 8),
 471         MT6358_LDO("ldo_vmch", VMCH, vmch_vemc_voltages, vmch_vemc_idx,
 472                    MT6358_LDO_VMCH_CON0, 0, MT6358_VMCH_ANA_CON0, 0x700, 8),
 473         MT6358_LDO("ldo_vcama1", VCAMA1, vcama_voltages, vcama_idx,
 474                    MT6358_LDO_VCAMA1_CON0, 0, MT6358_VCAMA1_ANA_CON0, 0xf00, 8),
 475         MT6358_LDO("ldo_vemc", VEMC, vmch_vemc_voltages, vmch_vemc_idx,
 476                    MT6358_LDO_VEMC_CON0, 0, MT6358_VEMC_ANA_CON0, 0x700, 8),
 477         MT6358_LDO("ldo_vcn33_bt", VCN33_BT, vcn33_bt_wifi_voltages,
 478                    vcn33_bt_wifi_idx, MT6358_LDO_VCN33_CON0_0,
 479                    0, MT6358_VCN33_ANA_CON0, 0x300, 8),
 480         MT6358_LDO("ldo_vcn33_wifi", VCN33_WIFI, vcn33_bt_wifi_voltages,
 481                    vcn33_bt_wifi_idx, MT6358_LDO_VCN33_CON0_1,
 482                    0, MT6358_VCN33_ANA_CON0, 0x300, 8),
 483         MT6358_LDO("ldo_vcama2", VCAMA2, vcama_voltages, vcama_idx,
 484                    MT6358_LDO_VCAMA2_CON0, 0, MT6358_VCAMA2_ANA_CON0, 0xf00, 8),
 485         MT6358_LDO("ldo_vmc", VMC, vmc_voltages, vmc_idx,
 486                    MT6358_LDO_VMC_CON0, 0, MT6358_VMC_ANA_CON0, 0xf00, 8),
 487         MT6358_LDO("ldo_vldo28", VLDO28, vldo28_voltages, vldo28_idx,
 488                    MT6358_LDO_VLDO28_CON0_0, 0,
 489                    MT6358_VLDO28_ANA_CON0, 0x300, 8),
 490         MT6358_LDO("ldo_vsim2", VSIM2, vsim_voltages, vsim_idx,
 491                    MT6358_LDO_VSIM2_CON0, 0, MT6358_VSIM2_ANA_CON0, 0xf00, 8),
 492         MT6358_LDO1("ldo_vsram_proc11", VSRAM_PROC11, 500000, 1293750, 6250,
 493                     buck_volt_range1, MT6358_LDO_VSRAM_PROC11_DBG0, 0x7f, 8,
 494                     MT6358_LDO_VSRAM_CON0, 0x7f),
 495         MT6358_LDO1("ldo_vsram_others", VSRAM_OTHERS, 500000, 1293750, 6250,
 496                     buck_volt_range1, MT6358_LDO_VSRAM_OTHERS_DBG0, 0x7f, 8,
 497                     MT6358_LDO_VSRAM_CON2, 0x7f),
 498         MT6358_LDO1("ldo_vsram_gpu", VSRAM_GPU, 500000, 1293750, 6250,
 499                     buck_volt_range1, MT6358_LDO_VSRAM_GPU_DBG0, 0x7f, 8,
 500                     MT6358_LDO_VSRAM_CON3, 0x7f),
 501         MT6358_LDO1("ldo_vsram_proc12", VSRAM_PROC12, 500000, 1293750, 6250,
 502                     buck_volt_range1, MT6358_LDO_VSRAM_PROC12_DBG0, 0x7f, 8,
 503                     MT6358_LDO_VSRAM_CON1, 0x7f),
 504 };
 505
 506 static int mt6358_regulator_probe(struct platform_device *pdev)
 507 {
 508         struct mt6397_chip *mt6397 = dev_get_drvdata(pdev->dev.parent);
 509         struct regulator_config config = {};
 510         struct regulator_dev *rdev;
 511         int i;
 512
 513         for (i = 0; i < MT6358_MAX_REGULATOR; i++) {
 514                 config.dev = &pdev->dev;
 515                 config.driver_data = &mt6358_regulators[i];
 516                 config.regmap = mt6397->regmap;
 517
 518                 rdev = devm_regulator_register(&pdev->dev,
 519                                                &mt6358_regulators[i].desc,
 520                                                &config);
 521                 if (IS_ERR(rdev)) {
 522                         dev_err(&pdev->dev, "failed to register %s\n",
 523                                 mt6358_regulators[i].desc.name);
 524                         return PTR_ERR(rdev);
 525                 }
 526         }
 527
 528         return 0;
 529 }
 530
 531 static const struct platform_device_id mt6358_platform_ids[] = {
 532         {"mt6358-regulator", 0},
 533         { /* sentinel */ },
 534 };
 535 MODULE_DEVICE_TABLE(platform, mt6358_platform_ids);
 536
 537 static struct platform_driver mt6358_regulator_driver = {
 538         .driver = {
 539                 .name = "mt6358-regulator",
 540         },
 541         .probe = mt6358_regulator_probe,
 542         .id_table = mt6358_platform_ids,
 543 };
 544
 545 module_platform_driver(mt6358_regulator_driver);
 546
 547 MODULE_AUTHOR("Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>");
 548 MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6358 PMIC");
 549 MODULE_LICENSE("GPL");