drivers/regulator/fan53555.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // FAN53555 Fairchild Digitally Programmable TinyBuck Regulator Driver.
   4 //
   5 // Supported Part Numbers:
   6 // FAN53555UC00X/01X/03X/04X/05X
   7 //
   8 // Copyright (c) 2012 Marvell Technology Ltd.
   9 // Yunfan Zhang <yfzhang@marvell.com>
  10
  11 #include <linux/bitops.h>
  12 #include <linux/err.h>
  13 #include <linux/i2c.h>
  14 #include <linux/module.h>
  15 #include <linux/of.h>
  16 #include <linux/param.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/regmap.h>
  19 #include <linux/regulator/driver.h>
  20 #include <linux/regulator/fan53555.h>
  21 #include <linux/regulator/machine.h>
  22 #include <linux/regulator/of_regulator.h>
  23 #include <linux/slab.h>
  24
  25 /* Voltage setting */
  26 #define FAN53555_VSEL0          0x00
  27 #define FAN53555_VSEL1          0x01
  28
  29 #define RK8602_VSEL0            0x06
  30 #define RK8602_VSEL1            0x07
  31
  32 #define TCS4525_VSEL0           0x11
  33 #define TCS4525_VSEL1           0x10
  34 #define TCS4525_TIME            0x13
  35 #define TCS4525_COMMAND         0x14
  36
  37 /* Control register */
  38 #define FAN53555_CONTROL        0x02
  39 /* IC Type */
  40 #define FAN53555_ID1            0x03
  41 /* IC mask version */
  42 #define FAN53555_ID2            0x04
  43 /* Monitor register */
  44 #define FAN53555_MONITOR        0x05
  45
  46 /* VSEL bit definitions */
  47 #define VSEL_BUCK_EN            BIT(7)
  48 #define VSEL_MODE               BIT(6)
  49 /* Chip ID and Version */
  50 #define DIE_ID                  0x0F    /* ID1 */
  51 #define DIE_REV                 0x0F    /* ID2 */
  52 /* Control bit definitions */
  53 #define CTL_OUTPUT_DISCHG       BIT(7)
  54 #define CTL_SLEW_MASK           GENMASK(6, 4)
  55 #define CTL_RESET               BIT(2)
  56 #define CTL_MODE_VSEL0_MODE     BIT(0)
  57 #define CTL_MODE_VSEL1_MODE     BIT(1)
  58
  59 #define FAN53555_NVOLTAGES      64      /* Numbers of voltages */
  60 #define FAN53526_NVOLTAGES      128
  61 #define RK8602_NVOLTAGES        160
  62
  63 #define TCS_VSEL0_MODE          BIT(7)
  64 #define TCS_VSEL1_MODE          BIT(6)
  65
  66 #define TCS_SLEW_MASK           GENMASK(4, 3)
  67
  68 enum fan53555_vendor {
  69         FAN53526_VENDOR_FAIRCHILD = 0,
  70         FAN53555_VENDOR_FAIRCHILD,
  71         FAN53555_VENDOR_ROCKCHIP,       /* RK8600, RK8601 */
  72         RK8602_VENDOR_ROCKCHIP,         /* RK8602, RK8603 */
  73         FAN53555_VENDOR_SILERGY,
  74         FAN53526_VENDOR_TCS,
  75 };
  76
  77 enum {
  78         FAN53526_CHIP_ID_01 = 1,
  79 };
  80
  81 enum {
  82         FAN53526_CHIP_REV_08 = 8,
  83 };
  84
  85 /* IC Type */
  86 enum {
  87         FAN53555_CHIP_ID_00 = 0,
  88         FAN53555_CHIP_ID_01,
  89         FAN53555_CHIP_ID_02,
  90         FAN53555_CHIP_ID_03,
  91         FAN53555_CHIP_ID_04,
  92         FAN53555_CHIP_ID_05,
  93         FAN53555_CHIP_ID_08 = 8,
  94 };
  95
  96 enum {
  97         RK8600_CHIP_ID_08 = 8,          /* RK8600, RK8601 */
  98 };
  99
 100 enum {
 101         RK8602_CHIP_ID_10 = 10,         /* RK8602, RK8603 */
 102 };
 103
 104 enum {
 105         TCS4525_CHIP_ID_12 = 12,
 106 };
 107
 108 enum {
 109         TCS4526_CHIP_ID_00 = 0,
 110 };
 111
 112 /* IC mask revision */
 113 enum {
 114         FAN53555_CHIP_REV_00 = 0x3,
 115         FAN53555_CHIP_REV_13 = 0xf,
 116 };
 117
 118 enum {
 119         SILERGY_SYR82X = 8,
 120         SILERGY_SYR83X = 9,
 121 };
 122
 123 struct fan53555_device_info {
 124         enum fan53555_vendor vendor;
 125         struct device *dev;
 126         struct regulator_desc desc;
 127         struct regulator_init_data *regulator;
 128         /* IC Type and Rev */
 129         int chip_id;
 130         int chip_rev;
 131         /* Voltage setting register */
 132         unsigned int vol_reg;
 133         unsigned int sleep_reg;
 134         unsigned int en_reg;
 135         unsigned int sleep_en_reg;
 136         /* Voltage range and step(linear) */
 137         unsigned int vsel_min;
 138         unsigned int vsel_step;
 139         unsigned int vsel_count;
 140         /* Mode */
 141         unsigned int mode_reg;
 142         unsigned int mode_mask;
 143         /* Sleep voltage cache */
 144         unsigned int sleep_vol_cache;
 145         /* Slew rate */
 146         unsigned int slew_reg;
 147         unsigned int slew_mask;
 148         const unsigned int *ramp_delay_table;
 149         unsigned int n_ramp_values;
 150         unsigned int slew_rate;
 151 };
 152
 153 static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 154 {
 155         struct fan53555_device_info *di = rdev_get_drvdata(rdev);
 156         int ret;
 157
 158         if (di->sleep_vol_cache == uV)
 159                 return 0;
 160         ret = regulator_map_voltage_linear(rdev, uV, uV);
 161         if (ret < 0)
 162                 return ret;
 163         ret = regmap_update_bits(rdev->regmap, di->sleep_reg,
 164                                  di->desc.vsel_mask, ret);
 165         if (ret < 0)
 166                 return ret;
 167         /* Cache the sleep voltage setting.
 168          * Might not be the real voltage which is rounded */
 169         di->sleep_vol_cache = uV;
 170
 171         return 0;
 172 }
 173
 174 static int fan53555_set_suspend_enable(struct regulator_dev *rdev)
 175 {
 176         struct fan53555_device_info *di = rdev_get_drvdata(rdev);
 177
 178         return regmap_update_bits(rdev->regmap, di->sleep_en_reg,
 179                                   VSEL_BUCK_EN, VSEL_BUCK_EN);
 180 }
 181
 182 static int fan53555_set_suspend_disable(struct regulator_dev *rdev)
 183 {
 184         struct fan53555_device_info *di = rdev_get_drvdata(rdev);
 185
 186         return regmap_update_bits(rdev->regmap, di->sleep_en_reg,
 187                                   VSEL_BUCK_EN, 0);
 188 }
 189
 190 static int fan53555_set_mode(struct regulator_dev *rdev, unsigned int mode)
 191 {
 192         struct fan53555_device_info *di = rdev_get_drvdata(rdev);
 193
 194         switch (mode) {
 195         case REGULATOR_MODE_FAST:
 196                 regmap_update_bits(rdev->regmap, di->mode_reg,
 197                                    di->mode_mask, di->mode_mask);
 198                 break;
 199         case REGULATOR_MODE_NORMAL:
 200                 regmap_update_bits(rdev->regmap, di->vol_reg, di->mode_mask, 0);
 201                 break;
 202         default:
 203                 return -EINVAL;
 204         }
 205         return 0;
 206 }
 207
 208 static unsigned int fan53555_get_mode(struct regulator_dev *rdev)
 209 {
 210         struct fan53555_device_info *di = rdev_get_drvdata(rdev);
 211         unsigned int val;
 212         int ret = 0;
 213
 214         ret = regmap_read(rdev->regmap, di->mode_reg, &val);
 215         if (ret < 0)
 216                 return ret;
 217         if (val & di->mode_mask)
 218                 return REGULATOR_MODE_FAST;
 219         else
 220                 return REGULATOR_MODE_NORMAL;
 221 }
 222
 223 static const unsigned int slew_rates[] = {
 224         64000,
 225         32000,
 226         16000,
 227          8000,
 228          4000,
 229          2000,
 230          1000,
 231           500,
 232 };
 233
 234 static const unsigned int tcs_slew_rates[] = {
 235         18700,
 236          9300,
 237          4600,
 238          2300,
 239 };
 240
 241 static const struct regulator_ops fan53555_regulator_ops = {
 242         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 243         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 244         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 245         .map_voltage = regulator_map_voltage_linear,
 246         .list_voltage = regulator_list_voltage_linear,
 247         .set_suspend_voltage = fan53555_set_suspend_voltage,
 248         .enable = regulator_enable_regmap,
 249         .disable = regulator_disable_regmap,
 250         .is_enabled = regulator_is_enabled_regmap,
 251         .set_mode = fan53555_set_mode,
 252         .get_mode = fan53555_get_mode,
 253         .set_ramp_delay = regulator_set_ramp_delay_regmap,
 254         .set_suspend_enable = fan53555_set_suspend_enable,
 255         .set_suspend_disable = fan53555_set_suspend_disable,
 256 };
 257
 258 static int fan53526_voltages_setup_fairchild(struct fan53555_device_info *di)
 259 {
 260         /* Init voltage range and step */
 261         switch (di->chip_id) {
 262         case FAN53526_CHIP_ID_01:
 263                 switch (di->chip_rev) {
 264                 case FAN53526_CHIP_REV_08:
 265                         di->vsel_min = 600000;
 266                         di->vsel_step = 6250;
 267                         break;
 268                 default:
 269                         dev_err(di->dev,
 270                                 "Chip ID %d with rev %d not supported!\n",
 271                                 di->chip_id, di->chip_rev);
 272                         return -EINVAL;
 273                 }
 274                 break;
 275         default:
 276                 dev_err(di->dev,
 277                         "Chip ID %d not supported!\n", di->chip_id);
 278                 return -EINVAL;
 279         }
 280
 281         di->slew_reg = FAN53555_CONTROL;
 282         di->slew_mask = CTL_SLEW_MASK;
 283         di->ramp_delay_table = slew_rates;
 284         di->n_ramp_values = ARRAY_SIZE(slew_rates);
 285         di->vsel_count = FAN53526_NVOLTAGES;
 286
 287         return 0;
 288 }
 289
 290 static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
 291 {
 292         /* Init voltage range and step */
 293         switch (di->chip_id) {
 294         case FAN53555_CHIP_ID_00:
 295                 switch (di->chip_rev) {
 296                 case FAN53555_CHIP_REV_00:
 297                         di->vsel_min = 600000;
 298                         di->vsel_step = 10000;
 299                         break;
 300                 case FAN53555_CHIP_REV_13:
 301                         di->vsel_min = 800000;
 302                         di->vsel_step = 10000;
 303                         break;
 304                 default:
 305                         dev_err(di->dev,
 306                                 "Chip ID %d with rev %d not supported!\n",
 307                                 di->chip_id, di->chip_rev);
 308                         return -EINVAL;
 309                 }
 310                 break;
 311         case FAN53555_CHIP_ID_01:
 312         case FAN53555_CHIP_ID_03:
 313         case FAN53555_CHIP_ID_05:
 314         case FAN53555_CHIP_ID_08:
 315                 di->vsel_min = 600000;
 316                 di->vsel_step = 10000;
 317                 break;
 318         case FAN53555_CHIP_ID_04:
 319                 di->vsel_min = 603000;
 320                 di->vsel_step = 12826;
 321                 break;
 322         default:
 323                 dev_err(di->dev,
 324                         "Chip ID %d not supported!\n", di->chip_id);
 325                 return -EINVAL;
 326         }
 327         di->slew_reg = FAN53555_CONTROL;
 328         di->slew_mask = CTL_SLEW_MASK;
 329         di->ramp_delay_table = slew_rates;
 330         di->n_ramp_values = ARRAY_SIZE(slew_rates);
 331         di->vsel_count = FAN53555_NVOLTAGES;
 332
 333         return 0;
 334 }
 335
 336 static int fan53555_voltages_setup_rockchip(struct fan53555_device_info *di)
 337 {
 338         /* Init voltage range and step */
 339         switch (di->chip_id) {
 340         case RK8600_CHIP_ID_08:
 341                 di->vsel_min = 712500;
 342                 di->vsel_step = 12500;
 343                 break;
 344         default:
 345                 dev_err(di->dev,
 346                         "Chip ID %d not supported!\n", di->chip_id);
 347                 return -EINVAL;
 348         }
 349         di->slew_reg = FAN53555_CONTROL;
 350         di->slew_mask = CTL_SLEW_MASK;
 351         di->ramp_delay_table = slew_rates;
 352         di->n_ramp_values = ARRAY_SIZE(slew_rates);
 353         di->vsel_count = FAN53555_NVOLTAGES;
 354
 355         return 0;
 356 }
 357
 358 static int rk8602_voltages_setup_rockchip(struct fan53555_device_info *di)
 359 {
 360         /* Init voltage range and step */
 361         switch (di->chip_id) {
 362         case RK8602_CHIP_ID_10:
 363                 di->vsel_min = 500000;
 364                 di->vsel_step = 6250;
 365                 break;
 366         default:
 367                 dev_err(di->dev,
 368                         "Chip ID %d not supported!\n", di->chip_id);
 369                 return -EINVAL;
 370         }
 371         di->slew_reg = FAN53555_CONTROL;
 372         di->slew_mask = CTL_SLEW_MASK;
 373         di->ramp_delay_table = slew_rates;
 374         di->n_ramp_values = ARRAY_SIZE(slew_rates);
 375         di->vsel_count = RK8602_NVOLTAGES;
 376
 377         return 0;
 378 }
 379
 380 static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di)
 381 {
 382         /* Init voltage range and step */
 383         switch (di->chip_id) {
 384         case SILERGY_SYR82X:
 385         case SILERGY_SYR83X:
 386                 di->vsel_min = 712500;
 387                 di->vsel_step = 12500;
 388                 break;
 389         default:
 390                 dev_err(di->dev,
 391                         "Chip ID %d not supported!\n", di->chip_id);
 392                 return -EINVAL;
 393         }
 394         di->slew_reg = FAN53555_CONTROL;
 395         di->slew_mask = CTL_SLEW_MASK;
 396         di->ramp_delay_table = slew_rates;
 397         di->n_ramp_values = ARRAY_SIZE(slew_rates);
 398         di->vsel_count = FAN53555_NVOLTAGES;
 399
 400         return 0;
 401 }
 402
 403 static int fan53526_voltages_setup_tcs(struct fan53555_device_info *di)
 404 {
 405         switch (di->chip_id) {
 406         case TCS4525_CHIP_ID_12:
 407         case TCS4526_CHIP_ID_00:
 408                 di->slew_reg = TCS4525_TIME;
 409                 di->slew_mask = TCS_SLEW_MASK;
 410                 di->ramp_delay_table = tcs_slew_rates;
 411                 di->n_ramp_values = ARRAY_SIZE(tcs_slew_rates);
 412
 413                 /* Init voltage range and step */
 414                 di->vsel_min = 600000;
 415                 di->vsel_step = 6250;
 416                 di->vsel_count = FAN53526_NVOLTAGES;
 417                 break;
 418         default:
 419                 dev_err(di->dev, "Chip ID %d not supported!\n", di->chip_id);
 420                 return -EINVAL;
 421         }
 422
 423         return 0;
 424 }
 425
 426 /* For 00,01,03,05 options:
 427  * VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V.
 428  * For 04 option:
 429  * VOUT = 0.603V + NSELx * 12.826mV, from 0.603 to 1.411V.
 430  * */
 431 static int fan53555_device_setup(struct fan53555_device_info *di,
 432                                 struct fan53555_platform_data *pdata)
 433 {
 434         int ret = 0;
 435
 436         /* Setup voltage control register */
 437         switch (di->vendor) {
 438         case FAN53526_VENDOR_FAIRCHILD:
 439         case FAN53555_VENDOR_FAIRCHILD:
 440         case FAN53555_VENDOR_ROCKCHIP:
 441         case FAN53555_VENDOR_SILERGY:
 442                 switch (pdata->sleep_vsel_id) {
 443                 case FAN53555_VSEL_ID_0:
 444                         di->sleep_reg = FAN53555_VSEL0;
 445                         di->vol_reg = FAN53555_VSEL1;
 446                         break;
 447                 case FAN53555_VSEL_ID_1:
 448                         di->sleep_reg = FAN53555_VSEL1;
 449                         di->vol_reg = FAN53555_VSEL0;
 450                         break;
 451                 default:
 452                         dev_err(di->dev, "Invalid VSEL ID!\n");
 453                         return -EINVAL;
 454                 }
 455                 di->sleep_en_reg = di->sleep_reg;
 456                 di->en_reg = di->vol_reg;
 457                 break;
 458         case RK8602_VENDOR_ROCKCHIP:
 459                 switch (pdata->sleep_vsel_id) {
 460                 case FAN53555_VSEL_ID_0:
 461                         di->sleep_reg = RK8602_VSEL0;
 462                         di->vol_reg = RK8602_VSEL1;
 463                         di->sleep_en_reg = FAN53555_VSEL0;
 464                         di->en_reg = FAN53555_VSEL1;
 465                         break;
 466                 case FAN53555_VSEL_ID_1:
 467                         di->sleep_reg = RK8602_VSEL1;
 468                         di->vol_reg = RK8602_VSEL0;
 469                         di->sleep_en_reg = FAN53555_VSEL1;
 470                         di->en_reg = FAN53555_VSEL0;
 471                         break;
 472                 default:
 473                         dev_err(di->dev, "Invalid VSEL ID!\n");
 474                         return -EINVAL;
 475                 }
 476                 break;
 477         case FAN53526_VENDOR_TCS:
 478                 switch (pdata->sleep_vsel_id) {
 479                 case FAN53555_VSEL_ID_0:
 480                         di->sleep_reg = TCS4525_VSEL0;
 481                         di->vol_reg = TCS4525_VSEL1;
 482                         break;
 483                 case FAN53555_VSEL_ID_1:
 484                         di->sleep_reg = TCS4525_VSEL1;
 485                         di->vol_reg = TCS4525_VSEL0;
 486                         break;
 487                 default:
 488                         dev_err(di->dev, "Invalid VSEL ID!\n");
 489                         return -EINVAL;
 490                 }
 491                 di->sleep_en_reg = di->sleep_reg;
 492                 di->en_reg = di->vol_reg;
 493                 break;
 494         default:
 495                 dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
 496                 return -EINVAL;
 497         }
 498
 499         /* Setup mode control register */
 500         switch (di->vendor) {
 501         case FAN53526_VENDOR_FAIRCHILD:
 502                 di->mode_reg = FAN53555_CONTROL;
 503
 504                 switch (pdata->sleep_vsel_id) {
 505                 case FAN53555_VSEL_ID_0:
 506                         di->mode_mask = CTL_MODE_VSEL1_MODE;
 507                         break;
 508                 case FAN53555_VSEL_ID_1:
 509                         di->mode_mask = CTL_MODE_VSEL0_MODE;
 510                         break;
 511                 }
 512                 break;
 513         case FAN53555_VENDOR_FAIRCHILD:
 514         case FAN53555_VENDOR_ROCKCHIP:
 515         case FAN53555_VENDOR_SILERGY:
 516                 di->mode_reg = di->vol_reg;
 517                 di->mode_mask = VSEL_MODE;
 518                 break;
 519         case RK8602_VENDOR_ROCKCHIP:
 520                 di->mode_mask = VSEL_MODE;
 521
 522                 switch (pdata->sleep_vsel_id) {
 523                 case FAN53555_VSEL_ID_0:
 524                         di->mode_reg = FAN53555_VSEL1;
 525                         break;
 526                 case FAN53555_VSEL_ID_1:
 527                         di->mode_reg = FAN53555_VSEL0;
 528                         break;
 529                 }
 530                 break;
 531         case FAN53526_VENDOR_TCS:
 532                 di->mode_reg = TCS4525_COMMAND;
 533
 534                 switch (pdata->sleep_vsel_id) {
 535                 case FAN53555_VSEL_ID_0:
 536                         di->mode_mask = TCS_VSEL1_MODE;
 537                         break;
 538                 case FAN53555_VSEL_ID_1:
 539                         di->mode_mask = TCS_VSEL0_MODE;
 540                         break;
 541                 }
 542                 break;
 543         default:
 544                 dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
 545                 return -EINVAL;
 546         }
 547
 548         /* Setup voltage range */
 549         switch (di->vendor) {
 550         case FAN53526_VENDOR_FAIRCHILD:
 551                 ret = fan53526_voltages_setup_fairchild(di);
 552                 break;
 553         case FAN53555_VENDOR_FAIRCHILD:
 554                 ret = fan53555_voltages_setup_fairchild(di);
 555                 break;
 556         case FAN53555_VENDOR_ROCKCHIP:
 557                 ret = fan53555_voltages_setup_rockchip(di);
 558                 break;
 559         case RK8602_VENDOR_ROCKCHIP:
 560                 ret = rk8602_voltages_setup_rockchip(di);
 561                 break;
 562         case FAN53555_VENDOR_SILERGY:
 563                 ret = fan53555_voltages_setup_silergy(di);
 564                 break;
 565         case FAN53526_VENDOR_TCS:
 566                 ret = fan53526_voltages_setup_tcs(di);
 567                 break;
 568         default:
 569                 dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
 570                 return -EINVAL;
 571         }
 572
 573         return ret;
 574 }
 575
 576 static int fan53555_regulator_register(struct fan53555_device_info *di,
 577                         struct regulator_config *config)
 578 {
 579         struct regulator_desc *rdesc = &di->desc;
 580         struct regulator_dev *rdev;
 581
 582         rdesc->name = "fan53555-reg";
 583         rdesc->supply_name = "vin";
 584         rdesc->ops = &fan53555_regulator_ops;
 585         rdesc->type = REGULATOR_VOLTAGE;
 586         rdesc->n_voltages = di->vsel_count;
 587         rdesc->enable_reg = di->en_reg;
 588         rdesc->enable_mask = VSEL_BUCK_EN;
 589         rdesc->min_uV = di->vsel_min;
 590         rdesc->uV_step = di->vsel_step;
 591         rdesc->vsel_reg = di->vol_reg;
 592         rdesc->vsel_mask = BIT(fls(di->vsel_count - 1)) - 1;
 593         rdesc->ramp_reg = di->slew_reg;
 594         rdesc->ramp_mask = di->slew_mask;
 595         rdesc->ramp_delay_table = di->ramp_delay_table;
 596         rdesc->n_ramp_values = di->n_ramp_values;
 597         rdesc->owner = THIS_MODULE;
 598
 599         rdev = devm_regulator_register(di->dev, &di->desc, config);
 600         return PTR_ERR_OR_ZERO(rdev);
 601 }
 602
 603 static const struct regmap_config fan53555_regmap_config = {
 604         .reg_bits = 8,
 605         .val_bits = 8,
 606 };
 607
 608 static struct fan53555_platform_data *fan53555_parse_dt(struct device *dev,
 609                                               struct device_node *np,
 610                                               const struct regulator_desc *desc)
 611 {
 612         struct fan53555_platform_data *pdata;
 613         int ret;
 614         u32 tmp;
 615
 616         pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 617         if (!pdata)
 618                 return NULL;
 619
 620         pdata->regulator = of_get_regulator_init_data(dev, np, desc);
 621
 622         ret = of_property_read_u32(np, "fcs,suspend-voltage-selector",
 623                                    &tmp);
 624         if (!ret)
 625                 pdata->sleep_vsel_id = tmp;
 626
 627         return pdata;
 628 }
 629
 630 static const struct of_device_id __maybe_unused fan53555_dt_ids[] = {
 631         {
 632                 .compatible = "fcs,fan53526",
 633                 .data = (void *)FAN53526_VENDOR_FAIRCHILD,
 634         }, {
 635                 .compatible = "fcs,fan53555",
 636                 .data = (void *)FAN53555_VENDOR_FAIRCHILD
 637         }, {
 638                 .compatible = "rockchip,rk8600",
 639                 .data = (void *)FAN53555_VENDOR_ROCKCHIP
 640         }, {
 641                 .compatible = "rockchip,rk8602",
 642                 .data = (void *)RK8602_VENDOR_ROCKCHIP
 643         }, {
 644                 .compatible = "silergy,syr827",
 645                 .data = (void *)FAN53555_VENDOR_SILERGY,
 646         }, {
 647                 .compatible = "silergy,syr828",
 648                 .data = (void *)FAN53555_VENDOR_SILERGY,
 649         }, {
 650                 .compatible = "tcs,tcs4525",
 651                 .data = (void *)FAN53526_VENDOR_TCS
 652         }, {
 653                 .compatible = "tcs,tcs4526",
 654                 .data = (void *)FAN53526_VENDOR_TCS
 655         },
 656         { }
 657 };
 658 MODULE_DEVICE_TABLE(of, fan53555_dt_ids);
 659
 660 static int fan53555_regulator_probe(struct i2c_client *client)
 661 {
 662         struct device_node *np = client->dev.of_node;
 663         struct fan53555_device_info *di;
 664         struct fan53555_platform_data *pdata;
 665         struct regulator_config config = { };
 666         struct regmap *regmap;
 667         unsigned int val;
 668         int ret;
 669
 670         di = devm_kzalloc(&client->dev, sizeof(struct fan53555_device_info),
 671                                         GFP_KERNEL);
 672         if (!di)
 673                 return -ENOMEM;
 674
 675         pdata = dev_get_platdata(&client->dev);
 676         if (!pdata)
 677                 pdata = fan53555_parse_dt(&client->dev, np, &di->desc);
 678
 679         if (!pdata || !pdata->regulator)
 680                 return dev_err_probe(&client->dev, -ENODEV,
 681                                      "Platform data not found!\n");
 682
 683         di->regulator = pdata->regulator;
 684         di->vendor = (uintptr_t)i2c_get_match_data(client);
 685         if (!dev_fwnode(&client->dev)) {
 686                 /* if no ramp constraint set, get the pdata ramp_delay */
 687                 if (!di->regulator->constraints.ramp_delay) {
 688                         if (pdata->slew_rate >= ARRAY_SIZE(slew_rates))
 689                                 return dev_err_probe(&client->dev, -EINVAL,
 690                                                      "Invalid slew_rate\n");
 691
 692                         di->regulator->constraints.ramp_delay
 693                                         = slew_rates[pdata->slew_rate];
 694                 }
 695         }
 696
 697         regmap = devm_regmap_init_i2c(client, &fan53555_regmap_config);
 698         if (IS_ERR(regmap))
 699                 return dev_err_probe(&client->dev, PTR_ERR(regmap),
 700                                      "Failed to allocate regmap!\n");
 701
 702         di->dev = &client->dev;
 703         i2c_set_clientdata(client, di);
 704         /* Get chip ID */
 705         ret = regmap_read(regmap, FAN53555_ID1, &val);
 706         if (ret < 0)
 707                 return dev_err_probe(&client->dev, ret, "Failed to get chip ID!\n");
 708
 709         di->chip_id = val & DIE_ID;
 710         /* Get chip revision */
 711         ret = regmap_read(regmap, FAN53555_ID2, &val);
 712         if (ret < 0)
 713                 return dev_err_probe(&client->dev, ret, "Failed to get chip Rev!\n");
 714
 715         di->chip_rev = val & DIE_REV;
 716         dev_info(&client->dev, "FAN53555 Option[%d] Rev[%d] Detected!\n",
 717                                 di->chip_id, di->chip_rev);
 718         /* Device init */
 719         ret = fan53555_device_setup(di, pdata);
 720         if (ret < 0)
 721                 return dev_err_probe(&client->dev, ret, "Failed to setup device!\n");
 722
 723         /* Register regulator */
 724         config.dev = di->dev;
 725         config.init_data = di->regulator;
 726         config.regmap = regmap;
 727         config.driver_data = di;
 728         config.of_node = np;
 729
 730         ret = fan53555_regulator_register(di, &config);
 731         if (ret < 0)
 732                 dev_err_probe(&client->dev, ret, "Failed to register regulator!\n");
 733
 734         return ret;
 735 }
 736
 737 static const struct i2c_device_id fan53555_id[] = {
 738         {
 739                 .name = "fan53526",
 740                 .driver_data = FAN53526_VENDOR_FAIRCHILD
 741         }, {
 742                 .name = "fan53555",
 743                 .driver_data = FAN53555_VENDOR_FAIRCHILD
 744         }, {
 745                 .name = "rk8600",
 746                 .driver_data = FAN53555_VENDOR_ROCKCHIP
 747         }, {
 748                 .name = "rk8602",
 749                 .driver_data = RK8602_VENDOR_ROCKCHIP
 750         }, {
 751                 .name = "syr827",
 752                 .driver_data = FAN53555_VENDOR_SILERGY
 753         }, {
 754                 .name = "syr828",
 755                 .driver_data = FAN53555_VENDOR_SILERGY
 756         }, {
 757                 .name = "tcs4525",
 758                 .driver_data = FAN53526_VENDOR_TCS
 759         }, {
 760                 .name = "tcs4526",
 761                 .driver_data = FAN53526_VENDOR_TCS
 762         },
 763         { },
 764 };
 765 MODULE_DEVICE_TABLE(i2c, fan53555_id);
 766
 767 static struct i2c_driver fan53555_regulator_driver = {
 768         .driver = {
 769                 .name = "fan53555-regulator",
 770                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 771                 .of_match_table = of_match_ptr(fan53555_dt_ids),
 772         },
 773         .probe = fan53555_regulator_probe,
 774         .id_table = fan53555_id,
 775 };
 776
 777 module_i2c_driver(fan53555_regulator_driver);
 778
 779 MODULE_AUTHOR("Yunfan Zhang <yfzhang@marvell.com>");
 780 MODULE_DESCRIPTION("FAN53555 regulator driver");
 781 MODULE_LICENSE("GPL v2");