drivers/regulator/max77620-regulator.c

   1 /*
   2  * Maxim MAX77620 Regulator driver
   3  *
   4  * Copyright (c) 2016, NVIDIA CORPORATION.  All rights reserved.
   5  *
   6  * Author: Mallikarjun Kasoju <mkasoju@nvidia.com>
   7  *      Laxman Dewangan <ldewangan@nvidia.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms and conditions of the GNU General Public License,
  11  * version 2, as published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/init.h>
  15 #include <linux/mfd/max77620.h>
  16 #include <linux/module.h>
  17 #include <linux/of.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/regmap.h>
  20 #include <linux/regulator/driver.h>
  21 #include <linux/regulator/machine.h>
  22 #include <linux/regulator/of_regulator.h>
  23
  24 #define max77620_rails(_name)   "max77620-"#_name
  25
  26 /* Power Mode */
  27 #define MAX77620_POWER_MODE_NORMAL              3
  28 #define MAX77620_POWER_MODE_LPM                 2
  29 #define MAX77620_POWER_MODE_GLPM                1
  30 #define MAX77620_POWER_MODE_DISABLE             0
  31
  32 /* SD Slew Rate */
  33 #define MAX77620_SD_SR_13_75                    0
  34 #define MAX77620_SD_SR_27_5                     1
  35 #define MAX77620_SD_SR_55                       2
  36 #define MAX77620_SD_SR_100                      3
  37
  38 enum max77620_regulators {
  39         MAX77620_REGULATOR_ID_SD0,
  40         MAX77620_REGULATOR_ID_SD1,
  41         MAX77620_REGULATOR_ID_SD2,
  42         MAX77620_REGULATOR_ID_SD3,
  43         MAX77620_REGULATOR_ID_SD4,
  44         MAX77620_REGULATOR_ID_LDO0,
  45         MAX77620_REGULATOR_ID_LDO1,
  46         MAX77620_REGULATOR_ID_LDO2,
  47         MAX77620_REGULATOR_ID_LDO3,
  48         MAX77620_REGULATOR_ID_LDO4,
  49         MAX77620_REGULATOR_ID_LDO5,
  50         MAX77620_REGULATOR_ID_LDO6,
  51         MAX77620_REGULATOR_ID_LDO7,
  52         MAX77620_REGULATOR_ID_LDO8,
  53         MAX77620_NUM_REGS,
  54 };
  55
  56 /* Regulator types */
  57 enum max77620_regulator_type {
  58         MAX77620_REGULATOR_TYPE_SD,
  59         MAX77620_REGULATOR_TYPE_LDO_N,
  60         MAX77620_REGULATOR_TYPE_LDO_P,
  61 };
  62
  63 struct max77620_regulator_info {
  64         u8 type;
  65         u8 fps_addr;
  66         u8 volt_addr;
  67         u8 cfg_addr;
  68         u8 power_mode_mask;
  69         u8 power_mode_shift;
  70         u8 remote_sense_addr;
  71         u8 remote_sense_mask;
  72         struct regulator_desc desc;
  73 };
  74
  75 struct max77620_regulator_pdata {
  76         struct regulator_init_data *reg_idata;
  77         int active_fps_src;
  78         int active_fps_pd_slot;
  79         int active_fps_pu_slot;
  80         int suspend_fps_src;
  81         int suspend_fps_pd_slot;
  82         int suspend_fps_pu_slot;
  83         int current_mode;
  84 };
  85
  86 struct max77620_regulator {
  87         struct device *dev;
  88         struct regmap *rmap;
  89         struct max77620_regulator_info *rinfo[MAX77620_NUM_REGS];
  90         struct max77620_regulator_pdata reg_pdata[MAX77620_NUM_REGS];
  91         int enable_power_mode[MAX77620_NUM_REGS];
  92         int current_power_mode[MAX77620_NUM_REGS];
  93         int active_fps_src[MAX77620_NUM_REGS];
  94 };
  95
  96 #define fps_src_name(fps_src)   \
  97         (fps_src == MAX77620_FPS_SRC_0 ? "FPS_SRC_0" :  \
  98         fps_src == MAX77620_FPS_SRC_1 ? "FPS_SRC_1" :   \
  99         fps_src == MAX77620_FPS_SRC_2 ? "FPS_SRC_2" : "FPS_SRC_NONE")
 100
 101 static int max77620_regulator_get_fps_src(struct max77620_regulator *pmic,
 102                                           int id)
 103 {
 104         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 105         unsigned int val;
 106         int ret;
 107
 108         ret = regmap_read(pmic->rmap, rinfo->fps_addr, &val);
 109         if (ret < 0) {
 110                 dev_err(pmic->dev, "Reg 0x%02x read failed %d\n",
 111                         rinfo->fps_addr, ret);
 112                 return ret;
 113         }
 114
 115         return (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;
 116 }
 117
 118 static int max77620_regulator_set_fps_src(struct max77620_regulator *pmic,
 119                                           int fps_src, int id)
 120 {
 121         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 122         unsigned int val;
 123         int ret;
 124
 125         switch (fps_src) {
 126         case MAX77620_FPS_SRC_0:
 127         case MAX77620_FPS_SRC_1:
 128         case MAX77620_FPS_SRC_2:
 129         case MAX77620_FPS_SRC_NONE:
 130                 break;
 131
 132         case MAX77620_FPS_SRC_DEF:
 133                 ret = regmap_read(pmic->rmap, rinfo->fps_addr, &val);
 134                 if (ret < 0) {
 135                         dev_err(pmic->dev, "Reg 0x%02x read failed %d\n",
 136                                 rinfo->fps_addr, ret);
 137                         return ret;
 138                 }
 139                 ret = (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;
 140                 pmic->active_fps_src[id] = ret;
 141                 return 0;
 142
 143         default:
 144                 dev_err(pmic->dev, "Invalid FPS %d for regulator %d\n",
 145                         fps_src, id);
 146                 return -EINVAL;
 147         }
 148
 149         ret = regmap_update_bits(pmic->rmap, rinfo->fps_addr,
 150                                  MAX77620_FPS_SRC_MASK,
 151                                  fps_src << MAX77620_FPS_SRC_SHIFT);
 152         if (ret < 0) {
 153                 dev_err(pmic->dev, "Reg 0x%02x update failed %d\n",
 154                         rinfo->fps_addr, ret);
 155                 return ret;
 156         }
 157         pmic->active_fps_src[id] = fps_src;
 158
 159         return 0;
 160 }
 161
 162 static int max77620_regulator_set_fps_slots(struct max77620_regulator *pmic,
 163                                             int id, bool is_suspend)
 164 {
 165         struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
 166         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 167         unsigned int val = 0;
 168         unsigned int mask = 0;
 169         int pu = rpdata->active_fps_pu_slot;
 170         int pd = rpdata->active_fps_pd_slot;
 171         int ret = 0;
 172
 173         if (is_suspend) {
 174                 pu = rpdata->suspend_fps_pu_slot;
 175                 pd = rpdata->suspend_fps_pd_slot;
 176         }
 177
 178         /* FPS power up period setting */
 179         if (pu >= 0) {
 180                 val |= (pu << MAX77620_FPS_PU_PERIOD_SHIFT);
 181                 mask |= MAX77620_FPS_PU_PERIOD_MASK;
 182         }
 183
 184         /* FPS power down period setting */
 185         if (pd >= 0) {
 186                 val |= (pd << MAX77620_FPS_PD_PERIOD_SHIFT);
 187                 mask |= MAX77620_FPS_PD_PERIOD_MASK;
 188         }
 189
 190         if (mask) {
 191                 ret = regmap_update_bits(pmic->rmap, rinfo->fps_addr,
 192                                          mask, val);
 193                 if (ret < 0) {
 194                         dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
 195                                 rinfo->fps_addr, ret);
 196                         return ret;
 197                 }
 198         }
 199
 200         return ret;
 201 }
 202
 203 static int max77620_regulator_set_power_mode(struct max77620_regulator *pmic,
 204                                              int power_mode, int id)
 205 {
 206         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 207         u8 mask = rinfo->power_mode_mask;
 208         u8 shift = rinfo->power_mode_shift;
 209         u8 addr;
 210         int ret;
 211
 212         switch (rinfo->type) {
 213         case MAX77620_REGULATOR_TYPE_SD:
 214                 addr = rinfo->cfg_addr;
 215                 break;
 216         default:
 217                 addr = rinfo->volt_addr;
 218                 break;
 219         }
 220
 221         ret = regmap_update_bits(pmic->rmap, addr, mask, power_mode << shift);
 222         if (ret < 0) {
 223                 dev_err(pmic->dev, "Regulator %d mode set failed: %d\n",
 224                         id, ret);
 225                 return ret;
 226         }
 227         pmic->current_power_mode[id] = power_mode;
 228
 229         return ret;
 230 }
 231
 232 static int max77620_regulator_get_power_mode(struct max77620_regulator *pmic,
 233                                              int id)
 234 {
 235         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 236         unsigned int val, addr;
 237         u8 mask = rinfo->power_mode_mask;
 238         u8 shift = rinfo->power_mode_shift;
 239         int ret;
 240
 241         switch (rinfo->type) {
 242         case MAX77620_REGULATOR_TYPE_SD:
 243                 addr = rinfo->cfg_addr;
 244                 break;
 245         default:
 246                 addr = rinfo->volt_addr;
 247                 break;
 248         }
 249
 250         ret = regmap_read(pmic->rmap, addr, &val);
 251         if (ret < 0) {
 252                 dev_err(pmic->dev, "Regulator %d: Reg 0x%02x read failed: %d\n",
 253                         id, addr, ret);
 254                 return ret;
 255         }
 256
 257         return (val & mask) >> shift;
 258 }
 259
 260 static int max77620_read_slew_rate(struct max77620_regulator *pmic, int id)
 261 {
 262         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 263         unsigned int rval;
 264         int slew_rate;
 265         int ret;
 266
 267         ret = regmap_read(pmic->rmap, rinfo->cfg_addr, &rval);
 268         if (ret < 0) {
 269                 dev_err(pmic->dev, "Register 0x%02x read failed: %d\n",
 270                         rinfo->cfg_addr, ret);
 271                 return ret;
 272         }
 273
 274         switch (rinfo->type) {
 275         case MAX77620_REGULATOR_TYPE_SD:
 276                 slew_rate = (rval >> MAX77620_SD_SR_SHIFT) & 0x3;
 277                 switch (slew_rate) {
 278                 case 0:
 279                         slew_rate = 13750;
 280                         break;
 281                 case 1:
 282                         slew_rate = 27500;
 283                         break;
 284                 case 2:
 285                         slew_rate = 55000;
 286                         break;
 287                 case 3:
 288                         slew_rate = 100000;
 289                         break;
 290                 }
 291                 rinfo->desc.ramp_delay = slew_rate;
 292                 break;
 293         default:
 294                 slew_rate = rval & 0x1;
 295                 switch (slew_rate) {
 296                 case 0:
 297                         slew_rate = 100000;
 298                         break;
 299                 case 1:
 300                         slew_rate = 5000;
 301                         break;
 302                 }
 303                 rinfo->desc.ramp_delay = slew_rate;
 304                 break;
 305         }
 306
 307         return 0;
 308 }
 309
 310 static int max77620_init_pmic(struct max77620_regulator *pmic, int id)
 311 {
 312         struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
 313         int ret;
 314
 315         /* Update power mode */
 316         ret = max77620_regulator_get_power_mode(pmic, id);
 317         if (ret < 0)
 318                 return ret;
 319
 320         pmic->current_power_mode[id] = ret;
 321         pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
 322
 323         if (rpdata->active_fps_src == MAX77620_FPS_SRC_DEF) {
 324                 ret = max77620_regulator_get_fps_src(pmic, id);
 325                 if (ret < 0)
 326                         return ret;
 327                 rpdata->active_fps_src = ret;
 328         }
 329
 330          /* If rails are externally control of FPS then enable it always. */
 331         if (rpdata->active_fps_src == MAX77620_FPS_SRC_NONE) {
 332                 ret = max77620_regulator_set_power_mode(pmic,
 333                                         pmic->enable_power_mode[id], id);
 334                 if (ret < 0)
 335                         return ret;
 336         } else {
 337                 if (pmic->current_power_mode[id] !=
 338                      pmic->enable_power_mode[id]) {
 339                         ret = max77620_regulator_set_power_mode(pmic,
 340                                         pmic->enable_power_mode[id], id);
 341                         if (ret < 0)
 342                                 return ret;
 343                 }
 344         }
 345
 346         ret = max77620_regulator_set_fps_src(pmic, rpdata->active_fps_src, id);
 347         if (ret < 0)
 348                 return ret;
 349
 350         ret = max77620_regulator_set_fps_slots(pmic, id, false);
 351         if (ret < 0)
 352                 return ret;
 353
 354         return 0;
 355 }
 356
 357 static int max77620_regulator_enable(struct regulator_dev *rdev)
 358 {
 359         struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 360         int id = rdev_get_id(rdev);
 361
 362         if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
 363                 return 0;
 364
 365         return max77620_regulator_set_power_mode(pmic,
 366                         pmic->enable_power_mode[id], id);
 367 }
 368
 369 static int max77620_regulator_disable(struct regulator_dev *rdev)
 370 {
 371         struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 372         int id = rdev_get_id(rdev);
 373
 374         if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
 375                 return 0;
 376
 377         return max77620_regulator_set_power_mode(pmic,
 378                         MAX77620_POWER_MODE_DISABLE, id);
 379 }
 380
 381 static int max77620_regulator_is_enabled(struct regulator_dev *rdev)
 382 {
 383         struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 384         int id = rdev_get_id(rdev);
 385         int ret = 1;
 386
 387         if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
 388                 return 1;
 389
 390         ret = max77620_regulator_get_power_mode(pmic, id);
 391         if (ret < 0)
 392                 return ret;
 393
 394         if (ret != MAX77620_POWER_MODE_DISABLE)
 395                 return 1;
 396
 397         return 0;
 398 }
 399
 400 static int max77620_regulator_set_mode(struct regulator_dev *rdev,
 401                                        unsigned int mode)
 402 {
 403         struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 404         int id = rdev_get_id(rdev);
 405         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 406         struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
 407         bool fpwm = false;
 408         int power_mode;
 409         int ret;
 410         u8 val;
 411
 412         switch (mode) {
 413         case REGULATOR_MODE_FAST:
 414                 fpwm = true;
 415                 power_mode = MAX77620_POWER_MODE_NORMAL;
 416                 break;
 417
 418         case REGULATOR_MODE_NORMAL:
 419                 power_mode = MAX77620_POWER_MODE_NORMAL;
 420                 break;
 421
 422         case REGULATOR_MODE_IDLE:
 423                 power_mode = MAX77620_POWER_MODE_LPM;
 424                 break;
 425
 426         default:
 427                 dev_err(pmic->dev, "Regulator %d mode %d is invalid\n",
 428                         id, mode);
 429                 return -EINVAL;
 430         }
 431
 432         if (rinfo->type != MAX77620_REGULATOR_TYPE_SD)
 433                 goto skip_fpwm;
 434
 435         val = (fpwm) ? MAX77620_SD_FPWM_MASK : 0;
 436         ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr,
 437                                  MAX77620_SD_FPWM_MASK, val);
 438         if (ret < 0) {
 439                 dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
 440                         rinfo->cfg_addr, ret);
 441                 return ret;
 442         }
 443         rpdata->current_mode = mode;
 444
 445 skip_fpwm:
 446         ret = max77620_regulator_set_power_mode(pmic, power_mode, id);
 447         if (ret < 0)
 448                 return ret;
 449
 450         pmic->enable_power_mode[id] = power_mode;
 451
 452         return 0;
 453 }
 454
 455 static unsigned int max77620_regulator_get_mode(struct regulator_dev *rdev)
 456 {
 457         struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 458         int id = rdev_get_id(rdev);
 459         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 460         int fpwm = 0;
 461         int ret;
 462         int pm_mode, reg_mode;
 463         unsigned int val;
 464
 465         ret = max77620_regulator_get_power_mode(pmic, id);
 466         if (ret < 0)
 467                 return 0;
 468
 469         pm_mode = ret;
 470
 471         if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
 472                 ret = regmap_read(pmic->rmap, rinfo->cfg_addr, &val);
 473                 if (ret < 0) {
 474                         dev_err(pmic->dev, "Reg 0x%02x read failed: %d\n",
 475                                 rinfo->cfg_addr, ret);
 476                         return ret;
 477                 }
 478                 fpwm = !!(val & MAX77620_SD_FPWM_MASK);
 479         }
 480
 481         switch (pm_mode) {
 482         case MAX77620_POWER_MODE_NORMAL:
 483         case MAX77620_POWER_MODE_DISABLE:
 484                 if (fpwm)
 485                         reg_mode = REGULATOR_MODE_FAST;
 486                 else
 487                         reg_mode = REGULATOR_MODE_NORMAL;
 488                 break;
 489         case MAX77620_POWER_MODE_LPM:
 490         case MAX77620_POWER_MODE_GLPM:
 491                 reg_mode = REGULATOR_MODE_IDLE;
 492                 break;
 493         default:
 494                 return 0;
 495         }
 496
 497         return reg_mode;
 498 }
 499
 500 static int max77620_regulator_set_ramp_delay(struct regulator_dev *rdev,
 501                                              int ramp_delay)
 502 {
 503         struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 504         int id = rdev_get_id(rdev);
 505         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 506         int ret, val;
 507         u8 mask;
 508
 509         if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
 510                 if (ramp_delay <= 13750)
 511                         val = 0;
 512                 else if (ramp_delay <= 27500)
 513                         val = 1;
 514                 else if (ramp_delay <= 55000)
 515                         val = 2;
 516                 else
 517                         val = 3;
 518                 val <<= MAX77620_SD_SR_SHIFT;
 519                 mask = MAX77620_SD_SR_MASK;
 520         } else {
 521                 if (ramp_delay <= 5000)
 522                         val = 1;
 523                 else
 524                         val = 0;
 525                 mask = MAX77620_LDO_SLEW_RATE_MASK;
 526         }
 527
 528         ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr, mask, val);
 529         if (ret < 0)
 530                 dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
 531                         rinfo->cfg_addr, ret);
 532
 533         return ret;
 534 }
 535
 536 static int max77620_of_parse_cb(struct device_node *np,
 537                                 const struct regulator_desc *desc,
 538                                 struct regulator_config *config)
 539 {
 540         struct max77620_regulator *pmic = config->driver_data;
 541         struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[desc->id];
 542         u32 pval;
 543         int ret;
 544
 545         ret = of_property_read_u32(np, "maxim,active-fps-source", &pval);
 546         rpdata->active_fps_src = (!ret) ? pval : MAX77620_FPS_SRC_DEF;
 547
 548         ret = of_property_read_u32(np, "maxim,active-fps-power-up-slot", &pval);
 549         rpdata->active_fps_pu_slot = (!ret) ? pval : -1;
 550
 551         ret = of_property_read_u32(
 552                         np, "maxim,active-fps-power-down-slot", &pval);
 553         rpdata->active_fps_pd_slot = (!ret) ? pval : -1;
 554
 555         ret = of_property_read_u32(np, "maxim,suspend-fps-source", &pval);
 556         rpdata->suspend_fps_src = (!ret) ? pval : -1;
 557
 558         ret = of_property_read_u32(
 559                         np, "maxim,suspend-fps-power-up-slot", &pval);
 560         rpdata->suspend_fps_pu_slot = (!ret) ? pval : -1;
 561
 562         ret = of_property_read_u32(
 563                         np, "maxim,suspend-fps-power-down-slot", &pval);
 564         rpdata->suspend_fps_pd_slot = (!ret) ? pval : -1;
 565
 566         return max77620_init_pmic(pmic, desc->id);
 567 }
 568
 569 static struct regulator_ops max77620_regulator_ops = {
 570         .is_enabled = max77620_regulator_is_enabled,
 571         .enable = max77620_regulator_enable,
 572         .disable = max77620_regulator_disable,
 573         .list_voltage = regulator_list_voltage_linear,
 574         .map_voltage = regulator_map_voltage_linear,
 575         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 576         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 577         .set_mode = max77620_regulator_set_mode,
 578         .get_mode = max77620_regulator_get_mode,
 579         .set_ramp_delay = max77620_regulator_set_ramp_delay,
 580         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 581         .set_active_discharge = regulator_set_active_discharge_regmap,
 582 };
 583
 584 #define MAX77620_SD_CNF2_ROVS_EN_NONE   0
 585 #define RAIL_SD(_id, _name, _sname, _volt_mask, _min_uV, _max_uV,       \
 586                 _step_uV, _rs_add, _rs_mask)                            \
 587         [MAX77620_REGULATOR_ID_##_id] = {                               \
 588                 .type = MAX77620_REGULATOR_TYPE_SD,                     \
 589                 .volt_addr = MAX77620_REG_##_id,                        \
 590                 .cfg_addr = MAX77620_REG_##_id##_CFG,                   \
 591                 .fps_addr = MAX77620_REG_FPS_##_id,                     \
 592                 .remote_sense_addr = _rs_add,                           \
 593                 .remote_sense_mask = MAX77620_SD_CNF2_ROVS_EN_##_rs_mask, \
 594                 .power_mode_mask = MAX77620_SD_POWER_MODE_MASK,         \
 595                 .power_mode_shift = MAX77620_SD_POWER_MODE_SHIFT,       \
 596                 .desc = {                                               \
 597                         .name = max77620_rails(_name),                  \
 598                         .of_match = of_match_ptr(#_name),               \
 599                         .regulators_node = of_match_ptr("regulators"),  \
 600                         .of_parse_cb = max77620_of_parse_cb,            \
 601                         .supply_name = _sname,                          \
 602                         .id = MAX77620_REGULATOR_ID_##_id,              \
 603                         .ops = &max77620_regulator_ops,                 \
 604                         .n_voltages = ((_max_uV - _min_uV) / _step_uV) + 1, \
 605                         .min_uV = _min_uV,                              \
 606                         .uV_step = _step_uV,                            \
 607                         .enable_time = 500,                             \
 608                         .vsel_mask = MAX77620_##_volt_mask##_VOLT_MASK, \
 609                         .vsel_reg = MAX77620_REG_##_id,                 \
 610                         .active_discharge_off = 0,                      \
 611                         .active_discharge_on = MAX77620_SD_CFG1_ADE_ENABLE, \
 612                         .active_discharge_mask = MAX77620_SD_CFG1_ADE_MASK, \
 613                         .active_discharge_reg = MAX77620_REG_##_id##_CFG, \
 614                         .type = REGULATOR_VOLTAGE,                      \
 615                 },                                                      \
 616         }
 617
 618 #define RAIL_LDO(_id, _name, _sname, _type, _min_uV, _max_uV, _step_uV) \
 619         [MAX77620_REGULATOR_ID_##_id] = {                               \
 620                 .type = MAX77620_REGULATOR_TYPE_LDO_##_type,            \
 621                 .volt_addr = MAX77620_REG_##_id##_CFG,                  \
 622                 .cfg_addr = MAX77620_REG_##_id##_CFG2,                  \
 623                 .fps_addr = MAX77620_REG_FPS_##_id,                     \
 624                 .remote_sense_addr = 0xFF,                              \
 625                 .power_mode_mask = MAX77620_LDO_POWER_MODE_MASK,        \
 626                 .power_mode_shift = MAX77620_LDO_POWER_MODE_SHIFT,      \
 627                 .desc = {                                               \
 628                         .name = max77620_rails(_name),                  \
 629                         .of_match = of_match_ptr(#_name),               \
 630                         .regulators_node = of_match_ptr("regulators"),  \
 631                         .of_parse_cb = max77620_of_parse_cb,            \
 632                         .supply_name = _sname,                          \
 633                         .id = MAX77620_REGULATOR_ID_##_id,              \
 634                         .ops = &max77620_regulator_ops,                 \
 635                         .n_voltages = ((_max_uV - _min_uV) / _step_uV) + 1, \
 636                         .min_uV = _min_uV,                              \
 637                         .uV_step = _step_uV,                            \
 638                         .enable_time = 500,                             \
 639                         .vsel_mask = MAX77620_LDO_VOLT_MASK,            \
 640                         .vsel_reg = MAX77620_REG_##_id##_CFG,           \
 641                         .active_discharge_off = 0,                      \
 642                         .active_discharge_on = MAX77620_LDO_CFG2_ADE_ENABLE, \
 643                         .active_discharge_mask = MAX77620_LDO_CFG2_ADE_MASK, \
 644                         .active_discharge_reg = MAX77620_REG_##_id##_CFG2, \
 645                         .type = REGULATOR_VOLTAGE,                      \
 646                 },                                                      \
 647         }
 648
 649 static struct max77620_regulator_info max77620_regs_info[MAX77620_NUM_REGS] = {
 650         RAIL_SD(SD0, sd0, "in-sd0", SD0, 600000, 1400000, 12500, 0x22, SD0),
 651         RAIL_SD(SD1, sd1, "in-sd1", SD1, 600000, 1550000, 12500, 0x22, SD1),
 652         RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE),
 653         RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE),
 654         RAIL_SD(SD4, sd4, "in-sd4", SDX, 600000, 3787500, 12500, 0xFF, NONE),
 655
 656         RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000),
 657         RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000),
 658         RAIL_LDO(LDO2, ldo2, "in-ldo2",   P, 800000, 3950000, 50000),
 659         RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000),
 660         RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500),
 661         RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000),
 662         RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000),
 663         RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000),
 664         RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000),
 665 };
 666
 667 static struct max77620_regulator_info max20024_regs_info[MAX77620_NUM_REGS] = {
 668         RAIL_SD(SD0, sd0, "in-sd0", SD0, 800000, 1587500, 12500, 0x22, SD0),
 669         RAIL_SD(SD1, sd1, "in-sd1", SD1, 600000, 3387500, 12500, 0x22, SD1),
 670         RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE),
 671         RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE),
 672         RAIL_SD(SD4, sd4, "in-sd4", SDX, 600000, 3787500, 12500, 0xFF, NONE),
 673
 674         RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000),
 675         RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000),
 676         RAIL_LDO(LDO2, ldo2, "in-ldo2",   P, 800000, 3950000, 50000),
 677         RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000),
 678         RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500),
 679         RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000),
 680         RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000),
 681         RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000),
 682         RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000),
 683 };
 684
 685 static int max77620_regulator_probe(struct platform_device *pdev)
 686 {
 687         struct max77620_chip *max77620_chip = dev_get_drvdata(pdev->dev.parent);
 688         struct max77620_regulator_info *rinfo;
 689         struct device *dev = &pdev->dev;
 690         struct regulator_config config = { };
 691         struct max77620_regulator *pmic;
 692         int ret = 0;
 693         int id;
 694
 695         pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
 696         if (!pmic)
 697                 return -ENOMEM;
 698
 699         platform_set_drvdata(pdev, pmic);
 700         pmic->dev = dev;
 701         pmic->rmap = max77620_chip->rmap;
 702         if (!dev->of_node)
 703                 dev->of_node = pdev->dev.parent->of_node;
 704
 705         switch (max77620_chip->chip_id) {
 706         case MAX77620:
 707                 rinfo = max77620_regs_info;
 708                 break;
 709         default:
 710                 rinfo = max20024_regs_info;
 711                 break;
 712         }
 713
 714         config.regmap = pmic->rmap;
 715         config.dev = dev;
 716         config.driver_data = pmic;
 717
 718         for (id = 0; id < MAX77620_NUM_REGS; id++) {
 719                 struct regulator_dev *rdev;
 720                 struct regulator_desc *rdesc;
 721
 722                 if ((max77620_chip->chip_id == MAX77620) &&
 723                     (id == MAX77620_REGULATOR_ID_SD4))
 724                         continue;
 725
 726                 rdesc = &rinfo[id].desc;
 727                 pmic->rinfo[id] = &max77620_regs_info[id];
 728                 pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
 729
 730                 ret = max77620_read_slew_rate(pmic, id);
 731                 if (ret < 0)
 732                         return ret;
 733
 734                 rdev = devm_regulator_register(dev, rdesc, &config);
 735                 if (IS_ERR(rdev)) {
 736                         ret = PTR_ERR(rdev);
 737                         dev_err(dev, "Regulator registration %s failed: %d\n",
 738                                 rdesc->name, ret);
 739                         return ret;
 740                 }
 741         }
 742
 743         return 0;
 744 }
 745
 746 #ifdef CONFIG_PM_SLEEP
 747 static int max77620_regulator_suspend(struct device *dev)
 748 {
 749         struct max77620_regulator *pmic = dev_get_drvdata(dev);
 750         struct max77620_regulator_pdata *reg_pdata;
 751         int id;
 752
 753         for (id = 0; id < MAX77620_NUM_REGS; id++) {
 754                 reg_pdata = &pmic->reg_pdata[id];
 755
 756                 max77620_regulator_set_fps_slots(pmic, id, true);
 757                 if (reg_pdata->suspend_fps_src < 0)
 758                         continue;
 759
 760                 max77620_regulator_set_fps_src(pmic, reg_pdata->suspend_fps_src,
 761                                                id);
 762         }
 763
 764         return 0;
 765 }
 766
 767 static int max77620_regulator_resume(struct device *dev)
 768 {
 769         struct max77620_regulator *pmic = dev_get_drvdata(dev);
 770         struct max77620_regulator_pdata *reg_pdata;
 771         int id;
 772
 773         for (id = 0; id < MAX77620_NUM_REGS; id++) {
 774                 reg_pdata = &pmic->reg_pdata[id];
 775
 776                 max77620_regulator_set_fps_slots(pmic, id, false);
 777                 if (reg_pdata->active_fps_src < 0)
 778                         continue;
 779                 max77620_regulator_set_fps_src(pmic, reg_pdata->active_fps_src,
 780                                                id);
 781         }
 782
 783         return 0;
 784 }
 785 #endif
 786
 787 static const struct dev_pm_ops max77620_regulator_pm_ops = {
 788         SET_SYSTEM_SLEEP_PM_OPS(max77620_regulator_suspend,
 789                                 max77620_regulator_resume)
 790 };
 791
 792 static const struct platform_device_id max77620_regulator_devtype[] = {
 793         { .name = "max77620-pmic", },
 794         { .name = "max20024-pmic", },
 795         {},
 796 };
 797 MODULE_DEVICE_TABLE(platform, max77620_regulator_devtype);
 798
 799 static struct platform_driver max77620_regulator_driver = {
 800         .probe = max77620_regulator_probe,
 801         .id_table = max77620_regulator_devtype,
 802         .driver = {
 803                 .name = "max77620-pmic",
 804                 .pm = &max77620_regulator_pm_ops,
 805         },
 806 };
 807
 808 module_platform_driver(max77620_regulator_driver);
 809
 810 MODULE_DESCRIPTION("MAX77620/MAX20024 regulator driver");
 811 MODULE_AUTHOR("Mallikarjun Kasoju <mkasoju@nvidia.com>");
 812 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
 813 MODULE_LICENSE("GPL v2");