drivers/regulator/max77620-regulator.c

   1 /*
   2  * Maxim MAX77620 Regulator driver
   3  *
   4  * Copyright (c) 2016-2018, 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         int active_fps_src;
  77         int active_fps_pd_slot;
  78         int active_fps_pu_slot;
  79         int suspend_fps_src;
  80         int suspend_fps_pd_slot;
  81         int suspend_fps_pu_slot;
  82         int current_mode;
  83         int power_ok;
  84         int ramp_rate_setting;
  85 };
  86
  87 struct max77620_regulator {
  88         struct device *dev;
  89         struct regmap *rmap;
  90         struct max77620_regulator_info *rinfo[MAX77620_NUM_REGS];
  91         struct max77620_regulator_pdata reg_pdata[MAX77620_NUM_REGS];
  92         int enable_power_mode[MAX77620_NUM_REGS];
  93         int current_power_mode[MAX77620_NUM_REGS];
  94         int active_fps_src[MAX77620_NUM_REGS];
  95 };
  96
  97 #define fps_src_name(fps_src)   \
  98         (fps_src == MAX77620_FPS_SRC_0 ? "FPS_SRC_0" :  \
  99         fps_src == MAX77620_FPS_SRC_1 ? "FPS_SRC_1" :   \
 100         fps_src == MAX77620_FPS_SRC_2 ? "FPS_SRC_2" : "FPS_SRC_NONE")
 101
 102 static int max77620_regulator_get_fps_src(struct max77620_regulator *pmic,
 103                                           int id)
 104 {
 105         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 106         unsigned int val;
 107         int ret;
 108
 109         ret = regmap_read(pmic->rmap, rinfo->fps_addr, &val);
 110         if (ret < 0) {
 111                 dev_err(pmic->dev, "Reg 0x%02x read failed %d\n",
 112                         rinfo->fps_addr, ret);
 113                 return ret;
 114         }
 115
 116         return (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;
 117 }
 118
 119 static int max77620_regulator_set_fps_src(struct max77620_regulator *pmic,
 120                                           int fps_src, int id)
 121 {
 122         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 123         unsigned int val;
 124         int ret;
 125
 126         if (!rinfo)
 127                 return 0;
 128
 129         switch (fps_src) {
 130         case MAX77620_FPS_SRC_0:
 131         case MAX77620_FPS_SRC_1:
 132         case MAX77620_FPS_SRC_2:
 133         case MAX77620_FPS_SRC_NONE:
 134                 break;
 135
 136         case MAX77620_FPS_SRC_DEF:
 137                 ret = regmap_read(pmic->rmap, rinfo->fps_addr, &val);
 138                 if (ret < 0) {
 139                         dev_err(pmic->dev, "Reg 0x%02x read failed %d\n",
 140                                 rinfo->fps_addr, ret);
 141                         return ret;
 142                 }
 143                 ret = (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;
 144                 pmic->active_fps_src[id] = ret;
 145                 return 0;
 146
 147         default:
 148                 dev_err(pmic->dev, "Invalid FPS %d for regulator %d\n",
 149                         fps_src, id);
 150                 return -EINVAL;
 151         }
 152
 153         ret = regmap_update_bits(pmic->rmap, rinfo->fps_addr,
 154                                  MAX77620_FPS_SRC_MASK,
 155                                  fps_src << MAX77620_FPS_SRC_SHIFT);
 156         if (ret < 0) {
 157                 dev_err(pmic->dev, "Reg 0x%02x update failed %d\n",
 158                         rinfo->fps_addr, ret);
 159                 return ret;
 160         }
 161         pmic->active_fps_src[id] = fps_src;
 162
 163         return 0;
 164 }
 165
 166 static int max77620_regulator_set_fps_slots(struct max77620_regulator *pmic,
 167                                             int id, bool is_suspend)
 168 {
 169         struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
 170         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 171         unsigned int val = 0;
 172         unsigned int mask = 0;
 173         int pu = rpdata->active_fps_pu_slot;
 174         int pd = rpdata->active_fps_pd_slot;
 175         int ret = 0;
 176
 177         if (!rinfo)
 178                 return 0;
 179
 180         if (is_suspend) {
 181                 pu = rpdata->suspend_fps_pu_slot;
 182                 pd = rpdata->suspend_fps_pd_slot;
 183         }
 184
 185         /* FPS power up period setting */
 186         if (pu >= 0) {
 187                 val |= (pu << MAX77620_FPS_PU_PERIOD_SHIFT);
 188                 mask |= MAX77620_FPS_PU_PERIOD_MASK;
 189         }
 190
 191         /* FPS power down period setting */
 192         if (pd >= 0) {
 193                 val |= (pd << MAX77620_FPS_PD_PERIOD_SHIFT);
 194                 mask |= MAX77620_FPS_PD_PERIOD_MASK;
 195         }
 196
 197         if (mask) {
 198                 ret = regmap_update_bits(pmic->rmap, rinfo->fps_addr,
 199                                          mask, val);
 200                 if (ret < 0) {
 201                         dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
 202                                 rinfo->fps_addr, ret);
 203                         return ret;
 204                 }
 205         }
 206
 207         return ret;
 208 }
 209
 210 static int max77620_regulator_set_power_mode(struct max77620_regulator *pmic,
 211                                              int power_mode, int id)
 212 {
 213         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 214         u8 mask = rinfo->power_mode_mask;
 215         u8 shift = rinfo->power_mode_shift;
 216         u8 addr;
 217         int ret;
 218
 219         switch (rinfo->type) {
 220         case MAX77620_REGULATOR_TYPE_SD:
 221                 addr = rinfo->cfg_addr;
 222                 break;
 223         default:
 224                 addr = rinfo->volt_addr;
 225                 break;
 226         }
 227
 228         ret = regmap_update_bits(pmic->rmap, addr, mask, power_mode << shift);
 229         if (ret < 0) {
 230                 dev_err(pmic->dev, "Regulator %d mode set failed: %d\n",
 231                         id, ret);
 232                 return ret;
 233         }
 234         pmic->current_power_mode[id] = power_mode;
 235
 236         return ret;
 237 }
 238
 239 static int max77620_regulator_get_power_mode(struct max77620_regulator *pmic,
 240                                              int id)
 241 {
 242         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 243         unsigned int val, addr;
 244         u8 mask = rinfo->power_mode_mask;
 245         u8 shift = rinfo->power_mode_shift;
 246         int ret;
 247
 248         switch (rinfo->type) {
 249         case MAX77620_REGULATOR_TYPE_SD:
 250                 addr = rinfo->cfg_addr;
 251                 break;
 252         default:
 253                 addr = rinfo->volt_addr;
 254                 break;
 255         }
 256
 257         ret = regmap_read(pmic->rmap, addr, &val);
 258         if (ret < 0) {
 259                 dev_err(pmic->dev, "Regulator %d: Reg 0x%02x read failed: %d\n",
 260                         id, addr, ret);
 261                 return ret;
 262         }
 263
 264         return (val & mask) >> shift;
 265 }
 266
 267 static int max77620_read_slew_rate(struct max77620_regulator *pmic, int id)
 268 {
 269         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 270         unsigned int rval;
 271         int slew_rate;
 272         int ret;
 273
 274         ret = regmap_read(pmic->rmap, rinfo->cfg_addr, &rval);
 275         if (ret < 0) {
 276                 dev_err(pmic->dev, "Register 0x%02x read failed: %d\n",
 277                         rinfo->cfg_addr, ret);
 278                 return ret;
 279         }
 280
 281         switch (rinfo->type) {
 282         case MAX77620_REGULATOR_TYPE_SD:
 283                 slew_rate = (rval >> MAX77620_SD_SR_SHIFT) & 0x3;
 284                 switch (slew_rate) {
 285                 case 0:
 286                         slew_rate = 13750;
 287                         break;
 288                 case 1:
 289                         slew_rate = 27500;
 290                         break;
 291                 case 2:
 292                         slew_rate = 55000;
 293                         break;
 294                 case 3:
 295                         slew_rate = 100000;
 296                         break;
 297                 }
 298                 rinfo->desc.ramp_delay = slew_rate;
 299                 break;
 300         default:
 301                 slew_rate = rval & 0x1;
 302                 switch (slew_rate) {
 303                 case 0:
 304                         slew_rate = 100000;
 305                         break;
 306                 case 1:
 307                         slew_rate = 5000;
 308                         break;
 309                 }
 310                 rinfo->desc.ramp_delay = slew_rate;
 311                 break;
 312         }
 313
 314         return 0;
 315 }
 316
 317 static int max77620_set_slew_rate(struct max77620_regulator *pmic, int id,
 318                                   int slew_rate)
 319 {
 320         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 321         unsigned int val;
 322         int ret;
 323         u8 mask;
 324
 325         if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
 326                 if (slew_rate <= 13750)
 327                         val = 0;
 328                 else if (slew_rate <= 27500)
 329                         val = 1;
 330                 else if (slew_rate <= 55000)
 331                         val = 2;
 332                 else
 333                         val = 3;
 334                 val <<= MAX77620_SD_SR_SHIFT;
 335                 mask = MAX77620_SD_SR_MASK;
 336         } else {
 337                 if (slew_rate <= 5000)
 338                         val = 1;
 339                 else
 340                         val = 0;
 341                 mask = MAX77620_LDO_SLEW_RATE_MASK;
 342         }
 343
 344         ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr, mask, val);
 345         if (ret < 0) {
 346                 dev_err(pmic->dev, "Regulator %d slew rate set failed: %d\n",
 347                         id, ret);
 348                 return ret;
 349         }
 350
 351         return 0;
 352 }
 353
 354 static int max77620_config_power_ok(struct max77620_regulator *pmic, int id)
 355 {
 356         struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
 357         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 358         struct max77620_chip *chip = dev_get_drvdata(pmic->dev->parent);
 359         u8 val, mask;
 360         int ret;
 361
 362         switch (chip->chip_id) {
 363         case MAX20024:
 364                 if (rpdata->power_ok >= 0) {
 365                         if (rinfo->type == MAX77620_REGULATOR_TYPE_SD)
 366                                 mask = MAX20024_SD_CFG1_MPOK_MASK;
 367                         else
 368                                 mask = MAX20024_LDO_CFG2_MPOK_MASK;
 369
 370                         val = rpdata->power_ok ? mask : 0;
 371
 372                         ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr,
 373                                                  mask, val);
 374                         if (ret < 0) {
 375                                 dev_err(pmic->dev, "Reg 0x%02x update failed %d\n",
 376                                         rinfo->cfg_addr, ret);
 377                                 return ret;
 378                         }
 379                 }
 380                 break;
 381
 382         default:
 383                 break;
 384         }
 385
 386         return 0;
 387 }
 388
 389 static int max77620_init_pmic(struct max77620_regulator *pmic, int id)
 390 {
 391         struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
 392         int ret;
 393
 394         max77620_config_power_ok(pmic, id);
 395
 396         /* Update power mode */
 397         ret = max77620_regulator_get_power_mode(pmic, id);
 398         if (ret < 0)
 399                 return ret;
 400
 401         pmic->current_power_mode[id] = ret;
 402         pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
 403
 404         if (rpdata->active_fps_src == MAX77620_FPS_SRC_DEF) {
 405                 ret = max77620_regulator_get_fps_src(pmic, id);
 406                 if (ret < 0)
 407                         return ret;
 408                 rpdata->active_fps_src = ret;
 409         }
 410
 411          /* If rails are externally control of FPS then enable it always. */
 412         if (rpdata->active_fps_src == MAX77620_FPS_SRC_NONE) {
 413                 ret = max77620_regulator_set_power_mode(pmic,
 414                                         pmic->enable_power_mode[id], id);
 415                 if (ret < 0)
 416                         return ret;
 417         } else {
 418                 if (pmic->current_power_mode[id] !=
 419                      pmic->enable_power_mode[id]) {
 420                         ret = max77620_regulator_set_power_mode(pmic,
 421                                         pmic->enable_power_mode[id], id);
 422                         if (ret < 0)
 423                                 return ret;
 424                 }
 425         }
 426
 427         ret = max77620_regulator_set_fps_src(pmic, rpdata->active_fps_src, id);
 428         if (ret < 0)
 429                 return ret;
 430
 431         ret = max77620_regulator_set_fps_slots(pmic, id, false);
 432         if (ret < 0)
 433                 return ret;
 434
 435         if (rpdata->ramp_rate_setting) {
 436                 ret = max77620_set_slew_rate(pmic, id,
 437                                              rpdata->ramp_rate_setting);
 438                 if (ret < 0)
 439                         return ret;
 440         }
 441
 442         return 0;
 443 }
 444
 445 static int max77620_regulator_enable(struct regulator_dev *rdev)
 446 {
 447         struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 448         int id = rdev_get_id(rdev);
 449
 450         if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
 451                 return 0;
 452
 453         return max77620_regulator_set_power_mode(pmic,
 454                         pmic->enable_power_mode[id], id);
 455 }
 456
 457 static int max77620_regulator_disable(struct regulator_dev *rdev)
 458 {
 459         struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 460         int id = rdev_get_id(rdev);
 461
 462         if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
 463                 return 0;
 464
 465         return max77620_regulator_set_power_mode(pmic,
 466                         MAX77620_POWER_MODE_DISABLE, id);
 467 }
 468
 469 static int max77620_regulator_is_enabled(struct regulator_dev *rdev)
 470 {
 471         struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 472         int id = rdev_get_id(rdev);
 473         int ret = 1;
 474
 475         if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
 476                 return 1;
 477
 478         ret = max77620_regulator_get_power_mode(pmic, id);
 479         if (ret < 0)
 480                 return ret;
 481
 482         if (ret != MAX77620_POWER_MODE_DISABLE)
 483                 return 1;
 484
 485         return 0;
 486 }
 487
 488 static int max77620_regulator_set_mode(struct regulator_dev *rdev,
 489                                        unsigned int mode)
 490 {
 491         struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 492         int id = rdev_get_id(rdev);
 493         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 494         struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
 495         bool fpwm = false;
 496         int power_mode;
 497         int ret;
 498         u8 val;
 499
 500         switch (mode) {
 501         case REGULATOR_MODE_FAST:
 502                 fpwm = true;
 503                 power_mode = MAX77620_POWER_MODE_NORMAL;
 504                 break;
 505
 506         case REGULATOR_MODE_NORMAL:
 507                 power_mode = MAX77620_POWER_MODE_NORMAL;
 508                 break;
 509
 510         case REGULATOR_MODE_IDLE:
 511                 power_mode = MAX77620_POWER_MODE_LPM;
 512                 break;
 513
 514         default:
 515                 dev_err(pmic->dev, "Regulator %d mode %d is invalid\n",
 516                         id, mode);
 517                 return -EINVAL;
 518         }
 519
 520         if (rinfo->type != MAX77620_REGULATOR_TYPE_SD)
 521                 goto skip_fpwm;
 522
 523         val = (fpwm) ? MAX77620_SD_FPWM_MASK : 0;
 524         ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr,
 525                                  MAX77620_SD_FPWM_MASK, val);
 526         if (ret < 0) {
 527                 dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
 528                         rinfo->cfg_addr, ret);
 529                 return ret;
 530         }
 531         rpdata->current_mode = mode;
 532
 533 skip_fpwm:
 534         ret = max77620_regulator_set_power_mode(pmic, power_mode, id);
 535         if (ret < 0)
 536                 return ret;
 537
 538         pmic->enable_power_mode[id] = power_mode;
 539
 540         return 0;
 541 }
 542
 543 static unsigned int max77620_regulator_get_mode(struct regulator_dev *rdev)
 544 {
 545         struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 546         int id = rdev_get_id(rdev);
 547         struct max77620_regulator_info *rinfo = pmic->rinfo[id];
 548         int fpwm = 0;
 549         int ret;
 550         int pm_mode, reg_mode;
 551         unsigned int val;
 552
 553         ret = max77620_regulator_get_power_mode(pmic, id);
 554         if (ret < 0)
 555                 return 0;
 556
 557         pm_mode = ret;
 558
 559         if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
 560                 ret = regmap_read(pmic->rmap, rinfo->cfg_addr, &val);
 561                 if (ret < 0) {
 562                         dev_err(pmic->dev, "Reg 0x%02x read failed: %d\n",
 563                                 rinfo->cfg_addr, ret);
 564                         return ret;
 565                 }
 566                 fpwm = !!(val & MAX77620_SD_FPWM_MASK);
 567         }
 568
 569         switch (pm_mode) {
 570         case MAX77620_POWER_MODE_NORMAL:
 571         case MAX77620_POWER_MODE_DISABLE:
 572                 if (fpwm)
 573                         reg_mode = REGULATOR_MODE_FAST;
 574                 else
 575                         reg_mode = REGULATOR_MODE_NORMAL;
 576                 break;
 577         case MAX77620_POWER_MODE_LPM:
 578         case MAX77620_POWER_MODE_GLPM:
 579                 reg_mode = REGULATOR_MODE_IDLE;
 580                 break;
 581         default:
 582                 return 0;
 583         }
 584
 585         return reg_mode;
 586 }
 587
 588 static int max77620_regulator_set_ramp_delay(struct regulator_dev *rdev,
 589                                              int ramp_delay)
 590 {
 591         struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 592         int id = rdev_get_id(rdev);
 593         struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
 594
 595         /* Device specific ramp rate setting tells that platform has
 596          * different ramp rate from advertised value. In this case,
 597          * do not configure anything and just return success.
 598          */
 599         if (rpdata->ramp_rate_setting)
 600                 return 0;
 601
 602         return max77620_set_slew_rate(pmic, id, ramp_delay);
 603 }
 604
 605 static int max77620_of_parse_cb(struct device_node *np,
 606                                 const struct regulator_desc *desc,
 607                                 struct regulator_config *config)
 608 {
 609         struct max77620_regulator *pmic = config->driver_data;
 610         struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[desc->id];
 611         u32 pval;
 612         int ret;
 613
 614         ret = of_property_read_u32(np, "maxim,active-fps-source", &pval);
 615         rpdata->active_fps_src = (!ret) ? pval : MAX77620_FPS_SRC_DEF;
 616
 617         ret = of_property_read_u32(np, "maxim,active-fps-power-up-slot", &pval);
 618         rpdata->active_fps_pu_slot = (!ret) ? pval : -1;
 619
 620         ret = of_property_read_u32(
 621                         np, "maxim,active-fps-power-down-slot", &pval);
 622         rpdata->active_fps_pd_slot = (!ret) ? pval : -1;
 623
 624         ret = of_property_read_u32(np, "maxim,suspend-fps-source", &pval);
 625         rpdata->suspend_fps_src = (!ret) ? pval : -1;
 626
 627         ret = of_property_read_u32(
 628                         np, "maxim,suspend-fps-power-up-slot", &pval);
 629         rpdata->suspend_fps_pu_slot = (!ret) ? pval : -1;
 630
 631         ret = of_property_read_u32(
 632                         np, "maxim,suspend-fps-power-down-slot", &pval);
 633         rpdata->suspend_fps_pd_slot = (!ret) ? pval : -1;
 634
 635         ret = of_property_read_u32(np, "maxim,power-ok-control", &pval);
 636         if (!ret)
 637                 rpdata->power_ok = pval;
 638         else
 639                 rpdata->power_ok = -1;
 640
 641         ret = of_property_read_u32(np, "maxim,ramp-rate-setting", &pval);
 642         rpdata->ramp_rate_setting = (!ret) ? pval : 0;
 643
 644         return max77620_init_pmic(pmic, desc->id);
 645 }
 646
 647 static const struct regulator_ops max77620_regulator_ops = {
 648         .is_enabled = max77620_regulator_is_enabled,
 649         .enable = max77620_regulator_enable,
 650         .disable = max77620_regulator_disable,
 651         .list_voltage = regulator_list_voltage_linear,
 652         .map_voltage = regulator_map_voltage_linear,
 653         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 654         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 655         .set_mode = max77620_regulator_set_mode,
 656         .get_mode = max77620_regulator_get_mode,
 657         .set_ramp_delay = max77620_regulator_set_ramp_delay,
 658         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 659         .set_active_discharge = regulator_set_active_discharge_regmap,
 660 };
 661
 662 #define MAX77620_SD_CNF2_ROVS_EN_NONE   0
 663 #define RAIL_SD(_id, _name, _sname, _volt_mask, _min_uV, _max_uV,       \
 664                 _step_uV, _rs_add, _rs_mask)                            \
 665         [MAX77620_REGULATOR_ID_##_id] = {                               \
 666                 .type = MAX77620_REGULATOR_TYPE_SD,                     \
 667                 .volt_addr = MAX77620_REG_##_id,                        \
 668                 .cfg_addr = MAX77620_REG_##_id##_CFG,                   \
 669                 .fps_addr = MAX77620_REG_FPS_##_id,                     \
 670                 .remote_sense_addr = _rs_add,                           \
 671                 .remote_sense_mask = MAX77620_SD_CNF2_ROVS_EN_##_rs_mask, \
 672                 .power_mode_mask = MAX77620_SD_POWER_MODE_MASK,         \
 673                 .power_mode_shift = MAX77620_SD_POWER_MODE_SHIFT,       \
 674                 .desc = {                                               \
 675                         .name = max77620_rails(_name),                  \
 676                         .of_match = of_match_ptr(#_name),               \
 677                         .regulators_node = of_match_ptr("regulators"),  \
 678                         .of_parse_cb = max77620_of_parse_cb,            \
 679                         .supply_name = _sname,                          \
 680                         .id = MAX77620_REGULATOR_ID_##_id,              \
 681                         .ops = &max77620_regulator_ops,                 \
 682                         .n_voltages = ((_max_uV - _min_uV) / _step_uV) + 1, \
 683                         .min_uV = _min_uV,                              \
 684                         .uV_step = _step_uV,                            \
 685                         .enable_time = 500,                             \
 686                         .vsel_mask = MAX77620_##_volt_mask##_VOLT_MASK, \
 687                         .vsel_reg = MAX77620_REG_##_id,                 \
 688                         .active_discharge_off = 0,                      \
 689                         .active_discharge_on = MAX77620_SD_CFG1_ADE_ENABLE, \
 690                         .active_discharge_mask = MAX77620_SD_CFG1_ADE_MASK, \
 691                         .active_discharge_reg = MAX77620_REG_##_id##_CFG, \
 692                         .type = REGULATOR_VOLTAGE,                      \
 693                 },                                                      \
 694         }
 695
 696 #define RAIL_LDO(_id, _name, _sname, _type, _min_uV, _max_uV, _step_uV) \
 697         [MAX77620_REGULATOR_ID_##_id] = {                               \
 698                 .type = MAX77620_REGULATOR_TYPE_LDO_##_type,            \
 699                 .volt_addr = MAX77620_REG_##_id##_CFG,                  \
 700                 .cfg_addr = MAX77620_REG_##_id##_CFG2,                  \
 701                 .fps_addr = MAX77620_REG_FPS_##_id,                     \
 702                 .remote_sense_addr = 0xFF,                              \
 703                 .power_mode_mask = MAX77620_LDO_POWER_MODE_MASK,        \
 704                 .power_mode_shift = MAX77620_LDO_POWER_MODE_SHIFT,      \
 705                 .desc = {                                               \
 706                         .name = max77620_rails(_name),                  \
 707                         .of_match = of_match_ptr(#_name),               \
 708                         .regulators_node = of_match_ptr("regulators"),  \
 709                         .of_parse_cb = max77620_of_parse_cb,            \
 710                         .supply_name = _sname,                          \
 711                         .id = MAX77620_REGULATOR_ID_##_id,              \
 712                         .ops = &max77620_regulator_ops,                 \
 713                         .n_voltages = ((_max_uV - _min_uV) / _step_uV) + 1, \
 714                         .min_uV = _min_uV,                              \
 715                         .uV_step = _step_uV,                            \
 716                         .enable_time = 500,                             \
 717                         .vsel_mask = MAX77620_LDO_VOLT_MASK,            \
 718                         .vsel_reg = MAX77620_REG_##_id##_CFG,           \
 719                         .active_discharge_off = 0,                      \
 720                         .active_discharge_on = MAX77620_LDO_CFG2_ADE_ENABLE, \
 721                         .active_discharge_mask = MAX77620_LDO_CFG2_ADE_MASK, \
 722                         .active_discharge_reg = MAX77620_REG_##_id##_CFG2, \
 723                         .type = REGULATOR_VOLTAGE,                      \
 724                 },                                                      \
 725         }
 726
 727 static struct max77620_regulator_info max77620_regs_info[MAX77620_NUM_REGS] = {
 728         RAIL_SD(SD0, sd0, "in-sd0", SD0, 600000, 1400000, 12500, 0x22, SD0),
 729         RAIL_SD(SD1, sd1, "in-sd1", SD1, 600000, 1550000, 12500, 0x22, SD1),
 730         RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE),
 731         RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE),
 732
 733         RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000),
 734         RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000),
 735         RAIL_LDO(LDO2, ldo2, "in-ldo2",   P, 800000, 3950000, 50000),
 736         RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000),
 737         RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500),
 738         RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000),
 739         RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000),
 740         RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000),
 741         RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000),
 742 };
 743
 744 static struct max77620_regulator_info max20024_regs_info[MAX77620_NUM_REGS] = {
 745         RAIL_SD(SD0, sd0, "in-sd0", SD0, 800000, 1587500, 12500, 0x22, SD0),
 746         RAIL_SD(SD1, sd1, "in-sd1", SD1, 600000, 3387500, 12500, 0x22, SD1),
 747         RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE),
 748         RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE),
 749         RAIL_SD(SD4, sd4, "in-sd4", SDX, 600000, 3787500, 12500, 0xFF, NONE),
 750
 751         RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000),
 752         RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000),
 753         RAIL_LDO(LDO2, ldo2, "in-ldo2",   P, 800000, 3950000, 50000),
 754         RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000),
 755         RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500),
 756         RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000),
 757         RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000),
 758         RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000),
 759         RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000),
 760 };
 761
 762 static int max77620_regulator_probe(struct platform_device *pdev)
 763 {
 764         struct max77620_chip *max77620_chip = dev_get_drvdata(pdev->dev.parent);
 765         struct max77620_regulator_info *rinfo;
 766         struct device *dev = &pdev->dev;
 767         struct regulator_config config = { };
 768         struct max77620_regulator *pmic;
 769         int ret = 0;
 770         int id;
 771
 772         pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
 773         if (!pmic)
 774                 return -ENOMEM;
 775
 776         platform_set_drvdata(pdev, pmic);
 777         pmic->dev = dev;
 778         pmic->rmap = max77620_chip->rmap;
 779         if (!dev->of_node)
 780                 dev->of_node = pdev->dev.parent->of_node;
 781
 782         switch (max77620_chip->chip_id) {
 783         case MAX77620:
 784                 rinfo = max77620_regs_info;
 785                 break;
 786         default:
 787                 rinfo = max20024_regs_info;
 788                 break;
 789         }
 790
 791         config.regmap = pmic->rmap;
 792         config.dev = dev;
 793         config.driver_data = pmic;
 794
 795         /*
 796          * Set of_node_reuse flag to prevent driver core from attempting to
 797          * claim any pinmux resources already claimed by the parent device.
 798          * Otherwise PMIC driver will fail to re-probe.
 799          */
 800         device_set_of_node_from_dev(&pdev->dev, pdev->dev.parent);
 801
 802         for (id = 0; id < MAX77620_NUM_REGS; id++) {
 803                 struct regulator_dev *rdev;
 804                 struct regulator_desc *rdesc;
 805
 806                 if ((max77620_chip->chip_id == MAX77620) &&
 807                     (id == MAX77620_REGULATOR_ID_SD4))
 808                         continue;
 809
 810                 rdesc = &rinfo[id].desc;
 811                 pmic->rinfo[id] = &max77620_regs_info[id];
 812                 pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
 813                 pmic->reg_pdata[id].active_fps_src = -1;
 814                 pmic->reg_pdata[id].active_fps_pd_slot = -1;
 815                 pmic->reg_pdata[id].active_fps_pu_slot = -1;
 816                 pmic->reg_pdata[id].suspend_fps_src = -1;
 817                 pmic->reg_pdata[id].suspend_fps_pd_slot = -1;
 818                 pmic->reg_pdata[id].suspend_fps_pu_slot = -1;
 819                 pmic->reg_pdata[id].power_ok = -1;
 820                 pmic->reg_pdata[id].ramp_rate_setting = -1;
 821
 822                 ret = max77620_read_slew_rate(pmic, id);
 823                 if (ret < 0)
 824                         return ret;
 825
 826                 rdev = devm_regulator_register(dev, rdesc, &config);
 827                 if (IS_ERR(rdev)) {
 828                         ret = PTR_ERR(rdev);
 829                         dev_err(dev, "Regulator registration %s failed: %d\n",
 830                                 rdesc->name, ret);
 831                         return ret;
 832                 }
 833         }
 834
 835         return 0;
 836 }
 837
 838 #ifdef CONFIG_PM_SLEEP
 839 static int max77620_regulator_suspend(struct device *dev)
 840 {
 841         struct max77620_regulator *pmic = dev_get_drvdata(dev);
 842         struct max77620_regulator_pdata *reg_pdata;
 843         int id;
 844
 845         for (id = 0; id < MAX77620_NUM_REGS; id++) {
 846                 reg_pdata = &pmic->reg_pdata[id];
 847
 848                 max77620_regulator_set_fps_slots(pmic, id, true);
 849                 if (reg_pdata->suspend_fps_src < 0)
 850                         continue;
 851
 852                 max77620_regulator_set_fps_src(pmic, reg_pdata->suspend_fps_src,
 853                                                id);
 854         }
 855
 856         return 0;
 857 }
 858
 859 static int max77620_regulator_resume(struct device *dev)
 860 {
 861         struct max77620_regulator *pmic = dev_get_drvdata(dev);
 862         struct max77620_regulator_pdata *reg_pdata;
 863         int id;
 864
 865         for (id = 0; id < MAX77620_NUM_REGS; id++) {
 866                 reg_pdata = &pmic->reg_pdata[id];
 867
 868                 max77620_config_power_ok(pmic, id);
 869
 870                 max77620_regulator_set_fps_slots(pmic, id, false);
 871                 if (reg_pdata->active_fps_src < 0)
 872                         continue;
 873                 max77620_regulator_set_fps_src(pmic, reg_pdata->active_fps_src,
 874                                                id);
 875         }
 876
 877         return 0;
 878 }
 879 #endif
 880
 881 static const struct dev_pm_ops max77620_regulator_pm_ops = {
 882         SET_SYSTEM_SLEEP_PM_OPS(max77620_regulator_suspend,
 883                                 max77620_regulator_resume)
 884 };
 885
 886 static const struct platform_device_id max77620_regulator_devtype[] = {
 887         { .name = "max77620-pmic", },
 888         { .name = "max20024-pmic", },
 889         {},
 890 };
 891 MODULE_DEVICE_TABLE(platform, max77620_regulator_devtype);
 892
 893 static struct platform_driver max77620_regulator_driver = {
 894         .probe = max77620_regulator_probe,
 895         .id_table = max77620_regulator_devtype,
 896         .driver = {
 897                 .name = "max77620-pmic",
 898                 .pm = &max77620_regulator_pm_ops,
 899         },
 900 };
 901
 902 module_platform_driver(max77620_regulator_driver);
 903
 904 MODULE_DESCRIPTION("MAX77620/MAX20024 regulator driver");
 905 MODULE_AUTHOR("Mallikarjun Kasoju <mkasoju@nvidia.com>");
 906 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
 907 MODULE_LICENSE("GPL v2");