drivers/regulator/wm8350-regulator.c

   1 /*
   2  * wm8350.c  --  Voltage and current regulation for the Wolfson WM8350 PMIC
   3  *
   4  * Copyright 2007, 2008 Wolfson Microelectronics PLC.
   5  *
   6  * Author: Liam Girdwood
   7  *         linux@wolfsonmicro.com
   8  *
   9  *  This program is free software; you can redistribute  it and/or modify it
  10  *  under  the terms of  the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the  License, or (at your
  12  *  option) any later version.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/init.h>
  18 #include <linux/bitops.h>
  19 #include <linux/err.h>
  20 #include <linux/i2c.h>
  21 #include <linux/mfd/wm8350/core.h>
  22 #include <linux/mfd/wm8350/pmic.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/regulator/driver.h>
  25 #include <linux/regulator/machine.h>
  26
  27 /* Maximum value possible for VSEL */
  28 #define WM8350_DCDC_MAX_VSEL 0x66
  29
  30 /* Microamps */
  31 static const int isink_cur[] = {
  32         4,
  33         5,
  34         6,
  35         7,
  36         8,
  37         10,
  38         11,
  39         14,
  40         16,
  41         19,
  42         23,
  43         27,
  44         32,
  45         39,
  46         46,
  47         54,
  48         65,
  49         77,
  50         92,
  51         109,
  52         130,
  53         154,
  54         183,
  55         218,
  56         259,
  57         308,
  58         367,
  59         436,
  60         518,
  61         616,
  62         733,
  63         872,
  64         1037,
  65         1233,
  66         1466,
  67         1744,
  68         2073,
  69         2466,
  70         2933,
  71         3487,
  72         4147,
  73         4932,
  74         5865,
  75         6975,
  76         8294,
  77         9864,
  78         11730,
  79         13949,
  80         16589,
  81         19728,
  82         23460,
  83         27899,
  84         33178,
  85         39455,
  86         46920,
  87         55798,
  88         66355,
  89         78910,
  90         93840,
  91         111596,
  92         132710,
  93         157820,
  94         187681,
  95         223191
  96 };
  97
  98 static int get_isink_val(int min_uA, int max_uA, u16 *setting)
  99 {
 100         int i;
 101
 102         for (i = 0; i < ARRAY_SIZE(isink_cur); i++) {
 103                 if (min_uA <= isink_cur[i] && max_uA >= isink_cur[i]) {
 104                         *setting = i;
 105                         return 0;
 106                 }
 107         }
 108         return -EINVAL;
 109 }
 110
 111 static int wm8350_isink_set_current(struct regulator_dev *rdev, int min_uA,
 112         int max_uA)
 113 {
 114         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 115         int isink = rdev_get_id(rdev);
 116         u16 val, setting;
 117         int ret;
 118
 119         ret = get_isink_val(min_uA, max_uA, &setting);
 120         if (ret != 0)
 121                 return ret;
 122
 123         switch (isink) {
 124         case WM8350_ISINK_A:
 125                 val = wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_A) &
 126                     ~WM8350_CS1_ISEL_MASK;
 127                 wm8350_reg_write(wm8350, WM8350_CURRENT_SINK_DRIVER_A,
 128                                  val | setting);
 129                 break;
 130         case WM8350_ISINK_B:
 131                 val = wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_B) &
 132                     ~WM8350_CS1_ISEL_MASK;
 133                 wm8350_reg_write(wm8350, WM8350_CURRENT_SINK_DRIVER_B,
 134                                  val | setting);
 135                 break;
 136         default:
 137                 return -EINVAL;
 138         }
 139
 140         return 0;
 141 }
 142
 143 static int wm8350_isink_get_current(struct regulator_dev *rdev)
 144 {
 145         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 146         int isink = rdev_get_id(rdev);
 147         u16 val;
 148
 149         switch (isink) {
 150         case WM8350_ISINK_A:
 151                 val = wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_A) &
 152                     WM8350_CS1_ISEL_MASK;
 153                 break;
 154         case WM8350_ISINK_B:
 155                 val = wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_B) &
 156                     WM8350_CS1_ISEL_MASK;
 157                 break;
 158         default:
 159                 return 0;
 160         }
 161
 162         return isink_cur[val];
 163 }
 164
 165 /* turn on ISINK followed by DCDC */
 166 static int wm8350_isink_enable(struct regulator_dev *rdev)
 167 {
 168         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 169         int isink = rdev_get_id(rdev);
 170
 171         switch (isink) {
 172         case WM8350_ISINK_A:
 173                 switch (wm8350->pmic.isink_A_dcdc) {
 174                 case WM8350_DCDC_2:
 175                 case WM8350_DCDC_5:
 176                         wm8350_set_bits(wm8350, WM8350_POWER_MGMT_7,
 177                                         WM8350_CS1_ENA);
 178                         wm8350_set_bits(wm8350, WM8350_CSA_FLASH_CONTROL,
 179                                         WM8350_CS1_DRIVE);
 180                         wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
 181                                         1 << (wm8350->pmic.isink_A_dcdc -
 182                                               WM8350_DCDC_1));
 183                         break;
 184                 default:
 185                         return -EINVAL;
 186                 }
 187                 break;
 188         case WM8350_ISINK_B:
 189                 switch (wm8350->pmic.isink_B_dcdc) {
 190                 case WM8350_DCDC_2:
 191                 case WM8350_DCDC_5:
 192                         wm8350_set_bits(wm8350, WM8350_POWER_MGMT_7,
 193                                         WM8350_CS2_ENA);
 194                         wm8350_set_bits(wm8350, WM8350_CSB_FLASH_CONTROL,
 195                                         WM8350_CS2_DRIVE);
 196                         wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
 197                                         1 << (wm8350->pmic.isink_B_dcdc -
 198                                               WM8350_DCDC_1));
 199                         break;
 200                 default:
 201                         return -EINVAL;
 202                 }
 203                 break;
 204         default:
 205                 return -EINVAL;
 206         }
 207         return 0;
 208 }
 209
 210 static int wm8350_isink_disable(struct regulator_dev *rdev)
 211 {
 212         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 213         int isink = rdev_get_id(rdev);
 214
 215         switch (isink) {
 216         case WM8350_ISINK_A:
 217                 switch (wm8350->pmic.isink_A_dcdc) {
 218                 case WM8350_DCDC_2:
 219                 case WM8350_DCDC_5:
 220                         wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
 221                                           1 << (wm8350->pmic.isink_A_dcdc -
 222                                                 WM8350_DCDC_1));
 223                         wm8350_clear_bits(wm8350, WM8350_POWER_MGMT_7,
 224                                           WM8350_CS1_ENA);
 225                         break;
 226                 default:
 227                         return -EINVAL;
 228                 }
 229                 break;
 230         case WM8350_ISINK_B:
 231                 switch (wm8350->pmic.isink_B_dcdc) {
 232                 case WM8350_DCDC_2:
 233                 case WM8350_DCDC_5:
 234                         wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
 235                                           1 << (wm8350->pmic.isink_B_dcdc -
 236                                                 WM8350_DCDC_1));
 237                         wm8350_clear_bits(wm8350, WM8350_POWER_MGMT_7,
 238                                           WM8350_CS2_ENA);
 239                         break;
 240                 default:
 241                         return -EINVAL;
 242                 }
 243                 break;
 244         default:
 245                 return -EINVAL;
 246         }
 247         return 0;
 248 }
 249
 250 static int wm8350_isink_is_enabled(struct regulator_dev *rdev)
 251 {
 252         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 253         int isink = rdev_get_id(rdev);
 254
 255         switch (isink) {
 256         case WM8350_ISINK_A:
 257                 return wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_A) &
 258                     0x8000;
 259         case WM8350_ISINK_B:
 260                 return wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_B) &
 261                     0x8000;
 262         }
 263         return -EINVAL;
 264 }
 265
 266 static int wm8350_isink_enable_time(struct regulator_dev *rdev)
 267 {
 268         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 269         int isink = rdev_get_id(rdev);
 270         int reg;
 271
 272         switch (isink) {
 273         case WM8350_ISINK_A:
 274                 reg = wm8350_reg_read(wm8350, WM8350_CSA_FLASH_CONTROL);
 275                 break;
 276         case WM8350_ISINK_B:
 277                 reg = wm8350_reg_read(wm8350, WM8350_CSB_FLASH_CONTROL);
 278                 break;
 279         default:
 280                 return -EINVAL;
 281         }
 282
 283         if (reg & WM8350_CS1_FLASH_MODE) {
 284                 switch (reg & WM8350_CS1_ON_RAMP_MASK) {
 285                 case 0:
 286                         return 0;
 287                 case 1:
 288                         return 1950;
 289                 case 2:
 290                         return 3910;
 291                 case 3:
 292                         return 7800;
 293                 }
 294         } else {
 295                 switch (reg & WM8350_CS1_ON_RAMP_MASK) {
 296                 case 0:
 297                         return 0;
 298                 case 1:
 299                         return 250000;
 300                 case 2:
 301                         return 500000;
 302                 case 3:
 303                         return 1000000;
 304                 }
 305         }
 306
 307         return -EINVAL;
 308 }
 309
 310
 311 int wm8350_isink_set_flash(struct wm8350 *wm8350, int isink, u16 mode,
 312                            u16 trigger, u16 duration, u16 on_ramp, u16 off_ramp,
 313                            u16 drive)
 314 {
 315         switch (isink) {
 316         case WM8350_ISINK_A:
 317                 wm8350_reg_write(wm8350, WM8350_CSA_FLASH_CONTROL,
 318                                  (mode ? WM8350_CS1_FLASH_MODE : 0) |
 319                                  (trigger ? WM8350_CS1_TRIGSRC : 0) |
 320                                  duration | on_ramp | off_ramp | drive);
 321                 break;
 322         case WM8350_ISINK_B:
 323                 wm8350_reg_write(wm8350, WM8350_CSB_FLASH_CONTROL,
 324                                  (mode ? WM8350_CS2_FLASH_MODE : 0) |
 325                                  (trigger ? WM8350_CS2_TRIGSRC : 0) |
 326                                  duration | on_ramp | off_ramp | drive);
 327                 break;
 328         default:
 329                 return -EINVAL;
 330         }
 331         return 0;
 332 }
 333 EXPORT_SYMBOL_GPL(wm8350_isink_set_flash);
 334
 335 static int wm8350_dcdc_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 336 {
 337         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 338         int sel, volt_reg, dcdc = rdev_get_id(rdev);
 339         u16 val;
 340
 341         dev_dbg(wm8350->dev, "%s %d mV %d\n", __func__, dcdc, uV / 1000);
 342
 343         switch (dcdc) {
 344         case WM8350_DCDC_1:
 345                 volt_reg = WM8350_DCDC1_LOW_POWER;
 346                 break;
 347         case WM8350_DCDC_3:
 348                 volt_reg = WM8350_DCDC3_LOW_POWER;
 349                 break;
 350         case WM8350_DCDC_4:
 351                 volt_reg = WM8350_DCDC4_LOW_POWER;
 352                 break;
 353         case WM8350_DCDC_6:
 354                 volt_reg = WM8350_DCDC6_LOW_POWER;
 355                 break;
 356         case WM8350_DCDC_2:
 357         case WM8350_DCDC_5:
 358         default:
 359                 return -EINVAL;
 360         }
 361
 362         sel = regulator_map_voltage_linear(rdev, uV, uV);
 363         if (sel < 0)
 364                 return sel;
 365
 366         /* all DCDCs have same mV bits */
 367         val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_DC1_VSEL_MASK;
 368         wm8350_reg_write(wm8350, volt_reg, val | sel);
 369         return 0;
 370 }
 371
 372 static int wm8350_dcdc_set_suspend_enable(struct regulator_dev *rdev)
 373 {
 374         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 375         int dcdc = rdev_get_id(rdev);
 376         u16 val;
 377
 378         switch (dcdc) {
 379         case WM8350_DCDC_1:
 380                 val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER)
 381                         & ~WM8350_DCDC_HIB_MODE_MASK;
 382                 wm8350_reg_write(wm8350, WM8350_DCDC1_LOW_POWER,
 383                         val | wm8350->pmic.dcdc1_hib_mode);
 384                 break;
 385         case WM8350_DCDC_3:
 386                 val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER)
 387                         & ~WM8350_DCDC_HIB_MODE_MASK;
 388                 wm8350_reg_write(wm8350, WM8350_DCDC3_LOW_POWER,
 389                         val | wm8350->pmic.dcdc3_hib_mode);
 390                 break;
 391         case WM8350_DCDC_4:
 392                 val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER)
 393                         & ~WM8350_DCDC_HIB_MODE_MASK;
 394                 wm8350_reg_write(wm8350, WM8350_DCDC4_LOW_POWER,
 395                         val | wm8350->pmic.dcdc4_hib_mode);
 396                 break;
 397         case WM8350_DCDC_6:
 398                 val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER)
 399                         & ~WM8350_DCDC_HIB_MODE_MASK;
 400                 wm8350_reg_write(wm8350, WM8350_DCDC6_LOW_POWER,
 401                         val | wm8350->pmic.dcdc6_hib_mode);
 402                 break;
 403         case WM8350_DCDC_2:
 404         case WM8350_DCDC_5:
 405         default:
 406                 return -EINVAL;
 407         }
 408
 409         return 0;
 410 }
 411
 412 static int wm8350_dcdc_set_suspend_disable(struct regulator_dev *rdev)
 413 {
 414         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 415         int dcdc = rdev_get_id(rdev);
 416         u16 val;
 417
 418         switch (dcdc) {
 419         case WM8350_DCDC_1:
 420                 val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER);
 421                 wm8350->pmic.dcdc1_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
 422                 wm8350_reg_write(wm8350, WM8350_DCDC1_LOW_POWER,
 423                                  val | WM8350_DCDC_HIB_MODE_DIS);
 424                 break;
 425         case WM8350_DCDC_3:
 426                 val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER);
 427                 wm8350->pmic.dcdc3_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
 428                 wm8350_reg_write(wm8350, WM8350_DCDC3_LOW_POWER,
 429                                  val | WM8350_DCDC_HIB_MODE_DIS);
 430                 break;
 431         case WM8350_DCDC_4:
 432                 val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER);
 433                 wm8350->pmic.dcdc4_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
 434                 wm8350_reg_write(wm8350, WM8350_DCDC4_LOW_POWER,
 435                                  val | WM8350_DCDC_HIB_MODE_DIS);
 436                 break;
 437         case WM8350_DCDC_6:
 438                 val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER);
 439                 wm8350->pmic.dcdc6_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
 440                 wm8350_reg_write(wm8350, WM8350_DCDC6_LOW_POWER,
 441                                  val | WM8350_DCDC_HIB_MODE_DIS);
 442                 break;
 443         case WM8350_DCDC_2:
 444         case WM8350_DCDC_5:
 445         default:
 446                 return -EINVAL;
 447         }
 448
 449         return 0;
 450 }
 451
 452 static int wm8350_dcdc25_set_suspend_enable(struct regulator_dev *rdev)
 453 {
 454         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 455         int dcdc = rdev_get_id(rdev);
 456         u16 val;
 457
 458         switch (dcdc) {
 459         case WM8350_DCDC_2:
 460                 val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL)
 461                     & ~WM8350_DC2_HIB_MODE_MASK;
 462                 wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val |
 463                     (WM8350_DC2_HIB_MODE_ACTIVE << WM8350_DC2_HIB_MODE_SHIFT));
 464                 break;
 465         case WM8350_DCDC_5:
 466                 val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL)
 467                     & ~WM8350_DC5_HIB_MODE_MASK;
 468                 wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val |
 469                     (WM8350_DC5_HIB_MODE_ACTIVE << WM8350_DC5_HIB_MODE_SHIFT));
 470                 break;
 471         default:
 472                 return -EINVAL;
 473         }
 474         return 0;
 475 }
 476
 477 static int wm8350_dcdc25_set_suspend_disable(struct regulator_dev *rdev)
 478 {
 479         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 480         int dcdc = rdev_get_id(rdev);
 481         u16 val;
 482
 483         switch (dcdc) {
 484         case WM8350_DCDC_2:
 485                 val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL)
 486                     & ~WM8350_DC2_HIB_MODE_MASK;
 487                 wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val |
 488                     (WM8350_DC2_HIB_MODE_DISABLE << WM8350_DC2_HIB_MODE_SHIFT));
 489                 break;
 490         case WM8350_DCDC_5:
 491                 val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL)
 492                     & ~WM8350_DC5_HIB_MODE_MASK;
 493                 wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val |
 494                     (WM8350_DC5_HIB_MODE_DISABLE << WM8350_DC5_HIB_MODE_SHIFT));
 495                 break;
 496         default:
 497                 return -EINVAL;
 498         }
 499         return 0;
 500 }
 501
 502 static int wm8350_dcdc_set_suspend_mode(struct regulator_dev *rdev,
 503         unsigned int mode)
 504 {
 505         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 506         int dcdc = rdev_get_id(rdev);
 507         u16 *hib_mode;
 508
 509         switch (dcdc) {
 510         case WM8350_DCDC_1:
 511                 hib_mode = &wm8350->pmic.dcdc1_hib_mode;
 512                 break;
 513         case WM8350_DCDC_3:
 514                 hib_mode = &wm8350->pmic.dcdc3_hib_mode;
 515                 break;
 516         case WM8350_DCDC_4:
 517                 hib_mode = &wm8350->pmic.dcdc4_hib_mode;
 518                 break;
 519         case WM8350_DCDC_6:
 520                 hib_mode = &wm8350->pmic.dcdc6_hib_mode;
 521                 break;
 522         case WM8350_DCDC_2:
 523         case WM8350_DCDC_5:
 524         default:
 525                 return -EINVAL;
 526         }
 527
 528         switch (mode) {
 529         case REGULATOR_MODE_NORMAL:
 530                 *hib_mode = WM8350_DCDC_HIB_MODE_IMAGE;
 531                 break;
 532         case REGULATOR_MODE_IDLE:
 533                 *hib_mode = WM8350_DCDC_HIB_MODE_STANDBY;
 534                 break;
 535         case REGULATOR_MODE_STANDBY:
 536                 *hib_mode = WM8350_DCDC_HIB_MODE_LDO_IM;
 537                 break;
 538         default:
 539                 return -EINVAL;
 540         }
 541
 542         return 0;
 543 }
 544
 545 static const struct regulator_linear_range wm8350_ldo_ranges[] = {
 546         REGULATOR_LINEAR_RANGE(900000, 0, 15, 50000),
 547         REGULATOR_LINEAR_RANGE(1800000, 16, 31, 100000),
 548 };
 549
 550 static int wm8350_ldo_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 551 {
 552         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 553         int sel, volt_reg, ldo = rdev_get_id(rdev);
 554         u16 val;
 555
 556         dev_dbg(wm8350->dev, "%s %d mV %d\n", __func__, ldo, uV / 1000);
 557
 558         switch (ldo) {
 559         case WM8350_LDO_1:
 560                 volt_reg = WM8350_LDO1_LOW_POWER;
 561                 break;
 562         case WM8350_LDO_2:
 563                 volt_reg = WM8350_LDO2_LOW_POWER;
 564                 break;
 565         case WM8350_LDO_3:
 566                 volt_reg = WM8350_LDO3_LOW_POWER;
 567                 break;
 568         case WM8350_LDO_4:
 569                 volt_reg = WM8350_LDO4_LOW_POWER;
 570                 break;
 571         default:
 572                 return -EINVAL;
 573         }
 574
 575         sel = regulator_map_voltage_linear_range(rdev, uV, uV);
 576         if (sel < 0)
 577                 return sel;
 578
 579         /* all LDOs have same mV bits */
 580         val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_VSEL_MASK;
 581         wm8350_reg_write(wm8350, volt_reg, val | sel);
 582         return 0;
 583 }
 584
 585 static int wm8350_ldo_set_suspend_enable(struct regulator_dev *rdev)
 586 {
 587         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 588         int volt_reg, ldo = rdev_get_id(rdev);
 589         u16 val;
 590
 591         switch (ldo) {
 592         case WM8350_LDO_1:
 593                 volt_reg = WM8350_LDO1_LOW_POWER;
 594                 break;
 595         case WM8350_LDO_2:
 596                 volt_reg = WM8350_LDO2_LOW_POWER;
 597                 break;
 598         case WM8350_LDO_3:
 599                 volt_reg = WM8350_LDO3_LOW_POWER;
 600                 break;
 601         case WM8350_LDO_4:
 602                 volt_reg = WM8350_LDO4_LOW_POWER;
 603                 break;
 604         default:
 605                 return -EINVAL;
 606         }
 607
 608         /* all LDOs have same mV bits */
 609         val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_HIB_MODE_MASK;
 610         wm8350_reg_write(wm8350, volt_reg, val);
 611         return 0;
 612 }
 613
 614 static int wm8350_ldo_set_suspend_disable(struct regulator_dev *rdev)
 615 {
 616         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 617         int volt_reg, ldo = rdev_get_id(rdev);
 618         u16 val;
 619
 620         switch (ldo) {
 621         case WM8350_LDO_1:
 622                 volt_reg = WM8350_LDO1_LOW_POWER;
 623                 break;
 624         case WM8350_LDO_2:
 625                 volt_reg = WM8350_LDO2_LOW_POWER;
 626                 break;
 627         case WM8350_LDO_3:
 628                 volt_reg = WM8350_LDO3_LOW_POWER;
 629                 break;
 630         case WM8350_LDO_4:
 631                 volt_reg = WM8350_LDO4_LOW_POWER;
 632                 break;
 633         default:
 634                 return -EINVAL;
 635         }
 636
 637         /* all LDOs have same mV bits */
 638         val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_HIB_MODE_MASK;
 639         wm8350_reg_write(wm8350, volt_reg, val | WM8350_LDO1_HIB_MODE_DIS);
 640         return 0;
 641 }
 642
 643 int wm8350_dcdc_set_slot(struct wm8350 *wm8350, int dcdc, u16 start,
 644                          u16 stop, u16 fault)
 645 {
 646         int slot_reg;
 647         u16 val;
 648
 649         dev_dbg(wm8350->dev, "%s %d start %d stop %d\n",
 650                 __func__, dcdc, start, stop);
 651
 652         /* slot valid ? */
 653         if (start > 15 || stop > 15)
 654                 return -EINVAL;
 655
 656         switch (dcdc) {
 657         case WM8350_DCDC_1:
 658                 slot_reg = WM8350_DCDC1_TIMEOUTS;
 659                 break;
 660         case WM8350_DCDC_2:
 661                 slot_reg = WM8350_DCDC2_TIMEOUTS;
 662                 break;
 663         case WM8350_DCDC_3:
 664                 slot_reg = WM8350_DCDC3_TIMEOUTS;
 665                 break;
 666         case WM8350_DCDC_4:
 667                 slot_reg = WM8350_DCDC4_TIMEOUTS;
 668                 break;
 669         case WM8350_DCDC_5:
 670                 slot_reg = WM8350_DCDC5_TIMEOUTS;
 671                 break;
 672         case WM8350_DCDC_6:
 673                 slot_reg = WM8350_DCDC6_TIMEOUTS;
 674                 break;
 675         default:
 676                 return -EINVAL;
 677         }
 678
 679         val = wm8350_reg_read(wm8350, slot_reg) &
 680             ~(WM8350_DC1_ENSLOT_MASK | WM8350_DC1_SDSLOT_MASK |
 681               WM8350_DC1_ERRACT_MASK);
 682         wm8350_reg_write(wm8350, slot_reg,
 683                          val | (start << WM8350_DC1_ENSLOT_SHIFT) |
 684                          (stop << WM8350_DC1_SDSLOT_SHIFT) |
 685                          (fault << WM8350_DC1_ERRACT_SHIFT));
 686
 687         return 0;
 688 }
 689 EXPORT_SYMBOL_GPL(wm8350_dcdc_set_slot);
 690
 691 int wm8350_ldo_set_slot(struct wm8350 *wm8350, int ldo, u16 start, u16 stop)
 692 {
 693         int slot_reg;
 694         u16 val;
 695
 696         dev_dbg(wm8350->dev, "%s %d start %d stop %d\n",
 697                 __func__, ldo, start, stop);
 698
 699         /* slot valid ? */
 700         if (start > 15 || stop > 15)
 701                 return -EINVAL;
 702
 703         switch (ldo) {
 704         case WM8350_LDO_1:
 705                 slot_reg = WM8350_LDO1_TIMEOUTS;
 706                 break;
 707         case WM8350_LDO_2:
 708                 slot_reg = WM8350_LDO2_TIMEOUTS;
 709                 break;
 710         case WM8350_LDO_3:
 711                 slot_reg = WM8350_LDO3_TIMEOUTS;
 712                 break;
 713         case WM8350_LDO_4:
 714                 slot_reg = WM8350_LDO4_TIMEOUTS;
 715                 break;
 716         default:
 717                 return -EINVAL;
 718         }
 719
 720         val = wm8350_reg_read(wm8350, slot_reg) & ~WM8350_LDO1_SDSLOT_MASK;
 721         wm8350_reg_write(wm8350, slot_reg, val | ((start << 10) | (stop << 6)));
 722         return 0;
 723 }
 724 EXPORT_SYMBOL_GPL(wm8350_ldo_set_slot);
 725
 726 int wm8350_dcdc25_set_mode(struct wm8350 *wm8350, int dcdc, u16 mode,
 727                            u16 ilim, u16 ramp, u16 feedback)
 728 {
 729         u16 val;
 730
 731         dev_dbg(wm8350->dev, "%s %d mode: %s %s\n", __func__, dcdc,
 732                 mode ? "normal" : "boost", ilim ? "low" : "normal");
 733
 734         switch (dcdc) {
 735         case WM8350_DCDC_2:
 736                 val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL)
 737                     & ~(WM8350_DC2_MODE_MASK | WM8350_DC2_ILIM_MASK |
 738                         WM8350_DC2_RMP_MASK | WM8350_DC2_FBSRC_MASK);
 739                 wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val |
 740                                  (mode << WM8350_DC2_MODE_SHIFT) |
 741                                  (ilim << WM8350_DC2_ILIM_SHIFT) |
 742                                  (ramp << WM8350_DC2_RMP_SHIFT) |
 743                                  (feedback << WM8350_DC2_FBSRC_SHIFT));
 744                 break;
 745         case WM8350_DCDC_5:
 746                 val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL)
 747                     & ~(WM8350_DC5_MODE_MASK | WM8350_DC5_ILIM_MASK |
 748                         WM8350_DC5_RMP_MASK | WM8350_DC5_FBSRC_MASK);
 749                 wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val |
 750                                  (mode << WM8350_DC5_MODE_SHIFT) |
 751                                  (ilim << WM8350_DC5_ILIM_SHIFT) |
 752                                  (ramp << WM8350_DC5_RMP_SHIFT) |
 753                                  (feedback << WM8350_DC5_FBSRC_SHIFT));
 754                 break;
 755         default:
 756                 return -EINVAL;
 757         }
 758
 759         return 0;
 760 }
 761 EXPORT_SYMBOL_GPL(wm8350_dcdc25_set_mode);
 762
 763 static int force_continuous_enable(struct wm8350 *wm8350, int dcdc, int enable)
 764 {
 765         int reg = 0, ret;
 766
 767         switch (dcdc) {
 768         case WM8350_DCDC_1:
 769                 reg = WM8350_DCDC1_FORCE_PWM;
 770                 break;
 771         case WM8350_DCDC_3:
 772                 reg = WM8350_DCDC3_FORCE_PWM;
 773                 break;
 774         case WM8350_DCDC_4:
 775                 reg = WM8350_DCDC4_FORCE_PWM;
 776                 break;
 777         case WM8350_DCDC_6:
 778                 reg = WM8350_DCDC6_FORCE_PWM;
 779                 break;
 780         default:
 781                 return -EINVAL;
 782         }
 783
 784         if (enable)
 785                 ret = wm8350_set_bits(wm8350, reg,
 786                         WM8350_DCDC1_FORCE_PWM_ENA);
 787         else
 788                 ret = wm8350_clear_bits(wm8350, reg,
 789                         WM8350_DCDC1_FORCE_PWM_ENA);
 790         return ret;
 791 }
 792
 793 static int wm8350_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode)
 794 {
 795         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 796         int dcdc = rdev_get_id(rdev);
 797         u16 val;
 798
 799         if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6)
 800                 return -EINVAL;
 801
 802         if (dcdc == WM8350_DCDC_2 || dcdc == WM8350_DCDC_5)
 803                 return -EINVAL;
 804
 805         val = 1 << (dcdc - WM8350_DCDC_1);
 806
 807         switch (mode) {
 808         case REGULATOR_MODE_FAST:
 809                 /* force continuous mode */
 810                 wm8350_set_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val);
 811                 wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
 812                 force_continuous_enable(wm8350, dcdc, 1);
 813                 break;
 814         case REGULATOR_MODE_NORMAL:
 815                 /* active / pulse skipping */
 816                 wm8350_set_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val);
 817                 wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
 818                 force_continuous_enable(wm8350, dcdc, 0);
 819                 break;
 820         case REGULATOR_MODE_IDLE:
 821                 /* standby mode */
 822                 force_continuous_enable(wm8350, dcdc, 0);
 823                 wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
 824                 wm8350_clear_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val);
 825                 break;
 826         case REGULATOR_MODE_STANDBY:
 827                 /* LDO mode */
 828                 force_continuous_enable(wm8350, dcdc, 0);
 829                 wm8350_set_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
 830                 break;
 831         }
 832
 833         return 0;
 834 }
 835
 836 static unsigned int wm8350_dcdc_get_mode(struct regulator_dev *rdev)
 837 {
 838         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 839         int dcdc = rdev_get_id(rdev);
 840         u16 mask, sleep, active, force;
 841         int mode = REGULATOR_MODE_NORMAL;
 842         int reg;
 843
 844         switch (dcdc) {
 845         case WM8350_DCDC_1:
 846                 reg = WM8350_DCDC1_FORCE_PWM;
 847                 break;
 848         case WM8350_DCDC_3:
 849                 reg = WM8350_DCDC3_FORCE_PWM;
 850                 break;
 851         case WM8350_DCDC_4:
 852                 reg = WM8350_DCDC4_FORCE_PWM;
 853                 break;
 854         case WM8350_DCDC_6:
 855                 reg = WM8350_DCDC6_FORCE_PWM;
 856                 break;
 857         default:
 858                 return -EINVAL;
 859         }
 860
 861         mask = 1 << (dcdc - WM8350_DCDC_1);
 862         active = wm8350_reg_read(wm8350, WM8350_DCDC_ACTIVE_OPTIONS) & mask;
 863         force = wm8350_reg_read(wm8350, reg) & WM8350_DCDC1_FORCE_PWM_ENA;
 864         sleep = wm8350_reg_read(wm8350, WM8350_DCDC_SLEEP_OPTIONS) & mask;
 865
 866         dev_dbg(wm8350->dev, "mask %x active %x sleep %x force %x",
 867                 mask, active, sleep, force);
 868
 869         if (active && !sleep) {
 870                 if (force)
 871                         mode = REGULATOR_MODE_FAST;
 872                 else
 873                         mode = REGULATOR_MODE_NORMAL;
 874         } else if (!active && !sleep)
 875                 mode = REGULATOR_MODE_IDLE;
 876         else if (sleep)
 877                 mode = REGULATOR_MODE_STANDBY;
 878
 879         return mode;
 880 }
 881
 882 static unsigned int wm8350_ldo_get_mode(struct regulator_dev *rdev)
 883 {
 884         return REGULATOR_MODE_NORMAL;
 885 }
 886
 887 struct wm8350_dcdc_efficiency {
 888         int uA_load_min;
 889         int uA_load_max;
 890         unsigned int mode;
 891 };
 892
 893 static const struct wm8350_dcdc_efficiency dcdc1_6_efficiency[] = {
 894         {0, 10000, REGULATOR_MODE_STANDBY},       /* 0 - 10mA - LDO */
 895         {10000, 100000, REGULATOR_MODE_IDLE},     /* 10mA - 100mA - Standby */
 896         {100000, 1000000, REGULATOR_MODE_NORMAL}, /* > 100mA - Active */
 897         {-1, -1, REGULATOR_MODE_NORMAL},
 898 };
 899
 900 static const struct wm8350_dcdc_efficiency dcdc3_4_efficiency[] = {
 901         {0, 10000, REGULATOR_MODE_STANDBY},      /* 0 - 10mA - LDO */
 902         {10000, 100000, REGULATOR_MODE_IDLE},    /* 10mA - 100mA - Standby */
 903         {100000, 800000, REGULATOR_MODE_NORMAL}, /* > 100mA - Active */
 904         {-1, -1, REGULATOR_MODE_NORMAL},
 905 };
 906
 907 static unsigned int get_mode(int uA, const struct wm8350_dcdc_efficiency *eff)
 908 {
 909         int i = 0;
 910
 911         while (eff[i].uA_load_min != -1) {
 912                 if (uA >= eff[i].uA_load_min && uA <= eff[i].uA_load_max)
 913                         return eff[i].mode;
 914         }
 915         return REGULATOR_MODE_NORMAL;
 916 }
 917
 918 /* Query the regulator for it's most efficient mode @ uV,uA
 919  * WM8350 regulator efficiency is pretty similar over
 920  * different input and output uV.
 921  */
 922 static unsigned int wm8350_dcdc_get_optimum_mode(struct regulator_dev *rdev,
 923                                                  int input_uV, int output_uV,
 924                                                  int output_uA)
 925 {
 926         int dcdc = rdev_get_id(rdev), mode;
 927
 928         switch (dcdc) {
 929         case WM8350_DCDC_1:
 930         case WM8350_DCDC_6:
 931                 mode = get_mode(output_uA, dcdc1_6_efficiency);
 932                 break;
 933         case WM8350_DCDC_3:
 934         case WM8350_DCDC_4:
 935                 mode = get_mode(output_uA, dcdc3_4_efficiency);
 936                 break;
 937         default:
 938                 mode = REGULATOR_MODE_NORMAL;
 939                 break;
 940         }
 941         return mode;
 942 }
 943
 944 static const struct regulator_ops wm8350_dcdc_ops = {
 945         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 946         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 947         .list_voltage = regulator_list_voltage_linear,
 948         .map_voltage = regulator_map_voltage_linear,
 949         .enable = regulator_enable_regmap,
 950         .disable = regulator_disable_regmap,
 951         .is_enabled = regulator_is_enabled_regmap,
 952         .get_mode = wm8350_dcdc_get_mode,
 953         .set_mode = wm8350_dcdc_set_mode,
 954         .get_optimum_mode = wm8350_dcdc_get_optimum_mode,
 955         .set_suspend_voltage = wm8350_dcdc_set_suspend_voltage,
 956         .set_suspend_enable = wm8350_dcdc_set_suspend_enable,
 957         .set_suspend_disable = wm8350_dcdc_set_suspend_disable,
 958         .set_suspend_mode = wm8350_dcdc_set_suspend_mode,
 959 };
 960
 961 static const struct regulator_ops wm8350_dcdc2_5_ops = {
 962         .enable = regulator_enable_regmap,
 963         .disable = regulator_disable_regmap,
 964         .is_enabled = regulator_is_enabled_regmap,
 965         .set_suspend_enable = wm8350_dcdc25_set_suspend_enable,
 966         .set_suspend_disable = wm8350_dcdc25_set_suspend_disable,
 967 };
 968
 969 static const struct regulator_ops wm8350_ldo_ops = {
 970         .map_voltage = regulator_map_voltage_linear_range,
 971         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 972         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 973         .list_voltage = regulator_list_voltage_linear_range,
 974         .enable = regulator_enable_regmap,
 975         .disable = regulator_disable_regmap,
 976         .is_enabled = regulator_is_enabled_regmap,
 977         .get_mode = wm8350_ldo_get_mode,
 978         .set_suspend_voltage = wm8350_ldo_set_suspend_voltage,
 979         .set_suspend_enable = wm8350_ldo_set_suspend_enable,
 980         .set_suspend_disable = wm8350_ldo_set_suspend_disable,
 981 };
 982
 983 static const struct regulator_ops wm8350_isink_ops = {
 984         .set_current_limit = wm8350_isink_set_current,
 985         .get_current_limit = wm8350_isink_get_current,
 986         .enable = wm8350_isink_enable,
 987         .disable = wm8350_isink_disable,
 988         .is_enabled = wm8350_isink_is_enabled,
 989         .enable_time = wm8350_isink_enable_time,
 990 };
 991
 992 static const struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
 993         {
 994                 .name = "DCDC1",
 995                 .id = WM8350_DCDC_1,
 996                 .ops = &wm8350_dcdc_ops,
 997                 .irq = WM8350_IRQ_UV_DC1,
 998                 .type = REGULATOR_VOLTAGE,
 999                 .n_voltages = WM8350_DCDC_MAX_VSEL + 1,
1000                 .min_uV = 850000,
1001                 .uV_step = 25000,
1002                 .vsel_reg = WM8350_DCDC1_CONTROL,
1003                 .vsel_mask = WM8350_DC1_VSEL_MASK,
1004                 .enable_reg = WM8350_DCDC_LDO_REQUESTED,
1005                 .enable_mask = WM8350_DC1_ENA,
1006                 .owner = THIS_MODULE,
1007         },
1008         {
1009                 .name = "DCDC2",
1010                 .id = WM8350_DCDC_2,
1011                 .ops = &wm8350_dcdc2_5_ops,
1012                 .irq = WM8350_IRQ_UV_DC2,
1013                 .type = REGULATOR_VOLTAGE,
1014                 .enable_reg = WM8350_DCDC_LDO_REQUESTED,
1015                 .enable_mask = WM8350_DC2_ENA,
1016                 .owner = THIS_MODULE,
1017         },
1018         {
1019                 .name = "DCDC3",
1020                 .id = WM8350_DCDC_3,
1021                 .ops = &wm8350_dcdc_ops,
1022                 .irq = WM8350_IRQ_UV_DC3,
1023                 .type = REGULATOR_VOLTAGE,
1024                 .n_voltages = WM8350_DCDC_MAX_VSEL + 1,
1025                 .min_uV = 850000,
1026                 .uV_step = 25000,
1027                 .vsel_reg = WM8350_DCDC3_CONTROL,
1028                 .vsel_mask = WM8350_DC3_VSEL_MASK,
1029                 .enable_reg = WM8350_DCDC_LDO_REQUESTED,
1030                 .enable_mask = WM8350_DC3_ENA,
1031                 .owner = THIS_MODULE,
1032         },
1033         {
1034                 .name = "DCDC4",
1035                 .id = WM8350_DCDC_4,
1036                 .ops = &wm8350_dcdc_ops,
1037                 .irq = WM8350_IRQ_UV_DC4,
1038                 .type = REGULATOR_VOLTAGE,
1039                 .n_voltages = WM8350_DCDC_MAX_VSEL + 1,
1040                 .min_uV = 850000,
1041                 .uV_step = 25000,
1042                 .vsel_reg = WM8350_DCDC4_CONTROL,
1043                 .vsel_mask = WM8350_DC4_VSEL_MASK,
1044                 .enable_reg = WM8350_DCDC_LDO_REQUESTED,
1045                 .enable_mask = WM8350_DC4_ENA,
1046                 .owner = THIS_MODULE,
1047         },
1048         {
1049                 .name = "DCDC5",
1050                 .id = WM8350_DCDC_5,
1051                 .ops = &wm8350_dcdc2_5_ops,
1052                 .irq = WM8350_IRQ_UV_DC5,
1053                 .type = REGULATOR_VOLTAGE,
1054                 .enable_reg = WM8350_DCDC_LDO_REQUESTED,
1055                 .enable_mask = WM8350_DC5_ENA,
1056                 .owner = THIS_MODULE,
1057          },
1058         {
1059                 .name = "DCDC6",
1060                 .id = WM8350_DCDC_6,
1061                 .ops = &wm8350_dcdc_ops,
1062                 .irq = WM8350_IRQ_UV_DC6,
1063                 .type = REGULATOR_VOLTAGE,
1064                 .n_voltages = WM8350_DCDC_MAX_VSEL + 1,
1065                 .min_uV = 850000,
1066                 .uV_step = 25000,
1067                 .vsel_reg = WM8350_DCDC6_CONTROL,
1068                 .vsel_mask = WM8350_DC6_VSEL_MASK,
1069                 .enable_reg = WM8350_DCDC_LDO_REQUESTED,
1070                 .enable_mask = WM8350_DC6_ENA,
1071                 .owner = THIS_MODULE,
1072         },
1073         {
1074                 .name = "LDO1",
1075                 .id = WM8350_LDO_1,
1076                 .ops = &wm8350_ldo_ops,
1077                 .irq = WM8350_IRQ_UV_LDO1,
1078                 .type = REGULATOR_VOLTAGE,
1079                 .n_voltages = WM8350_LDO1_VSEL_MASK + 1,
1080                 .linear_ranges = wm8350_ldo_ranges,
1081                 .n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
1082                 .vsel_reg = WM8350_LDO1_CONTROL,
1083                 .vsel_mask = WM8350_LDO1_VSEL_MASK,
1084                 .enable_reg = WM8350_DCDC_LDO_REQUESTED,
1085                 .enable_mask = WM8350_LDO1_ENA,
1086                 .owner = THIS_MODULE,
1087         },
1088         {
1089                 .name = "LDO2",
1090                 .id = WM8350_LDO_2,
1091                 .ops = &wm8350_ldo_ops,
1092                 .irq = WM8350_IRQ_UV_LDO2,
1093                 .type = REGULATOR_VOLTAGE,
1094                 .n_voltages = WM8350_LDO2_VSEL_MASK + 1,
1095                 .linear_ranges = wm8350_ldo_ranges,
1096                 .n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
1097                 .vsel_reg = WM8350_LDO2_CONTROL,
1098                 .vsel_mask = WM8350_LDO2_VSEL_MASK,
1099                 .enable_reg = WM8350_DCDC_LDO_REQUESTED,
1100                 .enable_mask = WM8350_LDO2_ENA,
1101                 .owner = THIS_MODULE,
1102         },
1103         {
1104                 .name = "LDO3",
1105                 .id = WM8350_LDO_3,
1106                 .ops = &wm8350_ldo_ops,
1107                 .irq = WM8350_IRQ_UV_LDO3,
1108                 .type = REGULATOR_VOLTAGE,
1109                 .n_voltages = WM8350_LDO3_VSEL_MASK + 1,
1110                 .linear_ranges = wm8350_ldo_ranges,
1111                 .n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
1112                 .vsel_reg = WM8350_LDO3_CONTROL,
1113                 .vsel_mask = WM8350_LDO3_VSEL_MASK,
1114                 .enable_reg = WM8350_DCDC_LDO_REQUESTED,
1115                 .enable_mask = WM8350_LDO3_ENA,
1116                 .owner = THIS_MODULE,
1117         },
1118         {
1119                 .name = "LDO4",
1120                 .id = WM8350_LDO_4,
1121                 .ops = &wm8350_ldo_ops,
1122                 .irq = WM8350_IRQ_UV_LDO4,
1123                 .type = REGULATOR_VOLTAGE,
1124                 .n_voltages = WM8350_LDO4_VSEL_MASK + 1,
1125                 .linear_ranges = wm8350_ldo_ranges,
1126                 .n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
1127                 .vsel_reg = WM8350_LDO4_CONTROL,
1128                 .vsel_mask = WM8350_LDO4_VSEL_MASK,
1129                 .enable_reg = WM8350_DCDC_LDO_REQUESTED,
1130                 .enable_mask = WM8350_LDO4_ENA,
1131                 .owner = THIS_MODULE,
1132         },
1133         {
1134                 .name = "ISINKA",
1135                 .id = WM8350_ISINK_A,
1136                 .ops = &wm8350_isink_ops,
1137                 .irq = WM8350_IRQ_CS1,
1138                 .type = REGULATOR_CURRENT,
1139                 .owner = THIS_MODULE,
1140          },
1141         {
1142                 .name = "ISINKB",
1143                 .id = WM8350_ISINK_B,
1144                 .ops = &wm8350_isink_ops,
1145                 .irq = WM8350_IRQ_CS2,
1146                 .type = REGULATOR_CURRENT,
1147                 .owner = THIS_MODULE,
1148          },
1149 };
1150
1151 static irqreturn_t pmic_uv_handler(int irq, void *data)
1152 {
1153         struct regulator_dev *rdev = (struct regulator_dev *)data;
1154
1155         mutex_lock(&rdev->mutex);
1156         if (irq == WM8350_IRQ_CS1 || irq == WM8350_IRQ_CS2)
1157                 regulator_notifier_call_chain(rdev,
1158                                               REGULATOR_EVENT_REGULATION_OUT,
1159                                               NULL);
1160         else
1161                 regulator_notifier_call_chain(rdev,
1162                                               REGULATOR_EVENT_UNDER_VOLTAGE,
1163                                               NULL);
1164         mutex_unlock(&rdev->mutex);
1165
1166         return IRQ_HANDLED;
1167 }
1168
1169 static int wm8350_regulator_probe(struct platform_device *pdev)
1170 {
1171         struct wm8350 *wm8350 = dev_get_drvdata(&pdev->dev);
1172         struct regulator_config config = { };
1173         struct regulator_dev *rdev;
1174         int ret;
1175         u16 val;
1176
1177         if (pdev->id < WM8350_DCDC_1 || pdev->id > WM8350_ISINK_B)
1178                 return -ENODEV;
1179
1180         /* do any regulatior specific init */
1181         switch (pdev->id) {
1182         case WM8350_DCDC_1:
1183                 val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER);
1184                 wm8350->pmic.dcdc1_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
1185                 break;
1186         case WM8350_DCDC_3:
1187                 val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER);
1188                 wm8350->pmic.dcdc3_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
1189                 break;
1190         case WM8350_DCDC_4:
1191                 val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER);
1192                 wm8350->pmic.dcdc4_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
1193                 break;
1194         case WM8350_DCDC_6:
1195                 val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER);
1196                 wm8350->pmic.dcdc6_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
1197                 break;
1198         }
1199
1200         config.dev = &pdev->dev;
1201         config.init_data = dev_get_platdata(&pdev->dev);
1202         config.driver_data = dev_get_drvdata(&pdev->dev);
1203         config.regmap = wm8350->regmap;
1204
1205         /* register regulator */
1206         rdev = devm_regulator_register(&pdev->dev, &wm8350_reg[pdev->id],
1207                                        &config);
1208         if (IS_ERR(rdev)) {
1209                 dev_err(&pdev->dev, "failed to register %s\n",
1210                         wm8350_reg[pdev->id].name);
1211                 return PTR_ERR(rdev);
1212         }
1213
1214         /* register regulator IRQ */
1215         ret = wm8350_register_irq(wm8350, wm8350_reg[pdev->id].irq,
1216                                   pmic_uv_handler, 0, "UV", rdev);
1217         if (ret < 0) {
1218                 dev_err(&pdev->dev, "failed to register regulator %s IRQ\n",
1219                         wm8350_reg[pdev->id].name);
1220                 return ret;
1221         }
1222
1223         return 0;
1224 }
1225
1226 static int wm8350_regulator_remove(struct platform_device *pdev)
1227 {
1228         struct regulator_dev *rdev = platform_get_drvdata(pdev);
1229         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
1230
1231         wm8350_free_irq(wm8350, wm8350_reg[pdev->id].irq, rdev);
1232
1233         return 0;
1234 }
1235
1236 int wm8350_register_regulator(struct wm8350 *wm8350, int reg,
1237                               struct regulator_init_data *initdata)
1238 {
1239         struct platform_device *pdev;
1240         int ret;
1241         if (reg < 0 || reg >= NUM_WM8350_REGULATORS)
1242                 return -EINVAL;
1243
1244         if (wm8350->pmic.pdev[reg])
1245                 return -EBUSY;
1246
1247         if (reg >= WM8350_DCDC_1 && reg <= WM8350_DCDC_6 &&
1248             reg > wm8350->pmic.max_dcdc)
1249                 return -ENODEV;
1250         if (reg >= WM8350_ISINK_A && reg <= WM8350_ISINK_B &&
1251             reg > wm8350->pmic.max_isink)
1252                 return -ENODEV;
1253
1254         pdev = platform_device_alloc("wm8350-regulator", reg);
1255         if (!pdev)
1256                 return -ENOMEM;
1257
1258         wm8350->pmic.pdev[reg] = pdev;
1259
1260         initdata->driver_data = wm8350;
1261
1262         pdev->dev.platform_data = initdata;
1263         pdev->dev.parent = wm8350->dev;
1264         platform_set_drvdata(pdev, wm8350);
1265
1266         ret = platform_device_add(pdev);
1267
1268         if (ret != 0) {
1269                 dev_err(wm8350->dev, "Failed to register regulator %d: %d\n",
1270                         reg, ret);
1271                 platform_device_put(pdev);
1272                 wm8350->pmic.pdev[reg] = NULL;
1273         }
1274
1275         return ret;
1276 }
1277 EXPORT_SYMBOL_GPL(wm8350_register_regulator);
1278
1279 /**
1280  * wm8350_register_led - Register a WM8350 LED output
1281  *
1282  * @param wm8350 The WM8350 device to configure.
1283  * @param lednum LED device index to create.
1284  * @param dcdc The DCDC to use for the LED.
1285  * @param isink The ISINK to use for the LED.
1286  * @param pdata Configuration for the LED.
1287  *
1288  * The WM8350 supports the use of an ISINK together with a DCDC to
1289  * provide a power-efficient LED driver.  This function registers the
1290  * regulators and instantiates the platform device for a LED.  The
1291  * operating modes for the LED regulators must be configured using
1292  * wm8350_isink_set_flash(), wm8350_dcdc25_set_mode() and
1293  * wm8350_dcdc_set_slot() prior to calling this function.
1294  */
1295 int wm8350_register_led(struct wm8350 *wm8350, int lednum, int dcdc, int isink,
1296                         struct wm8350_led_platform_data *pdata)
1297 {
1298         struct wm8350_led *led;
1299         struct platform_device *pdev;
1300         int ret;
1301
1302         if (lednum >= ARRAY_SIZE(wm8350->pmic.led) || lednum < 0) {
1303                 dev_err(wm8350->dev, "Invalid LED index %d\n", lednum);
1304                 return -ENODEV;
1305         }
1306
1307         led = &wm8350->pmic.led[lednum];
1308
1309         if (led->pdev) {
1310                 dev_err(wm8350->dev, "LED %d already allocated\n", lednum);
1311                 return -EINVAL;
1312         }
1313
1314         pdev = platform_device_alloc("wm8350-led", lednum);
1315         if (pdev == NULL) {
1316                 dev_err(wm8350->dev, "Failed to allocate LED %d\n", lednum);
1317                 return -ENOMEM;
1318         }
1319
1320         led->isink_consumer.dev_name = dev_name(&pdev->dev);
1321         led->isink_consumer.supply = "led_isink";
1322         led->isink_init.num_consumer_supplies = 1;
1323         led->isink_init.consumer_supplies = &led->isink_consumer;
1324         led->isink_init.constraints.min_uA = 0;
1325         led->isink_init.constraints.max_uA = pdata->max_uA;
1326         led->isink_init.constraints.valid_ops_mask
1327                 = REGULATOR_CHANGE_CURRENT | REGULATOR_CHANGE_STATUS;
1328         led->isink_init.constraints.valid_modes_mask = REGULATOR_MODE_NORMAL;
1329         ret = wm8350_register_regulator(wm8350, isink, &led->isink_init);
1330         if (ret != 0) {
1331                 platform_device_put(pdev);
1332                 return ret;
1333         }
1334
1335         led->dcdc_consumer.dev_name = dev_name(&pdev->dev);
1336         led->dcdc_consumer.supply = "led_vcc";
1337         led->dcdc_init.num_consumer_supplies = 1;
1338         led->dcdc_init.consumer_supplies = &led->dcdc_consumer;
1339         led->dcdc_init.constraints.valid_modes_mask = REGULATOR_MODE_NORMAL;
1340         led->dcdc_init.constraints.valid_ops_mask =  REGULATOR_CHANGE_STATUS;
1341         ret = wm8350_register_regulator(wm8350, dcdc, &led->dcdc_init);
1342         if (ret != 0) {
1343                 platform_device_put(pdev);
1344                 return ret;
1345         }
1346
1347         switch (isink) {
1348         case WM8350_ISINK_A:
1349                 wm8350->pmic.isink_A_dcdc = dcdc;
1350                 break;
1351         case WM8350_ISINK_B:
1352                 wm8350->pmic.isink_B_dcdc = dcdc;
1353                 break;
1354         }
1355
1356         pdev->dev.platform_data = pdata;
1357         pdev->dev.parent = wm8350->dev;
1358         ret = platform_device_add(pdev);
1359         if (ret != 0) {
1360                 dev_err(wm8350->dev, "Failed to register LED %d: %d\n",
1361                         lednum, ret);
1362                 platform_device_put(pdev);
1363                 return ret;
1364         }
1365
1366         led->pdev = pdev;
1367
1368         return 0;
1369 }
1370 EXPORT_SYMBOL_GPL(wm8350_register_led);
1371
1372 static struct platform_driver wm8350_regulator_driver = {
1373         .probe = wm8350_regulator_probe,
1374         .remove = wm8350_regulator_remove,
1375         .driver         = {
1376                 .name   = "wm8350-regulator",
1377         },
1378 };
1379
1380 static int __init wm8350_regulator_init(void)
1381 {
1382         return platform_driver_register(&wm8350_regulator_driver);
1383 }
1384 subsys_initcall(wm8350_regulator_init);
1385
1386 static void __exit wm8350_regulator_exit(void)
1387 {
1388         platform_driver_unregister(&wm8350_regulator_driver);
1389 }
1390 module_exit(wm8350_regulator_exit);
1391
1392 /* Module information */
1393 MODULE_AUTHOR("Liam Girdwood");
1394 MODULE_DESCRIPTION("WM8350 voltage and current regulator driver");
1395 MODULE_LICENSE("GPL");
1396 MODULE_ALIAS("platform:wm8350-regulator");