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 = ARRAY_SIZE(isink_cur) - 1; i >= 0; 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 inline int wm8350_ldo_val_to_mvolts(unsigned int val)
 112 {
 113         if (val < 16)
 114                 return (val * 50) + 900;
 115         else
 116                 return ((val - 16) * 100) + 1800;
 117
 118 }
 119
 120 static inline unsigned int wm8350_ldo_mvolts_to_val(int mV)
 121 {
 122         if (mV < 1800)
 123                 return (mV - 900) / 50;
 124         else
 125                 return ((mV - 1800) / 100) + 16;
 126 }
 127
 128 static inline int wm8350_dcdc_val_to_mvolts(unsigned int val)
 129 {
 130         return (val * 25) + 850;
 131 }
 132
 133 static inline unsigned int wm8350_dcdc_mvolts_to_val(int mV)
 134 {
 135         return (mV - 850) / 25;
 136 }
 137
 138 static int wm8350_isink_set_current(struct regulator_dev *rdev, int min_uA,
 139         int max_uA)
 140 {
 141         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 142         int isink = rdev_get_id(rdev);
 143         u16 val, setting;
 144         int ret;
 145
 146         ret = get_isink_val(min_uA, max_uA, &setting);
 147         if (ret != 0)
 148                 return ret;
 149
 150         switch (isink) {
 151         case WM8350_ISINK_A:
 152                 val = wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_A) &
 153                     ~WM8350_CS1_ISEL_MASK;
 154                 wm8350_reg_write(wm8350, WM8350_CURRENT_SINK_DRIVER_A,
 155                                  val | setting);
 156                 break;
 157         case WM8350_ISINK_B:
 158                 val = wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_B) &
 159                     ~WM8350_CS1_ISEL_MASK;
 160                 wm8350_reg_write(wm8350, WM8350_CURRENT_SINK_DRIVER_B,
 161                                  val | setting);
 162                 break;
 163         default:
 164                 return -EINVAL;
 165         }
 166
 167         return 0;
 168 }
 169
 170 static int wm8350_isink_get_current(struct regulator_dev *rdev)
 171 {
 172         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 173         int isink = rdev_get_id(rdev);
 174         u16 val;
 175
 176         switch (isink) {
 177         case WM8350_ISINK_A:
 178                 val = wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_A) &
 179                     WM8350_CS1_ISEL_MASK;
 180                 break;
 181         case WM8350_ISINK_B:
 182                 val = wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_B) &
 183                     WM8350_CS1_ISEL_MASK;
 184                 break;
 185         default:
 186                 return 0;
 187         }
 188
 189         return (isink_cur[val] + 50) / 100;
 190 }
 191
 192 /* turn on ISINK followed by DCDC */
 193 static int wm8350_isink_enable(struct regulator_dev *rdev)
 194 {
 195         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 196         int isink = rdev_get_id(rdev);
 197
 198         switch (isink) {
 199         case WM8350_ISINK_A:
 200                 switch (wm8350->pmic.isink_A_dcdc) {
 201                 case WM8350_DCDC_2:
 202                 case WM8350_DCDC_5:
 203                         wm8350_set_bits(wm8350, WM8350_POWER_MGMT_7,
 204                                         WM8350_CS1_ENA);
 205                         wm8350_set_bits(wm8350, WM8350_CSA_FLASH_CONTROL,
 206                                         WM8350_CS1_DRIVE);
 207                         wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
 208                                         1 << (wm8350->pmic.isink_A_dcdc -
 209                                               WM8350_DCDC_1));
 210                         break;
 211                 default:
 212                         return -EINVAL;
 213                 }
 214                 break;
 215         case WM8350_ISINK_B:
 216                 switch (wm8350->pmic.isink_B_dcdc) {
 217                 case WM8350_DCDC_2:
 218                 case WM8350_DCDC_5:
 219                         wm8350_set_bits(wm8350, WM8350_POWER_MGMT_7,
 220                                         WM8350_CS2_ENA);
 221                         wm8350_set_bits(wm8350, WM8350_CSB_FLASH_CONTROL,
 222                                         WM8350_CS2_DRIVE);
 223                         wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
 224                                         1 << (wm8350->pmic.isink_B_dcdc -
 225                                               WM8350_DCDC_1));
 226                         break;
 227                 default:
 228                         return -EINVAL;
 229                 }
 230                 break;
 231         default:
 232                 return -EINVAL;
 233         }
 234         return 0;
 235 }
 236
 237 static int wm8350_isink_disable(struct regulator_dev *rdev)
 238 {
 239         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 240         int isink = rdev_get_id(rdev);
 241
 242         switch (isink) {
 243         case WM8350_ISINK_A:
 244                 switch (wm8350->pmic.isink_A_dcdc) {
 245                 case WM8350_DCDC_2:
 246                 case WM8350_DCDC_5:
 247                         wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
 248                                           1 << (wm8350->pmic.isink_A_dcdc -
 249                                                 WM8350_DCDC_1));
 250                         wm8350_clear_bits(wm8350, WM8350_POWER_MGMT_7,
 251                                           WM8350_CS1_ENA);
 252                         break;
 253                 default:
 254                         return -EINVAL;
 255                 }
 256                 break;
 257         case WM8350_ISINK_B:
 258                 switch (wm8350->pmic.isink_B_dcdc) {
 259                 case WM8350_DCDC_2:
 260                 case WM8350_DCDC_5:
 261                         wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
 262                                           1 << (wm8350->pmic.isink_B_dcdc -
 263                                                 WM8350_DCDC_1));
 264                         wm8350_clear_bits(wm8350, WM8350_POWER_MGMT_7,
 265                                           WM8350_CS2_ENA);
 266                         break;
 267                 default:
 268                         return -EINVAL;
 269                 }
 270                 break;
 271         default:
 272                 return -EINVAL;
 273         }
 274         return 0;
 275 }
 276
 277 static int wm8350_isink_is_enabled(struct regulator_dev *rdev)
 278 {
 279         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 280         int isink = rdev_get_id(rdev);
 281
 282         switch (isink) {
 283         case WM8350_ISINK_A:
 284                 return wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_A) &
 285                     0x8000;
 286         case WM8350_ISINK_B:
 287                 return wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_B) &
 288                     0x8000;
 289         }
 290         return -EINVAL;
 291 }
 292
 293 static int wm8350_isink_enable_time(struct regulator_dev *rdev)
 294 {
 295         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 296         int isink = rdev_get_id(rdev);
 297         int reg;
 298
 299         switch (isink) {
 300         case WM8350_ISINK_A:
 301                 reg = wm8350_reg_read(wm8350, WM8350_CSA_FLASH_CONTROL);
 302                 break;
 303         case WM8350_ISINK_B:
 304                 reg = wm8350_reg_read(wm8350, WM8350_CSB_FLASH_CONTROL);
 305                 break;
 306         default:
 307                 return -EINVAL;
 308         }
 309
 310         if (reg & WM8350_CS1_FLASH_MODE) {
 311                 switch (reg & WM8350_CS1_ON_RAMP_MASK) {
 312                 case 0:
 313                         return 0;
 314                 case 1:
 315                         return 1950;
 316                 case 2:
 317                         return 3910;
 318                 case 3:
 319                         return 7800;
 320                 }
 321         } else {
 322                 switch (reg & WM8350_CS1_ON_RAMP_MASK) {
 323                 case 0:
 324                         return 0;
 325                 case 1:
 326                         return 250000;
 327                 case 2:
 328                         return 500000;
 329                 case 3:
 330                         return 1000000;
 331                 }
 332         }
 333
 334         return -EINVAL;
 335 }
 336
 337
 338 int wm8350_isink_set_flash(struct wm8350 *wm8350, int isink, u16 mode,
 339                            u16 trigger, u16 duration, u16 on_ramp, u16 off_ramp,
 340                            u16 drive)
 341 {
 342         switch (isink) {
 343         case WM8350_ISINK_A:
 344                 wm8350_reg_write(wm8350, WM8350_CSA_FLASH_CONTROL,
 345                                  (mode ? WM8350_CS1_FLASH_MODE : 0) |
 346                                  (trigger ? WM8350_CS1_TRIGSRC : 0) |
 347                                  duration | on_ramp | off_ramp | drive);
 348                 break;
 349         case WM8350_ISINK_B:
 350                 wm8350_reg_write(wm8350, WM8350_CSB_FLASH_CONTROL,
 351                                  (mode ? WM8350_CS2_FLASH_MODE : 0) |
 352                                  (trigger ? WM8350_CS2_TRIGSRC : 0) |
 353                                  duration | on_ramp | off_ramp | drive);
 354                 break;
 355         default:
 356                 return -EINVAL;
 357         }
 358         return 0;
 359 }
 360 EXPORT_SYMBOL_GPL(wm8350_isink_set_flash);
 361
 362 static int wm8350_dcdc_set_voltage(struct regulator_dev *rdev, int min_uV,
 363                                    int max_uV, unsigned *selector)
 364 {
 365         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 366         int volt_reg, dcdc = rdev_get_id(rdev), mV,
 367                 min_mV = min_uV / 1000, max_mV = max_uV / 1000;
 368         u16 val;
 369
 370         if (min_mV < 850 || min_mV > 4025)
 371                 return -EINVAL;
 372         if (max_mV < 850 || max_mV > 4025)
 373                 return -EINVAL;
 374
 375         /* step size is 25mV */
 376         mV = (min_mV - 826) / 25;
 377         if (wm8350_dcdc_val_to_mvolts(mV) > max_mV)
 378                 return -EINVAL;
 379         BUG_ON(wm8350_dcdc_val_to_mvolts(mV) < min_mV);
 380
 381         switch (dcdc) {
 382         case WM8350_DCDC_1:
 383                 volt_reg = WM8350_DCDC1_CONTROL;
 384                 break;
 385         case WM8350_DCDC_3:
 386                 volt_reg = WM8350_DCDC3_CONTROL;
 387                 break;
 388         case WM8350_DCDC_4:
 389                 volt_reg = WM8350_DCDC4_CONTROL;
 390                 break;
 391         case WM8350_DCDC_6:
 392                 volt_reg = WM8350_DCDC6_CONTROL;
 393                 break;
 394         case WM8350_DCDC_2:
 395         case WM8350_DCDC_5:
 396         default:
 397                 return -EINVAL;
 398         }
 399
 400         *selector = mV;
 401
 402         /* all DCDCs have same mV bits */
 403         val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_DC1_VSEL_MASK;
 404         wm8350_reg_write(wm8350, volt_reg, val | mV);
 405         return 0;
 406 }
 407
 408 static int wm8350_dcdc_get_voltage_sel(struct regulator_dev *rdev)
 409 {
 410         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 411         int volt_reg, dcdc = rdev_get_id(rdev);
 412
 413         switch (dcdc) {
 414         case WM8350_DCDC_1:
 415                 volt_reg = WM8350_DCDC1_CONTROL;
 416                 break;
 417         case WM8350_DCDC_3:
 418                 volt_reg = WM8350_DCDC3_CONTROL;
 419                 break;
 420         case WM8350_DCDC_4:
 421                 volt_reg = WM8350_DCDC4_CONTROL;
 422                 break;
 423         case WM8350_DCDC_6:
 424                 volt_reg = WM8350_DCDC6_CONTROL;
 425                 break;
 426         case WM8350_DCDC_2:
 427         case WM8350_DCDC_5:
 428         default:
 429                 return -EINVAL;
 430         }
 431
 432         /* all DCDCs have same mV bits */
 433         return wm8350_reg_read(wm8350, volt_reg) & WM8350_DC1_VSEL_MASK;
 434 }
 435
 436 static int wm8350_dcdc_list_voltage(struct regulator_dev *rdev,
 437                                     unsigned selector)
 438 {
 439         if (selector > WM8350_DCDC_MAX_VSEL)
 440                 return -EINVAL;
 441         return wm8350_dcdc_val_to_mvolts(selector) * 1000;
 442 }
 443
 444 static int wm8350_dcdc_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 445 {
 446         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 447         int volt_reg, mV = uV / 1000, dcdc = rdev_get_id(rdev);
 448         u16 val;
 449
 450         dev_dbg(wm8350->dev, "%s %d mV %d\n", __func__, dcdc, mV);
 451
 452         if (mV && (mV < 850 || mV > 4025)) {
 453                 dev_err(wm8350->dev,
 454                         "DCDC%d suspend voltage %d mV out of range\n",
 455                         dcdc, mV);
 456                 return -EINVAL;
 457         }
 458         if (mV == 0)
 459                 mV = 850;
 460
 461         switch (dcdc) {
 462         case WM8350_DCDC_1:
 463                 volt_reg = WM8350_DCDC1_LOW_POWER;
 464                 break;
 465         case WM8350_DCDC_3:
 466                 volt_reg = WM8350_DCDC3_LOW_POWER;
 467                 break;
 468         case WM8350_DCDC_4:
 469                 volt_reg = WM8350_DCDC4_LOW_POWER;
 470                 break;
 471         case WM8350_DCDC_6:
 472                 volt_reg = WM8350_DCDC6_LOW_POWER;
 473                 break;
 474         case WM8350_DCDC_2:
 475         case WM8350_DCDC_5:
 476         default:
 477                 return -EINVAL;
 478         }
 479
 480         /* all DCDCs have same mV bits */
 481         val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_DC1_VSEL_MASK;
 482         wm8350_reg_write(wm8350, volt_reg,
 483                          val | wm8350_dcdc_mvolts_to_val(mV));
 484         return 0;
 485 }
 486
 487 static int wm8350_dcdc_set_suspend_enable(struct regulator_dev *rdev)
 488 {
 489         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 490         int dcdc = rdev_get_id(rdev);
 491         u16 val;
 492
 493         switch (dcdc) {
 494         case WM8350_DCDC_1:
 495                 val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER)
 496                         & ~WM8350_DCDC_HIB_MODE_MASK;
 497                 wm8350_reg_write(wm8350, WM8350_DCDC1_LOW_POWER,
 498                         wm8350->pmic.dcdc1_hib_mode);
 499                 break;
 500         case WM8350_DCDC_3:
 501                 val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER)
 502                         & ~WM8350_DCDC_HIB_MODE_MASK;
 503                 wm8350_reg_write(wm8350, WM8350_DCDC3_LOW_POWER,
 504                         wm8350->pmic.dcdc3_hib_mode);
 505                 break;
 506         case WM8350_DCDC_4:
 507                 val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER)
 508                         & ~WM8350_DCDC_HIB_MODE_MASK;
 509                 wm8350_reg_write(wm8350, WM8350_DCDC4_LOW_POWER,
 510                         wm8350->pmic.dcdc4_hib_mode);
 511                 break;
 512         case WM8350_DCDC_6:
 513                 val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER)
 514                         & ~WM8350_DCDC_HIB_MODE_MASK;
 515                 wm8350_reg_write(wm8350, WM8350_DCDC6_LOW_POWER,
 516                         wm8350->pmic.dcdc6_hib_mode);
 517                 break;
 518         case WM8350_DCDC_2:
 519         case WM8350_DCDC_5:
 520         default:
 521                 return -EINVAL;
 522         }
 523
 524         return 0;
 525 }
 526
 527 static int wm8350_dcdc_set_suspend_disable(struct regulator_dev *rdev)
 528 {
 529         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 530         int dcdc = rdev_get_id(rdev);
 531         u16 val;
 532
 533         switch (dcdc) {
 534         case WM8350_DCDC_1:
 535                 val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER);
 536                 wm8350->pmic.dcdc1_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
 537                 wm8350_reg_write(wm8350, WM8350_DCDC1_LOW_POWER,
 538                         WM8350_DCDC_HIB_MODE_DIS);
 539                 break;
 540         case WM8350_DCDC_3:
 541                 val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER);
 542                 wm8350->pmic.dcdc3_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
 543                 wm8350_reg_write(wm8350, WM8350_DCDC3_LOW_POWER,
 544                         WM8350_DCDC_HIB_MODE_DIS);
 545                 break;
 546         case WM8350_DCDC_4:
 547                 val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER);
 548                 wm8350->pmic.dcdc4_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
 549                 wm8350_reg_write(wm8350, WM8350_DCDC4_LOW_POWER,
 550                         WM8350_DCDC_HIB_MODE_DIS);
 551                 break;
 552         case WM8350_DCDC_6:
 553                 val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER);
 554                 wm8350->pmic.dcdc6_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
 555                 wm8350_reg_write(wm8350, WM8350_DCDC6_LOW_POWER,
 556                         WM8350_DCDC_HIB_MODE_DIS);
 557                 break;
 558         case WM8350_DCDC_2:
 559         case WM8350_DCDC_5:
 560         default:
 561                 return -EINVAL;
 562         }
 563
 564         return 0;
 565 }
 566
 567 static int wm8350_dcdc25_set_suspend_enable(struct regulator_dev *rdev)
 568 {
 569         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 570         int dcdc = rdev_get_id(rdev);
 571         u16 val;
 572
 573         switch (dcdc) {
 574         case WM8350_DCDC_2:
 575                 val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL)
 576                     & ~WM8350_DC2_HIB_MODE_MASK;
 577                 wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val |
 578                                  WM8350_DC2_HIB_MODE_ACTIVE);
 579                 break;
 580         case WM8350_DCDC_5:
 581                 val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL)
 582                     & ~WM8350_DC2_HIB_MODE_MASK;
 583                 wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val |
 584                                  WM8350_DC5_HIB_MODE_ACTIVE);
 585                 break;
 586         default:
 587                 return -EINVAL;
 588         }
 589         return 0;
 590 }
 591
 592 static int wm8350_dcdc25_set_suspend_disable(struct regulator_dev *rdev)
 593 {
 594         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 595         int dcdc = rdev_get_id(rdev);
 596         u16 val;
 597
 598         switch (dcdc) {
 599         case WM8350_DCDC_2:
 600                 val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL)
 601                     & ~WM8350_DC2_HIB_MODE_MASK;
 602                 wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val |
 603                                  WM8350_DC2_HIB_MODE_DISABLE);
 604                 break;
 605         case WM8350_DCDC_5:
 606                 val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL)
 607                     & ~WM8350_DC2_HIB_MODE_MASK;
 608                 wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val |
 609                                  WM8350_DC2_HIB_MODE_DISABLE);
 610                 break;
 611         default:
 612                 return -EINVAL;
 613         }
 614         return 0;
 615 }
 616
 617 static int wm8350_dcdc_set_suspend_mode(struct regulator_dev *rdev,
 618         unsigned int mode)
 619 {
 620         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 621         int dcdc = rdev_get_id(rdev);
 622         u16 *hib_mode;
 623
 624         switch (dcdc) {
 625         case WM8350_DCDC_1:
 626                 hib_mode = &wm8350->pmic.dcdc1_hib_mode;
 627                 break;
 628         case WM8350_DCDC_3:
 629                 hib_mode = &wm8350->pmic.dcdc3_hib_mode;
 630                 break;
 631         case WM8350_DCDC_4:
 632                 hib_mode = &wm8350->pmic.dcdc4_hib_mode;
 633                 break;
 634         case WM8350_DCDC_6:
 635                 hib_mode = &wm8350->pmic.dcdc6_hib_mode;
 636                 break;
 637         case WM8350_DCDC_2:
 638         case WM8350_DCDC_5:
 639         default:
 640                 return -EINVAL;
 641         }
 642
 643         switch (mode) {
 644         case REGULATOR_MODE_NORMAL:
 645                 *hib_mode = WM8350_DCDC_HIB_MODE_IMAGE;
 646                 break;
 647         case REGULATOR_MODE_IDLE:
 648                 *hib_mode = WM8350_DCDC_HIB_MODE_STANDBY;
 649                 break;
 650         case REGULATOR_MODE_STANDBY:
 651                 *hib_mode = WM8350_DCDC_HIB_MODE_LDO_IM;
 652                 break;
 653         default:
 654                 return -EINVAL;
 655         }
 656
 657         return 0;
 658 }
 659
 660 static int wm8350_ldo_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 661 {
 662         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 663         int volt_reg, mV = uV / 1000, ldo = rdev_get_id(rdev);
 664         u16 val;
 665
 666         dev_dbg(wm8350->dev, "%s %d mV %d\n", __func__, ldo, mV);
 667
 668         if (mV < 900 || mV > 3300) {
 669                 dev_err(wm8350->dev, "LDO%d voltage %d mV out of range\n",
 670                         ldo, mV);
 671                 return -EINVAL;
 672         }
 673
 674         switch (ldo) {
 675         case WM8350_LDO_1:
 676                 volt_reg = WM8350_LDO1_LOW_POWER;
 677                 break;
 678         case WM8350_LDO_2:
 679                 volt_reg = WM8350_LDO2_LOW_POWER;
 680                 break;
 681         case WM8350_LDO_3:
 682                 volt_reg = WM8350_LDO3_LOW_POWER;
 683                 break;
 684         case WM8350_LDO_4:
 685                 volt_reg = WM8350_LDO4_LOW_POWER;
 686                 break;
 687         default:
 688                 return -EINVAL;
 689         }
 690
 691         /* all LDOs have same mV bits */
 692         val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_VSEL_MASK;
 693         wm8350_reg_write(wm8350, volt_reg,
 694                          val | wm8350_ldo_mvolts_to_val(mV));
 695         return 0;
 696 }
 697
 698 static int wm8350_ldo_set_suspend_enable(struct regulator_dev *rdev)
 699 {
 700         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 701         int volt_reg, ldo = rdev_get_id(rdev);
 702         u16 val;
 703
 704         switch (ldo) {
 705         case WM8350_LDO_1:
 706                 volt_reg = WM8350_LDO1_LOW_POWER;
 707                 break;
 708         case WM8350_LDO_2:
 709                 volt_reg = WM8350_LDO2_LOW_POWER;
 710                 break;
 711         case WM8350_LDO_3:
 712                 volt_reg = WM8350_LDO3_LOW_POWER;
 713                 break;
 714         case WM8350_LDO_4:
 715                 volt_reg = WM8350_LDO4_LOW_POWER;
 716                 break;
 717         default:
 718                 return -EINVAL;
 719         }
 720
 721         /* all LDOs have same mV bits */
 722         val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_HIB_MODE_MASK;
 723         wm8350_reg_write(wm8350, volt_reg, val);
 724         return 0;
 725 }
 726
 727 static int wm8350_ldo_set_suspend_disable(struct regulator_dev *rdev)
 728 {
 729         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 730         int volt_reg, ldo = rdev_get_id(rdev);
 731         u16 val;
 732
 733         switch (ldo) {
 734         case WM8350_LDO_1:
 735                 volt_reg = WM8350_LDO1_LOW_POWER;
 736                 break;
 737         case WM8350_LDO_2:
 738                 volt_reg = WM8350_LDO2_LOW_POWER;
 739                 break;
 740         case WM8350_LDO_3:
 741                 volt_reg = WM8350_LDO3_LOW_POWER;
 742                 break;
 743         case WM8350_LDO_4:
 744                 volt_reg = WM8350_LDO4_LOW_POWER;
 745                 break;
 746         default:
 747                 return -EINVAL;
 748         }
 749
 750         /* all LDOs have same mV bits */
 751         val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_HIB_MODE_MASK;
 752         wm8350_reg_write(wm8350, volt_reg, WM8350_LDO1_HIB_MODE_DIS);
 753         return 0;
 754 }
 755
 756 static int wm8350_ldo_set_voltage(struct regulator_dev *rdev, int min_uV,
 757                                   int max_uV, unsigned *selector)
 758 {
 759         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 760         int volt_reg, ldo = rdev_get_id(rdev), mV, min_mV = min_uV / 1000,
 761                 max_mV = max_uV / 1000;
 762         u16 val;
 763
 764         if (min_mV < 900 || min_mV > 3300)
 765                 return -EINVAL;
 766         if (max_mV < 900 || max_mV > 3300)
 767                 return -EINVAL;
 768
 769         if (min_mV < 1800) {
 770                 /* step size is 50mV < 1800mV */
 771                 mV = (min_mV - 851) / 50;
 772                 if (wm8350_ldo_val_to_mvolts(mV) > max_mV)
 773                         return -EINVAL;
 774                 BUG_ON(wm8350_ldo_val_to_mvolts(mV) < min_mV);
 775         } else {
 776                 /* step size is 100mV > 1800mV */
 777                 mV = ((min_mV - 1701) / 100) + 16;
 778                 if (wm8350_ldo_val_to_mvolts(mV) > max_mV)
 779                         return -EINVAL;
 780                 BUG_ON(wm8350_ldo_val_to_mvolts(mV) < min_mV);
 781         }
 782
 783         switch (ldo) {
 784         case WM8350_LDO_1:
 785                 volt_reg = WM8350_LDO1_CONTROL;
 786                 break;
 787         case WM8350_LDO_2:
 788                 volt_reg = WM8350_LDO2_CONTROL;
 789                 break;
 790         case WM8350_LDO_3:
 791                 volt_reg = WM8350_LDO3_CONTROL;
 792                 break;
 793         case WM8350_LDO_4:
 794                 volt_reg = WM8350_LDO4_CONTROL;
 795                 break;
 796         default:
 797                 return -EINVAL;
 798         }
 799
 800         *selector = mV;
 801
 802         /* all LDOs have same mV bits */
 803         val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_VSEL_MASK;
 804         wm8350_reg_write(wm8350, volt_reg, val | mV);
 805         return 0;
 806 }
 807
 808 static int wm8350_ldo_get_voltage_sel(struct regulator_dev *rdev)
 809 {
 810         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 811         int volt_reg, ldo = rdev_get_id(rdev);
 812
 813         switch (ldo) {
 814         case WM8350_LDO_1:
 815                 volt_reg = WM8350_LDO1_CONTROL;
 816                 break;
 817         case WM8350_LDO_2:
 818                 volt_reg = WM8350_LDO2_CONTROL;
 819                 break;
 820         case WM8350_LDO_3:
 821                 volt_reg = WM8350_LDO3_CONTROL;
 822                 break;
 823         case WM8350_LDO_4:
 824                 volt_reg = WM8350_LDO4_CONTROL;
 825                 break;
 826         default:
 827                 return -EINVAL;
 828         }
 829
 830         /* all LDOs have same mV bits */
 831         return wm8350_reg_read(wm8350, volt_reg) & WM8350_LDO1_VSEL_MASK;
 832 }
 833
 834 static int wm8350_ldo_list_voltage(struct regulator_dev *rdev,
 835                                     unsigned selector)
 836 {
 837         if (selector > WM8350_LDO1_VSEL_MASK)
 838                 return -EINVAL;
 839         return wm8350_ldo_val_to_mvolts(selector) * 1000;
 840 }
 841
 842 int wm8350_dcdc_set_slot(struct wm8350 *wm8350, int dcdc, u16 start,
 843                          u16 stop, u16 fault)
 844 {
 845         int slot_reg;
 846         u16 val;
 847
 848         dev_dbg(wm8350->dev, "%s %d start %d stop %d\n",
 849                 __func__, dcdc, start, stop);
 850
 851         /* slot valid ? */
 852         if (start > 15 || stop > 15)
 853                 return -EINVAL;
 854
 855         switch (dcdc) {
 856         case WM8350_DCDC_1:
 857                 slot_reg = WM8350_DCDC1_TIMEOUTS;
 858                 break;
 859         case WM8350_DCDC_2:
 860                 slot_reg = WM8350_DCDC2_TIMEOUTS;
 861                 break;
 862         case WM8350_DCDC_3:
 863                 slot_reg = WM8350_DCDC3_TIMEOUTS;
 864                 break;
 865         case WM8350_DCDC_4:
 866                 slot_reg = WM8350_DCDC4_TIMEOUTS;
 867                 break;
 868         case WM8350_DCDC_5:
 869                 slot_reg = WM8350_DCDC5_TIMEOUTS;
 870                 break;
 871         case WM8350_DCDC_6:
 872                 slot_reg = WM8350_DCDC6_TIMEOUTS;
 873                 break;
 874         default:
 875                 return -EINVAL;
 876         }
 877
 878         val = wm8350_reg_read(wm8350, slot_reg) &
 879             ~(WM8350_DC1_ENSLOT_MASK | WM8350_DC1_SDSLOT_MASK |
 880               WM8350_DC1_ERRACT_MASK);
 881         wm8350_reg_write(wm8350, slot_reg,
 882                          val | (start << WM8350_DC1_ENSLOT_SHIFT) |
 883                          (stop << WM8350_DC1_SDSLOT_SHIFT) |
 884                          (fault << WM8350_DC1_ERRACT_SHIFT));
 885
 886         return 0;
 887 }
 888 EXPORT_SYMBOL_GPL(wm8350_dcdc_set_slot);
 889
 890 int wm8350_ldo_set_slot(struct wm8350 *wm8350, int ldo, u16 start, u16 stop)
 891 {
 892         int slot_reg;
 893         u16 val;
 894
 895         dev_dbg(wm8350->dev, "%s %d start %d stop %d\n",
 896                 __func__, ldo, start, stop);
 897
 898         /* slot valid ? */
 899         if (start > 15 || stop > 15)
 900                 return -EINVAL;
 901
 902         switch (ldo) {
 903         case WM8350_LDO_1:
 904                 slot_reg = WM8350_LDO1_TIMEOUTS;
 905                 break;
 906         case WM8350_LDO_2:
 907                 slot_reg = WM8350_LDO2_TIMEOUTS;
 908                 break;
 909         case WM8350_LDO_3:
 910                 slot_reg = WM8350_LDO3_TIMEOUTS;
 911                 break;
 912         case WM8350_LDO_4:
 913                 slot_reg = WM8350_LDO4_TIMEOUTS;
 914                 break;
 915         default:
 916                 return -EINVAL;
 917         }
 918
 919         val = wm8350_reg_read(wm8350, slot_reg) & ~WM8350_LDO1_SDSLOT_MASK;
 920         wm8350_reg_write(wm8350, slot_reg, val | ((start << 10) | (stop << 6)));
 921         return 0;
 922 }
 923 EXPORT_SYMBOL_GPL(wm8350_ldo_set_slot);
 924
 925 int wm8350_dcdc25_set_mode(struct wm8350 *wm8350, int dcdc, u16 mode,
 926                            u16 ilim, u16 ramp, u16 feedback)
 927 {
 928         u16 val;
 929
 930         dev_dbg(wm8350->dev, "%s %d mode: %s %s\n", __func__, dcdc,
 931                 mode ? "normal" : "boost", ilim ? "low" : "normal");
 932
 933         switch (dcdc) {
 934         case WM8350_DCDC_2:
 935                 val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL)
 936                     & ~(WM8350_DC2_MODE_MASK | WM8350_DC2_ILIM_MASK |
 937                         WM8350_DC2_RMP_MASK | WM8350_DC2_FBSRC_MASK);
 938                 wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val |
 939                                  (mode << WM8350_DC2_MODE_SHIFT) |
 940                                  (ilim << WM8350_DC2_ILIM_SHIFT) |
 941                                  (ramp << WM8350_DC2_RMP_SHIFT) |
 942                                  (feedback << WM8350_DC2_FBSRC_SHIFT));
 943                 break;
 944         case WM8350_DCDC_5:
 945                 val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL)
 946                     & ~(WM8350_DC5_MODE_MASK | WM8350_DC5_ILIM_MASK |
 947                         WM8350_DC5_RMP_MASK | WM8350_DC5_FBSRC_MASK);
 948                 wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val |
 949                                  (mode << WM8350_DC5_MODE_SHIFT) |
 950                                  (ilim << WM8350_DC5_ILIM_SHIFT) |
 951                                  (ramp << WM8350_DC5_RMP_SHIFT) |
 952                                  (feedback << WM8350_DC5_FBSRC_SHIFT));
 953                 break;
 954         default:
 955                 return -EINVAL;
 956         }
 957
 958         return 0;
 959 }
 960 EXPORT_SYMBOL_GPL(wm8350_dcdc25_set_mode);
 961
 962 static int wm8350_dcdc_enable(struct regulator_dev *rdev)
 963 {
 964         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 965         int dcdc = rdev_get_id(rdev);
 966         u16 shift;
 967
 968         if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6)
 969                 return -EINVAL;
 970
 971         shift = dcdc - WM8350_DCDC_1;
 972         wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 1 << shift);
 973         return 0;
 974 }
 975
 976 static int wm8350_dcdc_disable(struct regulator_dev *rdev)
 977 {
 978         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 979         int dcdc = rdev_get_id(rdev);
 980         u16 shift;
 981
 982         if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6)
 983                 return -EINVAL;
 984
 985         shift = dcdc - WM8350_DCDC_1;
 986         wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 1 << shift);
 987
 988         return 0;
 989 }
 990
 991 static int wm8350_ldo_enable(struct regulator_dev *rdev)
 992 {
 993         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 994         int ldo = rdev_get_id(rdev);
 995         u16 shift;
 996
 997         if (ldo < WM8350_LDO_1 || ldo > WM8350_LDO_4)
 998                 return -EINVAL;
 999
1000         shift = (ldo - WM8350_LDO_1) + 8;
1001         wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 1 << shift);
1002         return 0;
1003 }
1004
1005 static int wm8350_ldo_disable(struct regulator_dev *rdev)
1006 {
1007         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
1008         int ldo = rdev_get_id(rdev);
1009         u16 shift;
1010
1011         if (ldo < WM8350_LDO_1 || ldo > WM8350_LDO_4)
1012                 return -EINVAL;
1013
1014         shift = (ldo - WM8350_LDO_1) + 8;
1015         wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 1 << shift);
1016         return 0;
1017 }
1018
1019 static int force_continuous_enable(struct wm8350 *wm8350, int dcdc, int enable)
1020 {
1021         int reg = 0, ret;
1022
1023         switch (dcdc) {
1024         case WM8350_DCDC_1:
1025                 reg = WM8350_DCDC1_FORCE_PWM;
1026                 break;
1027         case WM8350_DCDC_3:
1028                 reg = WM8350_DCDC3_FORCE_PWM;
1029                 break;
1030         case WM8350_DCDC_4:
1031                 reg = WM8350_DCDC4_FORCE_PWM;
1032                 break;
1033         case WM8350_DCDC_6:
1034                 reg = WM8350_DCDC6_FORCE_PWM;
1035                 break;
1036         default:
1037                 return -EINVAL;
1038         }
1039
1040         if (enable)
1041                 ret = wm8350_set_bits(wm8350, reg,
1042                         WM8350_DCDC1_FORCE_PWM_ENA);
1043         else
1044                 ret = wm8350_clear_bits(wm8350, reg,
1045                         WM8350_DCDC1_FORCE_PWM_ENA);
1046         return ret;
1047 }
1048
1049 static int wm8350_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode)
1050 {
1051         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
1052         int dcdc = rdev_get_id(rdev);
1053         u16 val;
1054
1055         if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6)
1056                 return -EINVAL;
1057
1058         if (dcdc == WM8350_DCDC_2 || dcdc == WM8350_DCDC_5)
1059                 return -EINVAL;
1060
1061         val = 1 << (dcdc - WM8350_DCDC_1);
1062
1063         switch (mode) {
1064         case REGULATOR_MODE_FAST:
1065                 /* force continuous mode */
1066                 wm8350_set_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val);
1067                 wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
1068                 force_continuous_enable(wm8350, dcdc, 1);
1069                 break;
1070         case REGULATOR_MODE_NORMAL:
1071                 /* active / pulse skipping */
1072                 wm8350_set_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val);
1073                 wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
1074                 force_continuous_enable(wm8350, dcdc, 0);
1075                 break;
1076         case REGULATOR_MODE_IDLE:
1077                 /* standby mode */
1078                 force_continuous_enable(wm8350, dcdc, 0);
1079                 wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
1080                 wm8350_clear_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val);
1081                 break;
1082         case REGULATOR_MODE_STANDBY:
1083                 /* LDO mode */
1084                 force_continuous_enable(wm8350, dcdc, 0);
1085                 wm8350_set_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
1086                 break;
1087         }
1088
1089         return 0;
1090 }
1091
1092 static unsigned int wm8350_dcdc_get_mode(struct regulator_dev *rdev)
1093 {
1094         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
1095         int dcdc = rdev_get_id(rdev);
1096         u16 mask, sleep, active, force;
1097         int mode = REGULATOR_MODE_NORMAL;
1098         int reg;
1099
1100         switch (dcdc) {
1101         case WM8350_DCDC_1:
1102                 reg = WM8350_DCDC1_FORCE_PWM;
1103                 break;
1104         case WM8350_DCDC_3:
1105                 reg = WM8350_DCDC3_FORCE_PWM;
1106                 break;
1107         case WM8350_DCDC_4:
1108                 reg = WM8350_DCDC4_FORCE_PWM;
1109                 break;
1110         case WM8350_DCDC_6:
1111                 reg = WM8350_DCDC6_FORCE_PWM;
1112                 break;
1113         default:
1114                 return -EINVAL;
1115         }
1116
1117         mask = 1 << (dcdc - WM8350_DCDC_1);
1118         active = wm8350_reg_read(wm8350, WM8350_DCDC_ACTIVE_OPTIONS) & mask;
1119         force = wm8350_reg_read(wm8350, reg) & WM8350_DCDC1_FORCE_PWM_ENA;
1120         sleep = wm8350_reg_read(wm8350, WM8350_DCDC_SLEEP_OPTIONS) & mask;
1121
1122         dev_dbg(wm8350->dev, "mask %x active %x sleep %x force %x",
1123                 mask, active, sleep, force);
1124
1125         if (active && !sleep) {
1126                 if (force)
1127                         mode = REGULATOR_MODE_FAST;
1128                 else
1129                         mode = REGULATOR_MODE_NORMAL;
1130         } else if (!active && !sleep)
1131                 mode = REGULATOR_MODE_IDLE;
1132         else if (sleep)
1133                 mode = REGULATOR_MODE_STANDBY;
1134
1135         return mode;
1136 }
1137
1138 static unsigned int wm8350_ldo_get_mode(struct regulator_dev *rdev)
1139 {
1140         return REGULATOR_MODE_NORMAL;
1141 }
1142
1143 struct wm8350_dcdc_efficiency {
1144         int uA_load_min;
1145         int uA_load_max;
1146         unsigned int mode;
1147 };
1148
1149 static const struct wm8350_dcdc_efficiency dcdc1_6_efficiency[] = {
1150         {0, 10000, REGULATOR_MODE_STANDBY},       /* 0 - 10mA - LDO */
1151         {10000, 100000, REGULATOR_MODE_IDLE},     /* 10mA - 100mA - Standby */
1152         {100000, 1000000, REGULATOR_MODE_NORMAL}, /* > 100mA - Active */
1153         {-1, -1, REGULATOR_MODE_NORMAL},
1154 };
1155
1156 static const struct wm8350_dcdc_efficiency dcdc3_4_efficiency[] = {
1157         {0, 10000, REGULATOR_MODE_STANDBY},      /* 0 - 10mA - LDO */
1158         {10000, 100000, REGULATOR_MODE_IDLE},    /* 10mA - 100mA - Standby */
1159         {100000, 800000, REGULATOR_MODE_NORMAL}, /* > 100mA - Active */
1160         {-1, -1, REGULATOR_MODE_NORMAL},
1161 };
1162
1163 static unsigned int get_mode(int uA, const struct wm8350_dcdc_efficiency *eff)
1164 {
1165         int i = 0;
1166
1167         while (eff[i].uA_load_min != -1) {
1168                 if (uA >= eff[i].uA_load_min && uA <= eff[i].uA_load_max)
1169                         return eff[i].mode;
1170         }
1171         return REGULATOR_MODE_NORMAL;
1172 }
1173
1174 /* Query the regulator for it's most efficient mode @ uV,uA
1175  * WM8350 regulator efficiency is pretty similar over
1176  * different input and output uV.
1177  */
1178 static unsigned int wm8350_dcdc_get_optimum_mode(struct regulator_dev *rdev,
1179                                                  int input_uV, int output_uV,
1180                                                  int output_uA)
1181 {
1182         int dcdc = rdev_get_id(rdev), mode;
1183
1184         switch (dcdc) {
1185         case WM8350_DCDC_1:
1186         case WM8350_DCDC_6:
1187                 mode = get_mode(output_uA, dcdc1_6_efficiency);
1188                 break;
1189         case WM8350_DCDC_3:
1190         case WM8350_DCDC_4:
1191                 mode = get_mode(output_uA, dcdc3_4_efficiency);
1192                 break;
1193         default:
1194                 mode = REGULATOR_MODE_NORMAL;
1195                 break;
1196         }
1197         return mode;
1198 }
1199
1200 static int wm8350_dcdc_is_enabled(struct regulator_dev *rdev)
1201 {
1202         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
1203         int dcdc = rdev_get_id(rdev), shift;
1204
1205         if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6)
1206                 return -EINVAL;
1207
1208         shift = dcdc - WM8350_DCDC_1;
1209         return wm8350_reg_read(wm8350, WM8350_DCDC_LDO_REQUESTED)
1210             & (1 << shift);
1211 }
1212
1213 static int wm8350_ldo_is_enabled(struct regulator_dev *rdev)
1214 {
1215         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
1216         int ldo = rdev_get_id(rdev), shift;
1217
1218         if (ldo < WM8350_LDO_1 || ldo > WM8350_LDO_4)
1219                 return -EINVAL;
1220
1221         shift = (ldo - WM8350_LDO_1) + 8;
1222         return wm8350_reg_read(wm8350, WM8350_DCDC_LDO_REQUESTED)
1223             & (1 << shift);
1224 }
1225
1226 static struct regulator_ops wm8350_dcdc_ops = {
1227         .set_voltage = wm8350_dcdc_set_voltage,
1228         .get_voltage_sel = wm8350_dcdc_get_voltage_sel,
1229         .list_voltage = wm8350_dcdc_list_voltage,
1230         .enable = wm8350_dcdc_enable,
1231         .disable = wm8350_dcdc_disable,
1232         .get_mode = wm8350_dcdc_get_mode,
1233         .set_mode = wm8350_dcdc_set_mode,
1234         .get_optimum_mode = wm8350_dcdc_get_optimum_mode,
1235         .is_enabled = wm8350_dcdc_is_enabled,
1236         .set_suspend_voltage = wm8350_dcdc_set_suspend_voltage,
1237         .set_suspend_enable = wm8350_dcdc_set_suspend_enable,
1238         .set_suspend_disable = wm8350_dcdc_set_suspend_disable,
1239         .set_suspend_mode = wm8350_dcdc_set_suspend_mode,
1240 };
1241
1242 static struct regulator_ops wm8350_dcdc2_5_ops = {
1243         .enable = wm8350_dcdc_enable,
1244         .disable = wm8350_dcdc_disable,
1245         .is_enabled = wm8350_dcdc_is_enabled,
1246         .set_suspend_enable = wm8350_dcdc25_set_suspend_enable,
1247         .set_suspend_disable = wm8350_dcdc25_set_suspend_disable,
1248 };
1249
1250 static struct regulator_ops wm8350_ldo_ops = {
1251         .set_voltage = wm8350_ldo_set_voltage,
1252         .get_voltage_sel = wm8350_ldo_get_voltage_sel,
1253         .list_voltage = wm8350_ldo_list_voltage,
1254         .enable = wm8350_ldo_enable,
1255         .disable = wm8350_ldo_disable,
1256         .is_enabled = wm8350_ldo_is_enabled,
1257         .get_mode = wm8350_ldo_get_mode,
1258         .set_suspend_voltage = wm8350_ldo_set_suspend_voltage,
1259         .set_suspend_enable = wm8350_ldo_set_suspend_enable,
1260         .set_suspend_disable = wm8350_ldo_set_suspend_disable,
1261 };
1262
1263 static struct regulator_ops wm8350_isink_ops = {
1264         .set_current_limit = wm8350_isink_set_current,
1265         .get_current_limit = wm8350_isink_get_current,
1266         .enable = wm8350_isink_enable,
1267         .disable = wm8350_isink_disable,
1268         .is_enabled = wm8350_isink_is_enabled,
1269         .enable_time = wm8350_isink_enable_time,
1270 };
1271
1272 static struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
1273         {
1274                 .name = "DCDC1",
1275                 .id = WM8350_DCDC_1,
1276                 .ops = &wm8350_dcdc_ops,
1277                 .irq = WM8350_IRQ_UV_DC1,
1278                 .type = REGULATOR_VOLTAGE,
1279                 .n_voltages = WM8350_DCDC_MAX_VSEL + 1,
1280                 .owner = THIS_MODULE,
1281         },
1282         {
1283                 .name = "DCDC2",
1284                 .id = WM8350_DCDC_2,
1285                 .ops = &wm8350_dcdc2_5_ops,
1286                 .irq = WM8350_IRQ_UV_DC2,
1287                 .type = REGULATOR_VOLTAGE,
1288                 .owner = THIS_MODULE,
1289         },
1290         {
1291                 .name = "DCDC3",
1292                 .id = WM8350_DCDC_3,
1293                 .ops = &wm8350_dcdc_ops,
1294                 .irq = WM8350_IRQ_UV_DC3,
1295                 .type = REGULATOR_VOLTAGE,
1296                 .n_voltages = WM8350_DCDC_MAX_VSEL + 1,
1297                 .owner = THIS_MODULE,
1298         },
1299         {
1300                 .name = "DCDC4",
1301                 .id = WM8350_DCDC_4,
1302                 .ops = &wm8350_dcdc_ops,
1303                 .irq = WM8350_IRQ_UV_DC4,
1304                 .type = REGULATOR_VOLTAGE,
1305                 .n_voltages = WM8350_DCDC_MAX_VSEL + 1,
1306                 .owner = THIS_MODULE,
1307         },
1308         {
1309                 .name = "DCDC5",
1310                 .id = WM8350_DCDC_5,
1311                 .ops = &wm8350_dcdc2_5_ops,
1312                 .irq = WM8350_IRQ_UV_DC5,
1313                 .type = REGULATOR_VOLTAGE,
1314                 .owner = THIS_MODULE,
1315          },
1316         {
1317                 .name = "DCDC6",
1318                 .id = WM8350_DCDC_6,
1319                 .ops = &wm8350_dcdc_ops,
1320                 .irq = WM8350_IRQ_UV_DC6,
1321                 .type = REGULATOR_VOLTAGE,
1322                 .n_voltages = WM8350_DCDC_MAX_VSEL + 1,
1323                 .owner = THIS_MODULE,
1324         },
1325         {
1326                 .name = "LDO1",
1327                 .id = WM8350_LDO_1,
1328                 .ops = &wm8350_ldo_ops,
1329                 .irq = WM8350_IRQ_UV_LDO1,
1330                 .type = REGULATOR_VOLTAGE,
1331                 .n_voltages = WM8350_LDO1_VSEL_MASK + 1,
1332                 .owner = THIS_MODULE,
1333         },
1334         {
1335                 .name = "LDO2",
1336                 .id = WM8350_LDO_2,
1337                 .ops = &wm8350_ldo_ops,
1338                 .irq = WM8350_IRQ_UV_LDO2,
1339                 .type = REGULATOR_VOLTAGE,
1340                 .n_voltages = WM8350_LDO2_VSEL_MASK + 1,
1341                 .owner = THIS_MODULE,
1342         },
1343         {
1344                 .name = "LDO3",
1345                 .id = WM8350_LDO_3,
1346                 .ops = &wm8350_ldo_ops,
1347                 .irq = WM8350_IRQ_UV_LDO3,
1348                 .type = REGULATOR_VOLTAGE,
1349                 .n_voltages = WM8350_LDO3_VSEL_MASK + 1,
1350                 .owner = THIS_MODULE,
1351         },
1352         {
1353                 .name = "LDO4",
1354                 .id = WM8350_LDO_4,
1355                 .ops = &wm8350_ldo_ops,
1356                 .irq = WM8350_IRQ_UV_LDO4,
1357                 .type = REGULATOR_VOLTAGE,
1358                 .n_voltages = WM8350_LDO4_VSEL_MASK + 1,
1359                 .owner = THIS_MODULE,
1360         },
1361         {
1362                 .name = "ISINKA",
1363                 .id = WM8350_ISINK_A,
1364                 .ops = &wm8350_isink_ops,
1365                 .irq = WM8350_IRQ_CS1,
1366                 .type = REGULATOR_CURRENT,
1367                 .owner = THIS_MODULE,
1368          },
1369         {
1370                 .name = "ISINKB",
1371                 .id = WM8350_ISINK_B,
1372                 .ops = &wm8350_isink_ops,
1373                 .irq = WM8350_IRQ_CS2,
1374                 .type = REGULATOR_CURRENT,
1375                 .owner = THIS_MODULE,
1376          },
1377 };
1378
1379 static irqreturn_t pmic_uv_handler(int irq, void *data)
1380 {
1381         struct regulator_dev *rdev = (struct regulator_dev *)data;
1382         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
1383
1384         mutex_lock(&rdev->mutex);
1385         if (irq == WM8350_IRQ_CS1 || irq == WM8350_IRQ_CS2)
1386                 regulator_notifier_call_chain(rdev,
1387                                               REGULATOR_EVENT_REGULATION_OUT,
1388                                               wm8350);
1389         else
1390                 regulator_notifier_call_chain(rdev,
1391                                               REGULATOR_EVENT_UNDER_VOLTAGE,
1392                                               wm8350);
1393         mutex_unlock(&rdev->mutex);
1394
1395         return IRQ_HANDLED;
1396 }
1397
1398 static int wm8350_regulator_probe(struct platform_device *pdev)
1399 {
1400         struct wm8350 *wm8350 = dev_get_drvdata(&pdev->dev);
1401         struct regulator_dev *rdev;
1402         int ret;
1403         u16 val;
1404
1405         if (pdev->id < WM8350_DCDC_1 || pdev->id > WM8350_ISINK_B)
1406                 return -ENODEV;
1407
1408         /* do any regulatior specific init */
1409         switch (pdev->id) {
1410         case WM8350_DCDC_1:
1411                 val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER);
1412                 wm8350->pmic.dcdc1_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
1413                 break;
1414         case WM8350_DCDC_3:
1415                 val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER);
1416                 wm8350->pmic.dcdc3_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
1417                 break;
1418         case WM8350_DCDC_4:
1419                 val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER);
1420                 wm8350->pmic.dcdc4_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
1421                 break;
1422         case WM8350_DCDC_6:
1423                 val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER);
1424                 wm8350->pmic.dcdc6_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
1425                 break;
1426         }
1427
1428         /* register regulator */
1429         rdev = regulator_register(&wm8350_reg[pdev->id], &pdev->dev,
1430                                   pdev->dev.platform_data,
1431                                   dev_get_drvdata(&pdev->dev));
1432         if (IS_ERR(rdev)) {
1433                 dev_err(&pdev->dev, "failed to register %s\n",
1434                         wm8350_reg[pdev->id].name);
1435                 return PTR_ERR(rdev);
1436         }
1437
1438         /* register regulator IRQ */
1439         ret = wm8350_register_irq(wm8350, wm8350_reg[pdev->id].irq,
1440                                   pmic_uv_handler, 0, "UV", rdev);
1441         if (ret < 0) {
1442                 regulator_unregister(rdev);
1443                 dev_err(&pdev->dev, "failed to register regulator %s IRQ\n",
1444                         wm8350_reg[pdev->id].name);
1445                 return ret;
1446         }
1447
1448         return 0;
1449 }
1450
1451 static int wm8350_regulator_remove(struct platform_device *pdev)
1452 {
1453         struct regulator_dev *rdev = platform_get_drvdata(pdev);
1454         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
1455
1456         wm8350_free_irq(wm8350, wm8350_reg[pdev->id].irq, rdev);
1457
1458         regulator_unregister(rdev);
1459
1460         return 0;
1461 }
1462
1463 int wm8350_register_regulator(struct wm8350 *wm8350, int reg,
1464                               struct regulator_init_data *initdata)
1465 {
1466         struct platform_device *pdev;
1467         int ret;
1468         if (reg < 0 || reg >= NUM_WM8350_REGULATORS)
1469                 return -EINVAL;
1470
1471         if (wm8350->pmic.pdev[reg])
1472                 return -EBUSY;
1473
1474         if (reg >= WM8350_DCDC_1 && reg <= WM8350_DCDC_6 &&
1475             reg > wm8350->pmic.max_dcdc)
1476                 return -ENODEV;
1477         if (reg >= WM8350_ISINK_A && reg <= WM8350_ISINK_B &&
1478             reg > wm8350->pmic.max_isink)
1479                 return -ENODEV;
1480
1481         pdev = platform_device_alloc("wm8350-regulator", reg);
1482         if (!pdev)
1483                 return -ENOMEM;
1484
1485         wm8350->pmic.pdev[reg] = pdev;
1486
1487         initdata->driver_data = wm8350;
1488
1489         pdev->dev.platform_data = initdata;
1490         pdev->dev.parent = wm8350->dev;
1491         platform_set_drvdata(pdev, wm8350);
1492
1493         ret = platform_device_add(pdev);
1494
1495         if (ret != 0) {
1496                 dev_err(wm8350->dev, "Failed to register regulator %d: %d\n",
1497                         reg, ret);
1498                 platform_device_put(pdev);
1499                 wm8350->pmic.pdev[reg] = NULL;
1500         }
1501
1502         return ret;
1503 }
1504 EXPORT_SYMBOL_GPL(wm8350_register_regulator);
1505
1506 /**
1507  * wm8350_register_led - Register a WM8350 LED output
1508  *
1509  * @param wm8350 The WM8350 device to configure.
1510  * @param lednum LED device index to create.
1511  * @param dcdc The DCDC to use for the LED.
1512  * @param isink The ISINK to use for the LED.
1513  * @param pdata Configuration for the LED.
1514  *
1515  * The WM8350 supports the use of an ISINK together with a DCDC to
1516  * provide a power-efficient LED driver.  This function registers the
1517  * regulators and instantiates the platform device for a LED.  The
1518  * operating modes for the LED regulators must be configured using
1519  * wm8350_isink_set_flash(), wm8350_dcdc25_set_mode() and
1520  * wm8350_dcdc_set_slot() prior to calling this function.
1521  */
1522 int wm8350_register_led(struct wm8350 *wm8350, int lednum, int dcdc, int isink,
1523                         struct wm8350_led_platform_data *pdata)
1524 {
1525         struct wm8350_led *led;
1526         struct platform_device *pdev;
1527         int ret;
1528
1529         if (lednum >= ARRAY_SIZE(wm8350->pmic.led) || lednum < 0) {
1530                 dev_err(wm8350->dev, "Invalid LED index %d\n", lednum);
1531                 return -ENODEV;
1532         }
1533
1534         led = &wm8350->pmic.led[lednum];
1535
1536         if (led->pdev) {
1537                 dev_err(wm8350->dev, "LED %d already allocated\n", lednum);
1538                 return -EINVAL;
1539         }
1540
1541         pdev = platform_device_alloc("wm8350-led", lednum);
1542         if (pdev == NULL) {
1543                 dev_err(wm8350->dev, "Failed to allocate LED %d\n", lednum);
1544                 return -ENOMEM;
1545         }
1546
1547         led->isink_consumer.dev = &pdev->dev;
1548         led->isink_consumer.supply = "led_isink";
1549         led->isink_init.num_consumer_supplies = 1;
1550         led->isink_init.consumer_supplies = &led->isink_consumer;
1551         led->isink_init.constraints.min_uA = 0;
1552         led->isink_init.constraints.max_uA = pdata->max_uA;
1553         led->isink_init.constraints.valid_ops_mask
1554                 = REGULATOR_CHANGE_CURRENT | REGULATOR_CHANGE_STATUS;
1555         led->isink_init.constraints.valid_modes_mask = REGULATOR_MODE_NORMAL;
1556         ret = wm8350_register_regulator(wm8350, isink, &led->isink_init);
1557         if (ret != 0) {
1558                 platform_device_put(pdev);
1559                 return ret;
1560         }
1561
1562         led->dcdc_consumer.dev = &pdev->dev;
1563         led->dcdc_consumer.supply = "led_vcc";
1564         led->dcdc_init.num_consumer_supplies = 1;
1565         led->dcdc_init.consumer_supplies = &led->dcdc_consumer;
1566         led->dcdc_init.constraints.valid_modes_mask = REGULATOR_MODE_NORMAL;
1567         led->dcdc_init.constraints.valid_ops_mask =  REGULATOR_CHANGE_STATUS;
1568         ret = wm8350_register_regulator(wm8350, dcdc, &led->dcdc_init);
1569         if (ret != 0) {
1570                 platform_device_put(pdev);
1571                 return ret;
1572         }
1573
1574         switch (isink) {
1575         case WM8350_ISINK_A:
1576                 wm8350->pmic.isink_A_dcdc = dcdc;
1577                 break;
1578         case WM8350_ISINK_B:
1579                 wm8350->pmic.isink_B_dcdc = dcdc;
1580                 break;
1581         }
1582
1583         pdev->dev.platform_data = pdata;
1584         pdev->dev.parent = wm8350->dev;
1585         ret = platform_device_add(pdev);
1586         if (ret != 0) {
1587                 dev_err(wm8350->dev, "Failed to register LED %d: %d\n",
1588                         lednum, ret);
1589                 platform_device_put(pdev);
1590                 return ret;
1591         }
1592
1593         led->pdev = pdev;
1594
1595         return 0;
1596 }
1597 EXPORT_SYMBOL_GPL(wm8350_register_led);
1598
1599 static struct platform_driver wm8350_regulator_driver = {
1600         .probe = wm8350_regulator_probe,
1601         .remove = wm8350_regulator_remove,
1602         .driver         = {
1603                 .name   = "wm8350-regulator",
1604         },
1605 };
1606
1607 static int __init wm8350_regulator_init(void)
1608 {
1609         return platform_driver_register(&wm8350_regulator_driver);
1610 }
1611 subsys_initcall(wm8350_regulator_init);
1612
1613 static void __exit wm8350_regulator_exit(void)
1614 {
1615         platform_driver_unregister(&wm8350_regulator_driver);
1616 }
1617 module_exit(wm8350_regulator_exit);
1618
1619 /* Module information */
1620 MODULE_AUTHOR("Liam Girdwood");
1621 MODULE_DESCRIPTION("WM8350 voltage and current regulator driver");
1622 MODULE_LICENSE("GPL");
1623 MODULE_ALIAS("platform:wm8350-regulator");