drivers/mfd/wm831x-core.c

   1 /*
   2  * wm831x-core.c  --  Device access for Wolfson WM831x PMICs
   3  *
   4  * Copyright 2009 Wolfson Microelectronics PLC.
   5  *
   6  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  *
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/i2c.h>
  18 #include <linux/bcd.h>
  19 #include <linux/delay.h>
  20 #include <linux/mfd/core.h>
  21 #include <linux/slab.h>
  22
  23 #include <linux/mfd/wm831x/core.h>
  24 #include <linux/mfd/wm831x/pdata.h>
  25 #include <linux/mfd/wm831x/irq.h>
  26 #include <linux/mfd/wm831x/auxadc.h>
  27 #include <linux/mfd/wm831x/otp.h>
  28 #include <linux/mfd/wm831x/regulator.h>
  29
  30 /* Current settings - values are 2*2^(reg_val/4) microamps.  These are
  31  * exported since they are used by multiple drivers.
  32  */
  33 int wm831x_isinkv_values[WM831X_ISINK_MAX_ISEL + 1] = {
  34         2,
  35         2,
  36         3,
  37         3,
  38         4,
  39         5,
  40         6,
  41         7,
  42         8,
  43         10,
  44         11,
  45         13,
  46         16,
  47         19,
  48         23,
  49         27,
  50         32,
  51         38,
  52         45,
  53         54,
  54         64,
  55         76,
  56         91,
  57         108,
  58         128,
  59         152,
  60         181,
  61         215,
  62         256,
  63         304,
  64         362,
  65         431,
  66         512,
  67         609,
  68         724,
  69         861,
  70         1024,
  71         1218,
  72         1448,
  73         1722,
  74         2048,
  75         2435,
  76         2896,
  77         3444,
  78         4096,
  79         4871,
  80         5793,
  81         6889,
  82         8192,
  83         9742,
  84         11585,
  85         13777,
  86         16384,
  87         19484,
  88         23170,
  89         27554,
  90 };
  91 EXPORT_SYMBOL_GPL(wm831x_isinkv_values);
  92
  93 enum wm831x_parent {
  94         WM8310 = 0x8310,
  95         WM8311 = 0x8311,
  96         WM8312 = 0x8312,
  97         WM8320 = 0x8320,
  98 };
  99
 100 static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg)
 101 {
 102         if (!wm831x->locked)
 103                 return 0;
 104
 105         switch (reg) {
 106         case WM831X_WATCHDOG:
 107         case WM831X_DC4_CONTROL:
 108         case WM831X_ON_PIN_CONTROL:
 109         case WM831X_BACKUP_CHARGER_CONTROL:
 110         case WM831X_CHARGER_CONTROL_1:
 111         case WM831X_CHARGER_CONTROL_2:
 112                 return 1;
 113
 114         default:
 115                 return 0;
 116         }
 117 }
 118
 119 /**
 120  * wm831x_reg_unlock: Unlock user keyed registers
 121  *
 122  * The WM831x has a user key preventing writes to particularly
 123  * critical registers.  This function locks those registers,
 124  * allowing writes to them.
 125  */
 126 void wm831x_reg_lock(struct wm831x *wm831x)
 127 {
 128         int ret;
 129
 130         ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
 131         if (ret == 0) {
 132                 dev_vdbg(wm831x->dev, "Registers locked\n");
 133
 134                 mutex_lock(&wm831x->io_lock);
 135                 WARN_ON(wm831x->locked);
 136                 wm831x->locked = 1;
 137                 mutex_unlock(&wm831x->io_lock);
 138         } else {
 139                 dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret);
 140         }
 141
 142 }
 143 EXPORT_SYMBOL_GPL(wm831x_reg_lock);
 144
 145 /**
 146  * wm831x_reg_unlock: Unlock user keyed registers
 147  *
 148  * The WM831x has a user key preventing writes to particularly
 149  * critical registers.  This function locks those registers,
 150  * preventing spurious writes.
 151  */
 152 int wm831x_reg_unlock(struct wm831x *wm831x)
 153 {
 154         int ret;
 155
 156         /* 0x9716 is the value required to unlock the registers */
 157         ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716);
 158         if (ret == 0) {
 159                 dev_vdbg(wm831x->dev, "Registers unlocked\n");
 160
 161                 mutex_lock(&wm831x->io_lock);
 162                 WARN_ON(!wm831x->locked);
 163                 wm831x->locked = 0;
 164                 mutex_unlock(&wm831x->io_lock);
 165         }
 166
 167         return ret;
 168 }
 169 EXPORT_SYMBOL_GPL(wm831x_reg_unlock);
 170
 171 static int wm831x_read(struct wm831x *wm831x, unsigned short reg,
 172                        int bytes, void *dest)
 173 {
 174         int ret, i;
 175         u16 *buf = dest;
 176
 177         BUG_ON(bytes % 2);
 178         BUG_ON(bytes <= 0);
 179
 180         ret = wm831x->read_dev(wm831x, reg, bytes, dest);
 181         if (ret < 0)
 182                 return ret;
 183
 184         for (i = 0; i < bytes / 2; i++) {
 185                 buf[i] = be16_to_cpu(buf[i]);
 186
 187                 dev_vdbg(wm831x->dev, "Read %04x from R%d(0x%x)\n",
 188                          buf[i], reg + i, reg + i);
 189         }
 190
 191         return 0;
 192 }
 193
 194 /**
 195  * wm831x_reg_read: Read a single WM831x register.
 196  *
 197  * @wm831x: Device to read from.
 198  * @reg: Register to read.
 199  */
 200 int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
 201 {
 202         unsigned short val;
 203         int ret;
 204
 205         mutex_lock(&wm831x->io_lock);
 206
 207         ret = wm831x_read(wm831x, reg, 2, &val);
 208
 209         mutex_unlock(&wm831x->io_lock);
 210
 211         if (ret < 0)
 212                 return ret;
 213         else
 214                 return val;
 215 }
 216 EXPORT_SYMBOL_GPL(wm831x_reg_read);
 217
 218 /**
 219  * wm831x_bulk_read: Read multiple WM831x registers
 220  *
 221  * @wm831x: Device to read from
 222  * @reg: First register
 223  * @count: Number of registers
 224  * @buf: Buffer to fill.
 225  */
 226 int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
 227                      int count, u16 *buf)
 228 {
 229         int ret;
 230
 231         mutex_lock(&wm831x->io_lock);
 232
 233         ret = wm831x_read(wm831x, reg, count * 2, buf);
 234
 235         mutex_unlock(&wm831x->io_lock);
 236
 237         return ret;
 238 }
 239 EXPORT_SYMBOL_GPL(wm831x_bulk_read);
 240
 241 static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
 242                         int bytes, void *src)
 243 {
 244         u16 *buf = src;
 245         int i;
 246
 247         BUG_ON(bytes % 2);
 248         BUG_ON(bytes <= 0);
 249
 250         for (i = 0; i < bytes / 2; i++) {
 251                 if (wm831x_reg_locked(wm831x, reg))
 252                         return -EPERM;
 253
 254                 dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
 255                          buf[i], reg + i, reg + i);
 256
 257                 buf[i] = cpu_to_be16(buf[i]);
 258         }
 259
 260         return wm831x->write_dev(wm831x, reg, bytes, src);
 261 }
 262
 263 /**
 264  * wm831x_reg_write: Write a single WM831x register.
 265  *
 266  * @wm831x: Device to write to.
 267  * @reg: Register to write to.
 268  * @val: Value to write.
 269  */
 270 int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg,
 271                      unsigned short val)
 272 {
 273         int ret;
 274
 275         mutex_lock(&wm831x->io_lock);
 276
 277         ret = wm831x_write(wm831x, reg, 2, &val);
 278
 279         mutex_unlock(&wm831x->io_lock);
 280
 281         return ret;
 282 }
 283 EXPORT_SYMBOL_GPL(wm831x_reg_write);
 284
 285 /**
 286  * wm831x_set_bits: Set the value of a bitfield in a WM831x register
 287  *
 288  * @wm831x: Device to write to.
 289  * @reg: Register to write to.
 290  * @mask: Mask of bits to set.
 291  * @val: Value to set (unshifted)
 292  */
 293 int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
 294                     unsigned short mask, unsigned short val)
 295 {
 296         int ret;
 297         u16 r;
 298
 299         mutex_lock(&wm831x->io_lock);
 300
 301         ret = wm831x_read(wm831x, reg, 2, &r);
 302         if (ret < 0)
 303                 goto out;
 304
 305         r &= ~mask;
 306         r |= val;
 307
 308         ret = wm831x_write(wm831x, reg, 2, &r);
 309
 310 out:
 311         mutex_unlock(&wm831x->io_lock);
 312
 313         return ret;
 314 }
 315 EXPORT_SYMBOL_GPL(wm831x_set_bits);
 316
 317 /**
 318  * wm831x_auxadc_read: Read a value from the WM831x AUXADC
 319  *
 320  * @wm831x: Device to read from.
 321  * @input: AUXADC input to read.
 322  */
 323 int wm831x_auxadc_read(struct wm831x *wm831x, enum wm831x_auxadc input)
 324 {
 325         int ret, src;
 326
 327         mutex_lock(&wm831x->auxadc_lock);
 328
 329         ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
 330                               WM831X_AUX_ENA, WM831X_AUX_ENA);
 331         if (ret < 0) {
 332                 dev_err(wm831x->dev, "Failed to enable AUXADC: %d\n", ret);
 333                 goto out;
 334         }
 335
 336         /* We force a single source at present */
 337         src = input;
 338         ret = wm831x_reg_write(wm831x, WM831X_AUXADC_SOURCE,
 339                                1 << src);
 340         if (ret < 0) {
 341                 dev_err(wm831x->dev, "Failed to set AUXADC source: %d\n", ret);
 342                 goto out;
 343         }
 344
 345         ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
 346                               WM831X_AUX_CVT_ENA, WM831X_AUX_CVT_ENA);
 347         if (ret < 0) {
 348                 dev_err(wm831x->dev, "Failed to start AUXADC: %d\n", ret);
 349                 goto disable;
 350         }
 351
 352         /* Ignore the result to allow us to soldier on without IRQ hookup */
 353         wait_for_completion_timeout(&wm831x->auxadc_done, msecs_to_jiffies(5));
 354
 355         ret = wm831x_reg_read(wm831x, WM831X_AUXADC_CONTROL);
 356         if (ret < 0) {
 357                 dev_err(wm831x->dev, "AUXADC status read failed: %d\n", ret);
 358                 goto disable;
 359         }
 360
 361         if (ret & WM831X_AUX_CVT_ENA) {
 362                 dev_err(wm831x->dev, "Timed out reading AUXADC\n");
 363                 ret = -EBUSY;
 364                 goto disable;
 365         }
 366
 367         ret = wm831x_reg_read(wm831x, WM831X_AUXADC_DATA);
 368         if (ret < 0) {
 369                 dev_err(wm831x->dev, "Failed to read AUXADC data: %d\n", ret);
 370         } else {
 371                 src = ((ret & WM831X_AUX_DATA_SRC_MASK)
 372                        >> WM831X_AUX_DATA_SRC_SHIFT) - 1;
 373
 374                 if (src == 14)
 375                         src = WM831X_AUX_CAL;
 376
 377                 if (src != input) {
 378                         dev_err(wm831x->dev, "Data from source %d not %d\n",
 379                                 src, input);
 380                         ret = -EINVAL;
 381                 } else {
 382                         ret &= WM831X_AUX_DATA_MASK;
 383                 }
 384         }
 385
 386 disable:
 387         wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, WM831X_AUX_ENA, 0);
 388 out:
 389         mutex_unlock(&wm831x->auxadc_lock);
 390         return ret;
 391 }
 392 EXPORT_SYMBOL_GPL(wm831x_auxadc_read);
 393
 394 static irqreturn_t wm831x_auxadc_irq(int irq, void *irq_data)
 395 {
 396         struct wm831x *wm831x = irq_data;
 397
 398         complete(&wm831x->auxadc_done);
 399
 400         return IRQ_HANDLED;
 401 }
 402
 403 /**
 404  * wm831x_auxadc_read_uv: Read a voltage from the WM831x AUXADC
 405  *
 406  * @wm831x: Device to read from.
 407  * @input: AUXADC input to read.
 408  */
 409 int wm831x_auxadc_read_uv(struct wm831x *wm831x, enum wm831x_auxadc input)
 410 {
 411         int ret;
 412
 413         ret = wm831x_auxadc_read(wm831x, input);
 414         if (ret < 0)
 415                 return ret;
 416
 417         ret *= 1465;
 418
 419         return ret;
 420 }
 421 EXPORT_SYMBOL_GPL(wm831x_auxadc_read_uv);
 422
 423 static struct resource wm831x_dcdc1_resources[] = {
 424         {
 425                 .start = WM831X_DC1_CONTROL_1,
 426                 .end   = WM831X_DC1_DVS_CONTROL,
 427                 .flags = IORESOURCE_IO,
 428         },
 429         {
 430                 .name  = "UV",
 431                 .start = WM831X_IRQ_UV_DC1,
 432                 .end   = WM831X_IRQ_UV_DC1,
 433                 .flags = IORESOURCE_IRQ,
 434         },
 435         {
 436                 .name  = "HC",
 437                 .start = WM831X_IRQ_HC_DC1,
 438                 .end   = WM831X_IRQ_HC_DC1,
 439                 .flags = IORESOURCE_IRQ,
 440         },
 441 };
 442
 443
 444 static struct resource wm831x_dcdc2_resources[] = {
 445         {
 446                 .start = WM831X_DC2_CONTROL_1,
 447                 .end   = WM831X_DC2_DVS_CONTROL,
 448                 .flags = IORESOURCE_IO,
 449         },
 450         {
 451                 .name  = "UV",
 452                 .start = WM831X_IRQ_UV_DC2,
 453                 .end   = WM831X_IRQ_UV_DC2,
 454                 .flags = IORESOURCE_IRQ,
 455         },
 456         {
 457                 .name  = "HC",
 458                 .start = WM831X_IRQ_HC_DC2,
 459                 .end   = WM831X_IRQ_HC_DC2,
 460                 .flags = IORESOURCE_IRQ,
 461         },
 462 };
 463
 464 static struct resource wm831x_dcdc3_resources[] = {
 465         {
 466                 .start = WM831X_DC3_CONTROL_1,
 467                 .end   = WM831X_DC3_SLEEP_CONTROL,
 468                 .flags = IORESOURCE_IO,
 469         },
 470         {
 471                 .name  = "UV",
 472                 .start = WM831X_IRQ_UV_DC3,
 473                 .end   = WM831X_IRQ_UV_DC3,
 474                 .flags = IORESOURCE_IRQ,
 475         },
 476 };
 477
 478 static struct resource wm831x_dcdc4_resources[] = {
 479         {
 480                 .start = WM831X_DC4_CONTROL,
 481                 .end   = WM831X_DC4_SLEEP_CONTROL,
 482                 .flags = IORESOURCE_IO,
 483         },
 484         {
 485                 .name  = "UV",
 486                 .start = WM831X_IRQ_UV_DC4,
 487                 .end   = WM831X_IRQ_UV_DC4,
 488                 .flags = IORESOURCE_IRQ,
 489         },
 490 };
 491
 492 static struct resource wm8320_dcdc4_buck_resources[] = {
 493         {
 494                 .start = WM831X_DC4_CONTROL,
 495                 .end   = WM832X_DC4_SLEEP_CONTROL,
 496                 .flags = IORESOURCE_IO,
 497         },
 498         {
 499                 .name  = "UV",
 500                 .start = WM831X_IRQ_UV_DC4,
 501                 .end   = WM831X_IRQ_UV_DC4,
 502                 .flags = IORESOURCE_IRQ,
 503         },
 504 };
 505
 506 static struct resource wm831x_gpio_resources[] = {
 507         {
 508                 .start = WM831X_IRQ_GPIO_1,
 509                 .end   = WM831X_IRQ_GPIO_16,
 510                 .flags = IORESOURCE_IRQ,
 511         },
 512 };
 513
 514 static struct resource wm831x_isink1_resources[] = {
 515         {
 516                 .start = WM831X_CURRENT_SINK_1,
 517                 .end   = WM831X_CURRENT_SINK_1,
 518                 .flags = IORESOURCE_IO,
 519         },
 520         {
 521                 .start = WM831X_IRQ_CS1,
 522                 .end   = WM831X_IRQ_CS1,
 523                 .flags = IORESOURCE_IRQ,
 524         },
 525 };
 526
 527 static struct resource wm831x_isink2_resources[] = {
 528         {
 529                 .start = WM831X_CURRENT_SINK_2,
 530                 .end   = WM831X_CURRENT_SINK_2,
 531                 .flags = IORESOURCE_IO,
 532         },
 533         {
 534                 .start = WM831X_IRQ_CS2,
 535                 .end   = WM831X_IRQ_CS2,
 536                 .flags = IORESOURCE_IRQ,
 537         },
 538 };
 539
 540 static struct resource wm831x_ldo1_resources[] = {
 541         {
 542                 .start = WM831X_LDO1_CONTROL,
 543                 .end   = WM831X_LDO1_SLEEP_CONTROL,
 544                 .flags = IORESOURCE_IO,
 545         },
 546         {
 547                 .name  = "UV",
 548                 .start = WM831X_IRQ_UV_LDO1,
 549                 .end   = WM831X_IRQ_UV_LDO1,
 550                 .flags = IORESOURCE_IRQ,
 551         },
 552 };
 553
 554 static struct resource wm831x_ldo2_resources[] = {
 555         {
 556                 .start = WM831X_LDO2_CONTROL,
 557                 .end   = WM831X_LDO2_SLEEP_CONTROL,
 558                 .flags = IORESOURCE_IO,
 559         },
 560         {
 561                 .name  = "UV",
 562                 .start = WM831X_IRQ_UV_LDO2,
 563                 .end   = WM831X_IRQ_UV_LDO2,
 564                 .flags = IORESOURCE_IRQ,
 565         },
 566 };
 567
 568 static struct resource wm831x_ldo3_resources[] = {
 569         {
 570                 .start = WM831X_LDO3_CONTROL,
 571                 .end   = WM831X_LDO3_SLEEP_CONTROL,
 572                 .flags = IORESOURCE_IO,
 573         },
 574         {
 575                 .name  = "UV",
 576                 .start = WM831X_IRQ_UV_LDO3,
 577                 .end   = WM831X_IRQ_UV_LDO3,
 578                 .flags = IORESOURCE_IRQ,
 579         },
 580 };
 581
 582 static struct resource wm831x_ldo4_resources[] = {
 583         {
 584                 .start = WM831X_LDO4_CONTROL,
 585                 .end   = WM831X_LDO4_SLEEP_CONTROL,
 586                 .flags = IORESOURCE_IO,
 587         },
 588         {
 589                 .name  = "UV",
 590                 .start = WM831X_IRQ_UV_LDO4,
 591                 .end   = WM831X_IRQ_UV_LDO4,
 592                 .flags = IORESOURCE_IRQ,
 593         },
 594 };
 595
 596 static struct resource wm831x_ldo5_resources[] = {
 597         {
 598                 .start = WM831X_LDO5_CONTROL,
 599                 .end   = WM831X_LDO5_SLEEP_CONTROL,
 600                 .flags = IORESOURCE_IO,
 601         },
 602         {
 603                 .name  = "UV",
 604                 .start = WM831X_IRQ_UV_LDO5,
 605                 .end   = WM831X_IRQ_UV_LDO5,
 606                 .flags = IORESOURCE_IRQ,
 607         },
 608 };
 609
 610 static struct resource wm831x_ldo6_resources[] = {
 611         {
 612                 .start = WM831X_LDO6_CONTROL,
 613                 .end   = WM831X_LDO6_SLEEP_CONTROL,
 614                 .flags = IORESOURCE_IO,
 615         },
 616         {
 617                 .name  = "UV",
 618                 .start = WM831X_IRQ_UV_LDO6,
 619                 .end   = WM831X_IRQ_UV_LDO6,
 620                 .flags = IORESOURCE_IRQ,
 621         },
 622 };
 623
 624 static struct resource wm831x_ldo7_resources[] = {
 625         {
 626                 .start = WM831X_LDO7_CONTROL,
 627                 .end   = WM831X_LDO7_SLEEP_CONTROL,
 628                 .flags = IORESOURCE_IO,
 629         },
 630         {
 631                 .name  = "UV",
 632                 .start = WM831X_IRQ_UV_LDO7,
 633                 .end   = WM831X_IRQ_UV_LDO7,
 634                 .flags = IORESOURCE_IRQ,
 635         },
 636 };
 637
 638 static struct resource wm831x_ldo8_resources[] = {
 639         {
 640                 .start = WM831X_LDO8_CONTROL,
 641                 .end   = WM831X_LDO8_SLEEP_CONTROL,
 642                 .flags = IORESOURCE_IO,
 643         },
 644         {
 645                 .name  = "UV",
 646                 .start = WM831X_IRQ_UV_LDO8,
 647                 .end   = WM831X_IRQ_UV_LDO8,
 648                 .flags = IORESOURCE_IRQ,
 649         },
 650 };
 651
 652 static struct resource wm831x_ldo9_resources[] = {
 653         {
 654                 .start = WM831X_LDO9_CONTROL,
 655                 .end   = WM831X_LDO9_SLEEP_CONTROL,
 656                 .flags = IORESOURCE_IO,
 657         },
 658         {
 659                 .name  = "UV",
 660                 .start = WM831X_IRQ_UV_LDO9,
 661                 .end   = WM831X_IRQ_UV_LDO9,
 662                 .flags = IORESOURCE_IRQ,
 663         },
 664 };
 665
 666 static struct resource wm831x_ldo10_resources[] = {
 667         {
 668                 .start = WM831X_LDO10_CONTROL,
 669                 .end   = WM831X_LDO10_SLEEP_CONTROL,
 670                 .flags = IORESOURCE_IO,
 671         },
 672         {
 673                 .name  = "UV",
 674                 .start = WM831X_IRQ_UV_LDO10,
 675                 .end   = WM831X_IRQ_UV_LDO10,
 676                 .flags = IORESOURCE_IRQ,
 677         },
 678 };
 679
 680 static struct resource wm831x_ldo11_resources[] = {
 681         {
 682                 .start = WM831X_LDO11_ON_CONTROL,
 683                 .end   = WM831X_LDO11_SLEEP_CONTROL,
 684                 .flags = IORESOURCE_IO,
 685         },
 686 };
 687
 688 static struct resource wm831x_on_resources[] = {
 689         {
 690                 .start = WM831X_IRQ_ON,
 691                 .end   = WM831X_IRQ_ON,
 692                 .flags = IORESOURCE_IRQ,
 693         },
 694 };
 695
 696
 697 static struct resource wm831x_power_resources[] = {
 698         {
 699                 .name = "SYSLO",
 700                 .start = WM831X_IRQ_PPM_SYSLO,
 701                 .end   = WM831X_IRQ_PPM_SYSLO,
 702                 .flags = IORESOURCE_IRQ,
 703         },
 704         {
 705                 .name = "PWR SRC",
 706                 .start = WM831X_IRQ_PPM_PWR_SRC,
 707                 .end   = WM831X_IRQ_PPM_PWR_SRC,
 708                 .flags = IORESOURCE_IRQ,
 709         },
 710         {
 711                 .name = "USB CURR",
 712                 .start = WM831X_IRQ_PPM_USB_CURR,
 713                 .end   = WM831X_IRQ_PPM_USB_CURR,
 714                 .flags = IORESOURCE_IRQ,
 715         },
 716         {
 717                 .name = "BATT HOT",
 718                 .start = WM831X_IRQ_CHG_BATT_HOT,
 719                 .end   = WM831X_IRQ_CHG_BATT_HOT,
 720                 .flags = IORESOURCE_IRQ,
 721         },
 722         {
 723                 .name = "BATT COLD",
 724                 .start = WM831X_IRQ_CHG_BATT_COLD,
 725                 .end   = WM831X_IRQ_CHG_BATT_COLD,
 726                 .flags = IORESOURCE_IRQ,
 727         },
 728         {
 729                 .name = "BATT FAIL",
 730                 .start = WM831X_IRQ_CHG_BATT_FAIL,
 731                 .end   = WM831X_IRQ_CHG_BATT_FAIL,
 732                 .flags = IORESOURCE_IRQ,
 733         },
 734         {
 735                 .name = "OV",
 736                 .start = WM831X_IRQ_CHG_OV,
 737                 .end   = WM831X_IRQ_CHG_OV,
 738                 .flags = IORESOURCE_IRQ,
 739         },
 740         {
 741                 .name = "END",
 742                 .start = WM831X_IRQ_CHG_END,
 743                 .end   = WM831X_IRQ_CHG_END,
 744                 .flags = IORESOURCE_IRQ,
 745         },
 746         {
 747                 .name = "TO",
 748                 .start = WM831X_IRQ_CHG_TO,
 749                 .end   = WM831X_IRQ_CHG_TO,
 750                 .flags = IORESOURCE_IRQ,
 751         },
 752         {
 753                 .name = "MODE",
 754                 .start = WM831X_IRQ_CHG_MODE,
 755                 .end   = WM831X_IRQ_CHG_MODE,
 756                 .flags = IORESOURCE_IRQ,
 757         },
 758         {
 759                 .name = "START",
 760                 .start = WM831X_IRQ_CHG_START,
 761                 .end   = WM831X_IRQ_CHG_START,
 762                 .flags = IORESOURCE_IRQ,
 763         },
 764 };
 765
 766 static struct resource wm831x_rtc_resources[] = {
 767         {
 768                 .name = "PER",
 769                 .start = WM831X_IRQ_RTC_PER,
 770                 .end   = WM831X_IRQ_RTC_PER,
 771                 .flags = IORESOURCE_IRQ,
 772         },
 773         {
 774                 .name = "ALM",
 775                 .start = WM831X_IRQ_RTC_ALM,
 776                 .end   = WM831X_IRQ_RTC_ALM,
 777                 .flags = IORESOURCE_IRQ,
 778         },
 779 };
 780
 781 static struct resource wm831x_status1_resources[] = {
 782         {
 783                 .start = WM831X_STATUS_LED_1,
 784                 .end   = WM831X_STATUS_LED_1,
 785                 .flags = IORESOURCE_IO,
 786         },
 787 };
 788
 789 static struct resource wm831x_status2_resources[] = {
 790         {
 791                 .start = WM831X_STATUS_LED_2,
 792                 .end   = WM831X_STATUS_LED_2,
 793                 .flags = IORESOURCE_IO,
 794         },
 795 };
 796
 797 static struct resource wm831x_touch_resources[] = {
 798         {
 799                 .name = "TCHPD",
 800                 .start = WM831X_IRQ_TCHPD,
 801                 .end   = WM831X_IRQ_TCHPD,
 802                 .flags = IORESOURCE_IRQ,
 803         },
 804         {
 805                 .name = "TCHDATA",
 806                 .start = WM831X_IRQ_TCHDATA,
 807                 .end   = WM831X_IRQ_TCHDATA,
 808                 .flags = IORESOURCE_IRQ,
 809         },
 810 };
 811
 812 static struct resource wm831x_wdt_resources[] = {
 813         {
 814                 .start = WM831X_IRQ_WDOG_TO,
 815                 .end   = WM831X_IRQ_WDOG_TO,
 816                 .flags = IORESOURCE_IRQ,
 817         },
 818 };
 819
 820 static struct mfd_cell wm8310_devs[] = {
 821         {
 822                 .name = "wm831x-backup",
 823         },
 824         {
 825                 .name = "wm831x-buckv",
 826                 .id = 1,
 827                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
 828                 .resources = wm831x_dcdc1_resources,
 829         },
 830         {
 831                 .name = "wm831x-buckv",
 832                 .id = 2,
 833                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
 834                 .resources = wm831x_dcdc2_resources,
 835         },
 836         {
 837                 .name = "wm831x-buckp",
 838                 .id = 3,
 839                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
 840                 .resources = wm831x_dcdc3_resources,
 841         },
 842         {
 843                 .name = "wm831x-boostp",
 844                 .id = 4,
 845                 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
 846                 .resources = wm831x_dcdc4_resources,
 847         },
 848         {
 849                 .name = "wm831x-epe",
 850                 .id = 1,
 851         },
 852         {
 853                 .name = "wm831x-epe",
 854                 .id = 2,
 855         },
 856         {
 857                 .name = "wm831x-gpio",
 858                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
 859                 .resources = wm831x_gpio_resources,
 860         },
 861         {
 862                 .name = "wm831x-hwmon",
 863         },
 864         {
 865                 .name = "wm831x-isink",
 866                 .id = 1,
 867                 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
 868                 .resources = wm831x_isink1_resources,
 869         },
 870         {
 871                 .name = "wm831x-isink",
 872                 .id = 2,
 873                 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
 874                 .resources = wm831x_isink2_resources,
 875         },
 876         {
 877                 .name = "wm831x-ldo",
 878                 .id = 1,
 879                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
 880                 .resources = wm831x_ldo1_resources,
 881         },
 882         {
 883                 .name = "wm831x-ldo",
 884                 .id = 2,
 885                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
 886                 .resources = wm831x_ldo2_resources,
 887         },
 888         {
 889                 .name = "wm831x-ldo",
 890                 .id = 3,
 891                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
 892                 .resources = wm831x_ldo3_resources,
 893         },
 894         {
 895                 .name = "wm831x-ldo",
 896                 .id = 4,
 897                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
 898                 .resources = wm831x_ldo4_resources,
 899         },
 900         {
 901                 .name = "wm831x-ldo",
 902                 .id = 5,
 903                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
 904                 .resources = wm831x_ldo5_resources,
 905         },
 906         {
 907                 .name = "wm831x-ldo",
 908                 .id = 6,
 909                 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
 910                 .resources = wm831x_ldo6_resources,
 911         },
 912         {
 913                 .name = "wm831x-aldo",
 914                 .id = 7,
 915                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
 916                 .resources = wm831x_ldo7_resources,
 917         },
 918         {
 919                 .name = "wm831x-aldo",
 920                 .id = 8,
 921                 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
 922                 .resources = wm831x_ldo8_resources,
 923         },
 924         {
 925                 .name = "wm831x-aldo",
 926                 .id = 9,
 927                 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
 928                 .resources = wm831x_ldo9_resources,
 929         },
 930         {
 931                 .name = "wm831x-aldo",
 932                 .id = 10,
 933                 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
 934                 .resources = wm831x_ldo10_resources,
 935         },
 936         {
 937                 .name = "wm831x-alive-ldo",
 938                 .id = 11,
 939                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
 940                 .resources = wm831x_ldo11_resources,
 941         },
 942         {
 943                 .name = "wm831x-on",
 944                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
 945                 .resources = wm831x_on_resources,
 946         },
 947         {
 948                 .name = "wm831x-power",
 949                 .num_resources = ARRAY_SIZE(wm831x_power_resources),
 950                 .resources = wm831x_power_resources,
 951         },
 952         {
 953                 .name = "wm831x-rtc",
 954                 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
 955                 .resources = wm831x_rtc_resources,
 956         },
 957         {
 958                 .name = "wm831x-status",
 959                 .id = 1,
 960                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
 961                 .resources = wm831x_status1_resources,
 962         },
 963         {
 964                 .name = "wm831x-status",
 965                 .id = 2,
 966                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
 967                 .resources = wm831x_status2_resources,
 968         },
 969         {
 970                 .name = "wm831x-watchdog",
 971                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
 972                 .resources = wm831x_wdt_resources,
 973         },
 974 };
 975
 976 static struct mfd_cell wm8311_devs[] = {
 977         {
 978                 .name = "wm831x-backup",
 979         },
 980         {
 981                 .name = "wm831x-buckv",
 982                 .id = 1,
 983                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
 984                 .resources = wm831x_dcdc1_resources,
 985         },
 986         {
 987                 .name = "wm831x-buckv",
 988                 .id = 2,
 989                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
 990                 .resources = wm831x_dcdc2_resources,
 991         },
 992         {
 993                 .name = "wm831x-buckp",
 994                 .id = 3,
 995                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
 996                 .resources = wm831x_dcdc3_resources,
 997         },
 998         {
 999                 .name = "wm831x-boostp",
1000                 .id = 4,
1001                 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1002                 .resources = wm831x_dcdc4_resources,
1003         },
1004         {
1005                 .name = "wm831x-epe",
1006                 .id = 1,
1007         },
1008         {
1009                 .name = "wm831x-epe",
1010                 .id = 2,
1011         },
1012         {
1013                 .name = "wm831x-gpio",
1014                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1015                 .resources = wm831x_gpio_resources,
1016         },
1017         {
1018                 .name = "wm831x-hwmon",
1019         },
1020         {
1021                 .name = "wm831x-isink",
1022                 .id = 1,
1023                 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1024                 .resources = wm831x_isink1_resources,
1025         },
1026         {
1027                 .name = "wm831x-isink",
1028                 .id = 2,
1029                 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1030                 .resources = wm831x_isink2_resources,
1031         },
1032         {
1033                 .name = "wm831x-ldo",
1034                 .id = 1,
1035                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1036                 .resources = wm831x_ldo1_resources,
1037         },
1038         {
1039                 .name = "wm831x-ldo",
1040                 .id = 2,
1041                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1042                 .resources = wm831x_ldo2_resources,
1043         },
1044         {
1045                 .name = "wm831x-ldo",
1046                 .id = 3,
1047                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1048                 .resources = wm831x_ldo3_resources,
1049         },
1050         {
1051                 .name = "wm831x-ldo",
1052                 .id = 4,
1053                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1054                 .resources = wm831x_ldo4_resources,
1055         },
1056         {
1057                 .name = "wm831x-ldo",
1058                 .id = 5,
1059                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1060                 .resources = wm831x_ldo5_resources,
1061         },
1062         {
1063                 .name = "wm831x-aldo",
1064                 .id = 7,
1065                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1066                 .resources = wm831x_ldo7_resources,
1067         },
1068         {
1069                 .name = "wm831x-alive-ldo",
1070                 .id = 11,
1071                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1072                 .resources = wm831x_ldo11_resources,
1073         },
1074         {
1075                 .name = "wm831x-on",
1076                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1077                 .resources = wm831x_on_resources,
1078         },
1079         {
1080                 .name = "wm831x-power",
1081                 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1082                 .resources = wm831x_power_resources,
1083         },
1084         {
1085                 .name = "wm831x-rtc",
1086                 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1087                 .resources = wm831x_rtc_resources,
1088         },
1089         {
1090                 .name = "wm831x-status",
1091                 .id = 1,
1092                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1093                 .resources = wm831x_status1_resources,
1094         },
1095         {
1096                 .name = "wm831x-status",
1097                 .id = 2,
1098                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1099                 .resources = wm831x_status2_resources,
1100         },
1101         {
1102                 .name = "wm831x-touch",
1103                 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1104                 .resources = wm831x_touch_resources,
1105         },
1106         {
1107                 .name = "wm831x-watchdog",
1108                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1109                 .resources = wm831x_wdt_resources,
1110         },
1111 };
1112
1113 static struct mfd_cell wm8312_devs[] = {
1114         {
1115                 .name = "wm831x-backup",
1116         },
1117         {
1118                 .name = "wm831x-buckv",
1119                 .id = 1,
1120                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1121                 .resources = wm831x_dcdc1_resources,
1122         },
1123         {
1124                 .name = "wm831x-buckv",
1125                 .id = 2,
1126                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1127                 .resources = wm831x_dcdc2_resources,
1128         },
1129         {
1130                 .name = "wm831x-buckp",
1131                 .id = 3,
1132                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1133                 .resources = wm831x_dcdc3_resources,
1134         },
1135         {
1136                 .name = "wm831x-boostp",
1137                 .id = 4,
1138                 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1139                 .resources = wm831x_dcdc4_resources,
1140         },
1141         {
1142                 .name = "wm831x-epe",
1143                 .id = 1,
1144         },
1145         {
1146                 .name = "wm831x-epe",
1147                 .id = 2,
1148         },
1149         {
1150                 .name = "wm831x-gpio",
1151                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1152                 .resources = wm831x_gpio_resources,
1153         },
1154         {
1155                 .name = "wm831x-hwmon",
1156         },
1157         {
1158                 .name = "wm831x-isink",
1159                 .id = 1,
1160                 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1161                 .resources = wm831x_isink1_resources,
1162         },
1163         {
1164                 .name = "wm831x-isink",
1165                 .id = 2,
1166                 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1167                 .resources = wm831x_isink2_resources,
1168         },
1169         {
1170                 .name = "wm831x-ldo",
1171                 .id = 1,
1172                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1173                 .resources = wm831x_ldo1_resources,
1174         },
1175         {
1176                 .name = "wm831x-ldo",
1177                 .id = 2,
1178                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1179                 .resources = wm831x_ldo2_resources,
1180         },
1181         {
1182                 .name = "wm831x-ldo",
1183                 .id = 3,
1184                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1185                 .resources = wm831x_ldo3_resources,
1186         },
1187         {
1188                 .name = "wm831x-ldo",
1189                 .id = 4,
1190                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1191                 .resources = wm831x_ldo4_resources,
1192         },
1193         {
1194                 .name = "wm831x-ldo",
1195                 .id = 5,
1196                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1197                 .resources = wm831x_ldo5_resources,
1198         },
1199         {
1200                 .name = "wm831x-ldo",
1201                 .id = 6,
1202                 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1203                 .resources = wm831x_ldo6_resources,
1204         },
1205         {
1206                 .name = "wm831x-aldo",
1207                 .id = 7,
1208                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1209                 .resources = wm831x_ldo7_resources,
1210         },
1211         {
1212                 .name = "wm831x-aldo",
1213                 .id = 8,
1214                 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1215                 .resources = wm831x_ldo8_resources,
1216         },
1217         {
1218                 .name = "wm831x-aldo",
1219                 .id = 9,
1220                 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1221                 .resources = wm831x_ldo9_resources,
1222         },
1223         {
1224                 .name = "wm831x-aldo",
1225                 .id = 10,
1226                 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1227                 .resources = wm831x_ldo10_resources,
1228         },
1229         {
1230                 .name = "wm831x-alive-ldo",
1231                 .id = 11,
1232                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1233                 .resources = wm831x_ldo11_resources,
1234         },
1235         {
1236                 .name = "wm831x-on",
1237                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1238                 .resources = wm831x_on_resources,
1239         },
1240         {
1241                 .name = "wm831x-power",
1242                 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1243                 .resources = wm831x_power_resources,
1244         },
1245         {
1246                 .name = "wm831x-rtc",
1247                 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1248                 .resources = wm831x_rtc_resources,
1249         },
1250         {
1251                 .name = "wm831x-status",
1252                 .id = 1,
1253                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1254                 .resources = wm831x_status1_resources,
1255         },
1256         {
1257                 .name = "wm831x-status",
1258                 .id = 2,
1259                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1260                 .resources = wm831x_status2_resources,
1261         },
1262         {
1263                 .name = "wm831x-touch",
1264                 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1265                 .resources = wm831x_touch_resources,
1266         },
1267         {
1268                 .name = "wm831x-watchdog",
1269                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1270                 .resources = wm831x_wdt_resources,
1271         },
1272 };
1273
1274 static struct mfd_cell wm8320_devs[] = {
1275         {
1276                 .name = "wm831x-backup",
1277         },
1278         {
1279                 .name = "wm831x-buckv",
1280                 .id = 1,
1281                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1282                 .resources = wm831x_dcdc1_resources,
1283         },
1284         {
1285                 .name = "wm831x-buckv",
1286                 .id = 2,
1287                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1288                 .resources = wm831x_dcdc2_resources,
1289         },
1290         {
1291                 .name = "wm831x-buckp",
1292                 .id = 3,
1293                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1294                 .resources = wm831x_dcdc3_resources,
1295         },
1296         {
1297                 .name = "wm831x-buckp",
1298                 .id = 4,
1299                 .num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
1300                 .resources = wm8320_dcdc4_buck_resources,
1301         },
1302         {
1303                 .name = "wm831x-gpio",
1304                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1305                 .resources = wm831x_gpio_resources,
1306         },
1307         {
1308                 .name = "wm831x-hwmon",
1309         },
1310         {
1311                 .name = "wm831x-ldo",
1312                 .id = 1,
1313                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1314                 .resources = wm831x_ldo1_resources,
1315         },
1316         {
1317                 .name = "wm831x-ldo",
1318                 .id = 2,
1319                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1320                 .resources = wm831x_ldo2_resources,
1321         },
1322         {
1323                 .name = "wm831x-ldo",
1324                 .id = 3,
1325                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1326                 .resources = wm831x_ldo3_resources,
1327         },
1328         {
1329                 .name = "wm831x-ldo",
1330                 .id = 4,
1331                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1332                 .resources = wm831x_ldo4_resources,
1333         },
1334         {
1335                 .name = "wm831x-ldo",
1336                 .id = 5,
1337                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1338                 .resources = wm831x_ldo5_resources,
1339         },
1340         {
1341                 .name = "wm831x-ldo",
1342                 .id = 6,
1343                 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1344                 .resources = wm831x_ldo6_resources,
1345         },
1346         {
1347                 .name = "wm831x-aldo",
1348                 .id = 7,
1349                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1350                 .resources = wm831x_ldo7_resources,
1351         },
1352         {
1353                 .name = "wm831x-aldo",
1354                 .id = 8,
1355                 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1356                 .resources = wm831x_ldo8_resources,
1357         },
1358         {
1359                 .name = "wm831x-aldo",
1360                 .id = 9,
1361                 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1362                 .resources = wm831x_ldo9_resources,
1363         },
1364         {
1365                 .name = "wm831x-aldo",
1366                 .id = 10,
1367                 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1368                 .resources = wm831x_ldo10_resources,
1369         },
1370         {
1371                 .name = "wm831x-alive-ldo",
1372                 .id = 11,
1373                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1374                 .resources = wm831x_ldo11_resources,
1375         },
1376         {
1377                 .name = "wm831x-on",
1378                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1379                 .resources = wm831x_on_resources,
1380         },
1381         {
1382                 .name = "wm831x-rtc",
1383                 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1384                 .resources = wm831x_rtc_resources,
1385         },
1386         {
1387                 .name = "wm831x-status",
1388                 .id = 1,
1389                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1390                 .resources = wm831x_status1_resources,
1391         },
1392         {
1393                 .name = "wm831x-status",
1394                 .id = 2,
1395                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1396                 .resources = wm831x_status2_resources,
1397         },
1398         {
1399                 .name = "wm831x-watchdog",
1400                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1401                 .resources = wm831x_wdt_resources,
1402         },
1403 };
1404
1405 static struct mfd_cell backlight_devs[] = {
1406         {
1407                 .name = "wm831x-backlight",
1408         },
1409 };
1410
1411 /*
1412  * Instantiate the generic non-control parts of the device.
1413  */
1414 static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
1415 {
1416         struct wm831x_pdata *pdata = wm831x->dev->platform_data;
1417         int rev;
1418         enum wm831x_parent parent;
1419         int ret;
1420
1421         mutex_init(&wm831x->io_lock);
1422         mutex_init(&wm831x->key_lock);
1423         mutex_init(&wm831x->auxadc_lock);
1424         init_completion(&wm831x->auxadc_done);
1425         dev_set_drvdata(wm831x->dev, wm831x);
1426
1427         ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1428         if (ret < 0) {
1429                 dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1430                 goto err;
1431         }
1432         if (ret != 0x6204) {
1433                 dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1434                 ret = -EINVAL;
1435                 goto err;
1436         }
1437
1438         ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1439         if (ret < 0) {
1440                 dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1441                 goto err;
1442         }
1443         rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1444
1445         ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1446         if (ret < 0) {
1447                 dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1448                 goto err;
1449         }
1450
1451         /* Some engineering samples do not have the ID set, rely on
1452          * the device being registered correctly.
1453          */
1454         if (ret == 0) {
1455                 dev_info(wm831x->dev, "Device is an engineering sample\n");
1456                 ret = id;
1457         }
1458
1459         switch (ret) {
1460         case WM8310:
1461                 parent = WM8310;
1462                 wm831x->num_gpio = 16;
1463                 if (rev > 0) {
1464                         wm831x->has_gpio_ena = 1;
1465                         wm831x->has_cs_sts = 1;
1466                 }
1467
1468                 dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
1469                 break;
1470
1471         case WM8311:
1472                 parent = WM8311;
1473                 wm831x->num_gpio = 16;
1474                 if (rev > 0) {
1475                         wm831x->has_gpio_ena = 1;
1476                         wm831x->has_cs_sts = 1;
1477                 }
1478
1479                 dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
1480                 break;
1481
1482         case WM8312:
1483                 parent = WM8312;
1484                 wm831x->num_gpio = 16;
1485                 if (rev > 0) {
1486                         wm831x->has_gpio_ena = 1;
1487                         wm831x->has_cs_sts = 1;
1488                 }
1489
1490                 dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
1491                 break;
1492
1493         case WM8320:
1494                 parent = WM8320;
1495                 wm831x->num_gpio = 12;
1496                 dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);
1497                 break;
1498
1499         default:
1500                 dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1501                 ret = -EINVAL;
1502                 goto err;
1503         }
1504
1505         /* This will need revisiting in future but is OK for all
1506          * current parts.
1507          */
1508         if (parent != id)
1509                 dev_warn(wm831x->dev, "Device was registered as a WM%lx\n",
1510                          id);
1511
1512         /* Bootstrap the user key */
1513         ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1514         if (ret < 0) {
1515                 dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1516                 goto err;
1517         }
1518         if (ret != 0) {
1519                 dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1520                          ret);
1521                 wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1522         }
1523         wm831x->locked = 1;
1524
1525         if (pdata && pdata->pre_init) {
1526                 ret = pdata->pre_init(wm831x);
1527                 if (ret != 0) {
1528                         dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1529                         goto err;
1530                 }
1531         }
1532
1533         ret = wm831x_irq_init(wm831x, irq);
1534         if (ret != 0)
1535                 goto err;
1536
1537         if (wm831x->irq_base) {
1538                 ret = request_threaded_irq(wm831x->irq_base +
1539                                            WM831X_IRQ_AUXADC_DATA,
1540                                            NULL, wm831x_auxadc_irq, 0,
1541                                            "auxadc", wm831x);
1542                 if (ret < 0)
1543                         dev_err(wm831x->dev, "AUXADC IRQ request failed: %d\n",
1544                                 ret);
1545         }
1546
1547         /* The core device is up, instantiate the subdevices. */
1548         switch (parent) {
1549         case WM8310:
1550                 ret = mfd_add_devices(wm831x->dev, -1,
1551                                       wm8310_devs, ARRAY_SIZE(wm8310_devs),
1552                                       NULL, wm831x->irq_base);
1553                 break;
1554
1555         case WM8311:
1556                 ret = mfd_add_devices(wm831x->dev, -1,
1557                                       wm8311_devs, ARRAY_SIZE(wm8311_devs),
1558                                       NULL, wm831x->irq_base);
1559                 break;
1560
1561         case WM8312:
1562                 ret = mfd_add_devices(wm831x->dev, -1,
1563                                       wm8312_devs, ARRAY_SIZE(wm8312_devs),
1564                                       NULL, wm831x->irq_base);
1565                 break;
1566
1567         case WM8320:
1568                 ret = mfd_add_devices(wm831x->dev, -1,
1569                                       wm8320_devs, ARRAY_SIZE(wm8320_devs),
1570                                       NULL, 0);
1571                 break;
1572
1573         default:
1574                 /* If this happens the bus probe function is buggy */
1575                 BUG();
1576         }
1577
1578         if (ret != 0) {
1579                 dev_err(wm831x->dev, "Failed to add children\n");
1580                 goto err_irq;
1581         }
1582
1583         if (pdata && pdata->backlight) {
1584                 /* Treat errors as non-critical */
1585                 ret = mfd_add_devices(wm831x->dev, -1, backlight_devs,
1586                                       ARRAY_SIZE(backlight_devs), NULL,
1587                                       wm831x->irq_base);
1588                 if (ret < 0)
1589                         dev_err(wm831x->dev, "Failed to add backlight: %d\n",
1590                                 ret);
1591         }
1592
1593         wm831x_otp_init(wm831x);
1594
1595         if (pdata && pdata->post_init) {
1596                 ret = pdata->post_init(wm831x);
1597                 if (ret != 0) {
1598                         dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1599                         goto err_irq;
1600                 }
1601         }
1602
1603         return 0;
1604
1605 err_irq:
1606         wm831x_irq_exit(wm831x);
1607 err:
1608         mfd_remove_devices(wm831x->dev);
1609         kfree(wm831x);
1610         return ret;
1611 }
1612
1613 static void wm831x_device_exit(struct wm831x *wm831x)
1614 {
1615         wm831x_otp_exit(wm831x);
1616         mfd_remove_devices(wm831x->dev);
1617         if (wm831x->irq_base)
1618                 free_irq(wm831x->irq_base + WM831X_IRQ_AUXADC_DATA, wm831x);
1619         wm831x_irq_exit(wm831x);
1620         kfree(wm831x);
1621 }
1622
1623 static int wm831x_i2c_read_device(struct wm831x *wm831x, unsigned short reg,
1624                                   int bytes, void *dest)
1625 {
1626         struct i2c_client *i2c = wm831x->control_data;
1627         int ret;
1628         u16 r = cpu_to_be16(reg);
1629
1630         ret = i2c_master_send(i2c, (unsigned char *)&r, 2);
1631         if (ret < 0)
1632                 return ret;
1633         if (ret != 2)
1634                 return -EIO;
1635
1636         ret = i2c_master_recv(i2c, dest, bytes);
1637         if (ret < 0)
1638                 return ret;
1639         if (ret != bytes)
1640                 return -EIO;
1641         return 0;
1642 }
1643
1644 /* Currently we allocate the write buffer on the stack; this is OK for
1645  * small writes - if we need to do large writes this will need to be
1646  * revised.
1647  */
1648 static int wm831x_i2c_write_device(struct wm831x *wm831x, unsigned short reg,
1649                                    int bytes, void *src)
1650 {
1651         struct i2c_client *i2c = wm831x->control_data;
1652         unsigned char msg[bytes + 2];
1653         int ret;
1654
1655         reg = cpu_to_be16(reg);
1656         memcpy(&msg[0], &reg, 2);
1657         memcpy(&msg[2], src, bytes);
1658
1659         ret = i2c_master_send(i2c, msg, bytes + 2);
1660         if (ret < 0)
1661                 return ret;
1662         if (ret < bytes + 2)
1663                 return -EIO;
1664
1665         return 0;
1666 }
1667
1668 static int wm831x_i2c_probe(struct i2c_client *i2c,
1669                             const struct i2c_device_id *id)
1670 {
1671         struct wm831x *wm831x;
1672
1673         wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
1674         if (wm831x == NULL) {
1675                 kfree(i2c);
1676                 return -ENOMEM;
1677         }
1678
1679         i2c_set_clientdata(i2c, wm831x);
1680         wm831x->dev = &i2c->dev;
1681         wm831x->control_data = i2c;
1682         wm831x->read_dev = wm831x_i2c_read_device;
1683         wm831x->write_dev = wm831x_i2c_write_device;
1684
1685         return wm831x_device_init(wm831x, id->driver_data, i2c->irq);
1686 }
1687
1688 static int wm831x_i2c_remove(struct i2c_client *i2c)
1689 {
1690         struct wm831x *wm831x = i2c_get_clientdata(i2c);
1691
1692         wm831x_device_exit(wm831x);
1693
1694         return 0;
1695 }
1696
1697 static const struct i2c_device_id wm831x_i2c_id[] = {
1698         { "wm8310", WM8310 },
1699         { "wm8311", WM8311 },
1700         { "wm8312", WM8312 },
1701         { "wm8320", WM8320 },
1702         { }
1703 };
1704 MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
1705
1706
1707 static struct i2c_driver wm831x_i2c_driver = {
1708         .driver = {
1709                    .name = "wm831x",
1710                    .owner = THIS_MODULE,
1711         },
1712         .probe = wm831x_i2c_probe,
1713         .remove = wm831x_i2c_remove,
1714         .id_table = wm831x_i2c_id,
1715 };
1716
1717 static int __init wm831x_i2c_init(void)
1718 {
1719         int ret;
1720
1721         ret = i2c_add_driver(&wm831x_i2c_driver);
1722         if (ret != 0)
1723                 pr_err("Failed to register wm831x I2C driver: %d\n", ret);
1724
1725         return ret;
1726 }
1727 subsys_initcall(wm831x_i2c_init);
1728
1729 static void __exit wm831x_i2c_exit(void)
1730 {
1731         i2c_del_driver(&wm831x_i2c_driver);
1732 }
1733 module_exit(wm831x_i2c_exit);
1734
1735 MODULE_DESCRIPTION("I2C support for the WM831X AudioPlus PMIC");
1736 MODULE_LICENSE("GPL");
1737 MODULE_AUTHOR("Mark Brown");