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         /* If an interrupt arrived late clean up after it */
 353         try_wait_for_completion(&wm831x->auxadc_done);
 354
 355         /* Ignore the result to allow us to soldier on without IRQ hookup */
 356         wait_for_completion_timeout(&wm831x->auxadc_done, msecs_to_jiffies(5));
 357
 358         ret = wm831x_reg_read(wm831x, WM831X_AUXADC_CONTROL);
 359         if (ret < 0) {
 360                 dev_err(wm831x->dev, "AUXADC status read failed: %d\n", ret);
 361                 goto disable;
 362         }
 363
 364         if (ret & WM831X_AUX_CVT_ENA) {
 365                 dev_err(wm831x->dev, "Timed out reading AUXADC\n");
 366                 ret = -EBUSY;
 367                 goto disable;
 368         }
 369
 370         ret = wm831x_reg_read(wm831x, WM831X_AUXADC_DATA);
 371         if (ret < 0) {
 372                 dev_err(wm831x->dev, "Failed to read AUXADC data: %d\n", ret);
 373         } else {
 374                 src = ((ret & WM831X_AUX_DATA_SRC_MASK)
 375                        >> WM831X_AUX_DATA_SRC_SHIFT) - 1;
 376
 377                 if (src == 14)
 378                         src = WM831X_AUX_CAL;
 379
 380                 if (src != input) {
 381                         dev_err(wm831x->dev, "Data from source %d not %d\n",
 382                                 src, input);
 383                         ret = -EINVAL;
 384                 } else {
 385                         ret &= WM831X_AUX_DATA_MASK;
 386                 }
 387         }
 388
 389 disable:
 390         wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, WM831X_AUX_ENA, 0);
 391 out:
 392         mutex_unlock(&wm831x->auxadc_lock);
 393         return ret;
 394 }
 395 EXPORT_SYMBOL_GPL(wm831x_auxadc_read);
 396
 397 static irqreturn_t wm831x_auxadc_irq(int irq, void *irq_data)
 398 {
 399         struct wm831x *wm831x = irq_data;
 400
 401         complete(&wm831x->auxadc_done);
 402
 403         return IRQ_HANDLED;
 404 }
 405
 406 /**
 407  * wm831x_auxadc_read_uv: Read a voltage from the WM831x AUXADC
 408  *
 409  * @wm831x: Device to read from.
 410  * @input: AUXADC input to read.
 411  */
 412 int wm831x_auxadc_read_uv(struct wm831x *wm831x, enum wm831x_auxadc input)
 413 {
 414         int ret;
 415
 416         ret = wm831x_auxadc_read(wm831x, input);
 417         if (ret < 0)
 418                 return ret;
 419
 420         ret *= 1465;
 421
 422         return ret;
 423 }
 424 EXPORT_SYMBOL_GPL(wm831x_auxadc_read_uv);
 425
 426 static struct resource wm831x_dcdc1_resources[] = {
 427         {
 428                 .start = WM831X_DC1_CONTROL_1,
 429                 .end   = WM831X_DC1_DVS_CONTROL,
 430                 .flags = IORESOURCE_IO,
 431         },
 432         {
 433                 .name  = "UV",
 434                 .start = WM831X_IRQ_UV_DC1,
 435                 .end   = WM831X_IRQ_UV_DC1,
 436                 .flags = IORESOURCE_IRQ,
 437         },
 438         {
 439                 .name  = "HC",
 440                 .start = WM831X_IRQ_HC_DC1,
 441                 .end   = WM831X_IRQ_HC_DC1,
 442                 .flags = IORESOURCE_IRQ,
 443         },
 444 };
 445
 446
 447 static struct resource wm831x_dcdc2_resources[] = {
 448         {
 449                 .start = WM831X_DC2_CONTROL_1,
 450                 .end   = WM831X_DC2_DVS_CONTROL,
 451                 .flags = IORESOURCE_IO,
 452         },
 453         {
 454                 .name  = "UV",
 455                 .start = WM831X_IRQ_UV_DC2,
 456                 .end   = WM831X_IRQ_UV_DC2,
 457                 .flags = IORESOURCE_IRQ,
 458         },
 459         {
 460                 .name  = "HC",
 461                 .start = WM831X_IRQ_HC_DC2,
 462                 .end   = WM831X_IRQ_HC_DC2,
 463                 .flags = IORESOURCE_IRQ,
 464         },
 465 };
 466
 467 static struct resource wm831x_dcdc3_resources[] = {
 468         {
 469                 .start = WM831X_DC3_CONTROL_1,
 470                 .end   = WM831X_DC3_SLEEP_CONTROL,
 471                 .flags = IORESOURCE_IO,
 472         },
 473         {
 474                 .name  = "UV",
 475                 .start = WM831X_IRQ_UV_DC3,
 476                 .end   = WM831X_IRQ_UV_DC3,
 477                 .flags = IORESOURCE_IRQ,
 478         },
 479 };
 480
 481 static struct resource wm831x_dcdc4_resources[] = {
 482         {
 483                 .start = WM831X_DC4_CONTROL,
 484                 .end   = WM831X_DC4_SLEEP_CONTROL,
 485                 .flags = IORESOURCE_IO,
 486         },
 487         {
 488                 .name  = "UV",
 489                 .start = WM831X_IRQ_UV_DC4,
 490                 .end   = WM831X_IRQ_UV_DC4,
 491                 .flags = IORESOURCE_IRQ,
 492         },
 493 };
 494
 495 static struct resource wm8320_dcdc4_buck_resources[] = {
 496         {
 497                 .start = WM831X_DC4_CONTROL,
 498                 .end   = WM832X_DC4_SLEEP_CONTROL,
 499                 .flags = IORESOURCE_IO,
 500         },
 501         {
 502                 .name  = "UV",
 503                 .start = WM831X_IRQ_UV_DC4,
 504                 .end   = WM831X_IRQ_UV_DC4,
 505                 .flags = IORESOURCE_IRQ,
 506         },
 507 };
 508
 509 static struct resource wm831x_gpio_resources[] = {
 510         {
 511                 .start = WM831X_IRQ_GPIO_1,
 512                 .end   = WM831X_IRQ_GPIO_16,
 513                 .flags = IORESOURCE_IRQ,
 514         },
 515 };
 516
 517 static struct resource wm831x_isink1_resources[] = {
 518         {
 519                 .start = WM831X_CURRENT_SINK_1,
 520                 .end   = WM831X_CURRENT_SINK_1,
 521                 .flags = IORESOURCE_IO,
 522         },
 523         {
 524                 .start = WM831X_IRQ_CS1,
 525                 .end   = WM831X_IRQ_CS1,
 526                 .flags = IORESOURCE_IRQ,
 527         },
 528 };
 529
 530 static struct resource wm831x_isink2_resources[] = {
 531         {
 532                 .start = WM831X_CURRENT_SINK_2,
 533                 .end   = WM831X_CURRENT_SINK_2,
 534                 .flags = IORESOURCE_IO,
 535         },
 536         {
 537                 .start = WM831X_IRQ_CS2,
 538                 .end   = WM831X_IRQ_CS2,
 539                 .flags = IORESOURCE_IRQ,
 540         },
 541 };
 542
 543 static struct resource wm831x_ldo1_resources[] = {
 544         {
 545                 .start = WM831X_LDO1_CONTROL,
 546                 .end   = WM831X_LDO1_SLEEP_CONTROL,
 547                 .flags = IORESOURCE_IO,
 548         },
 549         {
 550                 .name  = "UV",
 551                 .start = WM831X_IRQ_UV_LDO1,
 552                 .end   = WM831X_IRQ_UV_LDO1,
 553                 .flags = IORESOURCE_IRQ,
 554         },
 555 };
 556
 557 static struct resource wm831x_ldo2_resources[] = {
 558         {
 559                 .start = WM831X_LDO2_CONTROL,
 560                 .end   = WM831X_LDO2_SLEEP_CONTROL,
 561                 .flags = IORESOURCE_IO,
 562         },
 563         {
 564                 .name  = "UV",
 565                 .start = WM831X_IRQ_UV_LDO2,
 566                 .end   = WM831X_IRQ_UV_LDO2,
 567                 .flags = IORESOURCE_IRQ,
 568         },
 569 };
 570
 571 static struct resource wm831x_ldo3_resources[] = {
 572         {
 573                 .start = WM831X_LDO3_CONTROL,
 574                 .end   = WM831X_LDO3_SLEEP_CONTROL,
 575                 .flags = IORESOURCE_IO,
 576         },
 577         {
 578                 .name  = "UV",
 579                 .start = WM831X_IRQ_UV_LDO3,
 580                 .end   = WM831X_IRQ_UV_LDO3,
 581                 .flags = IORESOURCE_IRQ,
 582         },
 583 };
 584
 585 static struct resource wm831x_ldo4_resources[] = {
 586         {
 587                 .start = WM831X_LDO4_CONTROL,
 588                 .end   = WM831X_LDO4_SLEEP_CONTROL,
 589                 .flags = IORESOURCE_IO,
 590         },
 591         {
 592                 .name  = "UV",
 593                 .start = WM831X_IRQ_UV_LDO4,
 594                 .end   = WM831X_IRQ_UV_LDO4,
 595                 .flags = IORESOURCE_IRQ,
 596         },
 597 };
 598
 599 static struct resource wm831x_ldo5_resources[] = {
 600         {
 601                 .start = WM831X_LDO5_CONTROL,
 602                 .end   = WM831X_LDO5_SLEEP_CONTROL,
 603                 .flags = IORESOURCE_IO,
 604         },
 605         {
 606                 .name  = "UV",
 607                 .start = WM831X_IRQ_UV_LDO5,
 608                 .end   = WM831X_IRQ_UV_LDO5,
 609                 .flags = IORESOURCE_IRQ,
 610         },
 611 };
 612
 613 static struct resource wm831x_ldo6_resources[] = {
 614         {
 615                 .start = WM831X_LDO6_CONTROL,
 616                 .end   = WM831X_LDO6_SLEEP_CONTROL,
 617                 .flags = IORESOURCE_IO,
 618         },
 619         {
 620                 .name  = "UV",
 621                 .start = WM831X_IRQ_UV_LDO6,
 622                 .end   = WM831X_IRQ_UV_LDO6,
 623                 .flags = IORESOURCE_IRQ,
 624         },
 625 };
 626
 627 static struct resource wm831x_ldo7_resources[] = {
 628         {
 629                 .start = WM831X_LDO7_CONTROL,
 630                 .end   = WM831X_LDO7_SLEEP_CONTROL,
 631                 .flags = IORESOURCE_IO,
 632         },
 633         {
 634                 .name  = "UV",
 635                 .start = WM831X_IRQ_UV_LDO7,
 636                 .end   = WM831X_IRQ_UV_LDO7,
 637                 .flags = IORESOURCE_IRQ,
 638         },
 639 };
 640
 641 static struct resource wm831x_ldo8_resources[] = {
 642         {
 643                 .start = WM831X_LDO8_CONTROL,
 644                 .end   = WM831X_LDO8_SLEEP_CONTROL,
 645                 .flags = IORESOURCE_IO,
 646         },
 647         {
 648                 .name  = "UV",
 649                 .start = WM831X_IRQ_UV_LDO8,
 650                 .end   = WM831X_IRQ_UV_LDO8,
 651                 .flags = IORESOURCE_IRQ,
 652         },
 653 };
 654
 655 static struct resource wm831x_ldo9_resources[] = {
 656         {
 657                 .start = WM831X_LDO9_CONTROL,
 658                 .end   = WM831X_LDO9_SLEEP_CONTROL,
 659                 .flags = IORESOURCE_IO,
 660         },
 661         {
 662                 .name  = "UV",
 663                 .start = WM831X_IRQ_UV_LDO9,
 664                 .end   = WM831X_IRQ_UV_LDO9,
 665                 .flags = IORESOURCE_IRQ,
 666         },
 667 };
 668
 669 static struct resource wm831x_ldo10_resources[] = {
 670         {
 671                 .start = WM831X_LDO10_CONTROL,
 672                 .end   = WM831X_LDO10_SLEEP_CONTROL,
 673                 .flags = IORESOURCE_IO,
 674         },
 675         {
 676                 .name  = "UV",
 677                 .start = WM831X_IRQ_UV_LDO10,
 678                 .end   = WM831X_IRQ_UV_LDO10,
 679                 .flags = IORESOURCE_IRQ,
 680         },
 681 };
 682
 683 static struct resource wm831x_ldo11_resources[] = {
 684         {
 685                 .start = WM831X_LDO11_ON_CONTROL,
 686                 .end   = WM831X_LDO11_SLEEP_CONTROL,
 687                 .flags = IORESOURCE_IO,
 688         },
 689 };
 690
 691 static struct resource wm831x_on_resources[] = {
 692         {
 693                 .start = WM831X_IRQ_ON,
 694                 .end   = WM831X_IRQ_ON,
 695                 .flags = IORESOURCE_IRQ,
 696         },
 697 };
 698
 699
 700 static struct resource wm831x_power_resources[] = {
 701         {
 702                 .name = "SYSLO",
 703                 .start = WM831X_IRQ_PPM_SYSLO,
 704                 .end   = WM831X_IRQ_PPM_SYSLO,
 705                 .flags = IORESOURCE_IRQ,
 706         },
 707         {
 708                 .name = "PWR SRC",
 709                 .start = WM831X_IRQ_PPM_PWR_SRC,
 710                 .end   = WM831X_IRQ_PPM_PWR_SRC,
 711                 .flags = IORESOURCE_IRQ,
 712         },
 713         {
 714                 .name = "USB CURR",
 715                 .start = WM831X_IRQ_PPM_USB_CURR,
 716                 .end   = WM831X_IRQ_PPM_USB_CURR,
 717                 .flags = IORESOURCE_IRQ,
 718         },
 719         {
 720                 .name = "BATT HOT",
 721                 .start = WM831X_IRQ_CHG_BATT_HOT,
 722                 .end   = WM831X_IRQ_CHG_BATT_HOT,
 723                 .flags = IORESOURCE_IRQ,
 724         },
 725         {
 726                 .name = "BATT COLD",
 727                 .start = WM831X_IRQ_CHG_BATT_COLD,
 728                 .end   = WM831X_IRQ_CHG_BATT_COLD,
 729                 .flags = IORESOURCE_IRQ,
 730         },
 731         {
 732                 .name = "BATT FAIL",
 733                 .start = WM831X_IRQ_CHG_BATT_FAIL,
 734                 .end   = WM831X_IRQ_CHG_BATT_FAIL,
 735                 .flags = IORESOURCE_IRQ,
 736         },
 737         {
 738                 .name = "OV",
 739                 .start = WM831X_IRQ_CHG_OV,
 740                 .end   = WM831X_IRQ_CHG_OV,
 741                 .flags = IORESOURCE_IRQ,
 742         },
 743         {
 744                 .name = "END",
 745                 .start = WM831X_IRQ_CHG_END,
 746                 .end   = WM831X_IRQ_CHG_END,
 747                 .flags = IORESOURCE_IRQ,
 748         },
 749         {
 750                 .name = "TO",
 751                 .start = WM831X_IRQ_CHG_TO,
 752                 .end   = WM831X_IRQ_CHG_TO,
 753                 .flags = IORESOURCE_IRQ,
 754         },
 755         {
 756                 .name = "MODE",
 757                 .start = WM831X_IRQ_CHG_MODE,
 758                 .end   = WM831X_IRQ_CHG_MODE,
 759                 .flags = IORESOURCE_IRQ,
 760         },
 761         {
 762                 .name = "START",
 763                 .start = WM831X_IRQ_CHG_START,
 764                 .end   = WM831X_IRQ_CHG_START,
 765                 .flags = IORESOURCE_IRQ,
 766         },
 767 };
 768
 769 static struct resource wm831x_rtc_resources[] = {
 770         {
 771                 .name = "PER",
 772                 .start = WM831X_IRQ_RTC_PER,
 773                 .end   = WM831X_IRQ_RTC_PER,
 774                 .flags = IORESOURCE_IRQ,
 775         },
 776         {
 777                 .name = "ALM",
 778                 .start = WM831X_IRQ_RTC_ALM,
 779                 .end   = WM831X_IRQ_RTC_ALM,
 780                 .flags = IORESOURCE_IRQ,
 781         },
 782 };
 783
 784 static struct resource wm831x_status1_resources[] = {
 785         {
 786                 .start = WM831X_STATUS_LED_1,
 787                 .end   = WM831X_STATUS_LED_1,
 788                 .flags = IORESOURCE_IO,
 789         },
 790 };
 791
 792 static struct resource wm831x_status2_resources[] = {
 793         {
 794                 .start = WM831X_STATUS_LED_2,
 795                 .end   = WM831X_STATUS_LED_2,
 796                 .flags = IORESOURCE_IO,
 797         },
 798 };
 799
 800 static struct resource wm831x_touch_resources[] = {
 801         {
 802                 .name = "TCHPD",
 803                 .start = WM831X_IRQ_TCHPD,
 804                 .end   = WM831X_IRQ_TCHPD,
 805                 .flags = IORESOURCE_IRQ,
 806         },
 807         {
 808                 .name = "TCHDATA",
 809                 .start = WM831X_IRQ_TCHDATA,
 810                 .end   = WM831X_IRQ_TCHDATA,
 811                 .flags = IORESOURCE_IRQ,
 812         },
 813 };
 814
 815 static struct resource wm831x_wdt_resources[] = {
 816         {
 817                 .start = WM831X_IRQ_WDOG_TO,
 818                 .end   = WM831X_IRQ_WDOG_TO,
 819                 .flags = IORESOURCE_IRQ,
 820         },
 821 };
 822
 823 static struct mfd_cell wm8310_devs[] = {
 824         {
 825                 .name = "wm831x-backup",
 826         },
 827         {
 828                 .name = "wm831x-buckv",
 829                 .id = 1,
 830                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
 831                 .resources = wm831x_dcdc1_resources,
 832         },
 833         {
 834                 .name = "wm831x-buckv",
 835                 .id = 2,
 836                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
 837                 .resources = wm831x_dcdc2_resources,
 838         },
 839         {
 840                 .name = "wm831x-buckp",
 841                 .id = 3,
 842                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
 843                 .resources = wm831x_dcdc3_resources,
 844         },
 845         {
 846                 .name = "wm831x-boostp",
 847                 .id = 4,
 848                 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
 849                 .resources = wm831x_dcdc4_resources,
 850         },
 851         {
 852                 .name = "wm831x-epe",
 853                 .id = 1,
 854         },
 855         {
 856                 .name = "wm831x-epe",
 857                 .id = 2,
 858         },
 859         {
 860                 .name = "wm831x-gpio",
 861                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
 862                 .resources = wm831x_gpio_resources,
 863         },
 864         {
 865                 .name = "wm831x-hwmon",
 866         },
 867         {
 868                 .name = "wm831x-isink",
 869                 .id = 1,
 870                 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
 871                 .resources = wm831x_isink1_resources,
 872         },
 873         {
 874                 .name = "wm831x-isink",
 875                 .id = 2,
 876                 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
 877                 .resources = wm831x_isink2_resources,
 878         },
 879         {
 880                 .name = "wm831x-ldo",
 881                 .id = 1,
 882                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
 883                 .resources = wm831x_ldo1_resources,
 884         },
 885         {
 886                 .name = "wm831x-ldo",
 887                 .id = 2,
 888                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
 889                 .resources = wm831x_ldo2_resources,
 890         },
 891         {
 892                 .name = "wm831x-ldo",
 893                 .id = 3,
 894                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
 895                 .resources = wm831x_ldo3_resources,
 896         },
 897         {
 898                 .name = "wm831x-ldo",
 899                 .id = 4,
 900                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
 901                 .resources = wm831x_ldo4_resources,
 902         },
 903         {
 904                 .name = "wm831x-ldo",
 905                 .id = 5,
 906                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
 907                 .resources = wm831x_ldo5_resources,
 908         },
 909         {
 910                 .name = "wm831x-ldo",
 911                 .id = 6,
 912                 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
 913                 .resources = wm831x_ldo6_resources,
 914         },
 915         {
 916                 .name = "wm831x-aldo",
 917                 .id = 7,
 918                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
 919                 .resources = wm831x_ldo7_resources,
 920         },
 921         {
 922                 .name = "wm831x-aldo",
 923                 .id = 8,
 924                 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
 925                 .resources = wm831x_ldo8_resources,
 926         },
 927         {
 928                 .name = "wm831x-aldo",
 929                 .id = 9,
 930                 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
 931                 .resources = wm831x_ldo9_resources,
 932         },
 933         {
 934                 .name = "wm831x-aldo",
 935                 .id = 10,
 936                 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
 937                 .resources = wm831x_ldo10_resources,
 938         },
 939         {
 940                 .name = "wm831x-alive-ldo",
 941                 .id = 11,
 942                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
 943                 .resources = wm831x_ldo11_resources,
 944         },
 945         {
 946                 .name = "wm831x-on",
 947                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
 948                 .resources = wm831x_on_resources,
 949         },
 950         {
 951                 .name = "wm831x-power",
 952                 .num_resources = ARRAY_SIZE(wm831x_power_resources),
 953                 .resources = wm831x_power_resources,
 954         },
 955         {
 956                 .name = "wm831x-rtc",
 957                 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
 958                 .resources = wm831x_rtc_resources,
 959         },
 960         {
 961                 .name = "wm831x-status",
 962                 .id = 1,
 963                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
 964                 .resources = wm831x_status1_resources,
 965         },
 966         {
 967                 .name = "wm831x-status",
 968                 .id = 2,
 969                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
 970                 .resources = wm831x_status2_resources,
 971         },
 972         {
 973                 .name = "wm831x-watchdog",
 974                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
 975                 .resources = wm831x_wdt_resources,
 976         },
 977 };
 978
 979 static struct mfd_cell wm8311_devs[] = {
 980         {
 981                 .name = "wm831x-backup",
 982         },
 983         {
 984                 .name = "wm831x-buckv",
 985                 .id = 1,
 986                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
 987                 .resources = wm831x_dcdc1_resources,
 988         },
 989         {
 990                 .name = "wm831x-buckv",
 991                 .id = 2,
 992                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
 993                 .resources = wm831x_dcdc2_resources,
 994         },
 995         {
 996                 .name = "wm831x-buckp",
 997                 .id = 3,
 998                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
 999                 .resources = wm831x_dcdc3_resources,
1000         },
1001         {
1002                 .name = "wm831x-boostp",
1003                 .id = 4,
1004                 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1005                 .resources = wm831x_dcdc4_resources,
1006         },
1007         {
1008                 .name = "wm831x-epe",
1009                 .id = 1,
1010         },
1011         {
1012                 .name = "wm831x-epe",
1013                 .id = 2,
1014         },
1015         {
1016                 .name = "wm831x-gpio",
1017                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1018                 .resources = wm831x_gpio_resources,
1019         },
1020         {
1021                 .name = "wm831x-hwmon",
1022         },
1023         {
1024                 .name = "wm831x-isink",
1025                 .id = 1,
1026                 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1027                 .resources = wm831x_isink1_resources,
1028         },
1029         {
1030                 .name = "wm831x-isink",
1031                 .id = 2,
1032                 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1033                 .resources = wm831x_isink2_resources,
1034         },
1035         {
1036                 .name = "wm831x-ldo",
1037                 .id = 1,
1038                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1039                 .resources = wm831x_ldo1_resources,
1040         },
1041         {
1042                 .name = "wm831x-ldo",
1043                 .id = 2,
1044                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1045                 .resources = wm831x_ldo2_resources,
1046         },
1047         {
1048                 .name = "wm831x-ldo",
1049                 .id = 3,
1050                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1051                 .resources = wm831x_ldo3_resources,
1052         },
1053         {
1054                 .name = "wm831x-ldo",
1055                 .id = 4,
1056                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1057                 .resources = wm831x_ldo4_resources,
1058         },
1059         {
1060                 .name = "wm831x-ldo",
1061                 .id = 5,
1062                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1063                 .resources = wm831x_ldo5_resources,
1064         },
1065         {
1066                 .name = "wm831x-aldo",
1067                 .id = 7,
1068                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1069                 .resources = wm831x_ldo7_resources,
1070         },
1071         {
1072                 .name = "wm831x-alive-ldo",
1073                 .id = 11,
1074                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1075                 .resources = wm831x_ldo11_resources,
1076         },
1077         {
1078                 .name = "wm831x-on",
1079                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1080                 .resources = wm831x_on_resources,
1081         },
1082         {
1083                 .name = "wm831x-power",
1084                 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1085                 .resources = wm831x_power_resources,
1086         },
1087         {
1088                 .name = "wm831x-rtc",
1089                 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1090                 .resources = wm831x_rtc_resources,
1091         },
1092         {
1093                 .name = "wm831x-status",
1094                 .id = 1,
1095                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1096                 .resources = wm831x_status1_resources,
1097         },
1098         {
1099                 .name = "wm831x-status",
1100                 .id = 2,
1101                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1102                 .resources = wm831x_status2_resources,
1103         },
1104         {
1105                 .name = "wm831x-touch",
1106                 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1107                 .resources = wm831x_touch_resources,
1108         },
1109         {
1110                 .name = "wm831x-watchdog",
1111                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1112                 .resources = wm831x_wdt_resources,
1113         },
1114 };
1115
1116 static struct mfd_cell wm8312_devs[] = {
1117         {
1118                 .name = "wm831x-backup",
1119         },
1120         {
1121                 .name = "wm831x-buckv",
1122                 .id = 1,
1123                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1124                 .resources = wm831x_dcdc1_resources,
1125         },
1126         {
1127                 .name = "wm831x-buckv",
1128                 .id = 2,
1129                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1130                 .resources = wm831x_dcdc2_resources,
1131         },
1132         {
1133                 .name = "wm831x-buckp",
1134                 .id = 3,
1135                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1136                 .resources = wm831x_dcdc3_resources,
1137         },
1138         {
1139                 .name = "wm831x-boostp",
1140                 .id = 4,
1141                 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1142                 .resources = wm831x_dcdc4_resources,
1143         },
1144         {
1145                 .name = "wm831x-epe",
1146                 .id = 1,
1147         },
1148         {
1149                 .name = "wm831x-epe",
1150                 .id = 2,
1151         },
1152         {
1153                 .name = "wm831x-gpio",
1154                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1155                 .resources = wm831x_gpio_resources,
1156         },
1157         {
1158                 .name = "wm831x-hwmon",
1159         },
1160         {
1161                 .name = "wm831x-isink",
1162                 .id = 1,
1163                 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1164                 .resources = wm831x_isink1_resources,
1165         },
1166         {
1167                 .name = "wm831x-isink",
1168                 .id = 2,
1169                 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1170                 .resources = wm831x_isink2_resources,
1171         },
1172         {
1173                 .name = "wm831x-ldo",
1174                 .id = 1,
1175                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1176                 .resources = wm831x_ldo1_resources,
1177         },
1178         {
1179                 .name = "wm831x-ldo",
1180                 .id = 2,
1181                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1182                 .resources = wm831x_ldo2_resources,
1183         },
1184         {
1185                 .name = "wm831x-ldo",
1186                 .id = 3,
1187                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1188                 .resources = wm831x_ldo3_resources,
1189         },
1190         {
1191                 .name = "wm831x-ldo",
1192                 .id = 4,
1193                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1194                 .resources = wm831x_ldo4_resources,
1195         },
1196         {
1197                 .name = "wm831x-ldo",
1198                 .id = 5,
1199                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1200                 .resources = wm831x_ldo5_resources,
1201         },
1202         {
1203                 .name = "wm831x-ldo",
1204                 .id = 6,
1205                 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1206                 .resources = wm831x_ldo6_resources,
1207         },
1208         {
1209                 .name = "wm831x-aldo",
1210                 .id = 7,
1211                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1212                 .resources = wm831x_ldo7_resources,
1213         },
1214         {
1215                 .name = "wm831x-aldo",
1216                 .id = 8,
1217                 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1218                 .resources = wm831x_ldo8_resources,
1219         },
1220         {
1221                 .name = "wm831x-aldo",
1222                 .id = 9,
1223                 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1224                 .resources = wm831x_ldo9_resources,
1225         },
1226         {
1227                 .name = "wm831x-aldo",
1228                 .id = 10,
1229                 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1230                 .resources = wm831x_ldo10_resources,
1231         },
1232         {
1233                 .name = "wm831x-alive-ldo",
1234                 .id = 11,
1235                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1236                 .resources = wm831x_ldo11_resources,
1237         },
1238         {
1239                 .name = "wm831x-on",
1240                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1241                 .resources = wm831x_on_resources,
1242         },
1243         {
1244                 .name = "wm831x-power",
1245                 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1246                 .resources = wm831x_power_resources,
1247         },
1248         {
1249                 .name = "wm831x-rtc",
1250                 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1251                 .resources = wm831x_rtc_resources,
1252         },
1253         {
1254                 .name = "wm831x-status",
1255                 .id = 1,
1256                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1257                 .resources = wm831x_status1_resources,
1258         },
1259         {
1260                 .name = "wm831x-status",
1261                 .id = 2,
1262                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1263                 .resources = wm831x_status2_resources,
1264         },
1265         {
1266                 .name = "wm831x-touch",
1267                 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1268                 .resources = wm831x_touch_resources,
1269         },
1270         {
1271                 .name = "wm831x-watchdog",
1272                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1273                 .resources = wm831x_wdt_resources,
1274         },
1275 };
1276
1277 static struct mfd_cell wm8320_devs[] = {
1278         {
1279                 .name = "wm831x-backup",
1280         },
1281         {
1282                 .name = "wm831x-buckv",
1283                 .id = 1,
1284                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1285                 .resources = wm831x_dcdc1_resources,
1286         },
1287         {
1288                 .name = "wm831x-buckv",
1289                 .id = 2,
1290                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1291                 .resources = wm831x_dcdc2_resources,
1292         },
1293         {
1294                 .name = "wm831x-buckp",
1295                 .id = 3,
1296                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1297                 .resources = wm831x_dcdc3_resources,
1298         },
1299         {
1300                 .name = "wm831x-buckp",
1301                 .id = 4,
1302                 .num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
1303                 .resources = wm8320_dcdc4_buck_resources,
1304         },
1305         {
1306                 .name = "wm831x-gpio",
1307                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1308                 .resources = wm831x_gpio_resources,
1309         },
1310         {
1311                 .name = "wm831x-hwmon",
1312         },
1313         {
1314                 .name = "wm831x-ldo",
1315                 .id = 1,
1316                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1317                 .resources = wm831x_ldo1_resources,
1318         },
1319         {
1320                 .name = "wm831x-ldo",
1321                 .id = 2,
1322                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1323                 .resources = wm831x_ldo2_resources,
1324         },
1325         {
1326                 .name = "wm831x-ldo",
1327                 .id = 3,
1328                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1329                 .resources = wm831x_ldo3_resources,
1330         },
1331         {
1332                 .name = "wm831x-ldo",
1333                 .id = 4,
1334                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1335                 .resources = wm831x_ldo4_resources,
1336         },
1337         {
1338                 .name = "wm831x-ldo",
1339                 .id = 5,
1340                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1341                 .resources = wm831x_ldo5_resources,
1342         },
1343         {
1344                 .name = "wm831x-ldo",
1345                 .id = 6,
1346                 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1347                 .resources = wm831x_ldo6_resources,
1348         },
1349         {
1350                 .name = "wm831x-aldo",
1351                 .id = 7,
1352                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1353                 .resources = wm831x_ldo7_resources,
1354         },
1355         {
1356                 .name = "wm831x-aldo",
1357                 .id = 8,
1358                 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1359                 .resources = wm831x_ldo8_resources,
1360         },
1361         {
1362                 .name = "wm831x-aldo",
1363                 .id = 9,
1364                 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1365                 .resources = wm831x_ldo9_resources,
1366         },
1367         {
1368                 .name = "wm831x-aldo",
1369                 .id = 10,
1370                 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1371                 .resources = wm831x_ldo10_resources,
1372         },
1373         {
1374                 .name = "wm831x-alive-ldo",
1375                 .id = 11,
1376                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1377                 .resources = wm831x_ldo11_resources,
1378         },
1379         {
1380                 .name = "wm831x-on",
1381                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1382                 .resources = wm831x_on_resources,
1383         },
1384         {
1385                 .name = "wm831x-rtc",
1386                 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1387                 .resources = wm831x_rtc_resources,
1388         },
1389         {
1390                 .name = "wm831x-status",
1391                 .id = 1,
1392                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1393                 .resources = wm831x_status1_resources,
1394         },
1395         {
1396                 .name = "wm831x-status",
1397                 .id = 2,
1398                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1399                 .resources = wm831x_status2_resources,
1400         },
1401         {
1402                 .name = "wm831x-watchdog",
1403                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1404                 .resources = wm831x_wdt_resources,
1405         },
1406 };
1407
1408 static struct mfd_cell backlight_devs[] = {
1409         {
1410                 .name = "wm831x-backlight",
1411         },
1412 };
1413
1414 /*
1415  * Instantiate the generic non-control parts of the device.
1416  */
1417 static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
1418 {
1419         struct wm831x_pdata *pdata = wm831x->dev->platform_data;
1420         int rev;
1421         enum wm831x_parent parent;
1422         int ret;
1423
1424         mutex_init(&wm831x->io_lock);
1425         mutex_init(&wm831x->key_lock);
1426         mutex_init(&wm831x->auxadc_lock);
1427         init_completion(&wm831x->auxadc_done);
1428         dev_set_drvdata(wm831x->dev, wm831x);
1429
1430         ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1431         if (ret < 0) {
1432                 dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1433                 goto err;
1434         }
1435         if (ret != 0x6204) {
1436                 dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1437                 ret = -EINVAL;
1438                 goto err;
1439         }
1440
1441         ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1442         if (ret < 0) {
1443                 dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1444                 goto err;
1445         }
1446         rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1447
1448         ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1449         if (ret < 0) {
1450                 dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1451                 goto err;
1452         }
1453
1454         /* Some engineering samples do not have the ID set, rely on
1455          * the device being registered correctly.
1456          */
1457         if (ret == 0) {
1458                 dev_info(wm831x->dev, "Device is an engineering sample\n");
1459                 ret = id;
1460         }
1461
1462         switch (ret) {
1463         case WM8310:
1464                 parent = WM8310;
1465                 wm831x->num_gpio = 16;
1466                 if (rev > 0) {
1467                         wm831x->has_gpio_ena = 1;
1468                         wm831x->has_cs_sts = 1;
1469                 }
1470
1471                 dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
1472                 break;
1473
1474         case WM8311:
1475                 parent = WM8311;
1476                 wm831x->num_gpio = 16;
1477                 if (rev > 0) {
1478                         wm831x->has_gpio_ena = 1;
1479                         wm831x->has_cs_sts = 1;
1480                 }
1481
1482                 dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
1483                 break;
1484
1485         case WM8312:
1486                 parent = WM8312;
1487                 wm831x->num_gpio = 16;
1488                 if (rev > 0) {
1489                         wm831x->has_gpio_ena = 1;
1490                         wm831x->has_cs_sts = 1;
1491                 }
1492
1493                 dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
1494                 break;
1495
1496         case WM8320:
1497                 parent = WM8320;
1498                 wm831x->num_gpio = 12;
1499                 dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);
1500                 break;
1501
1502         default:
1503                 dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1504                 ret = -EINVAL;
1505                 goto err;
1506         }
1507
1508         /* This will need revisiting in future but is OK for all
1509          * current parts.
1510          */
1511         if (parent != id)
1512                 dev_warn(wm831x->dev, "Device was registered as a WM%lx\n",
1513                          id);
1514
1515         /* Bootstrap the user key */
1516         ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1517         if (ret < 0) {
1518                 dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1519                 goto err;
1520         }
1521         if (ret != 0) {
1522                 dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1523                          ret);
1524                 wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1525         }
1526         wm831x->locked = 1;
1527
1528         if (pdata && pdata->pre_init) {
1529                 ret = pdata->pre_init(wm831x);
1530                 if (ret != 0) {
1531                         dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1532                         goto err;
1533                 }
1534         }
1535
1536         ret = wm831x_irq_init(wm831x, irq);
1537         if (ret != 0)
1538                 goto err;
1539
1540         if (wm831x->irq_base) {
1541                 ret = request_threaded_irq(wm831x->irq_base +
1542                                            WM831X_IRQ_AUXADC_DATA,
1543                                            NULL, wm831x_auxadc_irq, 0,
1544                                            "auxadc", wm831x);
1545                 if (ret < 0)
1546                         dev_err(wm831x->dev, "AUXADC IRQ request failed: %d\n",
1547                                 ret);
1548         }
1549
1550         /* The core device is up, instantiate the subdevices. */
1551         switch (parent) {
1552         case WM8310:
1553                 ret = mfd_add_devices(wm831x->dev, -1,
1554                                       wm8310_devs, ARRAY_SIZE(wm8310_devs),
1555                                       NULL, wm831x->irq_base);
1556                 break;
1557
1558         case WM8311:
1559                 ret = mfd_add_devices(wm831x->dev, -1,
1560                                       wm8311_devs, ARRAY_SIZE(wm8311_devs),
1561                                       NULL, wm831x->irq_base);
1562                 break;
1563
1564         case WM8312:
1565                 ret = mfd_add_devices(wm831x->dev, -1,
1566                                       wm8312_devs, ARRAY_SIZE(wm8312_devs),
1567                                       NULL, wm831x->irq_base);
1568                 break;
1569
1570         case WM8320:
1571                 ret = mfd_add_devices(wm831x->dev, -1,
1572                                       wm8320_devs, ARRAY_SIZE(wm8320_devs),
1573                                       NULL, 0);
1574                 break;
1575
1576         default:
1577                 /* If this happens the bus probe function is buggy */
1578                 BUG();
1579         }
1580
1581         if (ret != 0) {
1582                 dev_err(wm831x->dev, "Failed to add children\n");
1583                 goto err_irq;
1584         }
1585
1586         if (pdata && pdata->backlight) {
1587                 /* Treat errors as non-critical */
1588                 ret = mfd_add_devices(wm831x->dev, -1, backlight_devs,
1589                                       ARRAY_SIZE(backlight_devs), NULL,
1590                                       wm831x->irq_base);
1591                 if (ret < 0)
1592                         dev_err(wm831x->dev, "Failed to add backlight: %d\n",
1593                                 ret);
1594         }
1595
1596         wm831x_otp_init(wm831x);
1597
1598         if (pdata && pdata->post_init) {
1599                 ret = pdata->post_init(wm831x);
1600                 if (ret != 0) {
1601                         dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1602                         goto err_irq;
1603                 }
1604         }
1605
1606         return 0;
1607
1608 err_irq:
1609         wm831x_irq_exit(wm831x);
1610 err:
1611         mfd_remove_devices(wm831x->dev);
1612         kfree(wm831x);
1613         return ret;
1614 }
1615
1616 static void wm831x_device_exit(struct wm831x *wm831x)
1617 {
1618         wm831x_otp_exit(wm831x);
1619         mfd_remove_devices(wm831x->dev);
1620         if (wm831x->irq_base)
1621                 free_irq(wm831x->irq_base + WM831X_IRQ_AUXADC_DATA, wm831x);
1622         wm831x_irq_exit(wm831x);
1623         kfree(wm831x);
1624 }
1625
1626 static int wm831x_i2c_read_device(struct wm831x *wm831x, unsigned short reg,
1627                                   int bytes, void *dest)
1628 {
1629         struct i2c_client *i2c = wm831x->control_data;
1630         int ret;
1631         u16 r = cpu_to_be16(reg);
1632
1633         ret = i2c_master_send(i2c, (unsigned char *)&r, 2);
1634         if (ret < 0)
1635                 return ret;
1636         if (ret != 2)
1637                 return -EIO;
1638
1639         ret = i2c_master_recv(i2c, dest, bytes);
1640         if (ret < 0)
1641                 return ret;
1642         if (ret != bytes)
1643                 return -EIO;
1644         return 0;
1645 }
1646
1647 /* Currently we allocate the write buffer on the stack; this is OK for
1648  * small writes - if we need to do large writes this will need to be
1649  * revised.
1650  */
1651 static int wm831x_i2c_write_device(struct wm831x *wm831x, unsigned short reg,
1652                                    int bytes, void *src)
1653 {
1654         struct i2c_client *i2c = wm831x->control_data;
1655         unsigned char msg[bytes + 2];
1656         int ret;
1657
1658         reg = cpu_to_be16(reg);
1659         memcpy(&msg[0], &reg, 2);
1660         memcpy(&msg[2], src, bytes);
1661
1662         ret = i2c_master_send(i2c, msg, bytes + 2);
1663         if (ret < 0)
1664                 return ret;
1665         if (ret < bytes + 2)
1666                 return -EIO;
1667
1668         return 0;
1669 }
1670
1671 static int wm831x_i2c_probe(struct i2c_client *i2c,
1672                             const struct i2c_device_id *id)
1673 {
1674         struct wm831x *wm831x;
1675
1676         wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
1677         if (wm831x == NULL) {
1678                 kfree(i2c);
1679                 return -ENOMEM;
1680         }
1681
1682         i2c_set_clientdata(i2c, wm831x);
1683         wm831x->dev = &i2c->dev;
1684         wm831x->control_data = i2c;
1685         wm831x->read_dev = wm831x_i2c_read_device;
1686         wm831x->write_dev = wm831x_i2c_write_device;
1687
1688         return wm831x_device_init(wm831x, id->driver_data, i2c->irq);
1689 }
1690
1691 static int wm831x_i2c_remove(struct i2c_client *i2c)
1692 {
1693         struct wm831x *wm831x = i2c_get_clientdata(i2c);
1694
1695         wm831x_device_exit(wm831x);
1696
1697         return 0;
1698 }
1699
1700 static const struct i2c_device_id wm831x_i2c_id[] = {
1701         { "wm8310", WM8310 },
1702         { "wm8311", WM8311 },
1703         { "wm8312", WM8312 },
1704         { "wm8320", WM8320 },
1705         { }
1706 };
1707 MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
1708
1709
1710 static struct i2c_driver wm831x_i2c_driver = {
1711         .driver = {
1712                    .name = "wm831x",
1713                    .owner = THIS_MODULE,
1714         },
1715         .probe = wm831x_i2c_probe,
1716         .remove = wm831x_i2c_remove,
1717         .id_table = wm831x_i2c_id,
1718 };
1719
1720 static int __init wm831x_i2c_init(void)
1721 {
1722         int ret;
1723
1724         ret = i2c_add_driver(&wm831x_i2c_driver);
1725         if (ret != 0)
1726                 pr_err("Failed to register wm831x I2C driver: %d\n", ret);
1727
1728         return ret;
1729 }
1730 subsys_initcall(wm831x_i2c_init);
1731
1732 static void __exit wm831x_i2c_exit(void)
1733 {
1734         i2c_del_driver(&wm831x_i2c_driver);
1735 }
1736 module_exit(wm831x_i2c_exit);
1737
1738 MODULE_DESCRIPTION("I2C support for the WM831X AudioPlus PMIC");
1739 MODULE_LICENSE("GPL");
1740 MODULE_AUTHOR("Mark Brown");