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