drivers/mfd/wm8350-core.c

   1 /*
   2  * wm8350-core.c  --  Device access for Wolfson WM8350
   3  *
   4  * Copyright 2007, 2008 Wolfson Microelectronics PLC.
   5  *
   6  * Author: Liam Girdwood, Mark Brown
   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/init.h>
  18 #include <linux/bug.h>
  19 #include <linux/device.h>
  20 #include <linux/delay.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/workqueue.h>
  23
  24 #include <linux/mfd/wm8350/core.h>
  25 #include <linux/mfd/wm8350/audio.h>
  26 #include <linux/mfd/wm8350/comparator.h>
  27 #include <linux/mfd/wm8350/gpio.h>
  28 #include <linux/mfd/wm8350/pmic.h>
  29 #include <linux/mfd/wm8350/rtc.h>
  30 #include <linux/mfd/wm8350/supply.h>
  31 #include <linux/mfd/wm8350/wdt.h>
  32
  33 #define WM8350_UNLOCK_KEY               0x0013
  34 #define WM8350_LOCK_KEY                 0x0000
  35
  36 #define WM8350_CLOCK_CONTROL_1          0x28
  37 #define WM8350_AIF_TEST                 0x74
  38
  39 /* debug */
  40 #define WM8350_BUS_DEBUG 0
  41 #if WM8350_BUS_DEBUG
  42 #define dump(regs, src) do { \
  43         int i_; \
  44         u16 *src_ = src; \
  45         printk(KERN_DEBUG); \
  46         for (i_ = 0; i_ < regs; i_++) \
  47                 printk(" 0x%4.4x", *src_++); \
  48         printk("\n"); \
  49 } while (0);
  50 #else
  51 #define dump(bytes, src)
  52 #endif
  53
  54 #define WM8350_LOCK_DEBUG 0
  55 #if WM8350_LOCK_DEBUG
  56 #define ldbg(format, arg...) printk(format, ## arg)
  57 #else
  58 #define ldbg(format, arg...)
  59 #endif
  60
  61 /*
  62  * WM8350 Device IO
  63  */
  64 static DEFINE_MUTEX(io_mutex);
  65 static DEFINE_MUTEX(reg_lock_mutex);
  66
  67 /* Perform a physical read from the device.
  68  */
  69 static int wm8350_phys_read(struct wm8350 *wm8350, u8 reg, int num_regs,
  70                             u16 *dest)
  71 {
  72         int i, ret;
  73         int bytes = num_regs * 2;
  74
  75         dev_dbg(wm8350->dev, "volatile read\n");
  76         ret = wm8350->read_dev(wm8350, reg, bytes, (char *)dest);
  77
  78         for (i = reg; i < reg + num_regs; i++) {
  79                 /* Cache is CPU endian */
  80                 dest[i - reg] = be16_to_cpu(dest[i - reg]);
  81
  82                 /* Mask out non-readable bits */
  83                 dest[i - reg] &= wm8350_reg_io_map[i].readable;
  84         }
  85
  86         dump(num_regs, dest);
  87
  88         return ret;
  89 }
  90
  91 static int wm8350_read(struct wm8350 *wm8350, u8 reg, int num_regs, u16 *dest)
  92 {
  93         int i;
  94         int end = reg + num_regs;
  95         int ret = 0;
  96         int bytes = num_regs * 2;
  97
  98         if (wm8350->read_dev == NULL)
  99                 return -ENODEV;
 100
 101         if ((reg + num_regs - 1) > WM8350_MAX_REGISTER) {
 102                 dev_err(wm8350->dev, "invalid reg %x\n",
 103                         reg + num_regs - 1);
 104                 return -EINVAL;
 105         }
 106
 107         dev_dbg(wm8350->dev,
 108                 "%s R%d(0x%2.2x) %d regs\n", __func__, reg, reg, num_regs);
 109
 110 #if WM8350_BUS_DEBUG
 111         /* we can _safely_ read any register, but warn if read not supported */
 112         for (i = reg; i < end; i++) {
 113                 if (!wm8350_reg_io_map[i].readable)
 114                         dev_warn(wm8350->dev,
 115                                 "reg R%d is not readable\n", i);
 116         }
 117 #endif
 118
 119         /* if any volatile registers are required, then read back all */
 120         for (i = reg; i < end; i++)
 121                 if (wm8350_reg_io_map[i].vol)
 122                         return wm8350_phys_read(wm8350, reg, num_regs, dest);
 123
 124         /* no volatiles, then cache is good */
 125         dev_dbg(wm8350->dev, "cache read\n");
 126         memcpy(dest, &wm8350->reg_cache[reg], bytes);
 127         dump(num_regs, dest);
 128         return ret;
 129 }
 130
 131 static inline int is_reg_locked(struct wm8350 *wm8350, u8 reg)
 132 {
 133         if (reg == WM8350_SECURITY ||
 134             wm8350->reg_cache[WM8350_SECURITY] == WM8350_UNLOCK_KEY)
 135                 return 0;
 136
 137         if ((reg >= WM8350_GPIO_FUNCTION_SELECT_1 &&
 138              reg <= WM8350_GPIO_FUNCTION_SELECT_4) ||
 139             (reg >= WM8350_BATTERY_CHARGER_CONTROL_1 &&
 140              reg <= WM8350_BATTERY_CHARGER_CONTROL_3))
 141                 return 1;
 142         return 0;
 143 }
 144
 145 static int wm8350_write(struct wm8350 *wm8350, u8 reg, int num_regs, u16 *src)
 146 {
 147         int i;
 148         int end = reg + num_regs;
 149         int bytes = num_regs * 2;
 150
 151         if (wm8350->write_dev == NULL)
 152                 return -ENODEV;
 153
 154         if ((reg + num_regs - 1) > WM8350_MAX_REGISTER) {
 155                 dev_err(wm8350->dev, "invalid reg %x\n",
 156                         reg + num_regs - 1);
 157                 return -EINVAL;
 158         }
 159
 160         /* it's generally not a good idea to write to RO or locked registers */
 161         for (i = reg; i < end; i++) {
 162                 if (!wm8350_reg_io_map[i].writable) {
 163                         dev_err(wm8350->dev,
 164                                 "attempted write to read only reg R%d\n", i);
 165                         return -EINVAL;
 166                 }
 167
 168                 if (is_reg_locked(wm8350, i)) {
 169                         dev_err(wm8350->dev,
 170                                "attempted write to locked reg R%d\n", i);
 171                         return -EINVAL;
 172                 }
 173
 174                 src[i - reg] &= wm8350_reg_io_map[i].writable;
 175
 176                 wm8350->reg_cache[i] =
 177                         (wm8350->reg_cache[i] & ~wm8350_reg_io_map[i].writable)
 178                         | src[i - reg];
 179
 180                 src[i - reg] = cpu_to_be16(src[i - reg]);
 181         }
 182
 183         /* Actually write it out */
 184         return wm8350->write_dev(wm8350, reg, bytes, (char *)src);
 185 }
 186
 187 /*
 188  * Safe read, modify, write methods
 189  */
 190 int wm8350_clear_bits(struct wm8350 *wm8350, u16 reg, u16 mask)
 191 {
 192         u16 data;
 193         int err;
 194
 195         mutex_lock(&io_mutex);
 196         err = wm8350_read(wm8350, reg, 1, &data);
 197         if (err) {
 198                 dev_err(wm8350->dev, "read from reg R%d failed\n", reg);
 199                 goto out;
 200         }
 201
 202         data &= ~mask;
 203         err = wm8350_write(wm8350, reg, 1, &data);
 204         if (err)
 205                 dev_err(wm8350->dev, "write to reg R%d failed\n", reg);
 206 out:
 207         mutex_unlock(&io_mutex);
 208         return err;
 209 }
 210 EXPORT_SYMBOL_GPL(wm8350_clear_bits);
 211
 212 int wm8350_set_bits(struct wm8350 *wm8350, u16 reg, u16 mask)
 213 {
 214         u16 data;
 215         int err;
 216
 217         mutex_lock(&io_mutex);
 218         err = wm8350_read(wm8350, reg, 1, &data);
 219         if (err) {
 220                 dev_err(wm8350->dev, "read from reg R%d failed\n", reg);
 221                 goto out;
 222         }
 223
 224         data |= mask;
 225         err = wm8350_write(wm8350, reg, 1, &data);
 226         if (err)
 227                 dev_err(wm8350->dev, "write to reg R%d failed\n", reg);
 228 out:
 229         mutex_unlock(&io_mutex);
 230         return err;
 231 }
 232 EXPORT_SYMBOL_GPL(wm8350_set_bits);
 233
 234 u16 wm8350_reg_read(struct wm8350 *wm8350, int reg)
 235 {
 236         u16 data;
 237         int err;
 238
 239         mutex_lock(&io_mutex);
 240         err = wm8350_read(wm8350, reg, 1, &data);
 241         if (err)
 242                 dev_err(wm8350->dev, "read from reg R%d failed\n", reg);
 243
 244         mutex_unlock(&io_mutex);
 245         return data;
 246 }
 247 EXPORT_SYMBOL_GPL(wm8350_reg_read);
 248
 249 int wm8350_reg_write(struct wm8350 *wm8350, int reg, u16 val)
 250 {
 251         int ret;
 252         u16 data = val;
 253
 254         mutex_lock(&io_mutex);
 255         ret = wm8350_write(wm8350, reg, 1, &data);
 256         if (ret)
 257                 dev_err(wm8350->dev, "write to reg R%d failed\n", reg);
 258         mutex_unlock(&io_mutex);
 259         return ret;
 260 }
 261 EXPORT_SYMBOL_GPL(wm8350_reg_write);
 262
 263 int wm8350_block_read(struct wm8350 *wm8350, int start_reg, int regs,
 264                       u16 *dest)
 265 {
 266         int err = 0;
 267
 268         mutex_lock(&io_mutex);
 269         err = wm8350_read(wm8350, start_reg, regs, dest);
 270         if (err)
 271                 dev_err(wm8350->dev, "block read starting from R%d failed\n",
 272                         start_reg);
 273         mutex_unlock(&io_mutex);
 274         return err;
 275 }
 276 EXPORT_SYMBOL_GPL(wm8350_block_read);
 277
 278 int wm8350_block_write(struct wm8350 *wm8350, int start_reg, int regs,
 279                        u16 *src)
 280 {
 281         int ret = 0;
 282
 283         mutex_lock(&io_mutex);
 284         ret = wm8350_write(wm8350, start_reg, regs, src);
 285         if (ret)
 286                 dev_err(wm8350->dev, "block write starting at R%d failed\n",
 287                         start_reg);
 288         mutex_unlock(&io_mutex);
 289         return ret;
 290 }
 291 EXPORT_SYMBOL_GPL(wm8350_block_write);
 292
 293 /**
 294  * wm8350_reg_lock()
 295  *
 296  * The WM8350 has a hardware lock which can be used to prevent writes to
 297  * some registers (generally those which can cause particularly serious
 298  * problems if misused).  This function enables that lock.
 299  */
 300 int wm8350_reg_lock(struct wm8350 *wm8350)
 301 {
 302         u16 key = WM8350_LOCK_KEY;
 303         int ret;
 304
 305         ldbg(__func__);
 306         mutex_lock(&io_mutex);
 307         ret = wm8350_write(wm8350, WM8350_SECURITY, 1, &key);
 308         if (ret)
 309                 dev_err(wm8350->dev, "lock failed\n");
 310         mutex_unlock(&io_mutex);
 311         return ret;
 312 }
 313 EXPORT_SYMBOL_GPL(wm8350_reg_lock);
 314
 315 /**
 316  * wm8350_reg_unlock()
 317  *
 318  * The WM8350 has a hardware lock which can be used to prevent writes to
 319  * some registers (generally those which can cause particularly serious
 320  * problems if misused).  This function disables that lock so updates
 321  * can be performed.  For maximum safety this should be done only when
 322  * required.
 323  */
 324 int wm8350_reg_unlock(struct wm8350 *wm8350)
 325 {
 326         u16 key = WM8350_UNLOCK_KEY;
 327         int ret;
 328
 329         ldbg(__func__);
 330         mutex_lock(&io_mutex);
 331         ret = wm8350_write(wm8350, WM8350_SECURITY, 1, &key);
 332         if (ret)
 333                 dev_err(wm8350->dev, "unlock failed\n");
 334         mutex_unlock(&io_mutex);
 335         return ret;
 336 }
 337 EXPORT_SYMBOL_GPL(wm8350_reg_unlock);
 338
 339 int wm8350_read_auxadc(struct wm8350 *wm8350, int channel, int scale, int vref)
 340 {
 341         u16 reg, result = 0;
 342         int tries = 5;
 343
 344         if (channel < WM8350_AUXADC_AUX1 || channel > WM8350_AUXADC_TEMP)
 345                 return -EINVAL;
 346         if (channel >= WM8350_AUXADC_USB && channel <= WM8350_AUXADC_TEMP
 347             && (scale != 0 || vref != 0))
 348                 return -EINVAL;
 349
 350         mutex_lock(&wm8350->auxadc_mutex);
 351
 352         /* Turn on the ADC */
 353         reg = wm8350_reg_read(wm8350, WM8350_POWER_MGMT_5);
 354         wm8350_reg_write(wm8350, WM8350_POWER_MGMT_5, reg | WM8350_AUXADC_ENA);
 355
 356         if (scale || vref) {
 357                 reg = scale << 13;
 358                 reg |= vref << 12;
 359                 wm8350_reg_write(wm8350, WM8350_AUX1_READBACK + channel, reg);
 360         }
 361
 362         reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1);
 363         reg |= 1 << channel | WM8350_AUXADC_POLL;
 364         wm8350_reg_write(wm8350, WM8350_DIGITISER_CONTROL_1, reg);
 365
 366         do {
 367                 schedule_timeout_interruptible(1);
 368                 reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1);
 369         } while ((reg & WM8350_AUXADC_POLL) && --tries);
 370
 371         if (!tries)
 372                 dev_err(wm8350->dev, "adc chn %d read timeout\n", channel);
 373         else
 374                 result = wm8350_reg_read(wm8350,
 375                                          WM8350_AUX1_READBACK + channel);
 376
 377         /* Turn off the ADC */
 378         reg = wm8350_reg_read(wm8350, WM8350_POWER_MGMT_5);
 379         wm8350_reg_write(wm8350, WM8350_POWER_MGMT_5,
 380                          reg & ~WM8350_AUXADC_ENA);
 381
 382         mutex_unlock(&wm8350->auxadc_mutex);
 383
 384         return result & WM8350_AUXADC_DATA1_MASK;
 385 }
 386 EXPORT_SYMBOL_GPL(wm8350_read_auxadc);
 387
 388 /*
 389  * Cache is always host endian.
 390  */
 391 static int wm8350_create_cache(struct wm8350 *wm8350, int type, int mode)
 392 {
 393         int i, ret = 0;
 394         u16 value;
 395         const u16 *reg_map;
 396
 397         switch (type) {
 398         case 0:
 399                 switch (mode) {
 400 #ifdef CONFIG_MFD_WM8350_CONFIG_MODE_0
 401                 case 0:
 402                         reg_map = wm8350_mode0_defaults;
 403                         break;
 404 #endif
 405 #ifdef CONFIG_MFD_WM8350_CONFIG_MODE_1
 406                 case 1:
 407                         reg_map = wm8350_mode1_defaults;
 408                         break;
 409 #endif
 410 #ifdef CONFIG_MFD_WM8350_CONFIG_MODE_2
 411                 case 2:
 412                         reg_map = wm8350_mode2_defaults;
 413                         break;
 414 #endif
 415 #ifdef CONFIG_MFD_WM8350_CONFIG_MODE_3
 416                 case 3:
 417                         reg_map = wm8350_mode3_defaults;
 418                         break;
 419 #endif
 420                 default:
 421                         dev_err(wm8350->dev,
 422                                 "WM8350 configuration mode %d not supported\n",
 423                                 mode);
 424                         return -EINVAL;
 425                 }
 426                 break;
 427
 428         case 1:
 429                 switch (mode) {
 430 #ifdef CONFIG_MFD_WM8351_CONFIG_MODE_0
 431                 case 0:
 432                         reg_map = wm8351_mode0_defaults;
 433                         break;
 434 #endif
 435 #ifdef CONFIG_MFD_WM8351_CONFIG_MODE_1
 436                 case 1:
 437                         reg_map = wm8351_mode1_defaults;
 438                         break;
 439 #endif
 440 #ifdef CONFIG_MFD_WM8351_CONFIG_MODE_2
 441                 case 2:
 442                         reg_map = wm8351_mode2_defaults;
 443                         break;
 444 #endif
 445 #ifdef CONFIG_MFD_WM8351_CONFIG_MODE_3
 446                 case 3:
 447                         reg_map = wm8351_mode3_defaults;
 448                         break;
 449 #endif
 450                 default:
 451                         dev_err(wm8350->dev,
 452                                 "WM8351 configuration mode %d not supported\n",
 453                                 mode);
 454                         return -EINVAL;
 455                 }
 456                 break;
 457
 458         case 2:
 459                 switch (mode) {
 460 #ifdef CONFIG_MFD_WM8352_CONFIG_MODE_0
 461                 case 0:
 462                         reg_map = wm8352_mode0_defaults;
 463                         break;
 464 #endif
 465 #ifdef CONFIG_MFD_WM8352_CONFIG_MODE_1
 466                 case 1:
 467                         reg_map = wm8352_mode1_defaults;
 468                         break;
 469 #endif
 470 #ifdef CONFIG_MFD_WM8352_CONFIG_MODE_2
 471                 case 2:
 472                         reg_map = wm8352_mode2_defaults;
 473                         break;
 474 #endif
 475 #ifdef CONFIG_MFD_WM8352_CONFIG_MODE_3
 476                 case 3:
 477                         reg_map = wm8352_mode3_defaults;
 478                         break;
 479 #endif
 480                 default:
 481                         dev_err(wm8350->dev,
 482                                 "WM8352 configuration mode %d not supported\n",
 483                                 mode);
 484                         return -EINVAL;
 485                 }
 486                 break;
 487
 488         default:
 489                 dev_err(wm8350->dev,
 490                         "WM835x configuration mode %d not supported\n",
 491                         mode);
 492                 return -EINVAL;
 493         }
 494
 495         wm8350->reg_cache =
 496                 kmalloc(sizeof(u16) * (WM8350_MAX_REGISTER + 1), GFP_KERNEL);
 497         if (wm8350->reg_cache == NULL)
 498                 return -ENOMEM;
 499
 500         /* Read the initial cache state back from the device - this is
 501          * a PMIC so the device many not be in a virgin state and we
 502          * can't rely on the silicon values.
 503          */
 504         ret = wm8350->read_dev(wm8350, 0,
 505                                sizeof(u16) * (WM8350_MAX_REGISTER + 1),
 506                                wm8350->reg_cache);
 507         if (ret < 0) {
 508                 dev_err(wm8350->dev,
 509                         "failed to read initial cache values\n");
 510                 goto out;
 511         }
 512
 513         /* Mask out uncacheable/unreadable bits and the audio. */
 514         for (i = 0; i < WM8350_MAX_REGISTER; i++) {
 515                 if (wm8350_reg_io_map[i].readable &&
 516                     (i < WM8350_CLOCK_CONTROL_1 || i > WM8350_AIF_TEST)) {
 517                         value = be16_to_cpu(wm8350->reg_cache[i]);
 518                         value &= wm8350_reg_io_map[i].readable;
 519                         wm8350->reg_cache[i] = value;
 520                 } else
 521                         wm8350->reg_cache[i] = reg_map[i];
 522         }
 523
 524 out:
 525         return ret;
 526 }
 527
 528 /*
 529  * Register a client device.  This is non-fatal since there is no need to
 530  * fail the entire device init due to a single platform device failing.
 531  */
 532 static void wm8350_client_dev_register(struct wm8350 *wm8350,
 533                                        const char *name,
 534                                        struct platform_device **pdev)
 535 {
 536         int ret;
 537
 538         *pdev = platform_device_alloc(name, -1);
 539         if (*pdev == NULL) {
 540                 dev_err(wm8350->dev, "Failed to allocate %s\n", name);
 541                 return;
 542         }
 543
 544         (*pdev)->dev.parent = wm8350->dev;
 545         platform_set_drvdata(*pdev, wm8350);
 546         ret = platform_device_add(*pdev);
 547         if (ret != 0) {
 548                 dev_err(wm8350->dev, "Failed to register %s: %d\n", name, ret);
 549                 platform_device_put(*pdev);
 550                 *pdev = NULL;
 551         }
 552 }
 553
 554 int wm8350_device_init(struct wm8350 *wm8350, int irq,
 555                        struct wm8350_platform_data *pdata)
 556 {
 557         int ret;
 558         u16 id1, id2, mask_rev;
 559         u16 cust_id, mode, chip_rev;
 560
 561         /* get WM8350 revision and config mode */
 562         ret = wm8350->read_dev(wm8350, WM8350_RESET_ID, sizeof(id1), &id1);
 563         if (ret != 0) {
 564                 dev_err(wm8350->dev, "Failed to read ID: %d\n", ret);
 565                 goto err;
 566         }
 567
 568         ret = wm8350->read_dev(wm8350, WM8350_ID, sizeof(id2), &id2);
 569         if (ret != 0) {
 570                 dev_err(wm8350->dev, "Failed to read ID: %d\n", ret);
 571                 goto err;
 572         }
 573
 574         ret = wm8350->read_dev(wm8350, WM8350_REVISION, sizeof(mask_rev),
 575                                &mask_rev);
 576         if (ret != 0) {
 577                 dev_err(wm8350->dev, "Failed to read revision: %d\n", ret);
 578                 goto err;
 579         }
 580
 581         id1 = be16_to_cpu(id1);
 582         id2 = be16_to_cpu(id2);
 583         mask_rev = be16_to_cpu(mask_rev);
 584
 585         if (id1 != 0x6143) {
 586                 dev_err(wm8350->dev,
 587                         "Device with ID %x is not a WM8350\n", id1);
 588                 ret = -ENODEV;
 589                 goto err;
 590         }
 591
 592         mode = id2 & WM8350_CONF_STS_MASK >> 10;
 593         cust_id = id2 & WM8350_CUST_ID_MASK;
 594         chip_rev = (id2 & WM8350_CHIP_REV_MASK) >> 12;
 595         dev_info(wm8350->dev,
 596                  "CONF_STS %d, CUST_ID %d, MASK_REV %d, CHIP_REV %d\n",
 597                  mode, cust_id, mask_rev, chip_rev);
 598
 599         if (cust_id != 0) {
 600                 dev_err(wm8350->dev, "Unsupported CUST_ID\n");
 601                 ret = -ENODEV;
 602                 goto err;
 603         }
 604
 605         switch (mask_rev) {
 606         case 0:
 607                 wm8350->pmic.max_dcdc = WM8350_DCDC_6;
 608                 wm8350->pmic.max_isink = WM8350_ISINK_B;
 609
 610                 switch (chip_rev) {
 611                 case WM8350_REV_E:
 612                         dev_info(wm8350->dev, "WM8350 Rev E\n");
 613                         break;
 614                 case WM8350_REV_F:
 615                         dev_info(wm8350->dev, "WM8350 Rev F\n");
 616                         break;
 617                 case WM8350_REV_G:
 618                         dev_info(wm8350->dev, "WM8350 Rev G\n");
 619                         wm8350->power.rev_g_coeff = 1;
 620                         break;
 621                 case WM8350_REV_H:
 622                         dev_info(wm8350->dev, "WM8350 Rev H\n");
 623                         wm8350->power.rev_g_coeff = 1;
 624                         break;
 625                 default:
 626                         /* For safety we refuse to run on unknown hardware */
 627                         dev_err(wm8350->dev, "Unknown WM8350 CHIP_REV\n");
 628                         ret = -ENODEV;
 629                         goto err;
 630                 }
 631                 break;
 632
 633         case 1:
 634                 wm8350->pmic.max_dcdc = WM8350_DCDC_4;
 635                 wm8350->pmic.max_isink = WM8350_ISINK_A;
 636
 637                 switch (chip_rev) {
 638                 case 0:
 639                         dev_info(wm8350->dev, "WM8351 Rev A\n");
 640                         wm8350->power.rev_g_coeff = 1;
 641                         break;
 642
 643                 case 1:
 644                         dev_info(wm8350->dev, "WM8351 Rev B\n");
 645                         wm8350->power.rev_g_coeff = 1;
 646                         break;
 647
 648                 default:
 649                         dev_err(wm8350->dev, "Unknown WM8351 CHIP_REV\n");
 650                         ret = -ENODEV;
 651                         goto err;
 652                 }
 653                 break;
 654
 655         case 2:
 656                 wm8350->pmic.max_dcdc = WM8350_DCDC_6;
 657                 wm8350->pmic.max_isink = WM8350_ISINK_B;
 658
 659                 switch (chip_rev) {
 660                 case 0:
 661                         dev_info(wm8350->dev, "WM8352 Rev A\n");
 662                         wm8350->power.rev_g_coeff = 1;
 663                         break;
 664
 665                 default:
 666                         dev_err(wm8350->dev, "Unknown WM8352 CHIP_REV\n");
 667                         ret = -ENODEV;
 668                         goto err;
 669                 }
 670                 break;
 671
 672         default:
 673                 dev_err(wm8350->dev, "Unknown MASK_REV\n");
 674                 ret = -ENODEV;
 675                 goto err;
 676         }
 677
 678         ret = wm8350_create_cache(wm8350, mask_rev, mode);
 679         if (ret < 0) {
 680                 dev_err(wm8350->dev, "Failed to create register cache\n");
 681                 return ret;
 682         }
 683
 684         mutex_init(&wm8350->auxadc_mutex);
 685
 686         ret = wm8350_irq_init(wm8350, irq, pdata);
 687         if (ret < 0)
 688                 goto err;
 689
 690         if (pdata && pdata->init) {
 691                 ret = pdata->init(wm8350);
 692                 if (ret != 0) {
 693                         dev_err(wm8350->dev, "Platform init() failed: %d\n",
 694                                 ret);
 695                         goto err_irq;
 696                 }
 697         }
 698
 699         wm8350_reg_write(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK, 0x0);
 700
 701         wm8350_client_dev_register(wm8350, "wm8350-codec",
 702                                    &(wm8350->codec.pdev));
 703         wm8350_client_dev_register(wm8350, "wm8350-gpio",
 704                                    &(wm8350->gpio.pdev));
 705         wm8350_client_dev_register(wm8350, "wm8350-hwmon",
 706                                    &(wm8350->hwmon.pdev));
 707         wm8350_client_dev_register(wm8350, "wm8350-power",
 708                                    &(wm8350->power.pdev));
 709         wm8350_client_dev_register(wm8350, "wm8350-rtc", &(wm8350->rtc.pdev));
 710         wm8350_client_dev_register(wm8350, "wm8350-wdt", &(wm8350->wdt.pdev));
 711
 712         return 0;
 713
 714 err_irq:
 715         wm8350_irq_exit(wm8350);
 716 err:
 717         kfree(wm8350->reg_cache);
 718         return ret;
 719 }
 720 EXPORT_SYMBOL_GPL(wm8350_device_init);
 721
 722 void wm8350_device_exit(struct wm8350 *wm8350)
 723 {
 724         int i;
 725
 726         for (i = 0; i < ARRAY_SIZE(wm8350->pmic.led); i++)
 727                 platform_device_unregister(wm8350->pmic.led[i].pdev);
 728
 729         for (i = 0; i < ARRAY_SIZE(wm8350->pmic.pdev); i++)
 730                 platform_device_unregister(wm8350->pmic.pdev[i]);
 731
 732         platform_device_unregister(wm8350->wdt.pdev);
 733         platform_device_unregister(wm8350->rtc.pdev);
 734         platform_device_unregister(wm8350->power.pdev);
 735         platform_device_unregister(wm8350->hwmon.pdev);
 736         platform_device_unregister(wm8350->gpio.pdev);
 737         platform_device_unregister(wm8350->codec.pdev);
 738
 739         wm8350_irq_exit(wm8350);
 740
 741         kfree(wm8350->reg_cache);
 742 }
 743 EXPORT_SYMBOL_GPL(wm8350_device_exit);
 744
 745 MODULE_DESCRIPTION("WM8350 AudioPlus PMIC core driver");
 746 MODULE_LICENSE("GPL");