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/slab.h>
  19 #include <linux/bug.h>
  20 #include <linux/device.h>
  21 #include <linux/delay.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/regmap.h>
  24 #include <linux/workqueue.h>
  25
  26 #include <linux/mfd/wm8350/core.h>
  27 #include <linux/mfd/wm8350/audio.h>
  28 #include <linux/mfd/wm8350/comparator.h>
  29 #include <linux/mfd/wm8350/gpio.h>
  30 #include <linux/mfd/wm8350/pmic.h>
  31 #include <linux/mfd/wm8350/rtc.h>
  32 #include <linux/mfd/wm8350/supply.h>
  33 #include <linux/mfd/wm8350/wdt.h>
  34
  35 #define WM8350_UNLOCK_KEY               0x0013
  36 #define WM8350_LOCK_KEY                 0x0000
  37
  38 #define WM8350_CLOCK_CONTROL_1          0x28
  39 #define WM8350_AIF_TEST                 0x74
  40
  41 /* debug */
  42 #define WM8350_BUS_DEBUG 0
  43 #if WM8350_BUS_DEBUG
  44 #define dump(regs, src) do { \
  45         int i_; \
  46         u16 *src_ = src; \
  47         printk(KERN_DEBUG); \
  48         for (i_ = 0; i_ < regs; i_++) \
  49                 printk(" 0x%4.4x", *src_++); \
  50         printk("\n"); \
  51 } while (0);
  52 #else
  53 #define dump(bytes, src)
  54 #endif
  55
  56 #define WM8350_LOCK_DEBUG 0
  57 #if WM8350_LOCK_DEBUG
  58 #define ldbg(format, arg...) printk(format, ## arg)
  59 #else
  60 #define ldbg(format, arg...)
  61 #endif
  62
  63 /*
  64  * WM8350 Device IO
  65  */
  66 static DEFINE_MUTEX(io_mutex);
  67 static DEFINE_MUTEX(reg_lock_mutex);
  68
  69 /* Perform a physical read from the device.
  70  */
  71 static int wm8350_phys_read(struct wm8350 *wm8350, u8 reg, int num_regs,
  72                             u16 *dest)
  73 {
  74         int i, ret;
  75         int bytes = num_regs * 2;
  76
  77         dev_dbg(wm8350->dev, "volatile read\n");
  78         ret = regmap_raw_read(wm8350->regmap, reg, dest, bytes);
  79
  80         for (i = reg; i < reg + num_regs; i++) {
  81                 /* Cache is CPU endian */
  82                 dest[i - reg] = be16_to_cpu(dest[i - reg]);
  83
  84                 /* Mask out non-readable bits */
  85                 dest[i - reg] &= wm8350_reg_io_map[i].readable;
  86         }
  87
  88         dump(num_regs, dest);
  89
  90         return ret;
  91 }
  92
  93 static int wm8350_read(struct wm8350 *wm8350, u8 reg, int num_regs, u16 *dest)
  94 {
  95         int i;
  96         int end = reg + num_regs;
  97         int ret = 0;
  98         int bytes = num_regs * 2;
  99
 100         if ((reg + num_regs - 1) > WM8350_MAX_REGISTER) {
 101                 dev_err(wm8350->dev, "invalid reg %x\n",
 102                         reg + num_regs - 1);
 103                 return -EINVAL;
 104         }
 105
 106         dev_dbg(wm8350->dev,
 107                 "%s R%d(0x%2.2x) %d regs\n", __func__, reg, reg, num_regs);
 108
 109 #if WM8350_BUS_DEBUG
 110         /* we can _safely_ read any register, but warn if read not supported */
 111         for (i = reg; i < end; i++) {
 112                 if (!wm8350_reg_io_map[i].readable)
 113                         dev_warn(wm8350->dev,
 114                                 "reg R%d is not readable\n", i);
 115         }
 116 #endif
 117
 118         /* if any volatile registers are required, then read back all */
 119         for (i = reg; i < end; i++)
 120                 if (wm8350_reg_io_map[i].vol)
 121                         return wm8350_phys_read(wm8350, reg, num_regs, dest);
 122
 123         /* no volatiles, then cache is good */
 124         dev_dbg(wm8350->dev, "cache read\n");
 125         memcpy(dest, &wm8350->reg_cache[reg], bytes);
 126         dump(num_regs, dest);
 127         return ret;
 128 }
 129
 130 static inline int is_reg_locked(struct wm8350 *wm8350, u8 reg)
 131 {
 132         if (reg == WM8350_SECURITY ||
 133             wm8350->reg_cache[WM8350_SECURITY] == WM8350_UNLOCK_KEY)
 134                 return 0;
 135
 136         if ((reg >= WM8350_GPIO_FUNCTION_SELECT_1 &&
 137              reg <= WM8350_GPIO_FUNCTION_SELECT_4) ||
 138             (reg >= WM8350_BATTERY_CHARGER_CONTROL_1 &&
 139              reg <= WM8350_BATTERY_CHARGER_CONTROL_3))
 140                 return 1;
 141         return 0;
 142 }
 143
 144 static int wm8350_write(struct wm8350 *wm8350, u8 reg, int num_regs, u16 *src)
 145 {
 146         int i;
 147         int end = reg + num_regs;
 148         int bytes = num_regs * 2;
 149
 150         if ((reg + num_regs - 1) > WM8350_MAX_REGISTER) {
 151                 dev_err(wm8350->dev, "invalid reg %x\n",
 152                         reg + num_regs - 1);
 153                 return -EINVAL;
 154         }
 155
 156         /* it's generally not a good idea to write to RO or locked registers */
 157         for (i = reg; i < end; i++) {
 158                 if (!wm8350_reg_io_map[i].writable) {
 159                         dev_err(wm8350->dev,
 160                                 "attempted write to read only reg R%d\n", i);
 161                         return -EINVAL;
 162                 }
 163
 164                 if (is_reg_locked(wm8350, i)) {
 165                         dev_err(wm8350->dev,
 166                                "attempted write to locked reg R%d\n", i);
 167                         return -EINVAL;
 168                 }
 169
 170                 src[i - reg] &= wm8350_reg_io_map[i].writable;
 171
 172                 wm8350->reg_cache[i] =
 173                         (wm8350->reg_cache[i] & ~wm8350_reg_io_map[i].writable)
 174                         | src[i - reg];
 175
 176                 src[i - reg] = cpu_to_be16(src[i - reg]);
 177         }
 178
 179         /* Actually write it out */
 180         return regmap_raw_write(wm8350->regmap, reg, src, bytes);
 181 }
 182
 183 /*
 184  * Safe read, modify, write methods
 185  */
 186 int wm8350_clear_bits(struct wm8350 *wm8350, u16 reg, u16 mask)
 187 {
 188         u16 data;
 189         int err;
 190
 191         mutex_lock(&io_mutex);
 192         err = wm8350_read(wm8350, reg, 1, &data);
 193         if (err) {
 194                 dev_err(wm8350->dev, "read from reg R%d failed\n", reg);
 195                 goto out;
 196         }
 197
 198         data &= ~mask;
 199         err = wm8350_write(wm8350, reg, 1, &data);
 200         if (err)
 201                 dev_err(wm8350->dev, "write to reg R%d failed\n", reg);
 202 out:
 203         mutex_unlock(&io_mutex);
 204         return err;
 205 }
 206 EXPORT_SYMBOL_GPL(wm8350_clear_bits);
 207
 208 int wm8350_set_bits(struct wm8350 *wm8350, u16 reg, u16 mask)
 209 {
 210         u16 data;
 211         int err;
 212
 213         mutex_lock(&io_mutex);
 214         err = wm8350_read(wm8350, reg, 1, &data);
 215         if (err) {
 216                 dev_err(wm8350->dev, "read from reg R%d failed\n", reg);
 217                 goto out;
 218         }
 219
 220         data |= mask;
 221         err = wm8350_write(wm8350, reg, 1, &data);
 222         if (err)
 223                 dev_err(wm8350->dev, "write to reg R%d failed\n", reg);
 224 out:
 225         mutex_unlock(&io_mutex);
 226         return err;
 227 }
 228 EXPORT_SYMBOL_GPL(wm8350_set_bits);
 229
 230 u16 wm8350_reg_read(struct wm8350 *wm8350, int reg)
 231 {
 232         u16 data;
 233         int err;
 234
 235         mutex_lock(&io_mutex);
 236         err = wm8350_read(wm8350, reg, 1, &data);
 237         if (err)
 238                 dev_err(wm8350->dev, "read from reg R%d failed\n", reg);
 239
 240         mutex_unlock(&io_mutex);
 241         return data;
 242 }
 243 EXPORT_SYMBOL_GPL(wm8350_reg_read);
 244
 245 int wm8350_reg_write(struct wm8350 *wm8350, int reg, u16 val)
 246 {
 247         int ret;
 248         u16 data = val;
 249
 250         mutex_lock(&io_mutex);
 251         ret = wm8350_write(wm8350, reg, 1, &data);
 252         if (ret)
 253                 dev_err(wm8350->dev, "write to reg R%d failed\n", reg);
 254         mutex_unlock(&io_mutex);
 255         return ret;
 256 }
 257 EXPORT_SYMBOL_GPL(wm8350_reg_write);
 258
 259 int wm8350_block_read(struct wm8350 *wm8350, int start_reg, int regs,
 260                       u16 *dest)
 261 {
 262         int err = 0;
 263
 264         mutex_lock(&io_mutex);
 265         err = wm8350_read(wm8350, start_reg, regs, dest);
 266         if (err)
 267                 dev_err(wm8350->dev, "block read starting from R%d failed\n",
 268                         start_reg);
 269         mutex_unlock(&io_mutex);
 270         return err;
 271 }
 272 EXPORT_SYMBOL_GPL(wm8350_block_read);
 273
 274 int wm8350_block_write(struct wm8350 *wm8350, int start_reg, int regs,
 275                        u16 *src)
 276 {
 277         int ret = 0;
 278
 279         mutex_lock(&io_mutex);
 280         ret = wm8350_write(wm8350, start_reg, regs, src);
 281         if (ret)
 282                 dev_err(wm8350->dev, "block write starting at R%d failed\n",
 283                         start_reg);
 284         mutex_unlock(&io_mutex);
 285         return ret;
 286 }
 287 EXPORT_SYMBOL_GPL(wm8350_block_write);
 288
 289 /**
 290  * wm8350_reg_lock()
 291  *
 292  * The WM8350 has a hardware lock which can be used to prevent writes to
 293  * some registers (generally those which can cause particularly serious
 294  * problems if misused).  This function enables that lock.
 295  */
 296 int wm8350_reg_lock(struct wm8350 *wm8350)
 297 {
 298         u16 key = WM8350_LOCK_KEY;
 299         int ret;
 300
 301         ldbg(__func__);
 302         mutex_lock(&io_mutex);
 303         ret = wm8350_write(wm8350, WM8350_SECURITY, 1, &key);
 304         if (ret)
 305                 dev_err(wm8350->dev, "lock failed\n");
 306         mutex_unlock(&io_mutex);
 307         return ret;
 308 }
 309 EXPORT_SYMBOL_GPL(wm8350_reg_lock);
 310
 311 /**
 312  * wm8350_reg_unlock()
 313  *
 314  * The WM8350 has a hardware lock which can be used to prevent writes to
 315  * some registers (generally those which can cause particularly serious
 316  * problems if misused).  This function disables that lock so updates
 317  * can be performed.  For maximum safety this should be done only when
 318  * required.
 319  */
 320 int wm8350_reg_unlock(struct wm8350 *wm8350)
 321 {
 322         u16 key = WM8350_UNLOCK_KEY;
 323         int ret;
 324
 325         ldbg(__func__);
 326         mutex_lock(&io_mutex);
 327         ret = wm8350_write(wm8350, WM8350_SECURITY, 1, &key);
 328         if (ret)
 329                 dev_err(wm8350->dev, "unlock failed\n");
 330         mutex_unlock(&io_mutex);
 331         return ret;
 332 }
 333 EXPORT_SYMBOL_GPL(wm8350_reg_unlock);
 334
 335 int wm8350_read_auxadc(struct wm8350 *wm8350, int channel, int scale, int vref)
 336 {
 337         u16 reg, result = 0;
 338
 339         if (channel < WM8350_AUXADC_AUX1 || channel > WM8350_AUXADC_TEMP)
 340                 return -EINVAL;
 341         if (channel >= WM8350_AUXADC_USB && channel <= WM8350_AUXADC_TEMP
 342             && (scale != 0 || vref != 0))
 343                 return -EINVAL;
 344
 345         mutex_lock(&wm8350->auxadc_mutex);
 346
 347         /* Turn on the ADC */
 348         reg = wm8350_reg_read(wm8350, WM8350_POWER_MGMT_5);
 349         wm8350_reg_write(wm8350, WM8350_POWER_MGMT_5, reg | WM8350_AUXADC_ENA);
 350
 351         if (scale || vref) {
 352                 reg = scale << 13;
 353                 reg |= vref << 12;
 354                 wm8350_reg_write(wm8350, WM8350_AUX1_READBACK + channel, reg);
 355         }
 356
 357         reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1);
 358         reg |= 1 << channel | WM8350_AUXADC_POLL;
 359         wm8350_reg_write(wm8350, WM8350_DIGITISER_CONTROL_1, reg);
 360
 361         /* If a late IRQ left the completion signalled then consume
 362          * the completion. */
 363         try_wait_for_completion(&wm8350->auxadc_done);
 364
 365         /* We ignore the result of the completion and just check for a
 366          * conversion result, allowing us to soldier on if the IRQ
 367          * infrastructure is not set up for the chip. */
 368         wait_for_completion_timeout(&wm8350->auxadc_done, msecs_to_jiffies(5));
 369
 370         reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1);
 371         if (reg & WM8350_AUXADC_POLL)
 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 static irqreturn_t wm8350_auxadc_irq(int irq, void *irq_data)
 389 {
 390         struct wm8350 *wm8350 = irq_data;
 391
 392         complete(&wm8350->auxadc_done);
 393
 394         return IRQ_HANDLED;
 395 }
 396
 397 /*
 398  * Cache is always host endian.
 399  */
 400 static int wm8350_create_cache(struct wm8350 *wm8350, int type, int mode)
 401 {
 402         int i, ret = 0;
 403         u16 value;
 404         const u16 *reg_map;
 405
 406         switch (type) {
 407         case 0:
 408                 switch (mode) {
 409 #ifdef CONFIG_MFD_WM8350_CONFIG_MODE_0
 410                 case 0:
 411                         reg_map = wm8350_mode0_defaults;
 412                         break;
 413 #endif
 414 #ifdef CONFIG_MFD_WM8350_CONFIG_MODE_1
 415                 case 1:
 416                         reg_map = wm8350_mode1_defaults;
 417                         break;
 418 #endif
 419 #ifdef CONFIG_MFD_WM8350_CONFIG_MODE_2
 420                 case 2:
 421                         reg_map = wm8350_mode2_defaults;
 422                         break;
 423 #endif
 424 #ifdef CONFIG_MFD_WM8350_CONFIG_MODE_3
 425                 case 3:
 426                         reg_map = wm8350_mode3_defaults;
 427                         break;
 428 #endif
 429                 default:
 430                         dev_err(wm8350->dev,
 431                                 "WM8350 configuration mode %d not supported\n",
 432                                 mode);
 433                         return -EINVAL;
 434                 }
 435                 break;
 436
 437         case 1:
 438                 switch (mode) {
 439 #ifdef CONFIG_MFD_WM8351_CONFIG_MODE_0
 440                 case 0:
 441                         reg_map = wm8351_mode0_defaults;
 442                         break;
 443 #endif
 444 #ifdef CONFIG_MFD_WM8351_CONFIG_MODE_1
 445                 case 1:
 446                         reg_map = wm8351_mode1_defaults;
 447                         break;
 448 #endif
 449 #ifdef CONFIG_MFD_WM8351_CONFIG_MODE_2
 450                 case 2:
 451                         reg_map = wm8351_mode2_defaults;
 452                         break;
 453 #endif
 454 #ifdef CONFIG_MFD_WM8351_CONFIG_MODE_3
 455                 case 3:
 456                         reg_map = wm8351_mode3_defaults;
 457                         break;
 458 #endif
 459                 default:
 460                         dev_err(wm8350->dev,
 461                                 "WM8351 configuration mode %d not supported\n",
 462                                 mode);
 463                         return -EINVAL;
 464                 }
 465                 break;
 466
 467         case 2:
 468                 switch (mode) {
 469 #ifdef CONFIG_MFD_WM8352_CONFIG_MODE_0
 470                 case 0:
 471                         reg_map = wm8352_mode0_defaults;
 472                         break;
 473 #endif
 474 #ifdef CONFIG_MFD_WM8352_CONFIG_MODE_1
 475                 case 1:
 476                         reg_map = wm8352_mode1_defaults;
 477                         break;
 478 #endif
 479 #ifdef CONFIG_MFD_WM8352_CONFIG_MODE_2
 480                 case 2:
 481                         reg_map = wm8352_mode2_defaults;
 482                         break;
 483 #endif
 484 #ifdef CONFIG_MFD_WM8352_CONFIG_MODE_3
 485                 case 3:
 486                         reg_map = wm8352_mode3_defaults;
 487                         break;
 488 #endif
 489                 default:
 490                         dev_err(wm8350->dev,
 491                                 "WM8352 configuration mode %d not supported\n",
 492                                 mode);
 493                         return -EINVAL;
 494                 }
 495                 break;
 496
 497         default:
 498                 dev_err(wm8350->dev,
 499                         "WM835x configuration mode %d not supported\n",
 500                         mode);
 501                 return -EINVAL;
 502         }
 503
 504         wm8350->reg_cache =
 505                 kmalloc(sizeof(u16) * (WM8350_MAX_REGISTER + 1), GFP_KERNEL);
 506         if (wm8350->reg_cache == NULL)
 507                 return -ENOMEM;
 508
 509         /* Read the initial cache state back from the device - this is
 510          * a PMIC so the device many not be in a virgin state and we
 511          * can't rely on the silicon values.
 512          */
 513         ret = regmap_raw_read(wm8350->regmap, 0, wm8350->reg_cache,
 514                               sizeof(u16) * (WM8350_MAX_REGISTER + 1));
 515         if (ret < 0) {
 516                 dev_err(wm8350->dev,
 517                         "failed to read initial cache values\n");
 518                 goto out;
 519         }
 520
 521         /* Mask out uncacheable/unreadable bits and the audio. */
 522         for (i = 0; i < WM8350_MAX_REGISTER; i++) {
 523                 if (wm8350_reg_io_map[i].readable &&
 524                     (i < WM8350_CLOCK_CONTROL_1 || i > WM8350_AIF_TEST)) {
 525                         value = be16_to_cpu(wm8350->reg_cache[i]);
 526                         value &= wm8350_reg_io_map[i].readable;
 527                         wm8350->reg_cache[i] = value;
 528                 } else
 529                         wm8350->reg_cache[i] = reg_map[i];
 530         }
 531
 532 out:
 533         kfree(wm8350->reg_cache);
 534         return ret;
 535 }
 536
 537 /*
 538  * Register a client device.  This is non-fatal since there is no need to
 539  * fail the entire device init due to a single platform device failing.
 540  */
 541 static void wm8350_client_dev_register(struct wm8350 *wm8350,
 542                                        const char *name,
 543                                        struct platform_device **pdev)
 544 {
 545         int ret;
 546
 547         *pdev = platform_device_alloc(name, -1);
 548         if (*pdev == NULL) {
 549                 dev_err(wm8350->dev, "Failed to allocate %s\n", name);
 550                 return;
 551         }
 552
 553         (*pdev)->dev.parent = wm8350->dev;
 554         platform_set_drvdata(*pdev, wm8350);
 555         ret = platform_device_add(*pdev);
 556         if (ret != 0) {
 557                 dev_err(wm8350->dev, "Failed to register %s: %d\n", name, ret);
 558                 platform_device_put(*pdev);
 559                 *pdev = NULL;
 560         }
 561 }
 562
 563 int wm8350_device_init(struct wm8350 *wm8350, int irq,
 564                        struct wm8350_platform_data *pdata)
 565 {
 566         int ret;
 567         unsigned int id1, id2, mask_rev;
 568         unsigned int cust_id, mode, chip_rev;
 569
 570         dev_set_drvdata(wm8350->dev, wm8350);
 571
 572         /* get WM8350 revision and config mode */
 573         ret = regmap_read(wm8350->regmap, WM8350_RESET_ID, &id1);
 574         if (ret != 0) {
 575                 dev_err(wm8350->dev, "Failed to read ID: %d\n", ret);
 576                 goto err;
 577         }
 578
 579         ret = regmap_read(wm8350->regmap, WM8350_ID, &id2);
 580         if (ret != 0) {
 581                 dev_err(wm8350->dev, "Failed to read ID: %d\n", ret);
 582                 goto err;
 583         }
 584
 585         ret = regmap_read(wm8350->regmap, WM8350_REVISION, &mask_rev);
 586         if (ret != 0) {
 587                 dev_err(wm8350->dev, "Failed to read revision: %d\n", ret);
 588                 goto err;
 589         }
 590
 591         if (id1 != 0x6143) {
 592                 dev_err(wm8350->dev,
 593                         "Device with ID %x is not a WM8350\n", id1);
 594                 ret = -ENODEV;
 595                 goto err;
 596         }
 597
 598         mode = id2 & WM8350_CONF_STS_MASK >> 10;
 599         cust_id = id2 & WM8350_CUST_ID_MASK;
 600         chip_rev = (id2 & WM8350_CHIP_REV_MASK) >> 12;
 601         dev_info(wm8350->dev,
 602                  "CONF_STS %d, CUST_ID %d, MASK_REV %d, CHIP_REV %d\n",
 603                  mode, cust_id, mask_rev, chip_rev);
 604
 605         if (cust_id != 0) {
 606                 dev_err(wm8350->dev, "Unsupported CUST_ID\n");
 607                 ret = -ENODEV;
 608                 goto err;
 609         }
 610
 611         switch (mask_rev) {
 612         case 0:
 613                 wm8350->pmic.max_dcdc = WM8350_DCDC_6;
 614                 wm8350->pmic.max_isink = WM8350_ISINK_B;
 615
 616                 switch (chip_rev) {
 617                 case WM8350_REV_E:
 618                         dev_info(wm8350->dev, "WM8350 Rev E\n");
 619                         break;
 620                 case WM8350_REV_F:
 621                         dev_info(wm8350->dev, "WM8350 Rev F\n");
 622                         break;
 623                 case WM8350_REV_G:
 624                         dev_info(wm8350->dev, "WM8350 Rev G\n");
 625                         wm8350->power.rev_g_coeff = 1;
 626                         break;
 627                 case WM8350_REV_H:
 628                         dev_info(wm8350->dev, "WM8350 Rev H\n");
 629                         wm8350->power.rev_g_coeff = 1;
 630                         break;
 631                 default:
 632                         /* For safety we refuse to run on unknown hardware */
 633                         dev_err(wm8350->dev, "Unknown WM8350 CHIP_REV\n");
 634                         ret = -ENODEV;
 635                         goto err;
 636                 }
 637                 break;
 638
 639         case 1:
 640                 wm8350->pmic.max_dcdc = WM8350_DCDC_4;
 641                 wm8350->pmic.max_isink = WM8350_ISINK_A;
 642
 643                 switch (chip_rev) {
 644                 case 0:
 645                         dev_info(wm8350->dev, "WM8351 Rev A\n");
 646                         wm8350->power.rev_g_coeff = 1;
 647                         break;
 648
 649                 case 1:
 650                         dev_info(wm8350->dev, "WM8351 Rev B\n");
 651                         wm8350->power.rev_g_coeff = 1;
 652                         break;
 653
 654                 default:
 655                         dev_err(wm8350->dev, "Unknown WM8351 CHIP_REV\n");
 656                         ret = -ENODEV;
 657                         goto err;
 658                 }
 659                 break;
 660
 661         case 2:
 662                 wm8350->pmic.max_dcdc = WM8350_DCDC_6;
 663                 wm8350->pmic.max_isink = WM8350_ISINK_B;
 664
 665                 switch (chip_rev) {
 666                 case 0:
 667                         dev_info(wm8350->dev, "WM8352 Rev A\n");
 668                         wm8350->power.rev_g_coeff = 1;
 669                         break;
 670
 671                 default:
 672                         dev_err(wm8350->dev, "Unknown WM8352 CHIP_REV\n");
 673                         ret = -ENODEV;
 674                         goto err;
 675                 }
 676                 break;
 677
 678         default:
 679                 dev_err(wm8350->dev, "Unknown MASK_REV\n");
 680                 ret = -ENODEV;
 681                 goto err;
 682         }
 683
 684         ret = wm8350_create_cache(wm8350, mask_rev, mode);
 685         if (ret < 0) {
 686                 dev_err(wm8350->dev, "Failed to create register cache\n");
 687                 return ret;
 688         }
 689
 690         mutex_init(&wm8350->auxadc_mutex);
 691         init_completion(&wm8350->auxadc_done);
 692
 693         ret = wm8350_irq_init(wm8350, irq, pdata);
 694         if (ret < 0)
 695                 goto err_free;
 696
 697         if (wm8350->irq_base) {
 698                 ret = request_threaded_irq(wm8350->irq_base +
 699                                            WM8350_IRQ_AUXADC_DATARDY,
 700                                            NULL, wm8350_auxadc_irq, 0,
 701                                            "auxadc", wm8350);
 702                 if (ret < 0)
 703                         dev_warn(wm8350->dev,
 704                                  "Failed to request AUXADC IRQ: %d\n", ret);
 705         }
 706
 707         if (pdata && pdata->init) {
 708                 ret = pdata->init(wm8350);
 709                 if (ret != 0) {
 710                         dev_err(wm8350->dev, "Platform init() failed: %d\n",
 711                                 ret);
 712                         goto err_irq;
 713                 }
 714         }
 715
 716         wm8350_reg_write(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK, 0x0);
 717
 718         wm8350_client_dev_register(wm8350, "wm8350-codec",
 719                                    &(wm8350->codec.pdev));
 720         wm8350_client_dev_register(wm8350, "wm8350-gpio",
 721                                    &(wm8350->gpio.pdev));
 722         wm8350_client_dev_register(wm8350, "wm8350-hwmon",
 723                                    &(wm8350->hwmon.pdev));
 724         wm8350_client_dev_register(wm8350, "wm8350-power",
 725                                    &(wm8350->power.pdev));
 726         wm8350_client_dev_register(wm8350, "wm8350-rtc", &(wm8350->rtc.pdev));
 727         wm8350_client_dev_register(wm8350, "wm8350-wdt", &(wm8350->wdt.pdev));
 728
 729         return 0;
 730
 731 err_irq:
 732         wm8350_irq_exit(wm8350);
 733 err_free:
 734         kfree(wm8350->reg_cache);
 735 err:
 736         return ret;
 737 }
 738 EXPORT_SYMBOL_GPL(wm8350_device_init);
 739
 740 void wm8350_device_exit(struct wm8350 *wm8350)
 741 {
 742         int i;
 743
 744         for (i = 0; i < ARRAY_SIZE(wm8350->pmic.led); i++)
 745                 platform_device_unregister(wm8350->pmic.led[i].pdev);
 746
 747         for (i = 0; i < ARRAY_SIZE(wm8350->pmic.pdev); i++)
 748                 platform_device_unregister(wm8350->pmic.pdev[i]);
 749
 750         platform_device_unregister(wm8350->wdt.pdev);
 751         platform_device_unregister(wm8350->rtc.pdev);
 752         platform_device_unregister(wm8350->power.pdev);
 753         platform_device_unregister(wm8350->hwmon.pdev);
 754         platform_device_unregister(wm8350->gpio.pdev);
 755         platform_device_unregister(wm8350->codec.pdev);
 756
 757         if (wm8350->irq_base)
 758                 free_irq(wm8350->irq_base + WM8350_IRQ_AUXADC_DATARDY, wm8350);
 759
 760         wm8350_irq_exit(wm8350);
 761
 762         kfree(wm8350->reg_cache);
 763 }
 764 EXPORT_SYMBOL_GPL(wm8350_device_exit);
 765
 766 MODULE_DESCRIPTION("WM8350 AudioPlus PMIC core driver");
 767 MODULE_LICENSE("GPL");