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