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/bcd.h>
  18 #include <linux/delay.h>
  19 #include <linux/mfd/core.h>
  20 #include <linux/slab.h>
  21 #include <linux/err.h>
  22
  23 #include <linux/mfd/wm831x/core.h>
  24 #include <linux/mfd/wm831x/pdata.h>
  25 #include <linux/mfd/wm831x/irq.h>
  26 #include <linux/mfd/wm831x/auxadc.h>
  27 #include <linux/mfd/wm831x/otp.h>
  28 #include <linux/mfd/wm831x/pmu.h>
  29 #include <linux/mfd/wm831x/regulator.h>
  30
  31 /* Current settings - values are 2*2^(reg_val/4) microamps.  These are
  32  * exported since they are used by multiple drivers.
  33  */
  34 int wm831x_isinkv_values[WM831X_ISINK_MAX_ISEL + 1] = {
  35         2,
  36         2,
  37         3,
  38         3,
  39         4,
  40         5,
  41         6,
  42         7,
  43         8,
  44         10,
  45         11,
  46         13,
  47         16,
  48         19,
  49         23,
  50         27,
  51         32,
  52         38,
  53         45,
  54         54,
  55         64,
  56         76,
  57         91,
  58         108,
  59         128,
  60         152,
  61         181,
  62         215,
  63         256,
  64         304,
  65         362,
  66         431,
  67         512,
  68         609,
  69         724,
  70         861,
  71         1024,
  72         1218,
  73         1448,
  74         1722,
  75         2048,
  76         2435,
  77         2896,
  78         3444,
  79         4096,
  80         4871,
  81         5793,
  82         6889,
  83         8192,
  84         9742,
  85         11585,
  86         13777,
  87         16384,
  88         19484,
  89         23170,
  90         27554,
  91 };
  92 EXPORT_SYMBOL_GPL(wm831x_isinkv_values);
  93
  94 static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg)
  95 {
  96         if (!wm831x->locked)
  97                 return 0;
  98
  99         switch (reg) {
 100         case WM831X_WATCHDOG:
 101         case WM831X_DC4_CONTROL:
 102         case WM831X_ON_PIN_CONTROL:
 103         case WM831X_BACKUP_CHARGER_CONTROL:
 104         case WM831X_CHARGER_CONTROL_1:
 105         case WM831X_CHARGER_CONTROL_2:
 106                 return 1;
 107
 108         default:
 109                 return 0;
 110         }
 111 }
 112
 113 /**
 114  * wm831x_reg_unlock: Unlock user keyed registers
 115  *
 116  * The WM831x has a user key preventing writes to particularly
 117  * critical registers.  This function locks those registers,
 118  * allowing writes to them.
 119  */
 120 void wm831x_reg_lock(struct wm831x *wm831x)
 121 {
 122         int ret;
 123
 124         ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
 125         if (ret == 0) {
 126                 dev_vdbg(wm831x->dev, "Registers locked\n");
 127
 128                 mutex_lock(&wm831x->io_lock);
 129                 WARN_ON(wm831x->locked);
 130                 wm831x->locked = 1;
 131                 mutex_unlock(&wm831x->io_lock);
 132         } else {
 133                 dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret);
 134         }
 135
 136 }
 137 EXPORT_SYMBOL_GPL(wm831x_reg_lock);
 138
 139 /**
 140  * wm831x_reg_unlock: Unlock user keyed registers
 141  *
 142  * The WM831x has a user key preventing writes to particularly
 143  * critical registers.  This function locks those registers,
 144  * preventing spurious writes.
 145  */
 146 int wm831x_reg_unlock(struct wm831x *wm831x)
 147 {
 148         int ret;
 149
 150         /* 0x9716 is the value required to unlock the registers */
 151         ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716);
 152         if (ret == 0) {
 153                 dev_vdbg(wm831x->dev, "Registers unlocked\n");
 154
 155                 mutex_lock(&wm831x->io_lock);
 156                 WARN_ON(!wm831x->locked);
 157                 wm831x->locked = 0;
 158                 mutex_unlock(&wm831x->io_lock);
 159         }
 160
 161         return ret;
 162 }
 163 EXPORT_SYMBOL_GPL(wm831x_reg_unlock);
 164
 165 static bool wm831x_reg_readable(struct device *dev, unsigned int reg)
 166 {
 167         switch (reg) {
 168         case WM831X_RESET_ID:
 169         case WM831X_REVISION:
 170         case WM831X_PARENT_ID:
 171         case WM831X_SYSVDD_CONTROL:
 172         case WM831X_THERMAL_MONITORING:
 173         case WM831X_POWER_STATE:
 174         case WM831X_WATCHDOG:
 175         case WM831X_ON_PIN_CONTROL:
 176         case WM831X_RESET_CONTROL:
 177         case WM831X_CONTROL_INTERFACE:
 178         case WM831X_SECURITY_KEY:
 179         case WM831X_SOFTWARE_SCRATCH:
 180         case WM831X_OTP_CONTROL:
 181         case WM831X_GPIO_LEVEL:
 182         case WM831X_SYSTEM_STATUS:
 183         case WM831X_ON_SOURCE:
 184         case WM831X_OFF_SOURCE:
 185         case WM831X_SYSTEM_INTERRUPTS:
 186         case WM831X_INTERRUPT_STATUS_1:
 187         case WM831X_INTERRUPT_STATUS_2:
 188         case WM831X_INTERRUPT_STATUS_3:
 189         case WM831X_INTERRUPT_STATUS_4:
 190         case WM831X_INTERRUPT_STATUS_5:
 191         case WM831X_IRQ_CONFIG:
 192         case WM831X_SYSTEM_INTERRUPTS_MASK:
 193         case WM831X_INTERRUPT_STATUS_1_MASK:
 194         case WM831X_INTERRUPT_STATUS_2_MASK:
 195         case WM831X_INTERRUPT_STATUS_3_MASK:
 196         case WM831X_INTERRUPT_STATUS_4_MASK:
 197         case WM831X_INTERRUPT_STATUS_5_MASK:
 198         case WM831X_RTC_WRITE_COUNTER:
 199         case WM831X_RTC_TIME_1:
 200         case WM831X_RTC_TIME_2:
 201         case WM831X_RTC_ALARM_1:
 202         case WM831X_RTC_ALARM_2:
 203         case WM831X_RTC_CONTROL:
 204         case WM831X_RTC_TRIM:
 205         case WM831X_TOUCH_CONTROL_1:
 206         case WM831X_TOUCH_CONTROL_2:
 207         case WM831X_TOUCH_DATA_X:
 208         case WM831X_TOUCH_DATA_Y:
 209         case WM831X_TOUCH_DATA_Z:
 210         case WM831X_AUXADC_DATA:
 211         case WM831X_AUXADC_CONTROL:
 212         case WM831X_AUXADC_SOURCE:
 213         case WM831X_COMPARATOR_CONTROL:
 214         case WM831X_COMPARATOR_1:
 215         case WM831X_COMPARATOR_2:
 216         case WM831X_COMPARATOR_3:
 217         case WM831X_COMPARATOR_4:
 218         case WM831X_GPIO1_CONTROL:
 219         case WM831X_GPIO2_CONTROL:
 220         case WM831X_GPIO3_CONTROL:
 221         case WM831X_GPIO4_CONTROL:
 222         case WM831X_GPIO5_CONTROL:
 223         case WM831X_GPIO6_CONTROL:
 224         case WM831X_GPIO7_CONTROL:
 225         case WM831X_GPIO8_CONTROL:
 226         case WM831X_GPIO9_CONTROL:
 227         case WM831X_GPIO10_CONTROL:
 228         case WM831X_GPIO11_CONTROL:
 229         case WM831X_GPIO12_CONTROL:
 230         case WM831X_GPIO13_CONTROL:
 231         case WM831X_GPIO14_CONTROL:
 232         case WM831X_GPIO15_CONTROL:
 233         case WM831X_GPIO16_CONTROL:
 234         case WM831X_CHARGER_CONTROL_1:
 235         case WM831X_CHARGER_CONTROL_2:
 236         case WM831X_CHARGER_STATUS:
 237         case WM831X_BACKUP_CHARGER_CONTROL:
 238         case WM831X_STATUS_LED_1:
 239         case WM831X_STATUS_LED_2:
 240         case WM831X_CURRENT_SINK_1:
 241         case WM831X_CURRENT_SINK_2:
 242         case WM831X_DCDC_ENABLE:
 243         case WM831X_LDO_ENABLE:
 244         case WM831X_DCDC_STATUS:
 245         case WM831X_LDO_STATUS:
 246         case WM831X_DCDC_UV_STATUS:
 247         case WM831X_LDO_UV_STATUS:
 248         case WM831X_DC1_CONTROL_1:
 249         case WM831X_DC1_CONTROL_2:
 250         case WM831X_DC1_ON_CONFIG:
 251         case WM831X_DC1_SLEEP_CONTROL:
 252         case WM831X_DC1_DVS_CONTROL:
 253         case WM831X_DC2_CONTROL_1:
 254         case WM831X_DC2_CONTROL_2:
 255         case WM831X_DC2_ON_CONFIG:
 256         case WM831X_DC2_SLEEP_CONTROL:
 257         case WM831X_DC2_DVS_CONTROL:
 258         case WM831X_DC3_CONTROL_1:
 259         case WM831X_DC3_CONTROL_2:
 260         case WM831X_DC3_ON_CONFIG:
 261         case WM831X_DC3_SLEEP_CONTROL:
 262         case WM831X_DC4_CONTROL:
 263         case WM831X_DC4_SLEEP_CONTROL:
 264         case WM831X_EPE1_CONTROL:
 265         case WM831X_EPE2_CONTROL:
 266         case WM831X_LDO1_CONTROL:
 267         case WM831X_LDO1_ON_CONTROL:
 268         case WM831X_LDO1_SLEEP_CONTROL:
 269         case WM831X_LDO2_CONTROL:
 270         case WM831X_LDO2_ON_CONTROL:
 271         case WM831X_LDO2_SLEEP_CONTROL:
 272         case WM831X_LDO3_CONTROL:
 273         case WM831X_LDO3_ON_CONTROL:
 274         case WM831X_LDO3_SLEEP_CONTROL:
 275         case WM831X_LDO4_CONTROL:
 276         case WM831X_LDO4_ON_CONTROL:
 277         case WM831X_LDO4_SLEEP_CONTROL:
 278         case WM831X_LDO5_CONTROL:
 279         case WM831X_LDO5_ON_CONTROL:
 280         case WM831X_LDO5_SLEEP_CONTROL:
 281         case WM831X_LDO6_CONTROL:
 282         case WM831X_LDO6_ON_CONTROL:
 283         case WM831X_LDO6_SLEEP_CONTROL:
 284         case WM831X_LDO7_CONTROL:
 285         case WM831X_LDO7_ON_CONTROL:
 286         case WM831X_LDO7_SLEEP_CONTROL:
 287         case WM831X_LDO8_CONTROL:
 288         case WM831X_LDO8_ON_CONTROL:
 289         case WM831X_LDO8_SLEEP_CONTROL:
 290         case WM831X_LDO9_CONTROL:
 291         case WM831X_LDO9_ON_CONTROL:
 292         case WM831X_LDO9_SLEEP_CONTROL:
 293         case WM831X_LDO10_CONTROL:
 294         case WM831X_LDO10_ON_CONTROL:
 295         case WM831X_LDO10_SLEEP_CONTROL:
 296         case WM831X_LDO11_ON_CONTROL:
 297         case WM831X_LDO11_SLEEP_CONTROL:
 298         case WM831X_POWER_GOOD_SOURCE_1:
 299         case WM831X_POWER_GOOD_SOURCE_2:
 300         case WM831X_CLOCK_CONTROL_1:
 301         case WM831X_CLOCK_CONTROL_2:
 302         case WM831X_FLL_CONTROL_1:
 303         case WM831X_FLL_CONTROL_2:
 304         case WM831X_FLL_CONTROL_3:
 305         case WM831X_FLL_CONTROL_4:
 306         case WM831X_FLL_CONTROL_5:
 307         case WM831X_UNIQUE_ID_1:
 308         case WM831X_UNIQUE_ID_2:
 309         case WM831X_UNIQUE_ID_3:
 310         case WM831X_UNIQUE_ID_4:
 311         case WM831X_UNIQUE_ID_5:
 312         case WM831X_UNIQUE_ID_6:
 313         case WM831X_UNIQUE_ID_7:
 314         case WM831X_UNIQUE_ID_8:
 315         case WM831X_FACTORY_OTP_ID:
 316         case WM831X_FACTORY_OTP_1:
 317         case WM831X_FACTORY_OTP_2:
 318         case WM831X_FACTORY_OTP_3:
 319         case WM831X_FACTORY_OTP_4:
 320         case WM831X_FACTORY_OTP_5:
 321         case WM831X_CUSTOMER_OTP_ID:
 322         case WM831X_DC1_OTP_CONTROL:
 323         case WM831X_DC2_OTP_CONTROL:
 324         case WM831X_DC3_OTP_CONTROL:
 325         case WM831X_LDO1_2_OTP_CONTROL:
 326         case WM831X_LDO3_4_OTP_CONTROL:
 327         case WM831X_LDO5_6_OTP_CONTROL:
 328         case WM831X_LDO7_8_OTP_CONTROL:
 329         case WM831X_LDO9_10_OTP_CONTROL:
 330         case WM831X_LDO11_EPE_CONTROL:
 331         case WM831X_GPIO1_OTP_CONTROL:
 332         case WM831X_GPIO2_OTP_CONTROL:
 333         case WM831X_GPIO3_OTP_CONTROL:
 334         case WM831X_GPIO4_OTP_CONTROL:
 335         case WM831X_GPIO5_OTP_CONTROL:
 336         case WM831X_GPIO6_OTP_CONTROL:
 337         case WM831X_DBE_CHECK_DATA:
 338                 return true;
 339         default:
 340                 return false;
 341         }
 342 }
 343
 344 static bool wm831x_reg_writeable(struct device *dev, unsigned int reg)
 345 {
 346         struct wm831x *wm831x = dev_get_drvdata(dev);
 347
 348         if (wm831x_reg_locked(wm831x, reg))
 349                 return false;
 350
 351         switch (reg) {
 352         case WM831X_SYSVDD_CONTROL:
 353         case WM831X_THERMAL_MONITORING:
 354         case WM831X_POWER_STATE:
 355         case WM831X_WATCHDOG:
 356         case WM831X_ON_PIN_CONTROL:
 357         case WM831X_RESET_CONTROL:
 358         case WM831X_CONTROL_INTERFACE:
 359         case WM831X_SECURITY_KEY:
 360         case WM831X_SOFTWARE_SCRATCH:
 361         case WM831X_OTP_CONTROL:
 362         case WM831X_GPIO_LEVEL:
 363         case WM831X_INTERRUPT_STATUS_1:
 364         case WM831X_INTERRUPT_STATUS_2:
 365         case WM831X_INTERRUPT_STATUS_3:
 366         case WM831X_INTERRUPT_STATUS_4:
 367         case WM831X_INTERRUPT_STATUS_5:
 368         case WM831X_IRQ_CONFIG:
 369         case WM831X_SYSTEM_INTERRUPTS_MASK:
 370         case WM831X_INTERRUPT_STATUS_1_MASK:
 371         case WM831X_INTERRUPT_STATUS_2_MASK:
 372         case WM831X_INTERRUPT_STATUS_3_MASK:
 373         case WM831X_INTERRUPT_STATUS_4_MASK:
 374         case WM831X_INTERRUPT_STATUS_5_MASK:
 375         case WM831X_RTC_TIME_1:
 376         case WM831X_RTC_TIME_2:
 377         case WM831X_RTC_ALARM_1:
 378         case WM831X_RTC_ALARM_2:
 379         case WM831X_RTC_CONTROL:
 380         case WM831X_RTC_TRIM:
 381         case WM831X_TOUCH_CONTROL_1:
 382         case WM831X_TOUCH_CONTROL_2:
 383         case WM831X_AUXADC_CONTROL:
 384         case WM831X_AUXADC_SOURCE:
 385         case WM831X_COMPARATOR_CONTROL:
 386         case WM831X_COMPARATOR_1:
 387         case WM831X_COMPARATOR_2:
 388         case WM831X_COMPARATOR_3:
 389         case WM831X_COMPARATOR_4:
 390         case WM831X_GPIO1_CONTROL:
 391         case WM831X_GPIO2_CONTROL:
 392         case WM831X_GPIO3_CONTROL:
 393         case WM831X_GPIO4_CONTROL:
 394         case WM831X_GPIO5_CONTROL:
 395         case WM831X_GPIO6_CONTROL:
 396         case WM831X_GPIO7_CONTROL:
 397         case WM831X_GPIO8_CONTROL:
 398         case WM831X_GPIO9_CONTROL:
 399         case WM831X_GPIO10_CONTROL:
 400         case WM831X_GPIO11_CONTROL:
 401         case WM831X_GPIO12_CONTROL:
 402         case WM831X_GPIO13_CONTROL:
 403         case WM831X_GPIO14_CONTROL:
 404         case WM831X_GPIO15_CONTROL:
 405         case WM831X_GPIO16_CONTROL:
 406         case WM831X_CHARGER_CONTROL_1:
 407         case WM831X_CHARGER_CONTROL_2:
 408         case WM831X_CHARGER_STATUS:
 409         case WM831X_BACKUP_CHARGER_CONTROL:
 410         case WM831X_STATUS_LED_1:
 411         case WM831X_STATUS_LED_2:
 412         case WM831X_CURRENT_SINK_1:
 413         case WM831X_CURRENT_SINK_2:
 414         case WM831X_DCDC_ENABLE:
 415         case WM831X_LDO_ENABLE:
 416         case WM831X_DC1_CONTROL_1:
 417         case WM831X_DC1_CONTROL_2:
 418         case WM831X_DC1_ON_CONFIG:
 419         case WM831X_DC1_SLEEP_CONTROL:
 420         case WM831X_DC1_DVS_CONTROL:
 421         case WM831X_DC2_CONTROL_1:
 422         case WM831X_DC2_CONTROL_2:
 423         case WM831X_DC2_ON_CONFIG:
 424         case WM831X_DC2_SLEEP_CONTROL:
 425         case WM831X_DC2_DVS_CONTROL:
 426         case WM831X_DC3_CONTROL_1:
 427         case WM831X_DC3_CONTROL_2:
 428         case WM831X_DC3_ON_CONFIG:
 429         case WM831X_DC3_SLEEP_CONTROL:
 430         case WM831X_DC4_CONTROL:
 431         case WM831X_DC4_SLEEP_CONTROL:
 432         case WM831X_EPE1_CONTROL:
 433         case WM831X_EPE2_CONTROL:
 434         case WM831X_LDO1_CONTROL:
 435         case WM831X_LDO1_ON_CONTROL:
 436         case WM831X_LDO1_SLEEP_CONTROL:
 437         case WM831X_LDO2_CONTROL:
 438         case WM831X_LDO2_ON_CONTROL:
 439         case WM831X_LDO2_SLEEP_CONTROL:
 440         case WM831X_LDO3_CONTROL:
 441         case WM831X_LDO3_ON_CONTROL:
 442         case WM831X_LDO3_SLEEP_CONTROL:
 443         case WM831X_LDO4_CONTROL:
 444         case WM831X_LDO4_ON_CONTROL:
 445         case WM831X_LDO4_SLEEP_CONTROL:
 446         case WM831X_LDO5_CONTROL:
 447         case WM831X_LDO5_ON_CONTROL:
 448         case WM831X_LDO5_SLEEP_CONTROL:
 449         case WM831X_LDO6_CONTROL:
 450         case WM831X_LDO6_ON_CONTROL:
 451         case WM831X_LDO6_SLEEP_CONTROL:
 452         case WM831X_LDO7_CONTROL:
 453         case WM831X_LDO7_ON_CONTROL:
 454         case WM831X_LDO7_SLEEP_CONTROL:
 455         case WM831X_LDO8_CONTROL:
 456         case WM831X_LDO8_ON_CONTROL:
 457         case WM831X_LDO8_SLEEP_CONTROL:
 458         case WM831X_LDO9_CONTROL:
 459         case WM831X_LDO9_ON_CONTROL:
 460         case WM831X_LDO9_SLEEP_CONTROL:
 461         case WM831X_LDO10_CONTROL:
 462         case WM831X_LDO10_ON_CONTROL:
 463         case WM831X_LDO10_SLEEP_CONTROL:
 464         case WM831X_LDO11_ON_CONTROL:
 465         case WM831X_LDO11_SLEEP_CONTROL:
 466         case WM831X_POWER_GOOD_SOURCE_1:
 467         case WM831X_POWER_GOOD_SOURCE_2:
 468         case WM831X_CLOCK_CONTROL_1:
 469         case WM831X_CLOCK_CONTROL_2:
 470         case WM831X_FLL_CONTROL_1:
 471         case WM831X_FLL_CONTROL_2:
 472         case WM831X_FLL_CONTROL_3:
 473         case WM831X_FLL_CONTROL_4:
 474         case WM831X_FLL_CONTROL_5:
 475                 return true;
 476         default:
 477                 return false;
 478         }
 479 }
 480
 481 static bool wm831x_reg_volatile(struct device *dev, unsigned int reg)
 482 {
 483         switch (reg) {
 484         case WM831X_SYSTEM_STATUS:
 485         case WM831X_ON_SOURCE:
 486         case WM831X_OFF_SOURCE:
 487         case WM831X_GPIO_LEVEL:
 488         case WM831X_SYSTEM_INTERRUPTS:
 489         case WM831X_INTERRUPT_STATUS_1:
 490         case WM831X_INTERRUPT_STATUS_2:
 491         case WM831X_INTERRUPT_STATUS_3:
 492         case WM831X_INTERRUPT_STATUS_4:
 493         case WM831X_INTERRUPT_STATUS_5:
 494         case WM831X_RTC_TIME_1:
 495         case WM831X_RTC_TIME_2:
 496         case WM831X_TOUCH_DATA_X:
 497         case WM831X_TOUCH_DATA_Y:
 498         case WM831X_TOUCH_DATA_Z:
 499         case WM831X_AUXADC_DATA:
 500         case WM831X_CHARGER_STATUS:
 501         case WM831X_DCDC_STATUS:
 502         case WM831X_LDO_STATUS:
 503         case WM831X_DCDC_UV_STATUS:
 504         case WM831X_LDO_UV_STATUS:
 505                 return true;
 506         default:
 507                 return false;
 508         }
 509 }
 510
 511 /**
 512  * wm831x_reg_read: Read a single WM831x register.
 513  *
 514  * @wm831x: Device to read from.
 515  * @reg: Register to read.
 516  */
 517 int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
 518 {
 519         unsigned int val;
 520         int ret;
 521
 522         ret = regmap_read(wm831x->regmap, reg, &val);
 523
 524         if (ret < 0)
 525                 return ret;
 526         else
 527                 return val;
 528 }
 529 EXPORT_SYMBOL_GPL(wm831x_reg_read);
 530
 531 /**
 532  * wm831x_bulk_read: Read multiple WM831x registers
 533  *
 534  * @wm831x: Device to read from
 535  * @reg: First register
 536  * @count: Number of registers
 537  * @buf: Buffer to fill.
 538  */
 539 int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
 540                      int count, u16 *buf)
 541 {
 542         return regmap_bulk_read(wm831x->regmap, reg, buf, count);
 543 }
 544 EXPORT_SYMBOL_GPL(wm831x_bulk_read);
 545
 546 static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
 547                         int bytes, void *src)
 548 {
 549         u16 *buf = src;
 550         int i, ret;
 551
 552         BUG_ON(bytes % 2);
 553         BUG_ON(bytes <= 0);
 554
 555         for (i = 0; i < bytes / 2; i++) {
 556                 if (wm831x_reg_locked(wm831x, reg))
 557                         return -EPERM;
 558
 559                 dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
 560                          buf[i], reg + i, reg + i);
 561                 ret = regmap_write(wm831x->regmap, reg + i, buf[i]);
 562                 if (ret != 0)
 563                         return ret;
 564         }
 565
 566         return 0;
 567 }
 568
 569 /**
 570  * wm831x_reg_write: Write a single WM831x register.
 571  *
 572  * @wm831x: Device to write to.
 573  * @reg: Register to write to.
 574  * @val: Value to write.
 575  */
 576 int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg,
 577                      unsigned short val)
 578 {
 579         int ret;
 580
 581         mutex_lock(&wm831x->io_lock);
 582
 583         ret = wm831x_write(wm831x, reg, 2, &val);
 584
 585         mutex_unlock(&wm831x->io_lock);
 586
 587         return ret;
 588 }
 589 EXPORT_SYMBOL_GPL(wm831x_reg_write);
 590
 591 /**
 592  * wm831x_set_bits: Set the value of a bitfield in a WM831x register
 593  *
 594  * @wm831x: Device to write to.
 595  * @reg: Register to write to.
 596  * @mask: Mask of bits to set.
 597  * @val: Value to set (unshifted)
 598  */
 599 int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
 600                     unsigned short mask, unsigned short val)
 601 {
 602         int ret;
 603
 604         mutex_lock(&wm831x->io_lock);
 605
 606         if (!wm831x_reg_locked(wm831x, reg))
 607                 ret = regmap_update_bits(wm831x->regmap, reg, mask, val);
 608         else
 609                 ret = -EPERM;
 610
 611         mutex_unlock(&wm831x->io_lock);
 612
 613         return ret;
 614 }
 615 EXPORT_SYMBOL_GPL(wm831x_set_bits);
 616
 617 static struct resource wm831x_dcdc1_resources[] = {
 618         {
 619                 .start = WM831X_DC1_CONTROL_1,
 620                 .end   = WM831X_DC1_DVS_CONTROL,
 621                 .flags = IORESOURCE_REG,
 622         },
 623         {
 624                 .name  = "UV",
 625                 .start = WM831X_IRQ_UV_DC1,
 626                 .end   = WM831X_IRQ_UV_DC1,
 627                 .flags = IORESOURCE_IRQ,
 628         },
 629         {
 630                 .name  = "HC",
 631                 .start = WM831X_IRQ_HC_DC1,
 632                 .end   = WM831X_IRQ_HC_DC1,
 633                 .flags = IORESOURCE_IRQ,
 634         },
 635 };
 636
 637
 638 static struct resource wm831x_dcdc2_resources[] = {
 639         {
 640                 .start = WM831X_DC2_CONTROL_1,
 641                 .end   = WM831X_DC2_DVS_CONTROL,
 642                 .flags = IORESOURCE_REG,
 643         },
 644         {
 645                 .name  = "UV",
 646                 .start = WM831X_IRQ_UV_DC2,
 647                 .end   = WM831X_IRQ_UV_DC2,
 648                 .flags = IORESOURCE_IRQ,
 649         },
 650         {
 651                 .name  = "HC",
 652                 .start = WM831X_IRQ_HC_DC2,
 653                 .end   = WM831X_IRQ_HC_DC2,
 654                 .flags = IORESOURCE_IRQ,
 655         },
 656 };
 657
 658 static struct resource wm831x_dcdc3_resources[] = {
 659         {
 660                 .start = WM831X_DC3_CONTROL_1,
 661                 .end   = WM831X_DC3_SLEEP_CONTROL,
 662                 .flags = IORESOURCE_REG,
 663         },
 664         {
 665                 .name  = "UV",
 666                 .start = WM831X_IRQ_UV_DC3,
 667                 .end   = WM831X_IRQ_UV_DC3,
 668                 .flags = IORESOURCE_IRQ,
 669         },
 670 };
 671
 672 static struct resource wm831x_dcdc4_resources[] = {
 673         {
 674                 .start = WM831X_DC4_CONTROL,
 675                 .end   = WM831X_DC4_SLEEP_CONTROL,
 676                 .flags = IORESOURCE_REG,
 677         },
 678         {
 679                 .name  = "UV",
 680                 .start = WM831X_IRQ_UV_DC4,
 681                 .end   = WM831X_IRQ_UV_DC4,
 682                 .flags = IORESOURCE_IRQ,
 683         },
 684 };
 685
 686 static struct resource wm8320_dcdc4_buck_resources[] = {
 687         {
 688                 .start = WM831X_DC4_CONTROL,
 689                 .end   = WM832X_DC4_SLEEP_CONTROL,
 690                 .flags = IORESOURCE_REG,
 691         },
 692         {
 693                 .name  = "UV",
 694                 .start = WM831X_IRQ_UV_DC4,
 695                 .end   = WM831X_IRQ_UV_DC4,
 696                 .flags = IORESOURCE_IRQ,
 697         },
 698 };
 699
 700 static struct resource wm831x_gpio_resources[] = {
 701         {
 702                 .start = WM831X_IRQ_GPIO_1,
 703                 .end   = WM831X_IRQ_GPIO_16,
 704                 .flags = IORESOURCE_IRQ,
 705         },
 706 };
 707
 708 static struct resource wm831x_isink1_resources[] = {
 709         {
 710                 .start = WM831X_CURRENT_SINK_1,
 711                 .end   = WM831X_CURRENT_SINK_1,
 712                 .flags = IORESOURCE_REG,
 713         },
 714         {
 715                 .start = WM831X_IRQ_CS1,
 716                 .end   = WM831X_IRQ_CS1,
 717                 .flags = IORESOURCE_IRQ,
 718         },
 719 };
 720
 721 static struct resource wm831x_isink2_resources[] = {
 722         {
 723                 .start = WM831X_CURRENT_SINK_2,
 724                 .end   = WM831X_CURRENT_SINK_2,
 725                 .flags = IORESOURCE_REG,
 726         },
 727         {
 728                 .start = WM831X_IRQ_CS2,
 729                 .end   = WM831X_IRQ_CS2,
 730                 .flags = IORESOURCE_IRQ,
 731         },
 732 };
 733
 734 static struct resource wm831x_ldo1_resources[] = {
 735         {
 736                 .start = WM831X_LDO1_CONTROL,
 737                 .end   = WM831X_LDO1_SLEEP_CONTROL,
 738                 .flags = IORESOURCE_REG,
 739         },
 740         {
 741                 .name  = "UV",
 742                 .start = WM831X_IRQ_UV_LDO1,
 743                 .end   = WM831X_IRQ_UV_LDO1,
 744                 .flags = IORESOURCE_IRQ,
 745         },
 746 };
 747
 748 static struct resource wm831x_ldo2_resources[] = {
 749         {
 750                 .start = WM831X_LDO2_CONTROL,
 751                 .end   = WM831X_LDO2_SLEEP_CONTROL,
 752                 .flags = IORESOURCE_REG,
 753         },
 754         {
 755                 .name  = "UV",
 756                 .start = WM831X_IRQ_UV_LDO2,
 757                 .end   = WM831X_IRQ_UV_LDO2,
 758                 .flags = IORESOURCE_IRQ,
 759         },
 760 };
 761
 762 static struct resource wm831x_ldo3_resources[] = {
 763         {
 764                 .start = WM831X_LDO3_CONTROL,
 765                 .end   = WM831X_LDO3_SLEEP_CONTROL,
 766                 .flags = IORESOURCE_REG,
 767         },
 768         {
 769                 .name  = "UV",
 770                 .start = WM831X_IRQ_UV_LDO3,
 771                 .end   = WM831X_IRQ_UV_LDO3,
 772                 .flags = IORESOURCE_IRQ,
 773         },
 774 };
 775
 776 static struct resource wm831x_ldo4_resources[] = {
 777         {
 778                 .start = WM831X_LDO4_CONTROL,
 779                 .end   = WM831X_LDO4_SLEEP_CONTROL,
 780                 .flags = IORESOURCE_REG,
 781         },
 782         {
 783                 .name  = "UV",
 784                 .start = WM831X_IRQ_UV_LDO4,
 785                 .end   = WM831X_IRQ_UV_LDO4,
 786                 .flags = IORESOURCE_IRQ,
 787         },
 788 };
 789
 790 static struct resource wm831x_ldo5_resources[] = {
 791         {
 792                 .start = WM831X_LDO5_CONTROL,
 793                 .end   = WM831X_LDO5_SLEEP_CONTROL,
 794                 .flags = IORESOURCE_REG,
 795         },
 796         {
 797                 .name  = "UV",
 798                 .start = WM831X_IRQ_UV_LDO5,
 799                 .end   = WM831X_IRQ_UV_LDO5,
 800                 .flags = IORESOURCE_IRQ,
 801         },
 802 };
 803
 804 static struct resource wm831x_ldo6_resources[] = {
 805         {
 806                 .start = WM831X_LDO6_CONTROL,
 807                 .end   = WM831X_LDO6_SLEEP_CONTROL,
 808                 .flags = IORESOURCE_REG,
 809         },
 810         {
 811                 .name  = "UV",
 812                 .start = WM831X_IRQ_UV_LDO6,
 813                 .end   = WM831X_IRQ_UV_LDO6,
 814                 .flags = IORESOURCE_IRQ,
 815         },
 816 };
 817
 818 static struct resource wm831x_ldo7_resources[] = {
 819         {
 820                 .start = WM831X_LDO7_CONTROL,
 821                 .end   = WM831X_LDO7_SLEEP_CONTROL,
 822                 .flags = IORESOURCE_REG,
 823         },
 824         {
 825                 .name  = "UV",
 826                 .start = WM831X_IRQ_UV_LDO7,
 827                 .end   = WM831X_IRQ_UV_LDO7,
 828                 .flags = IORESOURCE_IRQ,
 829         },
 830 };
 831
 832 static struct resource wm831x_ldo8_resources[] = {
 833         {
 834                 .start = WM831X_LDO8_CONTROL,
 835                 .end   = WM831X_LDO8_SLEEP_CONTROL,
 836                 .flags = IORESOURCE_REG,
 837         },
 838         {
 839                 .name  = "UV",
 840                 .start = WM831X_IRQ_UV_LDO8,
 841                 .end   = WM831X_IRQ_UV_LDO8,
 842                 .flags = IORESOURCE_IRQ,
 843         },
 844 };
 845
 846 static struct resource wm831x_ldo9_resources[] = {
 847         {
 848                 .start = WM831X_LDO9_CONTROL,
 849                 .end   = WM831X_LDO9_SLEEP_CONTROL,
 850                 .flags = IORESOURCE_REG,
 851         },
 852         {
 853                 .name  = "UV",
 854                 .start = WM831X_IRQ_UV_LDO9,
 855                 .end   = WM831X_IRQ_UV_LDO9,
 856                 .flags = IORESOURCE_IRQ,
 857         },
 858 };
 859
 860 static struct resource wm831x_ldo10_resources[] = {
 861         {
 862                 .start = WM831X_LDO10_CONTROL,
 863                 .end   = WM831X_LDO10_SLEEP_CONTROL,
 864                 .flags = IORESOURCE_REG,
 865         },
 866         {
 867                 .name  = "UV",
 868                 .start = WM831X_IRQ_UV_LDO10,
 869                 .end   = WM831X_IRQ_UV_LDO10,
 870                 .flags = IORESOURCE_IRQ,
 871         },
 872 };
 873
 874 static struct resource wm831x_ldo11_resources[] = {
 875         {
 876                 .start = WM831X_LDO11_ON_CONTROL,
 877                 .end   = WM831X_LDO11_SLEEP_CONTROL,
 878                 .flags = IORESOURCE_REG,
 879         },
 880 };
 881
 882 static struct resource wm831x_on_resources[] = {
 883         {
 884                 .start = WM831X_IRQ_ON,
 885                 .end   = WM831X_IRQ_ON,
 886                 .flags = IORESOURCE_IRQ,
 887         },
 888 };
 889
 890
 891 static struct resource wm831x_power_resources[] = {
 892         {
 893                 .name = "SYSLO",
 894                 .start = WM831X_IRQ_PPM_SYSLO,
 895                 .end   = WM831X_IRQ_PPM_SYSLO,
 896                 .flags = IORESOURCE_IRQ,
 897         },
 898         {
 899                 .name = "PWR SRC",
 900                 .start = WM831X_IRQ_PPM_PWR_SRC,
 901                 .end   = WM831X_IRQ_PPM_PWR_SRC,
 902                 .flags = IORESOURCE_IRQ,
 903         },
 904         {
 905                 .name = "USB CURR",
 906                 .start = WM831X_IRQ_PPM_USB_CURR,
 907                 .end   = WM831X_IRQ_PPM_USB_CURR,
 908                 .flags = IORESOURCE_IRQ,
 909         },
 910         {
 911                 .name = "BATT HOT",
 912                 .start = WM831X_IRQ_CHG_BATT_HOT,
 913                 .end   = WM831X_IRQ_CHG_BATT_HOT,
 914                 .flags = IORESOURCE_IRQ,
 915         },
 916         {
 917                 .name = "BATT COLD",
 918                 .start = WM831X_IRQ_CHG_BATT_COLD,
 919                 .end   = WM831X_IRQ_CHG_BATT_COLD,
 920                 .flags = IORESOURCE_IRQ,
 921         },
 922         {
 923                 .name = "BATT FAIL",
 924                 .start = WM831X_IRQ_CHG_BATT_FAIL,
 925                 .end   = WM831X_IRQ_CHG_BATT_FAIL,
 926                 .flags = IORESOURCE_IRQ,
 927         },
 928         {
 929                 .name = "OV",
 930                 .start = WM831X_IRQ_CHG_OV,
 931                 .end   = WM831X_IRQ_CHG_OV,
 932                 .flags = IORESOURCE_IRQ,
 933         },
 934         {
 935                 .name = "END",
 936                 .start = WM831X_IRQ_CHG_END,
 937                 .end   = WM831X_IRQ_CHG_END,
 938                 .flags = IORESOURCE_IRQ,
 939         },
 940         {
 941                 .name = "TO",
 942                 .start = WM831X_IRQ_CHG_TO,
 943                 .end   = WM831X_IRQ_CHG_TO,
 944                 .flags = IORESOURCE_IRQ,
 945         },
 946         {
 947                 .name = "MODE",
 948                 .start = WM831X_IRQ_CHG_MODE,
 949                 .end   = WM831X_IRQ_CHG_MODE,
 950                 .flags = IORESOURCE_IRQ,
 951         },
 952         {
 953                 .name = "START",
 954                 .start = WM831X_IRQ_CHG_START,
 955                 .end   = WM831X_IRQ_CHG_START,
 956                 .flags = IORESOURCE_IRQ,
 957         },
 958 };
 959
 960 static struct resource wm831x_rtc_resources[] = {
 961         {
 962                 .name = "PER",
 963                 .start = WM831X_IRQ_RTC_PER,
 964                 .end   = WM831X_IRQ_RTC_PER,
 965                 .flags = IORESOURCE_IRQ,
 966         },
 967         {
 968                 .name = "ALM",
 969                 .start = WM831X_IRQ_RTC_ALM,
 970                 .end   = WM831X_IRQ_RTC_ALM,
 971                 .flags = IORESOURCE_IRQ,
 972         },
 973 };
 974
 975 static struct resource wm831x_status1_resources[] = {
 976         {
 977                 .start = WM831X_STATUS_LED_1,
 978                 .end   = WM831X_STATUS_LED_1,
 979                 .flags = IORESOURCE_REG,
 980         },
 981 };
 982
 983 static struct resource wm831x_status2_resources[] = {
 984         {
 985                 .start = WM831X_STATUS_LED_2,
 986                 .end   = WM831X_STATUS_LED_2,
 987                 .flags = IORESOURCE_REG,
 988         },
 989 };
 990
 991 static struct resource wm831x_touch_resources[] = {
 992         {
 993                 .name = "TCHPD",
 994                 .start = WM831X_IRQ_TCHPD,
 995                 .end   = WM831X_IRQ_TCHPD,
 996                 .flags = IORESOURCE_IRQ,
 997         },
 998         {
 999                 .name = "TCHDATA",
1000                 .start = WM831X_IRQ_TCHDATA,
1001                 .end   = WM831X_IRQ_TCHDATA,
1002                 .flags = IORESOURCE_IRQ,
1003         },
1004 };
1005
1006 static struct resource wm831x_wdt_resources[] = {
1007         {
1008                 .start = WM831X_IRQ_WDOG_TO,
1009                 .end   = WM831X_IRQ_WDOG_TO,
1010                 .flags = IORESOURCE_IRQ,
1011         },
1012 };
1013
1014 static const struct mfd_cell wm8310_devs[] = {
1015         {
1016                 .name = "wm831x-backup",
1017         },
1018         {
1019                 .name = "wm831x-buckv",
1020                 .id = 1,
1021                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1022                 .resources = wm831x_dcdc1_resources,
1023         },
1024         {
1025                 .name = "wm831x-buckv",
1026                 .id = 2,
1027                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1028                 .resources = wm831x_dcdc2_resources,
1029         },
1030         {
1031                 .name = "wm831x-buckp",
1032                 .id = 3,
1033                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1034                 .resources = wm831x_dcdc3_resources,
1035         },
1036         {
1037                 .name = "wm831x-boostp",
1038                 .id = 4,
1039                 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1040                 .resources = wm831x_dcdc4_resources,
1041         },
1042         {
1043                 .name = "wm831x-clk",
1044         },
1045         {
1046                 .name = "wm831x-epe",
1047                 .id = 1,
1048         },
1049         {
1050                 .name = "wm831x-epe",
1051                 .id = 2,
1052         },
1053         {
1054                 .name = "wm831x-gpio",
1055                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1056                 .resources = wm831x_gpio_resources,
1057         },
1058         {
1059                 .name = "wm831x-hwmon",
1060         },
1061         {
1062                 .name = "wm831x-isink",
1063                 .id = 1,
1064                 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1065                 .resources = wm831x_isink1_resources,
1066         },
1067         {
1068                 .name = "wm831x-isink",
1069                 .id = 2,
1070                 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1071                 .resources = wm831x_isink2_resources,
1072         },
1073         {
1074                 .name = "wm831x-ldo",
1075                 .id = 1,
1076                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1077                 .resources = wm831x_ldo1_resources,
1078         },
1079         {
1080                 .name = "wm831x-ldo",
1081                 .id = 2,
1082                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1083                 .resources = wm831x_ldo2_resources,
1084         },
1085         {
1086                 .name = "wm831x-ldo",
1087                 .id = 3,
1088                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1089                 .resources = wm831x_ldo3_resources,
1090         },
1091         {
1092                 .name = "wm831x-ldo",
1093                 .id = 4,
1094                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1095                 .resources = wm831x_ldo4_resources,
1096         },
1097         {
1098                 .name = "wm831x-ldo",
1099                 .id = 5,
1100                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1101                 .resources = wm831x_ldo5_resources,
1102         },
1103         {
1104                 .name = "wm831x-ldo",
1105                 .id = 6,
1106                 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1107                 .resources = wm831x_ldo6_resources,
1108         },
1109         {
1110                 .name = "wm831x-aldo",
1111                 .id = 7,
1112                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1113                 .resources = wm831x_ldo7_resources,
1114         },
1115         {
1116                 .name = "wm831x-aldo",
1117                 .id = 8,
1118                 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1119                 .resources = wm831x_ldo8_resources,
1120         },
1121         {
1122                 .name = "wm831x-aldo",
1123                 .id = 9,
1124                 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1125                 .resources = wm831x_ldo9_resources,
1126         },
1127         {
1128                 .name = "wm831x-aldo",
1129                 .id = 10,
1130                 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1131                 .resources = wm831x_ldo10_resources,
1132         },
1133         {
1134                 .name = "wm831x-alive-ldo",
1135                 .id = 11,
1136                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1137                 .resources = wm831x_ldo11_resources,
1138         },
1139         {
1140                 .name = "wm831x-on",
1141                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1142                 .resources = wm831x_on_resources,
1143         },
1144         {
1145                 .name = "wm831x-power",
1146                 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1147                 .resources = wm831x_power_resources,
1148         },
1149         {
1150                 .name = "wm831x-status",
1151                 .id = 1,
1152                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1153                 .resources = wm831x_status1_resources,
1154         },
1155         {
1156                 .name = "wm831x-status",
1157                 .id = 2,
1158                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1159                 .resources = wm831x_status2_resources,
1160         },
1161         {
1162                 .name = "wm831x-watchdog",
1163                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1164                 .resources = wm831x_wdt_resources,
1165         },
1166 };
1167
1168 static const struct mfd_cell wm8311_devs[] = {
1169         {
1170                 .name = "wm831x-backup",
1171         },
1172         {
1173                 .name = "wm831x-buckv",
1174                 .id = 1,
1175                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1176                 .resources = wm831x_dcdc1_resources,
1177         },
1178         {
1179                 .name = "wm831x-buckv",
1180                 .id = 2,
1181                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1182                 .resources = wm831x_dcdc2_resources,
1183         },
1184         {
1185                 .name = "wm831x-buckp",
1186                 .id = 3,
1187                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1188                 .resources = wm831x_dcdc3_resources,
1189         },
1190         {
1191                 .name = "wm831x-boostp",
1192                 .id = 4,
1193                 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1194                 .resources = wm831x_dcdc4_resources,
1195         },
1196         {
1197                 .name = "wm831x-clk",
1198         },
1199         {
1200                 .name = "wm831x-epe",
1201                 .id = 1,
1202         },
1203         {
1204                 .name = "wm831x-epe",
1205                 .id = 2,
1206         },
1207         {
1208                 .name = "wm831x-gpio",
1209                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1210                 .resources = wm831x_gpio_resources,
1211         },
1212         {
1213                 .name = "wm831x-hwmon",
1214         },
1215         {
1216                 .name = "wm831x-isink",
1217                 .id = 1,
1218                 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1219                 .resources = wm831x_isink1_resources,
1220         },
1221         {
1222                 .name = "wm831x-isink",
1223                 .id = 2,
1224                 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1225                 .resources = wm831x_isink2_resources,
1226         },
1227         {
1228                 .name = "wm831x-ldo",
1229                 .id = 1,
1230                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1231                 .resources = wm831x_ldo1_resources,
1232         },
1233         {
1234                 .name = "wm831x-ldo",
1235                 .id = 2,
1236                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1237                 .resources = wm831x_ldo2_resources,
1238         },
1239         {
1240                 .name = "wm831x-ldo",
1241                 .id = 3,
1242                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1243                 .resources = wm831x_ldo3_resources,
1244         },
1245         {
1246                 .name = "wm831x-ldo",
1247                 .id = 4,
1248                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1249                 .resources = wm831x_ldo4_resources,
1250         },
1251         {
1252                 .name = "wm831x-ldo",
1253                 .id = 5,
1254                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1255                 .resources = wm831x_ldo5_resources,
1256         },
1257         {
1258                 .name = "wm831x-aldo",
1259                 .id = 7,
1260                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1261                 .resources = wm831x_ldo7_resources,
1262         },
1263         {
1264                 .name = "wm831x-alive-ldo",
1265                 .id = 11,
1266                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1267                 .resources = wm831x_ldo11_resources,
1268         },
1269         {
1270                 .name = "wm831x-on",
1271                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1272                 .resources = wm831x_on_resources,
1273         },
1274         {
1275                 .name = "wm831x-power",
1276                 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1277                 .resources = wm831x_power_resources,
1278         },
1279         {
1280                 .name = "wm831x-status",
1281                 .id = 1,
1282                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1283                 .resources = wm831x_status1_resources,
1284         },
1285         {
1286                 .name = "wm831x-status",
1287                 .id = 2,
1288                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1289                 .resources = wm831x_status2_resources,
1290         },
1291         {
1292                 .name = "wm831x-watchdog",
1293                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1294                 .resources = wm831x_wdt_resources,
1295         },
1296 };
1297
1298 static const struct mfd_cell wm8312_devs[] = {
1299         {
1300                 .name = "wm831x-backup",
1301         },
1302         {
1303                 .name = "wm831x-buckv",
1304                 .id = 1,
1305                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1306                 .resources = wm831x_dcdc1_resources,
1307         },
1308         {
1309                 .name = "wm831x-buckv",
1310                 .id = 2,
1311                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1312                 .resources = wm831x_dcdc2_resources,
1313         },
1314         {
1315                 .name = "wm831x-buckp",
1316                 .id = 3,
1317                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1318                 .resources = wm831x_dcdc3_resources,
1319         },
1320         {
1321                 .name = "wm831x-boostp",
1322                 .id = 4,
1323                 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1324                 .resources = wm831x_dcdc4_resources,
1325         },
1326         {
1327                 .name = "wm831x-clk",
1328         },
1329         {
1330                 .name = "wm831x-epe",
1331                 .id = 1,
1332         },
1333         {
1334                 .name = "wm831x-epe",
1335                 .id = 2,
1336         },
1337         {
1338                 .name = "wm831x-gpio",
1339                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1340                 .resources = wm831x_gpio_resources,
1341         },
1342         {
1343                 .name = "wm831x-hwmon",
1344         },
1345         {
1346                 .name = "wm831x-isink",
1347                 .id = 1,
1348                 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1349                 .resources = wm831x_isink1_resources,
1350         },
1351         {
1352                 .name = "wm831x-isink",
1353                 .id = 2,
1354                 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1355                 .resources = wm831x_isink2_resources,
1356         },
1357         {
1358                 .name = "wm831x-ldo",
1359                 .id = 1,
1360                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1361                 .resources = wm831x_ldo1_resources,
1362         },
1363         {
1364                 .name = "wm831x-ldo",
1365                 .id = 2,
1366                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1367                 .resources = wm831x_ldo2_resources,
1368         },
1369         {
1370                 .name = "wm831x-ldo",
1371                 .id = 3,
1372                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1373                 .resources = wm831x_ldo3_resources,
1374         },
1375         {
1376                 .name = "wm831x-ldo",
1377                 .id = 4,
1378                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1379                 .resources = wm831x_ldo4_resources,
1380         },
1381         {
1382                 .name = "wm831x-ldo",
1383                 .id = 5,
1384                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1385                 .resources = wm831x_ldo5_resources,
1386         },
1387         {
1388                 .name = "wm831x-ldo",
1389                 .id = 6,
1390                 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1391                 .resources = wm831x_ldo6_resources,
1392         },
1393         {
1394                 .name = "wm831x-aldo",
1395                 .id = 7,
1396                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1397                 .resources = wm831x_ldo7_resources,
1398         },
1399         {
1400                 .name = "wm831x-aldo",
1401                 .id = 8,
1402                 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1403                 .resources = wm831x_ldo8_resources,
1404         },
1405         {
1406                 .name = "wm831x-aldo",
1407                 .id = 9,
1408                 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1409                 .resources = wm831x_ldo9_resources,
1410         },
1411         {
1412                 .name = "wm831x-aldo",
1413                 .id = 10,
1414                 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1415                 .resources = wm831x_ldo10_resources,
1416         },
1417         {
1418                 .name = "wm831x-alive-ldo",
1419                 .id = 11,
1420                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1421                 .resources = wm831x_ldo11_resources,
1422         },
1423         {
1424                 .name = "wm831x-on",
1425                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1426                 .resources = wm831x_on_resources,
1427         },
1428         {
1429                 .name = "wm831x-power",
1430                 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1431                 .resources = wm831x_power_resources,
1432         },
1433         {
1434                 .name = "wm831x-status",
1435                 .id = 1,
1436                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1437                 .resources = wm831x_status1_resources,
1438         },
1439         {
1440                 .name = "wm831x-status",
1441                 .id = 2,
1442                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1443                 .resources = wm831x_status2_resources,
1444         },
1445         {
1446                 .name = "wm831x-watchdog",
1447                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1448                 .resources = wm831x_wdt_resources,
1449         },
1450 };
1451
1452 static const struct mfd_cell wm8320_devs[] = {
1453         {
1454                 .name = "wm831x-backup",
1455         },
1456         {
1457                 .name = "wm831x-buckv",
1458                 .id = 1,
1459                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1460                 .resources = wm831x_dcdc1_resources,
1461         },
1462         {
1463                 .name = "wm831x-buckv",
1464                 .id = 2,
1465                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1466                 .resources = wm831x_dcdc2_resources,
1467         },
1468         {
1469                 .name = "wm831x-buckp",
1470                 .id = 3,
1471                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1472                 .resources = wm831x_dcdc3_resources,
1473         },
1474         {
1475                 .name = "wm831x-buckp",
1476                 .id = 4,
1477                 .num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
1478                 .resources = wm8320_dcdc4_buck_resources,
1479         },
1480         {
1481                 .name = "wm831x-clk",
1482         },
1483         {
1484                 .name = "wm831x-gpio",
1485                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1486                 .resources = wm831x_gpio_resources,
1487         },
1488         {
1489                 .name = "wm831x-hwmon",
1490         },
1491         {
1492                 .name = "wm831x-ldo",
1493                 .id = 1,
1494                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1495                 .resources = wm831x_ldo1_resources,
1496         },
1497         {
1498                 .name = "wm831x-ldo",
1499                 .id = 2,
1500                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1501                 .resources = wm831x_ldo2_resources,
1502         },
1503         {
1504                 .name = "wm831x-ldo",
1505                 .id = 3,
1506                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1507                 .resources = wm831x_ldo3_resources,
1508         },
1509         {
1510                 .name = "wm831x-ldo",
1511                 .id = 4,
1512                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1513                 .resources = wm831x_ldo4_resources,
1514         },
1515         {
1516                 .name = "wm831x-ldo",
1517                 .id = 5,
1518                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1519                 .resources = wm831x_ldo5_resources,
1520         },
1521         {
1522                 .name = "wm831x-ldo",
1523                 .id = 6,
1524                 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1525                 .resources = wm831x_ldo6_resources,
1526         },
1527         {
1528                 .name = "wm831x-aldo",
1529                 .id = 7,
1530                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1531                 .resources = wm831x_ldo7_resources,
1532         },
1533         {
1534                 .name = "wm831x-aldo",
1535                 .id = 8,
1536                 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1537                 .resources = wm831x_ldo8_resources,
1538         },
1539         {
1540                 .name = "wm831x-aldo",
1541                 .id = 9,
1542                 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1543                 .resources = wm831x_ldo9_resources,
1544         },
1545         {
1546                 .name = "wm831x-aldo",
1547                 .id = 10,
1548                 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1549                 .resources = wm831x_ldo10_resources,
1550         },
1551         {
1552                 .name = "wm831x-alive-ldo",
1553                 .id = 11,
1554                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1555                 .resources = wm831x_ldo11_resources,
1556         },
1557         {
1558                 .name = "wm831x-on",
1559                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1560                 .resources = wm831x_on_resources,
1561         },
1562         {
1563                 .name = "wm831x-status",
1564                 .id = 1,
1565                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1566                 .resources = wm831x_status1_resources,
1567         },
1568         {
1569                 .name = "wm831x-status",
1570                 .id = 2,
1571                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1572                 .resources = wm831x_status2_resources,
1573         },
1574         {
1575                 .name = "wm831x-watchdog",
1576                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1577                 .resources = wm831x_wdt_resources,
1578         },
1579 };
1580
1581 static const struct mfd_cell touch_devs[] = {
1582         {
1583                 .name = "wm831x-touch",
1584                 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1585                 .resources = wm831x_touch_resources,
1586         },
1587 };
1588
1589 static const struct mfd_cell rtc_devs[] = {
1590         {
1591                 .name = "wm831x-rtc",
1592                 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1593                 .resources = wm831x_rtc_resources,
1594         },
1595 };
1596
1597 static const struct mfd_cell backlight_devs[] = {
1598         {
1599                 .name = "wm831x-backlight",
1600         },
1601 };
1602
1603 struct regmap_config wm831x_regmap_config = {
1604         .reg_bits = 16,
1605         .val_bits = 16,
1606
1607         .cache_type = REGCACHE_RBTREE,
1608
1609         .max_register = WM831X_DBE_CHECK_DATA,
1610         .readable_reg = wm831x_reg_readable,
1611         .writeable_reg = wm831x_reg_writeable,
1612         .volatile_reg = wm831x_reg_volatile,
1613 };
1614 EXPORT_SYMBOL_GPL(wm831x_regmap_config);
1615
1616 /*
1617  * Instantiate the generic non-control parts of the device.
1618  */
1619 int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
1620 {
1621         struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
1622         int rev, wm831x_num;
1623         enum wm831x_parent parent;
1624         int ret, i;
1625
1626         mutex_init(&wm831x->io_lock);
1627         mutex_init(&wm831x->key_lock);
1628         dev_set_drvdata(wm831x->dev, wm831x);
1629         wm831x->soft_shutdown = pdata->soft_shutdown;
1630
1631         ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1632         if (ret < 0) {
1633                 dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1634                 goto err;
1635         }
1636         switch (ret) {
1637         case 0x6204:
1638         case 0x6246:
1639                 break;
1640         default:
1641                 dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1642                 ret = -EINVAL;
1643                 goto err;
1644         }
1645
1646         ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1647         if (ret < 0) {
1648                 dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1649                 goto err;
1650         }
1651         rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1652
1653         ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1654         if (ret < 0) {
1655                 dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1656                 goto err;
1657         }
1658
1659         /* Some engineering samples do not have the ID set, rely on
1660          * the device being registered correctly.
1661          */
1662         if (ret == 0) {
1663                 dev_info(wm831x->dev, "Device is an engineering sample\n");
1664                 ret = id;
1665         }
1666
1667         switch (ret) {
1668         case WM8310:
1669                 parent = WM8310;
1670                 wm831x->num_gpio = 16;
1671                 wm831x->charger_irq_wake = 1;
1672                 if (rev > 0) {
1673                         wm831x->has_gpio_ena = 1;
1674                         wm831x->has_cs_sts = 1;
1675                 }
1676
1677                 dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
1678                 break;
1679
1680         case WM8311:
1681                 parent = WM8311;
1682                 wm831x->num_gpio = 16;
1683                 wm831x->charger_irq_wake = 1;
1684                 if (rev > 0) {
1685                         wm831x->has_gpio_ena = 1;
1686                         wm831x->has_cs_sts = 1;
1687                 }
1688
1689                 dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
1690                 break;
1691
1692         case WM8312:
1693                 parent = WM8312;
1694                 wm831x->num_gpio = 16;
1695                 wm831x->charger_irq_wake = 1;
1696                 if (rev > 0) {
1697                         wm831x->has_gpio_ena = 1;
1698                         wm831x->has_cs_sts = 1;
1699                 }
1700
1701                 dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
1702                 break;
1703
1704         case WM8320:
1705                 parent = WM8320;
1706                 wm831x->num_gpio = 12;
1707                 dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);
1708                 break;
1709
1710         case WM8321:
1711                 parent = WM8321;
1712                 wm831x->num_gpio = 12;
1713                 dev_info(wm831x->dev, "WM8321 revision %c\n", 'A' + rev);
1714                 break;
1715
1716         case WM8325:
1717                 parent = WM8325;
1718                 wm831x->num_gpio = 12;
1719                 dev_info(wm831x->dev, "WM8325 revision %c\n", 'A' + rev);
1720                 break;
1721
1722         case WM8326:
1723                 parent = WM8326;
1724                 wm831x->num_gpio = 12;
1725                 dev_info(wm831x->dev, "WM8326 revision %c\n", 'A' + rev);
1726                 break;
1727
1728         default:
1729                 dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1730                 ret = -EINVAL;
1731                 goto err;
1732         }
1733
1734         /* This will need revisiting in future but is OK for all
1735          * current parts.
1736          */
1737         if (parent != id)
1738                 dev_warn(wm831x->dev, "Device was registered as a WM%lx\n",
1739                          id);
1740
1741         /* Bootstrap the user key */
1742         ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1743         if (ret < 0) {
1744                 dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1745                 goto err;
1746         }
1747         if (ret != 0) {
1748                 dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1749                          ret);
1750                 wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1751         }
1752         wm831x->locked = 1;
1753
1754         if (pdata && pdata->pre_init) {
1755                 ret = pdata->pre_init(wm831x);
1756                 if (ret != 0) {
1757                         dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1758                         goto err;
1759                 }
1760         }
1761
1762         if (pdata) {
1763                 for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
1764                         if (!pdata->gpio_defaults[i])
1765                                 continue;
1766
1767                         wm831x_reg_write(wm831x,
1768                                          WM831X_GPIO1_CONTROL + i,
1769                                          pdata->gpio_defaults[i] & 0xffff);
1770                 }
1771         }
1772
1773         /* Multiply by 10 as we have many subdevices of the same type */
1774         if (pdata && pdata->wm831x_num)
1775                 wm831x_num = pdata->wm831x_num * 10;
1776         else
1777                 wm831x_num = -1;
1778
1779         ret = wm831x_irq_init(wm831x, irq);
1780         if (ret != 0)
1781                 goto err;
1782
1783         wm831x_auxadc_init(wm831x);
1784
1785         /* The core device is up, instantiate the subdevices. */
1786         switch (parent) {
1787         case WM8310:
1788                 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1789                                       wm8310_devs, ARRAY_SIZE(wm8310_devs),
1790                                       NULL, 0, NULL);
1791                 break;
1792
1793         case WM8311:
1794                 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1795                                       wm8311_devs, ARRAY_SIZE(wm8311_devs),
1796                                       NULL, 0, NULL);
1797                 if (!pdata || !pdata->disable_touch)
1798                         mfd_add_devices(wm831x->dev, wm831x_num,
1799                                         touch_devs, ARRAY_SIZE(touch_devs),
1800                                         NULL, 0, NULL);
1801                 break;
1802
1803         case WM8312:
1804                 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1805                                       wm8312_devs, ARRAY_SIZE(wm8312_devs),
1806                                       NULL, 0, NULL);
1807                 if (!pdata || !pdata->disable_touch)
1808                         mfd_add_devices(wm831x->dev, wm831x_num,
1809                                         touch_devs, ARRAY_SIZE(touch_devs),
1810                                         NULL, 0, NULL);
1811                 break;
1812
1813         case WM8320:
1814         case WM8321:
1815         case WM8325:
1816         case WM8326:
1817                 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1818                                       wm8320_devs, ARRAY_SIZE(wm8320_devs),
1819                                       NULL, 0, NULL);
1820                 break;
1821
1822         default:
1823                 /* If this happens the bus probe function is buggy */
1824                 BUG();
1825         }
1826
1827         if (ret != 0) {
1828                 dev_err(wm831x->dev, "Failed to add children\n");
1829                 goto err_irq;
1830         }
1831
1832         /* The RTC can only be used if the 32.768kHz crystal is
1833          * enabled; this can't be controlled by software at runtime.
1834          */
1835         ret = wm831x_reg_read(wm831x, WM831X_CLOCK_CONTROL_2);
1836         if (ret < 0) {
1837                 dev_err(wm831x->dev, "Failed to read clock status: %d\n", ret);
1838                 goto err_irq;
1839         }
1840
1841         if (ret & WM831X_XTAL_ENA) {
1842                 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1843                                       rtc_devs, ARRAY_SIZE(rtc_devs),
1844                                       NULL, 0, NULL);
1845                 if (ret != 0) {
1846                         dev_err(wm831x->dev, "Failed to add RTC: %d\n", ret);
1847                         goto err_irq;
1848                 }
1849         } else {
1850                 dev_info(wm831x->dev, "32.768kHz clock disabled, no RTC\n");
1851         }
1852
1853         if (pdata && pdata->backlight) {
1854                 /* Treat errors as non-critical */
1855                 ret = mfd_add_devices(wm831x->dev, wm831x_num, backlight_devs,
1856                                       ARRAY_SIZE(backlight_devs), NULL,
1857                                       0, NULL);
1858                 if (ret < 0)
1859                         dev_err(wm831x->dev, "Failed to add backlight: %d\n",
1860                                 ret);
1861         }
1862
1863         wm831x_otp_init(wm831x);
1864
1865         if (pdata && pdata->post_init) {
1866                 ret = pdata->post_init(wm831x);
1867                 if (ret != 0) {
1868                         dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1869                         goto err_irq;
1870                 }
1871         }
1872
1873         return 0;
1874
1875 err_irq:
1876         wm831x_irq_exit(wm831x);
1877 err:
1878         mfd_remove_devices(wm831x->dev);
1879         return ret;
1880 }
1881
1882 void wm831x_device_exit(struct wm831x *wm831x)
1883 {
1884         wm831x_otp_exit(wm831x);
1885         mfd_remove_devices(wm831x->dev);
1886         free_irq(wm831x_irq(wm831x, WM831X_IRQ_AUXADC_DATA), wm831x);
1887         wm831x_irq_exit(wm831x);
1888 }
1889
1890 int wm831x_device_suspend(struct wm831x *wm831x)
1891 {
1892         int reg, mask;
1893
1894         /* If the charger IRQs are a wake source then make sure we ack
1895          * them even if they're not actively being used (eg, no power
1896          * driver or no IRQ line wired up) then acknowledge the
1897          * interrupts otherwise suspend won't last very long.
1898          */
1899         if (wm831x->charger_irq_wake) {
1900                 reg = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_2_MASK);
1901
1902                 mask = WM831X_CHG_BATT_HOT_EINT |
1903                         WM831X_CHG_BATT_COLD_EINT |
1904                         WM831X_CHG_BATT_FAIL_EINT |
1905                         WM831X_CHG_OV_EINT | WM831X_CHG_END_EINT |
1906                         WM831X_CHG_TO_EINT | WM831X_CHG_MODE_EINT |
1907                         WM831X_CHG_START_EINT;
1908
1909                 /* If any of the interrupts are masked read the statuses */
1910                 if (reg & mask)
1911                         reg = wm831x_reg_read(wm831x,
1912                                               WM831X_INTERRUPT_STATUS_2);
1913
1914                 if (reg & mask) {
1915                         dev_info(wm831x->dev,
1916                                  "Acknowledging masked charger IRQs: %x\n",
1917                                  reg & mask);
1918                         wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_2,
1919                                          reg & mask);
1920                 }
1921         }
1922
1923         return 0;
1924 }
1925
1926 void wm831x_device_shutdown(struct wm831x *wm831x)
1927 {
1928         if (wm831x->soft_shutdown) {
1929                 dev_info(wm831x->dev, "Initiating shutdown...\n");
1930                 wm831x_set_bits(wm831x, WM831X_POWER_STATE, WM831X_CHIP_ON, 0);
1931         }
1932 }
1933 EXPORT_SYMBOL_GPL(wm831x_device_shutdown);
1934
1935 MODULE_DESCRIPTION("Core support for the WM831X AudioPlus PMIC");
1936 MODULE_LICENSE("GPL");
1937 MODULE_AUTHOR("Mark Brown");