drivers/mfd/wm831x-core.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * wm831x-core.c  --  Device access for Wolfson WM831x PMICs
   4  *
   5  * Copyright 2009 Wolfson Microelectronics PLC.
   6  *
   7  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/export.h>
  13 #include <linux/bcd.h>
  14 #include <linux/delay.h>
  15 #include <linux/mfd/core.h>
  16 #include <linux/slab.h>
  17 #include <linux/err.h>
  18 #include <linux/of.h>
  19 #include <linux/of_device.h>
  20
  21 #include <linux/mfd/wm831x/core.h>
  22 #include <linux/mfd/wm831x/pdata.h>
  23 #include <linux/mfd/wm831x/irq.h>
  24 #include <linux/mfd/wm831x/auxadc.h>
  25 #include <linux/mfd/wm831x/otp.h>
  26 #include <linux/mfd/wm831x/pmu.h>
  27 #include <linux/mfd/wm831x/regulator.h>
  28
  29 /* Current settings - values are 2*2^(reg_val/4) microamps.  These are
  30  * exported since they are used by multiple drivers.
  31  */
  32 const unsigned int wm831x_isinkv_values[WM831X_ISINK_MAX_ISEL + 1] = {
  33         2,
  34         2,
  35         3,
  36         3,
  37         4,
  38         5,
  39         6,
  40         7,
  41         8,
  42         10,
  43         11,
  44         13,
  45         16,
  46         19,
  47         23,
  48         27,
  49         32,
  50         38,
  51         45,
  52         54,
  53         64,
  54         76,
  55         91,
  56         108,
  57         128,
  58         152,
  59         181,
  60         215,
  61         256,
  62         304,
  63         362,
  64         431,
  65         512,
  66         609,
  67         724,
  68         861,
  69         1024,
  70         1218,
  71         1448,
  72         1722,
  73         2048,
  74         2435,
  75         2896,
  76         3444,
  77         4096,
  78         4871,
  79         5793,
  80         6889,
  81         8192,
  82         9742,
  83         11585,
  84         13777,
  85         16384,
  86         19484,
  87         23170,
  88         27554,
  89 };
  90 EXPORT_SYMBOL_GPL(wm831x_isinkv_values);
  91
  92 static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg)
  93 {
  94         if (!wm831x->locked)
  95                 return 0;
  96
  97         switch (reg) {
  98         case WM831X_WATCHDOG:
  99         case WM831X_DC4_CONTROL:
 100         case WM831X_ON_PIN_CONTROL:
 101         case WM831X_BACKUP_CHARGER_CONTROL:
 102         case WM831X_CHARGER_CONTROL_1:
 103         case WM831X_CHARGER_CONTROL_2:
 104                 return 1;
 105
 106         default:
 107                 return 0;
 108         }
 109 }
 110
 111 /**
 112  * wm831x_reg_unlock: Unlock user keyed registers
 113  *
 114  * The WM831x has a user key preventing writes to particularly
 115  * critical registers.  This function locks those registers,
 116  * allowing writes to them.
 117  *
 118  * @wm831x: pointer to local driver data structure
 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  * @wm831x: pointer to local driver data structure
 147  */
 148 int wm831x_reg_unlock(struct wm831x *wm831x)
 149 {
 150         int ret;
 151
 152         /* 0x9716 is the value required to unlock the registers */
 153         ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716);
 154         if (ret == 0) {
 155                 dev_vdbg(wm831x->dev, "Registers unlocked\n");
 156
 157                 mutex_lock(&wm831x->io_lock);
 158                 WARN_ON(!wm831x->locked);
 159                 wm831x->locked = 0;
 160                 mutex_unlock(&wm831x->io_lock);
 161         }
 162
 163         return ret;
 164 }
 165 EXPORT_SYMBOL_GPL(wm831x_reg_unlock);
 166
 167 static bool wm831x_reg_readable(struct device *dev, unsigned int reg)
 168 {
 169         switch (reg) {
 170         case WM831X_RESET_ID:
 171         case WM831X_REVISION:
 172         case WM831X_PARENT_ID:
 173         case WM831X_SYSVDD_CONTROL:
 174         case WM831X_THERMAL_MONITORING:
 175         case WM831X_POWER_STATE:
 176         case WM831X_WATCHDOG:
 177         case WM831X_ON_PIN_CONTROL:
 178         case WM831X_RESET_CONTROL:
 179         case WM831X_CONTROL_INTERFACE:
 180         case WM831X_SECURITY_KEY:
 181         case WM831X_SOFTWARE_SCRATCH:
 182         case WM831X_OTP_CONTROL:
 183         case WM831X_GPIO_LEVEL:
 184         case WM831X_SYSTEM_STATUS:
 185         case WM831X_ON_SOURCE:
 186         case WM831X_OFF_SOURCE:
 187         case WM831X_SYSTEM_INTERRUPTS:
 188         case WM831X_INTERRUPT_STATUS_1:
 189         case WM831X_INTERRUPT_STATUS_2:
 190         case WM831X_INTERRUPT_STATUS_3:
 191         case WM831X_INTERRUPT_STATUS_4:
 192         case WM831X_INTERRUPT_STATUS_5:
 193         case WM831X_IRQ_CONFIG:
 194         case WM831X_SYSTEM_INTERRUPTS_MASK:
 195         case WM831X_INTERRUPT_STATUS_1_MASK:
 196         case WM831X_INTERRUPT_STATUS_2_MASK:
 197         case WM831X_INTERRUPT_STATUS_3_MASK:
 198         case WM831X_INTERRUPT_STATUS_4_MASK:
 199         case WM831X_INTERRUPT_STATUS_5_MASK:
 200         case WM831X_RTC_WRITE_COUNTER:
 201         case WM831X_RTC_TIME_1:
 202         case WM831X_RTC_TIME_2:
 203         case WM831X_RTC_ALARM_1:
 204         case WM831X_RTC_ALARM_2:
 205         case WM831X_RTC_CONTROL:
 206         case WM831X_RTC_TRIM:
 207         case WM831X_TOUCH_CONTROL_1:
 208         case WM831X_TOUCH_CONTROL_2:
 209         case WM831X_TOUCH_DATA_X:
 210         case WM831X_TOUCH_DATA_Y:
 211         case WM831X_TOUCH_DATA_Z:
 212         case WM831X_AUXADC_DATA:
 213         case WM831X_AUXADC_CONTROL:
 214         case WM831X_AUXADC_SOURCE:
 215         case WM831X_COMPARATOR_CONTROL:
 216         case WM831X_COMPARATOR_1:
 217         case WM831X_COMPARATOR_2:
 218         case WM831X_COMPARATOR_3:
 219         case WM831X_COMPARATOR_4:
 220         case WM831X_GPIO1_CONTROL:
 221         case WM831X_GPIO2_CONTROL:
 222         case WM831X_GPIO3_CONTROL:
 223         case WM831X_GPIO4_CONTROL:
 224         case WM831X_GPIO5_CONTROL:
 225         case WM831X_GPIO6_CONTROL:
 226         case WM831X_GPIO7_CONTROL:
 227         case WM831X_GPIO8_CONTROL:
 228         case WM831X_GPIO9_CONTROL:
 229         case WM831X_GPIO10_CONTROL:
 230         case WM831X_GPIO11_CONTROL:
 231         case WM831X_GPIO12_CONTROL:
 232         case WM831X_GPIO13_CONTROL:
 233         case WM831X_GPIO14_CONTROL:
 234         case WM831X_GPIO15_CONTROL:
 235         case WM831X_GPIO16_CONTROL:
 236         case WM831X_CHARGER_CONTROL_1:
 237         case WM831X_CHARGER_CONTROL_2:
 238         case WM831X_CHARGER_STATUS:
 239         case WM831X_BACKUP_CHARGER_CONTROL:
 240         case WM831X_STATUS_LED_1:
 241         case WM831X_STATUS_LED_2:
 242         case WM831X_CURRENT_SINK_1:
 243         case WM831X_CURRENT_SINK_2:
 244         case WM831X_DCDC_ENABLE:
 245         case WM831X_LDO_ENABLE:
 246         case WM831X_DCDC_STATUS:
 247         case WM831X_LDO_STATUS:
 248         case WM831X_DCDC_UV_STATUS:
 249         case WM831X_LDO_UV_STATUS:
 250         case WM831X_DC1_CONTROL_1:
 251         case WM831X_DC1_CONTROL_2:
 252         case WM831X_DC1_ON_CONFIG:
 253         case WM831X_DC1_SLEEP_CONTROL:
 254         case WM831X_DC1_DVS_CONTROL:
 255         case WM831X_DC2_CONTROL_1:
 256         case WM831X_DC2_CONTROL_2:
 257         case WM831X_DC2_ON_CONFIG:
 258         case WM831X_DC2_SLEEP_CONTROL:
 259         case WM831X_DC2_DVS_CONTROL:
 260         case WM831X_DC3_CONTROL_1:
 261         case WM831X_DC3_CONTROL_2:
 262         case WM831X_DC3_ON_CONFIG:
 263         case WM831X_DC3_SLEEP_CONTROL:
 264         case WM831X_DC4_CONTROL:
 265         case WM831X_DC4_SLEEP_CONTROL:
 266         case WM831X_EPE1_CONTROL:
 267         case WM831X_EPE2_CONTROL:
 268         case WM831X_LDO1_CONTROL:
 269         case WM831X_LDO1_ON_CONTROL:
 270         case WM831X_LDO1_SLEEP_CONTROL:
 271         case WM831X_LDO2_CONTROL:
 272         case WM831X_LDO2_ON_CONTROL:
 273         case WM831X_LDO2_SLEEP_CONTROL:
 274         case WM831X_LDO3_CONTROL:
 275         case WM831X_LDO3_ON_CONTROL:
 276         case WM831X_LDO3_SLEEP_CONTROL:
 277         case WM831X_LDO4_CONTROL:
 278         case WM831X_LDO4_ON_CONTROL:
 279         case WM831X_LDO4_SLEEP_CONTROL:
 280         case WM831X_LDO5_CONTROL:
 281         case WM831X_LDO5_ON_CONTROL:
 282         case WM831X_LDO5_SLEEP_CONTROL:
 283         case WM831X_LDO6_CONTROL:
 284         case WM831X_LDO6_ON_CONTROL:
 285         case WM831X_LDO6_SLEEP_CONTROL:
 286         case WM831X_LDO7_CONTROL:
 287         case WM831X_LDO7_ON_CONTROL:
 288         case WM831X_LDO7_SLEEP_CONTROL:
 289         case WM831X_LDO8_CONTROL:
 290         case WM831X_LDO8_ON_CONTROL:
 291         case WM831X_LDO8_SLEEP_CONTROL:
 292         case WM831X_LDO9_CONTROL:
 293         case WM831X_LDO9_ON_CONTROL:
 294         case WM831X_LDO9_SLEEP_CONTROL:
 295         case WM831X_LDO10_CONTROL:
 296         case WM831X_LDO10_ON_CONTROL:
 297         case WM831X_LDO10_SLEEP_CONTROL:
 298         case WM831X_LDO11_ON_CONTROL:
 299         case WM831X_LDO11_SLEEP_CONTROL:
 300         case WM831X_POWER_GOOD_SOURCE_1:
 301         case WM831X_POWER_GOOD_SOURCE_2:
 302         case WM831X_CLOCK_CONTROL_1:
 303         case WM831X_CLOCK_CONTROL_2:
 304         case WM831X_FLL_CONTROL_1:
 305         case WM831X_FLL_CONTROL_2:
 306         case WM831X_FLL_CONTROL_3:
 307         case WM831X_FLL_CONTROL_4:
 308         case WM831X_FLL_CONTROL_5:
 309         case WM831X_UNIQUE_ID_1:
 310         case WM831X_UNIQUE_ID_2:
 311         case WM831X_UNIQUE_ID_3:
 312         case WM831X_UNIQUE_ID_4:
 313         case WM831X_UNIQUE_ID_5:
 314         case WM831X_UNIQUE_ID_6:
 315         case WM831X_UNIQUE_ID_7:
 316         case WM831X_UNIQUE_ID_8:
 317         case WM831X_FACTORY_OTP_ID:
 318         case WM831X_FACTORY_OTP_1:
 319         case WM831X_FACTORY_OTP_2:
 320         case WM831X_FACTORY_OTP_3:
 321         case WM831X_FACTORY_OTP_4:
 322         case WM831X_FACTORY_OTP_5:
 323         case WM831X_CUSTOMER_OTP_ID:
 324         case WM831X_DC1_OTP_CONTROL:
 325         case WM831X_DC2_OTP_CONTROL:
 326         case WM831X_DC3_OTP_CONTROL:
 327         case WM831X_LDO1_2_OTP_CONTROL:
 328         case WM831X_LDO3_4_OTP_CONTROL:
 329         case WM831X_LDO5_6_OTP_CONTROL:
 330         case WM831X_LDO7_8_OTP_CONTROL:
 331         case WM831X_LDO9_10_OTP_CONTROL:
 332         case WM831X_LDO11_EPE_CONTROL:
 333         case WM831X_GPIO1_OTP_CONTROL:
 334         case WM831X_GPIO2_OTP_CONTROL:
 335         case WM831X_GPIO3_OTP_CONTROL:
 336         case WM831X_GPIO4_OTP_CONTROL:
 337         case WM831X_GPIO5_OTP_CONTROL:
 338         case WM831X_GPIO6_OTP_CONTROL:
 339         case WM831X_DBE_CHECK_DATA:
 340                 return true;
 341         default:
 342                 return false;
 343         }
 344 }
 345
 346 static bool wm831x_reg_writeable(struct device *dev, unsigned int reg)
 347 {
 348         struct wm831x *wm831x = dev_get_drvdata(dev);
 349
 350         if (wm831x_reg_locked(wm831x, reg))
 351                 return false;
 352
 353         switch (reg) {
 354         case WM831X_SYSVDD_CONTROL:
 355         case WM831X_THERMAL_MONITORING:
 356         case WM831X_POWER_STATE:
 357         case WM831X_WATCHDOG:
 358         case WM831X_ON_PIN_CONTROL:
 359         case WM831X_RESET_CONTROL:
 360         case WM831X_CONTROL_INTERFACE:
 361         case WM831X_SECURITY_KEY:
 362         case WM831X_SOFTWARE_SCRATCH:
 363         case WM831X_OTP_CONTROL:
 364         case WM831X_GPIO_LEVEL:
 365         case WM831X_INTERRUPT_STATUS_1:
 366         case WM831X_INTERRUPT_STATUS_2:
 367         case WM831X_INTERRUPT_STATUS_3:
 368         case WM831X_INTERRUPT_STATUS_4:
 369         case WM831X_INTERRUPT_STATUS_5:
 370         case WM831X_IRQ_CONFIG:
 371         case WM831X_SYSTEM_INTERRUPTS_MASK:
 372         case WM831X_INTERRUPT_STATUS_1_MASK:
 373         case WM831X_INTERRUPT_STATUS_2_MASK:
 374         case WM831X_INTERRUPT_STATUS_3_MASK:
 375         case WM831X_INTERRUPT_STATUS_4_MASK:
 376         case WM831X_INTERRUPT_STATUS_5_MASK:
 377         case WM831X_RTC_TIME_1:
 378         case WM831X_RTC_TIME_2:
 379         case WM831X_RTC_ALARM_1:
 380         case WM831X_RTC_ALARM_2:
 381         case WM831X_RTC_CONTROL:
 382         case WM831X_RTC_TRIM:
 383         case WM831X_TOUCH_CONTROL_1:
 384         case WM831X_TOUCH_CONTROL_2:
 385         case WM831X_AUXADC_CONTROL:
 386         case WM831X_AUXADC_SOURCE:
 387         case WM831X_COMPARATOR_CONTROL:
 388         case WM831X_COMPARATOR_1:
 389         case WM831X_COMPARATOR_2:
 390         case WM831X_COMPARATOR_3:
 391         case WM831X_COMPARATOR_4:
 392         case WM831X_GPIO1_CONTROL:
 393         case WM831X_GPIO2_CONTROL:
 394         case WM831X_GPIO3_CONTROL:
 395         case WM831X_GPIO4_CONTROL:
 396         case WM831X_GPIO5_CONTROL:
 397         case WM831X_GPIO6_CONTROL:
 398         case WM831X_GPIO7_CONTROL:
 399         case WM831X_GPIO8_CONTROL:
 400         case WM831X_GPIO9_CONTROL:
 401         case WM831X_GPIO10_CONTROL:
 402         case WM831X_GPIO11_CONTROL:
 403         case WM831X_GPIO12_CONTROL:
 404         case WM831X_GPIO13_CONTROL:
 405         case WM831X_GPIO14_CONTROL:
 406         case WM831X_GPIO15_CONTROL:
 407         case WM831X_GPIO16_CONTROL:
 408         case WM831X_CHARGER_CONTROL_1:
 409         case WM831X_CHARGER_CONTROL_2:
 410         case WM831X_CHARGER_STATUS:
 411         case WM831X_BACKUP_CHARGER_CONTROL:
 412         case WM831X_STATUS_LED_1:
 413         case WM831X_STATUS_LED_2:
 414         case WM831X_CURRENT_SINK_1:
 415         case WM831X_CURRENT_SINK_2:
 416         case WM831X_DCDC_ENABLE:
 417         case WM831X_LDO_ENABLE:
 418         case WM831X_DC1_CONTROL_1:
 419         case WM831X_DC1_CONTROL_2:
 420         case WM831X_DC1_ON_CONFIG:
 421         case WM831X_DC1_SLEEP_CONTROL:
 422         case WM831X_DC1_DVS_CONTROL:
 423         case WM831X_DC2_CONTROL_1:
 424         case WM831X_DC2_CONTROL_2:
 425         case WM831X_DC2_ON_CONFIG:
 426         case WM831X_DC2_SLEEP_CONTROL:
 427         case WM831X_DC2_DVS_CONTROL:
 428         case WM831X_DC3_CONTROL_1:
 429         case WM831X_DC3_CONTROL_2:
 430         case WM831X_DC3_ON_CONFIG:
 431         case WM831X_DC3_SLEEP_CONTROL:
 432         case WM831X_DC4_CONTROL:
 433         case WM831X_DC4_SLEEP_CONTROL:
 434         case WM831X_EPE1_CONTROL:
 435         case WM831X_EPE2_CONTROL:
 436         case WM831X_LDO1_CONTROL:
 437         case WM831X_LDO1_ON_CONTROL:
 438         case WM831X_LDO1_SLEEP_CONTROL:
 439         case WM831X_LDO2_CONTROL:
 440         case WM831X_LDO2_ON_CONTROL:
 441         case WM831X_LDO2_SLEEP_CONTROL:
 442         case WM831X_LDO3_CONTROL:
 443         case WM831X_LDO3_ON_CONTROL:
 444         case WM831X_LDO3_SLEEP_CONTROL:
 445         case WM831X_LDO4_CONTROL:
 446         case WM831X_LDO4_ON_CONTROL:
 447         case WM831X_LDO4_SLEEP_CONTROL:
 448         case WM831X_LDO5_CONTROL:
 449         case WM831X_LDO5_ON_CONTROL:
 450         case WM831X_LDO5_SLEEP_CONTROL:
 451         case WM831X_LDO6_CONTROL:
 452         case WM831X_LDO6_ON_CONTROL:
 453         case WM831X_LDO6_SLEEP_CONTROL:
 454         case WM831X_LDO7_CONTROL:
 455         case WM831X_LDO7_ON_CONTROL:
 456         case WM831X_LDO7_SLEEP_CONTROL:
 457         case WM831X_LDO8_CONTROL:
 458         case WM831X_LDO8_ON_CONTROL:
 459         case WM831X_LDO8_SLEEP_CONTROL:
 460         case WM831X_LDO9_CONTROL:
 461         case WM831X_LDO9_ON_CONTROL:
 462         case WM831X_LDO9_SLEEP_CONTROL:
 463         case WM831X_LDO10_CONTROL:
 464         case WM831X_LDO10_ON_CONTROL:
 465         case WM831X_LDO10_SLEEP_CONTROL:
 466         case WM831X_LDO11_ON_CONTROL:
 467         case WM831X_LDO11_SLEEP_CONTROL:
 468         case WM831X_POWER_GOOD_SOURCE_1:
 469         case WM831X_POWER_GOOD_SOURCE_2:
 470         case WM831X_CLOCK_CONTROL_1:
 471         case WM831X_CLOCK_CONTROL_2:
 472         case WM831X_FLL_CONTROL_1:
 473         case WM831X_FLL_CONTROL_2:
 474         case WM831X_FLL_CONTROL_3:
 475         case WM831X_FLL_CONTROL_4:
 476         case WM831X_FLL_CONTROL_5:
 477                 return true;
 478         default:
 479                 return false;
 480         }
 481 }
 482
 483 static bool wm831x_reg_volatile(struct device *dev, unsigned int reg)
 484 {
 485         switch (reg) {
 486         case WM831X_SYSTEM_STATUS:
 487         case WM831X_ON_SOURCE:
 488         case WM831X_OFF_SOURCE:
 489         case WM831X_GPIO_LEVEL:
 490         case WM831X_SYSTEM_INTERRUPTS:
 491         case WM831X_INTERRUPT_STATUS_1:
 492         case WM831X_INTERRUPT_STATUS_2:
 493         case WM831X_INTERRUPT_STATUS_3:
 494         case WM831X_INTERRUPT_STATUS_4:
 495         case WM831X_INTERRUPT_STATUS_5:
 496         case WM831X_RTC_TIME_1:
 497         case WM831X_RTC_TIME_2:
 498         case WM831X_TOUCH_DATA_X:
 499         case WM831X_TOUCH_DATA_Y:
 500         case WM831X_TOUCH_DATA_Z:
 501         case WM831X_AUXADC_DATA:
 502         case WM831X_CHARGER_STATUS:
 503         case WM831X_DCDC_STATUS:
 504         case WM831X_LDO_STATUS:
 505         case WM831X_DCDC_UV_STATUS:
 506         case WM831X_LDO_UV_STATUS:
 507                 return true;
 508         default:
 509                 return false;
 510         }
 511 }
 512
 513 /**
 514  * wm831x_reg_read: Read a single WM831x register.
 515  *
 516  * @wm831x: Device to read from.
 517  * @reg: Register to read.
 518  */
 519 int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
 520 {
 521         unsigned int val;
 522         int ret;
 523
 524         ret = regmap_read(wm831x->regmap, reg, &val);
 525
 526         if (ret < 0)
 527                 return ret;
 528         else
 529                 return val;
 530 }
 531 EXPORT_SYMBOL_GPL(wm831x_reg_read);
 532
 533 /**
 534  * wm831x_bulk_read: Read multiple WM831x registers
 535  *
 536  * @wm831x: Device to read from
 537  * @reg: First register
 538  * @count: Number of registers
 539  * @buf: Buffer to fill.
 540  */
 541 int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
 542                      int count, u16 *buf)
 543 {
 544         return regmap_bulk_read(wm831x->regmap, reg, buf, count);
 545 }
 546 EXPORT_SYMBOL_GPL(wm831x_bulk_read);
 547
 548 static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
 549                         int bytes, void *src)
 550 {
 551         u16 *buf = src;
 552         int i, ret;
 553
 554         BUG_ON(bytes % 2);
 555         BUG_ON(bytes <= 0);
 556
 557         for (i = 0; i < bytes / 2; i++) {
 558                 if (wm831x_reg_locked(wm831x, reg))
 559                         return -EPERM;
 560
 561                 dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
 562                          buf[i], reg + i, reg + i);
 563                 ret = regmap_write(wm831x->regmap, reg + i, buf[i]);
 564                 if (ret != 0)
 565                         return ret;
 566         }
 567
 568         return 0;
 569 }
 570
 571 /**
 572  * wm831x_reg_write: Write a single WM831x register.
 573  *
 574  * @wm831x: Device to write to.
 575  * @reg: Register to write to.
 576  * @val: Value to write.
 577  */
 578 int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg,
 579                      unsigned short val)
 580 {
 581         int ret;
 582
 583         mutex_lock(&wm831x->io_lock);
 584
 585         ret = wm831x_write(wm831x, reg, 2, &val);
 586
 587         mutex_unlock(&wm831x->io_lock);
 588
 589         return ret;
 590 }
 591 EXPORT_SYMBOL_GPL(wm831x_reg_write);
 592
 593 /**
 594  * wm831x_set_bits: Set the value of a bitfield in a WM831x register
 595  *
 596  * @wm831x: Device to write to.
 597  * @reg: Register to write to.
 598  * @mask: Mask of bits to set.
 599  * @val: Value to set (unshifted)
 600  */
 601 int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
 602                     unsigned short mask, unsigned short val)
 603 {
 604         int ret;
 605
 606         mutex_lock(&wm831x->io_lock);
 607
 608         if (!wm831x_reg_locked(wm831x, reg))
 609                 ret = regmap_update_bits(wm831x->regmap, reg, mask, val);
 610         else
 611                 ret = -EPERM;
 612
 613         mutex_unlock(&wm831x->io_lock);
 614
 615         return ret;
 616 }
 617 EXPORT_SYMBOL_GPL(wm831x_set_bits);
 618
 619 static const struct resource wm831x_dcdc1_resources[] = {
 620         {
 621                 .start = WM831X_DC1_CONTROL_1,
 622                 .end   = WM831X_DC1_DVS_CONTROL,
 623                 .flags = IORESOURCE_REG,
 624         },
 625         {
 626                 .name  = "UV",
 627                 .start = WM831X_IRQ_UV_DC1,
 628                 .end   = WM831X_IRQ_UV_DC1,
 629                 .flags = IORESOURCE_IRQ,
 630         },
 631         {
 632                 .name  = "HC",
 633                 .start = WM831X_IRQ_HC_DC1,
 634                 .end   = WM831X_IRQ_HC_DC1,
 635                 .flags = IORESOURCE_IRQ,
 636         },
 637 };
 638
 639
 640 static const struct resource wm831x_dcdc2_resources[] = {
 641         {
 642                 .start = WM831X_DC2_CONTROL_1,
 643                 .end   = WM831X_DC2_DVS_CONTROL,
 644                 .flags = IORESOURCE_REG,
 645         },
 646         {
 647                 .name  = "UV",
 648                 .start = WM831X_IRQ_UV_DC2,
 649                 .end   = WM831X_IRQ_UV_DC2,
 650                 .flags = IORESOURCE_IRQ,
 651         },
 652         {
 653                 .name  = "HC",
 654                 .start = WM831X_IRQ_HC_DC2,
 655                 .end   = WM831X_IRQ_HC_DC2,
 656                 .flags = IORESOURCE_IRQ,
 657         },
 658 };
 659
 660 static const struct resource wm831x_dcdc3_resources[] = {
 661         {
 662                 .start = WM831X_DC3_CONTROL_1,
 663                 .end   = WM831X_DC3_SLEEP_CONTROL,
 664                 .flags = IORESOURCE_REG,
 665         },
 666         {
 667                 .name  = "UV",
 668                 .start = WM831X_IRQ_UV_DC3,
 669                 .end   = WM831X_IRQ_UV_DC3,
 670                 .flags = IORESOURCE_IRQ,
 671         },
 672 };
 673
 674 static const struct resource wm831x_dcdc4_resources[] = {
 675         {
 676                 .start = WM831X_DC4_CONTROL,
 677                 .end   = WM831X_DC4_SLEEP_CONTROL,
 678                 .flags = IORESOURCE_REG,
 679         },
 680         {
 681                 .name  = "UV",
 682                 .start = WM831X_IRQ_UV_DC4,
 683                 .end   = WM831X_IRQ_UV_DC4,
 684                 .flags = IORESOURCE_IRQ,
 685         },
 686 };
 687
 688 static const struct resource wm8320_dcdc4_buck_resources[] = {
 689         {
 690                 .start = WM831X_DC4_CONTROL,
 691                 .end   = WM832X_DC4_SLEEP_CONTROL,
 692                 .flags = IORESOURCE_REG,
 693         },
 694         {
 695                 .name  = "UV",
 696                 .start = WM831X_IRQ_UV_DC4,
 697                 .end   = WM831X_IRQ_UV_DC4,
 698                 .flags = IORESOURCE_IRQ,
 699         },
 700 };
 701
 702 static const struct resource wm831x_gpio_resources[] = {
 703         {
 704                 .start = WM831X_IRQ_GPIO_1,
 705                 .end   = WM831X_IRQ_GPIO_16,
 706                 .flags = IORESOURCE_IRQ,
 707         },
 708 };
 709
 710 static const struct resource wm831x_isink1_resources[] = {
 711         {
 712                 .start = WM831X_CURRENT_SINK_1,
 713                 .end   = WM831X_CURRENT_SINK_1,
 714                 .flags = IORESOURCE_REG,
 715         },
 716         {
 717                 .start = WM831X_IRQ_CS1,
 718                 .end   = WM831X_IRQ_CS1,
 719                 .flags = IORESOURCE_IRQ,
 720         },
 721 };
 722
 723 static const struct resource wm831x_isink2_resources[] = {
 724         {
 725                 .start = WM831X_CURRENT_SINK_2,
 726                 .end   = WM831X_CURRENT_SINK_2,
 727                 .flags = IORESOURCE_REG,
 728         },
 729         {
 730                 .start = WM831X_IRQ_CS2,
 731                 .end   = WM831X_IRQ_CS2,
 732                 .flags = IORESOURCE_IRQ,
 733         },
 734 };
 735
 736 static const struct resource wm831x_ldo1_resources[] = {
 737         {
 738                 .start = WM831X_LDO1_CONTROL,
 739                 .end   = WM831X_LDO1_SLEEP_CONTROL,
 740                 .flags = IORESOURCE_REG,
 741         },
 742         {
 743                 .name  = "UV",
 744                 .start = WM831X_IRQ_UV_LDO1,
 745                 .end   = WM831X_IRQ_UV_LDO1,
 746                 .flags = IORESOURCE_IRQ,
 747         },
 748 };
 749
 750 static const struct resource wm831x_ldo2_resources[] = {
 751         {
 752                 .start = WM831X_LDO2_CONTROL,
 753                 .end   = WM831X_LDO2_SLEEP_CONTROL,
 754                 .flags = IORESOURCE_REG,
 755         },
 756         {
 757                 .name  = "UV",
 758                 .start = WM831X_IRQ_UV_LDO2,
 759                 .end   = WM831X_IRQ_UV_LDO2,
 760                 .flags = IORESOURCE_IRQ,
 761         },
 762 };
 763
 764 static const struct resource wm831x_ldo3_resources[] = {
 765         {
 766                 .start = WM831X_LDO3_CONTROL,
 767                 .end   = WM831X_LDO3_SLEEP_CONTROL,
 768                 .flags = IORESOURCE_REG,
 769         },
 770         {
 771                 .name  = "UV",
 772                 .start = WM831X_IRQ_UV_LDO3,
 773                 .end   = WM831X_IRQ_UV_LDO3,
 774                 .flags = IORESOURCE_IRQ,
 775         },
 776 };
 777
 778 static const struct resource wm831x_ldo4_resources[] = {
 779         {
 780                 .start = WM831X_LDO4_CONTROL,
 781                 .end   = WM831X_LDO4_SLEEP_CONTROL,
 782                 .flags = IORESOURCE_REG,
 783         },
 784         {
 785                 .name  = "UV",
 786                 .start = WM831X_IRQ_UV_LDO4,
 787                 .end   = WM831X_IRQ_UV_LDO4,
 788                 .flags = IORESOURCE_IRQ,
 789         },
 790 };
 791
 792 static const struct resource wm831x_ldo5_resources[] = {
 793         {
 794                 .start = WM831X_LDO5_CONTROL,
 795                 .end   = WM831X_LDO5_SLEEP_CONTROL,
 796                 .flags = IORESOURCE_REG,
 797         },
 798         {
 799                 .name  = "UV",
 800                 .start = WM831X_IRQ_UV_LDO5,
 801                 .end   = WM831X_IRQ_UV_LDO5,
 802                 .flags = IORESOURCE_IRQ,
 803         },
 804 };
 805
 806 static const struct resource wm831x_ldo6_resources[] = {
 807         {
 808                 .start = WM831X_LDO6_CONTROL,
 809                 .end   = WM831X_LDO6_SLEEP_CONTROL,
 810                 .flags = IORESOURCE_REG,
 811         },
 812         {
 813                 .name  = "UV",
 814                 .start = WM831X_IRQ_UV_LDO6,
 815                 .end   = WM831X_IRQ_UV_LDO6,
 816                 .flags = IORESOURCE_IRQ,
 817         },
 818 };
 819
 820 static const struct resource wm831x_ldo7_resources[] = {
 821         {
 822                 .start = WM831X_LDO7_CONTROL,
 823                 .end   = WM831X_LDO7_SLEEP_CONTROL,
 824                 .flags = IORESOURCE_REG,
 825         },
 826         {
 827                 .name  = "UV",
 828                 .start = WM831X_IRQ_UV_LDO7,
 829                 .end   = WM831X_IRQ_UV_LDO7,
 830                 .flags = IORESOURCE_IRQ,
 831         },
 832 };
 833
 834 static const struct resource wm831x_ldo8_resources[] = {
 835         {
 836                 .start = WM831X_LDO8_CONTROL,
 837                 .end   = WM831X_LDO8_SLEEP_CONTROL,
 838                 .flags = IORESOURCE_REG,
 839         },
 840         {
 841                 .name  = "UV",
 842                 .start = WM831X_IRQ_UV_LDO8,
 843                 .end   = WM831X_IRQ_UV_LDO8,
 844                 .flags = IORESOURCE_IRQ,
 845         },
 846 };
 847
 848 static const struct resource wm831x_ldo9_resources[] = {
 849         {
 850                 .start = WM831X_LDO9_CONTROL,
 851                 .end   = WM831X_LDO9_SLEEP_CONTROL,
 852                 .flags = IORESOURCE_REG,
 853         },
 854         {
 855                 .name  = "UV",
 856                 .start = WM831X_IRQ_UV_LDO9,
 857                 .end   = WM831X_IRQ_UV_LDO9,
 858                 .flags = IORESOURCE_IRQ,
 859         },
 860 };
 861
 862 static const struct resource wm831x_ldo10_resources[] = {
 863         {
 864                 .start = WM831X_LDO10_CONTROL,
 865                 .end   = WM831X_LDO10_SLEEP_CONTROL,
 866                 .flags = IORESOURCE_REG,
 867         },
 868         {
 869                 .name  = "UV",
 870                 .start = WM831X_IRQ_UV_LDO10,
 871                 .end   = WM831X_IRQ_UV_LDO10,
 872                 .flags = IORESOURCE_IRQ,
 873         },
 874 };
 875
 876 static const struct resource wm831x_ldo11_resources[] = {
 877         {
 878                 .start = WM831X_LDO11_ON_CONTROL,
 879                 .end   = WM831X_LDO11_SLEEP_CONTROL,
 880                 .flags = IORESOURCE_REG,
 881         },
 882 };
 883
 884 static const struct resource wm831x_on_resources[] = {
 885         {
 886                 .start = WM831X_IRQ_ON,
 887                 .end   = WM831X_IRQ_ON,
 888                 .flags = IORESOURCE_IRQ,
 889         },
 890 };
 891
 892
 893 static const struct resource wm831x_power_resources[] = {
 894         {
 895                 .name = "SYSLO",
 896                 .start = WM831X_IRQ_PPM_SYSLO,
 897                 .end   = WM831X_IRQ_PPM_SYSLO,
 898                 .flags = IORESOURCE_IRQ,
 899         },
 900         {
 901                 .name = "PWR SRC",
 902                 .start = WM831X_IRQ_PPM_PWR_SRC,
 903                 .end   = WM831X_IRQ_PPM_PWR_SRC,
 904                 .flags = IORESOURCE_IRQ,
 905         },
 906         {
 907                 .name = "USB CURR",
 908                 .start = WM831X_IRQ_PPM_USB_CURR,
 909                 .end   = WM831X_IRQ_PPM_USB_CURR,
 910                 .flags = IORESOURCE_IRQ,
 911         },
 912         {
 913                 .name = "BATT HOT",
 914                 .start = WM831X_IRQ_CHG_BATT_HOT,
 915                 .end   = WM831X_IRQ_CHG_BATT_HOT,
 916                 .flags = IORESOURCE_IRQ,
 917         },
 918         {
 919                 .name = "BATT COLD",
 920                 .start = WM831X_IRQ_CHG_BATT_COLD,
 921                 .end   = WM831X_IRQ_CHG_BATT_COLD,
 922                 .flags = IORESOURCE_IRQ,
 923         },
 924         {
 925                 .name = "BATT FAIL",
 926                 .start = WM831X_IRQ_CHG_BATT_FAIL,
 927                 .end   = WM831X_IRQ_CHG_BATT_FAIL,
 928                 .flags = IORESOURCE_IRQ,
 929         },
 930         {
 931                 .name = "OV",
 932                 .start = WM831X_IRQ_CHG_OV,
 933                 .end   = WM831X_IRQ_CHG_OV,
 934                 .flags = IORESOURCE_IRQ,
 935         },
 936         {
 937                 .name = "END",
 938                 .start = WM831X_IRQ_CHG_END,
 939                 .end   = WM831X_IRQ_CHG_END,
 940                 .flags = IORESOURCE_IRQ,
 941         },
 942         {
 943                 .name = "TO",
 944                 .start = WM831X_IRQ_CHG_TO,
 945                 .end   = WM831X_IRQ_CHG_TO,
 946                 .flags = IORESOURCE_IRQ,
 947         },
 948         {
 949                 .name = "MODE",
 950                 .start = WM831X_IRQ_CHG_MODE,
 951                 .end   = WM831X_IRQ_CHG_MODE,
 952                 .flags = IORESOURCE_IRQ,
 953         },
 954         {
 955                 .name = "START",
 956                 .start = WM831X_IRQ_CHG_START,
 957                 .end   = WM831X_IRQ_CHG_START,
 958                 .flags = IORESOURCE_IRQ,
 959         },
 960 };
 961
 962 static const struct resource wm831x_rtc_resources[] = {
 963         {
 964                 .name = "PER",
 965                 .start = WM831X_IRQ_RTC_PER,
 966                 .end   = WM831X_IRQ_RTC_PER,
 967                 .flags = IORESOURCE_IRQ,
 968         },
 969         {
 970                 .name = "ALM",
 971                 .start = WM831X_IRQ_RTC_ALM,
 972                 .end   = WM831X_IRQ_RTC_ALM,
 973                 .flags = IORESOURCE_IRQ,
 974         },
 975 };
 976
 977 static const struct resource wm831x_status1_resources[] = {
 978         {
 979                 .start = WM831X_STATUS_LED_1,
 980                 .end   = WM831X_STATUS_LED_1,
 981                 .flags = IORESOURCE_REG,
 982         },
 983 };
 984
 985 static const struct resource wm831x_status2_resources[] = {
 986         {
 987                 .start = WM831X_STATUS_LED_2,
 988                 .end   = WM831X_STATUS_LED_2,
 989                 .flags = IORESOURCE_REG,
 990         },
 991 };
 992
 993 static const struct resource wm831x_touch_resources[] = {
 994         {
 995                 .name = "TCHPD",
 996                 .start = WM831X_IRQ_TCHPD,
 997                 .end   = WM831X_IRQ_TCHPD,
 998                 .flags = IORESOURCE_IRQ,
 999         },
1000         {
1001                 .name = "TCHDATA",
1002                 .start = WM831X_IRQ_TCHDATA,
1003                 .end   = WM831X_IRQ_TCHDATA,
1004                 .flags = IORESOURCE_IRQ,
1005         },
1006 };
1007
1008 static const struct resource wm831x_wdt_resources[] = {
1009         {
1010                 .start = WM831X_IRQ_WDOG_TO,
1011                 .end   = WM831X_IRQ_WDOG_TO,
1012                 .flags = IORESOURCE_IRQ,
1013         },
1014 };
1015
1016 static const struct mfd_cell wm8310_devs[] = {
1017         {
1018                 .name = "wm831x-backup",
1019         },
1020         {
1021                 .name = "wm831x-buckv",
1022                 .id = 1,
1023                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1024                 .resources = wm831x_dcdc1_resources,
1025         },
1026         {
1027                 .name = "wm831x-buckv",
1028                 .id = 2,
1029                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1030                 .resources = wm831x_dcdc2_resources,
1031         },
1032         {
1033                 .name = "wm831x-buckp",
1034                 .id = 3,
1035                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1036                 .resources = wm831x_dcdc3_resources,
1037         },
1038         {
1039                 .name = "wm831x-boostp",
1040                 .id = 4,
1041                 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1042                 .resources = wm831x_dcdc4_resources,
1043         },
1044         {
1045                 .name = "wm831x-clk",
1046         },
1047         {
1048                 .name = "wm831x-epe",
1049                 .id = 1,
1050         },
1051         {
1052                 .name = "wm831x-epe",
1053                 .id = 2,
1054         },
1055         {
1056                 .name = "wm831x-gpio",
1057                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1058                 .resources = wm831x_gpio_resources,
1059         },
1060         {
1061                 .name = "wm831x-hwmon",
1062         },
1063         {
1064                 .name = "wm831x-isink",
1065                 .id = 1,
1066                 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1067                 .resources = wm831x_isink1_resources,
1068         },
1069         {
1070                 .name = "wm831x-isink",
1071                 .id = 2,
1072                 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1073                 .resources = wm831x_isink2_resources,
1074         },
1075         {
1076                 .name = "wm831x-ldo",
1077                 .id = 1,
1078                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1079                 .resources = wm831x_ldo1_resources,
1080         },
1081         {
1082                 .name = "wm831x-ldo",
1083                 .id = 2,
1084                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1085                 .resources = wm831x_ldo2_resources,
1086         },
1087         {
1088                 .name = "wm831x-ldo",
1089                 .id = 3,
1090                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1091                 .resources = wm831x_ldo3_resources,
1092         },
1093         {
1094                 .name = "wm831x-ldo",
1095                 .id = 4,
1096                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1097                 .resources = wm831x_ldo4_resources,
1098         },
1099         {
1100                 .name = "wm831x-ldo",
1101                 .id = 5,
1102                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1103                 .resources = wm831x_ldo5_resources,
1104         },
1105         {
1106                 .name = "wm831x-ldo",
1107                 .id = 6,
1108                 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1109                 .resources = wm831x_ldo6_resources,
1110         },
1111         {
1112                 .name = "wm831x-aldo",
1113                 .id = 7,
1114                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1115                 .resources = wm831x_ldo7_resources,
1116         },
1117         {
1118                 .name = "wm831x-aldo",
1119                 .id = 8,
1120                 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1121                 .resources = wm831x_ldo8_resources,
1122         },
1123         {
1124                 .name = "wm831x-aldo",
1125                 .id = 9,
1126                 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1127                 .resources = wm831x_ldo9_resources,
1128         },
1129         {
1130                 .name = "wm831x-aldo",
1131                 .id = 10,
1132                 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1133                 .resources = wm831x_ldo10_resources,
1134         },
1135         {
1136                 .name = "wm831x-alive-ldo",
1137                 .id = 11,
1138                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1139                 .resources = wm831x_ldo11_resources,
1140         },
1141         {
1142                 .name = "wm831x-on",
1143                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1144                 .resources = wm831x_on_resources,
1145         },
1146         {
1147                 .name = "wm831x-power",
1148                 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1149                 .resources = wm831x_power_resources,
1150         },
1151         {
1152                 .name = "wm831x-status",
1153                 .id = 1,
1154                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1155                 .resources = wm831x_status1_resources,
1156         },
1157         {
1158                 .name = "wm831x-status",
1159                 .id = 2,
1160                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1161                 .resources = wm831x_status2_resources,
1162         },
1163         {
1164                 .name = "wm831x-watchdog",
1165                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1166                 .resources = wm831x_wdt_resources,
1167         },
1168 };
1169
1170 static const struct mfd_cell wm8311_devs[] = {
1171         {
1172                 .name = "wm831x-backup",
1173         },
1174         {
1175                 .name = "wm831x-buckv",
1176                 .id = 1,
1177                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1178                 .resources = wm831x_dcdc1_resources,
1179         },
1180         {
1181                 .name = "wm831x-buckv",
1182                 .id = 2,
1183                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1184                 .resources = wm831x_dcdc2_resources,
1185         },
1186         {
1187                 .name = "wm831x-buckp",
1188                 .id = 3,
1189                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1190                 .resources = wm831x_dcdc3_resources,
1191         },
1192         {
1193                 .name = "wm831x-boostp",
1194                 .id = 4,
1195                 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1196                 .resources = wm831x_dcdc4_resources,
1197         },
1198         {
1199                 .name = "wm831x-clk",
1200         },
1201         {
1202                 .name = "wm831x-epe",
1203                 .id = 1,
1204         },
1205         {
1206                 .name = "wm831x-epe",
1207                 .id = 2,
1208         },
1209         {
1210                 .name = "wm831x-gpio",
1211                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1212                 .resources = wm831x_gpio_resources,
1213         },
1214         {
1215                 .name = "wm831x-hwmon",
1216         },
1217         {
1218                 .name = "wm831x-isink",
1219                 .id = 1,
1220                 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1221                 .resources = wm831x_isink1_resources,
1222         },
1223         {
1224                 .name = "wm831x-isink",
1225                 .id = 2,
1226                 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1227                 .resources = wm831x_isink2_resources,
1228         },
1229         {
1230                 .name = "wm831x-ldo",
1231                 .id = 1,
1232                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1233                 .resources = wm831x_ldo1_resources,
1234         },
1235         {
1236                 .name = "wm831x-ldo",
1237                 .id = 2,
1238                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1239                 .resources = wm831x_ldo2_resources,
1240         },
1241         {
1242                 .name = "wm831x-ldo",
1243                 .id = 3,
1244                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1245                 .resources = wm831x_ldo3_resources,
1246         },
1247         {
1248                 .name = "wm831x-ldo",
1249                 .id = 4,
1250                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1251                 .resources = wm831x_ldo4_resources,
1252         },
1253         {
1254                 .name = "wm831x-ldo",
1255                 .id = 5,
1256                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1257                 .resources = wm831x_ldo5_resources,
1258         },
1259         {
1260                 .name = "wm831x-aldo",
1261                 .id = 7,
1262                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1263                 .resources = wm831x_ldo7_resources,
1264         },
1265         {
1266                 .name = "wm831x-alive-ldo",
1267                 .id = 11,
1268                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1269                 .resources = wm831x_ldo11_resources,
1270         },
1271         {
1272                 .name = "wm831x-on",
1273                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1274                 .resources = wm831x_on_resources,
1275         },
1276         {
1277                 .name = "wm831x-power",
1278                 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1279                 .resources = wm831x_power_resources,
1280         },
1281         {
1282                 .name = "wm831x-status",
1283                 .id = 1,
1284                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1285                 .resources = wm831x_status1_resources,
1286         },
1287         {
1288                 .name = "wm831x-status",
1289                 .id = 2,
1290                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1291                 .resources = wm831x_status2_resources,
1292         },
1293         {
1294                 .name = "wm831x-watchdog",
1295                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1296                 .resources = wm831x_wdt_resources,
1297         },
1298 };
1299
1300 static const struct mfd_cell wm8312_devs[] = {
1301         {
1302                 .name = "wm831x-backup",
1303         },
1304         {
1305                 .name = "wm831x-buckv",
1306                 .id = 1,
1307                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1308                 .resources = wm831x_dcdc1_resources,
1309         },
1310         {
1311                 .name = "wm831x-buckv",
1312                 .id = 2,
1313                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1314                 .resources = wm831x_dcdc2_resources,
1315         },
1316         {
1317                 .name = "wm831x-buckp",
1318                 .id = 3,
1319                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1320                 .resources = wm831x_dcdc3_resources,
1321         },
1322         {
1323                 .name = "wm831x-boostp",
1324                 .id = 4,
1325                 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1326                 .resources = wm831x_dcdc4_resources,
1327         },
1328         {
1329                 .name = "wm831x-clk",
1330         },
1331         {
1332                 .name = "wm831x-epe",
1333                 .id = 1,
1334         },
1335         {
1336                 .name = "wm831x-epe",
1337                 .id = 2,
1338         },
1339         {
1340                 .name = "wm831x-gpio",
1341                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1342                 .resources = wm831x_gpio_resources,
1343         },
1344         {
1345                 .name = "wm831x-hwmon",
1346         },
1347         {
1348                 .name = "wm831x-isink",
1349                 .id = 1,
1350                 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1351                 .resources = wm831x_isink1_resources,
1352         },
1353         {
1354                 .name = "wm831x-isink",
1355                 .id = 2,
1356                 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1357                 .resources = wm831x_isink2_resources,
1358         },
1359         {
1360                 .name = "wm831x-ldo",
1361                 .id = 1,
1362                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1363                 .resources = wm831x_ldo1_resources,
1364         },
1365         {
1366                 .name = "wm831x-ldo",
1367                 .id = 2,
1368                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1369                 .resources = wm831x_ldo2_resources,
1370         },
1371         {
1372                 .name = "wm831x-ldo",
1373                 .id = 3,
1374                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1375                 .resources = wm831x_ldo3_resources,
1376         },
1377         {
1378                 .name = "wm831x-ldo",
1379                 .id = 4,
1380                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1381                 .resources = wm831x_ldo4_resources,
1382         },
1383         {
1384                 .name = "wm831x-ldo",
1385                 .id = 5,
1386                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1387                 .resources = wm831x_ldo5_resources,
1388         },
1389         {
1390                 .name = "wm831x-ldo",
1391                 .id = 6,
1392                 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1393                 .resources = wm831x_ldo6_resources,
1394         },
1395         {
1396                 .name = "wm831x-aldo",
1397                 .id = 7,
1398                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1399                 .resources = wm831x_ldo7_resources,
1400         },
1401         {
1402                 .name = "wm831x-aldo",
1403                 .id = 8,
1404                 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1405                 .resources = wm831x_ldo8_resources,
1406         },
1407         {
1408                 .name = "wm831x-aldo",
1409                 .id = 9,
1410                 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1411                 .resources = wm831x_ldo9_resources,
1412         },
1413         {
1414                 .name = "wm831x-aldo",
1415                 .id = 10,
1416                 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1417                 .resources = wm831x_ldo10_resources,
1418         },
1419         {
1420                 .name = "wm831x-alive-ldo",
1421                 .id = 11,
1422                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1423                 .resources = wm831x_ldo11_resources,
1424         },
1425         {
1426                 .name = "wm831x-on",
1427                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1428                 .resources = wm831x_on_resources,
1429         },
1430         {
1431                 .name = "wm831x-power",
1432                 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1433                 .resources = wm831x_power_resources,
1434         },
1435         {
1436                 .name = "wm831x-status",
1437                 .id = 1,
1438                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1439                 .resources = wm831x_status1_resources,
1440         },
1441         {
1442                 .name = "wm831x-status",
1443                 .id = 2,
1444                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1445                 .resources = wm831x_status2_resources,
1446         },
1447         {
1448                 .name = "wm831x-watchdog",
1449                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1450                 .resources = wm831x_wdt_resources,
1451         },
1452 };
1453
1454 static const struct mfd_cell wm8320_devs[] = {
1455         {
1456                 .name = "wm831x-backup",
1457         },
1458         {
1459                 .name = "wm831x-buckv",
1460                 .id = 1,
1461                 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1462                 .resources = wm831x_dcdc1_resources,
1463         },
1464         {
1465                 .name = "wm831x-buckv",
1466                 .id = 2,
1467                 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1468                 .resources = wm831x_dcdc2_resources,
1469         },
1470         {
1471                 .name = "wm831x-buckp",
1472                 .id = 3,
1473                 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1474                 .resources = wm831x_dcdc3_resources,
1475         },
1476         {
1477                 .name = "wm831x-buckp",
1478                 .id = 4,
1479                 .num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
1480                 .resources = wm8320_dcdc4_buck_resources,
1481         },
1482         {
1483                 .name = "wm831x-clk",
1484         },
1485         {
1486                 .name = "wm831x-gpio",
1487                 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1488                 .resources = wm831x_gpio_resources,
1489         },
1490         {
1491                 .name = "wm831x-hwmon",
1492         },
1493         {
1494                 .name = "wm831x-ldo",
1495                 .id = 1,
1496                 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1497                 .resources = wm831x_ldo1_resources,
1498         },
1499         {
1500                 .name = "wm831x-ldo",
1501                 .id = 2,
1502                 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1503                 .resources = wm831x_ldo2_resources,
1504         },
1505         {
1506                 .name = "wm831x-ldo",
1507                 .id = 3,
1508                 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1509                 .resources = wm831x_ldo3_resources,
1510         },
1511         {
1512                 .name = "wm831x-ldo",
1513                 .id = 4,
1514                 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1515                 .resources = wm831x_ldo4_resources,
1516         },
1517         {
1518                 .name = "wm831x-ldo",
1519                 .id = 5,
1520                 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1521                 .resources = wm831x_ldo5_resources,
1522         },
1523         {
1524                 .name = "wm831x-ldo",
1525                 .id = 6,
1526                 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1527                 .resources = wm831x_ldo6_resources,
1528         },
1529         {
1530                 .name = "wm831x-aldo",
1531                 .id = 7,
1532                 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1533                 .resources = wm831x_ldo7_resources,
1534         },
1535         {
1536                 .name = "wm831x-aldo",
1537                 .id = 8,
1538                 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1539                 .resources = wm831x_ldo8_resources,
1540         },
1541         {
1542                 .name = "wm831x-aldo",
1543                 .id = 9,
1544                 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1545                 .resources = wm831x_ldo9_resources,
1546         },
1547         {
1548                 .name = "wm831x-aldo",
1549                 .id = 10,
1550                 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1551                 .resources = wm831x_ldo10_resources,
1552         },
1553         {
1554                 .name = "wm831x-alive-ldo",
1555                 .id = 11,
1556                 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1557                 .resources = wm831x_ldo11_resources,
1558         },
1559         {
1560                 .name = "wm831x-on",
1561                 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1562                 .resources = wm831x_on_resources,
1563         },
1564         {
1565                 .name = "wm831x-status",
1566                 .id = 1,
1567                 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1568                 .resources = wm831x_status1_resources,
1569         },
1570         {
1571                 .name = "wm831x-status",
1572                 .id = 2,
1573                 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1574                 .resources = wm831x_status2_resources,
1575         },
1576         {
1577                 .name = "wm831x-watchdog",
1578                 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1579                 .resources = wm831x_wdt_resources,
1580         },
1581 };
1582
1583 static const struct mfd_cell touch_devs[] = {
1584         {
1585                 .name = "wm831x-touch",
1586                 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1587                 .resources = wm831x_touch_resources,
1588         },
1589 };
1590
1591 static const struct mfd_cell rtc_devs[] = {
1592         {
1593                 .name = "wm831x-rtc",
1594                 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1595                 .resources = wm831x_rtc_resources,
1596         },
1597 };
1598
1599 static const struct mfd_cell backlight_devs[] = {
1600         {
1601                 .name = "wm831x-backlight",
1602         },
1603 };
1604
1605 struct regmap_config wm831x_regmap_config = {
1606         .reg_bits = 16,
1607         .val_bits = 16,
1608
1609         .cache_type = REGCACHE_RBTREE,
1610
1611         .max_register = WM831X_DBE_CHECK_DATA,
1612         .readable_reg = wm831x_reg_readable,
1613         .writeable_reg = wm831x_reg_writeable,
1614         .volatile_reg = wm831x_reg_volatile,
1615 };
1616 EXPORT_SYMBOL_GPL(wm831x_regmap_config);
1617
1618 const struct of_device_id wm831x_of_match[] = {
1619         { .compatible = "wlf,wm8310", .data = (void *)WM8310 },
1620         { .compatible = "wlf,wm8311", .data = (void *)WM8311 },
1621         { .compatible = "wlf,wm8312", .data = (void *)WM8312 },
1622         { .compatible = "wlf,wm8320", .data = (void *)WM8320 },
1623         { .compatible = "wlf,wm8321", .data = (void *)WM8321 },
1624         { .compatible = "wlf,wm8325", .data = (void *)WM8325 },
1625         { .compatible = "wlf,wm8326", .data = (void *)WM8326 },
1626         { },
1627 };
1628 EXPORT_SYMBOL_GPL(wm831x_of_match);
1629
1630 /*
1631  * Instantiate the generic non-control parts of the device.
1632  */
1633 int wm831x_device_init(struct wm831x *wm831x, int irq)
1634 {
1635         struct wm831x_pdata *pdata = &wm831x->pdata;
1636         int rev, wm831x_num;
1637         enum wm831x_parent parent;
1638         int ret, i;
1639
1640         mutex_init(&wm831x->io_lock);
1641         mutex_init(&wm831x->key_lock);
1642         dev_set_drvdata(wm831x->dev, wm831x);
1643
1644         wm831x->soft_shutdown = pdata->soft_shutdown;
1645
1646         ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1647         if (ret < 0) {
1648                 dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1649                 goto err;
1650         }
1651         switch (ret) {
1652         case 0x6204:
1653         case 0x6246:
1654                 break;
1655         default:
1656                 dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1657                 ret = -EINVAL;
1658                 goto err;
1659         }
1660
1661         ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1662         if (ret < 0) {
1663                 dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1664                 goto err;
1665         }
1666         rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1667
1668         ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1669         if (ret < 0) {
1670                 dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1671                 goto err;
1672         }
1673
1674         /* Some engineering samples do not have the ID set, rely on
1675          * the device being registered correctly.
1676          */
1677         if (ret == 0) {
1678                 dev_info(wm831x->dev, "Device is an engineering sample\n");
1679                 ret = wm831x->type;
1680         }
1681
1682         switch (ret) {
1683         case WM8310:
1684                 parent = WM8310;
1685                 wm831x->num_gpio = 16;
1686                 wm831x->charger_irq_wake = 1;
1687                 if (rev > 0) {
1688                         wm831x->has_gpio_ena = 1;
1689                         wm831x->has_cs_sts = 1;
1690                 }
1691
1692                 dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
1693                 break;
1694
1695         case WM8311:
1696                 parent = WM8311;
1697                 wm831x->num_gpio = 16;
1698                 wm831x->charger_irq_wake = 1;
1699                 if (rev > 0) {
1700                         wm831x->has_gpio_ena = 1;
1701                         wm831x->has_cs_sts = 1;
1702                 }
1703
1704                 dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
1705                 break;
1706
1707         case WM8312:
1708                 parent = WM8312;
1709                 wm831x->num_gpio = 16;
1710                 wm831x->charger_irq_wake = 1;
1711                 if (rev > 0) {
1712                         wm831x->has_gpio_ena = 1;
1713                         wm831x->has_cs_sts = 1;
1714                 }
1715
1716                 dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
1717                 break;
1718
1719         case WM8320:
1720                 parent = WM8320;
1721                 wm831x->num_gpio = 12;
1722                 dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);
1723                 break;
1724
1725         case WM8321:
1726                 parent = WM8321;
1727                 wm831x->num_gpio = 12;
1728                 dev_info(wm831x->dev, "WM8321 revision %c\n", 'A' + rev);
1729                 break;
1730
1731         case WM8325:
1732                 parent = WM8325;
1733                 wm831x->num_gpio = 12;
1734                 dev_info(wm831x->dev, "WM8325 revision %c\n", 'A' + rev);
1735                 break;
1736
1737         case WM8326:
1738                 parent = WM8326;
1739                 wm831x->num_gpio = 12;
1740                 dev_info(wm831x->dev, "WM8326 revision %c\n", 'A' + rev);
1741                 break;
1742
1743         default:
1744                 dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1745                 ret = -EINVAL;
1746                 goto err;
1747         }
1748
1749         /* This will need revisiting in future but is OK for all
1750          * current parts.
1751          */
1752         if (parent != wm831x->type)
1753                 dev_warn(wm831x->dev, "Device was registered as a WM%x\n",
1754                          wm831x->type);
1755
1756         /* Bootstrap the user key */
1757         ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1758         if (ret < 0) {
1759                 dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1760                 goto err;
1761         }
1762         if (ret != 0) {
1763                 dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1764                          ret);
1765                 wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1766         }
1767         wm831x->locked = 1;
1768
1769         if (pdata->pre_init) {
1770                 ret = pdata->pre_init(wm831x);
1771                 if (ret != 0) {
1772                         dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1773                         goto err;
1774                 }
1775         }
1776
1777         for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
1778                 if (!pdata->gpio_defaults[i])
1779                         continue;
1780
1781                 wm831x_reg_write(wm831x,
1782                                  WM831X_GPIO1_CONTROL + i,
1783                                  pdata->gpio_defaults[i] & 0xffff);
1784         }
1785
1786         /* Multiply by 10 as we have many subdevices of the same type */
1787         if (pdata->wm831x_num)
1788                 wm831x_num = pdata->wm831x_num * 10;
1789         else
1790                 wm831x_num = -1;
1791
1792         ret = wm831x_irq_init(wm831x, irq);
1793         if (ret != 0)
1794                 goto err;
1795
1796         wm831x_auxadc_init(wm831x);
1797
1798         /* The core device is up, instantiate the subdevices. */
1799         switch (parent) {
1800         case WM8310:
1801                 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1802                                       wm8310_devs, ARRAY_SIZE(wm8310_devs),
1803                                       NULL, 0, NULL);
1804                 break;
1805
1806         case WM8311:
1807                 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1808                                       wm8311_devs, ARRAY_SIZE(wm8311_devs),
1809                                       NULL, 0, NULL);
1810                 if (!pdata->disable_touch)
1811                         mfd_add_devices(wm831x->dev, wm831x_num,
1812                                         touch_devs, ARRAY_SIZE(touch_devs),
1813                                         NULL, 0, NULL);
1814                 break;
1815
1816         case WM8312:
1817                 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1818                                       wm8312_devs, ARRAY_SIZE(wm8312_devs),
1819                                       NULL, 0, NULL);
1820                 if (!pdata->disable_touch)
1821                         mfd_add_devices(wm831x->dev, wm831x_num,
1822                                         touch_devs, ARRAY_SIZE(touch_devs),
1823                                         NULL, 0, NULL);
1824                 break;
1825
1826         case WM8320:
1827         case WM8321:
1828         case WM8325:
1829         case WM8326:
1830                 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1831                                       wm8320_devs, ARRAY_SIZE(wm8320_devs),
1832                                       NULL, 0, NULL);
1833                 break;
1834
1835         default:
1836                 /* If this happens the bus probe function is buggy */
1837                 BUG();
1838         }
1839
1840         if (ret != 0) {
1841                 dev_err(wm831x->dev, "Failed to add children\n");
1842                 goto err_irq;
1843         }
1844
1845         /* The RTC can only be used if the 32.768kHz crystal is
1846          * enabled; this can't be controlled by software at runtime.
1847          */
1848         ret = wm831x_reg_read(wm831x, WM831X_CLOCK_CONTROL_2);
1849         if (ret < 0) {
1850                 dev_err(wm831x->dev, "Failed to read clock status: %d\n", ret);
1851                 goto err_irq;
1852         }
1853
1854         if (ret & WM831X_XTAL_ENA) {
1855                 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1856                                       rtc_devs, ARRAY_SIZE(rtc_devs),
1857                                       NULL, 0, NULL);
1858                 if (ret != 0) {
1859                         dev_err(wm831x->dev, "Failed to add RTC: %d\n", ret);
1860                         goto err_irq;
1861                 }
1862         } else {
1863                 dev_info(wm831x->dev, "32.768kHz clock disabled, no RTC\n");
1864         }
1865
1866         if (pdata->backlight) {
1867                 /* Treat errors as non-critical */
1868                 ret = mfd_add_devices(wm831x->dev, wm831x_num, backlight_devs,
1869                                       ARRAY_SIZE(backlight_devs), NULL,
1870                                       0, NULL);
1871                 if (ret < 0)
1872                         dev_err(wm831x->dev, "Failed to add backlight: %d\n",
1873                                 ret);
1874         }
1875
1876         wm831x_otp_init(wm831x);
1877
1878         if (pdata->post_init) {
1879                 ret = pdata->post_init(wm831x);
1880                 if (ret != 0) {
1881                         dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1882                         goto err_irq;
1883                 }
1884         }
1885
1886         return 0;
1887
1888 err_irq:
1889         wm831x_irq_exit(wm831x);
1890 err:
1891         mfd_remove_devices(wm831x->dev);
1892         return ret;
1893 }
1894
1895 int wm831x_device_suspend(struct wm831x *wm831x)
1896 {
1897         int reg, mask;
1898
1899         /* If the charger IRQs are a wake source then make sure we ack
1900          * them even if they're not actively being used (eg, no power
1901          * driver or no IRQ line wired up) then acknowledge the
1902          * interrupts otherwise suspend won't last very long.
1903          */
1904         if (wm831x->charger_irq_wake) {
1905                 reg = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_2_MASK);
1906
1907                 mask = WM831X_CHG_BATT_HOT_EINT |
1908                         WM831X_CHG_BATT_COLD_EINT |
1909                         WM831X_CHG_BATT_FAIL_EINT |
1910                         WM831X_CHG_OV_EINT | WM831X_CHG_END_EINT |
1911                         WM831X_CHG_TO_EINT | WM831X_CHG_MODE_EINT |
1912                         WM831X_CHG_START_EINT;
1913
1914                 /* If any of the interrupts are masked read the statuses */
1915                 if (reg & mask)
1916                         reg = wm831x_reg_read(wm831x,
1917                                               WM831X_INTERRUPT_STATUS_2);
1918
1919                 if (reg & mask) {
1920                         dev_info(wm831x->dev,
1921                                  "Acknowledging masked charger IRQs: %x\n",
1922                                  reg & mask);
1923                         wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_2,
1924                                          reg & mask);
1925                 }
1926         }
1927
1928         return 0;
1929 }
1930
1931 void wm831x_device_shutdown(struct wm831x *wm831x)
1932 {
1933         if (wm831x->soft_shutdown) {
1934                 dev_info(wm831x->dev, "Initiating shutdown...\n");
1935                 wm831x_set_bits(wm831x, WM831X_POWER_STATE, WM831X_CHIP_ON, 0);
1936         }
1937 }
1938 EXPORT_SYMBOL_GPL(wm831x_device_shutdown);