xref: /linux/drivers/mfd/wm831x-core.c (revision c0c914eca7f251c70facc37dfebeaf176601918d) 
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 
1630 	if (pdata)
1631 		wm831x->soft_shutdown = pdata->soft_shutdown;
1632 
1633 	ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1634 	if (ret < 0) {
1635 		dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1636 		goto err;
1637 	}
1638 	switch (ret) {
1639 	case 0x6204:
1640 	case 0x6246:
1641 		break;
1642 	default:
1643 		dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1644 		ret = -EINVAL;
1645 		goto err;
1646 	}
1647 
1648 	ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1649 	if (ret < 0) {
1650 		dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1651 		goto err;
1652 	}
1653 	rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1654 
1655 	ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1656 	if (ret < 0) {
1657 		dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1658 		goto err;
1659 	}
1660 
1661 	/* Some engineering samples do not have the ID set, rely on
1662 	 * the device being registered correctly.
1663 	 */
1664 	if (ret == 0) {
1665 		dev_info(wm831x->dev, "Device is an engineering sample\n");
1666 		ret = id;
1667 	}
1668 
1669 	switch (ret) {
1670 	case WM8310:
1671 		parent = WM8310;
1672 		wm831x->num_gpio = 16;
1673 		wm831x->charger_irq_wake = 1;
1674 		if (rev > 0) {
1675 			wm831x->has_gpio_ena = 1;
1676 			wm831x->has_cs_sts = 1;
1677 		}
1678 
1679 		dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
1680 		break;
1681 
1682 	case WM8311:
1683 		parent = WM8311;
1684 		wm831x->num_gpio = 16;
1685 		wm831x->charger_irq_wake = 1;
1686 		if (rev > 0) {
1687 			wm831x->has_gpio_ena = 1;
1688 			wm831x->has_cs_sts = 1;
1689 		}
1690 
1691 		dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
1692 		break;
1693 
1694 	case WM8312:
1695 		parent = WM8312;
1696 		wm831x->num_gpio = 16;
1697 		wm831x->charger_irq_wake = 1;
1698 		if (rev > 0) {
1699 			wm831x->has_gpio_ena = 1;
1700 			wm831x->has_cs_sts = 1;
1701 		}
1702 
1703 		dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
1704 		break;
1705 
1706 	case WM8320:
1707 		parent = WM8320;
1708 		wm831x->num_gpio = 12;
1709 		dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);
1710 		break;
1711 
1712 	case WM8321:
1713 		parent = WM8321;
1714 		wm831x->num_gpio = 12;
1715 		dev_info(wm831x->dev, "WM8321 revision %c\n", 'A' + rev);
1716 		break;
1717 
1718 	case WM8325:
1719 		parent = WM8325;
1720 		wm831x->num_gpio = 12;
1721 		dev_info(wm831x->dev, "WM8325 revision %c\n", 'A' + rev);
1722 		break;
1723 
1724 	case WM8326:
1725 		parent = WM8326;
1726 		wm831x->num_gpio = 12;
1727 		dev_info(wm831x->dev, "WM8326 revision %c\n", 'A' + rev);
1728 		break;
1729 
1730 	default:
1731 		dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1732 		ret = -EINVAL;
1733 		goto err;
1734 	}
1735 
1736 	/* This will need revisiting in future but is OK for all
1737 	 * current parts.
1738 	 */
1739 	if (parent != id)
1740 		dev_warn(wm831x->dev, "Device was registered as a WM%lx\n",
1741 			 id);
1742 
1743 	/* Bootstrap the user key */
1744 	ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1745 	if (ret < 0) {
1746 		dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1747 		goto err;
1748 	}
1749 	if (ret != 0) {
1750 		dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1751 			 ret);
1752 		wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1753 	}
1754 	wm831x->locked = 1;
1755 
1756 	if (pdata && pdata->pre_init) {
1757 		ret = pdata->pre_init(wm831x);
1758 		if (ret != 0) {
1759 			dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1760 			goto err;
1761 		}
1762 	}
1763 
1764 	if (pdata) {
1765 		for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
1766 			if (!pdata->gpio_defaults[i])
1767 				continue;
1768 
1769 			wm831x_reg_write(wm831x,
1770 					 WM831X_GPIO1_CONTROL + i,
1771 					 pdata->gpio_defaults[i] & 0xffff);
1772 		}
1773 	}
1774 
1775 	/* Multiply by 10 as we have many subdevices of the same type */
1776 	if (pdata && pdata->wm831x_num)
1777 		wm831x_num = pdata->wm831x_num * 10;
1778 	else
1779 		wm831x_num = -1;
1780 
1781 	ret = wm831x_irq_init(wm831x, irq);
1782 	if (ret != 0)
1783 		goto err;
1784 
1785 	wm831x_auxadc_init(wm831x);
1786 
1787 	/* The core device is up, instantiate the subdevices. */
1788 	switch (parent) {
1789 	case WM8310:
1790 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1791 				      wm8310_devs, ARRAY_SIZE(wm8310_devs),
1792 				      NULL, 0, NULL);
1793 		break;
1794 
1795 	case WM8311:
1796 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1797 				      wm8311_devs, ARRAY_SIZE(wm8311_devs),
1798 				      NULL, 0, NULL);
1799 		if (!pdata || !pdata->disable_touch)
1800 			mfd_add_devices(wm831x->dev, wm831x_num,
1801 					touch_devs, ARRAY_SIZE(touch_devs),
1802 					NULL, 0, NULL);
1803 		break;
1804 
1805 	case WM8312:
1806 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1807 				      wm8312_devs, ARRAY_SIZE(wm8312_devs),
1808 				      NULL, 0, NULL);
1809 		if (!pdata || !pdata->disable_touch)
1810 			mfd_add_devices(wm831x->dev, wm831x_num,
1811 					touch_devs, ARRAY_SIZE(touch_devs),
1812 					NULL, 0, NULL);
1813 		break;
1814 
1815 	case WM8320:
1816 	case WM8321:
1817 	case WM8325:
1818 	case WM8326:
1819 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1820 				      wm8320_devs, ARRAY_SIZE(wm8320_devs),
1821 				      NULL, 0, NULL);
1822 		break;
1823 
1824 	default:
1825 		/* If this happens the bus probe function is buggy */
1826 		BUG();
1827 	}
1828 
1829 	if (ret != 0) {
1830 		dev_err(wm831x->dev, "Failed to add children\n");
1831 		goto err_irq;
1832 	}
1833 
1834 	/* The RTC can only be used if the 32.768kHz crystal is
1835 	 * enabled; this can't be controlled by software at runtime.
1836 	 */
1837 	ret = wm831x_reg_read(wm831x, WM831X_CLOCK_CONTROL_2);
1838 	if (ret < 0) {
1839 		dev_err(wm831x->dev, "Failed to read clock status: %d\n", ret);
1840 		goto err_irq;
1841 	}
1842 
1843 	if (ret & WM831X_XTAL_ENA) {
1844 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1845 				      rtc_devs, ARRAY_SIZE(rtc_devs),
1846 				      NULL, 0, NULL);
1847 		if (ret != 0) {
1848 			dev_err(wm831x->dev, "Failed to add RTC: %d\n", ret);
1849 			goto err_irq;
1850 		}
1851 	} else {
1852 		dev_info(wm831x->dev, "32.768kHz clock disabled, no RTC\n");
1853 	}
1854 
1855 	if (pdata && pdata->backlight) {
1856 		/* Treat errors as non-critical */
1857 		ret = mfd_add_devices(wm831x->dev, wm831x_num, backlight_devs,
1858 				      ARRAY_SIZE(backlight_devs), NULL,
1859 				      0, NULL);
1860 		if (ret < 0)
1861 			dev_err(wm831x->dev, "Failed to add backlight: %d\n",
1862 				ret);
1863 	}
1864 
1865 	wm831x_otp_init(wm831x);
1866 
1867 	if (pdata && pdata->post_init) {
1868 		ret = pdata->post_init(wm831x);
1869 		if (ret != 0) {
1870 			dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1871 			goto err_irq;
1872 		}
1873 	}
1874 
1875 	return 0;
1876 
1877 err_irq:
1878 	wm831x_irq_exit(wm831x);
1879 err:
1880 	mfd_remove_devices(wm831x->dev);
1881 	return ret;
1882 }
1883 
1884 void wm831x_device_exit(struct wm831x *wm831x)
1885 {
1886 	wm831x_otp_exit(wm831x);
1887 	mfd_remove_devices(wm831x->dev);
1888 	free_irq(wm831x_irq(wm831x, WM831X_IRQ_AUXADC_DATA), wm831x);
1889 	wm831x_irq_exit(wm831x);
1890 }
1891 
1892 int wm831x_device_suspend(struct wm831x *wm831x)
1893 {
1894 	int reg, mask;
1895 
1896 	/* If the charger IRQs are a wake source then make sure we ack
1897 	 * them even if they're not actively being used (eg, no power
1898 	 * driver or no IRQ line wired up) then acknowledge the
1899 	 * interrupts otherwise suspend won't last very long.
1900 	 */
1901 	if (wm831x->charger_irq_wake) {
1902 		reg = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_2_MASK);
1903 
1904 		mask = WM831X_CHG_BATT_HOT_EINT |
1905 			WM831X_CHG_BATT_COLD_EINT |
1906 			WM831X_CHG_BATT_FAIL_EINT |
1907 			WM831X_CHG_OV_EINT | WM831X_CHG_END_EINT |
1908 			WM831X_CHG_TO_EINT | WM831X_CHG_MODE_EINT |
1909 			WM831X_CHG_START_EINT;
1910 
1911 		/* If any of the interrupts are masked read the statuses */
1912 		if (reg & mask)
1913 			reg = wm831x_reg_read(wm831x,
1914 					      WM831X_INTERRUPT_STATUS_2);
1915 
1916 		if (reg & mask) {
1917 			dev_info(wm831x->dev,
1918 				 "Acknowledging masked charger IRQs: %x\n",
1919 				 reg & mask);
1920 			wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_2,
1921 					 reg & mask);
1922 		}
1923 	}
1924 
1925 	return 0;
1926 }
1927 
1928 void wm831x_device_shutdown(struct wm831x *wm831x)
1929 {
1930 	if (wm831x->soft_shutdown) {
1931 		dev_info(wm831x->dev, "Initiating shutdown...\n");
1932 		wm831x_set_bits(wm831x, WM831X_POWER_STATE, WM831X_CHIP_ON, 0);
1933 	}
1934 }
1935 EXPORT_SYMBOL_GPL(wm831x_device_shutdown);
1936 
1937 MODULE_DESCRIPTION("Core support for the WM831X AudioPlus PMIC");
1938 MODULE_LICENSE("GPL");
1939 MODULE_AUTHOR("Mark Brown");
1940