xref: /openbmc/linux/drivers/mfd/wm831x-core.c (revision 3557b3fd) 
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/init.h>
17 #include <linux/export.h>
18 #include <linux/bcd.h>
19 #include <linux/delay.h>
20 #include <linux/mfd/core.h>
21 #include <linux/slab.h>
22 #include <linux/err.h>
23 #include <linux/of.h>
24 #include <linux/of_device.h>
25 
26 #include <linux/mfd/wm831x/core.h>
27 #include <linux/mfd/wm831x/pdata.h>
28 #include <linux/mfd/wm831x/irq.h>
29 #include <linux/mfd/wm831x/auxadc.h>
30 #include <linux/mfd/wm831x/otp.h>
31 #include <linux/mfd/wm831x/pmu.h>
32 #include <linux/mfd/wm831x/regulator.h>
33 
34 /* Current settings - values are 2*2^(reg_val/4) microamps.  These are
35  * exported since they are used by multiple drivers.
36  */
37 int wm831x_isinkv_values[WM831X_ISINK_MAX_ISEL + 1] = {
38 	2,
39 	2,
40 	3,
41 	3,
42 	4,
43 	5,
44 	6,
45 	7,
46 	8,
47 	10,
48 	11,
49 	13,
50 	16,
51 	19,
52 	23,
53 	27,
54 	32,
55 	38,
56 	45,
57 	54,
58 	64,
59 	76,
60 	91,
61 	108,
62 	128,
63 	152,
64 	181,
65 	215,
66 	256,
67 	304,
68 	362,
69 	431,
70 	512,
71 	609,
72 	724,
73 	861,
74 	1024,
75 	1218,
76 	1448,
77 	1722,
78 	2048,
79 	2435,
80 	2896,
81 	3444,
82 	4096,
83 	4871,
84 	5793,
85 	6889,
86 	8192,
87 	9742,
88 	11585,
89 	13777,
90 	16384,
91 	19484,
92 	23170,
93 	27554,
94 };
95 EXPORT_SYMBOL_GPL(wm831x_isinkv_values);
96 
97 static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg)
98 {
99 	if (!wm831x->locked)
100 		return 0;
101 
102 	switch (reg) {
103 	case WM831X_WATCHDOG:
104 	case WM831X_DC4_CONTROL:
105 	case WM831X_ON_PIN_CONTROL:
106 	case WM831X_BACKUP_CHARGER_CONTROL:
107 	case WM831X_CHARGER_CONTROL_1:
108 	case WM831X_CHARGER_CONTROL_2:
109 		return 1;
110 
111 	default:
112 		return 0;
113 	}
114 }
115 
116 /**
117  * wm831x_reg_unlock: Unlock user keyed registers
118  *
119  * The WM831x has a user key preventing writes to particularly
120  * critical registers.  This function locks those registers,
121  * allowing writes to them.
122  */
123 void wm831x_reg_lock(struct wm831x *wm831x)
124 {
125 	int ret;
126 
127 	ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
128 	if (ret == 0) {
129 		dev_vdbg(wm831x->dev, "Registers locked\n");
130 
131 		mutex_lock(&wm831x->io_lock);
132 		WARN_ON(wm831x->locked);
133 		wm831x->locked = 1;
134 		mutex_unlock(&wm831x->io_lock);
135 	} else {
136 		dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret);
137 	}
138 
139 }
140 EXPORT_SYMBOL_GPL(wm831x_reg_lock);
141 
142 /**
143  * wm831x_reg_unlock: Unlock user keyed registers
144  *
145  * The WM831x has a user key preventing writes to particularly
146  * critical registers.  This function locks those registers,
147  * preventing spurious writes.
148  */
149 int wm831x_reg_unlock(struct wm831x *wm831x)
150 {
151 	int ret;
152 
153 	/* 0x9716 is the value required to unlock the registers */
154 	ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716);
155 	if (ret == 0) {
156 		dev_vdbg(wm831x->dev, "Registers unlocked\n");
157 
158 		mutex_lock(&wm831x->io_lock);
159 		WARN_ON(!wm831x->locked);
160 		wm831x->locked = 0;
161 		mutex_unlock(&wm831x->io_lock);
162 	}
163 
164 	return ret;
165 }
166 EXPORT_SYMBOL_GPL(wm831x_reg_unlock);
167 
168 static bool wm831x_reg_readable(struct device *dev, unsigned int reg)
169 {
170 	switch (reg) {
171 	case WM831X_RESET_ID:
172 	case WM831X_REVISION:
173 	case WM831X_PARENT_ID:
174 	case WM831X_SYSVDD_CONTROL:
175 	case WM831X_THERMAL_MONITORING:
176 	case WM831X_POWER_STATE:
177 	case WM831X_WATCHDOG:
178 	case WM831X_ON_PIN_CONTROL:
179 	case WM831X_RESET_CONTROL:
180 	case WM831X_CONTROL_INTERFACE:
181 	case WM831X_SECURITY_KEY:
182 	case WM831X_SOFTWARE_SCRATCH:
183 	case WM831X_OTP_CONTROL:
184 	case WM831X_GPIO_LEVEL:
185 	case WM831X_SYSTEM_STATUS:
186 	case WM831X_ON_SOURCE:
187 	case WM831X_OFF_SOURCE:
188 	case WM831X_SYSTEM_INTERRUPTS:
189 	case WM831X_INTERRUPT_STATUS_1:
190 	case WM831X_INTERRUPT_STATUS_2:
191 	case WM831X_INTERRUPT_STATUS_3:
192 	case WM831X_INTERRUPT_STATUS_4:
193 	case WM831X_INTERRUPT_STATUS_5:
194 	case WM831X_IRQ_CONFIG:
195 	case WM831X_SYSTEM_INTERRUPTS_MASK:
196 	case WM831X_INTERRUPT_STATUS_1_MASK:
197 	case WM831X_INTERRUPT_STATUS_2_MASK:
198 	case WM831X_INTERRUPT_STATUS_3_MASK:
199 	case WM831X_INTERRUPT_STATUS_4_MASK:
200 	case WM831X_INTERRUPT_STATUS_5_MASK:
201 	case WM831X_RTC_WRITE_COUNTER:
202 	case WM831X_RTC_TIME_1:
203 	case WM831X_RTC_TIME_2:
204 	case WM831X_RTC_ALARM_1:
205 	case WM831X_RTC_ALARM_2:
206 	case WM831X_RTC_CONTROL:
207 	case WM831X_RTC_TRIM:
208 	case WM831X_TOUCH_CONTROL_1:
209 	case WM831X_TOUCH_CONTROL_2:
210 	case WM831X_TOUCH_DATA_X:
211 	case WM831X_TOUCH_DATA_Y:
212 	case WM831X_TOUCH_DATA_Z:
213 	case WM831X_AUXADC_DATA:
214 	case WM831X_AUXADC_CONTROL:
215 	case WM831X_AUXADC_SOURCE:
216 	case WM831X_COMPARATOR_CONTROL:
217 	case WM831X_COMPARATOR_1:
218 	case WM831X_COMPARATOR_2:
219 	case WM831X_COMPARATOR_3:
220 	case WM831X_COMPARATOR_4:
221 	case WM831X_GPIO1_CONTROL:
222 	case WM831X_GPIO2_CONTROL:
223 	case WM831X_GPIO3_CONTROL:
224 	case WM831X_GPIO4_CONTROL:
225 	case WM831X_GPIO5_CONTROL:
226 	case WM831X_GPIO6_CONTROL:
227 	case WM831X_GPIO7_CONTROL:
228 	case WM831X_GPIO8_CONTROL:
229 	case WM831X_GPIO9_CONTROL:
230 	case WM831X_GPIO10_CONTROL:
231 	case WM831X_GPIO11_CONTROL:
232 	case WM831X_GPIO12_CONTROL:
233 	case WM831X_GPIO13_CONTROL:
234 	case WM831X_GPIO14_CONTROL:
235 	case WM831X_GPIO15_CONTROL:
236 	case WM831X_GPIO16_CONTROL:
237 	case WM831X_CHARGER_CONTROL_1:
238 	case WM831X_CHARGER_CONTROL_2:
239 	case WM831X_CHARGER_STATUS:
240 	case WM831X_BACKUP_CHARGER_CONTROL:
241 	case WM831X_STATUS_LED_1:
242 	case WM831X_STATUS_LED_2:
243 	case WM831X_CURRENT_SINK_1:
244 	case WM831X_CURRENT_SINK_2:
245 	case WM831X_DCDC_ENABLE:
246 	case WM831X_LDO_ENABLE:
247 	case WM831X_DCDC_STATUS:
248 	case WM831X_LDO_STATUS:
249 	case WM831X_DCDC_UV_STATUS:
250 	case WM831X_LDO_UV_STATUS:
251 	case WM831X_DC1_CONTROL_1:
252 	case WM831X_DC1_CONTROL_2:
253 	case WM831X_DC1_ON_CONFIG:
254 	case WM831X_DC1_SLEEP_CONTROL:
255 	case WM831X_DC1_DVS_CONTROL:
256 	case WM831X_DC2_CONTROL_1:
257 	case WM831X_DC2_CONTROL_2:
258 	case WM831X_DC2_ON_CONFIG:
259 	case WM831X_DC2_SLEEP_CONTROL:
260 	case WM831X_DC2_DVS_CONTROL:
261 	case WM831X_DC3_CONTROL_1:
262 	case WM831X_DC3_CONTROL_2:
263 	case WM831X_DC3_ON_CONFIG:
264 	case WM831X_DC3_SLEEP_CONTROL:
265 	case WM831X_DC4_CONTROL:
266 	case WM831X_DC4_SLEEP_CONTROL:
267 	case WM831X_EPE1_CONTROL:
268 	case WM831X_EPE2_CONTROL:
269 	case WM831X_LDO1_CONTROL:
270 	case WM831X_LDO1_ON_CONTROL:
271 	case WM831X_LDO1_SLEEP_CONTROL:
272 	case WM831X_LDO2_CONTROL:
273 	case WM831X_LDO2_ON_CONTROL:
274 	case WM831X_LDO2_SLEEP_CONTROL:
275 	case WM831X_LDO3_CONTROL:
276 	case WM831X_LDO3_ON_CONTROL:
277 	case WM831X_LDO3_SLEEP_CONTROL:
278 	case WM831X_LDO4_CONTROL:
279 	case WM831X_LDO4_ON_CONTROL:
280 	case WM831X_LDO4_SLEEP_CONTROL:
281 	case WM831X_LDO5_CONTROL:
282 	case WM831X_LDO5_ON_CONTROL:
283 	case WM831X_LDO5_SLEEP_CONTROL:
284 	case WM831X_LDO6_CONTROL:
285 	case WM831X_LDO6_ON_CONTROL:
286 	case WM831X_LDO6_SLEEP_CONTROL:
287 	case WM831X_LDO7_CONTROL:
288 	case WM831X_LDO7_ON_CONTROL:
289 	case WM831X_LDO7_SLEEP_CONTROL:
290 	case WM831X_LDO8_CONTROL:
291 	case WM831X_LDO8_ON_CONTROL:
292 	case WM831X_LDO8_SLEEP_CONTROL:
293 	case WM831X_LDO9_CONTROL:
294 	case WM831X_LDO9_ON_CONTROL:
295 	case WM831X_LDO9_SLEEP_CONTROL:
296 	case WM831X_LDO10_CONTROL:
297 	case WM831X_LDO10_ON_CONTROL:
298 	case WM831X_LDO10_SLEEP_CONTROL:
299 	case WM831X_LDO11_ON_CONTROL:
300 	case WM831X_LDO11_SLEEP_CONTROL:
301 	case WM831X_POWER_GOOD_SOURCE_1:
302 	case WM831X_POWER_GOOD_SOURCE_2:
303 	case WM831X_CLOCK_CONTROL_1:
304 	case WM831X_CLOCK_CONTROL_2:
305 	case WM831X_FLL_CONTROL_1:
306 	case WM831X_FLL_CONTROL_2:
307 	case WM831X_FLL_CONTROL_3:
308 	case WM831X_FLL_CONTROL_4:
309 	case WM831X_FLL_CONTROL_5:
310 	case WM831X_UNIQUE_ID_1:
311 	case WM831X_UNIQUE_ID_2:
312 	case WM831X_UNIQUE_ID_3:
313 	case WM831X_UNIQUE_ID_4:
314 	case WM831X_UNIQUE_ID_5:
315 	case WM831X_UNIQUE_ID_6:
316 	case WM831X_UNIQUE_ID_7:
317 	case WM831X_UNIQUE_ID_8:
318 	case WM831X_FACTORY_OTP_ID:
319 	case WM831X_FACTORY_OTP_1:
320 	case WM831X_FACTORY_OTP_2:
321 	case WM831X_FACTORY_OTP_3:
322 	case WM831X_FACTORY_OTP_4:
323 	case WM831X_FACTORY_OTP_5:
324 	case WM831X_CUSTOMER_OTP_ID:
325 	case WM831X_DC1_OTP_CONTROL:
326 	case WM831X_DC2_OTP_CONTROL:
327 	case WM831X_DC3_OTP_CONTROL:
328 	case WM831X_LDO1_2_OTP_CONTROL:
329 	case WM831X_LDO3_4_OTP_CONTROL:
330 	case WM831X_LDO5_6_OTP_CONTROL:
331 	case WM831X_LDO7_8_OTP_CONTROL:
332 	case WM831X_LDO9_10_OTP_CONTROL:
333 	case WM831X_LDO11_EPE_CONTROL:
334 	case WM831X_GPIO1_OTP_CONTROL:
335 	case WM831X_GPIO2_OTP_CONTROL:
336 	case WM831X_GPIO3_OTP_CONTROL:
337 	case WM831X_GPIO4_OTP_CONTROL:
338 	case WM831X_GPIO5_OTP_CONTROL:
339 	case WM831X_GPIO6_OTP_CONTROL:
340 	case WM831X_DBE_CHECK_DATA:
341 		return true;
342 	default:
343 		return false;
344 	}
345 }
346 
347 static bool wm831x_reg_writeable(struct device *dev, unsigned int reg)
348 {
349 	struct wm831x *wm831x = dev_get_drvdata(dev);
350 
351 	if (wm831x_reg_locked(wm831x, reg))
352 		return false;
353 
354 	switch (reg) {
355 	case WM831X_SYSVDD_CONTROL:
356 	case WM831X_THERMAL_MONITORING:
357 	case WM831X_POWER_STATE:
358 	case WM831X_WATCHDOG:
359 	case WM831X_ON_PIN_CONTROL:
360 	case WM831X_RESET_CONTROL:
361 	case WM831X_CONTROL_INTERFACE:
362 	case WM831X_SECURITY_KEY:
363 	case WM831X_SOFTWARE_SCRATCH:
364 	case WM831X_OTP_CONTROL:
365 	case WM831X_GPIO_LEVEL:
366 	case WM831X_INTERRUPT_STATUS_1:
367 	case WM831X_INTERRUPT_STATUS_2:
368 	case WM831X_INTERRUPT_STATUS_3:
369 	case WM831X_INTERRUPT_STATUS_4:
370 	case WM831X_INTERRUPT_STATUS_5:
371 	case WM831X_IRQ_CONFIG:
372 	case WM831X_SYSTEM_INTERRUPTS_MASK:
373 	case WM831X_INTERRUPT_STATUS_1_MASK:
374 	case WM831X_INTERRUPT_STATUS_2_MASK:
375 	case WM831X_INTERRUPT_STATUS_3_MASK:
376 	case WM831X_INTERRUPT_STATUS_4_MASK:
377 	case WM831X_INTERRUPT_STATUS_5_MASK:
378 	case WM831X_RTC_TIME_1:
379 	case WM831X_RTC_TIME_2:
380 	case WM831X_RTC_ALARM_1:
381 	case WM831X_RTC_ALARM_2:
382 	case WM831X_RTC_CONTROL:
383 	case WM831X_RTC_TRIM:
384 	case WM831X_TOUCH_CONTROL_1:
385 	case WM831X_TOUCH_CONTROL_2:
386 	case WM831X_AUXADC_CONTROL:
387 	case WM831X_AUXADC_SOURCE:
388 	case WM831X_COMPARATOR_CONTROL:
389 	case WM831X_COMPARATOR_1:
390 	case WM831X_COMPARATOR_2:
391 	case WM831X_COMPARATOR_3:
392 	case WM831X_COMPARATOR_4:
393 	case WM831X_GPIO1_CONTROL:
394 	case WM831X_GPIO2_CONTROL:
395 	case WM831X_GPIO3_CONTROL:
396 	case WM831X_GPIO4_CONTROL:
397 	case WM831X_GPIO5_CONTROL:
398 	case WM831X_GPIO6_CONTROL:
399 	case WM831X_GPIO7_CONTROL:
400 	case WM831X_GPIO8_CONTROL:
401 	case WM831X_GPIO9_CONTROL:
402 	case WM831X_GPIO10_CONTROL:
403 	case WM831X_GPIO11_CONTROL:
404 	case WM831X_GPIO12_CONTROL:
405 	case WM831X_GPIO13_CONTROL:
406 	case WM831X_GPIO14_CONTROL:
407 	case WM831X_GPIO15_CONTROL:
408 	case WM831X_GPIO16_CONTROL:
409 	case WM831X_CHARGER_CONTROL_1:
410 	case WM831X_CHARGER_CONTROL_2:
411 	case WM831X_CHARGER_STATUS:
412 	case WM831X_BACKUP_CHARGER_CONTROL:
413 	case WM831X_STATUS_LED_1:
414 	case WM831X_STATUS_LED_2:
415 	case WM831X_CURRENT_SINK_1:
416 	case WM831X_CURRENT_SINK_2:
417 	case WM831X_DCDC_ENABLE:
418 	case WM831X_LDO_ENABLE:
419 	case WM831X_DC1_CONTROL_1:
420 	case WM831X_DC1_CONTROL_2:
421 	case WM831X_DC1_ON_CONFIG:
422 	case WM831X_DC1_SLEEP_CONTROL:
423 	case WM831X_DC1_DVS_CONTROL:
424 	case WM831X_DC2_CONTROL_1:
425 	case WM831X_DC2_CONTROL_2:
426 	case WM831X_DC2_ON_CONFIG:
427 	case WM831X_DC2_SLEEP_CONTROL:
428 	case WM831X_DC2_DVS_CONTROL:
429 	case WM831X_DC3_CONTROL_1:
430 	case WM831X_DC3_CONTROL_2:
431 	case WM831X_DC3_ON_CONFIG:
432 	case WM831X_DC3_SLEEP_CONTROL:
433 	case WM831X_DC4_CONTROL:
434 	case WM831X_DC4_SLEEP_CONTROL:
435 	case WM831X_EPE1_CONTROL:
436 	case WM831X_EPE2_CONTROL:
437 	case WM831X_LDO1_CONTROL:
438 	case WM831X_LDO1_ON_CONTROL:
439 	case WM831X_LDO1_SLEEP_CONTROL:
440 	case WM831X_LDO2_CONTROL:
441 	case WM831X_LDO2_ON_CONTROL:
442 	case WM831X_LDO2_SLEEP_CONTROL:
443 	case WM831X_LDO3_CONTROL:
444 	case WM831X_LDO3_ON_CONTROL:
445 	case WM831X_LDO3_SLEEP_CONTROL:
446 	case WM831X_LDO4_CONTROL:
447 	case WM831X_LDO4_ON_CONTROL:
448 	case WM831X_LDO4_SLEEP_CONTROL:
449 	case WM831X_LDO5_CONTROL:
450 	case WM831X_LDO5_ON_CONTROL:
451 	case WM831X_LDO5_SLEEP_CONTROL:
452 	case WM831X_LDO6_CONTROL:
453 	case WM831X_LDO6_ON_CONTROL:
454 	case WM831X_LDO6_SLEEP_CONTROL:
455 	case WM831X_LDO7_CONTROL:
456 	case WM831X_LDO7_ON_CONTROL:
457 	case WM831X_LDO7_SLEEP_CONTROL:
458 	case WM831X_LDO8_CONTROL:
459 	case WM831X_LDO8_ON_CONTROL:
460 	case WM831X_LDO8_SLEEP_CONTROL:
461 	case WM831X_LDO9_CONTROL:
462 	case WM831X_LDO9_ON_CONTROL:
463 	case WM831X_LDO9_SLEEP_CONTROL:
464 	case WM831X_LDO10_CONTROL:
465 	case WM831X_LDO10_ON_CONTROL:
466 	case WM831X_LDO10_SLEEP_CONTROL:
467 	case WM831X_LDO11_ON_CONTROL:
468 	case WM831X_LDO11_SLEEP_CONTROL:
469 	case WM831X_POWER_GOOD_SOURCE_1:
470 	case WM831X_POWER_GOOD_SOURCE_2:
471 	case WM831X_CLOCK_CONTROL_1:
472 	case WM831X_CLOCK_CONTROL_2:
473 	case WM831X_FLL_CONTROL_1:
474 	case WM831X_FLL_CONTROL_2:
475 	case WM831X_FLL_CONTROL_3:
476 	case WM831X_FLL_CONTROL_4:
477 	case WM831X_FLL_CONTROL_5:
478 		return true;
479 	default:
480 		return false;
481 	}
482 }
483 
484 static bool wm831x_reg_volatile(struct device *dev, unsigned int reg)
485 {
486 	switch (reg) {
487 	case WM831X_SYSTEM_STATUS:
488 	case WM831X_ON_SOURCE:
489 	case WM831X_OFF_SOURCE:
490 	case WM831X_GPIO_LEVEL:
491 	case WM831X_SYSTEM_INTERRUPTS:
492 	case WM831X_INTERRUPT_STATUS_1:
493 	case WM831X_INTERRUPT_STATUS_2:
494 	case WM831X_INTERRUPT_STATUS_3:
495 	case WM831X_INTERRUPT_STATUS_4:
496 	case WM831X_INTERRUPT_STATUS_5:
497 	case WM831X_RTC_TIME_1:
498 	case WM831X_RTC_TIME_2:
499 	case WM831X_TOUCH_DATA_X:
500 	case WM831X_TOUCH_DATA_Y:
501 	case WM831X_TOUCH_DATA_Z:
502 	case WM831X_AUXADC_DATA:
503 	case WM831X_CHARGER_STATUS:
504 	case WM831X_DCDC_STATUS:
505 	case WM831X_LDO_STATUS:
506 	case WM831X_DCDC_UV_STATUS:
507 	case WM831X_LDO_UV_STATUS:
508 		return true;
509 	default:
510 		return false;
511 	}
512 }
513 
514 /**
515  * wm831x_reg_read: Read a single WM831x register.
516  *
517  * @wm831x: Device to read from.
518  * @reg: Register to read.
519  */
520 int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
521 {
522 	unsigned int val;
523 	int ret;
524 
525 	ret = regmap_read(wm831x->regmap, reg, &val);
526 
527 	if (ret < 0)
528 		return ret;
529 	else
530 		return val;
531 }
532 EXPORT_SYMBOL_GPL(wm831x_reg_read);
533 
534 /**
535  * wm831x_bulk_read: Read multiple WM831x registers
536  *
537  * @wm831x: Device to read from
538  * @reg: First register
539  * @count: Number of registers
540  * @buf: Buffer to fill.
541  */
542 int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
543 		     int count, u16 *buf)
544 {
545 	return regmap_bulk_read(wm831x->regmap, reg, buf, count);
546 }
547 EXPORT_SYMBOL_GPL(wm831x_bulk_read);
548 
549 static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
550 			int bytes, void *src)
551 {
552 	u16 *buf = src;
553 	int i, ret;
554 
555 	BUG_ON(bytes % 2);
556 	BUG_ON(bytes <= 0);
557 
558 	for (i = 0; i < bytes / 2; i++) {
559 		if (wm831x_reg_locked(wm831x, reg))
560 			return -EPERM;
561 
562 		dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
563 			 buf[i], reg + i, reg + i);
564 		ret = regmap_write(wm831x->regmap, reg + i, buf[i]);
565 		if (ret != 0)
566 			return ret;
567 	}
568 
569 	return 0;
570 }
571 
572 /**
573  * wm831x_reg_write: Write a single WM831x register.
574  *
575  * @wm831x: Device to write to.
576  * @reg: Register to write to.
577  * @val: Value to write.
578  */
579 int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg,
580 		     unsigned short val)
581 {
582 	int ret;
583 
584 	mutex_lock(&wm831x->io_lock);
585 
586 	ret = wm831x_write(wm831x, reg, 2, &val);
587 
588 	mutex_unlock(&wm831x->io_lock);
589 
590 	return ret;
591 }
592 EXPORT_SYMBOL_GPL(wm831x_reg_write);
593 
594 /**
595  * wm831x_set_bits: Set the value of a bitfield in a WM831x register
596  *
597  * @wm831x: Device to write to.
598  * @reg: Register to write to.
599  * @mask: Mask of bits to set.
600  * @val: Value to set (unshifted)
601  */
602 int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
603 		    unsigned short mask, unsigned short val)
604 {
605 	int ret;
606 
607 	mutex_lock(&wm831x->io_lock);
608 
609 	if (!wm831x_reg_locked(wm831x, reg))
610 		ret = regmap_update_bits(wm831x->regmap, reg, mask, val);
611 	else
612 		ret = -EPERM;
613 
614 	mutex_unlock(&wm831x->io_lock);
615 
616 	return ret;
617 }
618 EXPORT_SYMBOL_GPL(wm831x_set_bits);
619 
620 static struct resource wm831x_dcdc1_resources[] = {
621 	{
622 		.start = WM831X_DC1_CONTROL_1,
623 		.end   = WM831X_DC1_DVS_CONTROL,
624 		.flags = IORESOURCE_REG,
625 	},
626 	{
627 		.name  = "UV",
628 		.start = WM831X_IRQ_UV_DC1,
629 		.end   = WM831X_IRQ_UV_DC1,
630 		.flags = IORESOURCE_IRQ,
631 	},
632 	{
633 		.name  = "HC",
634 		.start = WM831X_IRQ_HC_DC1,
635 		.end   = WM831X_IRQ_HC_DC1,
636 		.flags = IORESOURCE_IRQ,
637 	},
638 };
639 
640 
641 static struct resource wm831x_dcdc2_resources[] = {
642 	{
643 		.start = WM831X_DC2_CONTROL_1,
644 		.end   = WM831X_DC2_DVS_CONTROL,
645 		.flags = IORESOURCE_REG,
646 	},
647 	{
648 		.name  = "UV",
649 		.start = WM831X_IRQ_UV_DC2,
650 		.end   = WM831X_IRQ_UV_DC2,
651 		.flags = IORESOURCE_IRQ,
652 	},
653 	{
654 		.name  = "HC",
655 		.start = WM831X_IRQ_HC_DC2,
656 		.end   = WM831X_IRQ_HC_DC2,
657 		.flags = IORESOURCE_IRQ,
658 	},
659 };
660 
661 static struct resource wm831x_dcdc3_resources[] = {
662 	{
663 		.start = WM831X_DC3_CONTROL_1,
664 		.end   = WM831X_DC3_SLEEP_CONTROL,
665 		.flags = IORESOURCE_REG,
666 	},
667 	{
668 		.name  = "UV",
669 		.start = WM831X_IRQ_UV_DC3,
670 		.end   = WM831X_IRQ_UV_DC3,
671 		.flags = IORESOURCE_IRQ,
672 	},
673 };
674 
675 static struct resource wm831x_dcdc4_resources[] = {
676 	{
677 		.start = WM831X_DC4_CONTROL,
678 		.end   = WM831X_DC4_SLEEP_CONTROL,
679 		.flags = IORESOURCE_REG,
680 	},
681 	{
682 		.name  = "UV",
683 		.start = WM831X_IRQ_UV_DC4,
684 		.end   = WM831X_IRQ_UV_DC4,
685 		.flags = IORESOURCE_IRQ,
686 	},
687 };
688 
689 static struct resource wm8320_dcdc4_buck_resources[] = {
690 	{
691 		.start = WM831X_DC4_CONTROL,
692 		.end   = WM832X_DC4_SLEEP_CONTROL,
693 		.flags = IORESOURCE_REG,
694 	},
695 	{
696 		.name  = "UV",
697 		.start = WM831X_IRQ_UV_DC4,
698 		.end   = WM831X_IRQ_UV_DC4,
699 		.flags = IORESOURCE_IRQ,
700 	},
701 };
702 
703 static struct resource wm831x_gpio_resources[] = {
704 	{
705 		.start = WM831X_IRQ_GPIO_1,
706 		.end   = WM831X_IRQ_GPIO_16,
707 		.flags = IORESOURCE_IRQ,
708 	},
709 };
710 
711 static struct resource wm831x_isink1_resources[] = {
712 	{
713 		.start = WM831X_CURRENT_SINK_1,
714 		.end   = WM831X_CURRENT_SINK_1,
715 		.flags = IORESOURCE_REG,
716 	},
717 	{
718 		.start = WM831X_IRQ_CS1,
719 		.end   = WM831X_IRQ_CS1,
720 		.flags = IORESOURCE_IRQ,
721 	},
722 };
723 
724 static struct resource wm831x_isink2_resources[] = {
725 	{
726 		.start = WM831X_CURRENT_SINK_2,
727 		.end   = WM831X_CURRENT_SINK_2,
728 		.flags = IORESOURCE_REG,
729 	},
730 	{
731 		.start = WM831X_IRQ_CS2,
732 		.end   = WM831X_IRQ_CS2,
733 		.flags = IORESOURCE_IRQ,
734 	},
735 };
736 
737 static struct resource wm831x_ldo1_resources[] = {
738 	{
739 		.start = WM831X_LDO1_CONTROL,
740 		.end   = WM831X_LDO1_SLEEP_CONTROL,
741 		.flags = IORESOURCE_REG,
742 	},
743 	{
744 		.name  = "UV",
745 		.start = WM831X_IRQ_UV_LDO1,
746 		.end   = WM831X_IRQ_UV_LDO1,
747 		.flags = IORESOURCE_IRQ,
748 	},
749 };
750 
751 static struct resource wm831x_ldo2_resources[] = {
752 	{
753 		.start = WM831X_LDO2_CONTROL,
754 		.end   = WM831X_LDO2_SLEEP_CONTROL,
755 		.flags = IORESOURCE_REG,
756 	},
757 	{
758 		.name  = "UV",
759 		.start = WM831X_IRQ_UV_LDO2,
760 		.end   = WM831X_IRQ_UV_LDO2,
761 		.flags = IORESOURCE_IRQ,
762 	},
763 };
764 
765 static struct resource wm831x_ldo3_resources[] = {
766 	{
767 		.start = WM831X_LDO3_CONTROL,
768 		.end   = WM831X_LDO3_SLEEP_CONTROL,
769 		.flags = IORESOURCE_REG,
770 	},
771 	{
772 		.name  = "UV",
773 		.start = WM831X_IRQ_UV_LDO3,
774 		.end   = WM831X_IRQ_UV_LDO3,
775 		.flags = IORESOURCE_IRQ,
776 	},
777 };
778 
779 static struct resource wm831x_ldo4_resources[] = {
780 	{
781 		.start = WM831X_LDO4_CONTROL,
782 		.end   = WM831X_LDO4_SLEEP_CONTROL,
783 		.flags = IORESOURCE_REG,
784 	},
785 	{
786 		.name  = "UV",
787 		.start = WM831X_IRQ_UV_LDO4,
788 		.end   = WM831X_IRQ_UV_LDO4,
789 		.flags = IORESOURCE_IRQ,
790 	},
791 };
792 
793 static struct resource wm831x_ldo5_resources[] = {
794 	{
795 		.start = WM831X_LDO5_CONTROL,
796 		.end   = WM831X_LDO5_SLEEP_CONTROL,
797 		.flags = IORESOURCE_REG,
798 	},
799 	{
800 		.name  = "UV",
801 		.start = WM831X_IRQ_UV_LDO5,
802 		.end   = WM831X_IRQ_UV_LDO5,
803 		.flags = IORESOURCE_IRQ,
804 	},
805 };
806 
807 static struct resource wm831x_ldo6_resources[] = {
808 	{
809 		.start = WM831X_LDO6_CONTROL,
810 		.end   = WM831X_LDO6_SLEEP_CONTROL,
811 		.flags = IORESOURCE_REG,
812 	},
813 	{
814 		.name  = "UV",
815 		.start = WM831X_IRQ_UV_LDO6,
816 		.end   = WM831X_IRQ_UV_LDO6,
817 		.flags = IORESOURCE_IRQ,
818 	},
819 };
820 
821 static struct resource wm831x_ldo7_resources[] = {
822 	{
823 		.start = WM831X_LDO7_CONTROL,
824 		.end   = WM831X_LDO7_SLEEP_CONTROL,
825 		.flags = IORESOURCE_REG,
826 	},
827 	{
828 		.name  = "UV",
829 		.start = WM831X_IRQ_UV_LDO7,
830 		.end   = WM831X_IRQ_UV_LDO7,
831 		.flags = IORESOURCE_IRQ,
832 	},
833 };
834 
835 static struct resource wm831x_ldo8_resources[] = {
836 	{
837 		.start = WM831X_LDO8_CONTROL,
838 		.end   = WM831X_LDO8_SLEEP_CONTROL,
839 		.flags = IORESOURCE_REG,
840 	},
841 	{
842 		.name  = "UV",
843 		.start = WM831X_IRQ_UV_LDO8,
844 		.end   = WM831X_IRQ_UV_LDO8,
845 		.flags = IORESOURCE_IRQ,
846 	},
847 };
848 
849 static struct resource wm831x_ldo9_resources[] = {
850 	{
851 		.start = WM831X_LDO9_CONTROL,
852 		.end   = WM831X_LDO9_SLEEP_CONTROL,
853 		.flags = IORESOURCE_REG,
854 	},
855 	{
856 		.name  = "UV",
857 		.start = WM831X_IRQ_UV_LDO9,
858 		.end   = WM831X_IRQ_UV_LDO9,
859 		.flags = IORESOURCE_IRQ,
860 	},
861 };
862 
863 static struct resource wm831x_ldo10_resources[] = {
864 	{
865 		.start = WM831X_LDO10_CONTROL,
866 		.end   = WM831X_LDO10_SLEEP_CONTROL,
867 		.flags = IORESOURCE_REG,
868 	},
869 	{
870 		.name  = "UV",
871 		.start = WM831X_IRQ_UV_LDO10,
872 		.end   = WM831X_IRQ_UV_LDO10,
873 		.flags = IORESOURCE_IRQ,
874 	},
875 };
876 
877 static struct resource wm831x_ldo11_resources[] = {
878 	{
879 		.start = WM831X_LDO11_ON_CONTROL,
880 		.end   = WM831X_LDO11_SLEEP_CONTROL,
881 		.flags = IORESOURCE_REG,
882 	},
883 };
884 
885 static struct resource wm831x_on_resources[] = {
886 	{
887 		.start = WM831X_IRQ_ON,
888 		.end   = WM831X_IRQ_ON,
889 		.flags = IORESOURCE_IRQ,
890 	},
891 };
892 
893 
894 static struct resource wm831x_power_resources[] = {
895 	{
896 		.name = "SYSLO",
897 		.start = WM831X_IRQ_PPM_SYSLO,
898 		.end   = WM831X_IRQ_PPM_SYSLO,
899 		.flags = IORESOURCE_IRQ,
900 	},
901 	{
902 		.name = "PWR SRC",
903 		.start = WM831X_IRQ_PPM_PWR_SRC,
904 		.end   = WM831X_IRQ_PPM_PWR_SRC,
905 		.flags = IORESOURCE_IRQ,
906 	},
907 	{
908 		.name = "USB CURR",
909 		.start = WM831X_IRQ_PPM_USB_CURR,
910 		.end   = WM831X_IRQ_PPM_USB_CURR,
911 		.flags = IORESOURCE_IRQ,
912 	},
913 	{
914 		.name = "BATT HOT",
915 		.start = WM831X_IRQ_CHG_BATT_HOT,
916 		.end   = WM831X_IRQ_CHG_BATT_HOT,
917 		.flags = IORESOURCE_IRQ,
918 	},
919 	{
920 		.name = "BATT COLD",
921 		.start = WM831X_IRQ_CHG_BATT_COLD,
922 		.end   = WM831X_IRQ_CHG_BATT_COLD,
923 		.flags = IORESOURCE_IRQ,
924 	},
925 	{
926 		.name = "BATT FAIL",
927 		.start = WM831X_IRQ_CHG_BATT_FAIL,
928 		.end   = WM831X_IRQ_CHG_BATT_FAIL,
929 		.flags = IORESOURCE_IRQ,
930 	},
931 	{
932 		.name = "OV",
933 		.start = WM831X_IRQ_CHG_OV,
934 		.end   = WM831X_IRQ_CHG_OV,
935 		.flags = IORESOURCE_IRQ,
936 	},
937 	{
938 		.name = "END",
939 		.start = WM831X_IRQ_CHG_END,
940 		.end   = WM831X_IRQ_CHG_END,
941 		.flags = IORESOURCE_IRQ,
942 	},
943 	{
944 		.name = "TO",
945 		.start = WM831X_IRQ_CHG_TO,
946 		.end   = WM831X_IRQ_CHG_TO,
947 		.flags = IORESOURCE_IRQ,
948 	},
949 	{
950 		.name = "MODE",
951 		.start = WM831X_IRQ_CHG_MODE,
952 		.end   = WM831X_IRQ_CHG_MODE,
953 		.flags = IORESOURCE_IRQ,
954 	},
955 	{
956 		.name = "START",
957 		.start = WM831X_IRQ_CHG_START,
958 		.end   = WM831X_IRQ_CHG_START,
959 		.flags = IORESOURCE_IRQ,
960 	},
961 };
962 
963 static struct resource wm831x_rtc_resources[] = {
964 	{
965 		.name = "PER",
966 		.start = WM831X_IRQ_RTC_PER,
967 		.end   = WM831X_IRQ_RTC_PER,
968 		.flags = IORESOURCE_IRQ,
969 	},
970 	{
971 		.name = "ALM",
972 		.start = WM831X_IRQ_RTC_ALM,
973 		.end   = WM831X_IRQ_RTC_ALM,
974 		.flags = IORESOURCE_IRQ,
975 	},
976 };
977 
978 static struct resource wm831x_status1_resources[] = {
979 	{
980 		.start = WM831X_STATUS_LED_1,
981 		.end   = WM831X_STATUS_LED_1,
982 		.flags = IORESOURCE_REG,
983 	},
984 };
985 
986 static struct resource wm831x_status2_resources[] = {
987 	{
988 		.start = WM831X_STATUS_LED_2,
989 		.end   = WM831X_STATUS_LED_2,
990 		.flags = IORESOURCE_REG,
991 	},
992 };
993 
994 static struct resource wm831x_touch_resources[] = {
995 	{
996 		.name = "TCHPD",
997 		.start = WM831X_IRQ_TCHPD,
998 		.end   = WM831X_IRQ_TCHPD,
999 		.flags = IORESOURCE_IRQ,
1000 	},
1001 	{
1002 		.name = "TCHDATA",
1003 		.start = WM831X_IRQ_TCHDATA,
1004 		.end   = WM831X_IRQ_TCHDATA,
1005 		.flags = IORESOURCE_IRQ,
1006 	},
1007 };
1008 
1009 static struct resource wm831x_wdt_resources[] = {
1010 	{
1011 		.start = WM831X_IRQ_WDOG_TO,
1012 		.end   = WM831X_IRQ_WDOG_TO,
1013 		.flags = IORESOURCE_IRQ,
1014 	},
1015 };
1016 
1017 static const struct mfd_cell wm8310_devs[] = {
1018 	{
1019 		.name = "wm831x-backup",
1020 	},
1021 	{
1022 		.name = "wm831x-buckv",
1023 		.id = 1,
1024 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1025 		.resources = wm831x_dcdc1_resources,
1026 	},
1027 	{
1028 		.name = "wm831x-buckv",
1029 		.id = 2,
1030 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1031 		.resources = wm831x_dcdc2_resources,
1032 	},
1033 	{
1034 		.name = "wm831x-buckp",
1035 		.id = 3,
1036 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1037 		.resources = wm831x_dcdc3_resources,
1038 	},
1039 	{
1040 		.name = "wm831x-boostp",
1041 		.id = 4,
1042 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1043 		.resources = wm831x_dcdc4_resources,
1044 	},
1045 	{
1046 		.name = "wm831x-clk",
1047 	},
1048 	{
1049 		.name = "wm831x-epe",
1050 		.id = 1,
1051 	},
1052 	{
1053 		.name = "wm831x-epe",
1054 		.id = 2,
1055 	},
1056 	{
1057 		.name = "wm831x-gpio",
1058 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1059 		.resources = wm831x_gpio_resources,
1060 	},
1061 	{
1062 		.name = "wm831x-hwmon",
1063 	},
1064 	{
1065 		.name = "wm831x-isink",
1066 		.id = 1,
1067 		.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1068 		.resources = wm831x_isink1_resources,
1069 	},
1070 	{
1071 		.name = "wm831x-isink",
1072 		.id = 2,
1073 		.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1074 		.resources = wm831x_isink2_resources,
1075 	},
1076 	{
1077 		.name = "wm831x-ldo",
1078 		.id = 1,
1079 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1080 		.resources = wm831x_ldo1_resources,
1081 	},
1082 	{
1083 		.name = "wm831x-ldo",
1084 		.id = 2,
1085 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1086 		.resources = wm831x_ldo2_resources,
1087 	},
1088 	{
1089 		.name = "wm831x-ldo",
1090 		.id = 3,
1091 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1092 		.resources = wm831x_ldo3_resources,
1093 	},
1094 	{
1095 		.name = "wm831x-ldo",
1096 		.id = 4,
1097 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1098 		.resources = wm831x_ldo4_resources,
1099 	},
1100 	{
1101 		.name = "wm831x-ldo",
1102 		.id = 5,
1103 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1104 		.resources = wm831x_ldo5_resources,
1105 	},
1106 	{
1107 		.name = "wm831x-ldo",
1108 		.id = 6,
1109 		.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1110 		.resources = wm831x_ldo6_resources,
1111 	},
1112 	{
1113 		.name = "wm831x-aldo",
1114 		.id = 7,
1115 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1116 		.resources = wm831x_ldo7_resources,
1117 	},
1118 	{
1119 		.name = "wm831x-aldo",
1120 		.id = 8,
1121 		.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1122 		.resources = wm831x_ldo8_resources,
1123 	},
1124 	{
1125 		.name = "wm831x-aldo",
1126 		.id = 9,
1127 		.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1128 		.resources = wm831x_ldo9_resources,
1129 	},
1130 	{
1131 		.name = "wm831x-aldo",
1132 		.id = 10,
1133 		.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1134 		.resources = wm831x_ldo10_resources,
1135 	},
1136 	{
1137 		.name = "wm831x-alive-ldo",
1138 		.id = 11,
1139 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1140 		.resources = wm831x_ldo11_resources,
1141 	},
1142 	{
1143 		.name = "wm831x-on",
1144 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
1145 		.resources = wm831x_on_resources,
1146 	},
1147 	{
1148 		.name = "wm831x-power",
1149 		.num_resources = ARRAY_SIZE(wm831x_power_resources),
1150 		.resources = wm831x_power_resources,
1151 	},
1152 	{
1153 		.name = "wm831x-status",
1154 		.id = 1,
1155 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
1156 		.resources = wm831x_status1_resources,
1157 	},
1158 	{
1159 		.name = "wm831x-status",
1160 		.id = 2,
1161 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
1162 		.resources = wm831x_status2_resources,
1163 	},
1164 	{
1165 		.name = "wm831x-watchdog",
1166 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1167 		.resources = wm831x_wdt_resources,
1168 	},
1169 };
1170 
1171 static const struct mfd_cell wm8311_devs[] = {
1172 	{
1173 		.name = "wm831x-backup",
1174 	},
1175 	{
1176 		.name = "wm831x-buckv",
1177 		.id = 1,
1178 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1179 		.resources = wm831x_dcdc1_resources,
1180 	},
1181 	{
1182 		.name = "wm831x-buckv",
1183 		.id = 2,
1184 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1185 		.resources = wm831x_dcdc2_resources,
1186 	},
1187 	{
1188 		.name = "wm831x-buckp",
1189 		.id = 3,
1190 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1191 		.resources = wm831x_dcdc3_resources,
1192 	},
1193 	{
1194 		.name = "wm831x-boostp",
1195 		.id = 4,
1196 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1197 		.resources = wm831x_dcdc4_resources,
1198 	},
1199 	{
1200 		.name = "wm831x-clk",
1201 	},
1202 	{
1203 		.name = "wm831x-epe",
1204 		.id = 1,
1205 	},
1206 	{
1207 		.name = "wm831x-epe",
1208 		.id = 2,
1209 	},
1210 	{
1211 		.name = "wm831x-gpio",
1212 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1213 		.resources = wm831x_gpio_resources,
1214 	},
1215 	{
1216 		.name = "wm831x-hwmon",
1217 	},
1218 	{
1219 		.name = "wm831x-isink",
1220 		.id = 1,
1221 		.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1222 		.resources = wm831x_isink1_resources,
1223 	},
1224 	{
1225 		.name = "wm831x-isink",
1226 		.id = 2,
1227 		.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1228 		.resources = wm831x_isink2_resources,
1229 	},
1230 	{
1231 		.name = "wm831x-ldo",
1232 		.id = 1,
1233 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1234 		.resources = wm831x_ldo1_resources,
1235 	},
1236 	{
1237 		.name = "wm831x-ldo",
1238 		.id = 2,
1239 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1240 		.resources = wm831x_ldo2_resources,
1241 	},
1242 	{
1243 		.name = "wm831x-ldo",
1244 		.id = 3,
1245 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1246 		.resources = wm831x_ldo3_resources,
1247 	},
1248 	{
1249 		.name = "wm831x-ldo",
1250 		.id = 4,
1251 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1252 		.resources = wm831x_ldo4_resources,
1253 	},
1254 	{
1255 		.name = "wm831x-ldo",
1256 		.id = 5,
1257 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1258 		.resources = wm831x_ldo5_resources,
1259 	},
1260 	{
1261 		.name = "wm831x-aldo",
1262 		.id = 7,
1263 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1264 		.resources = wm831x_ldo7_resources,
1265 	},
1266 	{
1267 		.name = "wm831x-alive-ldo",
1268 		.id = 11,
1269 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1270 		.resources = wm831x_ldo11_resources,
1271 	},
1272 	{
1273 		.name = "wm831x-on",
1274 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
1275 		.resources = wm831x_on_resources,
1276 	},
1277 	{
1278 		.name = "wm831x-power",
1279 		.num_resources = ARRAY_SIZE(wm831x_power_resources),
1280 		.resources = wm831x_power_resources,
1281 	},
1282 	{
1283 		.name = "wm831x-status",
1284 		.id = 1,
1285 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
1286 		.resources = wm831x_status1_resources,
1287 	},
1288 	{
1289 		.name = "wm831x-status",
1290 		.id = 2,
1291 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
1292 		.resources = wm831x_status2_resources,
1293 	},
1294 	{
1295 		.name = "wm831x-watchdog",
1296 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1297 		.resources = wm831x_wdt_resources,
1298 	},
1299 };
1300 
1301 static const struct mfd_cell wm8312_devs[] = {
1302 	{
1303 		.name = "wm831x-backup",
1304 	},
1305 	{
1306 		.name = "wm831x-buckv",
1307 		.id = 1,
1308 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1309 		.resources = wm831x_dcdc1_resources,
1310 	},
1311 	{
1312 		.name = "wm831x-buckv",
1313 		.id = 2,
1314 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1315 		.resources = wm831x_dcdc2_resources,
1316 	},
1317 	{
1318 		.name = "wm831x-buckp",
1319 		.id = 3,
1320 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1321 		.resources = wm831x_dcdc3_resources,
1322 	},
1323 	{
1324 		.name = "wm831x-boostp",
1325 		.id = 4,
1326 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1327 		.resources = wm831x_dcdc4_resources,
1328 	},
1329 	{
1330 		.name = "wm831x-clk",
1331 	},
1332 	{
1333 		.name = "wm831x-epe",
1334 		.id = 1,
1335 	},
1336 	{
1337 		.name = "wm831x-epe",
1338 		.id = 2,
1339 	},
1340 	{
1341 		.name = "wm831x-gpio",
1342 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1343 		.resources = wm831x_gpio_resources,
1344 	},
1345 	{
1346 		.name = "wm831x-hwmon",
1347 	},
1348 	{
1349 		.name = "wm831x-isink",
1350 		.id = 1,
1351 		.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1352 		.resources = wm831x_isink1_resources,
1353 	},
1354 	{
1355 		.name = "wm831x-isink",
1356 		.id = 2,
1357 		.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1358 		.resources = wm831x_isink2_resources,
1359 	},
1360 	{
1361 		.name = "wm831x-ldo",
1362 		.id = 1,
1363 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1364 		.resources = wm831x_ldo1_resources,
1365 	},
1366 	{
1367 		.name = "wm831x-ldo",
1368 		.id = 2,
1369 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1370 		.resources = wm831x_ldo2_resources,
1371 	},
1372 	{
1373 		.name = "wm831x-ldo",
1374 		.id = 3,
1375 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1376 		.resources = wm831x_ldo3_resources,
1377 	},
1378 	{
1379 		.name = "wm831x-ldo",
1380 		.id = 4,
1381 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1382 		.resources = wm831x_ldo4_resources,
1383 	},
1384 	{
1385 		.name = "wm831x-ldo",
1386 		.id = 5,
1387 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1388 		.resources = wm831x_ldo5_resources,
1389 	},
1390 	{
1391 		.name = "wm831x-ldo",
1392 		.id = 6,
1393 		.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1394 		.resources = wm831x_ldo6_resources,
1395 	},
1396 	{
1397 		.name = "wm831x-aldo",
1398 		.id = 7,
1399 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1400 		.resources = wm831x_ldo7_resources,
1401 	},
1402 	{
1403 		.name = "wm831x-aldo",
1404 		.id = 8,
1405 		.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1406 		.resources = wm831x_ldo8_resources,
1407 	},
1408 	{
1409 		.name = "wm831x-aldo",
1410 		.id = 9,
1411 		.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1412 		.resources = wm831x_ldo9_resources,
1413 	},
1414 	{
1415 		.name = "wm831x-aldo",
1416 		.id = 10,
1417 		.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1418 		.resources = wm831x_ldo10_resources,
1419 	},
1420 	{
1421 		.name = "wm831x-alive-ldo",
1422 		.id = 11,
1423 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1424 		.resources = wm831x_ldo11_resources,
1425 	},
1426 	{
1427 		.name = "wm831x-on",
1428 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
1429 		.resources = wm831x_on_resources,
1430 	},
1431 	{
1432 		.name = "wm831x-power",
1433 		.num_resources = ARRAY_SIZE(wm831x_power_resources),
1434 		.resources = wm831x_power_resources,
1435 	},
1436 	{
1437 		.name = "wm831x-status",
1438 		.id = 1,
1439 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
1440 		.resources = wm831x_status1_resources,
1441 	},
1442 	{
1443 		.name = "wm831x-status",
1444 		.id = 2,
1445 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
1446 		.resources = wm831x_status2_resources,
1447 	},
1448 	{
1449 		.name = "wm831x-watchdog",
1450 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1451 		.resources = wm831x_wdt_resources,
1452 	},
1453 };
1454 
1455 static const struct mfd_cell wm8320_devs[] = {
1456 	{
1457 		.name = "wm831x-backup",
1458 	},
1459 	{
1460 		.name = "wm831x-buckv",
1461 		.id = 1,
1462 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1463 		.resources = wm831x_dcdc1_resources,
1464 	},
1465 	{
1466 		.name = "wm831x-buckv",
1467 		.id = 2,
1468 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1469 		.resources = wm831x_dcdc2_resources,
1470 	},
1471 	{
1472 		.name = "wm831x-buckp",
1473 		.id = 3,
1474 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1475 		.resources = wm831x_dcdc3_resources,
1476 	},
1477 	{
1478 		.name = "wm831x-buckp",
1479 		.id = 4,
1480 		.num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
1481 		.resources = wm8320_dcdc4_buck_resources,
1482 	},
1483 	{
1484 		.name = "wm831x-clk",
1485 	},
1486 	{
1487 		.name = "wm831x-gpio",
1488 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1489 		.resources = wm831x_gpio_resources,
1490 	},
1491 	{
1492 		.name = "wm831x-hwmon",
1493 	},
1494 	{
1495 		.name = "wm831x-ldo",
1496 		.id = 1,
1497 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1498 		.resources = wm831x_ldo1_resources,
1499 	},
1500 	{
1501 		.name = "wm831x-ldo",
1502 		.id = 2,
1503 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1504 		.resources = wm831x_ldo2_resources,
1505 	},
1506 	{
1507 		.name = "wm831x-ldo",
1508 		.id = 3,
1509 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1510 		.resources = wm831x_ldo3_resources,
1511 	},
1512 	{
1513 		.name = "wm831x-ldo",
1514 		.id = 4,
1515 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1516 		.resources = wm831x_ldo4_resources,
1517 	},
1518 	{
1519 		.name = "wm831x-ldo",
1520 		.id = 5,
1521 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1522 		.resources = wm831x_ldo5_resources,
1523 	},
1524 	{
1525 		.name = "wm831x-ldo",
1526 		.id = 6,
1527 		.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1528 		.resources = wm831x_ldo6_resources,
1529 	},
1530 	{
1531 		.name = "wm831x-aldo",
1532 		.id = 7,
1533 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1534 		.resources = wm831x_ldo7_resources,
1535 	},
1536 	{
1537 		.name = "wm831x-aldo",
1538 		.id = 8,
1539 		.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1540 		.resources = wm831x_ldo8_resources,
1541 	},
1542 	{
1543 		.name = "wm831x-aldo",
1544 		.id = 9,
1545 		.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1546 		.resources = wm831x_ldo9_resources,
1547 	},
1548 	{
1549 		.name = "wm831x-aldo",
1550 		.id = 10,
1551 		.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1552 		.resources = wm831x_ldo10_resources,
1553 	},
1554 	{
1555 		.name = "wm831x-alive-ldo",
1556 		.id = 11,
1557 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1558 		.resources = wm831x_ldo11_resources,
1559 	},
1560 	{
1561 		.name = "wm831x-on",
1562 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
1563 		.resources = wm831x_on_resources,
1564 	},
1565 	{
1566 		.name = "wm831x-status",
1567 		.id = 1,
1568 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
1569 		.resources = wm831x_status1_resources,
1570 	},
1571 	{
1572 		.name = "wm831x-status",
1573 		.id = 2,
1574 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
1575 		.resources = wm831x_status2_resources,
1576 	},
1577 	{
1578 		.name = "wm831x-watchdog",
1579 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1580 		.resources = wm831x_wdt_resources,
1581 	},
1582 };
1583 
1584 static const struct mfd_cell touch_devs[] = {
1585 	{
1586 		.name = "wm831x-touch",
1587 		.num_resources = ARRAY_SIZE(wm831x_touch_resources),
1588 		.resources = wm831x_touch_resources,
1589 	},
1590 };
1591 
1592 static const struct mfd_cell rtc_devs[] = {
1593 	{
1594 		.name = "wm831x-rtc",
1595 		.num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1596 		.resources = wm831x_rtc_resources,
1597 	},
1598 };
1599 
1600 static const struct mfd_cell backlight_devs[] = {
1601 	{
1602 		.name = "wm831x-backlight",
1603 	},
1604 };
1605 
1606 struct regmap_config wm831x_regmap_config = {
1607 	.reg_bits = 16,
1608 	.val_bits = 16,
1609 
1610 	.cache_type = REGCACHE_RBTREE,
1611 
1612 	.max_register = WM831X_DBE_CHECK_DATA,
1613 	.readable_reg = wm831x_reg_readable,
1614 	.writeable_reg = wm831x_reg_writeable,
1615 	.volatile_reg = wm831x_reg_volatile,
1616 };
1617 EXPORT_SYMBOL_GPL(wm831x_regmap_config);
1618 
1619 const struct of_device_id wm831x_of_match[] = {
1620 	{ .compatible = "wlf,wm8310", .data = (void *)WM8310 },
1621 	{ .compatible = "wlf,wm8311", .data = (void *)WM8311 },
1622 	{ .compatible = "wlf,wm8312", .data = (void *)WM8312 },
1623 	{ .compatible = "wlf,wm8320", .data = (void *)WM8320 },
1624 	{ .compatible = "wlf,wm8321", .data = (void *)WM8321 },
1625 	{ .compatible = "wlf,wm8325", .data = (void *)WM8325 },
1626 	{ .compatible = "wlf,wm8326", .data = (void *)WM8326 },
1627 	{ },
1628 };
1629 EXPORT_SYMBOL_GPL(wm831x_of_match);
1630 
1631 /*
1632  * Instantiate the generic non-control parts of the device.
1633  */
1634 int wm831x_device_init(struct wm831x *wm831x, int irq)
1635 {
1636 	struct wm831x_pdata *pdata = &wm831x->pdata;
1637 	int rev, wm831x_num;
1638 	enum wm831x_parent parent;
1639 	int ret, i;
1640 
1641 	mutex_init(&wm831x->io_lock);
1642 	mutex_init(&wm831x->key_lock);
1643 	dev_set_drvdata(wm831x->dev, wm831x);
1644 
1645 	wm831x->soft_shutdown = pdata->soft_shutdown;
1646 
1647 	ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1648 	if (ret < 0) {
1649 		dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1650 		goto err;
1651 	}
1652 	switch (ret) {
1653 	case 0x6204:
1654 	case 0x6246:
1655 		break;
1656 	default:
1657 		dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1658 		ret = -EINVAL;
1659 		goto err;
1660 	}
1661 
1662 	ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1663 	if (ret < 0) {
1664 		dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1665 		goto err;
1666 	}
1667 	rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1668 
1669 	ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1670 	if (ret < 0) {
1671 		dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1672 		goto err;
1673 	}
1674 
1675 	/* Some engineering samples do not have the ID set, rely on
1676 	 * the device being registered correctly.
1677 	 */
1678 	if (ret == 0) {
1679 		dev_info(wm831x->dev, "Device is an engineering sample\n");
1680 		ret = wm831x->type;
1681 	}
1682 
1683 	switch (ret) {
1684 	case WM8310:
1685 		parent = WM8310;
1686 		wm831x->num_gpio = 16;
1687 		wm831x->charger_irq_wake = 1;
1688 		if (rev > 0) {
1689 			wm831x->has_gpio_ena = 1;
1690 			wm831x->has_cs_sts = 1;
1691 		}
1692 
1693 		dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
1694 		break;
1695 
1696 	case WM8311:
1697 		parent = WM8311;
1698 		wm831x->num_gpio = 16;
1699 		wm831x->charger_irq_wake = 1;
1700 		if (rev > 0) {
1701 			wm831x->has_gpio_ena = 1;
1702 			wm831x->has_cs_sts = 1;
1703 		}
1704 
1705 		dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
1706 		break;
1707 
1708 	case WM8312:
1709 		parent = WM8312;
1710 		wm831x->num_gpio = 16;
1711 		wm831x->charger_irq_wake = 1;
1712 		if (rev > 0) {
1713 			wm831x->has_gpio_ena = 1;
1714 			wm831x->has_cs_sts = 1;
1715 		}
1716 
1717 		dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
1718 		break;
1719 
1720 	case WM8320:
1721 		parent = WM8320;
1722 		wm831x->num_gpio = 12;
1723 		dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);
1724 		break;
1725 
1726 	case WM8321:
1727 		parent = WM8321;
1728 		wm831x->num_gpio = 12;
1729 		dev_info(wm831x->dev, "WM8321 revision %c\n", 'A' + rev);
1730 		break;
1731 
1732 	case WM8325:
1733 		parent = WM8325;
1734 		wm831x->num_gpio = 12;
1735 		dev_info(wm831x->dev, "WM8325 revision %c\n", 'A' + rev);
1736 		break;
1737 
1738 	case WM8326:
1739 		parent = WM8326;
1740 		wm831x->num_gpio = 12;
1741 		dev_info(wm831x->dev, "WM8326 revision %c\n", 'A' + rev);
1742 		break;
1743 
1744 	default:
1745 		dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1746 		ret = -EINVAL;
1747 		goto err;
1748 	}
1749 
1750 	/* This will need revisiting in future but is OK for all
1751 	 * current parts.
1752 	 */
1753 	if (parent != wm831x->type)
1754 		dev_warn(wm831x->dev, "Device was registered as a WM%x\n",
1755 			 wm831x->type);
1756 
1757 	/* Bootstrap the user key */
1758 	ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1759 	if (ret < 0) {
1760 		dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1761 		goto err;
1762 	}
1763 	if (ret != 0) {
1764 		dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1765 			 ret);
1766 		wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1767 	}
1768 	wm831x->locked = 1;
1769 
1770 	if (pdata->pre_init) {
1771 		ret = pdata->pre_init(wm831x);
1772 		if (ret != 0) {
1773 			dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1774 			goto err;
1775 		}
1776 	}
1777 
1778 	for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
1779 		if (!pdata->gpio_defaults[i])
1780 			continue;
1781 
1782 		wm831x_reg_write(wm831x,
1783 				 WM831X_GPIO1_CONTROL + i,
1784 				 pdata->gpio_defaults[i] & 0xffff);
1785 	}
1786 
1787 	/* Multiply by 10 as we have many subdevices of the same type */
1788 	if (pdata->wm831x_num)
1789 		wm831x_num = pdata->wm831x_num * 10;
1790 	else
1791 		wm831x_num = -1;
1792 
1793 	ret = wm831x_irq_init(wm831x, irq);
1794 	if (ret != 0)
1795 		goto err;
1796 
1797 	wm831x_auxadc_init(wm831x);
1798 
1799 	/* The core device is up, instantiate the subdevices. */
1800 	switch (parent) {
1801 	case WM8310:
1802 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1803 				      wm8310_devs, ARRAY_SIZE(wm8310_devs),
1804 				      NULL, 0, NULL);
1805 		break;
1806 
1807 	case WM8311:
1808 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1809 				      wm8311_devs, ARRAY_SIZE(wm8311_devs),
1810 				      NULL, 0, NULL);
1811 		if (!pdata->disable_touch)
1812 			mfd_add_devices(wm831x->dev, wm831x_num,
1813 					touch_devs, ARRAY_SIZE(touch_devs),
1814 					NULL, 0, NULL);
1815 		break;
1816 
1817 	case WM8312:
1818 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1819 				      wm8312_devs, ARRAY_SIZE(wm8312_devs),
1820 				      NULL, 0, NULL);
1821 		if (!pdata->disable_touch)
1822 			mfd_add_devices(wm831x->dev, wm831x_num,
1823 					touch_devs, ARRAY_SIZE(touch_devs),
1824 					NULL, 0, NULL);
1825 		break;
1826 
1827 	case WM8320:
1828 	case WM8321:
1829 	case WM8325:
1830 	case WM8326:
1831 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1832 				      wm8320_devs, ARRAY_SIZE(wm8320_devs),
1833 				      NULL, 0, NULL);
1834 		break;
1835 
1836 	default:
1837 		/* If this happens the bus probe function is buggy */
1838 		BUG();
1839 	}
1840 
1841 	if (ret != 0) {
1842 		dev_err(wm831x->dev, "Failed to add children\n");
1843 		goto err_irq;
1844 	}
1845 
1846 	/* The RTC can only be used if the 32.768kHz crystal is
1847 	 * enabled; this can't be controlled by software at runtime.
1848 	 */
1849 	ret = wm831x_reg_read(wm831x, WM831X_CLOCK_CONTROL_2);
1850 	if (ret < 0) {
1851 		dev_err(wm831x->dev, "Failed to read clock status: %d\n", ret);
1852 		goto err_irq;
1853 	}
1854 
1855 	if (ret & WM831X_XTAL_ENA) {
1856 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1857 				      rtc_devs, ARRAY_SIZE(rtc_devs),
1858 				      NULL, 0, NULL);
1859 		if (ret != 0) {
1860 			dev_err(wm831x->dev, "Failed to add RTC: %d\n", ret);
1861 			goto err_irq;
1862 		}
1863 	} else {
1864 		dev_info(wm831x->dev, "32.768kHz clock disabled, no RTC\n");
1865 	}
1866 
1867 	if (pdata->backlight) {
1868 		/* Treat errors as non-critical */
1869 		ret = mfd_add_devices(wm831x->dev, wm831x_num, backlight_devs,
1870 				      ARRAY_SIZE(backlight_devs), NULL,
1871 				      0, NULL);
1872 		if (ret < 0)
1873 			dev_err(wm831x->dev, "Failed to add backlight: %d\n",
1874 				ret);
1875 	}
1876 
1877 	wm831x_otp_init(wm831x);
1878 
1879 	if (pdata->post_init) {
1880 		ret = pdata->post_init(wm831x);
1881 		if (ret != 0) {
1882 			dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1883 			goto err_irq;
1884 		}
1885 	}
1886 
1887 	return 0;
1888 
1889 err_irq:
1890 	wm831x_irq_exit(wm831x);
1891 err:
1892 	mfd_remove_devices(wm831x->dev);
1893 	return ret;
1894 }
1895 
1896 int wm831x_device_suspend(struct wm831x *wm831x)
1897 {
1898 	int reg, mask;
1899 
1900 	/* If the charger IRQs are a wake source then make sure we ack
1901 	 * them even if they're not actively being used (eg, no power
1902 	 * driver or no IRQ line wired up) then acknowledge the
1903 	 * interrupts otherwise suspend won't last very long.
1904 	 */
1905 	if (wm831x->charger_irq_wake) {
1906 		reg = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_2_MASK);
1907 
1908 		mask = WM831X_CHG_BATT_HOT_EINT |
1909 			WM831X_CHG_BATT_COLD_EINT |
1910 			WM831X_CHG_BATT_FAIL_EINT |
1911 			WM831X_CHG_OV_EINT | WM831X_CHG_END_EINT |
1912 			WM831X_CHG_TO_EINT | WM831X_CHG_MODE_EINT |
1913 			WM831X_CHG_START_EINT;
1914 
1915 		/* If any of the interrupts are masked read the statuses */
1916 		if (reg & mask)
1917 			reg = wm831x_reg_read(wm831x,
1918 					      WM831X_INTERRUPT_STATUS_2);
1919 
1920 		if (reg & mask) {
1921 			dev_info(wm831x->dev,
1922 				 "Acknowledging masked charger IRQs: %x\n",
1923 				 reg & mask);
1924 			wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_2,
1925 					 reg & mask);
1926 		}
1927 	}
1928 
1929 	return 0;
1930 }
1931 
1932 void wm831x_device_shutdown(struct wm831x *wm831x)
1933 {
1934 	if (wm831x->soft_shutdown) {
1935 		dev_info(wm831x->dev, "Initiating shutdown...\n");
1936 		wm831x_set_bits(wm831x, WM831X_POWER_STATE, WM831X_CHIP_ON, 0);
1937 	}
1938 }
1939 EXPORT_SYMBOL_GPL(wm831x_device_shutdown);
1940