xref: /linux/drivers/mfd/wm831x-core.c (revision b7019ac550eb3916f34d79db583e9b7ea2524afa) 
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * wm831x-core.c  --  Device access for Wolfson WM831x PMICs
4  *
5  * Copyright 2009 Wolfson Microelectronics PLC.
6  *
7  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8  */
9 
10 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/export.h>
13 #include <linux/bcd.h>
14 #include <linux/delay.h>
15 #include <linux/mfd/core.h>
16 #include <linux/slab.h>
17 #include <linux/err.h>
18 #include <linux/of.h>
19 #include <linux/of_device.h>
20 
21 #include <linux/mfd/wm831x/core.h>
22 #include <linux/mfd/wm831x/pdata.h>
23 #include <linux/mfd/wm831x/irq.h>
24 #include <linux/mfd/wm831x/auxadc.h>
25 #include <linux/mfd/wm831x/otp.h>
26 #include <linux/mfd/wm831x/pmu.h>
27 #include <linux/mfd/wm831x/regulator.h>
28 
29 /* Current settings - values are 2*2^(reg_val/4) microamps.  These are
30  * exported since they are used by multiple drivers.
31  */
32 const unsigned int wm831x_isinkv_values[WM831X_ISINK_MAX_ISEL + 1] = {
33 	2,
34 	2,
35 	3,
36 	3,
37 	4,
38 	5,
39 	6,
40 	7,
41 	8,
42 	10,
43 	11,
44 	13,
45 	16,
46 	19,
47 	23,
48 	27,
49 	32,
50 	38,
51 	45,
52 	54,
53 	64,
54 	76,
55 	91,
56 	108,
57 	128,
58 	152,
59 	181,
60 	215,
61 	256,
62 	304,
63 	362,
64 	431,
65 	512,
66 	609,
67 	724,
68 	861,
69 	1024,
70 	1218,
71 	1448,
72 	1722,
73 	2048,
74 	2435,
75 	2896,
76 	3444,
77 	4096,
78 	4871,
79 	5793,
80 	6889,
81 	8192,
82 	9742,
83 	11585,
84 	13777,
85 	16384,
86 	19484,
87 	23170,
88 	27554,
89 };
90 EXPORT_SYMBOL_GPL(wm831x_isinkv_values);
91 
92 static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg)
93 {
94 	if (!wm831x->locked)
95 		return 0;
96 
97 	switch (reg) {
98 	case WM831X_WATCHDOG:
99 	case WM831X_DC4_CONTROL:
100 	case WM831X_ON_PIN_CONTROL:
101 	case WM831X_BACKUP_CHARGER_CONTROL:
102 	case WM831X_CHARGER_CONTROL_1:
103 	case WM831X_CHARGER_CONTROL_2:
104 		return 1;
105 
106 	default:
107 		return 0;
108 	}
109 }
110 
111 /**
112  * wm831x_reg_unlock: Unlock user keyed registers
113  *
114  * The WM831x has a user key preventing writes to particularly
115  * critical registers.  This function locks those registers,
116  * allowing writes to them.
117  */
118 void wm831x_reg_lock(struct wm831x *wm831x)
119 {
120 	int ret;
121 
122 	ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
123 	if (ret == 0) {
124 		dev_vdbg(wm831x->dev, "Registers locked\n");
125 
126 		mutex_lock(&wm831x->io_lock);
127 		WARN_ON(wm831x->locked);
128 		wm831x->locked = 1;
129 		mutex_unlock(&wm831x->io_lock);
130 	} else {
131 		dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret);
132 	}
133 
134 }
135 EXPORT_SYMBOL_GPL(wm831x_reg_lock);
136 
137 /**
138  * wm831x_reg_unlock: Unlock user keyed registers
139  *
140  * The WM831x has a user key preventing writes to particularly
141  * critical registers.  This function locks those registers,
142  * preventing spurious writes.
143  */
144 int wm831x_reg_unlock(struct wm831x *wm831x)
145 {
146 	int ret;
147 
148 	/* 0x9716 is the value required to unlock the registers */
149 	ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716);
150 	if (ret == 0) {
151 		dev_vdbg(wm831x->dev, "Registers unlocked\n");
152 
153 		mutex_lock(&wm831x->io_lock);
154 		WARN_ON(!wm831x->locked);
155 		wm831x->locked = 0;
156 		mutex_unlock(&wm831x->io_lock);
157 	}
158 
159 	return ret;
160 }
161 EXPORT_SYMBOL_GPL(wm831x_reg_unlock);
162 
163 static bool wm831x_reg_readable(struct device *dev, unsigned int reg)
164 {
165 	switch (reg) {
166 	case WM831X_RESET_ID:
167 	case WM831X_REVISION:
168 	case WM831X_PARENT_ID:
169 	case WM831X_SYSVDD_CONTROL:
170 	case WM831X_THERMAL_MONITORING:
171 	case WM831X_POWER_STATE:
172 	case WM831X_WATCHDOG:
173 	case WM831X_ON_PIN_CONTROL:
174 	case WM831X_RESET_CONTROL:
175 	case WM831X_CONTROL_INTERFACE:
176 	case WM831X_SECURITY_KEY:
177 	case WM831X_SOFTWARE_SCRATCH:
178 	case WM831X_OTP_CONTROL:
179 	case WM831X_GPIO_LEVEL:
180 	case WM831X_SYSTEM_STATUS:
181 	case WM831X_ON_SOURCE:
182 	case WM831X_OFF_SOURCE:
183 	case WM831X_SYSTEM_INTERRUPTS:
184 	case WM831X_INTERRUPT_STATUS_1:
185 	case WM831X_INTERRUPT_STATUS_2:
186 	case WM831X_INTERRUPT_STATUS_3:
187 	case WM831X_INTERRUPT_STATUS_4:
188 	case WM831X_INTERRUPT_STATUS_5:
189 	case WM831X_IRQ_CONFIG:
190 	case WM831X_SYSTEM_INTERRUPTS_MASK:
191 	case WM831X_INTERRUPT_STATUS_1_MASK:
192 	case WM831X_INTERRUPT_STATUS_2_MASK:
193 	case WM831X_INTERRUPT_STATUS_3_MASK:
194 	case WM831X_INTERRUPT_STATUS_4_MASK:
195 	case WM831X_INTERRUPT_STATUS_5_MASK:
196 	case WM831X_RTC_WRITE_COUNTER:
197 	case WM831X_RTC_TIME_1:
198 	case WM831X_RTC_TIME_2:
199 	case WM831X_RTC_ALARM_1:
200 	case WM831X_RTC_ALARM_2:
201 	case WM831X_RTC_CONTROL:
202 	case WM831X_RTC_TRIM:
203 	case WM831X_TOUCH_CONTROL_1:
204 	case WM831X_TOUCH_CONTROL_2:
205 	case WM831X_TOUCH_DATA_X:
206 	case WM831X_TOUCH_DATA_Y:
207 	case WM831X_TOUCH_DATA_Z:
208 	case WM831X_AUXADC_DATA:
209 	case WM831X_AUXADC_CONTROL:
210 	case WM831X_AUXADC_SOURCE:
211 	case WM831X_COMPARATOR_CONTROL:
212 	case WM831X_COMPARATOR_1:
213 	case WM831X_COMPARATOR_2:
214 	case WM831X_COMPARATOR_3:
215 	case WM831X_COMPARATOR_4:
216 	case WM831X_GPIO1_CONTROL:
217 	case WM831X_GPIO2_CONTROL:
218 	case WM831X_GPIO3_CONTROL:
219 	case WM831X_GPIO4_CONTROL:
220 	case WM831X_GPIO5_CONTROL:
221 	case WM831X_GPIO6_CONTROL:
222 	case WM831X_GPIO7_CONTROL:
223 	case WM831X_GPIO8_CONTROL:
224 	case WM831X_GPIO9_CONTROL:
225 	case WM831X_GPIO10_CONTROL:
226 	case WM831X_GPIO11_CONTROL:
227 	case WM831X_GPIO12_CONTROL:
228 	case WM831X_GPIO13_CONTROL:
229 	case WM831X_GPIO14_CONTROL:
230 	case WM831X_GPIO15_CONTROL:
231 	case WM831X_GPIO16_CONTROL:
232 	case WM831X_CHARGER_CONTROL_1:
233 	case WM831X_CHARGER_CONTROL_2:
234 	case WM831X_CHARGER_STATUS:
235 	case WM831X_BACKUP_CHARGER_CONTROL:
236 	case WM831X_STATUS_LED_1:
237 	case WM831X_STATUS_LED_2:
238 	case WM831X_CURRENT_SINK_1:
239 	case WM831X_CURRENT_SINK_2:
240 	case WM831X_DCDC_ENABLE:
241 	case WM831X_LDO_ENABLE:
242 	case WM831X_DCDC_STATUS:
243 	case WM831X_LDO_STATUS:
244 	case WM831X_DCDC_UV_STATUS:
245 	case WM831X_LDO_UV_STATUS:
246 	case WM831X_DC1_CONTROL_1:
247 	case WM831X_DC1_CONTROL_2:
248 	case WM831X_DC1_ON_CONFIG:
249 	case WM831X_DC1_SLEEP_CONTROL:
250 	case WM831X_DC1_DVS_CONTROL:
251 	case WM831X_DC2_CONTROL_1:
252 	case WM831X_DC2_CONTROL_2:
253 	case WM831X_DC2_ON_CONFIG:
254 	case WM831X_DC2_SLEEP_CONTROL:
255 	case WM831X_DC2_DVS_CONTROL:
256 	case WM831X_DC3_CONTROL_1:
257 	case WM831X_DC3_CONTROL_2:
258 	case WM831X_DC3_ON_CONFIG:
259 	case WM831X_DC3_SLEEP_CONTROL:
260 	case WM831X_DC4_CONTROL:
261 	case WM831X_DC4_SLEEP_CONTROL:
262 	case WM831X_EPE1_CONTROL:
263 	case WM831X_EPE2_CONTROL:
264 	case WM831X_LDO1_CONTROL:
265 	case WM831X_LDO1_ON_CONTROL:
266 	case WM831X_LDO1_SLEEP_CONTROL:
267 	case WM831X_LDO2_CONTROL:
268 	case WM831X_LDO2_ON_CONTROL:
269 	case WM831X_LDO2_SLEEP_CONTROL:
270 	case WM831X_LDO3_CONTROL:
271 	case WM831X_LDO3_ON_CONTROL:
272 	case WM831X_LDO3_SLEEP_CONTROL:
273 	case WM831X_LDO4_CONTROL:
274 	case WM831X_LDO4_ON_CONTROL:
275 	case WM831X_LDO4_SLEEP_CONTROL:
276 	case WM831X_LDO5_CONTROL:
277 	case WM831X_LDO5_ON_CONTROL:
278 	case WM831X_LDO5_SLEEP_CONTROL:
279 	case WM831X_LDO6_CONTROL:
280 	case WM831X_LDO6_ON_CONTROL:
281 	case WM831X_LDO6_SLEEP_CONTROL:
282 	case WM831X_LDO7_CONTROL:
283 	case WM831X_LDO7_ON_CONTROL:
284 	case WM831X_LDO7_SLEEP_CONTROL:
285 	case WM831X_LDO8_CONTROL:
286 	case WM831X_LDO8_ON_CONTROL:
287 	case WM831X_LDO8_SLEEP_CONTROL:
288 	case WM831X_LDO9_CONTROL:
289 	case WM831X_LDO9_ON_CONTROL:
290 	case WM831X_LDO9_SLEEP_CONTROL:
291 	case WM831X_LDO10_CONTROL:
292 	case WM831X_LDO10_ON_CONTROL:
293 	case WM831X_LDO10_SLEEP_CONTROL:
294 	case WM831X_LDO11_ON_CONTROL:
295 	case WM831X_LDO11_SLEEP_CONTROL:
296 	case WM831X_POWER_GOOD_SOURCE_1:
297 	case WM831X_POWER_GOOD_SOURCE_2:
298 	case WM831X_CLOCK_CONTROL_1:
299 	case WM831X_CLOCK_CONTROL_2:
300 	case WM831X_FLL_CONTROL_1:
301 	case WM831X_FLL_CONTROL_2:
302 	case WM831X_FLL_CONTROL_3:
303 	case WM831X_FLL_CONTROL_4:
304 	case WM831X_FLL_CONTROL_5:
305 	case WM831X_UNIQUE_ID_1:
306 	case WM831X_UNIQUE_ID_2:
307 	case WM831X_UNIQUE_ID_3:
308 	case WM831X_UNIQUE_ID_4:
309 	case WM831X_UNIQUE_ID_5:
310 	case WM831X_UNIQUE_ID_6:
311 	case WM831X_UNIQUE_ID_7:
312 	case WM831X_UNIQUE_ID_8:
313 	case WM831X_FACTORY_OTP_ID:
314 	case WM831X_FACTORY_OTP_1:
315 	case WM831X_FACTORY_OTP_2:
316 	case WM831X_FACTORY_OTP_3:
317 	case WM831X_FACTORY_OTP_4:
318 	case WM831X_FACTORY_OTP_5:
319 	case WM831X_CUSTOMER_OTP_ID:
320 	case WM831X_DC1_OTP_CONTROL:
321 	case WM831X_DC2_OTP_CONTROL:
322 	case WM831X_DC3_OTP_CONTROL:
323 	case WM831X_LDO1_2_OTP_CONTROL:
324 	case WM831X_LDO3_4_OTP_CONTROL:
325 	case WM831X_LDO5_6_OTP_CONTROL:
326 	case WM831X_LDO7_8_OTP_CONTROL:
327 	case WM831X_LDO9_10_OTP_CONTROL:
328 	case WM831X_LDO11_EPE_CONTROL:
329 	case WM831X_GPIO1_OTP_CONTROL:
330 	case WM831X_GPIO2_OTP_CONTROL:
331 	case WM831X_GPIO3_OTP_CONTROL:
332 	case WM831X_GPIO4_OTP_CONTROL:
333 	case WM831X_GPIO5_OTP_CONTROL:
334 	case WM831X_GPIO6_OTP_CONTROL:
335 	case WM831X_DBE_CHECK_DATA:
336 		return true;
337 	default:
338 		return false;
339 	}
340 }
341 
342 static bool wm831x_reg_writeable(struct device *dev, unsigned int reg)
343 {
344 	struct wm831x *wm831x = dev_get_drvdata(dev);
345 
346 	if (wm831x_reg_locked(wm831x, reg))
347 		return false;
348 
349 	switch (reg) {
350 	case WM831X_SYSVDD_CONTROL:
351 	case WM831X_THERMAL_MONITORING:
352 	case WM831X_POWER_STATE:
353 	case WM831X_WATCHDOG:
354 	case WM831X_ON_PIN_CONTROL:
355 	case WM831X_RESET_CONTROL:
356 	case WM831X_CONTROL_INTERFACE:
357 	case WM831X_SECURITY_KEY:
358 	case WM831X_SOFTWARE_SCRATCH:
359 	case WM831X_OTP_CONTROL:
360 	case WM831X_GPIO_LEVEL:
361 	case WM831X_INTERRUPT_STATUS_1:
362 	case WM831X_INTERRUPT_STATUS_2:
363 	case WM831X_INTERRUPT_STATUS_3:
364 	case WM831X_INTERRUPT_STATUS_4:
365 	case WM831X_INTERRUPT_STATUS_5:
366 	case WM831X_IRQ_CONFIG:
367 	case WM831X_SYSTEM_INTERRUPTS_MASK:
368 	case WM831X_INTERRUPT_STATUS_1_MASK:
369 	case WM831X_INTERRUPT_STATUS_2_MASK:
370 	case WM831X_INTERRUPT_STATUS_3_MASK:
371 	case WM831X_INTERRUPT_STATUS_4_MASK:
372 	case WM831X_INTERRUPT_STATUS_5_MASK:
373 	case WM831X_RTC_TIME_1:
374 	case WM831X_RTC_TIME_2:
375 	case WM831X_RTC_ALARM_1:
376 	case WM831X_RTC_ALARM_2:
377 	case WM831X_RTC_CONTROL:
378 	case WM831X_RTC_TRIM:
379 	case WM831X_TOUCH_CONTROL_1:
380 	case WM831X_TOUCH_CONTROL_2:
381 	case WM831X_AUXADC_CONTROL:
382 	case WM831X_AUXADC_SOURCE:
383 	case WM831X_COMPARATOR_CONTROL:
384 	case WM831X_COMPARATOR_1:
385 	case WM831X_COMPARATOR_2:
386 	case WM831X_COMPARATOR_3:
387 	case WM831X_COMPARATOR_4:
388 	case WM831X_GPIO1_CONTROL:
389 	case WM831X_GPIO2_CONTROL:
390 	case WM831X_GPIO3_CONTROL:
391 	case WM831X_GPIO4_CONTROL:
392 	case WM831X_GPIO5_CONTROL:
393 	case WM831X_GPIO6_CONTROL:
394 	case WM831X_GPIO7_CONTROL:
395 	case WM831X_GPIO8_CONTROL:
396 	case WM831X_GPIO9_CONTROL:
397 	case WM831X_GPIO10_CONTROL:
398 	case WM831X_GPIO11_CONTROL:
399 	case WM831X_GPIO12_CONTROL:
400 	case WM831X_GPIO13_CONTROL:
401 	case WM831X_GPIO14_CONTROL:
402 	case WM831X_GPIO15_CONTROL:
403 	case WM831X_GPIO16_CONTROL:
404 	case WM831X_CHARGER_CONTROL_1:
405 	case WM831X_CHARGER_CONTROL_2:
406 	case WM831X_CHARGER_STATUS:
407 	case WM831X_BACKUP_CHARGER_CONTROL:
408 	case WM831X_STATUS_LED_1:
409 	case WM831X_STATUS_LED_2:
410 	case WM831X_CURRENT_SINK_1:
411 	case WM831X_CURRENT_SINK_2:
412 	case WM831X_DCDC_ENABLE:
413 	case WM831X_LDO_ENABLE:
414 	case WM831X_DC1_CONTROL_1:
415 	case WM831X_DC1_CONTROL_2:
416 	case WM831X_DC1_ON_CONFIG:
417 	case WM831X_DC1_SLEEP_CONTROL:
418 	case WM831X_DC1_DVS_CONTROL:
419 	case WM831X_DC2_CONTROL_1:
420 	case WM831X_DC2_CONTROL_2:
421 	case WM831X_DC2_ON_CONFIG:
422 	case WM831X_DC2_SLEEP_CONTROL:
423 	case WM831X_DC2_DVS_CONTROL:
424 	case WM831X_DC3_CONTROL_1:
425 	case WM831X_DC3_CONTROL_2:
426 	case WM831X_DC3_ON_CONFIG:
427 	case WM831X_DC3_SLEEP_CONTROL:
428 	case WM831X_DC4_CONTROL:
429 	case WM831X_DC4_SLEEP_CONTROL:
430 	case WM831X_EPE1_CONTROL:
431 	case WM831X_EPE2_CONTROL:
432 	case WM831X_LDO1_CONTROL:
433 	case WM831X_LDO1_ON_CONTROL:
434 	case WM831X_LDO1_SLEEP_CONTROL:
435 	case WM831X_LDO2_CONTROL:
436 	case WM831X_LDO2_ON_CONTROL:
437 	case WM831X_LDO2_SLEEP_CONTROL:
438 	case WM831X_LDO3_CONTROL:
439 	case WM831X_LDO3_ON_CONTROL:
440 	case WM831X_LDO3_SLEEP_CONTROL:
441 	case WM831X_LDO4_CONTROL:
442 	case WM831X_LDO4_ON_CONTROL:
443 	case WM831X_LDO4_SLEEP_CONTROL:
444 	case WM831X_LDO5_CONTROL:
445 	case WM831X_LDO5_ON_CONTROL:
446 	case WM831X_LDO5_SLEEP_CONTROL:
447 	case WM831X_LDO6_CONTROL:
448 	case WM831X_LDO6_ON_CONTROL:
449 	case WM831X_LDO6_SLEEP_CONTROL:
450 	case WM831X_LDO7_CONTROL:
451 	case WM831X_LDO7_ON_CONTROL:
452 	case WM831X_LDO7_SLEEP_CONTROL:
453 	case WM831X_LDO8_CONTROL:
454 	case WM831X_LDO8_ON_CONTROL:
455 	case WM831X_LDO8_SLEEP_CONTROL:
456 	case WM831X_LDO9_CONTROL:
457 	case WM831X_LDO9_ON_CONTROL:
458 	case WM831X_LDO9_SLEEP_CONTROL:
459 	case WM831X_LDO10_CONTROL:
460 	case WM831X_LDO10_ON_CONTROL:
461 	case WM831X_LDO10_SLEEP_CONTROL:
462 	case WM831X_LDO11_ON_CONTROL:
463 	case WM831X_LDO11_SLEEP_CONTROL:
464 	case WM831X_POWER_GOOD_SOURCE_1:
465 	case WM831X_POWER_GOOD_SOURCE_2:
466 	case WM831X_CLOCK_CONTROL_1:
467 	case WM831X_CLOCK_CONTROL_2:
468 	case WM831X_FLL_CONTROL_1:
469 	case WM831X_FLL_CONTROL_2:
470 	case WM831X_FLL_CONTROL_3:
471 	case WM831X_FLL_CONTROL_4:
472 	case WM831X_FLL_CONTROL_5:
473 		return true;
474 	default:
475 		return false;
476 	}
477 }
478 
479 static bool wm831x_reg_volatile(struct device *dev, unsigned int reg)
480 {
481 	switch (reg) {
482 	case WM831X_SYSTEM_STATUS:
483 	case WM831X_ON_SOURCE:
484 	case WM831X_OFF_SOURCE:
485 	case WM831X_GPIO_LEVEL:
486 	case WM831X_SYSTEM_INTERRUPTS:
487 	case WM831X_INTERRUPT_STATUS_1:
488 	case WM831X_INTERRUPT_STATUS_2:
489 	case WM831X_INTERRUPT_STATUS_3:
490 	case WM831X_INTERRUPT_STATUS_4:
491 	case WM831X_INTERRUPT_STATUS_5:
492 	case WM831X_RTC_TIME_1:
493 	case WM831X_RTC_TIME_2:
494 	case WM831X_TOUCH_DATA_X:
495 	case WM831X_TOUCH_DATA_Y:
496 	case WM831X_TOUCH_DATA_Z:
497 	case WM831X_AUXADC_DATA:
498 	case WM831X_CHARGER_STATUS:
499 	case WM831X_DCDC_STATUS:
500 	case WM831X_LDO_STATUS:
501 	case WM831X_DCDC_UV_STATUS:
502 	case WM831X_LDO_UV_STATUS:
503 		return true;
504 	default:
505 		return false;
506 	}
507 }
508 
509 /**
510  * wm831x_reg_read: Read a single WM831x register.
511  *
512  * @wm831x: Device to read from.
513  * @reg: Register to read.
514  */
515 int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
516 {
517 	unsigned int val;
518 	int ret;
519 
520 	ret = regmap_read(wm831x->regmap, reg, &val);
521 
522 	if (ret < 0)
523 		return ret;
524 	else
525 		return val;
526 }
527 EXPORT_SYMBOL_GPL(wm831x_reg_read);
528 
529 /**
530  * wm831x_bulk_read: Read multiple WM831x registers
531  *
532  * @wm831x: Device to read from
533  * @reg: First register
534  * @count: Number of registers
535  * @buf: Buffer to fill.
536  */
537 int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
538 		     int count, u16 *buf)
539 {
540 	return regmap_bulk_read(wm831x->regmap, reg, buf, count);
541 }
542 EXPORT_SYMBOL_GPL(wm831x_bulk_read);
543 
544 static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
545 			int bytes, void *src)
546 {
547 	u16 *buf = src;
548 	int i, ret;
549 
550 	BUG_ON(bytes % 2);
551 	BUG_ON(bytes <= 0);
552 
553 	for (i = 0; i < bytes / 2; i++) {
554 		if (wm831x_reg_locked(wm831x, reg))
555 			return -EPERM;
556 
557 		dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
558 			 buf[i], reg + i, reg + i);
559 		ret = regmap_write(wm831x->regmap, reg + i, buf[i]);
560 		if (ret != 0)
561 			return ret;
562 	}
563 
564 	return 0;
565 }
566 
567 /**
568  * wm831x_reg_write: Write a single WM831x register.
569  *
570  * @wm831x: Device to write to.
571  * @reg: Register to write to.
572  * @val: Value to write.
573  */
574 int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg,
575 		     unsigned short val)
576 {
577 	int ret;
578 
579 	mutex_lock(&wm831x->io_lock);
580 
581 	ret = wm831x_write(wm831x, reg, 2, &val);
582 
583 	mutex_unlock(&wm831x->io_lock);
584 
585 	return ret;
586 }
587 EXPORT_SYMBOL_GPL(wm831x_reg_write);
588 
589 /**
590  * wm831x_set_bits: Set the value of a bitfield in a WM831x register
591  *
592  * @wm831x: Device to write to.
593  * @reg: Register to write to.
594  * @mask: Mask of bits to set.
595  * @val: Value to set (unshifted)
596  */
597 int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
598 		    unsigned short mask, unsigned short val)
599 {
600 	int ret;
601 
602 	mutex_lock(&wm831x->io_lock);
603 
604 	if (!wm831x_reg_locked(wm831x, reg))
605 		ret = regmap_update_bits(wm831x->regmap, reg, mask, val);
606 	else
607 		ret = -EPERM;
608 
609 	mutex_unlock(&wm831x->io_lock);
610 
611 	return ret;
612 }
613 EXPORT_SYMBOL_GPL(wm831x_set_bits);
614 
615 static struct resource wm831x_dcdc1_resources[] = {
616 	{
617 		.start = WM831X_DC1_CONTROL_1,
618 		.end   = WM831X_DC1_DVS_CONTROL,
619 		.flags = IORESOURCE_REG,
620 	},
621 	{
622 		.name  = "UV",
623 		.start = WM831X_IRQ_UV_DC1,
624 		.end   = WM831X_IRQ_UV_DC1,
625 		.flags = IORESOURCE_IRQ,
626 	},
627 	{
628 		.name  = "HC",
629 		.start = WM831X_IRQ_HC_DC1,
630 		.end   = WM831X_IRQ_HC_DC1,
631 		.flags = IORESOURCE_IRQ,
632 	},
633 };
634 
635 
636 static struct resource wm831x_dcdc2_resources[] = {
637 	{
638 		.start = WM831X_DC2_CONTROL_1,
639 		.end   = WM831X_DC2_DVS_CONTROL,
640 		.flags = IORESOURCE_REG,
641 	},
642 	{
643 		.name  = "UV",
644 		.start = WM831X_IRQ_UV_DC2,
645 		.end   = WM831X_IRQ_UV_DC2,
646 		.flags = IORESOURCE_IRQ,
647 	},
648 	{
649 		.name  = "HC",
650 		.start = WM831X_IRQ_HC_DC2,
651 		.end   = WM831X_IRQ_HC_DC2,
652 		.flags = IORESOURCE_IRQ,
653 	},
654 };
655 
656 static struct resource wm831x_dcdc3_resources[] = {
657 	{
658 		.start = WM831X_DC3_CONTROL_1,
659 		.end   = WM831X_DC3_SLEEP_CONTROL,
660 		.flags = IORESOURCE_REG,
661 	},
662 	{
663 		.name  = "UV",
664 		.start = WM831X_IRQ_UV_DC3,
665 		.end   = WM831X_IRQ_UV_DC3,
666 		.flags = IORESOURCE_IRQ,
667 	},
668 };
669 
670 static struct resource wm831x_dcdc4_resources[] = {
671 	{
672 		.start = WM831X_DC4_CONTROL,
673 		.end   = WM831X_DC4_SLEEP_CONTROL,
674 		.flags = IORESOURCE_REG,
675 	},
676 	{
677 		.name  = "UV",
678 		.start = WM831X_IRQ_UV_DC4,
679 		.end   = WM831X_IRQ_UV_DC4,
680 		.flags = IORESOURCE_IRQ,
681 	},
682 };
683 
684 static struct resource wm8320_dcdc4_buck_resources[] = {
685 	{
686 		.start = WM831X_DC4_CONTROL,
687 		.end   = WM832X_DC4_SLEEP_CONTROL,
688 		.flags = IORESOURCE_REG,
689 	},
690 	{
691 		.name  = "UV",
692 		.start = WM831X_IRQ_UV_DC4,
693 		.end   = WM831X_IRQ_UV_DC4,
694 		.flags = IORESOURCE_IRQ,
695 	},
696 };
697 
698 static struct resource wm831x_gpio_resources[] = {
699 	{
700 		.start = WM831X_IRQ_GPIO_1,
701 		.end   = WM831X_IRQ_GPIO_16,
702 		.flags = IORESOURCE_IRQ,
703 	},
704 };
705 
706 static struct resource wm831x_isink1_resources[] = {
707 	{
708 		.start = WM831X_CURRENT_SINK_1,
709 		.end   = WM831X_CURRENT_SINK_1,
710 		.flags = IORESOURCE_REG,
711 	},
712 	{
713 		.start = WM831X_IRQ_CS1,
714 		.end   = WM831X_IRQ_CS1,
715 		.flags = IORESOURCE_IRQ,
716 	},
717 };
718 
719 static struct resource wm831x_isink2_resources[] = {
720 	{
721 		.start = WM831X_CURRENT_SINK_2,
722 		.end   = WM831X_CURRENT_SINK_2,
723 		.flags = IORESOURCE_REG,
724 	},
725 	{
726 		.start = WM831X_IRQ_CS2,
727 		.end   = WM831X_IRQ_CS2,
728 		.flags = IORESOURCE_IRQ,
729 	},
730 };
731 
732 static struct resource wm831x_ldo1_resources[] = {
733 	{
734 		.start = WM831X_LDO1_CONTROL,
735 		.end   = WM831X_LDO1_SLEEP_CONTROL,
736 		.flags = IORESOURCE_REG,
737 	},
738 	{
739 		.name  = "UV",
740 		.start = WM831X_IRQ_UV_LDO1,
741 		.end   = WM831X_IRQ_UV_LDO1,
742 		.flags = IORESOURCE_IRQ,
743 	},
744 };
745 
746 static struct resource wm831x_ldo2_resources[] = {
747 	{
748 		.start = WM831X_LDO2_CONTROL,
749 		.end   = WM831X_LDO2_SLEEP_CONTROL,
750 		.flags = IORESOURCE_REG,
751 	},
752 	{
753 		.name  = "UV",
754 		.start = WM831X_IRQ_UV_LDO2,
755 		.end   = WM831X_IRQ_UV_LDO2,
756 		.flags = IORESOURCE_IRQ,
757 	},
758 };
759 
760 static struct resource wm831x_ldo3_resources[] = {
761 	{
762 		.start = WM831X_LDO3_CONTROL,
763 		.end   = WM831X_LDO3_SLEEP_CONTROL,
764 		.flags = IORESOURCE_REG,
765 	},
766 	{
767 		.name  = "UV",
768 		.start = WM831X_IRQ_UV_LDO3,
769 		.end   = WM831X_IRQ_UV_LDO3,
770 		.flags = IORESOURCE_IRQ,
771 	},
772 };
773 
774 static struct resource wm831x_ldo4_resources[] = {
775 	{
776 		.start = WM831X_LDO4_CONTROL,
777 		.end   = WM831X_LDO4_SLEEP_CONTROL,
778 		.flags = IORESOURCE_REG,
779 	},
780 	{
781 		.name  = "UV",
782 		.start = WM831X_IRQ_UV_LDO4,
783 		.end   = WM831X_IRQ_UV_LDO4,
784 		.flags = IORESOURCE_IRQ,
785 	},
786 };
787 
788 static struct resource wm831x_ldo5_resources[] = {
789 	{
790 		.start = WM831X_LDO5_CONTROL,
791 		.end   = WM831X_LDO5_SLEEP_CONTROL,
792 		.flags = IORESOURCE_REG,
793 	},
794 	{
795 		.name  = "UV",
796 		.start = WM831X_IRQ_UV_LDO5,
797 		.end   = WM831X_IRQ_UV_LDO5,
798 		.flags = IORESOURCE_IRQ,
799 	},
800 };
801 
802 static struct resource wm831x_ldo6_resources[] = {
803 	{
804 		.start = WM831X_LDO6_CONTROL,
805 		.end   = WM831X_LDO6_SLEEP_CONTROL,
806 		.flags = IORESOURCE_REG,
807 	},
808 	{
809 		.name  = "UV",
810 		.start = WM831X_IRQ_UV_LDO6,
811 		.end   = WM831X_IRQ_UV_LDO6,
812 		.flags = IORESOURCE_IRQ,
813 	},
814 };
815 
816 static struct resource wm831x_ldo7_resources[] = {
817 	{
818 		.start = WM831X_LDO7_CONTROL,
819 		.end   = WM831X_LDO7_SLEEP_CONTROL,
820 		.flags = IORESOURCE_REG,
821 	},
822 	{
823 		.name  = "UV",
824 		.start = WM831X_IRQ_UV_LDO7,
825 		.end   = WM831X_IRQ_UV_LDO7,
826 		.flags = IORESOURCE_IRQ,
827 	},
828 };
829 
830 static struct resource wm831x_ldo8_resources[] = {
831 	{
832 		.start = WM831X_LDO8_CONTROL,
833 		.end   = WM831X_LDO8_SLEEP_CONTROL,
834 		.flags = IORESOURCE_REG,
835 	},
836 	{
837 		.name  = "UV",
838 		.start = WM831X_IRQ_UV_LDO8,
839 		.end   = WM831X_IRQ_UV_LDO8,
840 		.flags = IORESOURCE_IRQ,
841 	},
842 };
843 
844 static struct resource wm831x_ldo9_resources[] = {
845 	{
846 		.start = WM831X_LDO9_CONTROL,
847 		.end   = WM831X_LDO9_SLEEP_CONTROL,
848 		.flags = IORESOURCE_REG,
849 	},
850 	{
851 		.name  = "UV",
852 		.start = WM831X_IRQ_UV_LDO9,
853 		.end   = WM831X_IRQ_UV_LDO9,
854 		.flags = IORESOURCE_IRQ,
855 	},
856 };
857 
858 static struct resource wm831x_ldo10_resources[] = {
859 	{
860 		.start = WM831X_LDO10_CONTROL,
861 		.end   = WM831X_LDO10_SLEEP_CONTROL,
862 		.flags = IORESOURCE_REG,
863 	},
864 	{
865 		.name  = "UV",
866 		.start = WM831X_IRQ_UV_LDO10,
867 		.end   = WM831X_IRQ_UV_LDO10,
868 		.flags = IORESOURCE_IRQ,
869 	},
870 };
871 
872 static struct resource wm831x_ldo11_resources[] = {
873 	{
874 		.start = WM831X_LDO11_ON_CONTROL,
875 		.end   = WM831X_LDO11_SLEEP_CONTROL,
876 		.flags = IORESOURCE_REG,
877 	},
878 };
879 
880 static struct resource wm831x_on_resources[] = {
881 	{
882 		.start = WM831X_IRQ_ON,
883 		.end   = WM831X_IRQ_ON,
884 		.flags = IORESOURCE_IRQ,
885 	},
886 };
887 
888 
889 static struct resource wm831x_power_resources[] = {
890 	{
891 		.name = "SYSLO",
892 		.start = WM831X_IRQ_PPM_SYSLO,
893 		.end   = WM831X_IRQ_PPM_SYSLO,
894 		.flags = IORESOURCE_IRQ,
895 	},
896 	{
897 		.name = "PWR SRC",
898 		.start = WM831X_IRQ_PPM_PWR_SRC,
899 		.end   = WM831X_IRQ_PPM_PWR_SRC,
900 		.flags = IORESOURCE_IRQ,
901 	},
902 	{
903 		.name = "USB CURR",
904 		.start = WM831X_IRQ_PPM_USB_CURR,
905 		.end   = WM831X_IRQ_PPM_USB_CURR,
906 		.flags = IORESOURCE_IRQ,
907 	},
908 	{
909 		.name = "BATT HOT",
910 		.start = WM831X_IRQ_CHG_BATT_HOT,
911 		.end   = WM831X_IRQ_CHG_BATT_HOT,
912 		.flags = IORESOURCE_IRQ,
913 	},
914 	{
915 		.name = "BATT COLD",
916 		.start = WM831X_IRQ_CHG_BATT_COLD,
917 		.end   = WM831X_IRQ_CHG_BATT_COLD,
918 		.flags = IORESOURCE_IRQ,
919 	},
920 	{
921 		.name = "BATT FAIL",
922 		.start = WM831X_IRQ_CHG_BATT_FAIL,
923 		.end   = WM831X_IRQ_CHG_BATT_FAIL,
924 		.flags = IORESOURCE_IRQ,
925 	},
926 	{
927 		.name = "OV",
928 		.start = WM831X_IRQ_CHG_OV,
929 		.end   = WM831X_IRQ_CHG_OV,
930 		.flags = IORESOURCE_IRQ,
931 	},
932 	{
933 		.name = "END",
934 		.start = WM831X_IRQ_CHG_END,
935 		.end   = WM831X_IRQ_CHG_END,
936 		.flags = IORESOURCE_IRQ,
937 	},
938 	{
939 		.name = "TO",
940 		.start = WM831X_IRQ_CHG_TO,
941 		.end   = WM831X_IRQ_CHG_TO,
942 		.flags = IORESOURCE_IRQ,
943 	},
944 	{
945 		.name = "MODE",
946 		.start = WM831X_IRQ_CHG_MODE,
947 		.end   = WM831X_IRQ_CHG_MODE,
948 		.flags = IORESOURCE_IRQ,
949 	},
950 	{
951 		.name = "START",
952 		.start = WM831X_IRQ_CHG_START,
953 		.end   = WM831X_IRQ_CHG_START,
954 		.flags = IORESOURCE_IRQ,
955 	},
956 };
957 
958 static struct resource wm831x_rtc_resources[] = {
959 	{
960 		.name = "PER",
961 		.start = WM831X_IRQ_RTC_PER,
962 		.end   = WM831X_IRQ_RTC_PER,
963 		.flags = IORESOURCE_IRQ,
964 	},
965 	{
966 		.name = "ALM",
967 		.start = WM831X_IRQ_RTC_ALM,
968 		.end   = WM831X_IRQ_RTC_ALM,
969 		.flags = IORESOURCE_IRQ,
970 	},
971 };
972 
973 static struct resource wm831x_status1_resources[] = {
974 	{
975 		.start = WM831X_STATUS_LED_1,
976 		.end   = WM831X_STATUS_LED_1,
977 		.flags = IORESOURCE_REG,
978 	},
979 };
980 
981 static struct resource wm831x_status2_resources[] = {
982 	{
983 		.start = WM831X_STATUS_LED_2,
984 		.end   = WM831X_STATUS_LED_2,
985 		.flags = IORESOURCE_REG,
986 	},
987 };
988 
989 static struct resource wm831x_touch_resources[] = {
990 	{
991 		.name = "TCHPD",
992 		.start = WM831X_IRQ_TCHPD,
993 		.end   = WM831X_IRQ_TCHPD,
994 		.flags = IORESOURCE_IRQ,
995 	},
996 	{
997 		.name = "TCHDATA",
998 		.start = WM831X_IRQ_TCHDATA,
999 		.end   = WM831X_IRQ_TCHDATA,
1000 		.flags = IORESOURCE_IRQ,
1001 	},
1002 };
1003 
1004 static struct resource wm831x_wdt_resources[] = {
1005 	{
1006 		.start = WM831X_IRQ_WDOG_TO,
1007 		.end   = WM831X_IRQ_WDOG_TO,
1008 		.flags = IORESOURCE_IRQ,
1009 	},
1010 };
1011 
1012 static const struct mfd_cell wm8310_devs[] = {
1013 	{
1014 		.name = "wm831x-backup",
1015 	},
1016 	{
1017 		.name = "wm831x-buckv",
1018 		.id = 1,
1019 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1020 		.resources = wm831x_dcdc1_resources,
1021 	},
1022 	{
1023 		.name = "wm831x-buckv",
1024 		.id = 2,
1025 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1026 		.resources = wm831x_dcdc2_resources,
1027 	},
1028 	{
1029 		.name = "wm831x-buckp",
1030 		.id = 3,
1031 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1032 		.resources = wm831x_dcdc3_resources,
1033 	},
1034 	{
1035 		.name = "wm831x-boostp",
1036 		.id = 4,
1037 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1038 		.resources = wm831x_dcdc4_resources,
1039 	},
1040 	{
1041 		.name = "wm831x-clk",
1042 	},
1043 	{
1044 		.name = "wm831x-epe",
1045 		.id = 1,
1046 	},
1047 	{
1048 		.name = "wm831x-epe",
1049 		.id = 2,
1050 	},
1051 	{
1052 		.name = "wm831x-gpio",
1053 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1054 		.resources = wm831x_gpio_resources,
1055 	},
1056 	{
1057 		.name = "wm831x-hwmon",
1058 	},
1059 	{
1060 		.name = "wm831x-isink",
1061 		.id = 1,
1062 		.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1063 		.resources = wm831x_isink1_resources,
1064 	},
1065 	{
1066 		.name = "wm831x-isink",
1067 		.id = 2,
1068 		.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1069 		.resources = wm831x_isink2_resources,
1070 	},
1071 	{
1072 		.name = "wm831x-ldo",
1073 		.id = 1,
1074 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1075 		.resources = wm831x_ldo1_resources,
1076 	},
1077 	{
1078 		.name = "wm831x-ldo",
1079 		.id = 2,
1080 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1081 		.resources = wm831x_ldo2_resources,
1082 	},
1083 	{
1084 		.name = "wm831x-ldo",
1085 		.id = 3,
1086 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1087 		.resources = wm831x_ldo3_resources,
1088 	},
1089 	{
1090 		.name = "wm831x-ldo",
1091 		.id = 4,
1092 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1093 		.resources = wm831x_ldo4_resources,
1094 	},
1095 	{
1096 		.name = "wm831x-ldo",
1097 		.id = 5,
1098 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1099 		.resources = wm831x_ldo5_resources,
1100 	},
1101 	{
1102 		.name = "wm831x-ldo",
1103 		.id = 6,
1104 		.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1105 		.resources = wm831x_ldo6_resources,
1106 	},
1107 	{
1108 		.name = "wm831x-aldo",
1109 		.id = 7,
1110 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1111 		.resources = wm831x_ldo7_resources,
1112 	},
1113 	{
1114 		.name = "wm831x-aldo",
1115 		.id = 8,
1116 		.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1117 		.resources = wm831x_ldo8_resources,
1118 	},
1119 	{
1120 		.name = "wm831x-aldo",
1121 		.id = 9,
1122 		.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1123 		.resources = wm831x_ldo9_resources,
1124 	},
1125 	{
1126 		.name = "wm831x-aldo",
1127 		.id = 10,
1128 		.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1129 		.resources = wm831x_ldo10_resources,
1130 	},
1131 	{
1132 		.name = "wm831x-alive-ldo",
1133 		.id = 11,
1134 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1135 		.resources = wm831x_ldo11_resources,
1136 	},
1137 	{
1138 		.name = "wm831x-on",
1139 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
1140 		.resources = wm831x_on_resources,
1141 	},
1142 	{
1143 		.name = "wm831x-power",
1144 		.num_resources = ARRAY_SIZE(wm831x_power_resources),
1145 		.resources = wm831x_power_resources,
1146 	},
1147 	{
1148 		.name = "wm831x-status",
1149 		.id = 1,
1150 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
1151 		.resources = wm831x_status1_resources,
1152 	},
1153 	{
1154 		.name = "wm831x-status",
1155 		.id = 2,
1156 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
1157 		.resources = wm831x_status2_resources,
1158 	},
1159 	{
1160 		.name = "wm831x-watchdog",
1161 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1162 		.resources = wm831x_wdt_resources,
1163 	},
1164 };
1165 
1166 static const struct mfd_cell wm8311_devs[] = {
1167 	{
1168 		.name = "wm831x-backup",
1169 	},
1170 	{
1171 		.name = "wm831x-buckv",
1172 		.id = 1,
1173 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1174 		.resources = wm831x_dcdc1_resources,
1175 	},
1176 	{
1177 		.name = "wm831x-buckv",
1178 		.id = 2,
1179 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1180 		.resources = wm831x_dcdc2_resources,
1181 	},
1182 	{
1183 		.name = "wm831x-buckp",
1184 		.id = 3,
1185 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1186 		.resources = wm831x_dcdc3_resources,
1187 	},
1188 	{
1189 		.name = "wm831x-boostp",
1190 		.id = 4,
1191 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1192 		.resources = wm831x_dcdc4_resources,
1193 	},
1194 	{
1195 		.name = "wm831x-clk",
1196 	},
1197 	{
1198 		.name = "wm831x-epe",
1199 		.id = 1,
1200 	},
1201 	{
1202 		.name = "wm831x-epe",
1203 		.id = 2,
1204 	},
1205 	{
1206 		.name = "wm831x-gpio",
1207 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1208 		.resources = wm831x_gpio_resources,
1209 	},
1210 	{
1211 		.name = "wm831x-hwmon",
1212 	},
1213 	{
1214 		.name = "wm831x-isink",
1215 		.id = 1,
1216 		.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1217 		.resources = wm831x_isink1_resources,
1218 	},
1219 	{
1220 		.name = "wm831x-isink",
1221 		.id = 2,
1222 		.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1223 		.resources = wm831x_isink2_resources,
1224 	},
1225 	{
1226 		.name = "wm831x-ldo",
1227 		.id = 1,
1228 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1229 		.resources = wm831x_ldo1_resources,
1230 	},
1231 	{
1232 		.name = "wm831x-ldo",
1233 		.id = 2,
1234 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1235 		.resources = wm831x_ldo2_resources,
1236 	},
1237 	{
1238 		.name = "wm831x-ldo",
1239 		.id = 3,
1240 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1241 		.resources = wm831x_ldo3_resources,
1242 	},
1243 	{
1244 		.name = "wm831x-ldo",
1245 		.id = 4,
1246 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1247 		.resources = wm831x_ldo4_resources,
1248 	},
1249 	{
1250 		.name = "wm831x-ldo",
1251 		.id = 5,
1252 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1253 		.resources = wm831x_ldo5_resources,
1254 	},
1255 	{
1256 		.name = "wm831x-aldo",
1257 		.id = 7,
1258 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1259 		.resources = wm831x_ldo7_resources,
1260 	},
1261 	{
1262 		.name = "wm831x-alive-ldo",
1263 		.id = 11,
1264 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1265 		.resources = wm831x_ldo11_resources,
1266 	},
1267 	{
1268 		.name = "wm831x-on",
1269 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
1270 		.resources = wm831x_on_resources,
1271 	},
1272 	{
1273 		.name = "wm831x-power",
1274 		.num_resources = ARRAY_SIZE(wm831x_power_resources),
1275 		.resources = wm831x_power_resources,
1276 	},
1277 	{
1278 		.name = "wm831x-status",
1279 		.id = 1,
1280 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
1281 		.resources = wm831x_status1_resources,
1282 	},
1283 	{
1284 		.name = "wm831x-status",
1285 		.id = 2,
1286 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
1287 		.resources = wm831x_status2_resources,
1288 	},
1289 	{
1290 		.name = "wm831x-watchdog",
1291 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1292 		.resources = wm831x_wdt_resources,
1293 	},
1294 };
1295 
1296 static const struct mfd_cell wm8312_devs[] = {
1297 	{
1298 		.name = "wm831x-backup",
1299 	},
1300 	{
1301 		.name = "wm831x-buckv",
1302 		.id = 1,
1303 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1304 		.resources = wm831x_dcdc1_resources,
1305 	},
1306 	{
1307 		.name = "wm831x-buckv",
1308 		.id = 2,
1309 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1310 		.resources = wm831x_dcdc2_resources,
1311 	},
1312 	{
1313 		.name = "wm831x-buckp",
1314 		.id = 3,
1315 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1316 		.resources = wm831x_dcdc3_resources,
1317 	},
1318 	{
1319 		.name = "wm831x-boostp",
1320 		.id = 4,
1321 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1322 		.resources = wm831x_dcdc4_resources,
1323 	},
1324 	{
1325 		.name = "wm831x-clk",
1326 	},
1327 	{
1328 		.name = "wm831x-epe",
1329 		.id = 1,
1330 	},
1331 	{
1332 		.name = "wm831x-epe",
1333 		.id = 2,
1334 	},
1335 	{
1336 		.name = "wm831x-gpio",
1337 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1338 		.resources = wm831x_gpio_resources,
1339 	},
1340 	{
1341 		.name = "wm831x-hwmon",
1342 	},
1343 	{
1344 		.name = "wm831x-isink",
1345 		.id = 1,
1346 		.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1347 		.resources = wm831x_isink1_resources,
1348 	},
1349 	{
1350 		.name = "wm831x-isink",
1351 		.id = 2,
1352 		.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1353 		.resources = wm831x_isink2_resources,
1354 	},
1355 	{
1356 		.name = "wm831x-ldo",
1357 		.id = 1,
1358 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1359 		.resources = wm831x_ldo1_resources,
1360 	},
1361 	{
1362 		.name = "wm831x-ldo",
1363 		.id = 2,
1364 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1365 		.resources = wm831x_ldo2_resources,
1366 	},
1367 	{
1368 		.name = "wm831x-ldo",
1369 		.id = 3,
1370 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1371 		.resources = wm831x_ldo3_resources,
1372 	},
1373 	{
1374 		.name = "wm831x-ldo",
1375 		.id = 4,
1376 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1377 		.resources = wm831x_ldo4_resources,
1378 	},
1379 	{
1380 		.name = "wm831x-ldo",
1381 		.id = 5,
1382 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1383 		.resources = wm831x_ldo5_resources,
1384 	},
1385 	{
1386 		.name = "wm831x-ldo",
1387 		.id = 6,
1388 		.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1389 		.resources = wm831x_ldo6_resources,
1390 	},
1391 	{
1392 		.name = "wm831x-aldo",
1393 		.id = 7,
1394 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1395 		.resources = wm831x_ldo7_resources,
1396 	},
1397 	{
1398 		.name = "wm831x-aldo",
1399 		.id = 8,
1400 		.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1401 		.resources = wm831x_ldo8_resources,
1402 	},
1403 	{
1404 		.name = "wm831x-aldo",
1405 		.id = 9,
1406 		.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1407 		.resources = wm831x_ldo9_resources,
1408 	},
1409 	{
1410 		.name = "wm831x-aldo",
1411 		.id = 10,
1412 		.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1413 		.resources = wm831x_ldo10_resources,
1414 	},
1415 	{
1416 		.name = "wm831x-alive-ldo",
1417 		.id = 11,
1418 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1419 		.resources = wm831x_ldo11_resources,
1420 	},
1421 	{
1422 		.name = "wm831x-on",
1423 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
1424 		.resources = wm831x_on_resources,
1425 	},
1426 	{
1427 		.name = "wm831x-power",
1428 		.num_resources = ARRAY_SIZE(wm831x_power_resources),
1429 		.resources = wm831x_power_resources,
1430 	},
1431 	{
1432 		.name = "wm831x-status",
1433 		.id = 1,
1434 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
1435 		.resources = wm831x_status1_resources,
1436 	},
1437 	{
1438 		.name = "wm831x-status",
1439 		.id = 2,
1440 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
1441 		.resources = wm831x_status2_resources,
1442 	},
1443 	{
1444 		.name = "wm831x-watchdog",
1445 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1446 		.resources = wm831x_wdt_resources,
1447 	},
1448 };
1449 
1450 static const struct mfd_cell wm8320_devs[] = {
1451 	{
1452 		.name = "wm831x-backup",
1453 	},
1454 	{
1455 		.name = "wm831x-buckv",
1456 		.id = 1,
1457 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1458 		.resources = wm831x_dcdc1_resources,
1459 	},
1460 	{
1461 		.name = "wm831x-buckv",
1462 		.id = 2,
1463 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1464 		.resources = wm831x_dcdc2_resources,
1465 	},
1466 	{
1467 		.name = "wm831x-buckp",
1468 		.id = 3,
1469 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1470 		.resources = wm831x_dcdc3_resources,
1471 	},
1472 	{
1473 		.name = "wm831x-buckp",
1474 		.id = 4,
1475 		.num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
1476 		.resources = wm8320_dcdc4_buck_resources,
1477 	},
1478 	{
1479 		.name = "wm831x-clk",
1480 	},
1481 	{
1482 		.name = "wm831x-gpio",
1483 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1484 		.resources = wm831x_gpio_resources,
1485 	},
1486 	{
1487 		.name = "wm831x-hwmon",
1488 	},
1489 	{
1490 		.name = "wm831x-ldo",
1491 		.id = 1,
1492 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1493 		.resources = wm831x_ldo1_resources,
1494 	},
1495 	{
1496 		.name = "wm831x-ldo",
1497 		.id = 2,
1498 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1499 		.resources = wm831x_ldo2_resources,
1500 	},
1501 	{
1502 		.name = "wm831x-ldo",
1503 		.id = 3,
1504 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1505 		.resources = wm831x_ldo3_resources,
1506 	},
1507 	{
1508 		.name = "wm831x-ldo",
1509 		.id = 4,
1510 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1511 		.resources = wm831x_ldo4_resources,
1512 	},
1513 	{
1514 		.name = "wm831x-ldo",
1515 		.id = 5,
1516 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1517 		.resources = wm831x_ldo5_resources,
1518 	},
1519 	{
1520 		.name = "wm831x-ldo",
1521 		.id = 6,
1522 		.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1523 		.resources = wm831x_ldo6_resources,
1524 	},
1525 	{
1526 		.name = "wm831x-aldo",
1527 		.id = 7,
1528 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1529 		.resources = wm831x_ldo7_resources,
1530 	},
1531 	{
1532 		.name = "wm831x-aldo",
1533 		.id = 8,
1534 		.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1535 		.resources = wm831x_ldo8_resources,
1536 	},
1537 	{
1538 		.name = "wm831x-aldo",
1539 		.id = 9,
1540 		.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1541 		.resources = wm831x_ldo9_resources,
1542 	},
1543 	{
1544 		.name = "wm831x-aldo",
1545 		.id = 10,
1546 		.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1547 		.resources = wm831x_ldo10_resources,
1548 	},
1549 	{
1550 		.name = "wm831x-alive-ldo",
1551 		.id = 11,
1552 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1553 		.resources = wm831x_ldo11_resources,
1554 	},
1555 	{
1556 		.name = "wm831x-on",
1557 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
1558 		.resources = wm831x_on_resources,
1559 	},
1560 	{
1561 		.name = "wm831x-status",
1562 		.id = 1,
1563 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
1564 		.resources = wm831x_status1_resources,
1565 	},
1566 	{
1567 		.name = "wm831x-status",
1568 		.id = 2,
1569 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
1570 		.resources = wm831x_status2_resources,
1571 	},
1572 	{
1573 		.name = "wm831x-watchdog",
1574 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1575 		.resources = wm831x_wdt_resources,
1576 	},
1577 };
1578 
1579 static const struct mfd_cell touch_devs[] = {
1580 	{
1581 		.name = "wm831x-touch",
1582 		.num_resources = ARRAY_SIZE(wm831x_touch_resources),
1583 		.resources = wm831x_touch_resources,
1584 	},
1585 };
1586 
1587 static const struct mfd_cell rtc_devs[] = {
1588 	{
1589 		.name = "wm831x-rtc",
1590 		.num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1591 		.resources = wm831x_rtc_resources,
1592 	},
1593 };
1594 
1595 static const struct mfd_cell backlight_devs[] = {
1596 	{
1597 		.name = "wm831x-backlight",
1598 	},
1599 };
1600 
1601 struct regmap_config wm831x_regmap_config = {
1602 	.reg_bits = 16,
1603 	.val_bits = 16,
1604 
1605 	.cache_type = REGCACHE_RBTREE,
1606 
1607 	.max_register = WM831X_DBE_CHECK_DATA,
1608 	.readable_reg = wm831x_reg_readable,
1609 	.writeable_reg = wm831x_reg_writeable,
1610 	.volatile_reg = wm831x_reg_volatile,
1611 };
1612 EXPORT_SYMBOL_GPL(wm831x_regmap_config);
1613 
1614 const struct of_device_id wm831x_of_match[] = {
1615 	{ .compatible = "wlf,wm8310", .data = (void *)WM8310 },
1616 	{ .compatible = "wlf,wm8311", .data = (void *)WM8311 },
1617 	{ .compatible = "wlf,wm8312", .data = (void *)WM8312 },
1618 	{ .compatible = "wlf,wm8320", .data = (void *)WM8320 },
1619 	{ .compatible = "wlf,wm8321", .data = (void *)WM8321 },
1620 	{ .compatible = "wlf,wm8325", .data = (void *)WM8325 },
1621 	{ .compatible = "wlf,wm8326", .data = (void *)WM8326 },
1622 	{ },
1623 };
1624 EXPORT_SYMBOL_GPL(wm831x_of_match);
1625 
1626 /*
1627  * Instantiate the generic non-control parts of the device.
1628  */
1629 int wm831x_device_init(struct wm831x *wm831x, int irq)
1630 {
1631 	struct wm831x_pdata *pdata = &wm831x->pdata;
1632 	int rev, wm831x_num;
1633 	enum wm831x_parent parent;
1634 	int ret, i;
1635 
1636 	mutex_init(&wm831x->io_lock);
1637 	mutex_init(&wm831x->key_lock);
1638 	dev_set_drvdata(wm831x->dev, wm831x);
1639 
1640 	wm831x->soft_shutdown = pdata->soft_shutdown;
1641 
1642 	ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1643 	if (ret < 0) {
1644 		dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1645 		goto err;
1646 	}
1647 	switch (ret) {
1648 	case 0x6204:
1649 	case 0x6246:
1650 		break;
1651 	default:
1652 		dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1653 		ret = -EINVAL;
1654 		goto err;
1655 	}
1656 
1657 	ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1658 	if (ret < 0) {
1659 		dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1660 		goto err;
1661 	}
1662 	rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1663 
1664 	ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1665 	if (ret < 0) {
1666 		dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1667 		goto err;
1668 	}
1669 
1670 	/* Some engineering samples do not have the ID set, rely on
1671 	 * the device being registered correctly.
1672 	 */
1673 	if (ret == 0) {
1674 		dev_info(wm831x->dev, "Device is an engineering sample\n");
1675 		ret = wm831x->type;
1676 	}
1677 
1678 	switch (ret) {
1679 	case WM8310:
1680 		parent = WM8310;
1681 		wm831x->num_gpio = 16;
1682 		wm831x->charger_irq_wake = 1;
1683 		if (rev > 0) {
1684 			wm831x->has_gpio_ena = 1;
1685 			wm831x->has_cs_sts = 1;
1686 		}
1687 
1688 		dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
1689 		break;
1690 
1691 	case WM8311:
1692 		parent = WM8311;
1693 		wm831x->num_gpio = 16;
1694 		wm831x->charger_irq_wake = 1;
1695 		if (rev > 0) {
1696 			wm831x->has_gpio_ena = 1;
1697 			wm831x->has_cs_sts = 1;
1698 		}
1699 
1700 		dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
1701 		break;
1702 
1703 	case WM8312:
1704 		parent = WM8312;
1705 		wm831x->num_gpio = 16;
1706 		wm831x->charger_irq_wake = 1;
1707 		if (rev > 0) {
1708 			wm831x->has_gpio_ena = 1;
1709 			wm831x->has_cs_sts = 1;
1710 		}
1711 
1712 		dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
1713 		break;
1714 
1715 	case WM8320:
1716 		parent = WM8320;
1717 		wm831x->num_gpio = 12;
1718 		dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);
1719 		break;
1720 
1721 	case WM8321:
1722 		parent = WM8321;
1723 		wm831x->num_gpio = 12;
1724 		dev_info(wm831x->dev, "WM8321 revision %c\n", 'A' + rev);
1725 		break;
1726 
1727 	case WM8325:
1728 		parent = WM8325;
1729 		wm831x->num_gpio = 12;
1730 		dev_info(wm831x->dev, "WM8325 revision %c\n", 'A' + rev);
1731 		break;
1732 
1733 	case WM8326:
1734 		parent = WM8326;
1735 		wm831x->num_gpio = 12;
1736 		dev_info(wm831x->dev, "WM8326 revision %c\n", 'A' + rev);
1737 		break;
1738 
1739 	default:
1740 		dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1741 		ret = -EINVAL;
1742 		goto err;
1743 	}
1744 
1745 	/* This will need revisiting in future but is OK for all
1746 	 * current parts.
1747 	 */
1748 	if (parent != wm831x->type)
1749 		dev_warn(wm831x->dev, "Device was registered as a WM%x\n",
1750 			 wm831x->type);
1751 
1752 	/* Bootstrap the user key */
1753 	ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1754 	if (ret < 0) {
1755 		dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1756 		goto err;
1757 	}
1758 	if (ret != 0) {
1759 		dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1760 			 ret);
1761 		wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1762 	}
1763 	wm831x->locked = 1;
1764 
1765 	if (pdata->pre_init) {
1766 		ret = pdata->pre_init(wm831x);
1767 		if (ret != 0) {
1768 			dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1769 			goto err;
1770 		}
1771 	}
1772 
1773 	for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
1774 		if (!pdata->gpio_defaults[i])
1775 			continue;
1776 
1777 		wm831x_reg_write(wm831x,
1778 				 WM831X_GPIO1_CONTROL + i,
1779 				 pdata->gpio_defaults[i] & 0xffff);
1780 	}
1781 
1782 	/* Multiply by 10 as we have many subdevices of the same type */
1783 	if (pdata->wm831x_num)
1784 		wm831x_num = pdata->wm831x_num * 10;
1785 	else
1786 		wm831x_num = -1;
1787 
1788 	ret = wm831x_irq_init(wm831x, irq);
1789 	if (ret != 0)
1790 		goto err;
1791 
1792 	wm831x_auxadc_init(wm831x);
1793 
1794 	/* The core device is up, instantiate the subdevices. */
1795 	switch (parent) {
1796 	case WM8310:
1797 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1798 				      wm8310_devs, ARRAY_SIZE(wm8310_devs),
1799 				      NULL, 0, NULL);
1800 		break;
1801 
1802 	case WM8311:
1803 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1804 				      wm8311_devs, ARRAY_SIZE(wm8311_devs),
1805 				      NULL, 0, NULL);
1806 		if (!pdata->disable_touch)
1807 			mfd_add_devices(wm831x->dev, wm831x_num,
1808 					touch_devs, ARRAY_SIZE(touch_devs),
1809 					NULL, 0, NULL);
1810 		break;
1811 
1812 	case WM8312:
1813 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1814 				      wm8312_devs, ARRAY_SIZE(wm8312_devs),
1815 				      NULL, 0, NULL);
1816 		if (!pdata->disable_touch)
1817 			mfd_add_devices(wm831x->dev, wm831x_num,
1818 					touch_devs, ARRAY_SIZE(touch_devs),
1819 					NULL, 0, NULL);
1820 		break;
1821 
1822 	case WM8320:
1823 	case WM8321:
1824 	case WM8325:
1825 	case WM8326:
1826 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1827 				      wm8320_devs, ARRAY_SIZE(wm8320_devs),
1828 				      NULL, 0, NULL);
1829 		break;
1830 
1831 	default:
1832 		/* If this happens the bus probe function is buggy */
1833 		BUG();
1834 	}
1835 
1836 	if (ret != 0) {
1837 		dev_err(wm831x->dev, "Failed to add children\n");
1838 		goto err_irq;
1839 	}
1840 
1841 	/* The RTC can only be used if the 32.768kHz crystal is
1842 	 * enabled; this can't be controlled by software at runtime.
1843 	 */
1844 	ret = wm831x_reg_read(wm831x, WM831X_CLOCK_CONTROL_2);
1845 	if (ret < 0) {
1846 		dev_err(wm831x->dev, "Failed to read clock status: %d\n", ret);
1847 		goto err_irq;
1848 	}
1849 
1850 	if (ret & WM831X_XTAL_ENA) {
1851 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1852 				      rtc_devs, ARRAY_SIZE(rtc_devs),
1853 				      NULL, 0, NULL);
1854 		if (ret != 0) {
1855 			dev_err(wm831x->dev, "Failed to add RTC: %d\n", ret);
1856 			goto err_irq;
1857 		}
1858 	} else {
1859 		dev_info(wm831x->dev, "32.768kHz clock disabled, no RTC\n");
1860 	}
1861 
1862 	if (pdata->backlight) {
1863 		/* Treat errors as non-critical */
1864 		ret = mfd_add_devices(wm831x->dev, wm831x_num, backlight_devs,
1865 				      ARRAY_SIZE(backlight_devs), NULL,
1866 				      0, NULL);
1867 		if (ret < 0)
1868 			dev_err(wm831x->dev, "Failed to add backlight: %d\n",
1869 				ret);
1870 	}
1871 
1872 	wm831x_otp_init(wm831x);
1873 
1874 	if (pdata->post_init) {
1875 		ret = pdata->post_init(wm831x);
1876 		if (ret != 0) {
1877 			dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1878 			goto err_irq;
1879 		}
1880 	}
1881 
1882 	return 0;
1883 
1884 err_irq:
1885 	wm831x_irq_exit(wm831x);
1886 err:
1887 	mfd_remove_devices(wm831x->dev);
1888 	return ret;
1889 }
1890 
1891 int wm831x_device_suspend(struct wm831x *wm831x)
1892 {
1893 	int reg, mask;
1894 
1895 	/* If the charger IRQs are a wake source then make sure we ack
1896 	 * them even if they're not actively being used (eg, no power
1897 	 * driver or no IRQ line wired up) then acknowledge the
1898 	 * interrupts otherwise suspend won't last very long.
1899 	 */
1900 	if (wm831x->charger_irq_wake) {
1901 		reg = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_2_MASK);
1902 
1903 		mask = WM831X_CHG_BATT_HOT_EINT |
1904 			WM831X_CHG_BATT_COLD_EINT |
1905 			WM831X_CHG_BATT_FAIL_EINT |
1906 			WM831X_CHG_OV_EINT | WM831X_CHG_END_EINT |
1907 			WM831X_CHG_TO_EINT | WM831X_CHG_MODE_EINT |
1908 			WM831X_CHG_START_EINT;
1909 
1910 		/* If any of the interrupts are masked read the statuses */
1911 		if (reg & mask)
1912 			reg = wm831x_reg_read(wm831x,
1913 					      WM831X_INTERRUPT_STATUS_2);
1914 
1915 		if (reg & mask) {
1916 			dev_info(wm831x->dev,
1917 				 "Acknowledging masked charger IRQs: %x\n",
1918 				 reg & mask);
1919 			wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_2,
1920 					 reg & mask);
1921 		}
1922 	}
1923 
1924 	return 0;
1925 }
1926 
1927 void wm831x_device_shutdown(struct wm831x *wm831x)
1928 {
1929 	if (wm831x->soft_shutdown) {
1930 		dev_info(wm831x->dev, "Initiating shutdown...\n");
1931 		wm831x_set_bits(wm831x, WM831X_POWER_STATE, WM831X_CHIP_ON, 0);
1932 	}
1933 }
1934 EXPORT_SYMBOL_GPL(wm831x_device_shutdown);
1935