xref: /linux/drivers/mfd/wm831x-core.c (revision 58f6259b7a08f8d47d4629609703d358b042f0fd) 
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_lock: Unlock user keyed registers
113  *
114  * The WM831x has a user key preventing writes to particularly
115  * critical registers.  This function locks those registers,
116  * allowing writes to them.
117  *
118  * @wm831x: pointer to local driver data structure
119  */
120 void wm831x_reg_lock(struct wm831x *wm831x)
121 {
122 	int ret;
123 
124 	ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
125 	if (ret == 0) {
126 		dev_vdbg(wm831x->dev, "Registers locked\n");
127 
128 		mutex_lock(&wm831x->io_lock);
129 		WARN_ON(wm831x->locked);
130 		wm831x->locked = 1;
131 		mutex_unlock(&wm831x->io_lock);
132 	} else {
133 		dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret);
134 	}
135 
136 }
137 EXPORT_SYMBOL_GPL(wm831x_reg_lock);
138 
139 /**
140  * wm831x_reg_unlock: Unlock user keyed registers
141  *
142  * The WM831x has a user key preventing writes to particularly
143  * critical registers.  This function locks those registers,
144  * preventing spurious writes.
145  *
146  * @wm831x: pointer to local driver data structure
147  */
148 int wm831x_reg_unlock(struct wm831x *wm831x)
149 {
150 	int ret;
151 
152 	/* 0x9716 is the value required to unlock the registers */
153 	ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716);
154 	if (ret == 0) {
155 		dev_vdbg(wm831x->dev, "Registers unlocked\n");
156 
157 		mutex_lock(&wm831x->io_lock);
158 		WARN_ON(!wm831x->locked);
159 		wm831x->locked = 0;
160 		mutex_unlock(&wm831x->io_lock);
161 	}
162 
163 	return ret;
164 }
165 EXPORT_SYMBOL_GPL(wm831x_reg_unlock);
166 
167 static bool wm831x_reg_readable(struct device *dev, unsigned int reg)
168 {
169 	switch (reg) {
170 	case WM831X_RESET_ID:
171 	case WM831X_REVISION:
172 	case WM831X_PARENT_ID:
173 	case WM831X_SYSVDD_CONTROL:
174 	case WM831X_THERMAL_MONITORING:
175 	case WM831X_POWER_STATE:
176 	case WM831X_WATCHDOG:
177 	case WM831X_ON_PIN_CONTROL:
178 	case WM831X_RESET_CONTROL:
179 	case WM831X_CONTROL_INTERFACE:
180 	case WM831X_SECURITY_KEY:
181 	case WM831X_SOFTWARE_SCRATCH:
182 	case WM831X_OTP_CONTROL:
183 	case WM831X_GPIO_LEVEL:
184 	case WM831X_SYSTEM_STATUS:
185 	case WM831X_ON_SOURCE:
186 	case WM831X_OFF_SOURCE:
187 	case WM831X_SYSTEM_INTERRUPTS:
188 	case WM831X_INTERRUPT_STATUS_1:
189 	case WM831X_INTERRUPT_STATUS_2:
190 	case WM831X_INTERRUPT_STATUS_3:
191 	case WM831X_INTERRUPT_STATUS_4:
192 	case WM831X_INTERRUPT_STATUS_5:
193 	case WM831X_IRQ_CONFIG:
194 	case WM831X_SYSTEM_INTERRUPTS_MASK:
195 	case WM831X_INTERRUPT_STATUS_1_MASK:
196 	case WM831X_INTERRUPT_STATUS_2_MASK:
197 	case WM831X_INTERRUPT_STATUS_3_MASK:
198 	case WM831X_INTERRUPT_STATUS_4_MASK:
199 	case WM831X_INTERRUPT_STATUS_5_MASK:
200 	case WM831X_RTC_WRITE_COUNTER:
201 	case WM831X_RTC_TIME_1:
202 	case WM831X_RTC_TIME_2:
203 	case WM831X_RTC_ALARM_1:
204 	case WM831X_RTC_ALARM_2:
205 	case WM831X_RTC_CONTROL:
206 	case WM831X_RTC_TRIM:
207 	case WM831X_TOUCH_CONTROL_1:
208 	case WM831X_TOUCH_CONTROL_2:
209 	case WM831X_TOUCH_DATA_X:
210 	case WM831X_TOUCH_DATA_Y:
211 	case WM831X_TOUCH_DATA_Z:
212 	case WM831X_AUXADC_DATA:
213 	case WM831X_AUXADC_CONTROL:
214 	case WM831X_AUXADC_SOURCE:
215 	case WM831X_COMPARATOR_CONTROL:
216 	case WM831X_COMPARATOR_1:
217 	case WM831X_COMPARATOR_2:
218 	case WM831X_COMPARATOR_3:
219 	case WM831X_COMPARATOR_4:
220 	case WM831X_GPIO1_CONTROL:
221 	case WM831X_GPIO2_CONTROL:
222 	case WM831X_GPIO3_CONTROL:
223 	case WM831X_GPIO4_CONTROL:
224 	case WM831X_GPIO5_CONTROL:
225 	case WM831X_GPIO6_CONTROL:
226 	case WM831X_GPIO7_CONTROL:
227 	case WM831X_GPIO8_CONTROL:
228 	case WM831X_GPIO9_CONTROL:
229 	case WM831X_GPIO10_CONTROL:
230 	case WM831X_GPIO11_CONTROL:
231 	case WM831X_GPIO12_CONTROL:
232 	case WM831X_GPIO13_CONTROL:
233 	case WM831X_GPIO14_CONTROL:
234 	case WM831X_GPIO15_CONTROL:
235 	case WM831X_GPIO16_CONTROL:
236 	case WM831X_CHARGER_CONTROL_1:
237 	case WM831X_CHARGER_CONTROL_2:
238 	case WM831X_CHARGER_STATUS:
239 	case WM831X_BACKUP_CHARGER_CONTROL:
240 	case WM831X_STATUS_LED_1:
241 	case WM831X_STATUS_LED_2:
242 	case WM831X_CURRENT_SINK_1:
243 	case WM831X_CURRENT_SINK_2:
244 	case WM831X_DCDC_ENABLE:
245 	case WM831X_LDO_ENABLE:
246 	case WM831X_DCDC_STATUS:
247 	case WM831X_LDO_STATUS:
248 	case WM831X_DCDC_UV_STATUS:
249 	case WM831X_LDO_UV_STATUS:
250 	case WM831X_DC1_CONTROL_1:
251 	case WM831X_DC1_CONTROL_2:
252 	case WM831X_DC1_ON_CONFIG:
253 	case WM831X_DC1_SLEEP_CONTROL:
254 	case WM831X_DC1_DVS_CONTROL:
255 	case WM831X_DC2_CONTROL_1:
256 	case WM831X_DC2_CONTROL_2:
257 	case WM831X_DC2_ON_CONFIG:
258 	case WM831X_DC2_SLEEP_CONTROL:
259 	case WM831X_DC2_DVS_CONTROL:
260 	case WM831X_DC3_CONTROL_1:
261 	case WM831X_DC3_CONTROL_2:
262 	case WM831X_DC3_ON_CONFIG:
263 	case WM831X_DC3_SLEEP_CONTROL:
264 	case WM831X_DC4_CONTROL:
265 	case WM831X_DC4_SLEEP_CONTROL:
266 	case WM831X_EPE1_CONTROL:
267 	case WM831X_EPE2_CONTROL:
268 	case WM831X_LDO1_CONTROL:
269 	case WM831X_LDO1_ON_CONTROL:
270 	case WM831X_LDO1_SLEEP_CONTROL:
271 	case WM831X_LDO2_CONTROL:
272 	case WM831X_LDO2_ON_CONTROL:
273 	case WM831X_LDO2_SLEEP_CONTROL:
274 	case WM831X_LDO3_CONTROL:
275 	case WM831X_LDO3_ON_CONTROL:
276 	case WM831X_LDO3_SLEEP_CONTROL:
277 	case WM831X_LDO4_CONTROL:
278 	case WM831X_LDO4_ON_CONTROL:
279 	case WM831X_LDO4_SLEEP_CONTROL:
280 	case WM831X_LDO5_CONTROL:
281 	case WM831X_LDO5_ON_CONTROL:
282 	case WM831X_LDO5_SLEEP_CONTROL:
283 	case WM831X_LDO6_CONTROL:
284 	case WM831X_LDO6_ON_CONTROL:
285 	case WM831X_LDO6_SLEEP_CONTROL:
286 	case WM831X_LDO7_CONTROL:
287 	case WM831X_LDO7_ON_CONTROL:
288 	case WM831X_LDO7_SLEEP_CONTROL:
289 	case WM831X_LDO8_CONTROL:
290 	case WM831X_LDO8_ON_CONTROL:
291 	case WM831X_LDO8_SLEEP_CONTROL:
292 	case WM831X_LDO9_CONTROL:
293 	case WM831X_LDO9_ON_CONTROL:
294 	case WM831X_LDO9_SLEEP_CONTROL:
295 	case WM831X_LDO10_CONTROL:
296 	case WM831X_LDO10_ON_CONTROL:
297 	case WM831X_LDO10_SLEEP_CONTROL:
298 	case WM831X_LDO11_ON_CONTROL:
299 	case WM831X_LDO11_SLEEP_CONTROL:
300 	case WM831X_POWER_GOOD_SOURCE_1:
301 	case WM831X_POWER_GOOD_SOURCE_2:
302 	case WM831X_CLOCK_CONTROL_1:
303 	case WM831X_CLOCK_CONTROL_2:
304 	case WM831X_FLL_CONTROL_1:
305 	case WM831X_FLL_CONTROL_2:
306 	case WM831X_FLL_CONTROL_3:
307 	case WM831X_FLL_CONTROL_4:
308 	case WM831X_FLL_CONTROL_5:
309 	case WM831X_UNIQUE_ID_1:
310 	case WM831X_UNIQUE_ID_2:
311 	case WM831X_UNIQUE_ID_3:
312 	case WM831X_UNIQUE_ID_4:
313 	case WM831X_UNIQUE_ID_5:
314 	case WM831X_UNIQUE_ID_6:
315 	case WM831X_UNIQUE_ID_7:
316 	case WM831X_UNIQUE_ID_8:
317 	case WM831X_FACTORY_OTP_ID:
318 	case WM831X_FACTORY_OTP_1:
319 	case WM831X_FACTORY_OTP_2:
320 	case WM831X_FACTORY_OTP_3:
321 	case WM831X_FACTORY_OTP_4:
322 	case WM831X_FACTORY_OTP_5:
323 	case WM831X_CUSTOMER_OTP_ID:
324 	case WM831X_DC1_OTP_CONTROL:
325 	case WM831X_DC2_OTP_CONTROL:
326 	case WM831X_DC3_OTP_CONTROL:
327 	case WM831X_LDO1_2_OTP_CONTROL:
328 	case WM831X_LDO3_4_OTP_CONTROL:
329 	case WM831X_LDO5_6_OTP_CONTROL:
330 	case WM831X_LDO7_8_OTP_CONTROL:
331 	case WM831X_LDO9_10_OTP_CONTROL:
332 	case WM831X_LDO11_EPE_CONTROL:
333 	case WM831X_GPIO1_OTP_CONTROL:
334 	case WM831X_GPIO2_OTP_CONTROL:
335 	case WM831X_GPIO3_OTP_CONTROL:
336 	case WM831X_GPIO4_OTP_CONTROL:
337 	case WM831X_GPIO5_OTP_CONTROL:
338 	case WM831X_GPIO6_OTP_CONTROL:
339 	case WM831X_DBE_CHECK_DATA:
340 		return true;
341 	default:
342 		return false;
343 	}
344 }
345 
346 static bool wm831x_reg_writeable(struct device *dev, unsigned int reg)
347 {
348 	struct wm831x *wm831x = dev_get_drvdata(dev);
349 
350 	if (wm831x_reg_locked(wm831x, reg))
351 		return false;
352 
353 	switch (reg) {
354 	case WM831X_SYSVDD_CONTROL:
355 	case WM831X_THERMAL_MONITORING:
356 	case WM831X_POWER_STATE:
357 	case WM831X_WATCHDOG:
358 	case WM831X_ON_PIN_CONTROL:
359 	case WM831X_RESET_CONTROL:
360 	case WM831X_CONTROL_INTERFACE:
361 	case WM831X_SECURITY_KEY:
362 	case WM831X_SOFTWARE_SCRATCH:
363 	case WM831X_OTP_CONTROL:
364 	case WM831X_GPIO_LEVEL:
365 	case WM831X_INTERRUPT_STATUS_1:
366 	case WM831X_INTERRUPT_STATUS_2:
367 	case WM831X_INTERRUPT_STATUS_3:
368 	case WM831X_INTERRUPT_STATUS_4:
369 	case WM831X_INTERRUPT_STATUS_5:
370 	case WM831X_IRQ_CONFIG:
371 	case WM831X_SYSTEM_INTERRUPTS_MASK:
372 	case WM831X_INTERRUPT_STATUS_1_MASK:
373 	case WM831X_INTERRUPT_STATUS_2_MASK:
374 	case WM831X_INTERRUPT_STATUS_3_MASK:
375 	case WM831X_INTERRUPT_STATUS_4_MASK:
376 	case WM831X_INTERRUPT_STATUS_5_MASK:
377 	case WM831X_RTC_TIME_1:
378 	case WM831X_RTC_TIME_2:
379 	case WM831X_RTC_ALARM_1:
380 	case WM831X_RTC_ALARM_2:
381 	case WM831X_RTC_CONTROL:
382 	case WM831X_RTC_TRIM:
383 	case WM831X_TOUCH_CONTROL_1:
384 	case WM831X_TOUCH_CONTROL_2:
385 	case WM831X_AUXADC_CONTROL:
386 	case WM831X_AUXADC_SOURCE:
387 	case WM831X_COMPARATOR_CONTROL:
388 	case WM831X_COMPARATOR_1:
389 	case WM831X_COMPARATOR_2:
390 	case WM831X_COMPARATOR_3:
391 	case WM831X_COMPARATOR_4:
392 	case WM831X_GPIO1_CONTROL:
393 	case WM831X_GPIO2_CONTROL:
394 	case WM831X_GPIO3_CONTROL:
395 	case WM831X_GPIO4_CONTROL:
396 	case WM831X_GPIO5_CONTROL:
397 	case WM831X_GPIO6_CONTROL:
398 	case WM831X_GPIO7_CONTROL:
399 	case WM831X_GPIO8_CONTROL:
400 	case WM831X_GPIO9_CONTROL:
401 	case WM831X_GPIO10_CONTROL:
402 	case WM831X_GPIO11_CONTROL:
403 	case WM831X_GPIO12_CONTROL:
404 	case WM831X_GPIO13_CONTROL:
405 	case WM831X_GPIO14_CONTROL:
406 	case WM831X_GPIO15_CONTROL:
407 	case WM831X_GPIO16_CONTROL:
408 	case WM831X_CHARGER_CONTROL_1:
409 	case WM831X_CHARGER_CONTROL_2:
410 	case WM831X_CHARGER_STATUS:
411 	case WM831X_BACKUP_CHARGER_CONTROL:
412 	case WM831X_STATUS_LED_1:
413 	case WM831X_STATUS_LED_2:
414 	case WM831X_CURRENT_SINK_1:
415 	case WM831X_CURRENT_SINK_2:
416 	case WM831X_DCDC_ENABLE:
417 	case WM831X_LDO_ENABLE:
418 	case WM831X_DC1_CONTROL_1:
419 	case WM831X_DC1_CONTROL_2:
420 	case WM831X_DC1_ON_CONFIG:
421 	case WM831X_DC1_SLEEP_CONTROL:
422 	case WM831X_DC1_DVS_CONTROL:
423 	case WM831X_DC2_CONTROL_1:
424 	case WM831X_DC2_CONTROL_2:
425 	case WM831X_DC2_ON_CONFIG:
426 	case WM831X_DC2_SLEEP_CONTROL:
427 	case WM831X_DC2_DVS_CONTROL:
428 	case WM831X_DC3_CONTROL_1:
429 	case WM831X_DC3_CONTROL_2:
430 	case WM831X_DC3_ON_CONFIG:
431 	case WM831X_DC3_SLEEP_CONTROL:
432 	case WM831X_DC4_CONTROL:
433 	case WM831X_DC4_SLEEP_CONTROL:
434 	case WM831X_EPE1_CONTROL:
435 	case WM831X_EPE2_CONTROL:
436 	case WM831X_LDO1_CONTROL:
437 	case WM831X_LDO1_ON_CONTROL:
438 	case WM831X_LDO1_SLEEP_CONTROL:
439 	case WM831X_LDO2_CONTROL:
440 	case WM831X_LDO2_ON_CONTROL:
441 	case WM831X_LDO2_SLEEP_CONTROL:
442 	case WM831X_LDO3_CONTROL:
443 	case WM831X_LDO3_ON_CONTROL:
444 	case WM831X_LDO3_SLEEP_CONTROL:
445 	case WM831X_LDO4_CONTROL:
446 	case WM831X_LDO4_ON_CONTROL:
447 	case WM831X_LDO4_SLEEP_CONTROL:
448 	case WM831X_LDO5_CONTROL:
449 	case WM831X_LDO5_ON_CONTROL:
450 	case WM831X_LDO5_SLEEP_CONTROL:
451 	case WM831X_LDO6_CONTROL:
452 	case WM831X_LDO6_ON_CONTROL:
453 	case WM831X_LDO6_SLEEP_CONTROL:
454 	case WM831X_LDO7_CONTROL:
455 	case WM831X_LDO7_ON_CONTROL:
456 	case WM831X_LDO7_SLEEP_CONTROL:
457 	case WM831X_LDO8_CONTROL:
458 	case WM831X_LDO8_ON_CONTROL:
459 	case WM831X_LDO8_SLEEP_CONTROL:
460 	case WM831X_LDO9_CONTROL:
461 	case WM831X_LDO9_ON_CONTROL:
462 	case WM831X_LDO9_SLEEP_CONTROL:
463 	case WM831X_LDO10_CONTROL:
464 	case WM831X_LDO10_ON_CONTROL:
465 	case WM831X_LDO10_SLEEP_CONTROL:
466 	case WM831X_LDO11_ON_CONTROL:
467 	case WM831X_LDO11_SLEEP_CONTROL:
468 	case WM831X_POWER_GOOD_SOURCE_1:
469 	case WM831X_POWER_GOOD_SOURCE_2:
470 	case WM831X_CLOCK_CONTROL_1:
471 	case WM831X_CLOCK_CONTROL_2:
472 	case WM831X_FLL_CONTROL_1:
473 	case WM831X_FLL_CONTROL_2:
474 	case WM831X_FLL_CONTROL_3:
475 	case WM831X_FLL_CONTROL_4:
476 	case WM831X_FLL_CONTROL_5:
477 		return true;
478 	default:
479 		return false;
480 	}
481 }
482 
483 static bool wm831x_reg_volatile(struct device *dev, unsigned int reg)
484 {
485 	switch (reg) {
486 	case WM831X_SYSTEM_STATUS:
487 	case WM831X_ON_SOURCE:
488 	case WM831X_OFF_SOURCE:
489 	case WM831X_GPIO_LEVEL:
490 	case WM831X_SYSTEM_INTERRUPTS:
491 	case WM831X_INTERRUPT_STATUS_1:
492 	case WM831X_INTERRUPT_STATUS_2:
493 	case WM831X_INTERRUPT_STATUS_3:
494 	case WM831X_INTERRUPT_STATUS_4:
495 	case WM831X_INTERRUPT_STATUS_5:
496 	case WM831X_RTC_TIME_1:
497 	case WM831X_RTC_TIME_2:
498 	case WM831X_TOUCH_DATA_X:
499 	case WM831X_TOUCH_DATA_Y:
500 	case WM831X_TOUCH_DATA_Z:
501 	case WM831X_AUXADC_DATA:
502 	case WM831X_CHARGER_STATUS:
503 	case WM831X_DCDC_STATUS:
504 	case WM831X_LDO_STATUS:
505 	case WM831X_DCDC_UV_STATUS:
506 	case WM831X_LDO_UV_STATUS:
507 		return true;
508 	default:
509 		return false;
510 	}
511 }
512 
513 /**
514  * wm831x_reg_read: Read a single WM831x register.
515  *
516  * @wm831x: Device to read from.
517  * @reg: Register to read.
518  */
519 int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
520 {
521 	unsigned int val;
522 	int ret;
523 
524 	ret = regmap_read(wm831x->regmap, reg, &val);
525 
526 	if (ret < 0)
527 		return ret;
528 	else
529 		return val;
530 }
531 EXPORT_SYMBOL_GPL(wm831x_reg_read);
532 
533 /**
534  * wm831x_bulk_read: Read multiple WM831x registers
535  *
536  * @wm831x: Device to read from
537  * @reg: First register
538  * @count: Number of registers
539  * @buf: Buffer to fill.
540  */
541 int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
542 		     int count, u16 *buf)
543 {
544 	return regmap_bulk_read(wm831x->regmap, reg, buf, count);
545 }
546 EXPORT_SYMBOL_GPL(wm831x_bulk_read);
547 
548 static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
549 			int bytes, void *src)
550 {
551 	u16 *buf = src;
552 	int i, ret;
553 
554 	BUG_ON(bytes % 2);
555 	BUG_ON(bytes <= 0);
556 
557 	for (i = 0; i < bytes / 2; i++) {
558 		if (wm831x_reg_locked(wm831x, reg))
559 			return -EPERM;
560 
561 		dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
562 			 buf[i], reg + i, reg + i);
563 		ret = regmap_write(wm831x->regmap, reg + i, buf[i]);
564 		if (ret != 0)
565 			return ret;
566 	}
567 
568 	return 0;
569 }
570 
571 /**
572  * wm831x_reg_write: Write a single WM831x register.
573  *
574  * @wm831x: Device to write to.
575  * @reg: Register to write to.
576  * @val: Value to write.
577  */
578 int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg,
579 		     unsigned short val)
580 {
581 	int ret;
582 
583 	mutex_lock(&wm831x->io_lock);
584 
585 	ret = wm831x_write(wm831x, reg, 2, &val);
586 
587 	mutex_unlock(&wm831x->io_lock);
588 
589 	return ret;
590 }
591 EXPORT_SYMBOL_GPL(wm831x_reg_write);
592 
593 /**
594  * wm831x_set_bits: Set the value of a bitfield in a WM831x register
595  *
596  * @wm831x: Device to write to.
597  * @reg: Register to write to.
598  * @mask: Mask of bits to set.
599  * @val: Value to set (unshifted)
600  */
601 int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
602 		    unsigned short mask, unsigned short val)
603 {
604 	int ret;
605 
606 	mutex_lock(&wm831x->io_lock);
607 
608 	if (!wm831x_reg_locked(wm831x, reg))
609 		ret = regmap_update_bits(wm831x->regmap, reg, mask, val);
610 	else
611 		ret = -EPERM;
612 
613 	mutex_unlock(&wm831x->io_lock);
614 
615 	return ret;
616 }
617 EXPORT_SYMBOL_GPL(wm831x_set_bits);
618 
619 static const struct resource wm831x_dcdc1_resources[] = {
620 	{
621 		.start = WM831X_DC1_CONTROL_1,
622 		.end   = WM831X_DC1_DVS_CONTROL,
623 		.flags = IORESOURCE_REG,
624 	},
625 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_DC1, "UV"),
626 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_HC_DC1, "HC"),
627 };
628 
629 
630 static const struct resource wm831x_dcdc2_resources[] = {
631 	{
632 		.start = WM831X_DC2_CONTROL_1,
633 		.end   = WM831X_DC2_DVS_CONTROL,
634 		.flags = IORESOURCE_REG,
635 	},
636 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_DC2, "UV"),
637 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_HC_DC2, "HC"),
638 };
639 
640 static const struct resource wm831x_dcdc3_resources[] = {
641 	{
642 		.start = WM831X_DC3_CONTROL_1,
643 		.end   = WM831X_DC3_SLEEP_CONTROL,
644 		.flags = IORESOURCE_REG,
645 	},
646 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_DC3, "UV"),
647 };
648 
649 static const struct resource wm831x_dcdc4_resources[] = {
650 	{
651 		.start = WM831X_DC4_CONTROL,
652 		.end   = WM831X_DC4_SLEEP_CONTROL,
653 		.flags = IORESOURCE_REG,
654 	},
655 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_DC4, "UV"),
656 };
657 
658 static const struct resource wm8320_dcdc4_buck_resources[] = {
659 	{
660 		.start = WM831X_DC4_CONTROL,
661 		.end   = WM832X_DC4_SLEEP_CONTROL,
662 		.flags = IORESOURCE_REG,
663 	},
664 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_DC4, "UV"),
665 };
666 
667 static const struct resource wm831x_gpio_resources[] = {
668 	{
669 		.start = WM831X_IRQ_GPIO_1,
670 		.end   = WM831X_IRQ_GPIO_16,
671 		.flags = IORESOURCE_IRQ,
672 	},
673 };
674 
675 static const struct resource wm831x_isink1_resources[] = {
676 	{
677 		.start = WM831X_CURRENT_SINK_1,
678 		.end   = WM831X_CURRENT_SINK_1,
679 		.flags = IORESOURCE_REG,
680 	},
681 	DEFINE_RES_IRQ(WM831X_IRQ_CS1),
682 };
683 
684 static const struct resource wm831x_isink2_resources[] = {
685 	{
686 		.start = WM831X_CURRENT_SINK_2,
687 		.end   = WM831X_CURRENT_SINK_2,
688 		.flags = IORESOURCE_REG,
689 	},
690 	DEFINE_RES_IRQ(WM831X_IRQ_CS2),
691 };
692 
693 static const struct resource wm831x_ldo1_resources[] = {
694 	{
695 		.start = WM831X_LDO1_CONTROL,
696 		.end   = WM831X_LDO1_SLEEP_CONTROL,
697 		.flags = IORESOURCE_REG,
698 	},
699 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_LDO1, "UV"),
700 };
701 
702 static const struct resource wm831x_ldo2_resources[] = {
703 	{
704 		.start = WM831X_LDO2_CONTROL,
705 		.end   = WM831X_LDO2_SLEEP_CONTROL,
706 		.flags = IORESOURCE_REG,
707 	},
708 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_LDO2, "UV"),
709 };
710 
711 static const struct resource wm831x_ldo3_resources[] = {
712 	{
713 		.start = WM831X_LDO3_CONTROL,
714 		.end   = WM831X_LDO3_SLEEP_CONTROL,
715 		.flags = IORESOURCE_REG,
716 	},
717 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_LDO3, "UV"),
718 };
719 
720 static const struct resource wm831x_ldo4_resources[] = {
721 	{
722 		.start = WM831X_LDO4_CONTROL,
723 		.end   = WM831X_LDO4_SLEEP_CONTROL,
724 		.flags = IORESOURCE_REG,
725 	},
726 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_LDO4, "UV"),
727 };
728 
729 static const struct resource wm831x_ldo5_resources[] = {
730 	{
731 		.start = WM831X_LDO5_CONTROL,
732 		.end   = WM831X_LDO5_SLEEP_CONTROL,
733 		.flags = IORESOURCE_REG,
734 	},
735 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_LDO5, "UV"),
736 };
737 
738 static const struct resource wm831x_ldo6_resources[] = {
739 	{
740 		.start = WM831X_LDO6_CONTROL,
741 		.end   = WM831X_LDO6_SLEEP_CONTROL,
742 		.flags = IORESOURCE_REG,
743 	},
744 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_LDO6, "UV"),
745 };
746 
747 static const struct resource wm831x_ldo7_resources[] = {
748 	{
749 		.start = WM831X_LDO7_CONTROL,
750 		.end   = WM831X_LDO7_SLEEP_CONTROL,
751 		.flags = IORESOURCE_REG,
752 	},
753 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_LDO7, "UV"),
754 };
755 
756 static const struct resource wm831x_ldo8_resources[] = {
757 	{
758 		.start = WM831X_LDO8_CONTROL,
759 		.end   = WM831X_LDO8_SLEEP_CONTROL,
760 		.flags = IORESOURCE_REG,
761 	},
762 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_LDO8, "UV"),
763 };
764 
765 static const struct resource wm831x_ldo9_resources[] = {
766 	{
767 		.start = WM831X_LDO9_CONTROL,
768 		.end   = WM831X_LDO9_SLEEP_CONTROL,
769 		.flags = IORESOURCE_REG,
770 	},
771 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_LDO9, "UV"),
772 };
773 
774 static const struct resource wm831x_ldo10_resources[] = {
775 	{
776 		.start = WM831X_LDO10_CONTROL,
777 		.end   = WM831X_LDO10_SLEEP_CONTROL,
778 		.flags = IORESOURCE_REG,
779 	},
780 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_UV_LDO10, "UV"),
781 };
782 
783 static const struct resource wm831x_ldo11_resources[] = {
784 	{
785 		.start = WM831X_LDO11_ON_CONTROL,
786 		.end   = WM831X_LDO11_SLEEP_CONTROL,
787 		.flags = IORESOURCE_REG,
788 	},
789 };
790 
791 static const struct resource wm831x_on_resources[] = {
792 	DEFINE_RES_IRQ(WM831X_IRQ_ON),
793 };
794 
795 
796 static const struct resource wm831x_power_resources[] = {
797 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_PPM_SYSLO, "SYSLO"),
798 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_PPM_PWR_SRC, "PWR SRC"),
799 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_PPM_USB_CURR, "USB CURR"),
800 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_CHG_BATT_HOT, "BATT HOT"),
801 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_CHG_BATT_COLD, "BATT COLD"),
802 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_CHG_BATT_FAIL, "BATT FAIL"),
803 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_CHG_OV, "OV"),
804 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_CHG_END, "END"),
805 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_CHG_TO, "TO"),
806 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_CHG_MODE, "MODE"),
807 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_CHG_START, "START"),
808 };
809 
810 static const struct resource wm831x_rtc_resources[] = {
811 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_RTC_PER, "PER"),
812 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_RTC_ALM, "ALM"),
813 };
814 
815 static const struct resource wm831x_status1_resources[] = {
816 	{
817 		.start = WM831X_STATUS_LED_1,
818 		.end   = WM831X_STATUS_LED_1,
819 		.flags = IORESOURCE_REG,
820 	},
821 };
822 
823 static const struct resource wm831x_status2_resources[] = {
824 	{
825 		.start = WM831X_STATUS_LED_2,
826 		.end   = WM831X_STATUS_LED_2,
827 		.flags = IORESOURCE_REG,
828 	},
829 };
830 
831 static const struct resource wm831x_touch_resources[] = {
832 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_TCHPD, "TCHPD"),
833 	DEFINE_RES_IRQ_NAMED(WM831X_IRQ_TCHDATA, "TCHDATA"),
834 };
835 
836 static const struct resource wm831x_wdt_resources[] = {
837 	DEFINE_RES_IRQ(WM831X_IRQ_WDOG_TO),
838 };
839 
840 static const struct mfd_cell wm8310_devs[] = {
841 	{
842 		.name = "wm831x-backup",
843 	},
844 	{
845 		.name = "wm831x-buckv",
846 		.id = 1,
847 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
848 		.resources = wm831x_dcdc1_resources,
849 	},
850 	{
851 		.name = "wm831x-buckv",
852 		.id = 2,
853 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
854 		.resources = wm831x_dcdc2_resources,
855 	},
856 	{
857 		.name = "wm831x-buckp",
858 		.id = 3,
859 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
860 		.resources = wm831x_dcdc3_resources,
861 	},
862 	{
863 		.name = "wm831x-boostp",
864 		.id = 4,
865 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
866 		.resources = wm831x_dcdc4_resources,
867 	},
868 	{
869 		.name = "wm831x-clk",
870 	},
871 	{
872 		.name = "wm831x-epe",
873 		.id = 1,
874 	},
875 	{
876 		.name = "wm831x-epe",
877 		.id = 2,
878 	},
879 	{
880 		.name = "wm831x-gpio",
881 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
882 		.resources = wm831x_gpio_resources,
883 	},
884 	{
885 		.name = "wm831x-hwmon",
886 	},
887 	{
888 		.name = "wm831x-isink",
889 		.id = 1,
890 		.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
891 		.resources = wm831x_isink1_resources,
892 	},
893 	{
894 		.name = "wm831x-isink",
895 		.id = 2,
896 		.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
897 		.resources = wm831x_isink2_resources,
898 	},
899 	{
900 		.name = "wm831x-ldo",
901 		.id = 1,
902 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
903 		.resources = wm831x_ldo1_resources,
904 	},
905 	{
906 		.name = "wm831x-ldo",
907 		.id = 2,
908 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
909 		.resources = wm831x_ldo2_resources,
910 	},
911 	{
912 		.name = "wm831x-ldo",
913 		.id = 3,
914 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
915 		.resources = wm831x_ldo3_resources,
916 	},
917 	{
918 		.name = "wm831x-ldo",
919 		.id = 4,
920 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
921 		.resources = wm831x_ldo4_resources,
922 	},
923 	{
924 		.name = "wm831x-ldo",
925 		.id = 5,
926 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
927 		.resources = wm831x_ldo5_resources,
928 	},
929 	{
930 		.name = "wm831x-ldo",
931 		.id = 6,
932 		.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
933 		.resources = wm831x_ldo6_resources,
934 	},
935 	{
936 		.name = "wm831x-aldo",
937 		.id = 7,
938 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
939 		.resources = wm831x_ldo7_resources,
940 	},
941 	{
942 		.name = "wm831x-aldo",
943 		.id = 8,
944 		.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
945 		.resources = wm831x_ldo8_resources,
946 	},
947 	{
948 		.name = "wm831x-aldo",
949 		.id = 9,
950 		.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
951 		.resources = wm831x_ldo9_resources,
952 	},
953 	{
954 		.name = "wm831x-aldo",
955 		.id = 10,
956 		.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
957 		.resources = wm831x_ldo10_resources,
958 	},
959 	{
960 		.name = "wm831x-alive-ldo",
961 		.id = 11,
962 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
963 		.resources = wm831x_ldo11_resources,
964 	},
965 	{
966 		.name = "wm831x-on",
967 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
968 		.resources = wm831x_on_resources,
969 	},
970 	{
971 		.name = "wm831x-power",
972 		.num_resources = ARRAY_SIZE(wm831x_power_resources),
973 		.resources = wm831x_power_resources,
974 	},
975 	{
976 		.name = "wm831x-status",
977 		.id = 1,
978 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
979 		.resources = wm831x_status1_resources,
980 	},
981 	{
982 		.name = "wm831x-status",
983 		.id = 2,
984 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
985 		.resources = wm831x_status2_resources,
986 	},
987 	{
988 		.name = "wm831x-watchdog",
989 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
990 		.resources = wm831x_wdt_resources,
991 	},
992 };
993 
994 static const struct mfd_cell wm8311_devs[] = {
995 	{
996 		.name = "wm831x-backup",
997 	},
998 	{
999 		.name = "wm831x-buckv",
1000 		.id = 1,
1001 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1002 		.resources = wm831x_dcdc1_resources,
1003 	},
1004 	{
1005 		.name = "wm831x-buckv",
1006 		.id = 2,
1007 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1008 		.resources = wm831x_dcdc2_resources,
1009 	},
1010 	{
1011 		.name = "wm831x-buckp",
1012 		.id = 3,
1013 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1014 		.resources = wm831x_dcdc3_resources,
1015 	},
1016 	{
1017 		.name = "wm831x-boostp",
1018 		.id = 4,
1019 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1020 		.resources = wm831x_dcdc4_resources,
1021 	},
1022 	{
1023 		.name = "wm831x-clk",
1024 	},
1025 	{
1026 		.name = "wm831x-epe",
1027 		.id = 1,
1028 	},
1029 	{
1030 		.name = "wm831x-epe",
1031 		.id = 2,
1032 	},
1033 	{
1034 		.name = "wm831x-gpio",
1035 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1036 		.resources = wm831x_gpio_resources,
1037 	},
1038 	{
1039 		.name = "wm831x-hwmon",
1040 	},
1041 	{
1042 		.name = "wm831x-isink",
1043 		.id = 1,
1044 		.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1045 		.resources = wm831x_isink1_resources,
1046 	},
1047 	{
1048 		.name = "wm831x-isink",
1049 		.id = 2,
1050 		.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1051 		.resources = wm831x_isink2_resources,
1052 	},
1053 	{
1054 		.name = "wm831x-ldo",
1055 		.id = 1,
1056 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1057 		.resources = wm831x_ldo1_resources,
1058 	},
1059 	{
1060 		.name = "wm831x-ldo",
1061 		.id = 2,
1062 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1063 		.resources = wm831x_ldo2_resources,
1064 	},
1065 	{
1066 		.name = "wm831x-ldo",
1067 		.id = 3,
1068 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1069 		.resources = wm831x_ldo3_resources,
1070 	},
1071 	{
1072 		.name = "wm831x-ldo",
1073 		.id = 4,
1074 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1075 		.resources = wm831x_ldo4_resources,
1076 	},
1077 	{
1078 		.name = "wm831x-ldo",
1079 		.id = 5,
1080 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1081 		.resources = wm831x_ldo5_resources,
1082 	},
1083 	{
1084 		.name = "wm831x-aldo",
1085 		.id = 7,
1086 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1087 		.resources = wm831x_ldo7_resources,
1088 	},
1089 	{
1090 		.name = "wm831x-alive-ldo",
1091 		.id = 11,
1092 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1093 		.resources = wm831x_ldo11_resources,
1094 	},
1095 	{
1096 		.name = "wm831x-on",
1097 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
1098 		.resources = wm831x_on_resources,
1099 	},
1100 	{
1101 		.name = "wm831x-power",
1102 		.num_resources = ARRAY_SIZE(wm831x_power_resources),
1103 		.resources = wm831x_power_resources,
1104 	},
1105 	{
1106 		.name = "wm831x-status",
1107 		.id = 1,
1108 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
1109 		.resources = wm831x_status1_resources,
1110 	},
1111 	{
1112 		.name = "wm831x-status",
1113 		.id = 2,
1114 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
1115 		.resources = wm831x_status2_resources,
1116 	},
1117 	{
1118 		.name = "wm831x-watchdog",
1119 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1120 		.resources = wm831x_wdt_resources,
1121 	},
1122 };
1123 
1124 static const struct mfd_cell wm8312_devs[] = {
1125 	{
1126 		.name = "wm831x-backup",
1127 	},
1128 	{
1129 		.name = "wm831x-buckv",
1130 		.id = 1,
1131 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1132 		.resources = wm831x_dcdc1_resources,
1133 	},
1134 	{
1135 		.name = "wm831x-buckv",
1136 		.id = 2,
1137 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1138 		.resources = wm831x_dcdc2_resources,
1139 	},
1140 	{
1141 		.name = "wm831x-buckp",
1142 		.id = 3,
1143 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1144 		.resources = wm831x_dcdc3_resources,
1145 	},
1146 	{
1147 		.name = "wm831x-boostp",
1148 		.id = 4,
1149 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1150 		.resources = wm831x_dcdc4_resources,
1151 	},
1152 	{
1153 		.name = "wm831x-clk",
1154 	},
1155 	{
1156 		.name = "wm831x-epe",
1157 		.id = 1,
1158 	},
1159 	{
1160 		.name = "wm831x-epe",
1161 		.id = 2,
1162 	},
1163 	{
1164 		.name = "wm831x-gpio",
1165 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1166 		.resources = wm831x_gpio_resources,
1167 	},
1168 	{
1169 		.name = "wm831x-hwmon",
1170 	},
1171 	{
1172 		.name = "wm831x-isink",
1173 		.id = 1,
1174 		.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1175 		.resources = wm831x_isink1_resources,
1176 	},
1177 	{
1178 		.name = "wm831x-isink",
1179 		.id = 2,
1180 		.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1181 		.resources = wm831x_isink2_resources,
1182 	},
1183 	{
1184 		.name = "wm831x-ldo",
1185 		.id = 1,
1186 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1187 		.resources = wm831x_ldo1_resources,
1188 	},
1189 	{
1190 		.name = "wm831x-ldo",
1191 		.id = 2,
1192 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1193 		.resources = wm831x_ldo2_resources,
1194 	},
1195 	{
1196 		.name = "wm831x-ldo",
1197 		.id = 3,
1198 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1199 		.resources = wm831x_ldo3_resources,
1200 	},
1201 	{
1202 		.name = "wm831x-ldo",
1203 		.id = 4,
1204 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1205 		.resources = wm831x_ldo4_resources,
1206 	},
1207 	{
1208 		.name = "wm831x-ldo",
1209 		.id = 5,
1210 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1211 		.resources = wm831x_ldo5_resources,
1212 	},
1213 	{
1214 		.name = "wm831x-ldo",
1215 		.id = 6,
1216 		.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1217 		.resources = wm831x_ldo6_resources,
1218 	},
1219 	{
1220 		.name = "wm831x-aldo",
1221 		.id = 7,
1222 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1223 		.resources = wm831x_ldo7_resources,
1224 	},
1225 	{
1226 		.name = "wm831x-aldo",
1227 		.id = 8,
1228 		.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1229 		.resources = wm831x_ldo8_resources,
1230 	},
1231 	{
1232 		.name = "wm831x-aldo",
1233 		.id = 9,
1234 		.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1235 		.resources = wm831x_ldo9_resources,
1236 	},
1237 	{
1238 		.name = "wm831x-aldo",
1239 		.id = 10,
1240 		.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1241 		.resources = wm831x_ldo10_resources,
1242 	},
1243 	{
1244 		.name = "wm831x-alive-ldo",
1245 		.id = 11,
1246 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1247 		.resources = wm831x_ldo11_resources,
1248 	},
1249 	{
1250 		.name = "wm831x-on",
1251 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
1252 		.resources = wm831x_on_resources,
1253 	},
1254 	{
1255 		.name = "wm831x-power",
1256 		.num_resources = ARRAY_SIZE(wm831x_power_resources),
1257 		.resources = wm831x_power_resources,
1258 	},
1259 	{
1260 		.name = "wm831x-status",
1261 		.id = 1,
1262 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
1263 		.resources = wm831x_status1_resources,
1264 	},
1265 	{
1266 		.name = "wm831x-status",
1267 		.id = 2,
1268 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
1269 		.resources = wm831x_status2_resources,
1270 	},
1271 	{
1272 		.name = "wm831x-watchdog",
1273 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1274 		.resources = wm831x_wdt_resources,
1275 	},
1276 };
1277 
1278 static const struct mfd_cell wm8320_devs[] = {
1279 	{
1280 		.name = "wm831x-backup",
1281 	},
1282 	{
1283 		.name = "wm831x-buckv",
1284 		.id = 1,
1285 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1286 		.resources = wm831x_dcdc1_resources,
1287 	},
1288 	{
1289 		.name = "wm831x-buckv",
1290 		.id = 2,
1291 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1292 		.resources = wm831x_dcdc2_resources,
1293 	},
1294 	{
1295 		.name = "wm831x-buckp",
1296 		.id = 3,
1297 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1298 		.resources = wm831x_dcdc3_resources,
1299 	},
1300 	{
1301 		.name = "wm831x-buckp",
1302 		.id = 4,
1303 		.num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
1304 		.resources = wm8320_dcdc4_buck_resources,
1305 	},
1306 	{
1307 		.name = "wm831x-clk",
1308 	},
1309 	{
1310 		.name = "wm831x-gpio",
1311 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1312 		.resources = wm831x_gpio_resources,
1313 	},
1314 	{
1315 		.name = "wm831x-hwmon",
1316 	},
1317 	{
1318 		.name = "wm831x-ldo",
1319 		.id = 1,
1320 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1321 		.resources = wm831x_ldo1_resources,
1322 	},
1323 	{
1324 		.name = "wm831x-ldo",
1325 		.id = 2,
1326 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1327 		.resources = wm831x_ldo2_resources,
1328 	},
1329 	{
1330 		.name = "wm831x-ldo",
1331 		.id = 3,
1332 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1333 		.resources = wm831x_ldo3_resources,
1334 	},
1335 	{
1336 		.name = "wm831x-ldo",
1337 		.id = 4,
1338 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1339 		.resources = wm831x_ldo4_resources,
1340 	},
1341 	{
1342 		.name = "wm831x-ldo",
1343 		.id = 5,
1344 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1345 		.resources = wm831x_ldo5_resources,
1346 	},
1347 	{
1348 		.name = "wm831x-ldo",
1349 		.id = 6,
1350 		.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1351 		.resources = wm831x_ldo6_resources,
1352 	},
1353 	{
1354 		.name = "wm831x-aldo",
1355 		.id = 7,
1356 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1357 		.resources = wm831x_ldo7_resources,
1358 	},
1359 	{
1360 		.name = "wm831x-aldo",
1361 		.id = 8,
1362 		.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1363 		.resources = wm831x_ldo8_resources,
1364 	},
1365 	{
1366 		.name = "wm831x-aldo",
1367 		.id = 9,
1368 		.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1369 		.resources = wm831x_ldo9_resources,
1370 	},
1371 	{
1372 		.name = "wm831x-aldo",
1373 		.id = 10,
1374 		.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1375 		.resources = wm831x_ldo10_resources,
1376 	},
1377 	{
1378 		.name = "wm831x-alive-ldo",
1379 		.id = 11,
1380 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1381 		.resources = wm831x_ldo11_resources,
1382 	},
1383 	{
1384 		.name = "wm831x-on",
1385 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
1386 		.resources = wm831x_on_resources,
1387 	},
1388 	{
1389 		.name = "wm831x-status",
1390 		.id = 1,
1391 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
1392 		.resources = wm831x_status1_resources,
1393 	},
1394 	{
1395 		.name = "wm831x-status",
1396 		.id = 2,
1397 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
1398 		.resources = wm831x_status2_resources,
1399 	},
1400 	{
1401 		.name = "wm831x-watchdog",
1402 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1403 		.resources = wm831x_wdt_resources,
1404 	},
1405 };
1406 
1407 static const struct mfd_cell touch_devs[] = {
1408 	{
1409 		.name = "wm831x-touch",
1410 		.num_resources = ARRAY_SIZE(wm831x_touch_resources),
1411 		.resources = wm831x_touch_resources,
1412 	},
1413 };
1414 
1415 static const struct mfd_cell rtc_devs[] = {
1416 	{
1417 		.name = "wm831x-rtc",
1418 		.num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1419 		.resources = wm831x_rtc_resources,
1420 	},
1421 };
1422 
1423 static const struct mfd_cell backlight_devs[] = {
1424 	{
1425 		.name = "wm831x-backlight",
1426 	},
1427 };
1428 
1429 struct regmap_config wm831x_regmap_config = {
1430 	.reg_bits = 16,
1431 	.val_bits = 16,
1432 
1433 	.cache_type = REGCACHE_MAPLE,
1434 
1435 	.max_register = WM831X_DBE_CHECK_DATA,
1436 	.readable_reg = wm831x_reg_readable,
1437 	.writeable_reg = wm831x_reg_writeable,
1438 	.volatile_reg = wm831x_reg_volatile,
1439 };
1440 EXPORT_SYMBOL_GPL(wm831x_regmap_config);
1441 
1442 const struct of_device_id wm831x_of_match[] = {
1443 	{ .compatible = "wlf,wm8310", .data = (void *)WM8310 },
1444 	{ .compatible = "wlf,wm8311", .data = (void *)WM8311 },
1445 	{ .compatible = "wlf,wm8312", .data = (void *)WM8312 },
1446 	{ .compatible = "wlf,wm8320", .data = (void *)WM8320 },
1447 	{ .compatible = "wlf,wm8321", .data = (void *)WM8321 },
1448 	{ .compatible = "wlf,wm8325", .data = (void *)WM8325 },
1449 	{ .compatible = "wlf,wm8326", .data = (void *)WM8326 },
1450 	{ },
1451 };
1452 EXPORT_SYMBOL_GPL(wm831x_of_match);
1453 
1454 /*
1455  * Instantiate the generic non-control parts of the device.
1456  */
1457 int wm831x_device_init(struct wm831x *wm831x, int irq)
1458 {
1459 	struct wm831x_pdata *pdata = &wm831x->pdata;
1460 	int rev, wm831x_num;
1461 	enum wm831x_parent parent;
1462 	int ret, i;
1463 
1464 	mutex_init(&wm831x->io_lock);
1465 	mutex_init(&wm831x->key_lock);
1466 	dev_set_drvdata(wm831x->dev, wm831x);
1467 
1468 	wm831x->soft_shutdown = pdata->soft_shutdown;
1469 
1470 	ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1471 	if (ret < 0) {
1472 		dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1473 		goto err;
1474 	}
1475 	switch (ret) {
1476 	case 0x6204:
1477 	case 0x6246:
1478 		break;
1479 	default:
1480 		dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1481 		ret = -EINVAL;
1482 		goto err;
1483 	}
1484 
1485 	ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1486 	if (ret < 0) {
1487 		dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1488 		goto err;
1489 	}
1490 	rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1491 
1492 	ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1493 	if (ret < 0) {
1494 		dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1495 		goto err;
1496 	}
1497 
1498 	/* Some engineering samples do not have the ID set, rely on
1499 	 * the device being registered correctly.
1500 	 */
1501 	if (ret == 0) {
1502 		dev_info(wm831x->dev, "Device is an engineering sample\n");
1503 		ret = wm831x->type;
1504 	}
1505 
1506 	switch (ret) {
1507 	case WM8310:
1508 		parent = WM8310;
1509 		wm831x->num_gpio = 16;
1510 		wm831x->charger_irq_wake = 1;
1511 		if (rev > 0) {
1512 			wm831x->has_gpio_ena = 1;
1513 			wm831x->has_cs_sts = 1;
1514 		}
1515 
1516 		dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
1517 		break;
1518 
1519 	case WM8311:
1520 		parent = WM8311;
1521 		wm831x->num_gpio = 16;
1522 		wm831x->charger_irq_wake = 1;
1523 		if (rev > 0) {
1524 			wm831x->has_gpio_ena = 1;
1525 			wm831x->has_cs_sts = 1;
1526 		}
1527 
1528 		dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
1529 		break;
1530 
1531 	case WM8312:
1532 		parent = WM8312;
1533 		wm831x->num_gpio = 16;
1534 		wm831x->charger_irq_wake = 1;
1535 		if (rev > 0) {
1536 			wm831x->has_gpio_ena = 1;
1537 			wm831x->has_cs_sts = 1;
1538 		}
1539 
1540 		dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
1541 		break;
1542 
1543 	case WM8320:
1544 		parent = WM8320;
1545 		wm831x->num_gpio = 12;
1546 		dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);
1547 		break;
1548 
1549 	case WM8321:
1550 		parent = WM8321;
1551 		wm831x->num_gpio = 12;
1552 		dev_info(wm831x->dev, "WM8321 revision %c\n", 'A' + rev);
1553 		break;
1554 
1555 	case WM8325:
1556 		parent = WM8325;
1557 		wm831x->num_gpio = 12;
1558 		dev_info(wm831x->dev, "WM8325 revision %c\n", 'A' + rev);
1559 		break;
1560 
1561 	case WM8326:
1562 		parent = WM8326;
1563 		wm831x->num_gpio = 12;
1564 		dev_info(wm831x->dev, "WM8326 revision %c\n", 'A' + rev);
1565 		break;
1566 
1567 	default:
1568 		dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1569 		ret = -EINVAL;
1570 		goto err;
1571 	}
1572 
1573 	/* This will need revisiting in future but is OK for all
1574 	 * current parts.
1575 	 */
1576 	if (parent != wm831x->type)
1577 		dev_warn(wm831x->dev, "Device was registered as a WM%x\n",
1578 			 wm831x->type);
1579 
1580 	/* Bootstrap the user key */
1581 	ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1582 	if (ret < 0) {
1583 		dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1584 		goto err;
1585 	}
1586 	if (ret != 0) {
1587 		dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1588 			 ret);
1589 		wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1590 	}
1591 	wm831x->locked = 1;
1592 
1593 	if (pdata->pre_init) {
1594 		ret = pdata->pre_init(wm831x);
1595 		if (ret != 0) {
1596 			dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1597 			goto err;
1598 		}
1599 	}
1600 
1601 	for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
1602 		if (!pdata->gpio_defaults[i])
1603 			continue;
1604 
1605 		wm831x_reg_write(wm831x,
1606 				 WM831X_GPIO1_CONTROL + i,
1607 				 pdata->gpio_defaults[i] & 0xffff);
1608 	}
1609 
1610 	/* Multiply by 10 as we have many subdevices of the same type */
1611 	if (pdata->wm831x_num)
1612 		wm831x_num = pdata->wm831x_num * 10;
1613 	else
1614 		wm831x_num = -1;
1615 
1616 	ret = wm831x_irq_init(wm831x, irq);
1617 	if (ret != 0)
1618 		goto err;
1619 
1620 	wm831x_auxadc_init(wm831x);
1621 
1622 	/* The core device is up, instantiate the subdevices. */
1623 	switch (parent) {
1624 	case WM8310:
1625 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1626 				      wm8310_devs, ARRAY_SIZE(wm8310_devs),
1627 				      NULL, 0, NULL);
1628 		break;
1629 
1630 	case WM8311:
1631 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1632 				      wm8311_devs, ARRAY_SIZE(wm8311_devs),
1633 				      NULL, 0, NULL);
1634 		if (!pdata->disable_touch)
1635 			mfd_add_devices(wm831x->dev, wm831x_num,
1636 					touch_devs, ARRAY_SIZE(touch_devs),
1637 					NULL, 0, NULL);
1638 		break;
1639 
1640 	case WM8312:
1641 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1642 				      wm8312_devs, ARRAY_SIZE(wm8312_devs),
1643 				      NULL, 0, NULL);
1644 		if (!pdata->disable_touch)
1645 			mfd_add_devices(wm831x->dev, wm831x_num,
1646 					touch_devs, ARRAY_SIZE(touch_devs),
1647 					NULL, 0, NULL);
1648 		break;
1649 
1650 	case WM8320:
1651 	case WM8321:
1652 	case WM8325:
1653 	case WM8326:
1654 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1655 				      wm8320_devs, ARRAY_SIZE(wm8320_devs),
1656 				      NULL, 0, NULL);
1657 		break;
1658 
1659 	default:
1660 		/* If this happens the bus probe function is buggy */
1661 		BUG();
1662 	}
1663 
1664 	if (ret != 0) {
1665 		dev_err(wm831x->dev, "Failed to add children\n");
1666 		goto err_irq;
1667 	}
1668 
1669 	/* The RTC can only be used if the 32.768kHz crystal is
1670 	 * enabled; this can't be controlled by software at runtime.
1671 	 */
1672 	ret = wm831x_reg_read(wm831x, WM831X_CLOCK_CONTROL_2);
1673 	if (ret < 0) {
1674 		dev_err(wm831x->dev, "Failed to read clock status: %d\n", ret);
1675 		goto err_irq;
1676 	}
1677 
1678 	if (ret & WM831X_XTAL_ENA) {
1679 		ret = mfd_add_devices(wm831x->dev, wm831x_num,
1680 				      rtc_devs, ARRAY_SIZE(rtc_devs),
1681 				      NULL, 0, NULL);
1682 		if (ret != 0) {
1683 			dev_err(wm831x->dev, "Failed to add RTC: %d\n", ret);
1684 			goto err_irq;
1685 		}
1686 	} else {
1687 		dev_info(wm831x->dev, "32.768kHz clock disabled, no RTC\n");
1688 	}
1689 
1690 	if (pdata->backlight) {
1691 		/* Treat errors as non-critical */
1692 		ret = mfd_add_devices(wm831x->dev, wm831x_num, backlight_devs,
1693 				      ARRAY_SIZE(backlight_devs), NULL,
1694 				      0, NULL);
1695 		if (ret < 0)
1696 			dev_err(wm831x->dev, "Failed to add backlight: %d\n",
1697 				ret);
1698 	}
1699 
1700 	wm831x_otp_init(wm831x);
1701 
1702 	if (pdata->post_init) {
1703 		ret = pdata->post_init(wm831x);
1704 		if (ret != 0) {
1705 			dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1706 			goto err_irq;
1707 		}
1708 	}
1709 
1710 	return 0;
1711 
1712 err_irq:
1713 	wm831x_irq_exit(wm831x);
1714 err:
1715 	mfd_remove_devices(wm831x->dev);
1716 	return ret;
1717 }
1718 
1719 int wm831x_device_suspend(struct wm831x *wm831x)
1720 {
1721 	int reg, mask;
1722 
1723 	/* If the charger IRQs are a wake source then make sure we ack
1724 	 * them even if they're not actively being used (eg, no power
1725 	 * driver or no IRQ line wired up) then acknowledge the
1726 	 * interrupts otherwise suspend won't last very long.
1727 	 */
1728 	if (wm831x->charger_irq_wake) {
1729 		reg = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_2_MASK);
1730 
1731 		mask = WM831X_CHG_BATT_HOT_EINT |
1732 			WM831X_CHG_BATT_COLD_EINT |
1733 			WM831X_CHG_BATT_FAIL_EINT |
1734 			WM831X_CHG_OV_EINT | WM831X_CHG_END_EINT |
1735 			WM831X_CHG_TO_EINT | WM831X_CHG_MODE_EINT |
1736 			WM831X_CHG_START_EINT;
1737 
1738 		/* If any of the interrupts are masked read the statuses */
1739 		if (reg & mask)
1740 			reg = wm831x_reg_read(wm831x,
1741 					      WM831X_INTERRUPT_STATUS_2);
1742 
1743 		if (reg & mask) {
1744 			dev_info(wm831x->dev,
1745 				 "Acknowledging masked charger IRQs: %x\n",
1746 				 reg & mask);
1747 			wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_2,
1748 					 reg & mask);
1749 		}
1750 	}
1751 
1752 	return 0;
1753 }
1754 
1755 void wm831x_device_shutdown(struct wm831x *wm831x)
1756 {
1757 	if (wm831x->soft_shutdown) {
1758 		dev_info(wm831x->dev, "Initiating shutdown...\n");
1759 		wm831x_set_bits(wm831x, WM831X_POWER_STATE, WM831X_CHIP_ON, 0);
1760 	}
1761 }
1762 EXPORT_SYMBOL_GPL(wm831x_device_shutdown);
1763