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tty/serial: atmel_serial: whitespace and braces modifications
[zen-stable.git] / drivers / mfd / wm831x-core.c
blob282e76ab678f15c4cb3d792f571f47e04f6fd872
1 /*
2 * wm831x-core.c -- Device access for Wolfson WM831x PMICs
3 *
4 * Copyright 2009 Wolfson Microelectronics PLC.
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/bcd.h>
18 #include <linux/delay.h>
19 #include <linux/mfd/core.h>
20 #include <linux/slab.h>
21
22 #include <linux/mfd/wm831x/core.h>
23 #include <linux/mfd/wm831x/pdata.h>
24 #include <linux/mfd/wm831x/irq.h>
25 #include <linux/mfd/wm831x/auxadc.h>
26 #include <linux/mfd/wm831x/otp.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 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 int wm831x_read(struct wm831x *wm831x, unsigned short reg,
164 int bytes, void *dest)
165 {
166 int ret, i;
167 u16 *buf = dest;
168
169 BUG_ON(bytes % 2);
170 BUG_ON(bytes <= 0);
171
172 ret = wm831x->read_dev(wm831x, reg, bytes, dest);
173 if (ret < 0)
174 return ret;
175
176 for (i = 0; i < bytes / 2; i++) {
177 buf[i] = be16_to_cpu(buf[i]);
178
179 dev_vdbg(wm831x->dev, "Read %04x from R%d(0x%x)\n",
180 buf[i], reg + i, reg + i);
181 }
182
183 return 0;
184 }
185
186 /**
187 * wm831x_reg_read: Read a single WM831x register.
188 *
189 * @wm831x: Device to read from.
190 * @reg: Register to read.
191 */
192 int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
193 {
194 unsigned short val;
195 int ret;
196
197 mutex_lock(&wm831x->io_lock);
198
199 ret = wm831x_read(wm831x, reg, 2, &val);
200
201 mutex_unlock(&wm831x->io_lock);
202
203 if (ret < 0)
204 return ret;
205 else
206 return val;
207 }
208 EXPORT_SYMBOL_GPL(wm831x_reg_read);
209
210 /**
211 * wm831x_bulk_read: Read multiple WM831x registers
212 *
213 * @wm831x: Device to read from
214 * @reg: First register
215 * @count: Number of registers
216 * @buf: Buffer to fill.
217 */
218 int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
219 int count, u16 *buf)
220 {
221 int ret;
222
223 mutex_lock(&wm831x->io_lock);
224
225 ret = wm831x_read(wm831x, reg, count * 2, buf);
226
227 mutex_unlock(&wm831x->io_lock);
228
229 return ret;
230 }
231 EXPORT_SYMBOL_GPL(wm831x_bulk_read);
232
233 static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
234 int bytes, void *src)
235 {
236 u16 *buf = src;
237 int i;
238
239 BUG_ON(bytes % 2);
240 BUG_ON(bytes <= 0);
241
242 for (i = 0; i < bytes / 2; i++) {
243 if (wm831x_reg_locked(wm831x, reg))
244 return -EPERM;
245
246 dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
247 buf[i], reg + i, reg + i);
248
249 buf[i] = cpu_to_be16(buf[i]);
250 }
251
252 return wm831x->write_dev(wm831x, reg, bytes, src);
253 }
254
255 /**
256 * wm831x_reg_write: Write a single WM831x register.
257 *
258 * @wm831x: Device to write to.
259 * @reg: Register to write to.
260 * @val: Value to write.
261 */
262 int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg,
263 unsigned short val)
264 {
265 int ret;
266
267 mutex_lock(&wm831x->io_lock);
268
269 ret = wm831x_write(wm831x, reg, 2, &val);
270
271 mutex_unlock(&wm831x->io_lock);
272
273 return ret;
274 }
275 EXPORT_SYMBOL_GPL(wm831x_reg_write);
276
277 /**
278 * wm831x_set_bits: Set the value of a bitfield in a WM831x register
279 *
280 * @wm831x: Device to write to.
281 * @reg: Register to write to.
282 * @mask: Mask of bits to set.
283 * @val: Value to set (unshifted)
284 */
285 int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
286 unsigned short mask, unsigned short val)
287 {
288 int ret;
289 u16 r;
290
291 mutex_lock(&wm831x->io_lock);
292
293 ret = wm831x_read(wm831x, reg, 2, &r);
294 if (ret < 0)
295 goto out;
296
297 r &= ~mask;
298 r |= val & mask;
299
300 ret = wm831x_write(wm831x, reg, 2, &r);
301
302 out:
303 mutex_unlock(&wm831x->io_lock);
304
305 return ret;
306 }
307 EXPORT_SYMBOL_GPL(wm831x_set_bits);
308
309 static struct resource wm831x_dcdc1_resources[] = {
310 {
311 .start = WM831X_DC1_CONTROL_1,
312 .end = WM831X_DC1_DVS_CONTROL,
313 .flags = IORESOURCE_IO,
314 },
315 {
316 .name = "UV",
317 .start = WM831X_IRQ_UV_DC1,
318 .end = WM831X_IRQ_UV_DC1,
319 .flags = IORESOURCE_IRQ,
320 },
321 {
322 .name = "HC",
323 .start = WM831X_IRQ_HC_DC1,
324 .end = WM831X_IRQ_HC_DC1,
325 .flags = IORESOURCE_IRQ,
326 },
327 };
328
329
330 static struct resource wm831x_dcdc2_resources[] = {
331 {
332 .start = WM831X_DC2_CONTROL_1,
333 .end = WM831X_DC2_DVS_CONTROL,
334 .flags = IORESOURCE_IO,
335 },
336 {
337 .name = "UV",
338 .start = WM831X_IRQ_UV_DC2,
339 .end = WM831X_IRQ_UV_DC2,
340 .flags = IORESOURCE_IRQ,
341 },
342 {
343 .name = "HC",
344 .start = WM831X_IRQ_HC_DC2,
345 .end = WM831X_IRQ_HC_DC2,
346 .flags = IORESOURCE_IRQ,
347 },
348 };
349
350 static struct resource wm831x_dcdc3_resources[] = {
351 {
352 .start = WM831X_DC3_CONTROL_1,
353 .end = WM831X_DC3_SLEEP_CONTROL,
354 .flags = IORESOURCE_IO,
355 },
356 {
357 .name = "UV",
358 .start = WM831X_IRQ_UV_DC3,
359 .end = WM831X_IRQ_UV_DC3,
360 .flags = IORESOURCE_IRQ,
361 },
362 };
363
364 static struct resource wm831x_dcdc4_resources[] = {
365 {
366 .start = WM831X_DC4_CONTROL,
367 .end = WM831X_DC4_SLEEP_CONTROL,
368 .flags = IORESOURCE_IO,
369 },
370 {
371 .name = "UV",
372 .start = WM831X_IRQ_UV_DC4,
373 .end = WM831X_IRQ_UV_DC4,
374 .flags = IORESOURCE_IRQ,
375 },
376 };
377
378 static struct resource wm8320_dcdc4_buck_resources[] = {
379 {
380 .start = WM831X_DC4_CONTROL,
381 .end = WM832X_DC4_SLEEP_CONTROL,
382 .flags = IORESOURCE_IO,
383 },
384 {
385 .name = "UV",
386 .start = WM831X_IRQ_UV_DC4,
387 .end = WM831X_IRQ_UV_DC4,
388 .flags = IORESOURCE_IRQ,
389 },
390 };
391
392 static struct resource wm831x_gpio_resources[] = {
393 {
394 .start = WM831X_IRQ_GPIO_1,
395 .end = WM831X_IRQ_GPIO_16,
396 .flags = IORESOURCE_IRQ,
397 },
398 };
399
400 static struct resource wm831x_isink1_resources[] = {
401 {
402 .start = WM831X_CURRENT_SINK_1,
403 .end = WM831X_CURRENT_SINK_1,
404 .flags = IORESOURCE_IO,
405 },
406 {
407 .start = WM831X_IRQ_CS1,
408 .end = WM831X_IRQ_CS1,
409 .flags = IORESOURCE_IRQ,
410 },
411 };
412
413 static struct resource wm831x_isink2_resources[] = {
414 {
415 .start = WM831X_CURRENT_SINK_2,
416 .end = WM831X_CURRENT_SINK_2,
417 .flags = IORESOURCE_IO,
418 },
419 {
420 .start = WM831X_IRQ_CS2,
421 .end = WM831X_IRQ_CS2,
422 .flags = IORESOURCE_IRQ,
423 },
424 };
425
426 static struct resource wm831x_ldo1_resources[] = {
427 {
428 .start = WM831X_LDO1_CONTROL,
429 .end = WM831X_LDO1_SLEEP_CONTROL,
430 .flags = IORESOURCE_IO,
431 },
432 {
433 .name = "UV",
434 .start = WM831X_IRQ_UV_LDO1,
435 .end = WM831X_IRQ_UV_LDO1,
436 .flags = IORESOURCE_IRQ,
437 },
438 };
439
440 static struct resource wm831x_ldo2_resources[] = {
441 {
442 .start = WM831X_LDO2_CONTROL,
443 .end = WM831X_LDO2_SLEEP_CONTROL,
444 .flags = IORESOURCE_IO,
445 },
446 {
447 .name = "UV",
448 .start = WM831X_IRQ_UV_LDO2,
449 .end = WM831X_IRQ_UV_LDO2,
450 .flags = IORESOURCE_IRQ,
451 },
452 };
453
454 static struct resource wm831x_ldo3_resources[] = {
455 {
456 .start = WM831X_LDO3_CONTROL,
457 .end = WM831X_LDO3_SLEEP_CONTROL,
458 .flags = IORESOURCE_IO,
459 },
460 {
461 .name = "UV",
462 .start = WM831X_IRQ_UV_LDO3,
463 .end = WM831X_IRQ_UV_LDO3,
464 .flags = IORESOURCE_IRQ,
465 },
466 };
467
468 static struct resource wm831x_ldo4_resources[] = {
469 {
470 .start = WM831X_LDO4_CONTROL,
471 .end = WM831X_LDO4_SLEEP_CONTROL,
472 .flags = IORESOURCE_IO,
473 },
474 {
475 .name = "UV",
476 .start = WM831X_IRQ_UV_LDO4,
477 .end = WM831X_IRQ_UV_LDO4,
478 .flags = IORESOURCE_IRQ,
479 },
480 };
481
482 static struct resource wm831x_ldo5_resources[] = {
483 {
484 .start = WM831X_LDO5_CONTROL,
485 .end = WM831X_LDO5_SLEEP_CONTROL,
486 .flags = IORESOURCE_IO,
487 },
488 {
489 .name = "UV",
490 .start = WM831X_IRQ_UV_LDO5,
491 .end = WM831X_IRQ_UV_LDO5,
492 .flags = IORESOURCE_IRQ,
493 },
494 };
495
496 static struct resource wm831x_ldo6_resources[] = {
497 {
498 .start = WM831X_LDO6_CONTROL,
499 .end = WM831X_LDO6_SLEEP_CONTROL,
500 .flags = IORESOURCE_IO,
501 },
502 {
503 .name = "UV",
504 .start = WM831X_IRQ_UV_LDO6,
505 .end = WM831X_IRQ_UV_LDO6,
506 .flags = IORESOURCE_IRQ,
507 },
508 };
509
510 static struct resource wm831x_ldo7_resources[] = {
511 {
512 .start = WM831X_LDO7_CONTROL,
513 .end = WM831X_LDO7_SLEEP_CONTROL,
514 .flags = IORESOURCE_IO,
515 },
516 {
517 .name = "UV",
518 .start = WM831X_IRQ_UV_LDO7,
519 .end = WM831X_IRQ_UV_LDO7,
520 .flags = IORESOURCE_IRQ,
521 },
522 };
523
524 static struct resource wm831x_ldo8_resources[] = {
525 {
526 .start = WM831X_LDO8_CONTROL,
527 .end = WM831X_LDO8_SLEEP_CONTROL,
528 .flags = IORESOURCE_IO,
529 },
530 {
531 .name = "UV",
532 .start = WM831X_IRQ_UV_LDO8,
533 .end = WM831X_IRQ_UV_LDO8,
534 .flags = IORESOURCE_IRQ,
535 },
536 };
537
538 static struct resource wm831x_ldo9_resources[] = {
539 {
540 .start = WM831X_LDO9_CONTROL,
541 .end = WM831X_LDO9_SLEEP_CONTROL,
542 .flags = IORESOURCE_IO,
543 },
544 {
545 .name = "UV",
546 .start = WM831X_IRQ_UV_LDO9,
547 .end = WM831X_IRQ_UV_LDO9,
548 .flags = IORESOURCE_IRQ,
549 },
550 };
551
552 static struct resource wm831x_ldo10_resources[] = {
553 {
554 .start = WM831X_LDO10_CONTROL,
555 .end = WM831X_LDO10_SLEEP_CONTROL,
556 .flags = IORESOURCE_IO,
557 },
558 {
559 .name = "UV",
560 .start = WM831X_IRQ_UV_LDO10,
561 .end = WM831X_IRQ_UV_LDO10,
562 .flags = IORESOURCE_IRQ,
563 },
564 };
565
566 static struct resource wm831x_ldo11_resources[] = {
567 {
568 .start = WM831X_LDO11_ON_CONTROL,
569 .end = WM831X_LDO11_SLEEP_CONTROL,
570 .flags = IORESOURCE_IO,
571 },
572 };
573
574 static struct resource wm831x_on_resources[] = {
575 {
576 .start = WM831X_IRQ_ON,
577 .end = WM831X_IRQ_ON,
578 .flags = IORESOURCE_IRQ,
579 },
580 };
581
582
583 static struct resource wm831x_power_resources[] = {
584 {
585 .name = "SYSLO",
586 .start = WM831X_IRQ_PPM_SYSLO,
587 .end = WM831X_IRQ_PPM_SYSLO,
588 .flags = IORESOURCE_IRQ,
589 },
590 {
591 .name = "PWR SRC",
592 .start = WM831X_IRQ_PPM_PWR_SRC,
593 .end = WM831X_IRQ_PPM_PWR_SRC,
594 .flags = IORESOURCE_IRQ,
595 },
596 {
597 .name = "USB CURR",
598 .start = WM831X_IRQ_PPM_USB_CURR,
599 .end = WM831X_IRQ_PPM_USB_CURR,
600 .flags = IORESOURCE_IRQ,
601 },
602 {
603 .name = "BATT HOT",
604 .start = WM831X_IRQ_CHG_BATT_HOT,
605 .end = WM831X_IRQ_CHG_BATT_HOT,
606 .flags = IORESOURCE_IRQ,
607 },
608 {
609 .name = "BATT COLD",
610 .start = WM831X_IRQ_CHG_BATT_COLD,
611 .end = WM831X_IRQ_CHG_BATT_COLD,
612 .flags = IORESOURCE_IRQ,
613 },
614 {
615 .name = "BATT FAIL",
616 .start = WM831X_IRQ_CHG_BATT_FAIL,
617 .end = WM831X_IRQ_CHG_BATT_FAIL,
618 .flags = IORESOURCE_IRQ,
619 },
620 {
621 .name = "OV",
622 .start = WM831X_IRQ_CHG_OV,
623 .end = WM831X_IRQ_CHG_OV,
624 .flags = IORESOURCE_IRQ,
625 },
626 {
627 .name = "END",
628 .start = WM831X_IRQ_CHG_END,
629 .end = WM831X_IRQ_CHG_END,
630 .flags = IORESOURCE_IRQ,
631 },
632 {
633 .name = "TO",
634 .start = WM831X_IRQ_CHG_TO,
635 .end = WM831X_IRQ_CHG_TO,
636 .flags = IORESOURCE_IRQ,
637 },
638 {
639 .name = "MODE",
640 .start = WM831X_IRQ_CHG_MODE,
641 .end = WM831X_IRQ_CHG_MODE,
642 .flags = IORESOURCE_IRQ,
643 },
644 {
645 .name = "START",
646 .start = WM831X_IRQ_CHG_START,
647 .end = WM831X_IRQ_CHG_START,
648 .flags = IORESOURCE_IRQ,
649 },
650 };
651
652 static struct resource wm831x_rtc_resources[] = {
653 {
654 .name = "PER",
655 .start = WM831X_IRQ_RTC_PER,
656 .end = WM831X_IRQ_RTC_PER,
657 .flags = IORESOURCE_IRQ,
658 },
659 {
660 .name = "ALM",
661 .start = WM831X_IRQ_RTC_ALM,
662 .end = WM831X_IRQ_RTC_ALM,
663 .flags = IORESOURCE_IRQ,
664 },
665 };
666
667 static struct resource wm831x_status1_resources[] = {
668 {
669 .start = WM831X_STATUS_LED_1,
670 .end = WM831X_STATUS_LED_1,
671 .flags = IORESOURCE_IO,
672 },
673 };
674
675 static struct resource wm831x_status2_resources[] = {
676 {
677 .start = WM831X_STATUS_LED_2,
678 .end = WM831X_STATUS_LED_2,
679 .flags = IORESOURCE_IO,
680 },
681 };
682
683 static struct resource wm831x_touch_resources[] = {
684 {
685 .name = "TCHPD",
686 .start = WM831X_IRQ_TCHPD,
687 .end = WM831X_IRQ_TCHPD,
688 .flags = IORESOURCE_IRQ,
689 },
690 {
691 .name = "TCHDATA",
692 .start = WM831X_IRQ_TCHDATA,
693 .end = WM831X_IRQ_TCHDATA,
694 .flags = IORESOURCE_IRQ,
695 },
696 };
697
698 static struct resource wm831x_wdt_resources[] = {
699 {
700 .start = WM831X_IRQ_WDOG_TO,
701 .end = WM831X_IRQ_WDOG_TO,
702 .flags = IORESOURCE_IRQ,
703 },
704 };
705
706 static struct mfd_cell wm8310_devs[] = {
707 {
708 .name = "wm831x-backup",
709 },
710 {
711 .name = "wm831x-buckv",
712 .id = 1,
713 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
714 .resources = wm831x_dcdc1_resources,
715 },
716 {
717 .name = "wm831x-buckv",
718 .id = 2,
719 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
720 .resources = wm831x_dcdc2_resources,
721 },
722 {
723 .name = "wm831x-buckp",
724 .id = 3,
725 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
726 .resources = wm831x_dcdc3_resources,
727 },
728 {
729 .name = "wm831x-boostp",
730 .id = 4,
731 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
732 .resources = wm831x_dcdc4_resources,
733 },
734 {
735 .name = "wm831x-clk",
736 },
737 {
738 .name = "wm831x-epe",
739 .id = 1,
740 },
741 {
742 .name = "wm831x-epe",
743 .id = 2,
744 },
745 {
746 .name = "wm831x-gpio",
747 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
748 .resources = wm831x_gpio_resources,
749 },
750 {
751 .name = "wm831x-hwmon",
752 },
753 {
754 .name = "wm831x-isink",
755 .id = 1,
756 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
757 .resources = wm831x_isink1_resources,
758 },
759 {
760 .name = "wm831x-isink",
761 .id = 2,
762 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
763 .resources = wm831x_isink2_resources,
764 },
765 {
766 .name = "wm831x-ldo",
767 .id = 1,
768 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
769 .resources = wm831x_ldo1_resources,
770 },
771 {
772 .name = "wm831x-ldo",
773 .id = 2,
774 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
775 .resources = wm831x_ldo2_resources,
776 },
777 {
778 .name = "wm831x-ldo",
779 .id = 3,
780 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
781 .resources = wm831x_ldo3_resources,
782 },
783 {
784 .name = "wm831x-ldo",
785 .id = 4,
786 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
787 .resources = wm831x_ldo4_resources,
788 },
789 {
790 .name = "wm831x-ldo",
791 .id = 5,
792 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
793 .resources = wm831x_ldo5_resources,
794 },
795 {
796 .name = "wm831x-ldo",
797 .id = 6,
798 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
799 .resources = wm831x_ldo6_resources,
800 },
801 {
802 .name = "wm831x-aldo",
803 .id = 7,
804 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
805 .resources = wm831x_ldo7_resources,
806 },
807 {
808 .name = "wm831x-aldo",
809 .id = 8,
810 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
811 .resources = wm831x_ldo8_resources,
812 },
813 {
814 .name = "wm831x-aldo",
815 .id = 9,
816 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
817 .resources = wm831x_ldo9_resources,
818 },
819 {
820 .name = "wm831x-aldo",
821 .id = 10,
822 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
823 .resources = wm831x_ldo10_resources,
824 },
825 {
826 .name = "wm831x-alive-ldo",
827 .id = 11,
828 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
829 .resources = wm831x_ldo11_resources,
830 },
831 {
832 .name = "wm831x-on",
833 .num_resources = ARRAY_SIZE(wm831x_on_resources),
834 .resources = wm831x_on_resources,
835 },
836 {
837 .name = "wm831x-power",
838 .num_resources = ARRAY_SIZE(wm831x_power_resources),
839 .resources = wm831x_power_resources,
840 },
841 {
842 .name = "wm831x-status",
843 .id = 1,
844 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
845 .resources = wm831x_status1_resources,
846 },
847 {
848 .name = "wm831x-status",
849 .id = 2,
850 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
851 .resources = wm831x_status2_resources,
852 },
853 {
854 .name = "wm831x-watchdog",
855 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
856 .resources = wm831x_wdt_resources,
857 },
858 };
859
860 static struct mfd_cell wm8311_devs[] = {
861 {
862 .name = "wm831x-backup",
863 },
864 {
865 .name = "wm831x-buckv",
866 .id = 1,
867 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
868 .resources = wm831x_dcdc1_resources,
869 },
870 {
871 .name = "wm831x-buckv",
872 .id = 2,
873 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
874 .resources = wm831x_dcdc2_resources,
875 },
876 {
877 .name = "wm831x-buckp",
878 .id = 3,
879 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
880 .resources = wm831x_dcdc3_resources,
881 },
882 {
883 .name = "wm831x-boostp",
884 .id = 4,
885 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
886 .resources = wm831x_dcdc4_resources,
887 },
888 {
889 .name = "wm831x-clk",
890 },
891 {
892 .name = "wm831x-epe",
893 .id = 1,
894 },
895 {
896 .name = "wm831x-epe",
897 .id = 2,
898 },
899 {
900 .name = "wm831x-gpio",
901 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
902 .resources = wm831x_gpio_resources,
903 },
904 {
905 .name = "wm831x-hwmon",
906 },
907 {
908 .name = "wm831x-isink",
909 .id = 1,
910 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
911 .resources = wm831x_isink1_resources,
912 },
913 {
914 .name = "wm831x-isink",
915 .id = 2,
916 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
917 .resources = wm831x_isink2_resources,
918 },
919 {
920 .name = "wm831x-ldo",
921 .id = 1,
922 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
923 .resources = wm831x_ldo1_resources,
924 },
925 {
926 .name = "wm831x-ldo",
927 .id = 2,
928 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
929 .resources = wm831x_ldo2_resources,
930 },
931 {
932 .name = "wm831x-ldo",
933 .id = 3,
934 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
935 .resources = wm831x_ldo3_resources,
936 },
937 {
938 .name = "wm831x-ldo",
939 .id = 4,
940 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
941 .resources = wm831x_ldo4_resources,
942 },
943 {
944 .name = "wm831x-ldo",
945 .id = 5,
946 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
947 .resources = wm831x_ldo5_resources,
948 },
949 {
950 .name = "wm831x-aldo",
951 .id = 7,
952 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
953 .resources = wm831x_ldo7_resources,
954 },
955 {
956 .name = "wm831x-alive-ldo",
957 .id = 11,
958 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
959 .resources = wm831x_ldo11_resources,
960 },
961 {
962 .name = "wm831x-on",
963 .num_resources = ARRAY_SIZE(wm831x_on_resources),
964 .resources = wm831x_on_resources,
965 },
966 {
967 .name = "wm831x-power",
968 .num_resources = ARRAY_SIZE(wm831x_power_resources),
969 .resources = wm831x_power_resources,
970 },
971 {
972 .name = "wm831x-status",
973 .id = 1,
974 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
975 .resources = wm831x_status1_resources,
976 },
977 {
978 .name = "wm831x-status",
979 .id = 2,
980 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
981 .resources = wm831x_status2_resources,
982 },
983 {
984 .name = "wm831x-watchdog",
985 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
986 .resources = wm831x_wdt_resources,
987 },
988 };
989
990 static struct mfd_cell wm8312_devs[] = {
991 {
992 .name = "wm831x-backup",
993 },
994 {
995 .name = "wm831x-buckv",
996 .id = 1,
997 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
998 .resources = wm831x_dcdc1_resources,
999 },
1000 {
1001 .name = "wm831x-buckv",
1002 .id = 2,
1003 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1004 .resources = wm831x_dcdc2_resources,
1005 },
1006 {
1007 .name = "wm831x-buckp",
1008 .id = 3,
1009 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1010 .resources = wm831x_dcdc3_resources,
1011 },
1012 {
1013 .name = "wm831x-boostp",
1014 .id = 4,
1015 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1016 .resources = wm831x_dcdc4_resources,
1017 },
1018 {
1019 .name = "wm831x-clk",
1020 },
1021 {
1022 .name = "wm831x-epe",
1023 .id = 1,
1024 },
1025 {
1026 .name = "wm831x-epe",
1027 .id = 2,
1028 },
1029 {
1030 .name = "wm831x-gpio",
1031 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1032 .resources = wm831x_gpio_resources,
1033 },
1034 {
1035 .name = "wm831x-hwmon",
1036 },
1037 {
1038 .name = "wm831x-isink",
1039 .id = 1,
1040 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1041 .resources = wm831x_isink1_resources,
1042 },
1043 {
1044 .name = "wm831x-isink",
1045 .id = 2,
1046 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1047 .resources = wm831x_isink2_resources,
1048 },
1049 {
1050 .name = "wm831x-ldo",
1051 .id = 1,
1052 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1053 .resources = wm831x_ldo1_resources,
1054 },
1055 {
1056 .name = "wm831x-ldo",
1057 .id = 2,
1058 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1059 .resources = wm831x_ldo2_resources,
1060 },
1061 {
1062 .name = "wm831x-ldo",
1063 .id = 3,
1064 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1065 .resources = wm831x_ldo3_resources,
1066 },
1067 {
1068 .name = "wm831x-ldo",
1069 .id = 4,
1070 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1071 .resources = wm831x_ldo4_resources,
1072 },
1073 {
1074 .name = "wm831x-ldo",
1075 .id = 5,
1076 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1077 .resources = wm831x_ldo5_resources,
1078 },
1079 {
1080 .name = "wm831x-ldo",
1081 .id = 6,
1082 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1083 .resources = wm831x_ldo6_resources,
1084 },
1085 {
1086 .name = "wm831x-aldo",
1087 .id = 7,
1088 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1089 .resources = wm831x_ldo7_resources,
1090 },
1091 {
1092 .name = "wm831x-aldo",
1093 .id = 8,
1094 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1095 .resources = wm831x_ldo8_resources,
1096 },
1097 {
1098 .name = "wm831x-aldo",
1099 .id = 9,
1100 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1101 .resources = wm831x_ldo9_resources,
1102 },
1103 {
1104 .name = "wm831x-aldo",
1105 .id = 10,
1106 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1107 .resources = wm831x_ldo10_resources,
1108 },
1109 {
1110 .name = "wm831x-alive-ldo",
1111 .id = 11,
1112 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1113 .resources = wm831x_ldo11_resources,
1114 },
1115 {
1116 .name = "wm831x-on",
1117 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1118 .resources = wm831x_on_resources,
1119 },
1120 {
1121 .name = "wm831x-power",
1122 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1123 .resources = wm831x_power_resources,
1124 },
1125 {
1126 .name = "wm831x-status",
1127 .id = 1,
1128 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1129 .resources = wm831x_status1_resources,
1130 },
1131 {
1132 .name = "wm831x-status",
1133 .id = 2,
1134 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1135 .resources = wm831x_status2_resources,
1136 },
1137 {
1138 .name = "wm831x-watchdog",
1139 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1140 .resources = wm831x_wdt_resources,
1141 },
1142 };
1143
1144 static struct mfd_cell wm8320_devs[] = {
1145 {
1146 .name = "wm831x-backup",
1147 },
1148 {
1149 .name = "wm831x-buckv",
1150 .id = 1,
1151 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1152 .resources = wm831x_dcdc1_resources,
1153 },
1154 {
1155 .name = "wm831x-buckv",
1156 .id = 2,
1157 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1158 .resources = wm831x_dcdc2_resources,
1159 },
1160 {
1161 .name = "wm831x-buckp",
1162 .id = 3,
1163 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1164 .resources = wm831x_dcdc3_resources,
1165 },
1166 {
1167 .name = "wm831x-buckp",
1168 .id = 4,
1169 .num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
1170 .resources = wm8320_dcdc4_buck_resources,
1171 },
1172 {
1173 .name = "wm831x-clk",
1174 },
1175 {
1176 .name = "wm831x-gpio",
1177 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1178 .resources = wm831x_gpio_resources,
1179 },
1180 {
1181 .name = "wm831x-hwmon",
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-status",
1256 .id = 1,
1257 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1258 .resources = wm831x_status1_resources,
1259 },
1260 {
1261 .name = "wm831x-status",
1262 .id = 2,
1263 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1264 .resources = wm831x_status2_resources,
1265 },
1266 {
1267 .name = "wm831x-watchdog",
1268 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1269 .resources = wm831x_wdt_resources,
1270 },
1271 };
1272
1273 static struct mfd_cell touch_devs[] = {
1274 {
1275 .name = "wm831x-touch",
1276 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1277 .resources = wm831x_touch_resources,
1278 },
1279 };
1280
1281 static struct mfd_cell rtc_devs[] = {
1282 {
1283 .name = "wm831x-rtc",
1284 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1285 .resources = wm831x_rtc_resources,
1286 },
1287 };
1288
1289 static struct mfd_cell backlight_devs[] = {
1290 {
1291 .name = "wm831x-backlight",
1292 },
1293 };
1294
1295 /*
1296 * Instantiate the generic non-control parts of the device.
1297 */
1298 int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
1299 {
1300 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
1301 int rev, wm831x_num;
1302 enum wm831x_parent parent;
1303 int ret, i;
1304
1305 mutex_init(&wm831x->io_lock);
1306 mutex_init(&wm831x->key_lock);
1307 dev_set_drvdata(wm831x->dev, wm831x);
1308
1309 ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1310 if (ret < 0) {
1311 dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1312 goto err;
1313 }
1314 switch (ret) {
1315 case 0x6204:
1316 case 0x6246:
1317 break;
1318 default:
1319 dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1320 ret = -EINVAL;
1321 goto err;
1322 }
1323
1324 ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1325 if (ret < 0) {
1326 dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1327 goto err;
1328 }
1329 rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1330
1331 ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1332 if (ret < 0) {
1333 dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1334 goto err;
1335 }
1336
1337 /* Some engineering samples do not have the ID set, rely on
1338 * the device being registered correctly.
1339 */
1340 if (ret == 0) {
1341 dev_info(wm831x->dev, "Device is an engineering sample\n");
1342 ret = id;
1343 }
1344
1345 switch (ret) {
1346 case WM8310:
1347 parent = WM8310;
1348 wm831x->num_gpio = 16;
1349 wm831x->charger_irq_wake = 1;
1350 if (rev > 0) {
1351 wm831x->has_gpio_ena = 1;
1352 wm831x->has_cs_sts = 1;
1353 }
1354
1355 dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
1356 break;
1357
1358 case WM8311:
1359 parent = WM8311;
1360 wm831x->num_gpio = 16;
1361 wm831x->charger_irq_wake = 1;
1362 if (rev > 0) {
1363 wm831x->has_gpio_ena = 1;
1364 wm831x->has_cs_sts = 1;
1365 }
1366
1367 dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
1368 break;
1369
1370 case WM8312:
1371 parent = WM8312;
1372 wm831x->num_gpio = 16;
1373 wm831x->charger_irq_wake = 1;
1374 if (rev > 0) {
1375 wm831x->has_gpio_ena = 1;
1376 wm831x->has_cs_sts = 1;
1377 }
1378
1379 dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
1380 break;
1381
1382 case WM8320:
1383 parent = WM8320;
1384 wm831x->num_gpio = 12;
1385 dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);
1386 break;
1387
1388 case WM8321:
1389 parent = WM8321;
1390 wm831x->num_gpio = 12;
1391 dev_info(wm831x->dev, "WM8321 revision %c\n", 'A' + rev);
1392 break;
1393
1394 case WM8325:
1395 parent = WM8325;
1396 wm831x->num_gpio = 12;
1397 dev_info(wm831x->dev, "WM8325 revision %c\n", 'A' + rev);
1398 break;
1399
1400 case WM8326:
1401 parent = WM8326;
1402 wm831x->num_gpio = 12;
1403 dev_info(wm831x->dev, "WM8326 revision %c\n", 'A' + rev);
1404 break;
1405
1406 default:
1407 dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1408 ret = -EINVAL;
1409 goto err;
1410 }
1411
1412 /* This will need revisiting in future but is OK for all
1413 * current parts.
1414 */
1415 if (parent != id)
1416 dev_warn(wm831x->dev, "Device was registered as a WM%lx\n",
1417 id);
1418
1419 /* Bootstrap the user key */
1420 ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1421 if (ret < 0) {
1422 dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1423 goto err;
1424 }
1425 if (ret != 0) {
1426 dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1427 ret);
1428 wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1429 }
1430 wm831x->locked = 1;
1431
1432 if (pdata && pdata->pre_init) {
1433 ret = pdata->pre_init(wm831x);
1434 if (ret != 0) {
1435 dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1436 goto err;
1437 }
1438 }
1439
1440 if (pdata) {
1441 for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
1442 if (!pdata->gpio_defaults[i])
1443 continue;
1444
1445 wm831x_reg_write(wm831x,
1446 WM831X_GPIO1_CONTROL + i,
1447 pdata->gpio_defaults[i] & 0xffff);
1448 }
1449 }
1450
1451 /* Multiply by 10 as we have many subdevices of the same type */
1452 if (pdata && pdata->wm831x_num)
1453 wm831x_num = pdata->wm831x_num * 10;
1454 else
1455 wm831x_num = -1;
1456
1457 ret = wm831x_irq_init(wm831x, irq);
1458 if (ret != 0)
1459 goto err;
1460
1461 wm831x_auxadc_init(wm831x);
1462
1463 /* The core device is up, instantiate the subdevices. */
1464 switch (parent) {
1465 case WM8310:
1466 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1467 wm8310_devs, ARRAY_SIZE(wm8310_devs),
1468 NULL, wm831x->irq_base);
1469 break;
1470
1471 case WM8311:
1472 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1473 wm8311_devs, ARRAY_SIZE(wm8311_devs),
1474 NULL, wm831x->irq_base);
1475 if (!pdata || !pdata->disable_touch)
1476 mfd_add_devices(wm831x->dev, wm831x_num,
1477 touch_devs, ARRAY_SIZE(touch_devs),
1478 NULL, wm831x->irq_base);
1479 break;
1480
1481 case WM8312:
1482 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1483 wm8312_devs, ARRAY_SIZE(wm8312_devs),
1484 NULL, wm831x->irq_base);
1485 if (!pdata || !pdata->disable_touch)
1486 mfd_add_devices(wm831x->dev, wm831x_num,
1487 touch_devs, ARRAY_SIZE(touch_devs),
1488 NULL, wm831x->irq_base);
1489 break;
1490
1491 case WM8320:
1492 case WM8321:
1493 case WM8325:
1494 case WM8326:
1495 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1496 wm8320_devs, ARRAY_SIZE(wm8320_devs),
1497 NULL, wm831x->irq_base);
1498 break;
1499
1500 default:
1501 /* If this happens the bus probe function is buggy */
1502 BUG();
1503 }
1504
1505 if (ret != 0) {
1506 dev_err(wm831x->dev, "Failed to add children\n");
1507 goto err_irq;
1508 }
1509
1510 /* The RTC can only be used if the 32.768kHz crystal is
1511 * enabled; this can't be controlled by software at runtime.
1512 */
1513 ret = wm831x_reg_read(wm831x, WM831X_CLOCK_CONTROL_2);
1514 if (ret < 0) {
1515 dev_err(wm831x->dev, "Failed to read clock status: %d\n", ret);
1516 goto err_irq;
1517 }
1518
1519 if (ret & WM831X_XTAL_ENA) {
1520 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1521 rtc_devs, ARRAY_SIZE(rtc_devs),
1522 NULL, wm831x->irq_base);
1523 if (ret != 0) {
1524 dev_err(wm831x->dev, "Failed to add RTC: %d\n", ret);
1525 goto err_irq;
1526 }
1527 } else {
1528 dev_info(wm831x->dev, "32.768kHz clock disabled, no RTC\n");
1529 }
1530
1531 if (pdata && pdata->backlight) {
1532 /* Treat errors as non-critical */
1533 ret = mfd_add_devices(wm831x->dev, wm831x_num, backlight_devs,
1534 ARRAY_SIZE(backlight_devs), NULL,
1535 wm831x->irq_base);
1536 if (ret < 0)
1537 dev_err(wm831x->dev, "Failed to add backlight: %d\n",
1538 ret);
1539 }
1540
1541 wm831x_otp_init(wm831x);
1542
1543 if (pdata && pdata->post_init) {
1544 ret = pdata->post_init(wm831x);
1545 if (ret != 0) {
1546 dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1547 goto err_irq;
1548 }
1549 }
1550
1551 return 0;
1552
1553 err_irq:
1554 wm831x_irq_exit(wm831x);
1555 err:
1556 mfd_remove_devices(wm831x->dev);
1557 kfree(wm831x);
1558 return ret;
1559 }
1560
1561 void wm831x_device_exit(struct wm831x *wm831x)
1562 {
1563 wm831x_otp_exit(wm831x);
1564 mfd_remove_devices(wm831x->dev);
1565 if (wm831x->irq_base)
1566 free_irq(wm831x->irq_base + WM831X_IRQ_AUXADC_DATA, wm831x);
1567 wm831x_irq_exit(wm831x);
1568 kfree(wm831x);
1569 }
1570
1571 int wm831x_device_suspend(struct wm831x *wm831x)
1572 {
1573 int reg, mask;
1574
1575 /* If the charger IRQs are a wake source then make sure we ack
1576 * them even if they're not actively being used (eg, no power
1577 * driver or no IRQ line wired up) then acknowledge the
1578 * interrupts otherwise suspend won't last very long.
1579 */
1580 if (wm831x->charger_irq_wake) {
1581 reg = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_2_MASK);
1582
1583 mask = WM831X_CHG_BATT_HOT_EINT |
1584 WM831X_CHG_BATT_COLD_EINT |
1585 WM831X_CHG_BATT_FAIL_EINT |
1586 WM831X_CHG_OV_EINT | WM831X_CHG_END_EINT |
1587 WM831X_CHG_TO_EINT | WM831X_CHG_MODE_EINT |
1588 WM831X_CHG_START_EINT;
1589
1590 /* If any of the interrupts are masked read the statuses */
1591 if (reg & mask)
1592 reg = wm831x_reg_read(wm831x,
1593 WM831X_INTERRUPT_STATUS_2);
1594
1595 if (reg & mask) {
1596 dev_info(wm831x->dev,
1597 "Acknowledging masked charger IRQs: %x\n",
1598 reg & mask);
1599 wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_2,
1600 reg & mask);
1601 }
1602 }
1603
1604 return 0;
1605 }
1606
1607 MODULE_DESCRIPTION("Core support for the WM831X AudioPlus PMIC");
1608 MODULE_LICENSE("GPL");
1609 MODULE_AUTHOR("Mark Brown");