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mfd: Initial core support for WM831x series devices
[mirror_ubuntu-zesty-kernel.git] / drivers / mfd / wm831x-core.c
CommitLineData
d2bedfe7
MB		 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/i2c.h>
18#include <linux/mfd/core.h>
19
20#include <linux/mfd/wm831x/core.h>
21#include <linux/mfd/wm831x/pdata.h>
22
23enum wm831x_parent {
24 WM8310 = 0,
25 WM8311 = 1,
26 WM8312 = 2,
27};
28
29static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg)
30{
31 if (!wm831x->locked)
32 return 0;
33
34 switch (reg) {
35 case WM831X_WATCHDOG:
36 case WM831X_DC4_CONTROL:
37 case WM831X_ON_PIN_CONTROL:
38 case WM831X_BACKUP_CHARGER_CONTROL:
39 case WM831X_CHARGER_CONTROL_1:
40 case WM831X_CHARGER_CONTROL_2:
41 return 1;
42
43 default:
44 return 0;
45 }
46}
47
48/**
49 * wm831x_reg_unlock: Unlock user keyed registers
50 *
51 * The WM831x has a user key preventing writes to particularly
52 * critical registers. This function locks those registers,
53 * allowing writes to them.
54 */
55void wm831x_reg_lock(struct wm831x *wm831x)
56{
57 int ret;
58
59 ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
60 if (ret == 0) {
61 dev_vdbg(wm831x->dev, "Registers locked\n");
62
63 mutex_lock(&wm831x->io_lock);
64 WARN_ON(wm831x->locked);
65 wm831x->locked = 1;
66 mutex_unlock(&wm831x->io_lock);
67 } else {
68 dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret);
69 }
70
71}
72EXPORT_SYMBOL_GPL(wm831x_reg_lock);
73
74/**
75 * wm831x_reg_unlock: Unlock user keyed registers
76 *
77 * The WM831x has a user key preventing writes to particularly
78 * critical registers. This function locks those registers,
79 * preventing spurious writes.
80 */
81int wm831x_reg_unlock(struct wm831x *wm831x)
82{
83 int ret;
84
85 /* 0x9716 is the value required to unlock the registers */
86 ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716);
87 if (ret == 0) {
88 dev_vdbg(wm831x->dev, "Registers unlocked\n");
89
90 mutex_lock(&wm831x->io_lock);
91 WARN_ON(!wm831x->locked);
92 wm831x->locked = 0;
93 mutex_unlock(&wm831x->io_lock);
94 }
95
96 return ret;
97}
98EXPORT_SYMBOL_GPL(wm831x_reg_unlock);
99
100static int wm831x_read(struct wm831x *wm831x, unsigned short reg,
101 int bytes, void *dest)
102{
103 int ret, i;
104 u16 *buf = dest;
105
106 BUG_ON(bytes % 2);
107 BUG_ON(bytes <= 0);
108
109 ret = wm831x->read_dev(wm831x, reg, bytes, dest);
110 if (ret < 0)
111 return ret;
112
113 for (i = 0; i < bytes / 2; i++) {
114 buf[i] = be16_to_cpu(buf[i]);
115
116 dev_vdbg(wm831x->dev, "Read %04x from R%d(0x%x)\n",
117 buf[i], reg + i, reg + i);
118 }
119
120 return 0;
121}
122
123/**
124 * wm831x_reg_read: Read a single WM831x register.
125 *
126 * @wm831x: Device to read from.
127 * @reg: Register to read.
128 */
129int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
130{
131 unsigned short val;
132 int ret;
133
134 mutex_lock(&wm831x->io_lock);
135
136 ret = wm831x_read(wm831x, reg, 2, &val);
137
138 mutex_unlock(&wm831x->io_lock);
139
140 if (ret < 0)
141 return ret;
142 else
143 return val;
144}
145EXPORT_SYMBOL_GPL(wm831x_reg_read);
146
147/**
148 * wm831x_bulk_read: Read multiple WM831x registers
149 *
150 * @wm831x: Device to read from
151 * @reg: First register
152 * @count: Number of registers
153 * @buf: Buffer to fill.
154 */
155int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
156 int count, u16 *buf)
157{
158 int ret;
159
160 mutex_lock(&wm831x->io_lock);
161
162 ret = wm831x_read(wm831x, reg, count * 2, buf);
163
164 mutex_unlock(&wm831x->io_lock);
165
166 return ret;
167}
168EXPORT_SYMBOL_GPL(wm831x_bulk_read);
169
170static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
171 int bytes, void *src)
172{
173 u16 *buf = src;
174 int i;
175
176 BUG_ON(bytes % 2);
177 BUG_ON(bytes <= 0);
178
179 for (i = 0; i < bytes / 2; i++) {
180 if (wm831x_reg_locked(wm831x, reg))
181 return -EPERM;
182
183 dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
184 buf[i], reg + i, reg + i);
185
186 buf[i] = cpu_to_be16(buf[i]);
187 }
188
189 return wm831x->write_dev(wm831x, reg, bytes, src);
190}
191
192/**
193 * wm831x_reg_write: Write a single WM831x register.
194 *
195 * @wm831x: Device to write to.
196 * @reg: Register to write to.
197 * @val: Value to write.
198 */
199int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg,
200 unsigned short val)
201{
202 int ret;
203
204 mutex_lock(&wm831x->io_lock);
205
206 ret = wm831x_write(wm831x, reg, 2, &val);
207
208 mutex_unlock(&wm831x->io_lock);
209
210 return ret;
211}
212EXPORT_SYMBOL_GPL(wm831x_reg_write);
213
214/**
215 * wm831x_set_bits: Set the value of a bitfield in a WM831x register
216 *
217 * @wm831x: Device to write to.
218 * @reg: Register to write to.
219 * @mask: Mask of bits to set.
220 * @val: Value to set (unshifted)
221 */
222int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
223 unsigned short mask, unsigned short val)
224{
225 int ret;
226 u16 r;
227
228 mutex_lock(&wm831x->io_lock);
229
230 ret = wm831x_read(wm831x, reg, 2, &r);
231 if (ret < 0)
232 goto out;
233
234 r &= ~mask;
235 r |= val;
236
237 ret = wm831x_write(wm831x, reg, 2, &r);
238
239out:
240 mutex_unlock(&wm831x->io_lock);
241
242 return ret;
243}
244EXPORT_SYMBOL_GPL(wm831x_set_bits);
245
246static struct resource wm831x_dcdc1_resources[] = {
247 {
248 .start = WM831X_DC1_CONTROL_1,
249 .end = WM831X_DC1_DVS_CONTROL,
250 .flags = IORESOURCE_IO,
251 },
252 {
253 .name = "UV",
254 .start = WM831X_IRQ_UV_DC1,
255 .end = WM831X_IRQ_UV_DC1,
256 .flags = IORESOURCE_IRQ,
257 },
258 {
259 .name = "HC",
260 .start = WM831X_IRQ_HC_DC1,
261 .end = WM831X_IRQ_HC_DC1,
262 .flags = IORESOURCE_IRQ,
263 },
264};
265
266
267static struct resource wm831x_dcdc2_resources[] = {
268 {
269 .start = WM831X_DC2_CONTROL_1,
270 .end = WM831X_DC2_DVS_CONTROL,
271 .flags = IORESOURCE_IO,
272 },
273 {
274 .name = "UV",
275 .start = WM831X_IRQ_UV_DC2,
276 .end = WM831X_IRQ_UV_DC2,
277 .flags = IORESOURCE_IRQ,
278 },
279 {
280 .name = "HC",
281 .start = WM831X_IRQ_HC_DC2,
282 .end = WM831X_IRQ_HC_DC2,
283 .flags = IORESOURCE_IRQ,
284 },
285};
286
287static struct resource wm831x_dcdc3_resources[] = {
288 {
289 .start = WM831X_DC3_CONTROL_1,
290 .end = WM831X_DC3_SLEEP_CONTROL,
291 .flags = IORESOURCE_IO,
292 },
293 {
294 .name = "UV",
295 .start = WM831X_IRQ_UV_DC3,
296 .end = WM831X_IRQ_UV_DC3,
297 .flags = IORESOURCE_IRQ,
298 },
299};
300
301static struct resource wm831x_dcdc4_resources[] = {
302 {
303 .start = WM831X_DC4_CONTROL,
304 .end = WM831X_DC4_SLEEP_CONTROL,
305 .flags = IORESOURCE_IO,
306 },
307 {
308 .name = "UV",
309 .start = WM831X_IRQ_UV_DC4,
310 .end = WM831X_IRQ_UV_DC4,
311 .flags = IORESOURCE_IRQ,
312 },
313};
314
315static struct resource wm831x_gpio_resources[] = {
316 {
317 .start = WM831X_IRQ_GPIO_1,
318 .end = WM831X_IRQ_GPIO_16,
319 .flags = IORESOURCE_IRQ,
320 },
321};
322
323static struct resource wm831x_isink1_resources[] = {
324 {
325 .start = WM831X_CURRENT_SINK_1,
326 .end = WM831X_CURRENT_SINK_1,
327 .flags = IORESOURCE_IO,
328 },
329 {
330 .start = WM831X_IRQ_CS1,
331 .end = WM831X_IRQ_CS1,
332 .flags = IORESOURCE_IRQ,
333 },
334};
335
336static struct resource wm831x_isink2_resources[] = {
337 {
338 .start = WM831X_CURRENT_SINK_2,
339 .end = WM831X_CURRENT_SINK_2,
340 .flags = IORESOURCE_IO,
341 },
342 {
343 .start = WM831X_IRQ_CS2,
344 .end = WM831X_IRQ_CS2,
345 .flags = IORESOURCE_IRQ,
346 },
347};
348
349static struct resource wm831x_ldo1_resources[] = {
350 {
351 .start = WM831X_LDO1_CONTROL,
352 .end = WM831X_LDO1_SLEEP_CONTROL,
353 .flags = IORESOURCE_IO,
354 },
355 {
356 .name = "UV",
357 .start = WM831X_IRQ_UV_LDO1,
358 .end = WM831X_IRQ_UV_LDO1,
359 .flags = IORESOURCE_IRQ,
360 },
361};
362
363static struct resource wm831x_ldo2_resources[] = {
364 {
365 .start = WM831X_LDO2_CONTROL,
366 .end = WM831X_LDO2_SLEEP_CONTROL,
367 .flags = IORESOURCE_IO,
368 },
369 {
370 .name = "UV",
371 .start = WM831X_IRQ_UV_LDO2,
372 .end = WM831X_IRQ_UV_LDO2,
373 .flags = IORESOURCE_IRQ,
374 },
375};
376
377static struct resource wm831x_ldo3_resources[] = {
378 {
379 .start = WM831X_LDO3_CONTROL,
380 .end = WM831X_LDO3_SLEEP_CONTROL,
381 .flags = IORESOURCE_IO,
382 },
383 {
384 .name = "UV",
385 .start = WM831X_IRQ_UV_LDO3,
386 .end = WM831X_IRQ_UV_LDO3,
387 .flags = IORESOURCE_IRQ,
388 },
389};
390
391static struct resource wm831x_ldo4_resources[] = {
392 {
393 .start = WM831X_LDO4_CONTROL,
394 .end = WM831X_LDO4_SLEEP_CONTROL,
395 .flags = IORESOURCE_IO,
396 },
397 {
398 .name = "UV",
399 .start = WM831X_IRQ_UV_LDO4,
400 .end = WM831X_IRQ_UV_LDO4,
401 .flags = IORESOURCE_IRQ,
402 },
403};
404
405static struct resource wm831x_ldo5_resources[] = {
406 {
407 .start = WM831X_LDO5_CONTROL,
408 .end = WM831X_LDO5_SLEEP_CONTROL,
409 .flags = IORESOURCE_IO,
410 },
411 {
412 .name = "UV",
413 .start = WM831X_IRQ_UV_LDO5,
414 .end = WM831X_IRQ_UV_LDO5,
415 .flags = IORESOURCE_IRQ,
416 },
417};
418
419static struct resource wm831x_ldo6_resources[] = {
420 {
421 .start = WM831X_LDO6_CONTROL,
422 .end = WM831X_LDO6_SLEEP_CONTROL,
423 .flags = IORESOURCE_IO,
424 },
425 {
426 .name = "UV",
427 .start = WM831X_IRQ_UV_LDO6,
428 .end = WM831X_IRQ_UV_LDO6,
429 .flags = IORESOURCE_IRQ,
430 },
431};
432
433static struct resource wm831x_ldo7_resources[] = {
434 {
435 .start = WM831X_LDO7_CONTROL,
436 .end = WM831X_LDO7_SLEEP_CONTROL,
437 .flags = IORESOURCE_IO,
438 },
439 {
440 .name = "UV",
441 .start = WM831X_IRQ_UV_LDO7,
442 .end = WM831X_IRQ_UV_LDO7,
443 .flags = IORESOURCE_IRQ,
444 },
445};
446
447static struct resource wm831x_ldo8_resources[] = {
448 {
449 .start = WM831X_LDO8_CONTROL,
450 .end = WM831X_LDO8_SLEEP_CONTROL,
451 .flags = IORESOURCE_IO,
452 },
453 {
454 .name = "UV",
455 .start = WM831X_IRQ_UV_LDO8,
456 .end = WM831X_IRQ_UV_LDO8,
457 .flags = IORESOURCE_IRQ,
458 },
459};
460
461static struct resource wm831x_ldo9_resources[] = {
462 {
463 .start = WM831X_LDO9_CONTROL,
464 .end = WM831X_LDO9_SLEEP_CONTROL,
465 .flags = IORESOURCE_IO,
466 },
467 {
468 .name = "UV",
469 .start = WM831X_IRQ_UV_LDO9,
470 .end = WM831X_IRQ_UV_LDO9,
471 .flags = IORESOURCE_IRQ,
472 },
473};
474
475static struct resource wm831x_ldo10_resources[] = {
476 {
477 .start = WM831X_LDO10_CONTROL,
478 .end = WM831X_LDO10_SLEEP_CONTROL,
479 .flags = IORESOURCE_IO,
480 },
481 {
482 .name = "UV",
483 .start = WM831X_IRQ_UV_LDO10,
484 .end = WM831X_IRQ_UV_LDO10,
485 .flags = IORESOURCE_IRQ,
486 },
487};
488
489static struct resource wm831x_ldo11_resources[] = {
490 {
491 .start = WM831X_LDO11_ON_CONTROL,
492 .end = WM831X_LDO11_SLEEP_CONTROL,
493 .flags = IORESOURCE_IO,
494 },
495};
496
497static struct resource wm831x_on_resources[] = {
498 {
499 .start = WM831X_IRQ_ON,
500 .end = WM831X_IRQ_ON,
501 .flags = IORESOURCE_IRQ,
502 },
503};
504
505
506static struct resource wm831x_power_resources[] = {
507 {
508 .name = "SYSLO",
509 .start = WM831X_IRQ_PPM_SYSLO,
510 .end = WM831X_IRQ_PPM_SYSLO,
511 .flags = IORESOURCE_IRQ,
512 },
513 {
514 .name = "PWR SRC",
515 .start = WM831X_IRQ_PPM_PWR_SRC,
516 .end = WM831X_IRQ_PPM_PWR_SRC,
517 .flags = IORESOURCE_IRQ,
518 },
519 {
520 .name = "USB CURR",
521 .start = WM831X_IRQ_PPM_USB_CURR,
522 .end = WM831X_IRQ_PPM_USB_CURR,
523 .flags = IORESOURCE_IRQ,
524 },
525 {
526 .name = "BATT HOT",
527 .start = WM831X_IRQ_CHG_BATT_HOT,
528 .end = WM831X_IRQ_CHG_BATT_HOT,
529 .flags = IORESOURCE_IRQ,
530 },
531 {
532 .name = "BATT COLD",
533 .start = WM831X_IRQ_CHG_BATT_COLD,
534 .end = WM831X_IRQ_CHG_BATT_COLD,
535 .flags = IORESOURCE_IRQ,
536 },
537 {
538 .name = "BATT FAIL",
539 .start = WM831X_IRQ_CHG_BATT_FAIL,
540 .end = WM831X_IRQ_CHG_BATT_FAIL,
541 .flags = IORESOURCE_IRQ,
542 },
543 {
544 .name = "OV",
545 .start = WM831X_IRQ_CHG_OV,
546 .end = WM831X_IRQ_CHG_OV,
547 .flags = IORESOURCE_IRQ,
548 },
549 {
550 .name = "END",
551 .start = WM831X_IRQ_CHG_END,
552 .end = WM831X_IRQ_CHG_END,
553 .flags = IORESOURCE_IRQ,
554 },
555 {
556 .name = "TO",
557 .start = WM831X_IRQ_CHG_TO,
558 .end = WM831X_IRQ_CHG_TO,
559 .flags = IORESOURCE_IRQ,
560 },
561 {
562 .name = "MODE",
563 .start = WM831X_IRQ_CHG_MODE,
564 .end = WM831X_IRQ_CHG_MODE,
565 .flags = IORESOURCE_IRQ,
566 },
567 {
568 .name = "START",
569 .start = WM831X_IRQ_CHG_START,
570 .end = WM831X_IRQ_CHG_START,
571 .flags = IORESOURCE_IRQ,
572 },
573};
574
575static struct resource wm831x_rtc_resources[] = {
576 {
577 .name = "PER",
578 .start = WM831X_IRQ_RTC_PER,
579 .end = WM831X_IRQ_RTC_PER,
580 .flags = IORESOURCE_IRQ,
581 },
582 {
583 .name = "ALM",
584 .start = WM831X_IRQ_RTC_ALM,
585 .end = WM831X_IRQ_RTC_ALM,
586 .flags = IORESOURCE_IRQ,
587 },
588};
589
590static struct resource wm831x_status1_resources[] = {
591 {
592 .start = WM831X_STATUS_LED_1,
593 .end = WM831X_STATUS_LED_1,
594 .flags = IORESOURCE_IO,
595 },
596};
597
598static struct resource wm831x_status2_resources[] = {
599 {
600 .start = WM831X_STATUS_LED_2,
601 .end = WM831X_STATUS_LED_2,
602 .flags = IORESOURCE_IO,
603 },
604};
605
606static struct resource wm831x_touch_resources[] = {
607 {
608 .name = "TCHPD",
609 .start = WM831X_IRQ_TCHPD,
610 .end = WM831X_IRQ_TCHPD,
611 .flags = IORESOURCE_IRQ,
612 },
613 {
614 .name = "TCHDATA",
615 .start = WM831X_IRQ_TCHDATA,
616 .end = WM831X_IRQ_TCHDATA,
617 .flags = IORESOURCE_IRQ,
618 },
619};
620
621static struct resource wm831x_wdt_resources[] = {
622 {
623 .start = WM831X_IRQ_WDOG_TO,
624 .end = WM831X_IRQ_WDOG_TO,
625 .flags = IORESOURCE_IRQ,
626 },
627};
628
629static struct mfd_cell wm8310_devs[] = {
630 {
631 .name = "wm831x-buckv",
632 .id = 1,
633 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
634 .resources = wm831x_dcdc1_resources,
635 },
636 {
637 .name = "wm831x-buckv",
638 .id = 2,
639 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
640 .resources = wm831x_dcdc2_resources,
641 },
642 {
643 .name = "wm831x-buckp",
644 .id = 3,
645 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
646 .resources = wm831x_dcdc3_resources,
647 },
648 {
649 .name = "wm831x-boostp",
650 .id = 4,
651 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
652 .resources = wm831x_dcdc4_resources,
653 },
654 {
655 .name = "wm831x-epe",
656 .id = 1,
657 },
658 {
659 .name = "wm831x-epe",
660 .id = 2,
661 },
662 {
663 .name = "wm831x-gpio",
664 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
665 .resources = wm831x_gpio_resources,
666 },
667 {
668 .name = "wm831x-hwmon",
669 },
670 {
671 .name = "wm831x-isink",
672 .id = 1,
673 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
674 .resources = wm831x_isink1_resources,
675 },
676 {
677 .name = "wm831x-isink",
678 .id = 2,
679 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
680 .resources = wm831x_isink2_resources,
681 },
682 {
683 .name = "wm831x-ldo",
684 .id = 1,
685 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
686 .resources = wm831x_ldo1_resources,
687 },
688 {
689 .name = "wm831x-ldo",
690 .id = 2,
691 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
692 .resources = wm831x_ldo2_resources,
693 },
694 {
695 .name = "wm831x-ldo",
696 .id = 3,
697 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
698 .resources = wm831x_ldo3_resources,
699 },
700 {
701 .name = "wm831x-ldo",
702 .id = 4,
703 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
704 .resources = wm831x_ldo4_resources,
705 },
706 {
707 .name = "wm831x-ldo",
708 .id = 5,
709 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
710 .resources = wm831x_ldo5_resources,
711 },
712 {
713 .name = "wm831x-ldo",
714 .id = 6,
715 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
716 .resources = wm831x_ldo6_resources,
717 },
718 {
719 .name = "wm831x-aldo",
720 .id = 7,
721 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
722 .resources = wm831x_ldo7_resources,
723 },
724 {
725 .name = "wm831x-aldo",
726 .id = 8,
727 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
728 .resources = wm831x_ldo8_resources,
729 },
730 {
731 .name = "wm831x-aldo",
732 .id = 9,
733 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
734 .resources = wm831x_ldo9_resources,
735 },
736 {
737 .name = "wm831x-aldo",
738 .id = 10,
739 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
740 .resources = wm831x_ldo10_resources,
741 },
742 {
743 .name = "wm831x-alive-ldo",
744 .id = 11,
745 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
746 .resources = wm831x_ldo11_resources,
747 },
748 {
749 .name = "wm831x-on",
750 .num_resources = ARRAY_SIZE(wm831x_on_resources),
751 .resources = wm831x_on_resources,
752 },
753 {
754 .name = "wm831x-power",
755 .num_resources = ARRAY_SIZE(wm831x_power_resources),
756 .resources = wm831x_power_resources,
757 },
758 {
759 .name = "wm831x-rtc",
760 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
761 .resources = wm831x_rtc_resources,
762 },
763 {
764 .name = "wm831x-status",
765 .id = 1,
766 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
767 .resources = wm831x_status1_resources,
768 },
769 {
770 .name = "wm831x-status",
771 .id = 2,
772 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
773 .resources = wm831x_status2_resources,
774 },
775 {
776 .name = "wm831x-watchdog",
777 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
778 .resources = wm831x_wdt_resources,
779 },
780};
781
782static struct mfd_cell wm8311_devs[] = {
783 {
784 .name = "wm831x-buckv",
785 .id = 1,
786 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
787 .resources = wm831x_dcdc1_resources,
788 },
789 {
790 .name = "wm831x-buckv",
791 .id = 2,
792 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
793 .resources = wm831x_dcdc2_resources,
794 },
795 {
796 .name = "wm831x-buckp",
797 .id = 3,
798 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
799 .resources = wm831x_dcdc3_resources,
800 },
801 {
802 .name = "wm831x-boostp",
803 .id = 4,
804 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
805 .resources = wm831x_dcdc4_resources,
806 },
807 {
808 .name = "wm831x-epe",
809 .id = 1,
810 },
811 {
812 .name = "wm831x-epe",
813 .id = 2,
814 },
815 {
816 .name = "wm831x-gpio",
817 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
818 .resources = wm831x_gpio_resources,
819 },
820 {
821 .name = "wm831x-hwmon",
822 },
823 {
824 .name = "wm831x-isink",
825 .id = 1,
826 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
827 .resources = wm831x_isink1_resources,
828 },
829 {
830 .name = "wm831x-isink",
831 .id = 2,
832 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
833 .resources = wm831x_isink2_resources,
834 },
835 {
836 .name = "wm831x-ldo",
837 .id = 1,
838 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
839 .resources = wm831x_ldo1_resources,
840 },
841 {
842 .name = "wm831x-ldo",
843 .id = 2,
844 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
845 .resources = wm831x_ldo2_resources,
846 },
847 {
848 .name = "wm831x-ldo",
849 .id = 3,
850 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
851 .resources = wm831x_ldo3_resources,
852 },
853 {
854 .name = "wm831x-ldo",
855 .id = 4,
856 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
857 .resources = wm831x_ldo4_resources,
858 },
859 {
860 .name = "wm831x-ldo",
861 .id = 5,
862 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
863 .resources = wm831x_ldo5_resources,
864 },
865 {
866 .name = "wm831x-aldo",
867 .id = 7,
868 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
869 .resources = wm831x_ldo7_resources,
870 },
871 {
872 .name = "wm831x-alive-ldo",
873 .id = 11,
874 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
875 .resources = wm831x_ldo11_resources,
876 },
877 {
878 .name = "wm831x-on",
879 .num_resources = ARRAY_SIZE(wm831x_on_resources),
880 .resources = wm831x_on_resources,
881 },
882 {
883 .name = "wm831x-power",
884 .num_resources = ARRAY_SIZE(wm831x_power_resources),
885 .resources = wm831x_power_resources,
886 },
887 {
888 .name = "wm831x-rtc",
889 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
890 .resources = wm831x_rtc_resources,
891 },
892 {
893 .name = "wm831x-status",
894 .id = 1,
895 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
896 .resources = wm831x_status1_resources,
897 },
898 {
899 .name = "wm831x-status",
900 .id = 2,
901 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
902 .resources = wm831x_status2_resources,
903 },
904 {
905 .name = "wm831x-touch",
906 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
907 .resources = wm831x_touch_resources,
908 },
909 {
910 .name = "wm831x-watchdog",
911 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
912 .resources = wm831x_wdt_resources,
913 },
914};
915
916static struct mfd_cell wm8312_devs[] = {
917 {
918 .name = "wm831x-buckv",
919 .id = 1,
920 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
921 .resources = wm831x_dcdc1_resources,
922 },
923 {
924 .name = "wm831x-buckv",
925 .id = 2,
926 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
927 .resources = wm831x_dcdc2_resources,
928 },
929 {
930 .name = "wm831x-buckp",
931 .id = 3,
932 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
933 .resources = wm831x_dcdc3_resources,
934 },
935 {
936 .name = "wm831x-boostp",
937 .id = 4,
938 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
939 .resources = wm831x_dcdc4_resources,
940 },
941 {
942 .name = "wm831x-epe",
943 .id = 1,
944 },
945 {
946 .name = "wm831x-epe",
947 .id = 2,
948 },
949 {
950 .name = "wm831x-gpio",
951 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
952 .resources = wm831x_gpio_resources,
953 },
954 {
955 .name = "wm831x-hwmon",
956 },
957 {
958 .name = "wm831x-isink",
959 .id = 1,
960 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
961 .resources = wm831x_isink1_resources,
962 },
963 {
964 .name = "wm831x-isink",
965 .id = 2,
966 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
967 .resources = wm831x_isink2_resources,
968 },
969 {
970 .name = "wm831x-ldo",
971 .id = 1,
972 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
973 .resources = wm831x_ldo1_resources,
974 },
975 {
976 .name = "wm831x-ldo",
977 .id = 2,
978 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
979 .resources = wm831x_ldo2_resources,
980 },
981 {
982 .name = "wm831x-ldo",
983 .id = 3,
984 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
985 .resources = wm831x_ldo3_resources,
986 },
987 {
988 .name = "wm831x-ldo",
989 .id = 4,
990 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
991 .resources = wm831x_ldo4_resources,
992 },
993 {
994 .name = "wm831x-ldo",
995 .id = 5,
996 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
997 .resources = wm831x_ldo5_resources,
998 },
999 {
1000 .name = "wm831x-ldo",
1001 .id = 6,
1002 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1003 .resources = wm831x_ldo6_resources,
1004 },
1005 {
1006 .name = "wm831x-aldo",
1007 .id = 7,
1008 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1009 .resources = wm831x_ldo7_resources,
1010 },
1011 {
1012 .name = "wm831x-aldo",
1013 .id = 8,
1014 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1015 .resources = wm831x_ldo8_resources,
1016 },
1017 {
1018 .name = "wm831x-aldo",
1019 .id = 9,
1020 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1021 .resources = wm831x_ldo9_resources,
1022 },
1023 {
1024 .name = "wm831x-aldo",
1025 .id = 10,
1026 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1027 .resources = wm831x_ldo10_resources,
1028 },
1029 {
1030 .name = "wm831x-alive-ldo",
1031 .id = 11,
1032 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1033 .resources = wm831x_ldo11_resources,
1034 },
1035 {
1036 .name = "wm831x-on",
1037 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1038 .resources = wm831x_on_resources,
1039 },
1040 {
1041 .name = "wm831x-power",
1042 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1043 .resources = wm831x_power_resources,
1044 },
1045 {
1046 .name = "wm831x-rtc",
1047 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1048 .resources = wm831x_rtc_resources,
1049 },
1050 {
1051 .name = "wm831x-status",
1052 .id = 1,
1053 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1054 .resources = wm831x_status1_resources,
1055 },
1056 {
1057 .name = "wm831x-status",
1058 .id = 2,
1059 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1060 .resources = wm831x_status2_resources,
1061 },
1062 {
1063 .name = "wm831x-touch",
1064 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1065 .resources = wm831x_touch_resources,
1066 },
1067 {
1068 .name = "wm831x-watchdog",
1069 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1070 .resources = wm831x_wdt_resources,
1071 },
1072};
1073
1074/*
1075 * Instantiate the generic non-control parts of the device.
1076 */
1077static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
1078{
1079 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
1080 int rev;
1081 enum wm831x_parent parent;
1082 int ret;
1083
1084 mutex_init(&wm831x->io_lock);
1085 mutex_init(&wm831x->key_lock);
1086 dev_set_drvdata(wm831x->dev, wm831x);
1087
1088 ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1089 if (ret < 0) {
1090 dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1091 goto err;
1092 }
1093 if (ret != 0x6204) {
1094 dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1095 ret = -EINVAL;
1096 goto err;
1097 }
1098
1099 ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1100 if (ret < 0) {
1101 dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1102 goto err;
1103 }
1104 rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1105
1106 ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1107 if (ret < 0) {
1108 dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1109 goto err;
1110 }
1111
1112 switch (ret) {
1113 case 0x8310:
1114 parent = WM8310;
1115 switch (rev) {
1116 case 0:
1117 dev_info(wm831x->dev, "WM8310 revision %c\n",
1118 'A' + rev);
1119 break;
1120 }
1121 break;
1122
1123 case 0x8311:
1124 parent = WM8311;
1125 switch (rev) {
1126 case 0:
1127 dev_info(wm831x->dev, "WM8311 revision %c\n",
1128 'A' + rev);
1129 break;
1130 }
1131 break;
1132
1133 case 0x8312:
1134 parent = WM8312;
1135 switch (rev) {
1136 case 0:
1137 dev_info(wm831x->dev, "WM8312 revision %c\n",
1138 'A' + rev);
1139 break;
1140 }
1141 break;
1142
1143 case 0:
1144 /* Some engineering samples do not have the ID set,
1145 * rely on the device being registered correctly.
1146 * This will need revisiting for future devices with
1147 * multiple dies.
1148 */
1149 parent = id;
1150 switch (rev) {
1151 case 0:
1152 dev_info(wm831x->dev, "WM831%d ES revision %c\n",
1153 parent, 'A' + rev);
1154 break;
1155 }
1156 break;
1157
1158 default:
1159 dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1160 ret = -EINVAL;
1161 goto err;
1162 }
1163
1164 /* This will need revisiting in future but is OK for all
1165 * current parts.
1166 */
1167 if (parent != id)
1168 dev_warn(wm831x->dev, "Device was registered as a WM831%lu\n",
1169 id);
1170
1171 /* Bootstrap the user key */
1172 ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1173 if (ret < 0) {
1174 dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1175 goto err;
1176 }
1177 if (ret != 0) {
1178 dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1179 ret);
1180 wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1181 }
1182 wm831x->locked = 1;
1183
1184 if (pdata && pdata->pre_init) {
1185 ret = pdata->pre_init(wm831x);
1186 if (ret != 0) {
1187 dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1188 goto err;
1189 }
1190 }
1191
1192 /* The core device is up, instantiate the subdevices. */
1193 switch (parent) {
1194 case WM8310:
1195 ret = mfd_add_devices(wm831x->dev, -1,
1196 wm8310_devs, ARRAY_SIZE(wm8310_devs),
1197 NULL, 0);
1198 break;
1199
1200 case WM8311:
1201 ret = mfd_add_devices(wm831x->dev, -1,
1202 wm8311_devs, ARRAY_SIZE(wm8311_devs),
1203 NULL, 0);
1204 break;
1205
1206 case WM8312:
1207 ret = mfd_add_devices(wm831x->dev, -1,
1208 wm8312_devs, ARRAY_SIZE(wm8312_devs),
1209 NULL, 0);
1210 break;
1211
1212 default:
1213 /* If this happens the bus probe function is buggy */
1214 BUG();
1215 }
1216
1217 if (ret != 0) {
1218 dev_err(wm831x->dev, "Failed to add children\n");
1219 goto err;
1220 }
1221
1222 if (pdata && pdata->post_init) {
1223 ret = pdata->post_init(wm831x);
1224 if (ret != 0) {
1225 dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1226 goto err;
1227 }
1228 }
1229
1230 return 0;
1231
1232err:
1233 mfd_remove_devices(wm831x->dev);
1234 kfree(wm831x);
1235 return ret;
1236}
1237
1238static void wm831x_device_exit(struct wm831x *wm831x)
1239{
1240 mfd_remove_devices(wm831x->dev);
1241 kfree(wm831x);
1242}
1243
1244static int wm831x_i2c_read_device(struct wm831x *wm831x, unsigned short reg,
1245 int bytes, void *dest)
1246{
1247 struct i2c_client *i2c = wm831x->control_data;
1248 int ret;
1249 u16 r = cpu_to_be16(reg);
1250
1251 ret = i2c_master_send(i2c, (unsigned char *)&r, 2);
1252 if (ret < 0)
1253 return ret;
1254 if (ret != 2)
1255 return -EIO;
1256
1257 ret = i2c_master_recv(i2c, dest, bytes);
1258 if (ret < 0)
1259 return ret;
1260 if (ret != bytes)
1261 return -EIO;
1262 return 0;
1263}
1264
1265/* Currently we allocate the write buffer on the stack; this is OK for
1266 * small writes - if we need to do large writes this will need to be
1267 * revised.
1268 */
1269static int wm831x_i2c_write_device(struct wm831x *wm831x, unsigned short reg,
1270 int bytes, void *src)
1271{
1272 struct i2c_client *i2c = wm831x->control_data;
1273 unsigned char msg[bytes + 2];
1274 int ret;
1275
1276 reg = cpu_to_be16(reg);
1277 memcpy(&msg[0], &reg, 2);
1278 memcpy(&msg[2], src, bytes);
1279
1280 ret = i2c_master_send(i2c, msg, bytes + 2);
1281 if (ret < 0)
1282 return ret;
1283 if (ret < bytes + 2)
1284 return -EIO;
1285
1286 return 0;
1287}
1288
1289static int wm831x_i2c_probe(struct i2c_client *i2c,
1290 const struct i2c_device_id *id)
1291{
1292 struct wm831x *wm831x;
1293
1294 wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
1295 if (wm831x == NULL) {
1296 kfree(i2c);
1297 return -ENOMEM;
1298 }
1299
1300 i2c_set_clientdata(i2c, wm831x);
1301 wm831x->dev = &i2c->dev;
1302 wm831x->control_data = i2c;
1303 wm831x->read_dev = wm831x_i2c_read_device;
1304 wm831x->write_dev = wm831x_i2c_write_device;
1305
1306 return wm831x_device_init(wm831x, id->driver_data, i2c->irq);
1307}
1308
1309static int wm831x_i2c_remove(struct i2c_client *i2c)
1310{
1311 struct wm831x *wm831x = i2c_get_clientdata(i2c);
1312
1313 wm831x_device_exit(wm831x);
1314
1315 return 0;
1316}
1317
1318static const struct i2c_device_id wm831x_i2c_id[] = {
1319 { "wm8310", WM8310 },
1320 { "wm8311", WM8311 },
1321 { "wm8312", WM8312 },
1322 { }
1323};
1324MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
1325
1326
1327static struct i2c_driver wm831x_i2c_driver = {
1328 .driver = {
1329 .name = "wm831x",
1330 .owner = THIS_MODULE,
1331 },
1332 .probe = wm831x_i2c_probe,
1333 .remove = wm831x_i2c_remove,
1334 .id_table = wm831x_i2c_id,
1335};
1336
1337static int __init wm831x_i2c_init(void)
1338{
1339 int ret;
1340
1341 ret = i2c_add_driver(&wm831x_i2c_driver);
1342 if (ret != 0)
1343 pr_err("Failed to register wm831x I2C driver: %d\n", ret);
1344
1345 return ret;
1346}
1347subsys_initcall(wm831x_i2c_init);
1348
1349static void __exit wm831x_i2c_exit(void)
1350{
1351 i2c_del_driver(&wm831x_i2c_driver);
1352}
1353module_exit(wm831x_i2c_exit);
1354
1355MODULE_DESCRIPTION("I2C support for the WM831X AudioPlus PMIC");
1356MODULE_LICENSE("GPL");
1357MODULE_AUTHOR("Mark Brown");
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