2 * wm831x-core.c -- Device access for Wolfson WM831x PMICs
4 * Copyright 2009 Wolfson Microelectronics PLC.
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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.
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/i2c.h>
18 #include <linux/bcd.h>
19 #include <linux/delay.h>
20 #include <linux/mfd/core.h>
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>
29 /* Current settings - values are 2*2^(reg_val/4) microamps. These are
30 * exported since they are used by multiple drivers.
32 int wm831x_isinkv_values[WM831X_ISINK_MAX_ISEL + 1] = {
90 EXPORT_SYMBOL_GPL(wm831x_isinkv_values);
98 static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg)
104 case WM831X_WATCHDOG:
105 case WM831X_DC4_CONTROL:
106 case WM831X_ON_PIN_CONTROL:
107 case WM831X_BACKUP_CHARGER_CONTROL:
108 case WM831X_CHARGER_CONTROL_1:
109 case WM831X_CHARGER_CONTROL_2:
118 * wm831x_reg_unlock: Unlock user keyed registers
120 * The WM831x has a user key preventing writes to particularly
121 * critical registers. This function locks those registers,
122 * allowing writes to them.
124 void wm831x_reg_lock(struct wm831x *wm831x)
128 ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
130 dev_vdbg(wm831x->dev, "Registers locked\n");
132 mutex_lock(&wm831x->io_lock);
133 WARN_ON(wm831x->locked);
135 mutex_unlock(&wm831x->io_lock);
137 dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret);
141 EXPORT_SYMBOL_GPL(wm831x_reg_lock);
144 * wm831x_reg_unlock: Unlock user keyed registers
146 * The WM831x has a user key preventing writes to particularly
147 * critical registers. This function locks those registers,
148 * preventing spurious writes.
150 int wm831x_reg_unlock(struct wm831x *wm831x)
154 /* 0x9716 is the value required to unlock the registers */
155 ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716);
157 dev_vdbg(wm831x->dev, "Registers unlocked\n");
159 mutex_lock(&wm831x->io_lock);
160 WARN_ON(!wm831x->locked);
162 mutex_unlock(&wm831x->io_lock);
167 EXPORT_SYMBOL_GPL(wm831x_reg_unlock);
169 static int wm831x_read(struct wm831x *wm831x, unsigned short reg,
170 int bytes, void *dest)
178 ret = wm831x->read_dev(wm831x, reg, bytes, dest);
182 for (i = 0; i < bytes / 2; i++) {
183 buf[i] = be16_to_cpu(buf[i]);
185 dev_vdbg(wm831x->dev, "Read %04x from R%d(0x%x)\n",
186 buf[i], reg + i, reg + i);
193 * wm831x_reg_read: Read a single WM831x register.
195 * @wm831x: Device to read from.
196 * @reg: Register to read.
198 int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
203 mutex_lock(&wm831x->io_lock);
205 ret = wm831x_read(wm831x, reg, 2, &val);
207 mutex_unlock(&wm831x->io_lock);
214 EXPORT_SYMBOL_GPL(wm831x_reg_read);
217 * wm831x_bulk_read: Read multiple WM831x registers
219 * @wm831x: Device to read from
220 * @reg: First register
221 * @count: Number of registers
222 * @buf: Buffer to fill.
224 int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
229 mutex_lock(&wm831x->io_lock);
231 ret = wm831x_read(wm831x, reg, count * 2, buf);
233 mutex_unlock(&wm831x->io_lock);
237 EXPORT_SYMBOL_GPL(wm831x_bulk_read);
239 static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
240 int bytes, void *src)
248 for (i = 0; i < bytes / 2; i++) {
249 if (wm831x_reg_locked(wm831x, reg))
252 dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
253 buf[i], reg + i, reg + i);
255 buf[i] = cpu_to_be16(buf[i]);
258 return wm831x->write_dev(wm831x, reg, bytes, src);
262 * wm831x_reg_write: Write a single WM831x register.
264 * @wm831x: Device to write to.
265 * @reg: Register to write to.
266 * @val: Value to write.
268 int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg,
273 mutex_lock(&wm831x->io_lock);
275 ret = wm831x_write(wm831x, reg, 2, &val);
277 mutex_unlock(&wm831x->io_lock);
281 EXPORT_SYMBOL_GPL(wm831x_reg_write);
284 * wm831x_set_bits: Set the value of a bitfield in a WM831x register
286 * @wm831x: Device to write to.
287 * @reg: Register to write to.
288 * @mask: Mask of bits to set.
289 * @val: Value to set (unshifted)
291 int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
292 unsigned short mask, unsigned short val)
297 mutex_lock(&wm831x->io_lock);
299 ret = wm831x_read(wm831x, reg, 2, &r);
306 ret = wm831x_write(wm831x, reg, 2, &r);
309 mutex_unlock(&wm831x->io_lock);
313 EXPORT_SYMBOL_GPL(wm831x_set_bits);
316 * wm831x_auxadc_read: Read a value from the WM831x AUXADC
318 * @wm831x: Device to read from.
319 * @input: AUXADC input to read.
321 int wm831x_auxadc_read(struct wm831x *wm831x, enum wm831x_auxadc input)
326 mutex_lock(&wm831x->auxadc_lock);
328 ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
329 WM831X_AUX_ENA, WM831X_AUX_ENA);
331 dev_err(wm831x->dev, "Failed to enable AUXADC: %d\n", ret);
335 /* We force a single source at present */
337 ret = wm831x_reg_write(wm831x, WM831X_AUXADC_SOURCE,
340 dev_err(wm831x->dev, "Failed to set AUXADC source: %d\n", ret);
344 ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
345 WM831X_AUX_CVT_ENA, WM831X_AUX_CVT_ENA);
347 dev_err(wm831x->dev, "Failed to start AUXADC: %d\n", ret);
354 ret = wm831x_reg_read(wm831x, WM831X_AUXADC_CONTROL);
356 ret = WM831X_AUX_CVT_ENA;
357 } while ((ret & WM831X_AUX_CVT_ENA) && --tries);
359 if (ret & WM831X_AUX_CVT_ENA) {
360 dev_err(wm831x->dev, "Timed out reading AUXADC\n");
365 ret = wm831x_reg_read(wm831x, WM831X_AUXADC_DATA);
367 dev_err(wm831x->dev, "Failed to read AUXADC data: %d\n", ret);
369 src = ((ret & WM831X_AUX_DATA_SRC_MASK)
370 >> WM831X_AUX_DATA_SRC_SHIFT) - 1;
373 src = WM831X_AUX_CAL;
376 dev_err(wm831x->dev, "Data from source %d not %d\n",
380 ret &= WM831X_AUX_DATA_MASK;
385 wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, WM831X_AUX_ENA, 0);
387 mutex_unlock(&wm831x->auxadc_lock);
390 EXPORT_SYMBOL_GPL(wm831x_auxadc_read);
393 * wm831x_auxadc_read_uv: Read a voltage from the WM831x AUXADC
395 * @wm831x: Device to read from.
396 * @input: AUXADC input to read.
398 int wm831x_auxadc_read_uv(struct wm831x *wm831x, enum wm831x_auxadc input)
402 ret = wm831x_auxadc_read(wm831x, input);
410 EXPORT_SYMBOL_GPL(wm831x_auxadc_read_uv);
412 static struct resource wm831x_dcdc1_resources[] = {
414 .start = WM831X_DC1_CONTROL_1,
415 .end = WM831X_DC1_DVS_CONTROL,
416 .flags = IORESOURCE_IO,
420 .start = WM831X_IRQ_UV_DC1,
421 .end = WM831X_IRQ_UV_DC1,
422 .flags = IORESOURCE_IRQ,
426 .start = WM831X_IRQ_HC_DC1,
427 .end = WM831X_IRQ_HC_DC1,
428 .flags = IORESOURCE_IRQ,
433 static struct resource wm831x_dcdc2_resources[] = {
435 .start = WM831X_DC2_CONTROL_1,
436 .end = WM831X_DC2_DVS_CONTROL,
437 .flags = IORESOURCE_IO,
441 .start = WM831X_IRQ_UV_DC2,
442 .end = WM831X_IRQ_UV_DC2,
443 .flags = IORESOURCE_IRQ,
447 .start = WM831X_IRQ_HC_DC2,
448 .end = WM831X_IRQ_HC_DC2,
449 .flags = IORESOURCE_IRQ,
453 static struct resource wm831x_dcdc3_resources[] = {
455 .start = WM831X_DC3_CONTROL_1,
456 .end = WM831X_DC3_SLEEP_CONTROL,
457 .flags = IORESOURCE_IO,
461 .start = WM831X_IRQ_UV_DC3,
462 .end = WM831X_IRQ_UV_DC3,
463 .flags = IORESOURCE_IRQ,
467 static struct resource wm831x_dcdc4_resources[] = {
469 .start = WM831X_DC4_CONTROL,
470 .end = WM831X_DC4_SLEEP_CONTROL,
471 .flags = IORESOURCE_IO,
475 .start = WM831X_IRQ_UV_DC4,
476 .end = WM831X_IRQ_UV_DC4,
477 .flags = IORESOURCE_IRQ,
481 static struct resource wm831x_gpio_resources[] = {
483 .start = WM831X_IRQ_GPIO_1,
484 .end = WM831X_IRQ_GPIO_16,
485 .flags = IORESOURCE_IRQ,
489 static struct resource wm831x_isink1_resources[] = {
491 .start = WM831X_CURRENT_SINK_1,
492 .end = WM831X_CURRENT_SINK_1,
493 .flags = IORESOURCE_IO,
496 .start = WM831X_IRQ_CS1,
497 .end = WM831X_IRQ_CS1,
498 .flags = IORESOURCE_IRQ,
502 static struct resource wm831x_isink2_resources[] = {
504 .start = WM831X_CURRENT_SINK_2,
505 .end = WM831X_CURRENT_SINK_2,
506 .flags = IORESOURCE_IO,
509 .start = WM831X_IRQ_CS2,
510 .end = WM831X_IRQ_CS2,
511 .flags = IORESOURCE_IRQ,
515 static struct resource wm831x_ldo1_resources[] = {
517 .start = WM831X_LDO1_CONTROL,
518 .end = WM831X_LDO1_SLEEP_CONTROL,
519 .flags = IORESOURCE_IO,
523 .start = WM831X_IRQ_UV_LDO1,
524 .end = WM831X_IRQ_UV_LDO1,
525 .flags = IORESOURCE_IRQ,
529 static struct resource wm831x_ldo2_resources[] = {
531 .start = WM831X_LDO2_CONTROL,
532 .end = WM831X_LDO2_SLEEP_CONTROL,
533 .flags = IORESOURCE_IO,
537 .start = WM831X_IRQ_UV_LDO2,
538 .end = WM831X_IRQ_UV_LDO2,
539 .flags = IORESOURCE_IRQ,
543 static struct resource wm831x_ldo3_resources[] = {
545 .start = WM831X_LDO3_CONTROL,
546 .end = WM831X_LDO3_SLEEP_CONTROL,
547 .flags = IORESOURCE_IO,
551 .start = WM831X_IRQ_UV_LDO3,
552 .end = WM831X_IRQ_UV_LDO3,
553 .flags = IORESOURCE_IRQ,
557 static struct resource wm831x_ldo4_resources[] = {
559 .start = WM831X_LDO4_CONTROL,
560 .end = WM831X_LDO4_SLEEP_CONTROL,
561 .flags = IORESOURCE_IO,
565 .start = WM831X_IRQ_UV_LDO4,
566 .end = WM831X_IRQ_UV_LDO4,
567 .flags = IORESOURCE_IRQ,
571 static struct resource wm831x_ldo5_resources[] = {
573 .start = WM831X_LDO5_CONTROL,
574 .end = WM831X_LDO5_SLEEP_CONTROL,
575 .flags = IORESOURCE_IO,
579 .start = WM831X_IRQ_UV_LDO5,
580 .end = WM831X_IRQ_UV_LDO5,
581 .flags = IORESOURCE_IRQ,
585 static struct resource wm831x_ldo6_resources[] = {
587 .start = WM831X_LDO6_CONTROL,
588 .end = WM831X_LDO6_SLEEP_CONTROL,
589 .flags = IORESOURCE_IO,
593 .start = WM831X_IRQ_UV_LDO6,
594 .end = WM831X_IRQ_UV_LDO6,
595 .flags = IORESOURCE_IRQ,
599 static struct resource wm831x_ldo7_resources[] = {
601 .start = WM831X_LDO7_CONTROL,
602 .end = WM831X_LDO7_SLEEP_CONTROL,
603 .flags = IORESOURCE_IO,
607 .start = WM831X_IRQ_UV_LDO7,
608 .end = WM831X_IRQ_UV_LDO7,
609 .flags = IORESOURCE_IRQ,
613 static struct resource wm831x_ldo8_resources[] = {
615 .start = WM831X_LDO8_CONTROL,
616 .end = WM831X_LDO8_SLEEP_CONTROL,
617 .flags = IORESOURCE_IO,
621 .start = WM831X_IRQ_UV_LDO8,
622 .end = WM831X_IRQ_UV_LDO8,
623 .flags = IORESOURCE_IRQ,
627 static struct resource wm831x_ldo9_resources[] = {
629 .start = WM831X_LDO9_CONTROL,
630 .end = WM831X_LDO9_SLEEP_CONTROL,
631 .flags = IORESOURCE_IO,
635 .start = WM831X_IRQ_UV_LDO9,
636 .end = WM831X_IRQ_UV_LDO9,
637 .flags = IORESOURCE_IRQ,
641 static struct resource wm831x_ldo10_resources[] = {
643 .start = WM831X_LDO10_CONTROL,
644 .end = WM831X_LDO10_SLEEP_CONTROL,
645 .flags = IORESOURCE_IO,
649 .start = WM831X_IRQ_UV_LDO10,
650 .end = WM831X_IRQ_UV_LDO10,
651 .flags = IORESOURCE_IRQ,
655 static struct resource wm831x_ldo11_resources[] = {
657 .start = WM831X_LDO11_ON_CONTROL,
658 .end = WM831X_LDO11_SLEEP_CONTROL,
659 .flags = IORESOURCE_IO,
663 static struct resource wm831x_on_resources[] = {
665 .start = WM831X_IRQ_ON,
666 .end = WM831X_IRQ_ON,
667 .flags = IORESOURCE_IRQ,
672 static struct resource wm831x_power_resources[] = {
675 .start = WM831X_IRQ_PPM_SYSLO,
676 .end = WM831X_IRQ_PPM_SYSLO,
677 .flags = IORESOURCE_IRQ,
681 .start = WM831X_IRQ_PPM_PWR_SRC,
682 .end = WM831X_IRQ_PPM_PWR_SRC,
683 .flags = IORESOURCE_IRQ,
687 .start = WM831X_IRQ_PPM_USB_CURR,
688 .end = WM831X_IRQ_PPM_USB_CURR,
689 .flags = IORESOURCE_IRQ,
693 .start = WM831X_IRQ_CHG_BATT_HOT,
694 .end = WM831X_IRQ_CHG_BATT_HOT,
695 .flags = IORESOURCE_IRQ,
699 .start = WM831X_IRQ_CHG_BATT_COLD,
700 .end = WM831X_IRQ_CHG_BATT_COLD,
701 .flags = IORESOURCE_IRQ,
705 .start = WM831X_IRQ_CHG_BATT_FAIL,
706 .end = WM831X_IRQ_CHG_BATT_FAIL,
707 .flags = IORESOURCE_IRQ,
711 .start = WM831X_IRQ_CHG_OV,
712 .end = WM831X_IRQ_CHG_OV,
713 .flags = IORESOURCE_IRQ,
717 .start = WM831X_IRQ_CHG_END,
718 .end = WM831X_IRQ_CHG_END,
719 .flags = IORESOURCE_IRQ,
723 .start = WM831X_IRQ_CHG_TO,
724 .end = WM831X_IRQ_CHG_TO,
725 .flags = IORESOURCE_IRQ,
729 .start = WM831X_IRQ_CHG_MODE,
730 .end = WM831X_IRQ_CHG_MODE,
731 .flags = IORESOURCE_IRQ,
735 .start = WM831X_IRQ_CHG_START,
736 .end = WM831X_IRQ_CHG_START,
737 .flags = IORESOURCE_IRQ,
741 static struct resource wm831x_rtc_resources[] = {
744 .start = WM831X_IRQ_RTC_PER,
745 .end = WM831X_IRQ_RTC_PER,
746 .flags = IORESOURCE_IRQ,
750 .start = WM831X_IRQ_RTC_ALM,
751 .end = WM831X_IRQ_RTC_ALM,
752 .flags = IORESOURCE_IRQ,
756 static struct resource wm831x_status1_resources[] = {
758 .start = WM831X_STATUS_LED_1,
759 .end = WM831X_STATUS_LED_1,
760 .flags = IORESOURCE_IO,
764 static struct resource wm831x_status2_resources[] = {
766 .start = WM831X_STATUS_LED_2,
767 .end = WM831X_STATUS_LED_2,
768 .flags = IORESOURCE_IO,
772 static struct resource wm831x_touch_resources[] = {
775 .start = WM831X_IRQ_TCHPD,
776 .end = WM831X_IRQ_TCHPD,
777 .flags = IORESOURCE_IRQ,
781 .start = WM831X_IRQ_TCHDATA,
782 .end = WM831X_IRQ_TCHDATA,
783 .flags = IORESOURCE_IRQ,
787 static struct resource wm831x_wdt_resources[] = {
789 .start = WM831X_IRQ_WDOG_TO,
790 .end = WM831X_IRQ_WDOG_TO,
791 .flags = IORESOURCE_IRQ,
795 static struct mfd_cell wm8310_devs[] = {
797 .name = "wm831x-buckv",
799 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
800 .resources = wm831x_dcdc1_resources,
803 .name = "wm831x-buckv",
805 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
806 .resources = wm831x_dcdc2_resources,
809 .name = "wm831x-buckp",
811 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
812 .resources = wm831x_dcdc3_resources,
815 .name = "wm831x-boostp",
817 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
818 .resources = wm831x_dcdc4_resources,
821 .name = "wm831x-epe",
825 .name = "wm831x-epe",
829 .name = "wm831x-gpio",
830 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
831 .resources = wm831x_gpio_resources,
834 .name = "wm831x-hwmon",
837 .name = "wm831x-isink",
839 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
840 .resources = wm831x_isink1_resources,
843 .name = "wm831x-isink",
845 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
846 .resources = wm831x_isink2_resources,
849 .name = "wm831x-ldo",
851 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
852 .resources = wm831x_ldo1_resources,
855 .name = "wm831x-ldo",
857 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
858 .resources = wm831x_ldo2_resources,
861 .name = "wm831x-ldo",
863 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
864 .resources = wm831x_ldo3_resources,
867 .name = "wm831x-ldo",
869 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
870 .resources = wm831x_ldo4_resources,
873 .name = "wm831x-ldo",
875 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
876 .resources = wm831x_ldo5_resources,
879 .name = "wm831x-ldo",
881 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
882 .resources = wm831x_ldo6_resources,
885 .name = "wm831x-aldo",
887 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
888 .resources = wm831x_ldo7_resources,
891 .name = "wm831x-aldo",
893 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
894 .resources = wm831x_ldo8_resources,
897 .name = "wm831x-aldo",
899 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
900 .resources = wm831x_ldo9_resources,
903 .name = "wm831x-aldo",
905 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
906 .resources = wm831x_ldo10_resources,
909 .name = "wm831x-alive-ldo",
911 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
912 .resources = wm831x_ldo11_resources,
916 .num_resources = ARRAY_SIZE(wm831x_on_resources),
917 .resources = wm831x_on_resources,
920 .name = "wm831x-power",
921 .num_resources = ARRAY_SIZE(wm831x_power_resources),
922 .resources = wm831x_power_resources,
925 .name = "wm831x-rtc",
926 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
927 .resources = wm831x_rtc_resources,
930 .name = "wm831x-status",
932 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
933 .resources = wm831x_status1_resources,
936 .name = "wm831x-status",
938 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
939 .resources = wm831x_status2_resources,
942 .name = "wm831x-watchdog",
943 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
944 .resources = wm831x_wdt_resources,
948 static struct mfd_cell wm8311_devs[] = {
950 .name = "wm831x-buckv",
952 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
953 .resources = wm831x_dcdc1_resources,
956 .name = "wm831x-buckv",
958 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
959 .resources = wm831x_dcdc2_resources,
962 .name = "wm831x-buckp",
964 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
965 .resources = wm831x_dcdc3_resources,
968 .name = "wm831x-boostp",
970 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
971 .resources = wm831x_dcdc4_resources,
974 .name = "wm831x-epe",
978 .name = "wm831x-epe",
982 .name = "wm831x-gpio",
983 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
984 .resources = wm831x_gpio_resources,
987 .name = "wm831x-hwmon",
990 .name = "wm831x-isink",
992 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
993 .resources = wm831x_isink1_resources,
996 .name = "wm831x-isink",
998 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
999 .resources = wm831x_isink2_resources,
1002 .name = "wm831x-ldo",
1004 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1005 .resources = wm831x_ldo1_resources,
1008 .name = "wm831x-ldo",
1010 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1011 .resources = wm831x_ldo2_resources,
1014 .name = "wm831x-ldo",
1016 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1017 .resources = wm831x_ldo3_resources,
1020 .name = "wm831x-ldo",
1022 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1023 .resources = wm831x_ldo4_resources,
1026 .name = "wm831x-ldo",
1028 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1029 .resources = wm831x_ldo5_resources,
1032 .name = "wm831x-aldo",
1034 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1035 .resources = wm831x_ldo7_resources,
1038 .name = "wm831x-alive-ldo",
1040 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1041 .resources = wm831x_ldo11_resources,
1044 .name = "wm831x-on",
1045 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1046 .resources = wm831x_on_resources,
1049 .name = "wm831x-power",
1050 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1051 .resources = wm831x_power_resources,
1054 .name = "wm831x-rtc",
1055 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1056 .resources = wm831x_rtc_resources,
1059 .name = "wm831x-status",
1061 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1062 .resources = wm831x_status1_resources,
1065 .name = "wm831x-status",
1067 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1068 .resources = wm831x_status2_resources,
1071 .name = "wm831x-touch",
1072 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1073 .resources = wm831x_touch_resources,
1076 .name = "wm831x-watchdog",
1077 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1078 .resources = wm831x_wdt_resources,
1082 static struct mfd_cell wm8312_devs[] = {
1084 .name = "wm831x-buckv",
1086 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1087 .resources = wm831x_dcdc1_resources,
1090 .name = "wm831x-buckv",
1092 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1093 .resources = wm831x_dcdc2_resources,
1096 .name = "wm831x-buckp",
1098 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1099 .resources = wm831x_dcdc3_resources,
1102 .name = "wm831x-boostp",
1104 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1105 .resources = wm831x_dcdc4_resources,
1108 .name = "wm831x-epe",
1112 .name = "wm831x-epe",
1116 .name = "wm831x-gpio",
1117 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1118 .resources = wm831x_gpio_resources,
1121 .name = "wm831x-hwmon",
1124 .name = "wm831x-isink",
1126 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1127 .resources = wm831x_isink1_resources,
1130 .name = "wm831x-isink",
1132 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1133 .resources = wm831x_isink2_resources,
1136 .name = "wm831x-ldo",
1138 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1139 .resources = wm831x_ldo1_resources,
1142 .name = "wm831x-ldo",
1144 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1145 .resources = wm831x_ldo2_resources,
1148 .name = "wm831x-ldo",
1150 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1151 .resources = wm831x_ldo3_resources,
1154 .name = "wm831x-ldo",
1156 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1157 .resources = wm831x_ldo4_resources,
1160 .name = "wm831x-ldo",
1162 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1163 .resources = wm831x_ldo5_resources,
1166 .name = "wm831x-ldo",
1168 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1169 .resources = wm831x_ldo6_resources,
1172 .name = "wm831x-aldo",
1174 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1175 .resources = wm831x_ldo7_resources,
1178 .name = "wm831x-aldo",
1180 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1181 .resources = wm831x_ldo8_resources,
1184 .name = "wm831x-aldo",
1186 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1187 .resources = wm831x_ldo9_resources,
1190 .name = "wm831x-aldo",
1192 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1193 .resources = wm831x_ldo10_resources,
1196 .name = "wm831x-alive-ldo",
1198 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1199 .resources = wm831x_ldo11_resources,
1202 .name = "wm831x-on",
1203 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1204 .resources = wm831x_on_resources,
1207 .name = "wm831x-power",
1208 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1209 .resources = wm831x_power_resources,
1212 .name = "wm831x-rtc",
1213 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1214 .resources = wm831x_rtc_resources,
1217 .name = "wm831x-status",
1219 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1220 .resources = wm831x_status1_resources,
1223 .name = "wm831x-status",
1225 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1226 .resources = wm831x_status2_resources,
1229 .name = "wm831x-touch",
1230 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1231 .resources = wm831x_touch_resources,
1234 .name = "wm831x-watchdog",
1235 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1236 .resources = wm831x_wdt_resources,
1240 static struct mfd_cell backlight_devs[] = {
1242 .name = "wm831x-backlight",
1247 * Instantiate the generic non-control parts of the device.
1249 static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
1251 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
1253 enum wm831x_parent parent;
1256 mutex_init(&wm831x->io_lock);
1257 mutex_init(&wm831x->key_lock);
1258 mutex_init(&wm831x->auxadc_lock);
1259 dev_set_drvdata(wm831x->dev, wm831x);
1261 ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1263 dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1266 if (ret != 0x6204) {
1267 dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1272 ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1274 dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1277 rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1279 ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1281 dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1290 dev_info(wm831x->dev, "WM8310 revision %c\n",
1300 dev_info(wm831x->dev, "WM8311 revision %c\n",
1310 dev_info(wm831x->dev, "WM8312 revision %c\n",
1317 /* Some engineering samples do not have the ID set,
1318 * rely on the device being registered correctly.
1319 * This will need revisiting for future devices with
1325 dev_info(wm831x->dev, "WM831%d ES revision %c\n",
1332 dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1337 /* This will need revisiting in future but is OK for all
1341 dev_warn(wm831x->dev, "Device was registered as a WM831%lu\n",
1344 /* Bootstrap the user key */
1345 ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1347 dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1351 dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1353 wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1357 if (pdata && pdata->pre_init) {
1358 ret = pdata->pre_init(wm831x);
1360 dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1365 ret = wm831x_irq_init(wm831x, irq);
1369 /* The core device is up, instantiate the subdevices. */
1372 ret = mfd_add_devices(wm831x->dev, -1,
1373 wm8310_devs, ARRAY_SIZE(wm8310_devs),
1378 ret = mfd_add_devices(wm831x->dev, -1,
1379 wm8311_devs, ARRAY_SIZE(wm8311_devs),
1384 ret = mfd_add_devices(wm831x->dev, -1,
1385 wm8312_devs, ARRAY_SIZE(wm8312_devs),
1390 /* If this happens the bus probe function is buggy */
1395 dev_err(wm831x->dev, "Failed to add children\n");
1399 if (pdata && pdata->backlight) {
1400 /* Treat errors as non-critical */
1401 ret = mfd_add_devices(wm831x->dev, -1, backlight_devs,
1402 ARRAY_SIZE(backlight_devs), NULL, 0);
1404 dev_err(wm831x->dev, "Failed to add backlight: %d\n",
1408 wm831x_otp_init(wm831x);
1410 if (pdata && pdata->post_init) {
1411 ret = pdata->post_init(wm831x);
1413 dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1421 wm831x_irq_exit(wm831x);
1423 mfd_remove_devices(wm831x->dev);
1428 static void wm831x_device_exit(struct wm831x *wm831x)
1430 wm831x_otp_exit(wm831x);
1431 mfd_remove_devices(wm831x->dev);
1432 wm831x_irq_exit(wm831x);
1436 static int wm831x_i2c_read_device(struct wm831x *wm831x, unsigned short reg,
1437 int bytes, void *dest)
1439 struct i2c_client *i2c = wm831x->control_data;
1441 u16 r = cpu_to_be16(reg);
1443 ret = i2c_master_send(i2c, (unsigned char *)&r, 2);
1449 ret = i2c_master_recv(i2c, dest, bytes);
1457 /* Currently we allocate the write buffer on the stack; this is OK for
1458 * small writes - if we need to do large writes this will need to be
1461 static int wm831x_i2c_write_device(struct wm831x *wm831x, unsigned short reg,
1462 int bytes, void *src)
1464 struct i2c_client *i2c = wm831x->control_data;
1465 unsigned char msg[bytes + 2];
1468 reg = cpu_to_be16(reg);
1469 memcpy(&msg[0], ®, 2);
1470 memcpy(&msg[2], src, bytes);
1472 ret = i2c_master_send(i2c, msg, bytes + 2);
1475 if (ret < bytes + 2)
1481 static int wm831x_i2c_probe(struct i2c_client *i2c,
1482 const struct i2c_device_id *id)
1484 struct wm831x *wm831x;
1486 wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
1487 if (wm831x == NULL) {
1492 i2c_set_clientdata(i2c, wm831x);
1493 wm831x->dev = &i2c->dev;
1494 wm831x->control_data = i2c;
1495 wm831x->read_dev = wm831x_i2c_read_device;
1496 wm831x->write_dev = wm831x_i2c_write_device;
1498 return wm831x_device_init(wm831x, id->driver_data, i2c->irq);
1501 static int wm831x_i2c_remove(struct i2c_client *i2c)
1503 struct wm831x *wm831x = i2c_get_clientdata(i2c);
1505 wm831x_device_exit(wm831x);
1510 static const struct i2c_device_id wm831x_i2c_id[] = {
1511 { "wm8310", WM8310 },
1512 { "wm8311", WM8311 },
1513 { "wm8312", WM8312 },
1516 MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
1519 static struct i2c_driver wm831x_i2c_driver = {
1522 .owner = THIS_MODULE,
1524 .probe = wm831x_i2c_probe,
1525 .remove = wm831x_i2c_remove,
1526 .id_table = wm831x_i2c_id,
1529 static int __init wm831x_i2c_init(void)
1533 ret = i2c_add_driver(&wm831x_i2c_driver);
1535 pr_err("Failed to register wm831x I2C driver: %d\n", ret);
1539 subsys_initcall(wm831x_i2c_init);
1541 static void __exit wm831x_i2c_exit(void)
1543 i2c_del_driver(&wm831x_i2c_driver);
1545 module_exit(wm831x_i2c_exit);
1547 MODULE_DESCRIPTION("I2C support for the WM831X AudioPlus PMIC");
1548 MODULE_LICENSE("GPL");
1549 MODULE_AUTHOR("Mark Brown");