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);
99 static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg)
105 case WM831X_WATCHDOG:
106 case WM831X_DC4_CONTROL:
107 case WM831X_ON_PIN_CONTROL:
108 case WM831X_BACKUP_CHARGER_CONTROL:
109 case WM831X_CHARGER_CONTROL_1:
110 case WM831X_CHARGER_CONTROL_2:
119 * wm831x_reg_unlock: Unlock user keyed registers
121 * The WM831x has a user key preventing writes to particularly
122 * critical registers. This function locks those registers,
123 * allowing writes to them.
125 void wm831x_reg_lock(struct wm831x *wm831x)
129 ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
131 dev_vdbg(wm831x->dev, "Registers locked\n");
133 mutex_lock(&wm831x->io_lock);
134 WARN_ON(wm831x->locked);
136 mutex_unlock(&wm831x->io_lock);
138 dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret);
142 EXPORT_SYMBOL_GPL(wm831x_reg_lock);
145 * wm831x_reg_unlock: Unlock user keyed registers
147 * The WM831x has a user key preventing writes to particularly
148 * critical registers. This function locks those registers,
149 * preventing spurious writes.
151 int wm831x_reg_unlock(struct wm831x *wm831x)
155 /* 0x9716 is the value required to unlock the registers */
156 ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716);
158 dev_vdbg(wm831x->dev, "Registers unlocked\n");
160 mutex_lock(&wm831x->io_lock);
161 WARN_ON(!wm831x->locked);
163 mutex_unlock(&wm831x->io_lock);
168 EXPORT_SYMBOL_GPL(wm831x_reg_unlock);
170 static int wm831x_read(struct wm831x *wm831x, unsigned short reg,
171 int bytes, void *dest)
179 ret = wm831x->read_dev(wm831x, reg, bytes, dest);
183 for (i = 0; i < bytes / 2; i++) {
184 buf[i] = be16_to_cpu(buf[i]);
186 dev_vdbg(wm831x->dev, "Read %04x from R%d(0x%x)\n",
187 buf[i], reg + i, reg + i);
194 * wm831x_reg_read: Read a single WM831x register.
196 * @wm831x: Device to read from.
197 * @reg: Register to read.
199 int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
204 mutex_lock(&wm831x->io_lock);
206 ret = wm831x_read(wm831x, reg, 2, &val);
208 mutex_unlock(&wm831x->io_lock);
215 EXPORT_SYMBOL_GPL(wm831x_reg_read);
218 * wm831x_bulk_read: Read multiple WM831x registers
220 * @wm831x: Device to read from
221 * @reg: First register
222 * @count: Number of registers
223 * @buf: Buffer to fill.
225 int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
230 mutex_lock(&wm831x->io_lock);
232 ret = wm831x_read(wm831x, reg, count * 2, buf);
234 mutex_unlock(&wm831x->io_lock);
238 EXPORT_SYMBOL_GPL(wm831x_bulk_read);
240 static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
241 int bytes, void *src)
249 for (i = 0; i < bytes / 2; i++) {
250 if (wm831x_reg_locked(wm831x, reg))
253 dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
254 buf[i], reg + i, reg + i);
256 buf[i] = cpu_to_be16(buf[i]);
259 return wm831x->write_dev(wm831x, reg, bytes, src);
263 * wm831x_reg_write: Write a single WM831x register.
265 * @wm831x: Device to write to.
266 * @reg: Register to write to.
267 * @val: Value to write.
269 int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg,
274 mutex_lock(&wm831x->io_lock);
276 ret = wm831x_write(wm831x, reg, 2, &val);
278 mutex_unlock(&wm831x->io_lock);
282 EXPORT_SYMBOL_GPL(wm831x_reg_write);
285 * wm831x_set_bits: Set the value of a bitfield in a WM831x register
287 * @wm831x: Device to write to.
288 * @reg: Register to write to.
289 * @mask: Mask of bits to set.
290 * @val: Value to set (unshifted)
292 int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
293 unsigned short mask, unsigned short val)
298 mutex_lock(&wm831x->io_lock);
300 ret = wm831x_read(wm831x, reg, 2, &r);
307 ret = wm831x_write(wm831x, reg, 2, &r);
310 mutex_unlock(&wm831x->io_lock);
314 EXPORT_SYMBOL_GPL(wm831x_set_bits);
317 * wm831x_auxadc_read: Read a value from the WM831x AUXADC
319 * @wm831x: Device to read from.
320 * @input: AUXADC input to read.
322 int wm831x_auxadc_read(struct wm831x *wm831x, enum wm831x_auxadc input)
327 mutex_lock(&wm831x->auxadc_lock);
329 ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
330 WM831X_AUX_ENA, WM831X_AUX_ENA);
332 dev_err(wm831x->dev, "Failed to enable AUXADC: %d\n", ret);
336 /* We force a single source at present */
338 ret = wm831x_reg_write(wm831x, WM831X_AUXADC_SOURCE,
341 dev_err(wm831x->dev, "Failed to set AUXADC source: %d\n", ret);
345 ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
346 WM831X_AUX_CVT_ENA, WM831X_AUX_CVT_ENA);
348 dev_err(wm831x->dev, "Failed to start AUXADC: %d\n", ret);
355 ret = wm831x_reg_read(wm831x, WM831X_AUXADC_CONTROL);
357 ret = WM831X_AUX_CVT_ENA;
358 } while ((ret & WM831X_AUX_CVT_ENA) && --tries);
360 if (ret & WM831X_AUX_CVT_ENA) {
361 dev_err(wm831x->dev, "Timed out reading AUXADC\n");
366 ret = wm831x_reg_read(wm831x, WM831X_AUXADC_DATA);
368 dev_err(wm831x->dev, "Failed to read AUXADC data: %d\n", ret);
370 src = ((ret & WM831X_AUX_DATA_SRC_MASK)
371 >> WM831X_AUX_DATA_SRC_SHIFT) - 1;
374 src = WM831X_AUX_CAL;
377 dev_err(wm831x->dev, "Data from source %d not %d\n",
381 ret &= WM831X_AUX_DATA_MASK;
386 wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, WM831X_AUX_ENA, 0);
388 mutex_unlock(&wm831x->auxadc_lock);
391 EXPORT_SYMBOL_GPL(wm831x_auxadc_read);
394 * wm831x_auxadc_read_uv: Read a voltage from the WM831x AUXADC
396 * @wm831x: Device to read from.
397 * @input: AUXADC input to read.
399 int wm831x_auxadc_read_uv(struct wm831x *wm831x, enum wm831x_auxadc input)
403 ret = wm831x_auxadc_read(wm831x, input);
411 EXPORT_SYMBOL_GPL(wm831x_auxadc_read_uv);
413 static struct resource wm831x_dcdc1_resources[] = {
415 .start = WM831X_DC1_CONTROL_1,
416 .end = WM831X_DC1_DVS_CONTROL,
417 .flags = IORESOURCE_IO,
421 .start = WM831X_IRQ_UV_DC1,
422 .end = WM831X_IRQ_UV_DC1,
423 .flags = IORESOURCE_IRQ,
427 .start = WM831X_IRQ_HC_DC1,
428 .end = WM831X_IRQ_HC_DC1,
429 .flags = IORESOURCE_IRQ,
434 static struct resource wm831x_dcdc2_resources[] = {
436 .start = WM831X_DC2_CONTROL_1,
437 .end = WM831X_DC2_DVS_CONTROL,
438 .flags = IORESOURCE_IO,
442 .start = WM831X_IRQ_UV_DC2,
443 .end = WM831X_IRQ_UV_DC2,
444 .flags = IORESOURCE_IRQ,
448 .start = WM831X_IRQ_HC_DC2,
449 .end = WM831X_IRQ_HC_DC2,
450 .flags = IORESOURCE_IRQ,
454 static struct resource wm831x_dcdc3_resources[] = {
456 .start = WM831X_DC3_CONTROL_1,
457 .end = WM831X_DC3_SLEEP_CONTROL,
458 .flags = IORESOURCE_IO,
462 .start = WM831X_IRQ_UV_DC3,
463 .end = WM831X_IRQ_UV_DC3,
464 .flags = IORESOURCE_IRQ,
468 static struct resource wm831x_dcdc4_resources[] = {
470 .start = WM831X_DC4_CONTROL,
471 .end = WM831X_DC4_SLEEP_CONTROL,
472 .flags = IORESOURCE_IO,
476 .start = WM831X_IRQ_UV_DC4,
477 .end = WM831X_IRQ_UV_DC4,
478 .flags = IORESOURCE_IRQ,
482 static struct resource wm8320_dcdc4_buck_resources[] = {
484 .start = WM831X_DC4_CONTROL,
485 .end = WM832X_DC4_SLEEP_CONTROL,
486 .flags = IORESOURCE_IO,
490 .start = WM831X_IRQ_UV_DC4,
491 .end = WM831X_IRQ_UV_DC4,
492 .flags = IORESOURCE_IRQ,
496 static struct resource wm831x_gpio_resources[] = {
498 .start = WM831X_IRQ_GPIO_1,
499 .end = WM831X_IRQ_GPIO_16,
500 .flags = IORESOURCE_IRQ,
504 static struct resource wm831x_isink1_resources[] = {
506 .start = WM831X_CURRENT_SINK_1,
507 .end = WM831X_CURRENT_SINK_1,
508 .flags = IORESOURCE_IO,
511 .start = WM831X_IRQ_CS1,
512 .end = WM831X_IRQ_CS1,
513 .flags = IORESOURCE_IRQ,
517 static struct resource wm831x_isink2_resources[] = {
519 .start = WM831X_CURRENT_SINK_2,
520 .end = WM831X_CURRENT_SINK_2,
521 .flags = IORESOURCE_IO,
524 .start = WM831X_IRQ_CS2,
525 .end = WM831X_IRQ_CS2,
526 .flags = IORESOURCE_IRQ,
530 static struct resource wm831x_ldo1_resources[] = {
532 .start = WM831X_LDO1_CONTROL,
533 .end = WM831X_LDO1_SLEEP_CONTROL,
534 .flags = IORESOURCE_IO,
538 .start = WM831X_IRQ_UV_LDO1,
539 .end = WM831X_IRQ_UV_LDO1,
540 .flags = IORESOURCE_IRQ,
544 static struct resource wm831x_ldo2_resources[] = {
546 .start = WM831X_LDO2_CONTROL,
547 .end = WM831X_LDO2_SLEEP_CONTROL,
548 .flags = IORESOURCE_IO,
552 .start = WM831X_IRQ_UV_LDO2,
553 .end = WM831X_IRQ_UV_LDO2,
554 .flags = IORESOURCE_IRQ,
558 static struct resource wm831x_ldo3_resources[] = {
560 .start = WM831X_LDO3_CONTROL,
561 .end = WM831X_LDO3_SLEEP_CONTROL,
562 .flags = IORESOURCE_IO,
566 .start = WM831X_IRQ_UV_LDO3,
567 .end = WM831X_IRQ_UV_LDO3,
568 .flags = IORESOURCE_IRQ,
572 static struct resource wm831x_ldo4_resources[] = {
574 .start = WM831X_LDO4_CONTROL,
575 .end = WM831X_LDO4_SLEEP_CONTROL,
576 .flags = IORESOURCE_IO,
580 .start = WM831X_IRQ_UV_LDO4,
581 .end = WM831X_IRQ_UV_LDO4,
582 .flags = IORESOURCE_IRQ,
586 static struct resource wm831x_ldo5_resources[] = {
588 .start = WM831X_LDO5_CONTROL,
589 .end = WM831X_LDO5_SLEEP_CONTROL,
590 .flags = IORESOURCE_IO,
594 .start = WM831X_IRQ_UV_LDO5,
595 .end = WM831X_IRQ_UV_LDO5,
596 .flags = IORESOURCE_IRQ,
600 static struct resource wm831x_ldo6_resources[] = {
602 .start = WM831X_LDO6_CONTROL,
603 .end = WM831X_LDO6_SLEEP_CONTROL,
604 .flags = IORESOURCE_IO,
608 .start = WM831X_IRQ_UV_LDO6,
609 .end = WM831X_IRQ_UV_LDO6,
610 .flags = IORESOURCE_IRQ,
614 static struct resource wm831x_ldo7_resources[] = {
616 .start = WM831X_LDO7_CONTROL,
617 .end = WM831X_LDO7_SLEEP_CONTROL,
618 .flags = IORESOURCE_IO,
622 .start = WM831X_IRQ_UV_LDO7,
623 .end = WM831X_IRQ_UV_LDO7,
624 .flags = IORESOURCE_IRQ,
628 static struct resource wm831x_ldo8_resources[] = {
630 .start = WM831X_LDO8_CONTROL,
631 .end = WM831X_LDO8_SLEEP_CONTROL,
632 .flags = IORESOURCE_IO,
636 .start = WM831X_IRQ_UV_LDO8,
637 .end = WM831X_IRQ_UV_LDO8,
638 .flags = IORESOURCE_IRQ,
642 static struct resource wm831x_ldo9_resources[] = {
644 .start = WM831X_LDO9_CONTROL,
645 .end = WM831X_LDO9_SLEEP_CONTROL,
646 .flags = IORESOURCE_IO,
650 .start = WM831X_IRQ_UV_LDO9,
651 .end = WM831X_IRQ_UV_LDO9,
652 .flags = IORESOURCE_IRQ,
656 static struct resource wm831x_ldo10_resources[] = {
658 .start = WM831X_LDO10_CONTROL,
659 .end = WM831X_LDO10_SLEEP_CONTROL,
660 .flags = IORESOURCE_IO,
664 .start = WM831X_IRQ_UV_LDO10,
665 .end = WM831X_IRQ_UV_LDO10,
666 .flags = IORESOURCE_IRQ,
670 static struct resource wm831x_ldo11_resources[] = {
672 .start = WM831X_LDO11_ON_CONTROL,
673 .end = WM831X_LDO11_SLEEP_CONTROL,
674 .flags = IORESOURCE_IO,
678 static struct resource wm831x_on_resources[] = {
680 .start = WM831X_IRQ_ON,
681 .end = WM831X_IRQ_ON,
682 .flags = IORESOURCE_IRQ,
687 static struct resource wm831x_power_resources[] = {
690 .start = WM831X_IRQ_PPM_SYSLO,
691 .end = WM831X_IRQ_PPM_SYSLO,
692 .flags = IORESOURCE_IRQ,
696 .start = WM831X_IRQ_PPM_PWR_SRC,
697 .end = WM831X_IRQ_PPM_PWR_SRC,
698 .flags = IORESOURCE_IRQ,
702 .start = WM831X_IRQ_PPM_USB_CURR,
703 .end = WM831X_IRQ_PPM_USB_CURR,
704 .flags = IORESOURCE_IRQ,
708 .start = WM831X_IRQ_CHG_BATT_HOT,
709 .end = WM831X_IRQ_CHG_BATT_HOT,
710 .flags = IORESOURCE_IRQ,
714 .start = WM831X_IRQ_CHG_BATT_COLD,
715 .end = WM831X_IRQ_CHG_BATT_COLD,
716 .flags = IORESOURCE_IRQ,
720 .start = WM831X_IRQ_CHG_BATT_FAIL,
721 .end = WM831X_IRQ_CHG_BATT_FAIL,
722 .flags = IORESOURCE_IRQ,
726 .start = WM831X_IRQ_CHG_OV,
727 .end = WM831X_IRQ_CHG_OV,
728 .flags = IORESOURCE_IRQ,
732 .start = WM831X_IRQ_CHG_END,
733 .end = WM831X_IRQ_CHG_END,
734 .flags = IORESOURCE_IRQ,
738 .start = WM831X_IRQ_CHG_TO,
739 .end = WM831X_IRQ_CHG_TO,
740 .flags = IORESOURCE_IRQ,
744 .start = WM831X_IRQ_CHG_MODE,
745 .end = WM831X_IRQ_CHG_MODE,
746 .flags = IORESOURCE_IRQ,
750 .start = WM831X_IRQ_CHG_START,
751 .end = WM831X_IRQ_CHG_START,
752 .flags = IORESOURCE_IRQ,
756 static struct resource wm831x_rtc_resources[] = {
759 .start = WM831X_IRQ_RTC_PER,
760 .end = WM831X_IRQ_RTC_PER,
761 .flags = IORESOURCE_IRQ,
765 .start = WM831X_IRQ_RTC_ALM,
766 .end = WM831X_IRQ_RTC_ALM,
767 .flags = IORESOURCE_IRQ,
771 static struct resource wm831x_status1_resources[] = {
773 .start = WM831X_STATUS_LED_1,
774 .end = WM831X_STATUS_LED_1,
775 .flags = IORESOURCE_IO,
779 static struct resource wm831x_status2_resources[] = {
781 .start = WM831X_STATUS_LED_2,
782 .end = WM831X_STATUS_LED_2,
783 .flags = IORESOURCE_IO,
787 static struct resource wm831x_touch_resources[] = {
790 .start = WM831X_IRQ_TCHPD,
791 .end = WM831X_IRQ_TCHPD,
792 .flags = IORESOURCE_IRQ,
796 .start = WM831X_IRQ_TCHDATA,
797 .end = WM831X_IRQ_TCHDATA,
798 .flags = IORESOURCE_IRQ,
802 static struct resource wm831x_wdt_resources[] = {
804 .start = WM831X_IRQ_WDOG_TO,
805 .end = WM831X_IRQ_WDOG_TO,
806 .flags = IORESOURCE_IRQ,
810 static struct mfd_cell wm8310_devs[] = {
812 .name = "wm831x-buckv",
814 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
815 .resources = wm831x_dcdc1_resources,
818 .name = "wm831x-buckv",
820 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
821 .resources = wm831x_dcdc2_resources,
824 .name = "wm831x-buckp",
826 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
827 .resources = wm831x_dcdc3_resources,
830 .name = "wm831x-boostp",
832 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
833 .resources = wm831x_dcdc4_resources,
836 .name = "wm831x-epe",
840 .name = "wm831x-epe",
844 .name = "wm831x-gpio",
845 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
846 .resources = wm831x_gpio_resources,
849 .name = "wm831x-hwmon",
852 .name = "wm831x-isink",
854 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
855 .resources = wm831x_isink1_resources,
858 .name = "wm831x-isink",
860 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
861 .resources = wm831x_isink2_resources,
864 .name = "wm831x-ldo",
866 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
867 .resources = wm831x_ldo1_resources,
870 .name = "wm831x-ldo",
872 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
873 .resources = wm831x_ldo2_resources,
876 .name = "wm831x-ldo",
878 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
879 .resources = wm831x_ldo3_resources,
882 .name = "wm831x-ldo",
884 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
885 .resources = wm831x_ldo4_resources,
888 .name = "wm831x-ldo",
890 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
891 .resources = wm831x_ldo5_resources,
894 .name = "wm831x-ldo",
896 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
897 .resources = wm831x_ldo6_resources,
900 .name = "wm831x-aldo",
902 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
903 .resources = wm831x_ldo7_resources,
906 .name = "wm831x-aldo",
908 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
909 .resources = wm831x_ldo8_resources,
912 .name = "wm831x-aldo",
914 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
915 .resources = wm831x_ldo9_resources,
918 .name = "wm831x-aldo",
920 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
921 .resources = wm831x_ldo10_resources,
924 .name = "wm831x-alive-ldo",
926 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
927 .resources = wm831x_ldo11_resources,
931 .num_resources = ARRAY_SIZE(wm831x_on_resources),
932 .resources = wm831x_on_resources,
935 .name = "wm831x-power",
936 .num_resources = ARRAY_SIZE(wm831x_power_resources),
937 .resources = wm831x_power_resources,
940 .name = "wm831x-rtc",
941 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
942 .resources = wm831x_rtc_resources,
945 .name = "wm831x-status",
947 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
948 .resources = wm831x_status1_resources,
951 .name = "wm831x-status",
953 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
954 .resources = wm831x_status2_resources,
957 .name = "wm831x-watchdog",
958 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
959 .resources = wm831x_wdt_resources,
963 static struct mfd_cell wm8311_devs[] = {
965 .name = "wm831x-buckv",
967 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
968 .resources = wm831x_dcdc1_resources,
971 .name = "wm831x-buckv",
973 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
974 .resources = wm831x_dcdc2_resources,
977 .name = "wm831x-buckp",
979 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
980 .resources = wm831x_dcdc3_resources,
983 .name = "wm831x-boostp",
985 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
986 .resources = wm831x_dcdc4_resources,
989 .name = "wm831x-epe",
993 .name = "wm831x-epe",
997 .name = "wm831x-gpio",
998 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
999 .resources = wm831x_gpio_resources,
1002 .name = "wm831x-hwmon",
1005 .name = "wm831x-isink",
1007 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1008 .resources = wm831x_isink1_resources,
1011 .name = "wm831x-isink",
1013 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1014 .resources = wm831x_isink2_resources,
1017 .name = "wm831x-ldo",
1019 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1020 .resources = wm831x_ldo1_resources,
1023 .name = "wm831x-ldo",
1025 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1026 .resources = wm831x_ldo2_resources,
1029 .name = "wm831x-ldo",
1031 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1032 .resources = wm831x_ldo3_resources,
1035 .name = "wm831x-ldo",
1037 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1038 .resources = wm831x_ldo4_resources,
1041 .name = "wm831x-ldo",
1043 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1044 .resources = wm831x_ldo5_resources,
1047 .name = "wm831x-aldo",
1049 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1050 .resources = wm831x_ldo7_resources,
1053 .name = "wm831x-alive-ldo",
1055 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1056 .resources = wm831x_ldo11_resources,
1059 .name = "wm831x-on",
1060 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1061 .resources = wm831x_on_resources,
1064 .name = "wm831x-power",
1065 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1066 .resources = wm831x_power_resources,
1069 .name = "wm831x-rtc",
1070 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1071 .resources = wm831x_rtc_resources,
1074 .name = "wm831x-status",
1076 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1077 .resources = wm831x_status1_resources,
1080 .name = "wm831x-status",
1082 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1083 .resources = wm831x_status2_resources,
1086 .name = "wm831x-touch",
1087 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1088 .resources = wm831x_touch_resources,
1091 .name = "wm831x-watchdog",
1092 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1093 .resources = wm831x_wdt_resources,
1097 static struct mfd_cell wm8312_devs[] = {
1099 .name = "wm831x-buckv",
1101 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1102 .resources = wm831x_dcdc1_resources,
1105 .name = "wm831x-buckv",
1107 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1108 .resources = wm831x_dcdc2_resources,
1111 .name = "wm831x-buckp",
1113 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1114 .resources = wm831x_dcdc3_resources,
1117 .name = "wm831x-boostp",
1119 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1120 .resources = wm831x_dcdc4_resources,
1123 .name = "wm831x-epe",
1127 .name = "wm831x-epe",
1131 .name = "wm831x-gpio",
1132 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1133 .resources = wm831x_gpio_resources,
1136 .name = "wm831x-hwmon",
1139 .name = "wm831x-isink",
1141 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1142 .resources = wm831x_isink1_resources,
1145 .name = "wm831x-isink",
1147 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1148 .resources = wm831x_isink2_resources,
1151 .name = "wm831x-ldo",
1153 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1154 .resources = wm831x_ldo1_resources,
1157 .name = "wm831x-ldo",
1159 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1160 .resources = wm831x_ldo2_resources,
1163 .name = "wm831x-ldo",
1165 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1166 .resources = wm831x_ldo3_resources,
1169 .name = "wm831x-ldo",
1171 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1172 .resources = wm831x_ldo4_resources,
1175 .name = "wm831x-ldo",
1177 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1178 .resources = wm831x_ldo5_resources,
1181 .name = "wm831x-ldo",
1183 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1184 .resources = wm831x_ldo6_resources,
1187 .name = "wm831x-aldo",
1189 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1190 .resources = wm831x_ldo7_resources,
1193 .name = "wm831x-aldo",
1195 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1196 .resources = wm831x_ldo8_resources,
1199 .name = "wm831x-aldo",
1201 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1202 .resources = wm831x_ldo9_resources,
1205 .name = "wm831x-aldo",
1207 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1208 .resources = wm831x_ldo10_resources,
1211 .name = "wm831x-alive-ldo",
1213 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1214 .resources = wm831x_ldo11_resources,
1217 .name = "wm831x-on",
1218 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1219 .resources = wm831x_on_resources,
1222 .name = "wm831x-power",
1223 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1224 .resources = wm831x_power_resources,
1227 .name = "wm831x-rtc",
1228 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1229 .resources = wm831x_rtc_resources,
1232 .name = "wm831x-status",
1234 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1235 .resources = wm831x_status1_resources,
1238 .name = "wm831x-status",
1240 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1241 .resources = wm831x_status2_resources,
1244 .name = "wm831x-touch",
1245 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1246 .resources = wm831x_touch_resources,
1249 .name = "wm831x-watchdog",
1250 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1251 .resources = wm831x_wdt_resources,
1255 static struct mfd_cell wm8320_devs[] = {
1257 .name = "wm831x-backup",
1260 .name = "wm831x-buckv",
1262 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1263 .resources = wm831x_dcdc1_resources,
1266 .name = "wm831x-buckv",
1268 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1269 .resources = wm831x_dcdc2_resources,
1272 .name = "wm831x-buckp",
1274 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1275 .resources = wm831x_dcdc3_resources,
1278 .name = "wm831x-buckp",
1280 .num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
1281 .resources = wm8320_dcdc4_buck_resources,
1284 .name = "wm831x-gpio",
1285 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1286 .resources = wm831x_gpio_resources,
1289 .name = "wm831x-hwmon",
1292 .name = "wm831x-ldo",
1294 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1295 .resources = wm831x_ldo1_resources,
1298 .name = "wm831x-ldo",
1300 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1301 .resources = wm831x_ldo2_resources,
1304 .name = "wm831x-ldo",
1306 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1307 .resources = wm831x_ldo3_resources,
1310 .name = "wm831x-ldo",
1312 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1313 .resources = wm831x_ldo4_resources,
1316 .name = "wm831x-ldo",
1318 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1319 .resources = wm831x_ldo5_resources,
1322 .name = "wm831x-ldo",
1324 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1325 .resources = wm831x_ldo6_resources,
1328 .name = "wm831x-aldo",
1330 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1331 .resources = wm831x_ldo7_resources,
1334 .name = "wm831x-aldo",
1336 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1337 .resources = wm831x_ldo8_resources,
1340 .name = "wm831x-aldo",
1342 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1343 .resources = wm831x_ldo9_resources,
1346 .name = "wm831x-aldo",
1348 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1349 .resources = wm831x_ldo10_resources,
1352 .name = "wm831x-alive-ldo",
1354 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1355 .resources = wm831x_ldo11_resources,
1358 .name = "wm831x-on",
1359 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1360 .resources = wm831x_on_resources,
1363 .name = "wm831x-rtc",
1364 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1365 .resources = wm831x_rtc_resources,
1368 .name = "wm831x-status",
1370 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1371 .resources = wm831x_status1_resources,
1374 .name = "wm831x-status",
1376 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1377 .resources = wm831x_status2_resources,
1380 .name = "wm831x-watchdog",
1381 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1382 .resources = wm831x_wdt_resources,
1386 static struct mfd_cell backlight_devs[] = {
1388 .name = "wm831x-backlight",
1393 * Instantiate the generic non-control parts of the device.
1395 static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
1397 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
1399 enum wm831x_parent parent;
1402 mutex_init(&wm831x->io_lock);
1403 mutex_init(&wm831x->key_lock);
1404 mutex_init(&wm831x->auxadc_lock);
1405 dev_set_drvdata(wm831x->dev, wm831x);
1407 ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1409 dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1412 if (ret != 0x6204) {
1413 dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1418 ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1420 dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1423 rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1425 ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1427 dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1431 /* Some engineering samples do not have the ID set, rely on
1432 * the device being registered correctly.
1435 dev_info(wm831x->dev, "Device is an engineering sample\n");
1442 wm831x->num_gpio = 16;
1443 dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
1448 wm831x->num_gpio = 16;
1449 dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
1454 wm831x->num_gpio = 16;
1455 dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
1460 wm831x->num_gpio = 12;
1461 dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);
1465 dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1470 /* This will need revisiting in future but is OK for all
1474 dev_warn(wm831x->dev, "Device was registered as a WM%lx\n",
1477 /* Bootstrap the user key */
1478 ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1480 dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1484 dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1486 wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1490 if (pdata && pdata->pre_init) {
1491 ret = pdata->pre_init(wm831x);
1493 dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1498 ret = wm831x_irq_init(wm831x, irq);
1502 /* The core device is up, instantiate the subdevices. */
1505 ret = mfd_add_devices(wm831x->dev, -1,
1506 wm8310_devs, ARRAY_SIZE(wm8310_devs),
1511 ret = mfd_add_devices(wm831x->dev, -1,
1512 wm8311_devs, ARRAY_SIZE(wm8311_devs),
1517 ret = mfd_add_devices(wm831x->dev, -1,
1518 wm8312_devs, ARRAY_SIZE(wm8312_devs),
1523 ret = mfd_add_devices(wm831x->dev, -1,
1524 wm8320_devs, ARRAY_SIZE(wm8320_devs),
1529 /* If this happens the bus probe function is buggy */
1534 dev_err(wm831x->dev, "Failed to add children\n");
1538 if (pdata && pdata->backlight) {
1539 /* Treat errors as non-critical */
1540 ret = mfd_add_devices(wm831x->dev, -1, backlight_devs,
1541 ARRAY_SIZE(backlight_devs), NULL, 0);
1543 dev_err(wm831x->dev, "Failed to add backlight: %d\n",
1547 wm831x_otp_init(wm831x);
1549 if (pdata && pdata->post_init) {
1550 ret = pdata->post_init(wm831x);
1552 dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1560 wm831x_irq_exit(wm831x);
1562 mfd_remove_devices(wm831x->dev);
1567 static void wm831x_device_exit(struct wm831x *wm831x)
1569 wm831x_otp_exit(wm831x);
1570 mfd_remove_devices(wm831x->dev);
1571 wm831x_irq_exit(wm831x);
1575 static int wm831x_i2c_read_device(struct wm831x *wm831x, unsigned short reg,
1576 int bytes, void *dest)
1578 struct i2c_client *i2c = wm831x->control_data;
1580 u16 r = cpu_to_be16(reg);
1582 ret = i2c_master_send(i2c, (unsigned char *)&r, 2);
1588 ret = i2c_master_recv(i2c, dest, bytes);
1596 /* Currently we allocate the write buffer on the stack; this is OK for
1597 * small writes - if we need to do large writes this will need to be
1600 static int wm831x_i2c_write_device(struct wm831x *wm831x, unsigned short reg,
1601 int bytes, void *src)
1603 struct i2c_client *i2c = wm831x->control_data;
1604 unsigned char msg[bytes + 2];
1607 reg = cpu_to_be16(reg);
1608 memcpy(&msg[0], ®, 2);
1609 memcpy(&msg[2], src, bytes);
1611 ret = i2c_master_send(i2c, msg, bytes + 2);
1614 if (ret < bytes + 2)
1620 static int wm831x_i2c_probe(struct i2c_client *i2c,
1621 const struct i2c_device_id *id)
1623 struct wm831x *wm831x;
1625 wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
1626 if (wm831x == NULL) {
1631 i2c_set_clientdata(i2c, wm831x);
1632 wm831x->dev = &i2c->dev;
1633 wm831x->control_data = i2c;
1634 wm831x->read_dev = wm831x_i2c_read_device;
1635 wm831x->write_dev = wm831x_i2c_write_device;
1637 return wm831x_device_init(wm831x, id->driver_data, i2c->irq);
1640 static int wm831x_i2c_remove(struct i2c_client *i2c)
1642 struct wm831x *wm831x = i2c_get_clientdata(i2c);
1644 wm831x_device_exit(wm831x);
1649 static const struct i2c_device_id wm831x_i2c_id[] = {
1650 { "wm8310", WM8310 },
1651 { "wm8311", WM8311 },
1652 { "wm8312", WM8312 },
1653 { "wm8320", WM8320 },
1656 MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
1659 static struct i2c_driver wm831x_i2c_driver = {
1662 .owner = THIS_MODULE,
1664 .probe = wm831x_i2c_probe,
1665 .remove = wm831x_i2c_remove,
1666 .id_table = wm831x_i2c_id,
1669 static int __init wm831x_i2c_init(void)
1673 ret = i2c_add_driver(&wm831x_i2c_driver);
1675 pr_err("Failed to register wm831x I2C driver: %d\n", ret);
1679 subsys_initcall(wm831x_i2c_init);
1681 static void __exit wm831x_i2c_exit(void)
1683 i2c_del_driver(&wm831x_i2c_driver);
1685 module_exit(wm831x_i2c_exit);
1687 MODULE_DESCRIPTION("I2C support for the WM831X AudioPlus PMIC");
1688 MODULE_LICENSE("GPL");
1689 MODULE_AUTHOR("Mark Brown");