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/bcd.h>
18 #include <linux/delay.h>
19 #include <linux/mfd/core.h>
20 #include <linux/slab.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);
92 static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg)
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:
112 * wm831x_reg_unlock: Unlock user keyed registers
114 * The WM831x has a user key preventing writes to particularly
115 * critical registers. This function locks those registers,
116 * allowing writes to them.
118 void wm831x_reg_lock(struct wm831x *wm831x)
122 ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
124 dev_vdbg(wm831x->dev, "Registers locked\n");
126 mutex_lock(&wm831x->io_lock);
127 WARN_ON(wm831x->locked);
129 mutex_unlock(&wm831x->io_lock);
131 dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret);
135 EXPORT_SYMBOL_GPL(wm831x_reg_lock);
138 * wm831x_reg_unlock: Unlock user keyed registers
140 * The WM831x has a user key preventing writes to particularly
141 * critical registers. This function locks those registers,
142 * preventing spurious writes.
144 int wm831x_reg_unlock(struct wm831x *wm831x)
148 /* 0x9716 is the value required to unlock the registers */
149 ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716);
151 dev_vdbg(wm831x->dev, "Registers unlocked\n");
153 mutex_lock(&wm831x->io_lock);
154 WARN_ON(!wm831x->locked);
156 mutex_unlock(&wm831x->io_lock);
161 EXPORT_SYMBOL_GPL(wm831x_reg_unlock);
163 static int wm831x_read(struct wm831x *wm831x, unsigned short reg,
164 int bytes, void *dest)
172 ret = wm831x->read_dev(wm831x, reg, bytes, dest);
176 for (i = 0; i < bytes / 2; i++) {
177 buf[i] = be16_to_cpu(buf[i]);
179 dev_vdbg(wm831x->dev, "Read %04x from R%d(0x%x)\n",
180 buf[i], reg + i, reg + i);
187 * wm831x_reg_read: Read a single WM831x register.
189 * @wm831x: Device to read from.
190 * @reg: Register to read.
192 int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
197 mutex_lock(&wm831x->io_lock);
199 ret = wm831x_read(wm831x, reg, 2, &val);
201 mutex_unlock(&wm831x->io_lock);
208 EXPORT_SYMBOL_GPL(wm831x_reg_read);
211 * wm831x_bulk_read: Read multiple WM831x registers
213 * @wm831x: Device to read from
214 * @reg: First register
215 * @count: Number of registers
216 * @buf: Buffer to fill.
218 int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
223 mutex_lock(&wm831x->io_lock);
225 ret = wm831x_read(wm831x, reg, count * 2, buf);
227 mutex_unlock(&wm831x->io_lock);
231 EXPORT_SYMBOL_GPL(wm831x_bulk_read);
233 static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
234 int bytes, void *src)
242 for (i = 0; i < bytes / 2; i++) {
243 if (wm831x_reg_locked(wm831x, reg))
246 dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
247 buf[i], reg + i, reg + i);
249 buf[i] = cpu_to_be16(buf[i]);
252 return wm831x->write_dev(wm831x, reg, bytes, src);
256 * wm831x_reg_write: Write a single WM831x register.
258 * @wm831x: Device to write to.
259 * @reg: Register to write to.
260 * @val: Value to write.
262 int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg,
267 mutex_lock(&wm831x->io_lock);
269 ret = wm831x_write(wm831x, reg, 2, &val);
271 mutex_unlock(&wm831x->io_lock);
275 EXPORT_SYMBOL_GPL(wm831x_reg_write);
278 * wm831x_set_bits: Set the value of a bitfield in a WM831x register
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)
285 int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
286 unsigned short mask, unsigned short val)
291 mutex_lock(&wm831x->io_lock);
293 ret = wm831x_read(wm831x, reg, 2, &r);
300 ret = wm831x_write(wm831x, reg, 2, &r);
303 mutex_unlock(&wm831x->io_lock);
307 EXPORT_SYMBOL_GPL(wm831x_set_bits);
310 * wm831x_auxadc_read: Read a value from the WM831x AUXADC
312 * @wm831x: Device to read from.
313 * @input: AUXADC input to read.
315 int wm831x_auxadc_read(struct wm831x *wm831x, enum wm831x_auxadc input)
317 int ret, src, irq_masked, timeout;
319 /* Are we using the interrupt? */
320 irq_masked = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_1_MASK);
321 irq_masked &= WM831X_AUXADC_DATA_EINT;
323 mutex_lock(&wm831x->auxadc_lock);
325 ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
326 WM831X_AUX_ENA, WM831X_AUX_ENA);
328 dev_err(wm831x->dev, "Failed to enable AUXADC: %d\n", ret);
332 /* We force a single source at present */
334 ret = wm831x_reg_write(wm831x, WM831X_AUXADC_SOURCE,
337 dev_err(wm831x->dev, "Failed to set AUXADC source: %d\n", ret);
341 /* Clear any notification from a very late arriving interrupt */
342 try_wait_for_completion(&wm831x->auxadc_done);
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);
352 /* If we're not using interrupts then poll the
353 * interrupt status register */
358 ret = wm831x_reg_read(wm831x,
359 WM831X_INTERRUPT_STATUS_1);
362 "ISR 1 read failed: %d\n", ret);
366 /* Did it complete? */
367 if (ret & WM831X_AUXADC_DATA_EINT) {
368 wm831x_reg_write(wm831x,
369 WM831X_INTERRUPT_STATUS_1,
370 WM831X_AUXADC_DATA_EINT);
374 "AUXADC conversion timeout\n");
380 /* If we are using interrupts then wait for the
381 * interrupt to complete. Use an extremely long
382 * timeout to handle situations with heavy load where
383 * the notification of the interrupt may be delayed by
384 * threaded IRQ handling. */
385 if (!wait_for_completion_timeout(&wm831x->auxadc_done,
386 msecs_to_jiffies(500))) {
387 dev_err(wm831x->dev, "Timed out waiting for AUXADC\n");
393 ret = wm831x_reg_read(wm831x, WM831X_AUXADC_DATA);
395 dev_err(wm831x->dev, "Failed to read AUXADC data: %d\n", ret);
397 src = ((ret & WM831X_AUX_DATA_SRC_MASK)
398 >> WM831X_AUX_DATA_SRC_SHIFT) - 1;
401 src = WM831X_AUX_CAL;
404 dev_err(wm831x->dev, "Data from source %d not %d\n",
408 ret &= WM831X_AUX_DATA_MASK;
413 wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, WM831X_AUX_ENA, 0);
415 mutex_unlock(&wm831x->auxadc_lock);
418 EXPORT_SYMBOL_GPL(wm831x_auxadc_read);
420 static irqreturn_t wm831x_auxadc_irq(int irq, void *irq_data)
422 struct wm831x *wm831x = irq_data;
424 complete(&wm831x->auxadc_done);
430 * wm831x_auxadc_read_uv: Read a voltage from the WM831x AUXADC
432 * @wm831x: Device to read from.
433 * @input: AUXADC input to read.
435 int wm831x_auxadc_read_uv(struct wm831x *wm831x, enum wm831x_auxadc input)
439 ret = wm831x_auxadc_read(wm831x, input);
447 EXPORT_SYMBOL_GPL(wm831x_auxadc_read_uv);
449 static struct resource wm831x_dcdc1_resources[] = {
451 .start = WM831X_DC1_CONTROL_1,
452 .end = WM831X_DC1_DVS_CONTROL,
453 .flags = IORESOURCE_IO,
457 .start = WM831X_IRQ_UV_DC1,
458 .end = WM831X_IRQ_UV_DC1,
459 .flags = IORESOURCE_IRQ,
463 .start = WM831X_IRQ_HC_DC1,
464 .end = WM831X_IRQ_HC_DC1,
465 .flags = IORESOURCE_IRQ,
470 static struct resource wm831x_dcdc2_resources[] = {
472 .start = WM831X_DC2_CONTROL_1,
473 .end = WM831X_DC2_DVS_CONTROL,
474 .flags = IORESOURCE_IO,
478 .start = WM831X_IRQ_UV_DC2,
479 .end = WM831X_IRQ_UV_DC2,
480 .flags = IORESOURCE_IRQ,
484 .start = WM831X_IRQ_HC_DC2,
485 .end = WM831X_IRQ_HC_DC2,
486 .flags = IORESOURCE_IRQ,
490 static struct resource wm831x_dcdc3_resources[] = {
492 .start = WM831X_DC3_CONTROL_1,
493 .end = WM831X_DC3_SLEEP_CONTROL,
494 .flags = IORESOURCE_IO,
498 .start = WM831X_IRQ_UV_DC3,
499 .end = WM831X_IRQ_UV_DC3,
500 .flags = IORESOURCE_IRQ,
504 static struct resource wm831x_dcdc4_resources[] = {
506 .start = WM831X_DC4_CONTROL,
507 .end = WM831X_DC4_SLEEP_CONTROL,
508 .flags = IORESOURCE_IO,
512 .start = WM831X_IRQ_UV_DC4,
513 .end = WM831X_IRQ_UV_DC4,
514 .flags = IORESOURCE_IRQ,
518 static struct resource wm8320_dcdc4_buck_resources[] = {
520 .start = WM831X_DC4_CONTROL,
521 .end = WM832X_DC4_SLEEP_CONTROL,
522 .flags = IORESOURCE_IO,
526 .start = WM831X_IRQ_UV_DC4,
527 .end = WM831X_IRQ_UV_DC4,
528 .flags = IORESOURCE_IRQ,
532 static struct resource wm831x_gpio_resources[] = {
534 .start = WM831X_IRQ_GPIO_1,
535 .end = WM831X_IRQ_GPIO_16,
536 .flags = IORESOURCE_IRQ,
540 static struct resource wm831x_isink1_resources[] = {
542 .start = WM831X_CURRENT_SINK_1,
543 .end = WM831X_CURRENT_SINK_1,
544 .flags = IORESOURCE_IO,
547 .start = WM831X_IRQ_CS1,
548 .end = WM831X_IRQ_CS1,
549 .flags = IORESOURCE_IRQ,
553 static struct resource wm831x_isink2_resources[] = {
555 .start = WM831X_CURRENT_SINK_2,
556 .end = WM831X_CURRENT_SINK_2,
557 .flags = IORESOURCE_IO,
560 .start = WM831X_IRQ_CS2,
561 .end = WM831X_IRQ_CS2,
562 .flags = IORESOURCE_IRQ,
566 static struct resource wm831x_ldo1_resources[] = {
568 .start = WM831X_LDO1_CONTROL,
569 .end = WM831X_LDO1_SLEEP_CONTROL,
570 .flags = IORESOURCE_IO,
574 .start = WM831X_IRQ_UV_LDO1,
575 .end = WM831X_IRQ_UV_LDO1,
576 .flags = IORESOURCE_IRQ,
580 static struct resource wm831x_ldo2_resources[] = {
582 .start = WM831X_LDO2_CONTROL,
583 .end = WM831X_LDO2_SLEEP_CONTROL,
584 .flags = IORESOURCE_IO,
588 .start = WM831X_IRQ_UV_LDO2,
589 .end = WM831X_IRQ_UV_LDO2,
590 .flags = IORESOURCE_IRQ,
594 static struct resource wm831x_ldo3_resources[] = {
596 .start = WM831X_LDO3_CONTROL,
597 .end = WM831X_LDO3_SLEEP_CONTROL,
598 .flags = IORESOURCE_IO,
602 .start = WM831X_IRQ_UV_LDO3,
603 .end = WM831X_IRQ_UV_LDO3,
604 .flags = IORESOURCE_IRQ,
608 static struct resource wm831x_ldo4_resources[] = {
610 .start = WM831X_LDO4_CONTROL,
611 .end = WM831X_LDO4_SLEEP_CONTROL,
612 .flags = IORESOURCE_IO,
616 .start = WM831X_IRQ_UV_LDO4,
617 .end = WM831X_IRQ_UV_LDO4,
618 .flags = IORESOURCE_IRQ,
622 static struct resource wm831x_ldo5_resources[] = {
624 .start = WM831X_LDO5_CONTROL,
625 .end = WM831X_LDO5_SLEEP_CONTROL,
626 .flags = IORESOURCE_IO,
630 .start = WM831X_IRQ_UV_LDO5,
631 .end = WM831X_IRQ_UV_LDO5,
632 .flags = IORESOURCE_IRQ,
636 static struct resource wm831x_ldo6_resources[] = {
638 .start = WM831X_LDO6_CONTROL,
639 .end = WM831X_LDO6_SLEEP_CONTROL,
640 .flags = IORESOURCE_IO,
644 .start = WM831X_IRQ_UV_LDO6,
645 .end = WM831X_IRQ_UV_LDO6,
646 .flags = IORESOURCE_IRQ,
650 static struct resource wm831x_ldo7_resources[] = {
652 .start = WM831X_LDO7_CONTROL,
653 .end = WM831X_LDO7_SLEEP_CONTROL,
654 .flags = IORESOURCE_IO,
658 .start = WM831X_IRQ_UV_LDO7,
659 .end = WM831X_IRQ_UV_LDO7,
660 .flags = IORESOURCE_IRQ,
664 static struct resource wm831x_ldo8_resources[] = {
666 .start = WM831X_LDO8_CONTROL,
667 .end = WM831X_LDO8_SLEEP_CONTROL,
668 .flags = IORESOURCE_IO,
672 .start = WM831X_IRQ_UV_LDO8,
673 .end = WM831X_IRQ_UV_LDO8,
674 .flags = IORESOURCE_IRQ,
678 static struct resource wm831x_ldo9_resources[] = {
680 .start = WM831X_LDO9_CONTROL,
681 .end = WM831X_LDO9_SLEEP_CONTROL,
682 .flags = IORESOURCE_IO,
686 .start = WM831X_IRQ_UV_LDO9,
687 .end = WM831X_IRQ_UV_LDO9,
688 .flags = IORESOURCE_IRQ,
692 static struct resource wm831x_ldo10_resources[] = {
694 .start = WM831X_LDO10_CONTROL,
695 .end = WM831X_LDO10_SLEEP_CONTROL,
696 .flags = IORESOURCE_IO,
700 .start = WM831X_IRQ_UV_LDO10,
701 .end = WM831X_IRQ_UV_LDO10,
702 .flags = IORESOURCE_IRQ,
706 static struct resource wm831x_ldo11_resources[] = {
708 .start = WM831X_LDO11_ON_CONTROL,
709 .end = WM831X_LDO11_SLEEP_CONTROL,
710 .flags = IORESOURCE_IO,
714 static struct resource wm831x_on_resources[] = {
716 .start = WM831X_IRQ_ON,
717 .end = WM831X_IRQ_ON,
718 .flags = IORESOURCE_IRQ,
723 static struct resource wm831x_power_resources[] = {
726 .start = WM831X_IRQ_PPM_SYSLO,
727 .end = WM831X_IRQ_PPM_SYSLO,
728 .flags = IORESOURCE_IRQ,
732 .start = WM831X_IRQ_PPM_PWR_SRC,
733 .end = WM831X_IRQ_PPM_PWR_SRC,
734 .flags = IORESOURCE_IRQ,
738 .start = WM831X_IRQ_PPM_USB_CURR,
739 .end = WM831X_IRQ_PPM_USB_CURR,
740 .flags = IORESOURCE_IRQ,
744 .start = WM831X_IRQ_CHG_BATT_HOT,
745 .end = WM831X_IRQ_CHG_BATT_HOT,
746 .flags = IORESOURCE_IRQ,
750 .start = WM831X_IRQ_CHG_BATT_COLD,
751 .end = WM831X_IRQ_CHG_BATT_COLD,
752 .flags = IORESOURCE_IRQ,
756 .start = WM831X_IRQ_CHG_BATT_FAIL,
757 .end = WM831X_IRQ_CHG_BATT_FAIL,
758 .flags = IORESOURCE_IRQ,
762 .start = WM831X_IRQ_CHG_OV,
763 .end = WM831X_IRQ_CHG_OV,
764 .flags = IORESOURCE_IRQ,
768 .start = WM831X_IRQ_CHG_END,
769 .end = WM831X_IRQ_CHG_END,
770 .flags = IORESOURCE_IRQ,
774 .start = WM831X_IRQ_CHG_TO,
775 .end = WM831X_IRQ_CHG_TO,
776 .flags = IORESOURCE_IRQ,
780 .start = WM831X_IRQ_CHG_MODE,
781 .end = WM831X_IRQ_CHG_MODE,
782 .flags = IORESOURCE_IRQ,
786 .start = WM831X_IRQ_CHG_START,
787 .end = WM831X_IRQ_CHG_START,
788 .flags = IORESOURCE_IRQ,
792 static struct resource wm831x_rtc_resources[] = {
795 .start = WM831X_IRQ_RTC_PER,
796 .end = WM831X_IRQ_RTC_PER,
797 .flags = IORESOURCE_IRQ,
801 .start = WM831X_IRQ_RTC_ALM,
802 .end = WM831X_IRQ_RTC_ALM,
803 .flags = IORESOURCE_IRQ,
807 static struct resource wm831x_status1_resources[] = {
809 .start = WM831X_STATUS_LED_1,
810 .end = WM831X_STATUS_LED_1,
811 .flags = IORESOURCE_IO,
815 static struct resource wm831x_status2_resources[] = {
817 .start = WM831X_STATUS_LED_2,
818 .end = WM831X_STATUS_LED_2,
819 .flags = IORESOURCE_IO,
823 static struct resource wm831x_touch_resources[] = {
826 .start = WM831X_IRQ_TCHPD,
827 .end = WM831X_IRQ_TCHPD,
828 .flags = IORESOURCE_IRQ,
832 .start = WM831X_IRQ_TCHDATA,
833 .end = WM831X_IRQ_TCHDATA,
834 .flags = IORESOURCE_IRQ,
838 static struct resource wm831x_wdt_resources[] = {
840 .start = WM831X_IRQ_WDOG_TO,
841 .end = WM831X_IRQ_WDOG_TO,
842 .flags = IORESOURCE_IRQ,
846 static struct mfd_cell wm8310_devs[] = {
848 .name = "wm831x-backup",
851 .name = "wm831x-buckv",
853 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
854 .resources = wm831x_dcdc1_resources,
857 .name = "wm831x-buckv",
859 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
860 .resources = wm831x_dcdc2_resources,
863 .name = "wm831x-buckp",
865 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
866 .resources = wm831x_dcdc3_resources,
869 .name = "wm831x-boostp",
871 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
872 .resources = wm831x_dcdc4_resources,
875 .name = "wm831x-epe",
879 .name = "wm831x-epe",
883 .name = "wm831x-gpio",
884 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
885 .resources = wm831x_gpio_resources,
888 .name = "wm831x-hwmon",
891 .name = "wm831x-isink",
893 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
894 .resources = wm831x_isink1_resources,
897 .name = "wm831x-isink",
899 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
900 .resources = wm831x_isink2_resources,
903 .name = "wm831x-ldo",
905 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
906 .resources = wm831x_ldo1_resources,
909 .name = "wm831x-ldo",
911 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
912 .resources = wm831x_ldo2_resources,
915 .name = "wm831x-ldo",
917 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
918 .resources = wm831x_ldo3_resources,
921 .name = "wm831x-ldo",
923 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
924 .resources = wm831x_ldo4_resources,
927 .name = "wm831x-ldo",
929 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
930 .resources = wm831x_ldo5_resources,
933 .name = "wm831x-ldo",
935 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
936 .resources = wm831x_ldo6_resources,
939 .name = "wm831x-aldo",
941 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
942 .resources = wm831x_ldo7_resources,
945 .name = "wm831x-aldo",
947 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
948 .resources = wm831x_ldo8_resources,
951 .name = "wm831x-aldo",
953 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
954 .resources = wm831x_ldo9_resources,
957 .name = "wm831x-aldo",
959 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
960 .resources = wm831x_ldo10_resources,
963 .name = "wm831x-alive-ldo",
965 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
966 .resources = wm831x_ldo11_resources,
970 .num_resources = ARRAY_SIZE(wm831x_on_resources),
971 .resources = wm831x_on_resources,
974 .name = "wm831x-power",
975 .num_resources = ARRAY_SIZE(wm831x_power_resources),
976 .resources = wm831x_power_resources,
979 .name = "wm831x-status",
981 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
982 .resources = wm831x_status1_resources,
985 .name = "wm831x-status",
987 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
988 .resources = wm831x_status2_resources,
991 .name = "wm831x-watchdog",
992 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
993 .resources = wm831x_wdt_resources,
997 static struct mfd_cell wm8311_devs[] = {
999 .name = "wm831x-backup",
1002 .name = "wm831x-buckv",
1004 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1005 .resources = wm831x_dcdc1_resources,
1008 .name = "wm831x-buckv",
1010 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1011 .resources = wm831x_dcdc2_resources,
1014 .name = "wm831x-buckp",
1016 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1017 .resources = wm831x_dcdc3_resources,
1020 .name = "wm831x-boostp",
1022 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1023 .resources = wm831x_dcdc4_resources,
1026 .name = "wm831x-epe",
1030 .name = "wm831x-epe",
1034 .name = "wm831x-gpio",
1035 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1036 .resources = wm831x_gpio_resources,
1039 .name = "wm831x-hwmon",
1042 .name = "wm831x-isink",
1044 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1045 .resources = wm831x_isink1_resources,
1048 .name = "wm831x-isink",
1050 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1051 .resources = wm831x_isink2_resources,
1054 .name = "wm831x-ldo",
1056 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1057 .resources = wm831x_ldo1_resources,
1060 .name = "wm831x-ldo",
1062 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1063 .resources = wm831x_ldo2_resources,
1066 .name = "wm831x-ldo",
1068 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1069 .resources = wm831x_ldo3_resources,
1072 .name = "wm831x-ldo",
1074 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1075 .resources = wm831x_ldo4_resources,
1078 .name = "wm831x-ldo",
1080 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1081 .resources = wm831x_ldo5_resources,
1084 .name = "wm831x-aldo",
1086 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1087 .resources = wm831x_ldo7_resources,
1090 .name = "wm831x-alive-ldo",
1092 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1093 .resources = wm831x_ldo11_resources,
1096 .name = "wm831x-on",
1097 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1098 .resources = wm831x_on_resources,
1101 .name = "wm831x-power",
1102 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1103 .resources = wm831x_power_resources,
1106 .name = "wm831x-status",
1108 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1109 .resources = wm831x_status1_resources,
1112 .name = "wm831x-status",
1114 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1115 .resources = wm831x_status2_resources,
1118 .name = "wm831x-watchdog",
1119 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1120 .resources = wm831x_wdt_resources,
1124 static struct mfd_cell wm8312_devs[] = {
1126 .name = "wm831x-backup",
1129 .name = "wm831x-buckv",
1131 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1132 .resources = wm831x_dcdc1_resources,
1135 .name = "wm831x-buckv",
1137 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1138 .resources = wm831x_dcdc2_resources,
1141 .name = "wm831x-buckp",
1143 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1144 .resources = wm831x_dcdc3_resources,
1147 .name = "wm831x-boostp",
1149 .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
1150 .resources = wm831x_dcdc4_resources,
1153 .name = "wm831x-epe",
1157 .name = "wm831x-epe",
1161 .name = "wm831x-gpio",
1162 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1163 .resources = wm831x_gpio_resources,
1166 .name = "wm831x-hwmon",
1169 .name = "wm831x-isink",
1171 .num_resources = ARRAY_SIZE(wm831x_isink1_resources),
1172 .resources = wm831x_isink1_resources,
1175 .name = "wm831x-isink",
1177 .num_resources = ARRAY_SIZE(wm831x_isink2_resources),
1178 .resources = wm831x_isink2_resources,
1181 .name = "wm831x-ldo",
1183 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1184 .resources = wm831x_ldo1_resources,
1187 .name = "wm831x-ldo",
1189 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1190 .resources = wm831x_ldo2_resources,
1193 .name = "wm831x-ldo",
1195 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1196 .resources = wm831x_ldo3_resources,
1199 .name = "wm831x-ldo",
1201 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1202 .resources = wm831x_ldo4_resources,
1205 .name = "wm831x-ldo",
1207 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1208 .resources = wm831x_ldo5_resources,
1211 .name = "wm831x-ldo",
1213 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1214 .resources = wm831x_ldo6_resources,
1217 .name = "wm831x-aldo",
1219 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1220 .resources = wm831x_ldo7_resources,
1223 .name = "wm831x-aldo",
1225 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1226 .resources = wm831x_ldo8_resources,
1229 .name = "wm831x-aldo",
1231 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1232 .resources = wm831x_ldo9_resources,
1235 .name = "wm831x-aldo",
1237 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1238 .resources = wm831x_ldo10_resources,
1241 .name = "wm831x-alive-ldo",
1243 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1244 .resources = wm831x_ldo11_resources,
1247 .name = "wm831x-on",
1248 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1249 .resources = wm831x_on_resources,
1252 .name = "wm831x-power",
1253 .num_resources = ARRAY_SIZE(wm831x_power_resources),
1254 .resources = wm831x_power_resources,
1257 .name = "wm831x-status",
1259 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1260 .resources = wm831x_status1_resources,
1263 .name = "wm831x-status",
1265 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1266 .resources = wm831x_status2_resources,
1269 .name = "wm831x-watchdog",
1270 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1271 .resources = wm831x_wdt_resources,
1275 static struct mfd_cell wm8320_devs[] = {
1277 .name = "wm831x-backup",
1280 .name = "wm831x-buckv",
1282 .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
1283 .resources = wm831x_dcdc1_resources,
1286 .name = "wm831x-buckv",
1288 .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
1289 .resources = wm831x_dcdc2_resources,
1292 .name = "wm831x-buckp",
1294 .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
1295 .resources = wm831x_dcdc3_resources,
1298 .name = "wm831x-buckp",
1300 .num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
1301 .resources = wm8320_dcdc4_buck_resources,
1304 .name = "wm831x-gpio",
1305 .num_resources = ARRAY_SIZE(wm831x_gpio_resources),
1306 .resources = wm831x_gpio_resources,
1309 .name = "wm831x-hwmon",
1312 .name = "wm831x-ldo",
1314 .num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
1315 .resources = wm831x_ldo1_resources,
1318 .name = "wm831x-ldo",
1320 .num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
1321 .resources = wm831x_ldo2_resources,
1324 .name = "wm831x-ldo",
1326 .num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
1327 .resources = wm831x_ldo3_resources,
1330 .name = "wm831x-ldo",
1332 .num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
1333 .resources = wm831x_ldo4_resources,
1336 .name = "wm831x-ldo",
1338 .num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
1339 .resources = wm831x_ldo5_resources,
1342 .name = "wm831x-ldo",
1344 .num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
1345 .resources = wm831x_ldo6_resources,
1348 .name = "wm831x-aldo",
1350 .num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
1351 .resources = wm831x_ldo7_resources,
1354 .name = "wm831x-aldo",
1356 .num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
1357 .resources = wm831x_ldo8_resources,
1360 .name = "wm831x-aldo",
1362 .num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
1363 .resources = wm831x_ldo9_resources,
1366 .name = "wm831x-aldo",
1368 .num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
1369 .resources = wm831x_ldo10_resources,
1372 .name = "wm831x-alive-ldo",
1374 .num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
1375 .resources = wm831x_ldo11_resources,
1378 .name = "wm831x-on",
1379 .num_resources = ARRAY_SIZE(wm831x_on_resources),
1380 .resources = wm831x_on_resources,
1383 .name = "wm831x-status",
1385 .num_resources = ARRAY_SIZE(wm831x_status1_resources),
1386 .resources = wm831x_status1_resources,
1389 .name = "wm831x-status",
1391 .num_resources = ARRAY_SIZE(wm831x_status2_resources),
1392 .resources = wm831x_status2_resources,
1395 .name = "wm831x-watchdog",
1396 .num_resources = ARRAY_SIZE(wm831x_wdt_resources),
1397 .resources = wm831x_wdt_resources,
1401 static struct mfd_cell touch_devs[] = {
1403 .name = "wm831x-touch",
1404 .num_resources = ARRAY_SIZE(wm831x_touch_resources),
1405 .resources = wm831x_touch_resources,
1409 static struct mfd_cell rtc_devs[] = {
1411 .name = "wm831x-rtc",
1412 .num_resources = ARRAY_SIZE(wm831x_rtc_resources),
1413 .resources = wm831x_rtc_resources,
1417 static struct mfd_cell backlight_devs[] = {
1419 .name = "wm831x-backlight",
1424 * Instantiate the generic non-control parts of the device.
1426 int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
1428 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
1429 int rev, wm831x_num;
1430 enum wm831x_parent parent;
1433 mutex_init(&wm831x->io_lock);
1434 mutex_init(&wm831x->key_lock);
1435 mutex_init(&wm831x->auxadc_lock);
1436 init_completion(&wm831x->auxadc_done);
1437 dev_set_drvdata(wm831x->dev, wm831x);
1439 ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
1441 dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
1449 dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
1454 ret = wm831x_reg_read(wm831x, WM831X_REVISION);
1456 dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
1459 rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
1461 ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
1463 dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
1467 /* Some engineering samples do not have the ID set, rely on
1468 * the device being registered correctly.
1471 dev_info(wm831x->dev, "Device is an engineering sample\n");
1478 wm831x->num_gpio = 16;
1479 wm831x->charger_irq_wake = 1;
1481 wm831x->has_gpio_ena = 1;
1482 wm831x->has_cs_sts = 1;
1485 dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
1490 wm831x->num_gpio = 16;
1491 wm831x->charger_irq_wake = 1;
1493 wm831x->has_gpio_ena = 1;
1494 wm831x->has_cs_sts = 1;
1497 dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
1502 wm831x->num_gpio = 16;
1503 wm831x->charger_irq_wake = 1;
1505 wm831x->has_gpio_ena = 1;
1506 wm831x->has_cs_sts = 1;
1509 dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
1514 wm831x->num_gpio = 12;
1515 dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);
1520 wm831x->num_gpio = 12;
1521 dev_info(wm831x->dev, "WM8321 revision %c\n", 'A' + rev);
1526 wm831x->num_gpio = 12;
1527 dev_info(wm831x->dev, "WM8325 revision %c\n", 'A' + rev);
1532 wm831x->num_gpio = 12;
1533 dev_info(wm831x->dev, "WM8326 revision %c\n", 'A' + rev);
1537 dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
1542 /* This will need revisiting in future but is OK for all
1546 dev_warn(wm831x->dev, "Device was registered as a WM%lx\n",
1549 /* Bootstrap the user key */
1550 ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
1552 dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
1556 dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
1558 wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
1562 if (pdata && pdata->pre_init) {
1563 ret = pdata->pre_init(wm831x);
1565 dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
1571 for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
1572 if (!pdata->gpio_defaults[i])
1575 wm831x_reg_write(wm831x,
1576 WM831X_GPIO1_CONTROL + i,
1577 pdata->gpio_defaults[i] & 0xffff);
1581 /* Multiply by 10 as we have many subdevices of the same type */
1582 if (pdata && pdata->wm831x_num)
1583 wm831x_num = pdata->wm831x_num * 10;
1587 ret = wm831x_irq_init(wm831x, irq);
1591 if (wm831x->irq_base) {
1592 ret = request_threaded_irq(wm831x->irq_base +
1593 WM831X_IRQ_AUXADC_DATA,
1594 NULL, wm831x_auxadc_irq, 0,
1597 dev_err(wm831x->dev, "AUXADC IRQ request failed: %d\n",
1601 /* The core device is up, instantiate the subdevices. */
1604 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1605 wm8310_devs, ARRAY_SIZE(wm8310_devs),
1606 NULL, wm831x->irq_base);
1610 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1611 wm8311_devs, ARRAY_SIZE(wm8311_devs),
1612 NULL, wm831x->irq_base);
1613 if (!pdata || !pdata->disable_touch)
1614 mfd_add_devices(wm831x->dev, wm831x_num,
1615 touch_devs, ARRAY_SIZE(touch_devs),
1616 NULL, wm831x->irq_base);
1620 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1621 wm8312_devs, ARRAY_SIZE(wm8312_devs),
1622 NULL, wm831x->irq_base);
1623 if (!pdata || !pdata->disable_touch)
1624 mfd_add_devices(wm831x->dev, wm831x_num,
1625 touch_devs, ARRAY_SIZE(touch_devs),
1626 NULL, wm831x->irq_base);
1633 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1634 wm8320_devs, ARRAY_SIZE(wm8320_devs),
1635 NULL, wm831x->irq_base);
1639 /* If this happens the bus probe function is buggy */
1644 dev_err(wm831x->dev, "Failed to add children\n");
1648 /* The RTC can only be used if the 32.768kHz crystal is
1649 * enabled; this can't be controlled by software at runtime.
1651 ret = wm831x_reg_read(wm831x, WM831X_CLOCK_CONTROL_2);
1653 dev_err(wm831x->dev, "Failed to read clock status: %d\n", ret);
1657 if (ret & WM831X_XTAL_ENA) {
1658 ret = mfd_add_devices(wm831x->dev, wm831x_num,
1659 rtc_devs, ARRAY_SIZE(rtc_devs),
1660 NULL, wm831x->irq_base);
1662 dev_err(wm831x->dev, "Failed to add RTC: %d\n", ret);
1666 dev_info(wm831x->dev, "32.768kHz clock disabled, no RTC\n");
1669 if (pdata && pdata->backlight) {
1670 /* Treat errors as non-critical */
1671 ret = mfd_add_devices(wm831x->dev, wm831x_num, backlight_devs,
1672 ARRAY_SIZE(backlight_devs), NULL,
1675 dev_err(wm831x->dev, "Failed to add backlight: %d\n",
1679 wm831x_otp_init(wm831x);
1681 if (pdata && pdata->post_init) {
1682 ret = pdata->post_init(wm831x);
1684 dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
1692 wm831x_irq_exit(wm831x);
1694 mfd_remove_devices(wm831x->dev);
1699 void wm831x_device_exit(struct wm831x *wm831x)
1701 wm831x_otp_exit(wm831x);
1702 mfd_remove_devices(wm831x->dev);
1703 if (wm831x->irq_base)
1704 free_irq(wm831x->irq_base + WM831X_IRQ_AUXADC_DATA, wm831x);
1705 wm831x_irq_exit(wm831x);
1709 int wm831x_device_suspend(struct wm831x *wm831x)
1713 /* If the charger IRQs are a wake source then make sure we ack
1714 * them even if they're not actively being used (eg, no power
1715 * driver or no IRQ line wired up) then acknowledge the
1716 * interrupts otherwise suspend won't last very long.
1718 if (wm831x->charger_irq_wake) {
1719 reg = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_2_MASK);
1721 mask = WM831X_CHG_BATT_HOT_EINT |
1722 WM831X_CHG_BATT_COLD_EINT |
1723 WM831X_CHG_BATT_FAIL_EINT |
1724 WM831X_CHG_OV_EINT | WM831X_CHG_END_EINT |
1725 WM831X_CHG_TO_EINT | WM831X_CHG_MODE_EINT |
1726 WM831X_CHG_START_EINT;
1728 /* If any of the interrupts are masked read the statuses */
1730 reg = wm831x_reg_read(wm831x,
1731 WM831X_INTERRUPT_STATUS_2);
1734 dev_info(wm831x->dev,
1735 "Acknowledging masked charger IRQs: %x\n",
1737 wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_2,
1745 MODULE_DESCRIPTION("Core support for the WM831X AudioPlus PMIC");
1746 MODULE_LICENSE("GPL");
1747 MODULE_AUTHOR("Mark Brown");