wm8350-irq.c

/*
 * wm8350-irq.c  --  IRQ support for Wolfson WM8350
 *
 * Copyright 2007, 2008, 2009 Wolfson Microelectronics PLC.
 *
 * Author: Liam Girdwood, Mark Brown
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/bug.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>

#include <linux/mfd/wm8350/core.h>
#include <linux/mfd/wm8350/audio.h>
#include <linux/mfd/wm8350/comparator.h>
#include <linux/mfd/wm8350/gpio.h>
#include <linux/mfd/wm8350/pmic.h>
#include <linux/mfd/wm8350/rtc.h>
#include <linux/mfd/wm8350/supply.h>
#include <linux/mfd/wm8350/wdt.h>

static void wm8350_irq_call_handler(struct wm8350 *wm8350, int irq)
{
	mutex_lock(&wm8350->irq_mutex);

	if (wm8350->irq[irq].handler)
		wm8350->irq[irq].handler(wm8350, irq, wm8350->irq[irq].data);
	else {
		dev_err(wm8350->dev, "irq %d nobody cared. now masked.\n",
			irq);
		wm8350_mask_irq(wm8350, irq);
	}

	mutex_unlock(&wm8350->irq_mutex);
}

/*
 * This is a threaded IRQ handler so can access I2C/SPI.  Since all
 * interrupts are clear on read the IRQ line will be reasserted and
 * the physical IRQ will be handled again if another interrupt is
 * asserted while we run - in the normal course of events this is a
 * rare occurrence so we save I2C/SPI reads.
 */
static irqreturn_t wm8350_irq(int irq, void *data)
{
	struct wm8350 *wm8350 = data;
	u16 level_one, status1, status2, comp;

	/* TODO: Use block reads to improve performance? */
	level_one = wm8350_reg_read(wm8350, WM8350_SYSTEM_INTERRUPTS)
		& ~wm8350_reg_read(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK);
	status1 = wm8350_reg_read(wm8350, WM8350_INT_STATUS_1)
		& ~wm8350_reg_read(wm8350, WM8350_INT_STATUS_1_MASK);
	status2 = wm8350_reg_read(wm8350, WM8350_INT_STATUS_2)
		& ~wm8350_reg_read(wm8350, WM8350_INT_STATUS_2_MASK);
	comp = wm8350_reg_read(wm8350, WM8350_COMPARATOR_INT_STATUS)
		& ~wm8350_reg_read(wm8350, WM8350_COMPARATOR_INT_STATUS_MASK);

	/* over current */
	if (level_one & WM8350_OC_INT) {
		u16 oc;

		oc = wm8350_reg_read(wm8350, WM8350_OVER_CURRENT_INT_STATUS);
		oc &= ~wm8350_reg_read(wm8350,
				       WM8350_OVER_CURRENT_INT_STATUS_MASK);

		if (oc & WM8350_OC_LS_EINT)	/* limit switch */
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_OC_LS);
	}

	/* under voltage */
	if (level_one & WM8350_UV_INT) {
		u16 uv;

		uv = wm8350_reg_read(wm8350, WM8350_UNDER_VOLTAGE_INT_STATUS);
		uv &= ~wm8350_reg_read(wm8350,
				       WM8350_UNDER_VOLTAGE_INT_STATUS_MASK);

		if (uv & WM8350_UV_DC1_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_UV_DC1);
		if (uv & WM8350_UV_DC2_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_UV_DC2);
		if (uv & WM8350_UV_DC3_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_UV_DC3);
		if (uv & WM8350_UV_DC4_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_UV_DC4);
		if (uv & WM8350_UV_DC5_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_UV_DC5);
		if (uv & WM8350_UV_DC6_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_UV_DC6);
		if (uv & WM8350_UV_LDO1_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_UV_LDO1);
		if (uv & WM8350_UV_LDO2_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_UV_LDO2);
		if (uv & WM8350_UV_LDO3_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_UV_LDO3);
		if (uv & WM8350_UV_LDO4_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_UV_LDO4);
	}

	/* charger, RTC */
	if (status1) {
		if (status1 & WM8350_CHG_BAT_HOT_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_CHG_BAT_HOT);
		if (status1 & WM8350_CHG_BAT_COLD_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_CHG_BAT_COLD);
		if (status1 & WM8350_CHG_BAT_FAIL_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_CHG_BAT_FAIL);
		if (status1 & WM8350_CHG_TO_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_CHG_TO);
		if (status1 & WM8350_CHG_END_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_CHG_END);
		if (status1 & WM8350_CHG_START_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_CHG_START);
		if (status1 & WM8350_CHG_FAST_RDY_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_CHG_FAST_RDY);
		if (status1 & WM8350_CHG_VBATT_LT_3P9_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_CHG_VBATT_LT_3P9);
		if (status1 & WM8350_CHG_VBATT_LT_3P1_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_CHG_VBATT_LT_3P1);
		if (status1 & WM8350_CHG_VBATT_LT_2P85_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_CHG_VBATT_LT_2P85);
		if (status1 & WM8350_RTC_ALM_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_RTC_ALM);
		if (status1 & WM8350_RTC_SEC_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_RTC_SEC);
		if (status1 & WM8350_RTC_PER_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_RTC_PER);
	}

	/* current sink, system, aux adc */
	if (status2) {
		if (status2 & WM8350_CS1_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_CS1);
		if (status2 & WM8350_CS2_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_CS2);

		if (status2 & WM8350_SYS_HYST_COMP_FAIL_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_SYS_HYST_COMP_FAIL);
		if (status2 & WM8350_SYS_CHIP_GT115_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_SYS_CHIP_GT115);
		if (status2 & WM8350_SYS_CHIP_GT140_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_SYS_CHIP_GT140);
		if (status2 & WM8350_SYS_WDOG_TO_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_SYS_WDOG_TO);

		if (status2 & WM8350_AUXADC_DATARDY_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_AUXADC_DATARDY);
		if (status2 & WM8350_AUXADC_DCOMP4_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_AUXADC_DCOMP4);
		if (status2 & WM8350_AUXADC_DCOMP3_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_AUXADC_DCOMP3);
		if (status2 & WM8350_AUXADC_DCOMP2_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_AUXADC_DCOMP2);
		if (status2 & WM8350_AUXADC_DCOMP1_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_AUXADC_DCOMP1);

		if (status2 & WM8350_USB_LIMIT_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_USB_LIMIT);
	}

	/* wake, codec, ext */
	if (comp) {
		if (comp & WM8350_WKUP_OFF_STATE_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_WKUP_OFF_STATE);
		if (comp & WM8350_WKUP_HIB_STATE_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_WKUP_HIB_STATE);
		if (comp & WM8350_WKUP_CONV_FAULT_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_WKUP_CONV_FAULT);
		if (comp & WM8350_WKUP_WDOG_RST_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_WKUP_WDOG_RST);
		if (comp & WM8350_WKUP_GP_PWR_ON_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_WKUP_GP_PWR_ON);
		if (comp & WM8350_WKUP_ONKEY_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_WKUP_ONKEY);
		if (comp & WM8350_WKUP_GP_WAKEUP_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_WKUP_GP_WAKEUP);

		if (comp & WM8350_CODEC_JCK_DET_L_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_CODEC_JCK_DET_L);
		if (comp & WM8350_CODEC_JCK_DET_R_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_CODEC_JCK_DET_R);
		if (comp & WM8350_CODEC_MICSCD_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_CODEC_MICSCD);
		if (comp & WM8350_CODEC_MICD_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_CODEC_MICD);

		if (comp & WM8350_EXT_USB_FB_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_EXT_USB_FB);
		if (comp & WM8350_EXT_WALL_FB_EINT)
			wm8350_irq_call_handler(wm8350,
						WM8350_IRQ_EXT_WALL_FB);
		if (comp & WM8350_EXT_BAT_FB_EINT)
			wm8350_irq_call_handler(wm8350, WM8350_IRQ_EXT_BAT_FB);
	}

	if (level_one & WM8350_GP_INT) {
		int i;
		u16 gpio;

		gpio = wm8350_reg_read(wm8350, WM8350_GPIO_INT_STATUS);
		gpio &= ~wm8350_reg_read(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK);

		for (i = 0; i < 12; i++) {
			if (gpio & (1 << i))
				wm8350_irq_call_handler(wm8350,
							WM8350_IRQ_GPIO(i));
		}
	}

	return IRQ_HANDLED;
}

int wm8350_register_irq(struct wm8350 *wm8350, int irq,
			void (*handler) (struct wm8350 *, int, void *),
			void *data)
{
	if (irq < 0 || irq > WM8350_NUM_IRQ || !handler)
		return -EINVAL;

	if (wm8350->irq[irq].handler)
		return -EBUSY;

	mutex_lock(&wm8350->irq_mutex);
	wm8350->irq[irq].handler = handler;
	wm8350->irq[irq].data = data;
	mutex_unlock(&wm8350->irq_mutex);

	return 0;
}
EXPORT_SYMBOL_GPL(wm8350_register_irq);

int wm8350_free_irq(struct wm8350 *wm8350, int irq)
{
	if (irq < 0 || irq > WM8350_NUM_IRQ)
		return -EINVAL;

	mutex_lock(&wm8350->irq_mutex);
	wm8350->irq[irq].handler = NULL;
	mutex_unlock(&wm8350->irq_mutex);
	return 0;
}
EXPORT_SYMBOL_GPL(wm8350_free_irq);

int wm8350_mask_irq(struct wm8350 *wm8350, int irq)
{
	switch (irq) {
	case WM8350_IRQ_CHG_BAT_HOT:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_CHG_BAT_HOT_EINT);
	case WM8350_IRQ_CHG_BAT_COLD:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_CHG_BAT_COLD_EINT);
	case WM8350_IRQ_CHG_BAT_FAIL:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_CHG_BAT_FAIL_EINT);
	case WM8350_IRQ_CHG_TO:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_CHG_TO_EINT);
	case WM8350_IRQ_CHG_END:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_CHG_END_EINT);
	case WM8350_IRQ_CHG_START:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_CHG_START_EINT);
	case WM8350_IRQ_CHG_FAST_RDY:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_CHG_FAST_RDY_EINT);
	case WM8350_IRQ_RTC_PER:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_RTC_PER_EINT);
	case WM8350_IRQ_RTC_SEC:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_RTC_SEC_EINT);
	case WM8350_IRQ_RTC_ALM:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_RTC_ALM_EINT);
	case WM8350_IRQ_CHG_VBATT_LT_3P9:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_CHG_VBATT_LT_3P9_EINT);
	case WM8350_IRQ_CHG_VBATT_LT_3P1:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_CHG_VBATT_LT_3P1_EINT);
	case WM8350_IRQ_CHG_VBATT_LT_2P85:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK,
				       WM8350_IM_CHG_VBATT_LT_2P85_EINT);
	case WM8350_IRQ_CS1:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_2_MASK,
				       WM8350_IM_CS1_EINT);
	case WM8350_IRQ_CS2:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_2_MASK,
				       WM8350_IM_CS2_EINT);
	case WM8350_IRQ_USB_LIMIT:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_2_MASK,
				       WM8350_IM_USB_LIMIT_EINT);
	case WM8350_IRQ_AUXADC_DATARDY:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_2_MASK,
				       WM8350_IM_AUXADC_DATARDY_EINT);
	case WM8350_IRQ_AUXADC_DCOMP4:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_2_MASK,
				       WM8350_IM_AUXADC_DCOMP4_EINT);
	case WM8350_IRQ_AUXADC_DCOMP3:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_2_MASK,
				       WM8350_IM_AUXADC_DCOMP3_EINT);
	case WM8350_IRQ_AUXADC_DCOMP2:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_2_MASK,
				       WM8350_IM_AUXADC_DCOMP2_EINT);
	case WM8350_IRQ_AUXADC_DCOMP1:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_2_MASK,
				       WM8350_IM_AUXADC_DCOMP1_EINT);
	case WM8350_IRQ_SYS_HYST_COMP_FAIL:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_2_MASK,
				       WM8350_IM_SYS_HYST_COMP_FAIL_EINT);
	case WM8350_IRQ_SYS_CHIP_GT115:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_2_MASK,
				       WM8350_IM_SYS_CHIP_GT115_EINT);
	case WM8350_IRQ_SYS_CHIP_GT140:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_2_MASK,
				       WM8350_IM_SYS_CHIP_GT140_EINT);
	case WM8350_IRQ_SYS_WDOG_TO:
		return wm8350_set_bits(wm8350, WM8350_INT_STATUS_2_MASK,
				       WM8350_IM_SYS_WDOG_TO_EINT);
	case WM8350_IRQ_UV_LDO4:
		return wm8350_set_bits(wm8350,
				       WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
				       WM8350_IM_UV_LDO4_EINT);
	case WM8350_IRQ_UV_LDO3:
		return wm8350_set_bits(wm8350,
				       WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
				       WM8350_IM_UV_LDO3_EINT);
	case WM8350_IRQ_UV_LDO2:
		return wm8350_set_bits(wm8350,
				       WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
				       WM8350_IM_UV_LDO2_EINT);
	case WM8350_IRQ_UV_LDO1:
		return wm8350_set_bits(wm8350,
				       WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
				       WM8350_IM_UV_LDO1_EINT);
	case WM8350_IRQ_UV_DC6:
		return wm8350_set_bits(wm8350,
				       WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
				       WM8350_IM_UV_DC6_EINT);
	case WM8350_IRQ_UV_DC5:
		return wm8350_set_bits(wm8350,
				       WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
				       WM8350_IM_UV_DC5_EINT);
	case WM8350_IRQ_UV_DC4:
		return wm8350_set_bits(wm8350,
				       WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
				       WM8350_IM_UV_DC4_EINT);
	case WM8350_IRQ_UV_DC3:
		return wm8350_set_bits(wm8350,
				       WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
				       WM8350_IM_UV_DC3_EINT);
	case WM8350_IRQ_UV_DC2:
		return wm8350_set_bits(wm8350,
				       WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
				       WM8350_IM_UV_DC2_EINT);
	case WM8350_IRQ_UV_DC1:
		return wm8350_set_bits(wm8350,
				       WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
				       WM8350_IM_UV_DC1_EINT);
	case WM8350_IRQ_OC_LS:
		return wm8350_set_bits(wm8350,
				       WM8350_OVER_CURRENT_INT_STATUS_MASK,
				       WM8350_IM_OC_LS_EINT);
	case WM8350_IRQ_EXT_USB_FB:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_EXT_USB_FB_EINT);
	case WM8350_IRQ_EXT_WALL_FB:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_EXT_WALL_FB_EINT);
	case WM8350_IRQ_EXT_BAT_FB:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_EXT_BAT_FB_EINT);
	case WM8350_IRQ_CODEC_JCK_DET_L:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_CODEC_JCK_DET_L_EINT);
	case WM8350_IRQ_CODEC_JCK_DET_R:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_CODEC_JCK_DET_R_EINT);
	case WM8350_IRQ_CODEC_MICSCD:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_CODEC_MICSCD_EINT);
	case WM8350_IRQ_CODEC_MICD:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_CODEC_MICD_EINT);
	case WM8350_IRQ_WKUP_OFF_STATE:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_WKUP_OFF_STATE_EINT);
	case WM8350_IRQ_WKUP_HIB_STATE:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_WKUP_HIB_STATE_EINT);
	case WM8350_IRQ_WKUP_CONV_FAULT:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_WKUP_CONV_FAULT_EINT);
	case WM8350_IRQ_WKUP_WDOG_RST:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_WKUP_OFF_STATE_EINT);
	case WM8350_IRQ_WKUP_GP_PWR_ON:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_WKUP_GP_PWR_ON_EINT);
	case WM8350_IRQ_WKUP_ONKEY:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_WKUP_ONKEY_EINT);
	case WM8350_IRQ_WKUP_GP_WAKEUP:
		return wm8350_set_bits(wm8350,
				       WM8350_COMPARATOR_INT_STATUS_MASK,
				       WM8350_IM_WKUP_GP_WAKEUP_EINT);
	case WM8350_IRQ_GPIO(0):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP0_EINT);
	case WM8350_IRQ_GPIO(1):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP1_EINT);
	case WM8350_IRQ_GPIO(2):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP2_EINT);
	case WM8350_IRQ_GPIO(3):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP3_EINT);
	case WM8350_IRQ_GPIO(4):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP4_EINT);
	case WM8350_IRQ_GPIO(5):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP5_EINT);
	case WM8350_IRQ_GPIO(6):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP6_EINT);
	case WM8350_IRQ_GPIO(7):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP7_EINT);
	case WM8350_IRQ_GPIO(8):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP8_EINT);
	case WM8350_IRQ_GPIO(9):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP9_EINT);
	case WM8350_IRQ_GPIO(10):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP10_EINT);
	case WM8350_IRQ_GPIO(11):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP11_EINT);
	case WM8350_IRQ_GPIO(12):
		return wm8350_set_bits(wm8350,
				       WM8350_GPIO_INT_STATUS_MASK,
				       WM8350_IM_GP12_EINT);
	default:
		dev_warn(wm8350->dev, "Attempting to mask unknown IRQ %d\n",
			 irq);
		return -EINVAL;
	}
	return 0;
}
EXPORT_SYMBOL_GPL(wm8350_mask_irq);

int wm8350_unmask_irq(struct wm8350 *wm8350, int irq)
{
	switch (irq) {
	case WM8350_IRQ_CHG_BAT_HOT:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_CHG_BAT_HOT_EINT);
	case WM8350_IRQ_CHG_BAT_COLD:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_CHG_BAT_COLD_EINT);
	case WM8350_IRQ_CHG_BAT_FAIL:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_CHG_BAT_FAIL_EINT);
	case WM8350_IRQ_CHG_TO:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_CHG_TO_EINT);
	case WM8350_IRQ_CHG_END:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_CHG_END_EINT);
	case WM8350_IRQ_CHG_START:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_CHG_START_EINT);
	case WM8350_IRQ_CHG_FAST_RDY:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_CHG_FAST_RDY_EINT);
	case WM8350_IRQ_RTC_PER:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_RTC_PER_EINT);
	case WM8350_IRQ_RTC_SEC:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_RTC_SEC_EINT);
	case WM8350_IRQ_RTC_ALM:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_RTC_ALM_EINT);
	case WM8350_IRQ_CHG_VBATT_LT_3P9:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_CHG_VBATT_LT_3P9_EINT);
	case WM8350_IRQ_CHG_VBATT_LT_3P1:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_CHG_VBATT_LT_3P1_EINT);
	case WM8350_IRQ_CHG_VBATT_LT_2P85:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK,
					 WM8350_IM_CHG_VBATT_LT_2P85_EINT);
	case WM8350_IRQ_CS1:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_2_MASK,
					 WM8350_IM_CS1_EINT);
	case WM8350_IRQ_CS2:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_2_MASK,
					 WM8350_IM_CS2_EINT);
	case WM8350_IRQ_USB_LIMIT:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_2_MASK,
					 WM8350_IM_USB_LIMIT_EINT);
	case WM8350_IRQ_AUXADC_DATARDY:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_2_MASK,
					 WM8350_IM_AUXADC_DATARDY_EINT);
	case WM8350_IRQ_AUXADC_DCOMP4:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_2_MASK,
					 WM8350_IM_AUXADC_DCOMP4_EINT);
	case WM8350_IRQ_AUXADC_DCOMP3:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_2_MASK,
					 WM8350_IM_AUXADC_DCOMP3_EINT);
	case WM8350_IRQ_AUXADC_DCOMP2:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_2_MASK,
					 WM8350_IM_AUXADC_DCOMP2_EINT);
	case WM8350_IRQ_AUXADC_DCOMP1:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_2_MASK,
					 WM8350_IM_AUXADC_DCOMP1_EINT);
	case WM8350_IRQ_SYS_HYST_COMP_FAIL:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_2_MASK,
					 WM8350_IM_SYS_HYST_COMP_FAIL_EINT);
	case WM8350_IRQ_SYS_CHIP_GT115:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_2_MASK,
					 WM8350_IM_SYS_CHIP_GT115_EINT);
	case WM8350_IRQ_SYS_CHIP_GT140:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_2_MASK,
					 WM8350_IM_SYS_CHIP_GT140_EINT);
	case WM8350_IRQ_SYS_WDOG_TO:
		return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_2_MASK,
					 WM8350_IM_SYS_WDOG_TO_EINT);
	case WM8350_IRQ_UV_LDO4:
		return wm8350_clear_bits(wm8350,
					 WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
					 WM8350_IM_UV_LDO4_EINT);
	case WM8350_IRQ_UV_LDO3:
		return wm8350_clear_bits(wm8350,
					 WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
					 WM8350_IM_UV_LDO3_EINT);
	case WM8350_IRQ_UV_LDO2:
		return wm8350_clear_bits(wm8350,
					 WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
					 WM8350_IM_UV_LDO2_EINT);
	case WM8350_IRQ_UV_LDO1:
		return wm8350_clear_bits(wm8350,
					 WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
					 WM8350_IM_UV_LDO1_EINT);
	case WM8350_IRQ_UV_DC6:
		return wm8350_clear_bits(wm8350,
					 WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
					 WM8350_IM_UV_DC6_EINT);
	case WM8350_IRQ_UV_DC5:
		return wm8350_clear_bits(wm8350,
					 WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
					 WM8350_IM_UV_DC5_EINT);
	case WM8350_IRQ_UV_DC4:
		return wm8350_clear_bits(wm8350,
					 WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
					 WM8350_IM_UV_DC4_EINT);
	case WM8350_IRQ_UV_DC3:
		return wm8350_clear_bits(wm8350,
					 WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
					 WM8350_IM_UV_DC3_EINT);
	case WM8350_IRQ_UV_DC2:
		return wm8350_clear_bits(wm8350,
					 WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
					 WM8350_IM_UV_DC2_EINT);
	case WM8350_IRQ_UV_DC1:
		return wm8350_clear_bits(wm8350,
					 WM8350_UNDER_VOLTAGE_INT_STATUS_MASK,
					 WM8350_IM_UV_DC1_EINT);
	case WM8350_IRQ_OC_LS:
		return wm8350_clear_bits(wm8350,
					 WM8350_OVER_CURRENT_INT_STATUS_MASK,
					 WM8350_IM_OC_LS_EINT);
	case WM8350_IRQ_EXT_USB_FB:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_EXT_USB_FB_EINT);
	case WM8350_IRQ_EXT_WALL_FB:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_EXT_WALL_FB_EINT);
	case WM8350_IRQ_EXT_BAT_FB:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_EXT_BAT_FB_EINT);
	case WM8350_IRQ_CODEC_JCK_DET_L:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_CODEC_JCK_DET_L_EINT);
	case WM8350_IRQ_CODEC_JCK_DET_R:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_CODEC_JCK_DET_R_EINT);
	case WM8350_IRQ_CODEC_MICSCD:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_CODEC_MICSCD_EINT);
	case WM8350_IRQ_CODEC_MICD:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_CODEC_MICD_EINT);
	case WM8350_IRQ_WKUP_OFF_STATE:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_WKUP_OFF_STATE_EINT);
	case WM8350_IRQ_WKUP_HIB_STATE:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_WKUP_HIB_STATE_EINT);
	case WM8350_IRQ_WKUP_CONV_FAULT:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_WKUP_CONV_FAULT_EINT);
	case WM8350_IRQ_WKUP_WDOG_RST:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_WKUP_OFF_STATE_EINT);
	case WM8350_IRQ_WKUP_GP_PWR_ON:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_WKUP_GP_PWR_ON_EINT);
	case WM8350_IRQ_WKUP_ONKEY:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_WKUP_ONKEY_EINT);
	case WM8350_IRQ_WKUP_GP_WAKEUP:
		return wm8350_clear_bits(wm8350,
					 WM8350_COMPARATOR_INT_STATUS_MASK,
					 WM8350_IM_WKUP_GP_WAKEUP_EINT);
	case WM8350_IRQ_GPIO(0):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP0_EINT);
	case WM8350_IRQ_GPIO(1):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP1_EINT);
	case WM8350_IRQ_GPIO(2):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP2_EINT);
	case WM8350_IRQ_GPIO(3):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP3_EINT);
	case WM8350_IRQ_GPIO(4):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP4_EINT);
	case WM8350_IRQ_GPIO(5):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP5_EINT);
	case WM8350_IRQ_GPIO(6):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP6_EINT);
	case WM8350_IRQ_GPIO(7):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP7_EINT);
	case WM8350_IRQ_GPIO(8):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP8_EINT);
	case WM8350_IRQ_GPIO(9):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP9_EINT);
	case WM8350_IRQ_GPIO(10):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP10_EINT);
	case WM8350_IRQ_GPIO(11):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP11_EINT);
	case WM8350_IRQ_GPIO(12):
		return wm8350_clear_bits(wm8350,
					 WM8350_GPIO_INT_STATUS_MASK,
					 WM8350_IM_GP12_EINT);
	default:
		dev_warn(wm8350->dev, "Attempting to unmask unknown IRQ %d\n",
			 irq);
		return -EINVAL;
	}
	return 0;
}
EXPORT_SYMBOL_GPL(wm8350_unmask_irq);

int wm8350_irq_init(struct wm8350 *wm8350, int irq,
		    struct wm8350_platform_data *pdata)
{
	int ret;
	int flags = IRQF_ONESHOT;

	if (!irq) {
		dev_err(wm8350->dev, "No IRQ configured\n");
		return -EINVAL;
	}

	wm8350_reg_write(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK, 0xFFFF);
	wm8350_reg_write(wm8350, WM8350_INT_STATUS_1_MASK, 0xFFFF);
	wm8350_reg_write(wm8350, WM8350_INT_STATUS_2_MASK, 0xFFFF);
	wm8350_reg_write(wm8350, WM8350_UNDER_VOLTAGE_INT_STATUS_MASK, 0xFFFF);
	wm8350_reg_write(wm8350, WM8350_GPIO_INT_STATUS_MASK, 0xFFFF);
	wm8350_reg_write(wm8350, WM8350_COMPARATOR_INT_STATUS_MASK, 0xFFFF);

	mutex_init(&wm8350->irq_mutex);
	wm8350->chip_irq = irq;

	if (pdata && pdata->irq_high) {
		flags |= IRQF_TRIGGER_HIGH;

		wm8350_set_bits(wm8350, WM8350_SYSTEM_CONTROL_1,
				WM8350_IRQ_POL);
	} else {
		flags |= IRQF_TRIGGER_LOW;

		wm8350_clear_bits(wm8350, WM8350_SYSTEM_CONTROL_1,
				  WM8350_IRQ_POL);
	}

	ret = request_threaded_irq(irq, NULL, wm8350_irq, flags,
				   "wm8350", wm8350);
	if (ret != 0)
		dev_err(wm8350->dev, "Failed to request IRQ: %d\n", ret);

	return ret;
}

int wm8350_irq_exit(struct wm8350 *wm8350)
{
	free_irq(wm8350->chip_irq, wm8350);
	return 0;
}