drivers/mfd/max8925-core.c - kernel/msm-4.19 - Gitiles

 /*
  * Base driver for Maxim MAX8925
  *
  * Copyright (C) 2009 Marvell International Ltd.
  *	Haojian Zhuang <haojian.zhuang@marvell.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/max8925.h>

 #define IRQ_MODE_STATUS		0
 #define IRQ_MODE_MASK		1

 static struct resource backlight_resources[] = {
 	{
 		.name	= "max8925-backlight",
 		.start	= MAX8925_WLED_MODE_CNTL,
 		.end	= MAX8925_WLED_CNTL,
 		.flags	= IORESOURCE_IO,
 	},
 };

 static struct mfd_cell backlight_devs[] = {
 	{
 		.name		= "max8925-backlight",
 		.num_resources	= 1,
 		.resources	= &backlight_resources[0],
 		.id		= -1,
 	},
 };

 static struct resource touch_resources[] = {
 	{
 		.name	= "max8925-tsc",
 		.start	= MAX8925_TSC_IRQ,
 		.end	= MAX8925_ADC_RES_END,
 		.flags	= IORESOURCE_IO,
 	},
 };

 static struct mfd_cell touch_devs[] = {
 	{
 		.name		= "max8925-touch",
 		.num_resources	= 1,
 		.resources	= &touch_resources[0],
 		.id		= -1,
 	},
 };

 #define MAX8925_REG_RESOURCE(_start, _end)	\
 {						\
 	.start	= MAX8925_##_start,		\
 	.end	= MAX8925_##_end,		\
 	.flags	= IORESOURCE_IO,		\
 }

 static struct resource regulator_resources[] = {
 	MAX8925_REG_RESOURCE(SDCTL1, SDCTL1),
 	MAX8925_REG_RESOURCE(SDCTL2, SDCTL2),
 	MAX8925_REG_RESOURCE(SDCTL3, SDCTL3),
 	MAX8925_REG_RESOURCE(LDOCTL1, LDOCTL1),
 	MAX8925_REG_RESOURCE(LDOCTL2, LDOCTL2),
 	MAX8925_REG_RESOURCE(LDOCTL3, LDOCTL3),
 	MAX8925_REG_RESOURCE(LDOCTL4, LDOCTL4),
 	MAX8925_REG_RESOURCE(LDOCTL5, LDOCTL5),
 	MAX8925_REG_RESOURCE(LDOCTL6, LDOCTL6),
 	MAX8925_REG_RESOURCE(LDOCTL7, LDOCTL7),
 	MAX8925_REG_RESOURCE(LDOCTL8, LDOCTL8),
 	MAX8925_REG_RESOURCE(LDOCTL9, LDOCTL9),
 	MAX8925_REG_RESOURCE(LDOCTL10, LDOCTL10),
 	MAX8925_REG_RESOURCE(LDOCTL11, LDOCTL11),
 	MAX8925_REG_RESOURCE(LDOCTL12, LDOCTL12),
 	MAX8925_REG_RESOURCE(LDOCTL13, LDOCTL13),
 	MAX8925_REG_RESOURCE(LDOCTL14, LDOCTL14),
 	MAX8925_REG_RESOURCE(LDOCTL15, LDOCTL15),
 	MAX8925_REG_RESOURCE(LDOCTL16, LDOCTL16),
 	MAX8925_REG_RESOURCE(LDOCTL17, LDOCTL17),
 	MAX8925_REG_RESOURCE(LDOCTL18, LDOCTL18),
 	MAX8925_REG_RESOURCE(LDOCTL19, LDOCTL19),
 	MAX8925_REG_RESOURCE(LDOCTL20, LDOCTL20),
 };

 #define MAX8925_REG_DEVS(_id)						\
 {									\
 	.name		= "max8925-regulator",				\
 	.num_resources	= 1,						\
 	.resources	= &regulator_resources[MAX8925_ID_##_id],	\
 	.id		= MAX8925_ID_##_id,				\
 }

 static struct mfd_cell regulator_devs[] = {
 	MAX8925_REG_DEVS(SD1),
 	MAX8925_REG_DEVS(SD2),
 	MAX8925_REG_DEVS(SD3),
 	MAX8925_REG_DEVS(LDO1),
 	MAX8925_REG_DEVS(LDO2),
 	MAX8925_REG_DEVS(LDO3),
 	MAX8925_REG_DEVS(LDO4),
 	MAX8925_REG_DEVS(LDO5),
 	MAX8925_REG_DEVS(LDO6),
 	MAX8925_REG_DEVS(LDO7),
 	MAX8925_REG_DEVS(LDO8),
 	MAX8925_REG_DEVS(LDO9),
 	MAX8925_REG_DEVS(LDO10),
 	MAX8925_REG_DEVS(LDO11),
 	MAX8925_REG_DEVS(LDO12),
 	MAX8925_REG_DEVS(LDO13),
 	MAX8925_REG_DEVS(LDO14),
 	MAX8925_REG_DEVS(LDO15),
 	MAX8925_REG_DEVS(LDO16),
 	MAX8925_REG_DEVS(LDO17),
 	MAX8925_REG_DEVS(LDO18),
 	MAX8925_REG_DEVS(LDO19),
 	MAX8925_REG_DEVS(LDO20),
 };

 static int __get_irq_offset(struct max8925_chip *chip, int irq, int mode,
 			    int *offset, int *bit)
 {
 	if (!offset || !bit)
 		return -EINVAL;

 	switch (chip->chip_id) {
 	case MAX8925_GPM:
 		*bit = irq % BITS_PER_BYTE;
 		if (irq < (BITS_PER_BYTE << 1)) {	/* irq = [0,15] */
 			*offset = (mode) ? MAX8925_CHG_IRQ1_MASK
 				: MAX8925_CHG_IRQ1;
 			if (irq >= BITS_PER_BYTE)
 				(*offset)++;
 		} else {				/* irq = [16,31] */
 			*offset = (mode) ? MAX8925_ON_OFF_IRQ1_MASK
 				: MAX8925_ON_OFF_IRQ1;
 			if (irq >= (BITS_PER_BYTE * 3))
 				(*offset)++;
 		}
 		break;
 	case MAX8925_ADC:
 		*bit = irq % BITS_PER_BYTE;
 		*offset = (mode) ? MAX8925_TSC_IRQ_MASK : MAX8925_TSC_IRQ;
 		break;
 	default:
 		goto out;
 	}
 	return 0;
 out:
 	dev_err(chip->dev, "Wrong irq #%d is assigned\n", irq);
 	return -EINVAL;
 }

 static int __check_irq(int irq)
 {
 	if ((irq < 0) || (irq >= MAX8925_NUM_IRQ))
 		return -EINVAL;
 	return 0;
 }

 int max8925_mask_irq(struct max8925_chip *chip, int irq)
 {
 	int offset, bit, ret;

 	ret = __get_irq_offset(chip, irq, IRQ_MODE_MASK, &offset, &bit);
 	if (ret < 0)
 		return ret;
 	ret = max8925_set_bits(chip->i2c, offset, 1 << bit, 1 << bit);
 	return ret;
 }

 int max8925_unmask_irq(struct max8925_chip *chip, int irq)
 {
 	int offset, bit, ret;

 	ret = __get_irq_offset(chip, irq, IRQ_MODE_MASK, &offset, &bit);
 	if (ret < 0)
 		return ret;
 	ret = max8925_set_bits(chip->i2c, offset, 1 << bit, 0);
 	return ret;
 }

 #define INT_STATUS_NUM		(MAX8925_NUM_IRQ / BITS_PER_BYTE)

 static irqreturn_t max8925_irq_thread(int irq, void *data)
 {
 	struct max8925_chip *chip = data;
 	unsigned long irq_status[INT_STATUS_NUM];
 	unsigned char status_buf[INT_STATUS_NUM << 1];
 	int i, ret;

 	memset(irq_status, 0, sizeof(unsigned long) * INT_STATUS_NUM);

 	/* all these interrupt status registers are read-only */
 	switch (chip->chip_id) {
 	case MAX8925_GPM:
 		ret = max8925_bulk_read(chip->i2c, MAX8925_CHG_IRQ1,
 					4, status_buf);
 		if (ret < 0)
 			goto out;
 		ret = max8925_bulk_read(chip->i2c, MAX8925_ON_OFF_IRQ1,
 					2, &status_buf[4]);
 		if (ret < 0)
 			goto out;
 		ret = max8925_bulk_read(chip->i2c, MAX8925_ON_OFF_IRQ2,
 					2, &status_buf[6]);
 		if (ret < 0)
 			goto out;
 		/* clear masked interrupt status */
 		status_buf[0] &= (~status_buf[2] & CHG_IRQ1_MASK);
 		irq_status[0] |= status_buf[0];
 		status_buf[1] &= (~status_buf[3] & CHG_IRQ2_MASK);
 		irq_status[0] |= (status_buf[1] << BITS_PER_BYTE);
 		status_buf[4] &= (~status_buf[5] & ON_OFF_IRQ1_MASK);
 		irq_status[0] |= (status_buf[4] << (BITS_PER_BYTE * 2));
 		status_buf[6] &= (~status_buf[7] & ON_OFF_IRQ2_MASK);
 		irq_status[0] |= (status_buf[6] << (BITS_PER_BYTE * 3));
 		break;
 	case MAX8925_ADC:
 		ret = max8925_bulk_read(chip->i2c, MAX8925_TSC_IRQ,
 					2, status_buf);
 		if (ret < 0)
 			goto out;
 		/* clear masked interrupt status */
 		status_buf[0] &= (~status_buf[1] & TSC_IRQ_MASK);
 		irq_status[0] |= status_buf[0];
 		break;
 	default:
 		goto out;
 	}

 	for_each_bit(i, &irq_status[0], MAX8925_NUM_IRQ) {
 		clear_bit(i, irq_status);
 		dev_dbg(chip->dev, "Servicing IRQ #%d in %s\n", i, chip->name);

 		mutex_lock(&chip->irq_lock);
 		if (chip->irq[i].handler)
 			chip->irq[i].handler(i, chip->irq[i].data);
 		else {
 			max8925_mask_irq(chip, i);
 			dev_err(chip->dev, "Noboday cares IRQ #%d in %s. "
 				"Now mask it.\n", i, chip->name);
 		}
 		mutex_unlock(&chip->irq_lock);
 	}
 out:
 	return IRQ_HANDLED;
 }

 int max8925_request_irq(struct max8925_chip *chip, int irq,
 			irq_handler_t handler, void *data)
 {
 	if ((__check_irq(irq) < 0) || !handler)
 		return -EINVAL;

 	mutex_lock(&chip->irq_lock);
 	chip->irq[irq].handler = handler;
 	chip->irq[irq].data = data;
 	mutex_unlock(&chip->irq_lock);
 	return 0;
 }
 EXPORT_SYMBOL(max8925_request_irq);

 int max8925_free_irq(struct max8925_chip *chip, int irq)
 {
 	if (__check_irq(irq) < 0)
 		return -EINVAL;

 	mutex_lock(&chip->irq_lock);
 	chip->irq[irq].handler = NULL;
 	chip->irq[irq].data = NULL;
 	mutex_unlock(&chip->irq_lock);
 	return 0;
 }
 EXPORT_SYMBOL(max8925_free_irq);

 static int __devinit device_gpm_init(struct max8925_chip *chip,
 				      struct i2c_client *i2c,
 				      struct max8925_platform_data *pdata)
 {
 	int ret;

 	/* mask all IRQs */
 	ret = max8925_set_bits(i2c, MAX8925_CHG_IRQ1_MASK, 0x7, 0x7);
 	if (ret < 0)
 		goto out;
 	ret = max8925_set_bits(i2c, MAX8925_CHG_IRQ2_MASK, 0xff, 0xff);
 	if (ret < 0)
 		goto out;
 	ret = max8925_set_bits(i2c, MAX8925_ON_OFF_IRQ1_MASK, 0xff, 0xff);
 	if (ret < 0)
 		goto out;
 	ret = max8925_set_bits(i2c, MAX8925_ON_OFF_IRQ2_MASK, 0x3, 0x3);
 	if (ret < 0)
 		goto out;

 	chip->name = "GPM";
 	memset(chip->irq, 0, sizeof(struct max8925_irq) * MAX8925_NUM_IRQ);
 	ret = request_threaded_irq(i2c->irq, NULL, max8925_irq_thread,
 				IRQF_ONESHOT | IRQF_TRIGGER_LOW,
 				"max8925-gpm", chip);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to request IRQ #%d.\n", i2c->irq);
 		goto out;
 	}
 	chip->chip_irq = i2c->irq;

 	/* enable hard-reset for ONKEY power-off */
 	max8925_set_bits(i2c, MAX8925_SYSENSEL, 0x80, 0x80);

 	ret = mfd_add_devices(chip->dev, 0, &regulator_devs[0],
 			      ARRAY_SIZE(regulator_devs),
 			      &regulator_resources[0], 0);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to add regulator subdev\n");
 		goto out_irq;
 	}

 	if (pdata && pdata->backlight) {
 		ret = mfd_add_devices(chip->dev, 0, &backlight_devs[0],
 				      ARRAY_SIZE(backlight_devs),
 				      &backlight_resources[0], 0);
 		if (ret < 0) {
 			dev_err(chip->dev, "Failed to add backlight subdev\n");
 			goto out_dev;
 		}
 	}
 	return 0;
 out_dev:
 	mfd_remove_devices(chip->dev);
 out_irq:
 	if (chip->chip_irq)
 		free_irq(chip->chip_irq, chip);
 out:
 	return ret;
 }

 static int __devinit device_adc_init(struct max8925_chip *chip,
 				     struct i2c_client *i2c,
 				     struct max8925_platform_data *pdata)
 {
 	int ret;

 	/* mask all IRQs */
 	ret = max8925_set_bits(i2c, MAX8925_TSC_IRQ_MASK, 3, 3);

 	chip->name = "ADC";
 	memset(chip->irq, 0, sizeof(struct max8925_irq) * MAX8925_NUM_IRQ);
 	ret = request_threaded_irq(i2c->irq, NULL, max8925_irq_thread,
 				IRQF_ONESHOT | IRQF_TRIGGER_LOW,
 				"max8925-adc", chip);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to request IRQ #%d.\n", i2c->irq);
 		goto out;
 	}
 	chip->chip_irq = i2c->irq;

 	if (pdata && pdata->touch) {
 		ret = mfd_add_devices(chip->dev, 0, &touch_devs[0],
 				      ARRAY_SIZE(touch_devs),
 				      &touch_resources[0], 0);
 		if (ret < 0) {
 			dev_err(chip->dev, "Failed to add touch subdev\n");
 			goto out_irq;
 		}
 	}
 	return 0;
 out_irq:
 	if (chip->chip_irq)
 		free_irq(chip->chip_irq, chip);
 out:
 	return ret;
 }

 int __devinit max8925_device_init(struct max8925_chip *chip,
 				  struct max8925_platform_data *pdata)
 {
 	switch (chip->chip_id) {
 	case MAX8925_GPM:
 		device_gpm_init(chip, chip->i2c, pdata);
 		break;
 	case MAX8925_ADC:
 		device_adc_init(chip, chip->i2c, pdata);
 		break;
 	}
 	return 0;
 }

 void max8925_device_exit(struct max8925_chip *chip)
 {
 	if (chip->chip_irq >= 0)
 		free_irq(chip->chip_irq, chip);
 	mfd_remove_devices(chip->dev);
 }

 MODULE_DESCRIPTION("PMIC Driver for Maxim MAX8925");
 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com");
 MODULE_LICENSE("GPL");
	/*
	* Base driver for Maxim MAX8925
	*
	* Copyright (C) 2009 Marvell International Ltd.
	* Haojian Zhuang <haojian.zhuang@marvell.com>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/i2c.h>
	#include <linux/interrupt.h>
	#include <linux/platform_device.h>
	#include <linux/mfd/core.h>
	#include <linux/mfd/max8925.h>

	#define IRQ_MODE_STATUS 0
	#define IRQ_MODE_MASK 1

	static struct resource backlight_resources[] = {
	{
	.name = "max8925-backlight",
	.start = MAX8925_WLED_MODE_CNTL,
	.end = MAX8925_WLED_CNTL,
	.flags = IORESOURCE_IO,
	},
	};

	static struct mfd_cell backlight_devs[] = {
	{
	.name = "max8925-backlight",
	.num_resources = 1,
	.resources = &backlight_resources[0],
	.id = -1,
	},
	};

	static struct resource touch_resources[] = {
	{
	.name = "max8925-tsc",
	.start = MAX8925_TSC_IRQ,
	.end = MAX8925_ADC_RES_END,
	.flags = IORESOURCE_IO,
	},
	};

	static struct mfd_cell touch_devs[] = {
	{
	.name = "max8925-touch",
	.num_resources = 1,
	.resources = &touch_resources[0],
	.id = -1,
	},
	};

	#define MAX8925_REG_RESOURCE(_start, _end) \
	{ \
	.start = MAX8925_##_start, \
	.end = MAX8925_##_end, \
	.flags = IORESOURCE_IO, \
	}

	static struct resource regulator_resources[] = {
	MAX8925_REG_RESOURCE(SDCTL1, SDCTL1),
	MAX8925_REG_RESOURCE(SDCTL2, SDCTL2),
	MAX8925_REG_RESOURCE(SDCTL3, SDCTL3),
	MAX8925_REG_RESOURCE(LDOCTL1, LDOCTL1),
	MAX8925_REG_RESOURCE(LDOCTL2, LDOCTL2),
	MAX8925_REG_RESOURCE(LDOCTL3, LDOCTL3),
	MAX8925_REG_RESOURCE(LDOCTL4, LDOCTL4),
	MAX8925_REG_RESOURCE(LDOCTL5, LDOCTL5),
	MAX8925_REG_RESOURCE(LDOCTL6, LDOCTL6),
	MAX8925_REG_RESOURCE(LDOCTL7, LDOCTL7),
	MAX8925_REG_RESOURCE(LDOCTL8, LDOCTL8),
	MAX8925_REG_RESOURCE(LDOCTL9, LDOCTL9),
	MAX8925_REG_RESOURCE(LDOCTL10, LDOCTL10),
	MAX8925_REG_RESOURCE(LDOCTL11, LDOCTL11),
	MAX8925_REG_RESOURCE(LDOCTL12, LDOCTL12),
	MAX8925_REG_RESOURCE(LDOCTL13, LDOCTL13),
	MAX8925_REG_RESOURCE(LDOCTL14, LDOCTL14),
	MAX8925_REG_RESOURCE(LDOCTL15, LDOCTL15),
	MAX8925_REG_RESOURCE(LDOCTL16, LDOCTL16),
	MAX8925_REG_RESOURCE(LDOCTL17, LDOCTL17),
	MAX8925_REG_RESOURCE(LDOCTL18, LDOCTL18),
	MAX8925_REG_RESOURCE(LDOCTL19, LDOCTL19),
	MAX8925_REG_RESOURCE(LDOCTL20, LDOCTL20),
	};

	#define MAX8925_REG_DEVS(_id) \
	{ \
	.name = "max8925-regulator", \
	.num_resources = 1, \
	.resources = &regulator_resources[MAX8925_ID_##_id], \
	.id = MAX8925_ID_##_id, \
	}

	static struct mfd_cell regulator_devs[] = {
	MAX8925_REG_DEVS(SD1),
	MAX8925_REG_DEVS(SD2),
	MAX8925_REG_DEVS(SD3),
	MAX8925_REG_DEVS(LDO1),
	MAX8925_REG_DEVS(LDO2),
	MAX8925_REG_DEVS(LDO3),
	MAX8925_REG_DEVS(LDO4),
	MAX8925_REG_DEVS(LDO5),
	MAX8925_REG_DEVS(LDO6),
	MAX8925_REG_DEVS(LDO7),
	MAX8925_REG_DEVS(LDO8),
	MAX8925_REG_DEVS(LDO9),
	MAX8925_REG_DEVS(LDO10),
	MAX8925_REG_DEVS(LDO11),
	MAX8925_REG_DEVS(LDO12),
	MAX8925_REG_DEVS(LDO13),
	MAX8925_REG_DEVS(LDO14),
	MAX8925_REG_DEVS(LDO15),
	MAX8925_REG_DEVS(LDO16),
	MAX8925_REG_DEVS(LDO17),
	MAX8925_REG_DEVS(LDO18),
	MAX8925_REG_DEVS(LDO19),
	MAX8925_REG_DEVS(LDO20),
	};

	static int __get_irq_offset(struct max8925_chip *chip, int irq, int mode,
	int offset, int bit)
	{
	if (!offset \|\| !bit)
	return -EINVAL;

	switch (chip->chip_id) {
	case MAX8925_GPM:
	*bit = irq % BITS_PER_BYTE;
	if (irq < (BITS_PER_BYTE << 1)) { /* irq = [0,15] */
	*offset = (mode) ? MAX8925_CHG_IRQ1_MASK
	: MAX8925_CHG_IRQ1;
	if (irq >= BITS_PER_BYTE)
	(*offset)++;
	} else { /* irq = [16,31] */
	*offset = (mode) ? MAX8925_ON_OFF_IRQ1_MASK
	: MAX8925_ON_OFF_IRQ1;
	if (irq >= (BITS_PER_BYTE * 3))
	(*offset)++;
	}
	break;
	case MAX8925_ADC:
	*bit = irq % BITS_PER_BYTE;
	*offset = (mode) ? MAX8925_TSC_IRQ_MASK : MAX8925_TSC_IRQ;
	break;
	default:
	goto out;
	}
	return 0;
	out:
	dev_err(chip->dev, "Wrong irq #%d is assigned\n", irq);
	return -EINVAL;
	}

	static int __check_irq(int irq)
	{
	if ((irq < 0) \|\| (irq >= MAX8925_NUM_IRQ))
	return -EINVAL;
	return 0;
	}

	int max8925_mask_irq(struct max8925_chip *chip, int irq)
	{
	int offset, bit, ret;

	ret = __get_irq_offset(chip, irq, IRQ_MODE_MASK, &offset, &bit);
	if (ret < 0)
	return ret;
	ret = max8925_set_bits(chip->i2c, offset, 1 << bit, 1 << bit);
	return ret;
	}

	int max8925_unmask_irq(struct max8925_chip *chip, int irq)
	{
	int offset, bit, ret;

	ret = __get_irq_offset(chip, irq, IRQ_MODE_MASK, &offset, &bit);
	if (ret < 0)
	return ret;
	ret = max8925_set_bits(chip->i2c, offset, 1 << bit, 0);
	return ret;
	}

	#define INT_STATUS_NUM (MAX8925_NUM_IRQ / BITS_PER_BYTE)

	static irqreturn_t max8925_irq_thread(int irq, void *data)
	{
	struct max8925_chip *chip = data;
	unsigned long irq_status[INT_STATUS_NUM];
	unsigned char status_buf[INT_STATUS_NUM << 1];
	int i, ret;

	memset(irq_status, 0, sizeof(unsigned long) * INT_STATUS_NUM);

	/* all these interrupt status registers are read-only */
	switch (chip->chip_id) {
	case MAX8925_GPM:
	ret = max8925_bulk_read(chip->i2c, MAX8925_CHG_IRQ1,
	4, status_buf);
	if (ret < 0)
	goto out;
	ret = max8925_bulk_read(chip->i2c, MAX8925_ON_OFF_IRQ1,
	2, &status_buf[4]);
	if (ret < 0)
	goto out;
	ret = max8925_bulk_read(chip->i2c, MAX8925_ON_OFF_IRQ2,
	2, &status_buf[6]);
	if (ret < 0)
	goto out;
	/* clear masked interrupt status */
	status_buf[0] &= (~status_buf[2] & CHG_IRQ1_MASK);
	irq_status[0] \|= status_buf[0];
	status_buf[1] &= (~status_buf[3] & CHG_IRQ2_MASK);
	irq_status[0] \|= (status_buf[1] << BITS_PER_BYTE);
	status_buf[4] &= (~status_buf[5] & ON_OFF_IRQ1_MASK);
	irq_status[0] \|= (status_buf[4] << (BITS_PER_BYTE * 2));
	status_buf[6] &= (~status_buf[7] & ON_OFF_IRQ2_MASK);
	irq_status[0] \|= (status_buf[6] << (BITS_PER_BYTE * 3));
	break;
	case MAX8925_ADC:
	ret = max8925_bulk_read(chip->i2c, MAX8925_TSC_IRQ,
	2, status_buf);
	if (ret < 0)
	goto out;
	/* clear masked interrupt status */
	status_buf[0] &= (~status_buf[1] & TSC_IRQ_MASK);
	irq_status[0] \|= status_buf[0];
	break;
	default:
	goto out;
	}

	for_each_bit(i, &irq_status[0], MAX8925_NUM_IRQ) {
	clear_bit(i, irq_status);
	dev_dbg(chip->dev, "Servicing IRQ #%d in %s\n", i, chip->name);

	mutex_lock(&chip->irq_lock);
	if (chip->irq[i].handler)
	chip->irq[i].handler(i, chip->irq[i].data);
	else {
	max8925_mask_irq(chip, i);
	dev_err(chip->dev, "Noboday cares IRQ #%d in %s. "
	"Now mask it.\n", i, chip->name);
	}
	mutex_unlock(&chip->irq_lock);
	}
	out:
	return IRQ_HANDLED;
	}

	int max8925_request_irq(struct max8925_chip *chip, int irq,
	irq_handler_t handler, void *data)
	{
	if ((__check_irq(irq) < 0) \|\| !handler)
	return -EINVAL;

	mutex_lock(&chip->irq_lock);
	chip->irq[irq].handler = handler;
	chip->irq[irq].data = data;
	mutex_unlock(&chip->irq_lock);
	return 0;
	}
	EXPORT_SYMBOL(max8925_request_irq);

	int max8925_free_irq(struct max8925_chip *chip, int irq)
	{
	if (__check_irq(irq) < 0)
	return -EINVAL;

	mutex_lock(&chip->irq_lock);
	chip->irq[irq].handler = NULL;
	chip->irq[irq].data = NULL;
	mutex_unlock(&chip->irq_lock);
	return 0;
	}
	EXPORT_SYMBOL(max8925_free_irq);

	static int __devinit device_gpm_init(struct max8925_chip *chip,
	struct i2c_client *i2c,
	struct max8925_platform_data *pdata)
	{
	int ret;

	/* mask all IRQs */
	ret = max8925_set_bits(i2c, MAX8925_CHG_IRQ1_MASK, 0x7, 0x7);
	if (ret < 0)
	goto out;
	ret = max8925_set_bits(i2c, MAX8925_CHG_IRQ2_MASK, 0xff, 0xff);
	if (ret < 0)
	goto out;
	ret = max8925_set_bits(i2c, MAX8925_ON_OFF_IRQ1_MASK, 0xff, 0xff);
	if (ret < 0)
	goto out;
	ret = max8925_set_bits(i2c, MAX8925_ON_OFF_IRQ2_MASK, 0x3, 0x3);
	if (ret < 0)
	goto out;

	chip->name = "GPM";
	memset(chip->irq, 0, sizeof(struct max8925_irq) * MAX8925_NUM_IRQ);
	ret = request_threaded_irq(i2c->irq, NULL, max8925_irq_thread,
	IRQF_ONESHOT \| IRQF_TRIGGER_LOW,
	"max8925-gpm", chip);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to request IRQ #%d.\n", i2c->irq);
	goto out;
	}
	chip->chip_irq = i2c->irq;

	/* enable hard-reset for ONKEY power-off */
	max8925_set_bits(i2c, MAX8925_SYSENSEL, 0x80, 0x80);

	ret = mfd_add_devices(chip->dev, 0, &regulator_devs[0],
	ARRAY_SIZE(regulator_devs),
	&regulator_resources[0], 0);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to add regulator subdev\n");
	goto out_irq;
	}

	if (pdata && pdata->backlight) {
	ret = mfd_add_devices(chip->dev, 0, &backlight_devs[0],
	ARRAY_SIZE(backlight_devs),
	&backlight_resources[0], 0);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to add backlight subdev\n");
	goto out_dev;
	}
	}
	return 0;
	out_dev:
	mfd_remove_devices(chip->dev);
	out_irq:
	if (chip->chip_irq)
	free_irq(chip->chip_irq, chip);
	out:
	return ret;
	}

	static int __devinit device_adc_init(struct max8925_chip *chip,
	struct i2c_client *i2c,
	struct max8925_platform_data *pdata)
	{
	int ret;

	/* mask all IRQs */
	ret = max8925_set_bits(i2c, MAX8925_TSC_IRQ_MASK, 3, 3);

	chip->name = "ADC";
	memset(chip->irq, 0, sizeof(struct max8925_irq) * MAX8925_NUM_IRQ);
	ret = request_threaded_irq(i2c->irq, NULL, max8925_irq_thread,
	IRQF_ONESHOT \| IRQF_TRIGGER_LOW,
	"max8925-adc", chip);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to request IRQ #%d.\n", i2c->irq);
	goto out;
	}
	chip->chip_irq = i2c->irq;

	if (pdata && pdata->touch) {
	ret = mfd_add_devices(chip->dev, 0, &touch_devs[0],
	ARRAY_SIZE(touch_devs),
	&touch_resources[0], 0);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to add touch subdev\n");
	goto out_irq;
	}
	}
	return 0;
	out_irq:
	if (chip->chip_irq)
	free_irq(chip->chip_irq, chip);
	out:
	return ret;
	}

	int __devinit max8925_device_init(struct max8925_chip *chip,
	struct max8925_platform_data *pdata)
	{
	switch (chip->chip_id) {
	case MAX8925_GPM:
	device_gpm_init(chip, chip->i2c, pdata);
	break;
	case MAX8925_ADC:
	device_adc_init(chip, chip->i2c, pdata);
	break;
	}
	return 0;
	}

	void max8925_device_exit(struct max8925_chip *chip)
	{
	if (chip->chip_irq >= 0)
	free_irq(chip->chip_irq, chip);
	mfd_remove_devices(chip->dev);
	}

	MODULE_DESCRIPTION("PMIC Driver for Maxim MAX8925");
	MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com");
	MODULE_LICENSE("GPL");