drivers/mfd/88pm860x-core.c - linux - Git at Google

 /*
  * Base driver for Marvell 88PM8607
  *
  * 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/88pm860x.h>

 char pm860x_backlight_name[][MFD_NAME_SIZE] = {
 	"backlight-0",
 	"backlight-1",
 	"backlight-2",
 };
 EXPORT_SYMBOL(pm860x_backlight_name);

 char pm860x_led_name[][MFD_NAME_SIZE] = {
 	"led0-red",
 	"led0-green",
 	"led0-blue",
 	"led1-red",
 	"led1-green",
 	"led1-blue",
 };
 EXPORT_SYMBOL(pm860x_led_name);

 #define PM8606_BACKLIGHT_RESOURCE(_i, _x)		\
 {							\
 	.name	= pm860x_backlight_name[_i],		\
 	.start	= PM8606_##_x,				\
 	.end	= PM8606_##_x,				\
 	.flags	= IORESOURCE_IO,			\
 }

 static struct resource backlight_resources[] = {
 	PM8606_BACKLIGHT_RESOURCE(PM8606_BACKLIGHT1, WLED1A),
 	PM8606_BACKLIGHT_RESOURCE(PM8606_BACKLIGHT2, WLED2A),
 	PM8606_BACKLIGHT_RESOURCE(PM8606_BACKLIGHT3, WLED3A),
 };

 #define PM8606_BACKLIGHT_DEVS(_i)			\
 {							\
 	.name		= "88pm860x-backlight",		\
 	.num_resources	= 1,				\
 	.resources	= &backlight_resources[_i],	\
 	.id		= _i,				\
 }

 static struct mfd_cell backlight_devs[] = {
 	PM8606_BACKLIGHT_DEVS(PM8606_BACKLIGHT1),
 	PM8606_BACKLIGHT_DEVS(PM8606_BACKLIGHT2),
 	PM8606_BACKLIGHT_DEVS(PM8606_BACKLIGHT3),
 };

 #define PM8606_LED_RESOURCE(_i, _x)			\
 {							\
 	.name	= pm860x_led_name[_i],			\
 	.start	= PM8606_##_x,				\
 	.end	= PM8606_##_x,				\
 	.flags	= IORESOURCE_IO,			\
 }

 static struct resource led_resources[] = {
 	PM8606_LED_RESOURCE(PM8606_LED1_RED, RGB2B),
 	PM8606_LED_RESOURCE(PM8606_LED1_GREEN, RGB2C),
 	PM8606_LED_RESOURCE(PM8606_LED1_BLUE, RGB2D),
 	PM8606_LED_RESOURCE(PM8606_LED2_RED, RGB1B),
 	PM8606_LED_RESOURCE(PM8606_LED2_GREEN, RGB1C),
 	PM8606_LED_RESOURCE(PM8606_LED2_BLUE, RGB1D),
 };

 #define PM8606_LED_DEVS(_i)				\
 {							\
 	.name		= "88pm860x-led",		\
 	.num_resources	= 1,				\
 	.resources	= &led_resources[_i],		\
 	.id		= _i,				\
 }

 static struct mfd_cell led_devs[] = {
 	PM8606_LED_DEVS(PM8606_LED1_RED),
 	PM8606_LED_DEVS(PM8606_LED1_GREEN),
 	PM8606_LED_DEVS(PM8606_LED1_BLUE),
 	PM8606_LED_DEVS(PM8606_LED2_RED),
 	PM8606_LED_DEVS(PM8606_LED2_GREEN),
 	PM8606_LED_DEVS(PM8606_LED2_BLUE),
 };

 static struct resource touch_resources[] = {
 	{
 		.start	= PM8607_IRQ_PEN,
 		.end	= PM8607_IRQ_PEN,
 		.flags	= IORESOURCE_IRQ,
 	},
 };

 static struct mfd_cell touch_devs[] = {
 	{
 		.name		= "88pm860x-touch",
 		.num_resources	= 1,
 		.resources	= &touch_resources[0],
 	},
 };

 #define PM8607_REG_RESOURCE(_start, _end)		\
 {							\
 	.start	= PM8607_##_start,			\
 	.end	= PM8607_##_end,			\
 	.flags	= IORESOURCE_IO,			\
 }

 static struct resource regulator_resources[] = {
 	PM8607_REG_RESOURCE(BUCK1, BUCK1),
 	PM8607_REG_RESOURCE(BUCK2, BUCK2),
 	PM8607_REG_RESOURCE(BUCK3, BUCK3),
 	PM8607_REG_RESOURCE(LDO1,  LDO1),
 	PM8607_REG_RESOURCE(LDO2,  LDO2),
 	PM8607_REG_RESOURCE(LDO3,  LDO3),
 	PM8607_REG_RESOURCE(LDO4,  LDO4),
 	PM8607_REG_RESOURCE(LDO5,  LDO5),
 	PM8607_REG_RESOURCE(LDO6,  LDO6),
 	PM8607_REG_RESOURCE(LDO7,  LDO7),
 	PM8607_REG_RESOURCE(LDO8,  LDO8),
 	PM8607_REG_RESOURCE(LDO9,  LDO9),
 	PM8607_REG_RESOURCE(LDO10, LDO10),
 	PM8607_REG_RESOURCE(LDO12, LDO12),
 	PM8607_REG_RESOURCE(LDO14, LDO14),
 };

 #define PM8607_REG_DEVS(_name, _id)					\
 {									\
 	.name		= "88pm8607-" #_name,				\
 	.num_resources	= 1,						\
 	.resources	= &regulator_resources[PM8607_ID_##_id],	\
 	.id		= PM8607_ID_##_id,				\
 }

 static struct mfd_cell regulator_devs[] = {
 	PM8607_REG_DEVS(buck1, BUCK1),
 	PM8607_REG_DEVS(buck2, BUCK2),
 	PM8607_REG_DEVS(buck3, BUCK3),
 	PM8607_REG_DEVS(ldo1,  LDO1),
 	PM8607_REG_DEVS(ldo2,  LDO2),
 	PM8607_REG_DEVS(ldo3,  LDO3),
 	PM8607_REG_DEVS(ldo4,  LDO4),
 	PM8607_REG_DEVS(ldo5,  LDO5),
 	PM8607_REG_DEVS(ldo6,  LDO6),
 	PM8607_REG_DEVS(ldo7,  LDO7),
 	PM8607_REG_DEVS(ldo8,  LDO8),
 	PM8607_REG_DEVS(ldo9,  LDO9),
 	PM8607_REG_DEVS(ldo10, LDO10),
 	PM8607_REG_DEVS(ldo12, LDO12),
 	PM8607_REG_DEVS(ldo14, LDO14),
 };

 #define CHECK_IRQ(irq)					\
 do {							\
 	if ((irq < 0) || (irq >= PM860X_NUM_IRQ))	\
 		return -EINVAL;				\
 } while (0)

 /* IRQs only occur on 88PM8607 */
 int pm860x_mask_irq(struct pm860x_chip *chip, int irq)
 {
 	struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
 				: chip->companion;
 	int offset, data, ret;

 	CHECK_IRQ(irq);

 	offset = (irq >> 3) + PM8607_INT_MASK_1;
 	data = 1 << (irq % 8);
 	ret = pm860x_set_bits(i2c, offset, data, 0);

 	return ret;
 }
 EXPORT_SYMBOL(pm860x_mask_irq);

 int pm860x_unmask_irq(struct pm860x_chip *chip, int irq)
 {
 	struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
 				: chip->companion;
 	int offset, data, ret;

 	CHECK_IRQ(irq);

 	offset = (irq >> 3) + PM8607_INT_MASK_1;
 	data = 1 << (irq % 8);
 	ret = pm860x_set_bits(i2c, offset, data, data);

 	return ret;
 }
 EXPORT_SYMBOL(pm860x_unmask_irq);

 #define INT_STATUS_NUM		(3)

 static irqreturn_t pm8607_irq_thread(int irq, void *data)
 {
 	DECLARE_BITMAP(irq_status, PM860X_NUM_IRQ);
 	struct pm860x_chip *chip = data;
 	struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
 				: chip->companion;
 	unsigned char status_buf[INT_STATUS_NUM << 1];
 	unsigned long value;
 	int i, ret;

 	irq_status[0] = 0;

 	/* read out status register */
 	ret = pm860x_bulk_read(i2c, PM8607_INT_STATUS1,
 				INT_STATUS_NUM << 1, status_buf);
 	if (ret < 0)
 		goto out;
 	if (chip->irq_mode) {
 		/* 0, clear by read. 1, clear by write */
 		ret = pm860x_bulk_write(i2c, PM8607_INT_STATUS1,
 					INT_STATUS_NUM, status_buf);
 		if (ret < 0)
 			goto out;
 	}

 	/* clear masked interrupt status */
 	for (i = 0, value = 0; i < INT_STATUS_NUM; i++) {
 		status_buf[i] &= status_buf[i + INT_STATUS_NUM];
 		irq_status[0] |= status_buf[i] << (i * 8);
 	}

 	while (!bitmap_empty(irq_status, PM860X_NUM_IRQ)) {
 		irq = find_first_bit(irq_status, PM860X_NUM_IRQ);
 		clear_bit(irq, irq_status);
 		dev_dbg(chip->dev, "Servicing IRQ #%d\n", irq);

 		mutex_lock(&chip->irq_lock);
 		if (chip->irq[irq].handler)
 			chip->irq[irq].handler(irq, chip->irq[irq].data);
 		else {
 			pm860x_mask_irq(chip, irq);
 			dev_err(chip->dev, "Nobody cares IRQ %d. "
 				"Now mask it.\n", irq);
 			for (i = 0; i < (INT_STATUS_NUM << 1); i++) {
 				dev_err(chip->dev, "status[%d]:%x\n", i,
 					status_buf[i]);
 			}
 		}
 		mutex_unlock(&chip->irq_lock);
 	}
 out:
 	return IRQ_HANDLED;
 }

 int pm860x_request_irq(struct pm860x_chip *chip, int irq,
 		       irq_handler_t handler, void *data)
 {
 	CHECK_IRQ(irq);
 	if (!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(pm860x_request_irq);

 int pm860x_free_irq(struct pm860x_chip *chip, int irq)
 {
 	CHECK_IRQ(irq);

 	mutex_lock(&chip->irq_lock);
 	chip->irq[irq].handler = NULL;
 	chip->irq[irq].data = NULL;
 	mutex_unlock(&chip->irq_lock);

 	return 0;
 }
 EXPORT_SYMBOL(pm860x_free_irq);

 static int __devinit device_gpadc_init(struct pm860x_chip *chip,
 				       struct pm860x_platform_data *pdata)
 {
 	struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
 				: chip->companion;
 	int use_gpadc = 0, data, ret;

 	/* initialize GPADC without activating it */

 	if (pdata && pdata->touch) {
 		/* set GPADC MISC1 register */
 		data = 0;
 		data |= (pdata->touch->gpadc_prebias << 1)
 			& PM8607_GPADC_PREBIAS_MASK;
 		data |= (pdata->touch->slot_cycle << 3)
 			& PM8607_GPADC_SLOT_CYCLE_MASK;
 		data |= (pdata->touch->off_scale << 5)
 			& PM8607_GPADC_OFF_SCALE_MASK;
 		data |= (pdata->touch->sw_cal << 7)
 			& PM8607_GPADC_SW_CAL_MASK;
 		if (data) {
 			ret = pm860x_reg_write(i2c, PM8607_GPADC_MISC1, data);
 			if (ret < 0)
 				goto out;
 		}
 		/* set tsi prebias time */
 		if (pdata->touch->tsi_prebias) {
 			data = pdata->touch->tsi_prebias;
 			ret = pm860x_reg_write(i2c, PM8607_TSI_PREBIAS, data);
 			if (ret < 0)
 				goto out;
 		}
 		/* set prebias & prechg time of pen detect */
 		data = 0;
 		data |= pdata->touch->pen_prebias & PM8607_PD_PREBIAS_MASK;
 		data |= (pdata->touch->pen_prechg << 5)
 			& PM8607_PD_PRECHG_MASK;
 		if (data) {
 			ret = pm860x_reg_write(i2c, PM8607_PD_PREBIAS, data);
 			if (ret < 0)
 				goto out;
 		}

 		use_gpadc = 1;
 	}

 	/* turn on GPADC */
 	if (use_gpadc) {
 		ret = pm860x_set_bits(i2c, PM8607_GPADC_MISC1,
 				      PM8607_GPADC_EN, PM8607_GPADC_EN);
 	}
 out:
 	return ret;
 }

 static int __devinit device_irq_init(struct pm860x_chip *chip,
 				     struct pm860x_platform_data *pdata)
 {
 	struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
 				: chip->companion;
 	unsigned char status_buf[INT_STATUS_NUM];
 	int data, mask, ret = -EINVAL;

 	mutex_init(&chip->irq_lock);

 	mask = PM8607_B0_MISC1_INV_INT | PM8607_B0_MISC1_INT_CLEAR
 		| PM8607_B0_MISC1_INT_MASK;
 	data = 0;
 	chip->irq_mode = 0;
 	if (pdata && pdata->irq_mode) {
 		/*
 		 * irq_mode defines the way of clearing interrupt. If it's 1,
 		 * clear IRQ by write. Otherwise, clear it by read.
 		 * This control bit is valid from 88PM8607 B0 steping.
 		 */
 		data |= PM8607_B0_MISC1_INT_CLEAR;
 		chip->irq_mode = 1;
 	}
 	ret = pm860x_set_bits(i2c, PM8607_B0_MISC1, mask, data);
 	if (ret < 0)
 		goto out;

 	/* mask all IRQs */
 	memset(status_buf, 0, INT_STATUS_NUM);
 	ret = pm860x_bulk_write(i2c, PM8607_INT_MASK_1,
 				INT_STATUS_NUM, status_buf);
 	if (ret < 0)
 		goto out;

 	if (chip->irq_mode) {
 		/* clear interrupt status by write */
 		memset(status_buf, 0xFF, INT_STATUS_NUM);
 		ret = pm860x_bulk_write(i2c, PM8607_INT_STATUS1,
 					INT_STATUS_NUM, status_buf);
 	} else {
 		/* clear interrupt status by read */
 		ret = pm860x_bulk_read(i2c, PM8607_INT_STATUS1,
 					INT_STATUS_NUM, status_buf);
 	}
 	if (ret < 0)
 		goto out;

 	memset(chip->irq, 0, sizeof(struct pm860x_irq) * PM860X_NUM_IRQ);

 	ret = request_threaded_irq(i2c->irq, NULL, pm8607_irq_thread,
 				IRQF_ONESHOT | IRQF_TRIGGER_LOW,
 				"88PM8607", chip);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to request IRQ #%d.\n", i2c->irq);
 		goto out;
 	}
 	chip->chip_irq = i2c->irq;
 	return 0;
 out:
 	return ret;
 }

 static void __devexit device_irq_exit(struct pm860x_chip *chip)
 {
 	if (chip->chip_irq >= 0)
 		free_irq(chip->chip_irq, chip);
 }

 static void __devinit device_8606_init(struct pm860x_chip *chip,
 				       struct i2c_client *i2c,
 				       struct pm860x_platform_data *pdata)
 {
 	int ret;

 	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;
 		}
 	}

 	if (pdata && pdata->led) {
 		ret = mfd_add_devices(chip->dev, 0, &led_devs[0],
 				      ARRAY_SIZE(led_devs),
 				      &led_resources[0], 0);
 		if (ret < 0) {
 			dev_err(chip->dev, "Failed to add led "
 				"subdev\n");
 			goto out_dev;
 		}
 	}
 	return;
 out_dev:
 	mfd_remove_devices(chip->dev);
 	device_irq_exit(chip);
 }

 static void __devinit device_8607_init(struct pm860x_chip *chip,
 				       struct i2c_client *i2c,
 				       struct pm860x_platform_data *pdata)
 {
 	int data, ret;

 	ret = pm860x_reg_read(i2c, PM8607_CHIP_ID);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
 		goto out;
 	}
 	if ((ret & PM8607_VERSION_MASK) == PM8607_VERSION)
 		dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
 			 ret);
 	else {
 		dev_err(chip->dev, "Failed to detect Marvell 88PM8607. "
 			"Chip ID: %02x\n", ret);
 		goto out;
 	}

 	ret = pm860x_reg_read(i2c, PM8607_BUCK3);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
 		goto out;
 	}
 	if (ret & PM8607_BUCK3_DOUBLE)
 		chip->buck3_double = 1;

 	ret = pm860x_reg_read(i2c, PM8607_B0_MISC1);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
 		goto out;
 	}

 	if (pdata && (pdata->i2c_port == PI2C_PORT))
 		data = PM8607_B0_MISC1_PI2C;
 	else
 		data = 0;
 	ret = pm860x_set_bits(i2c, PM8607_B0_MISC1, PM8607_B0_MISC1_PI2C, data);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to access MISC1:%d\n", ret);
 		goto out;
 	}

 	ret = device_gpadc_init(chip, pdata);
 	if (ret < 0)
 		goto out;

 	ret = device_irq_init(chip, pdata);
 	if (ret < 0)
 		goto out;

 	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_dev;
 	}

 	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_dev;
 		}
 	}
 	return;
 out_dev:
 	mfd_remove_devices(chip->dev);
 	device_irq_exit(chip);
 out:
 	return;
 }

 int pm860x_device_init(struct pm860x_chip *chip,
 		       struct pm860x_platform_data *pdata)
 {
 	chip->chip_irq = -EINVAL;

 	switch (chip->id) {
 	case CHIP_PM8606:
 		device_8606_init(chip, chip->client, pdata);
 		break;
 	case CHIP_PM8607:
 		device_8607_init(chip, chip->client, pdata);
 		break;
 	}

 	if (chip->companion) {
 		switch (chip->id) {
 		case CHIP_PM8607:
 			device_8606_init(chip, chip->companion, pdata);
 			break;
 		case CHIP_PM8606:
 			device_8607_init(chip, chip->companion, pdata);
 			break;
 		}
 	}

 	return 0;
 }

 void pm860x_device_exit(struct pm860x_chip *chip)
 {
 	device_irq_exit(chip);
 	mfd_remove_devices(chip->dev);
 }

 MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM860x");
 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
 MODULE_LICENSE("GPL");
	/*
	* Base driver for Marvell 88PM8607
	*
	* 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/88pm860x.h>

	char pm860x_backlight_name[][MFD_NAME_SIZE] = {
	"backlight-0",
	"backlight-1",
	"backlight-2",
	};
	EXPORT_SYMBOL(pm860x_backlight_name);

	char pm860x_led_name[][MFD_NAME_SIZE] = {
	"led0-red",
	"led0-green",
	"led0-blue",
	"led1-red",
	"led1-green",
	"led1-blue",
	};
	EXPORT_SYMBOL(pm860x_led_name);

	#define PM8606_BACKLIGHT_RESOURCE(_i, _x) \
	{ \
	.name = pm860x_backlight_name[_i], \
	.start = PM8606_##_x, \
	.end = PM8606_##_x, \
	.flags = IORESOURCE_IO, \
	}

	static struct resource backlight_resources[] = {
	PM8606_BACKLIGHT_RESOURCE(PM8606_BACKLIGHT1, WLED1A),
	PM8606_BACKLIGHT_RESOURCE(PM8606_BACKLIGHT2, WLED2A),
	PM8606_BACKLIGHT_RESOURCE(PM8606_BACKLIGHT3, WLED3A),
	};

	#define PM8606_BACKLIGHT_DEVS(_i) \
	{ \
	.name = "88pm860x-backlight", \
	.num_resources = 1, \
	.resources = &backlight_resources[_i], \
	.id = _i, \
	}

	static struct mfd_cell backlight_devs[] = {
	PM8606_BACKLIGHT_DEVS(PM8606_BACKLIGHT1),
	PM8606_BACKLIGHT_DEVS(PM8606_BACKLIGHT2),
	PM8606_BACKLIGHT_DEVS(PM8606_BACKLIGHT3),
	};

	#define PM8606_LED_RESOURCE(_i, _x) \
	{ \
	.name = pm860x_led_name[_i], \
	.start = PM8606_##_x, \
	.end = PM8606_##_x, \
	.flags = IORESOURCE_IO, \
	}

	static struct resource led_resources[] = {
	PM8606_LED_RESOURCE(PM8606_LED1_RED, RGB2B),
	PM8606_LED_RESOURCE(PM8606_LED1_GREEN, RGB2C),
	PM8606_LED_RESOURCE(PM8606_LED1_BLUE, RGB2D),
	PM8606_LED_RESOURCE(PM8606_LED2_RED, RGB1B),
	PM8606_LED_RESOURCE(PM8606_LED2_GREEN, RGB1C),
	PM8606_LED_RESOURCE(PM8606_LED2_BLUE, RGB1D),
	};

	#define PM8606_LED_DEVS(_i) \
	{ \
	.name = "88pm860x-led", \
	.num_resources = 1, \
	.resources = &led_resources[_i], \
	.id = _i, \
	}

	static struct mfd_cell led_devs[] = {
	PM8606_LED_DEVS(PM8606_LED1_RED),
	PM8606_LED_DEVS(PM8606_LED1_GREEN),
	PM8606_LED_DEVS(PM8606_LED1_BLUE),
	PM8606_LED_DEVS(PM8606_LED2_RED),
	PM8606_LED_DEVS(PM8606_LED2_GREEN),
	PM8606_LED_DEVS(PM8606_LED2_BLUE),
	};

	static struct resource touch_resources[] = {
	{
	.start = PM8607_IRQ_PEN,
	.end = PM8607_IRQ_PEN,
	.flags = IORESOURCE_IRQ,
	},
	};

	static struct mfd_cell touch_devs[] = {
	{
	.name = "88pm860x-touch",
	.num_resources = 1,
	.resources = &touch_resources[0],
	},
	};

	#define PM8607_REG_RESOURCE(_start, _end) \
	{ \
	.start = PM8607_##_start, \
	.end = PM8607_##_end, \
	.flags = IORESOURCE_IO, \
	}

	static struct resource regulator_resources[] = {
	PM8607_REG_RESOURCE(BUCK1, BUCK1),
	PM8607_REG_RESOURCE(BUCK2, BUCK2),
	PM8607_REG_RESOURCE(BUCK3, BUCK3),
	PM8607_REG_RESOURCE(LDO1, LDO1),
	PM8607_REG_RESOURCE(LDO2, LDO2),
	PM8607_REG_RESOURCE(LDO3, LDO3),
	PM8607_REG_RESOURCE(LDO4, LDO4),
	PM8607_REG_RESOURCE(LDO5, LDO5),
	PM8607_REG_RESOURCE(LDO6, LDO6),
	PM8607_REG_RESOURCE(LDO7, LDO7),
	PM8607_REG_RESOURCE(LDO8, LDO8),
	PM8607_REG_RESOURCE(LDO9, LDO9),
	PM8607_REG_RESOURCE(LDO10, LDO10),
	PM8607_REG_RESOURCE(LDO12, LDO12),
	PM8607_REG_RESOURCE(LDO14, LDO14),
	};

	#define PM8607_REG_DEVS(_name, _id) \
	{ \
	.name = "88pm8607-" #_name, \
	.num_resources = 1, \
	.resources = &regulator_resources[PM8607_ID_##_id], \
	.id = PM8607_ID_##_id, \
	}

	static struct mfd_cell regulator_devs[] = {
	PM8607_REG_DEVS(buck1, BUCK1),
	PM8607_REG_DEVS(buck2, BUCK2),
	PM8607_REG_DEVS(buck3, BUCK3),
	PM8607_REG_DEVS(ldo1, LDO1),
	PM8607_REG_DEVS(ldo2, LDO2),
	PM8607_REG_DEVS(ldo3, LDO3),
	PM8607_REG_DEVS(ldo4, LDO4),
	PM8607_REG_DEVS(ldo5, LDO5),
	PM8607_REG_DEVS(ldo6, LDO6),
	PM8607_REG_DEVS(ldo7, LDO7),
	PM8607_REG_DEVS(ldo8, LDO8),
	PM8607_REG_DEVS(ldo9, LDO9),
	PM8607_REG_DEVS(ldo10, LDO10),
	PM8607_REG_DEVS(ldo12, LDO12),
	PM8607_REG_DEVS(ldo14, LDO14),
	};

	#define CHECK_IRQ(irq) \
	do { \
	if ((irq < 0) \|\| (irq >= PM860X_NUM_IRQ)) \
	return -EINVAL; \
	} while (0)

	/* IRQs only occur on 88PM8607 */
	int pm860x_mask_irq(struct pm860x_chip *chip, int irq)
	{
	struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
	: chip->companion;
	int offset, data, ret;

	CHECK_IRQ(irq);

	offset = (irq >> 3) + PM8607_INT_MASK_1;
	data = 1 << (irq % 8);
	ret = pm860x_set_bits(i2c, offset, data, 0);

	return ret;
	}
	EXPORT_SYMBOL(pm860x_mask_irq);

	int pm860x_unmask_irq(struct pm860x_chip *chip, int irq)
	{
	struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
	: chip->companion;
	int offset, data, ret;

	CHECK_IRQ(irq);

	offset = (irq >> 3) + PM8607_INT_MASK_1;
	data = 1 << (irq % 8);
	ret = pm860x_set_bits(i2c, offset, data, data);

	return ret;
	}
	EXPORT_SYMBOL(pm860x_unmask_irq);

	#define INT_STATUS_NUM (3)

	static irqreturn_t pm8607_irq_thread(int irq, void *data)
	{
	DECLARE_BITMAP(irq_status, PM860X_NUM_IRQ);
	struct pm860x_chip *chip = data;
	struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
	: chip->companion;
	unsigned char status_buf[INT_STATUS_NUM << 1];
	unsigned long value;
	int i, ret;

	irq_status[0] = 0;

	/* read out status register */
	ret = pm860x_bulk_read(i2c, PM8607_INT_STATUS1,
	INT_STATUS_NUM << 1, status_buf);
	if (ret < 0)
	goto out;
	if (chip->irq_mode) {
	/* 0, clear by read. 1, clear by write */
	ret = pm860x_bulk_write(i2c, PM8607_INT_STATUS1,
	INT_STATUS_NUM, status_buf);
	if (ret < 0)
	goto out;
	}

	/* clear masked interrupt status */
	for (i = 0, value = 0; i < INT_STATUS_NUM; i++) {
	status_buf[i] &= status_buf[i + INT_STATUS_NUM];
	irq_status[0] \|= status_buf[i] << (i * 8);
	}

	while (!bitmap_empty(irq_status, PM860X_NUM_IRQ)) {
	irq = find_first_bit(irq_status, PM860X_NUM_IRQ);
	clear_bit(irq, irq_status);
	dev_dbg(chip->dev, "Servicing IRQ #%d\n", irq);

	mutex_lock(&chip->irq_lock);
	if (chip->irq[irq].handler)
	chip->irq[irq].handler(irq, chip->irq[irq].data);
	else {
	pm860x_mask_irq(chip, irq);
	dev_err(chip->dev, "Nobody cares IRQ %d. "
	"Now mask it.\n", irq);
	for (i = 0; i < (INT_STATUS_NUM << 1); i++) {
	dev_err(chip->dev, "status[%d]:%x\n", i,
	status_buf[i]);
	}
	}
	mutex_unlock(&chip->irq_lock);
	}
	out:
	return IRQ_HANDLED;
	}

	int pm860x_request_irq(struct pm860x_chip *chip, int irq,
	irq_handler_t handler, void *data)
	{
	CHECK_IRQ(irq);
	if (!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(pm860x_request_irq);

	int pm860x_free_irq(struct pm860x_chip *chip, int irq)
	{
	CHECK_IRQ(irq);

	mutex_lock(&chip->irq_lock);
	chip->irq[irq].handler = NULL;
	chip->irq[irq].data = NULL;
	mutex_unlock(&chip->irq_lock);

	return 0;
	}
	EXPORT_SYMBOL(pm860x_free_irq);

	static int __devinit device_gpadc_init(struct pm860x_chip *chip,
	struct pm860x_platform_data *pdata)
	{
	struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
	: chip->companion;
	int use_gpadc = 0, data, ret;

	/* initialize GPADC without activating it */

	if (pdata && pdata->touch) {
	/* set GPADC MISC1 register */
	data = 0;
	data \|= (pdata->touch->gpadc_prebias << 1)
	& PM8607_GPADC_PREBIAS_MASK;
	data \|= (pdata->touch->slot_cycle << 3)
	& PM8607_GPADC_SLOT_CYCLE_MASK;
	data \|= (pdata->touch->off_scale << 5)
	& PM8607_GPADC_OFF_SCALE_MASK;
	data \|= (pdata->touch->sw_cal << 7)
	& PM8607_GPADC_SW_CAL_MASK;
	if (data) {
	ret = pm860x_reg_write(i2c, PM8607_GPADC_MISC1, data);
	if (ret < 0)
	goto out;
	}
	/* set tsi prebias time */
	if (pdata->touch->tsi_prebias) {
	data = pdata->touch->tsi_prebias;
	ret = pm860x_reg_write(i2c, PM8607_TSI_PREBIAS, data);
	if (ret < 0)
	goto out;
	}
	/* set prebias & prechg time of pen detect */
	data = 0;
	data \|= pdata->touch->pen_prebias & PM8607_PD_PREBIAS_MASK;
	data \|= (pdata->touch->pen_prechg << 5)
	& PM8607_PD_PRECHG_MASK;
	if (data) {
	ret = pm860x_reg_write(i2c, PM8607_PD_PREBIAS, data);
	if (ret < 0)
	goto out;
	}

	use_gpadc = 1;
	}

	/* turn on GPADC */
	if (use_gpadc) {
	ret = pm860x_set_bits(i2c, PM8607_GPADC_MISC1,
	PM8607_GPADC_EN, PM8607_GPADC_EN);
	}
	out:
	return ret;
	}

	static int __devinit device_irq_init(struct pm860x_chip *chip,
	struct pm860x_platform_data *pdata)
	{
	struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
	: chip->companion;
	unsigned char status_buf[INT_STATUS_NUM];
	int data, mask, ret = -EINVAL;

	mutex_init(&chip->irq_lock);

	mask = PM8607_B0_MISC1_INV_INT \| PM8607_B0_MISC1_INT_CLEAR
	\| PM8607_B0_MISC1_INT_MASK;
	data = 0;
	chip->irq_mode = 0;
	if (pdata && pdata->irq_mode) {
	/*
	* irq_mode defines the way of clearing interrupt. If it's 1,
	* clear IRQ by write. Otherwise, clear it by read.
	* This control bit is valid from 88PM8607 B0 steping.
	*/
	data \|= PM8607_B0_MISC1_INT_CLEAR;
	chip->irq_mode = 1;
	}
	ret = pm860x_set_bits(i2c, PM8607_B0_MISC1, mask, data);
	if (ret < 0)
	goto out;

	/* mask all IRQs */
	memset(status_buf, 0, INT_STATUS_NUM);
	ret = pm860x_bulk_write(i2c, PM8607_INT_MASK_1,
	INT_STATUS_NUM, status_buf);
	if (ret < 0)
	goto out;

	if (chip->irq_mode) {
	/* clear interrupt status by write */
	memset(status_buf, 0xFF, INT_STATUS_NUM);
	ret = pm860x_bulk_write(i2c, PM8607_INT_STATUS1,
	INT_STATUS_NUM, status_buf);
	} else {
	/* clear interrupt status by read */
	ret = pm860x_bulk_read(i2c, PM8607_INT_STATUS1,
	INT_STATUS_NUM, status_buf);
	}
	if (ret < 0)
	goto out;

	memset(chip->irq, 0, sizeof(struct pm860x_irq) * PM860X_NUM_IRQ);

	ret = request_threaded_irq(i2c->irq, NULL, pm8607_irq_thread,
	IRQF_ONESHOT \| IRQF_TRIGGER_LOW,
	"88PM8607", chip);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to request IRQ #%d.\n", i2c->irq);
	goto out;
	}
	chip->chip_irq = i2c->irq;
	return 0;
	out:
	return ret;
	}

	static void __devexit device_irq_exit(struct pm860x_chip *chip)
	{
	if (chip->chip_irq >= 0)
	free_irq(chip->chip_irq, chip);
	}

	static void __devinit device_8606_init(struct pm860x_chip *chip,
	struct i2c_client *i2c,
	struct pm860x_platform_data *pdata)
	{
	int ret;

	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;
	}
	}

	if (pdata && pdata->led) {
	ret = mfd_add_devices(chip->dev, 0, &led_devs[0],
	ARRAY_SIZE(led_devs),
	&led_resources[0], 0);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to add led "
	"subdev\n");
	goto out_dev;
	}
	}
	return;
	out_dev:
	mfd_remove_devices(chip->dev);
	device_irq_exit(chip);
	}

	static void __devinit device_8607_init(struct pm860x_chip *chip,
	struct i2c_client *i2c,
	struct pm860x_platform_data *pdata)
	{
	int data, ret;

	ret = pm860x_reg_read(i2c, PM8607_CHIP_ID);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
	goto out;
	}
	if ((ret & PM8607_VERSION_MASK) == PM8607_VERSION)
	dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
	ret);
	else {
	dev_err(chip->dev, "Failed to detect Marvell 88PM8607. "
	"Chip ID: %02x\n", ret);
	goto out;
	}

	ret = pm860x_reg_read(i2c, PM8607_BUCK3);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
	goto out;
	}
	if (ret & PM8607_BUCK3_DOUBLE)
	chip->buck3_double = 1;

	ret = pm860x_reg_read(i2c, PM8607_B0_MISC1);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
	goto out;
	}

	if (pdata && (pdata->i2c_port == PI2C_PORT))
	data = PM8607_B0_MISC1_PI2C;
	else
	data = 0;
	ret = pm860x_set_bits(i2c, PM8607_B0_MISC1, PM8607_B0_MISC1_PI2C, data);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to access MISC1:%d\n", ret);
	goto out;
	}

	ret = device_gpadc_init(chip, pdata);
	if (ret < 0)
	goto out;

	ret = device_irq_init(chip, pdata);
	if (ret < 0)
	goto out;

	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_dev;
	}

	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_dev;
	}
	}
	return;
	out_dev:
	mfd_remove_devices(chip->dev);
	device_irq_exit(chip);
	out:
	return;
	}

	int pm860x_device_init(struct pm860x_chip *chip,
	struct pm860x_platform_data *pdata)
	{
	chip->chip_irq = -EINVAL;

	switch (chip->id) {
	case CHIP_PM8606:
	device_8606_init(chip, chip->client, pdata);
	break;
	case CHIP_PM8607:
	device_8607_init(chip, chip->client, pdata);
	break;
	}

	if (chip->companion) {
	switch (chip->id) {
	case CHIP_PM8607:
	device_8606_init(chip, chip->companion, pdata);
	break;
	case CHIP_PM8606:
	device_8607_init(chip, chip->companion, pdata);
	break;
	}
	}

	return 0;
	}

	void pm860x_device_exit(struct pm860x_chip *chip)
	{
	device_irq_exit(chip);
	mfd_remove_devices(chip->dev);
	}

	MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM860x");
	MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
	MODULE_LICENSE("GPL");