drivers/mfd/88pm860x-core.c - arm/linux-arm64-legacy - 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/irq.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/88pm860x.h>

 #define INT_STATUS_NUM			3

 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, RGB1B),
 	PM8606_LED_RESOURCE(PM8606_LED1_GREEN, RGB1C),
 	PM8606_LED_RESOURCE(PM8606_LED1_BLUE, RGB1D),
 	PM8606_LED_RESOURCE(PM8606_LED2_RED, RGB2B),
 	PM8606_LED_RESOURCE(PM8606_LED2_GREEN, RGB2C),
 	PM8606_LED_RESOURCE(PM8606_LED2_BLUE, RGB2D),
 };

 #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 power_supply_resources[] = {
 	{
 		.name		= "88pm860x-power",
 		.start		= PM8607_IRQ_CHG,
 		.end		= PM8607_IRQ_CHG,
 		.flags		= IORESOURCE_IRQ,
 	},
 };

 static struct mfd_cell power_devs[] = {
 	{
 		.name		= "88pm860x-power",
 		.num_resources	= 1,
 		.resources	= &power_supply_resources[0],
 		.id		= -1,
 	},
 };

 static struct resource onkey_resources[] = {
 	{
 		.name		= "88pm860x-onkey",
 		.start		= PM8607_IRQ_ONKEY,
 		.end		= PM8607_IRQ_ONKEY,
 		.flags		= IORESOURCE_IRQ,
 	},
 };

 static struct mfd_cell onkey_devs[] = {
 	{
 		.name		= "88pm860x-onkey",
 		.num_resources	= 1,
 		.resources	= &onkey_resources[0],
 		.id		= -1,
 	},
 };

 static struct resource codec_resources[] = {
 	{
 		/* Headset microphone insertion or removal */
 		.name		= "micin",
 		.start		= PM8607_IRQ_MICIN,
 		.end		= PM8607_IRQ_MICIN,
 		.flags		= IORESOURCE_IRQ,
 	}, {
 		/* Hook-switch press or release */
 		.name		= "hook",
 		.start		= PM8607_IRQ_HOOK,
 		.end		= PM8607_IRQ_HOOK,
 		.flags		= IORESOURCE_IRQ,
 	}, {
 		/* Headset insertion or removal */
 		.name		= "headset",
 		.start		= PM8607_IRQ_HEADSET,
 		.end		= PM8607_IRQ_HEADSET,
 		.flags		= IORESOURCE_IRQ,
 	}, {
 		/* Audio short */
 		.name		= "audio-short",
 		.start		= PM8607_IRQ_AUDIO_SHORT,
 		.end		= PM8607_IRQ_AUDIO_SHORT,
 		.flags		= IORESOURCE_IRQ,
 	},
 };

 static struct mfd_cell codec_devs[] = {
 	{
 		.name		= "88pm860x-codec",
 		.num_resources	= ARRAY_SIZE(codec_resources),
 		.resources	= &codec_resources[0],
 		.id		= -1,
 	},
 };

 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(VIBRATOR_SET, VIBRATOR_SET),
 	PM8607_REG_RESOURCE(LDO14, LDO14),
 };

 #define PM8607_REG_DEVS(_id)						\
 {									\
 	.name		= "88pm860x-regulator",				\
 	.num_resources	= 1,						\
 	.resources	= &regulator_resources[PM8607_ID_##_id],	\
 	.id		= PM8607_ID_##_id,				\
 }

 static struct mfd_cell regulator_devs[] = {
 	PM8607_REG_DEVS(BUCK1),
 	PM8607_REG_DEVS(BUCK2),
 	PM8607_REG_DEVS(BUCK3),
 	PM8607_REG_DEVS(LDO1),
 	PM8607_REG_DEVS(LDO2),
 	PM8607_REG_DEVS(LDO3),
 	PM8607_REG_DEVS(LDO4),
 	PM8607_REG_DEVS(LDO5),
 	PM8607_REG_DEVS(LDO6),
 	PM8607_REG_DEVS(LDO7),
 	PM8607_REG_DEVS(LDO8),
 	PM8607_REG_DEVS(LDO9),
 	PM8607_REG_DEVS(LDO10),
 	PM8607_REG_DEVS(LDO12),
 	PM8607_REG_DEVS(LDO13),
 	PM8607_REG_DEVS(LDO14),
 };

 struct pm860x_irq_data {
 	int	reg;
 	int	mask_reg;
 	int	enable;		/* enable or not */
 	int	offs;		/* bit offset in mask register */
 };

 static struct pm860x_irq_data pm860x_irqs[] = {
 	[PM8607_IRQ_ONKEY] = {
 		.reg		= PM8607_INT_STATUS1,
 		.mask_reg	= PM8607_INT_MASK_1,
 		.offs		= 1 << 0,
 	},
 	[PM8607_IRQ_EXTON] = {
 		.reg		= PM8607_INT_STATUS1,
 		.mask_reg	= PM8607_INT_MASK_1,
 		.offs		= 1 << 1,
 	},
 	[PM8607_IRQ_CHG] = {
 		.reg		= PM8607_INT_STATUS1,
 		.mask_reg	= PM8607_INT_MASK_1,
 		.offs		= 1 << 2,
 	},
 	[PM8607_IRQ_BAT] = {
 		.reg		= PM8607_INT_STATUS1,
 		.mask_reg	= PM8607_INT_MASK_1,
 		.offs		= 1 << 3,
 	},
 	[PM8607_IRQ_RTC] = {
 		.reg		= PM8607_INT_STATUS1,
 		.mask_reg	= PM8607_INT_MASK_1,
 		.offs		= 1 << 4,
 	},
 	[PM8607_IRQ_CC] = {
 		.reg		= PM8607_INT_STATUS1,
 		.mask_reg	= PM8607_INT_MASK_1,
 		.offs		= 1 << 5,
 	},
 	[PM8607_IRQ_VBAT] = {
 		.reg		= PM8607_INT_STATUS2,
 		.mask_reg	= PM8607_INT_MASK_2,
 		.offs		= 1 << 0,
 	},
 	[PM8607_IRQ_VCHG] = {
 		.reg		= PM8607_INT_STATUS2,
 		.mask_reg	= PM8607_INT_MASK_2,
 		.offs		= 1 << 1,
 	},
 	[PM8607_IRQ_VSYS] = {
 		.reg		= PM8607_INT_STATUS2,
 		.mask_reg	= PM8607_INT_MASK_2,
 		.offs		= 1 << 2,
 	},
 	[PM8607_IRQ_TINT] = {
 		.reg		= PM8607_INT_STATUS2,
 		.mask_reg	= PM8607_INT_MASK_2,
 		.offs		= 1 << 3,
 	},
 	[PM8607_IRQ_GPADC0] = {
 		.reg		= PM8607_INT_STATUS2,
 		.mask_reg	= PM8607_INT_MASK_2,
 		.offs		= 1 << 4,
 	},
 	[PM8607_IRQ_GPADC1] = {
 		.reg		= PM8607_INT_STATUS2,
 		.mask_reg	= PM8607_INT_MASK_2,
 		.offs		= 1 << 5,
 	},
 	[PM8607_IRQ_GPADC2] = {
 		.reg		= PM8607_INT_STATUS2,
 		.mask_reg	= PM8607_INT_MASK_2,
 		.offs		= 1 << 6,
 	},
 	[PM8607_IRQ_GPADC3] = {
 		.reg		= PM8607_INT_STATUS2,
 		.mask_reg	= PM8607_INT_MASK_2,
 		.offs		= 1 << 7,
 	},
 	[PM8607_IRQ_AUDIO_SHORT] = {
 		.reg		= PM8607_INT_STATUS3,
 		.mask_reg	= PM8607_INT_MASK_3,
 		.offs		= 1 << 0,
 	},
 	[PM8607_IRQ_PEN] = {
 		.reg		= PM8607_INT_STATUS3,
 		.mask_reg	= PM8607_INT_MASK_3,
 		.offs		= 1 << 1,
 	},
 	[PM8607_IRQ_HEADSET] = {
 		.reg		= PM8607_INT_STATUS3,
 		.mask_reg	= PM8607_INT_MASK_3,
 		.offs		= 1 << 2,
 	},
 	[PM8607_IRQ_HOOK] = {
 		.reg		= PM8607_INT_STATUS3,
 		.mask_reg	= PM8607_INT_MASK_3,
 		.offs		= 1 << 3,
 	},
 	[PM8607_IRQ_MICIN] = {
 		.reg		= PM8607_INT_STATUS3,
 		.mask_reg	= PM8607_INT_MASK_3,
 		.offs		= 1 << 4,
 	},
 	[PM8607_IRQ_CHG_FAIL] = {
 		.reg		= PM8607_INT_STATUS3,
 		.mask_reg	= PM8607_INT_MASK_3,
 		.offs		= 1 << 5,
 	},
 	[PM8607_IRQ_CHG_DONE] = {
 		.reg		= PM8607_INT_STATUS3,
 		.mask_reg	= PM8607_INT_MASK_3,
 		.offs		= 1 << 6,
 	},
 	[PM8607_IRQ_CHG_FAULT] = {
 		.reg		= PM8607_INT_STATUS3,
 		.mask_reg	= PM8607_INT_MASK_3,
 		.offs		= 1 << 7,
 	},
 };

 static inline struct pm860x_irq_data *irq_to_pm860x(struct pm860x_chip *chip,
 						    int irq)
 {
 	return &pm860x_irqs[irq - chip->irq_base];
 }

 static irqreturn_t pm860x_irq(int irq, void *data)
 {
 	struct pm860x_chip *chip = data;
 	struct pm860x_irq_data *irq_data;
 	struct i2c_client *i2c;
 	int read_reg = -1, value = 0;
 	int i;

 	i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 	for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
 		irq_data = &pm860x_irqs[i];
 		if (read_reg != irq_data->reg) {
 			read_reg = irq_data->reg;
 			value = pm860x_reg_read(i2c, irq_data->reg);
 		}
 		if (value & irq_data->enable)
 			handle_nested_irq(chip->irq_base + i);
 	}
 	return IRQ_HANDLED;
 }

 static void pm860x_irq_lock(unsigned int irq)
 {
 	struct pm860x_chip *chip = get_irq_chip_data(irq);

 	mutex_lock(&chip->irq_lock);
 }

 static void pm860x_irq_sync_unlock(unsigned int irq)
 {
 	struct pm860x_chip *chip = get_irq_chip_data(irq);
 	struct pm860x_irq_data *irq_data;
 	struct i2c_client *i2c;
 	static unsigned char cached[3] = {0x0, 0x0, 0x0};
 	unsigned char mask[3];
 	int i;

 	i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 	/* Load cached value. In initial, all IRQs are masked */
 	for (i = 0; i < 3; i++)
 		mask[i] = cached[i];
 	for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
 		irq_data = &pm860x_irqs[i];
 		switch (irq_data->mask_reg) {
 		case PM8607_INT_MASK_1:
 			mask[0] &= ~irq_data->offs;
 			mask[0] |= irq_data->enable;
 			break;
 		case PM8607_INT_MASK_2:
 			mask[1] &= ~irq_data->offs;
 			mask[1] |= irq_data->enable;
 			break;
 		case PM8607_INT_MASK_3:
 			mask[2] &= ~irq_data->offs;
 			mask[2] |= irq_data->enable;
 			break;
 		default:
 			dev_err(chip->dev, "wrong IRQ\n");
 			break;
 		}
 	}
 	/* update mask into registers */
 	for (i = 0; i < 3; i++) {
 		if (mask[i] != cached[i]) {
 			cached[i] = mask[i];
 			pm860x_reg_write(i2c, PM8607_INT_MASK_1 + i, mask[i]);
 		}
 	}

 	mutex_unlock(&chip->irq_lock);
 }

 static void pm860x_irq_enable(unsigned int irq)
 {
 	struct pm860x_chip *chip = get_irq_chip_data(irq);
 	pm860x_irqs[irq - chip->irq_base].enable
 		= pm860x_irqs[irq - chip->irq_base].offs;
 }

 static void pm860x_irq_disable(unsigned int irq)
 {
 	struct pm860x_chip *chip = get_irq_chip_data(irq);
 	pm860x_irqs[irq - chip->irq_base].enable = 0;
 }

 static struct irq_chip pm860x_irq_chip = {
 	.name		= "88pm860x",
 	.bus_lock	= pm860x_irq_lock,
 	.bus_sync_unlock = pm860x_irq_sync_unlock,
 	.enable		= pm860x_irq_enable,
 	.disable	= pm860x_irq_disable,
 };

 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 data;
 	int ret;

 	/* initialize GPADC without activating it */

 	if (!pdata || !pdata->touch)
 		return -EINVAL;

 	/* 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;
 	}

 	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];
 	unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
 	struct irq_desc *desc;
 	int i, data, mask, ret = -EINVAL;
 	int __irq;

 	if (!pdata || !pdata->irq_base) {
 		dev_warn(chip->dev, "No interrupt support on IRQ base\n");
 		return -EINVAL;
 	}

 	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;

 	mutex_init(&chip->irq_lock);
 	chip->irq_base = pdata->irq_base;
 	chip->core_irq = i2c->irq;
 	if (!chip->core_irq)
 		goto out;

 	desc = irq_to_desc(chip->core_irq);

 	/* register IRQ by genirq */
 	for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
 		__irq = i + chip->irq_base;
 		set_irq_chip_data(__irq, chip);
 		set_irq_chip_and_handler(__irq, &pm860x_irq_chip,
 					 handle_edge_irq);
 		set_irq_nested_thread(__irq, 1);
 #ifdef CONFIG_ARM
 		set_irq_flags(__irq, IRQF_VALID);
 #else
 		set_irq_noprobe(__irq);
 #endif
 	}

 	ret = request_threaded_irq(chip->core_irq, NULL, pm860x_irq, flags,
 				   "88pm860x", chip);
 	if (ret) {
 		dev_err(chip->dev, "Failed to request IRQ: %d\n", ret);
 		chip->core_irq = 0;
 	}

 	return 0;
 out:
 	chip->core_irq = 0;
 	return ret;
 }

 static void device_irq_exit(struct pm860x_chip *chip)
 {
 	if (chip->core_irq)
 		free_irq(chip->core_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;
 		}
 	}

 	if (pdata && pdata->power) {
 		ret = mfd_add_devices(chip->dev, 0, &power_devs[0],
 				      ARRAY_SIZE(power_devs),
 				      &power_supply_resources[0], 0);
 		if (ret < 0) {
 			dev_err(chip->dev, "Failed to add power supply "
 				"subdev\n");
 			goto out_dev;
 		}
 	}

 	ret = mfd_add_devices(chip->dev, 0, &onkey_devs[0],
 			      ARRAY_SIZE(onkey_devs),
 			      &onkey_resources[0], 0);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to add onkey subdev\n");
 		goto out_dev;
 	}

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

 int __devinit pm860x_device_init(struct pm860x_chip *chip,
 		       struct pm860x_platform_data *pdata)
 {
 	chip->core_irq = 0;

 	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 __devexit 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/irq.h>
	#include <linux/interrupt.h>
	#include <linux/platform_device.h>
	#include <linux/mfd/core.h>
	#include <linux/mfd/88pm860x.h>

	#define INT_STATUS_NUM 3

	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, RGB1B),
	PM8606_LED_RESOURCE(PM8606_LED1_GREEN, RGB1C),
	PM8606_LED_RESOURCE(PM8606_LED1_BLUE, RGB1D),
	PM8606_LED_RESOURCE(PM8606_LED2_RED, RGB2B),
	PM8606_LED_RESOURCE(PM8606_LED2_GREEN, RGB2C),
	PM8606_LED_RESOURCE(PM8606_LED2_BLUE, RGB2D),
	};

	#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 power_supply_resources[] = {
	{
	.name = "88pm860x-power",
	.start = PM8607_IRQ_CHG,
	.end = PM8607_IRQ_CHG,
	.flags = IORESOURCE_IRQ,
	},
	};

	static struct mfd_cell power_devs[] = {
	{
	.name = "88pm860x-power",
	.num_resources = 1,
	.resources = &power_supply_resources[0],
	.id = -1,
	},
	};

	static struct resource onkey_resources[] = {
	{
	.name = "88pm860x-onkey",
	.start = PM8607_IRQ_ONKEY,
	.end = PM8607_IRQ_ONKEY,
	.flags = IORESOURCE_IRQ,
	},
	};

	static struct mfd_cell onkey_devs[] = {
	{
	.name = "88pm860x-onkey",
	.num_resources = 1,
	.resources = &onkey_resources[0],
	.id = -1,
	},
	};

	static struct resource codec_resources[] = {
	{
	/* Headset microphone insertion or removal */
	.name = "micin",
	.start = PM8607_IRQ_MICIN,
	.end = PM8607_IRQ_MICIN,
	.flags = IORESOURCE_IRQ,
	}, {
	/* Hook-switch press or release */
	.name = "hook",
	.start = PM8607_IRQ_HOOK,
	.end = PM8607_IRQ_HOOK,
	.flags = IORESOURCE_IRQ,
	}, {
	/* Headset insertion or removal */
	.name = "headset",
	.start = PM8607_IRQ_HEADSET,
	.end = PM8607_IRQ_HEADSET,
	.flags = IORESOURCE_IRQ,
	}, {
	/* Audio short */
	.name = "audio-short",
	.start = PM8607_IRQ_AUDIO_SHORT,
	.end = PM8607_IRQ_AUDIO_SHORT,
	.flags = IORESOURCE_IRQ,
	},
	};

	static struct mfd_cell codec_devs[] = {
	{
	.name = "88pm860x-codec",
	.num_resources = ARRAY_SIZE(codec_resources),
	.resources = &codec_resources[0],
	.id = -1,
	},
	};

	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(VIBRATOR_SET, VIBRATOR_SET),
	PM8607_REG_RESOURCE(LDO14, LDO14),
	};

	#define PM8607_REG_DEVS(_id) \
	{ \
	.name = "88pm860x-regulator", \
	.num_resources = 1, \
	.resources = &regulator_resources[PM8607_ID_##_id], \
	.id = PM8607_ID_##_id, \
	}

	static struct mfd_cell regulator_devs[] = {
	PM8607_REG_DEVS(BUCK1),
	PM8607_REG_DEVS(BUCK2),
	PM8607_REG_DEVS(BUCK3),
	PM8607_REG_DEVS(LDO1),
	PM8607_REG_DEVS(LDO2),
	PM8607_REG_DEVS(LDO3),
	PM8607_REG_DEVS(LDO4),
	PM8607_REG_DEVS(LDO5),
	PM8607_REG_DEVS(LDO6),
	PM8607_REG_DEVS(LDO7),
	PM8607_REG_DEVS(LDO8),
	PM8607_REG_DEVS(LDO9),
	PM8607_REG_DEVS(LDO10),
	PM8607_REG_DEVS(LDO12),
	PM8607_REG_DEVS(LDO13),
	PM8607_REG_DEVS(LDO14),
	};

	struct pm860x_irq_data {
	int reg;
	int mask_reg;
	int enable; /* enable or not */
	int offs; /* bit offset in mask register */
	};

	static struct pm860x_irq_data pm860x_irqs[] = {
	[PM8607_IRQ_ONKEY] = {
	.reg = PM8607_INT_STATUS1,
	.mask_reg = PM8607_INT_MASK_1,
	.offs = 1 << 0,
	},
	[PM8607_IRQ_EXTON] = {
	.reg = PM8607_INT_STATUS1,
	.mask_reg = PM8607_INT_MASK_1,
	.offs = 1 << 1,
	},
	[PM8607_IRQ_CHG] = {
	.reg = PM8607_INT_STATUS1,
	.mask_reg = PM8607_INT_MASK_1,
	.offs = 1 << 2,
	},
	[PM8607_IRQ_BAT] = {
	.reg = PM8607_INT_STATUS1,
	.mask_reg = PM8607_INT_MASK_1,
	.offs = 1 << 3,
	},
	[PM8607_IRQ_RTC] = {
	.reg = PM8607_INT_STATUS1,
	.mask_reg = PM8607_INT_MASK_1,
	.offs = 1 << 4,
	},
	[PM8607_IRQ_CC] = {
	.reg = PM8607_INT_STATUS1,
	.mask_reg = PM8607_INT_MASK_1,
	.offs = 1 << 5,
	},
	[PM8607_IRQ_VBAT] = {
	.reg = PM8607_INT_STATUS2,
	.mask_reg = PM8607_INT_MASK_2,
	.offs = 1 << 0,
	},
	[PM8607_IRQ_VCHG] = {
	.reg = PM8607_INT_STATUS2,
	.mask_reg = PM8607_INT_MASK_2,
	.offs = 1 << 1,
	},
	[PM8607_IRQ_VSYS] = {
	.reg = PM8607_INT_STATUS2,
	.mask_reg = PM8607_INT_MASK_2,
	.offs = 1 << 2,
	},
	[PM8607_IRQ_TINT] = {
	.reg = PM8607_INT_STATUS2,
	.mask_reg = PM8607_INT_MASK_2,
	.offs = 1 << 3,
	},
	[PM8607_IRQ_GPADC0] = {
	.reg = PM8607_INT_STATUS2,
	.mask_reg = PM8607_INT_MASK_2,
	.offs = 1 << 4,
	},
	[PM8607_IRQ_GPADC1] = {
	.reg = PM8607_INT_STATUS2,
	.mask_reg = PM8607_INT_MASK_2,
	.offs = 1 << 5,
	},
	[PM8607_IRQ_GPADC2] = {
	.reg = PM8607_INT_STATUS2,
	.mask_reg = PM8607_INT_MASK_2,
	.offs = 1 << 6,
	},
	[PM8607_IRQ_GPADC3] = {
	.reg = PM8607_INT_STATUS2,
	.mask_reg = PM8607_INT_MASK_2,
	.offs = 1 << 7,
	},
	[PM8607_IRQ_AUDIO_SHORT] = {
	.reg = PM8607_INT_STATUS3,
	.mask_reg = PM8607_INT_MASK_3,
	.offs = 1 << 0,
	},
	[PM8607_IRQ_PEN] = {
	.reg = PM8607_INT_STATUS3,
	.mask_reg = PM8607_INT_MASK_3,
	.offs = 1 << 1,
	},
	[PM8607_IRQ_HEADSET] = {
	.reg = PM8607_INT_STATUS3,
	.mask_reg = PM8607_INT_MASK_3,
	.offs = 1 << 2,
	},
	[PM8607_IRQ_HOOK] = {
	.reg = PM8607_INT_STATUS3,
	.mask_reg = PM8607_INT_MASK_3,
	.offs = 1 << 3,
	},
	[PM8607_IRQ_MICIN] = {
	.reg = PM8607_INT_STATUS3,
	.mask_reg = PM8607_INT_MASK_3,
	.offs = 1 << 4,
	},
	[PM8607_IRQ_CHG_FAIL] = {
	.reg = PM8607_INT_STATUS3,
	.mask_reg = PM8607_INT_MASK_3,
	.offs = 1 << 5,
	},
	[PM8607_IRQ_CHG_DONE] = {
	.reg = PM8607_INT_STATUS3,
	.mask_reg = PM8607_INT_MASK_3,
	.offs = 1 << 6,
	},
	[PM8607_IRQ_CHG_FAULT] = {
	.reg = PM8607_INT_STATUS3,
	.mask_reg = PM8607_INT_MASK_3,
	.offs = 1 << 7,
	},
	};

	static inline struct pm860x_irq_data irq_to_pm860x(struct pm860x_chip chip,
	int irq)
	{
	return &pm860x_irqs[irq - chip->irq_base];
	}

	static irqreturn_t pm860x_irq(int irq, void *data)
	{
	struct pm860x_chip *chip = data;
	struct pm860x_irq_data *irq_data;
	struct i2c_client *i2c;
	int read_reg = -1, value = 0;
	int i;

	i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
	for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
	irq_data = &pm860x_irqs[i];
	if (read_reg != irq_data->reg) {
	read_reg = irq_data->reg;
	value = pm860x_reg_read(i2c, irq_data->reg);
	}
	if (value & irq_data->enable)
	handle_nested_irq(chip->irq_base + i);
	}
	return IRQ_HANDLED;
	}

	static void pm860x_irq_lock(unsigned int irq)
	{
	struct pm860x_chip *chip = get_irq_chip_data(irq);

	mutex_lock(&chip->irq_lock);
	}

	static void pm860x_irq_sync_unlock(unsigned int irq)
	{
	struct pm860x_chip *chip = get_irq_chip_data(irq);
	struct pm860x_irq_data *irq_data;
	struct i2c_client *i2c;
	static unsigned char cached[3] = {0x0, 0x0, 0x0};
	unsigned char mask[3];
	int i;

	i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
	/* Load cached value. In initial, all IRQs are masked */
	for (i = 0; i < 3; i++)
	mask[i] = cached[i];
	for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
	irq_data = &pm860x_irqs[i];
	switch (irq_data->mask_reg) {
	case PM8607_INT_MASK_1:
	mask[0] &= ~irq_data->offs;
	mask[0] \|= irq_data->enable;
	break;
	case PM8607_INT_MASK_2:
	mask[1] &= ~irq_data->offs;
	mask[1] \|= irq_data->enable;
	break;
	case PM8607_INT_MASK_3:
	mask[2] &= ~irq_data->offs;
	mask[2] \|= irq_data->enable;
	break;
	default:
	dev_err(chip->dev, "wrong IRQ\n");
	break;
	}
	}
	/* update mask into registers */
	for (i = 0; i < 3; i++) {
	if (mask[i] != cached[i]) {
	cached[i] = mask[i];
	pm860x_reg_write(i2c, PM8607_INT_MASK_1 + i, mask[i]);
	}
	}

	mutex_unlock(&chip->irq_lock);
	}

	static void pm860x_irq_enable(unsigned int irq)
	{
	struct pm860x_chip *chip = get_irq_chip_data(irq);
	pm860x_irqs[irq - chip->irq_base].enable
	= pm860x_irqs[irq - chip->irq_base].offs;
	}

	static void pm860x_irq_disable(unsigned int irq)
	{
	struct pm860x_chip *chip = get_irq_chip_data(irq);
	pm860x_irqs[irq - chip->irq_base].enable = 0;
	}

	static struct irq_chip pm860x_irq_chip = {
	.name = "88pm860x",
	.bus_lock = pm860x_irq_lock,
	.bus_sync_unlock = pm860x_irq_sync_unlock,
	.enable = pm860x_irq_enable,
	.disable = pm860x_irq_disable,
	};

	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 data;
	int ret;

	/* initialize GPADC without activating it */

	if (!pdata \|\| !pdata->touch)
	return -EINVAL;

	/* 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;
	}

	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];
	unsigned long flags = IRQF_TRIGGER_FALLING \| IRQF_ONESHOT;
	struct irq_desc *desc;
	int i, data, mask, ret = -EINVAL;
	int __irq;

	if (!pdata \|\| !pdata->irq_base) {
	dev_warn(chip->dev, "No interrupt support on IRQ base\n");
	return -EINVAL;
	}

	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;

	mutex_init(&chip->irq_lock);
	chip->irq_base = pdata->irq_base;
	chip->core_irq = i2c->irq;
	if (!chip->core_irq)
	goto out;

	desc = irq_to_desc(chip->core_irq);

	/* register IRQ by genirq */
	for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
	__irq = i + chip->irq_base;
	set_irq_chip_data(__irq, chip);
	set_irq_chip_and_handler(__irq, &pm860x_irq_chip,
	handle_edge_irq);
	set_irq_nested_thread(__irq, 1);
	#ifdef CONFIG_ARM
	set_irq_flags(__irq, IRQF_VALID);
	#else
	set_irq_noprobe(__irq);
	#endif
	}

	ret = request_threaded_irq(chip->core_irq, NULL, pm860x_irq, flags,
	"88pm860x", chip);
	if (ret) {
	dev_err(chip->dev, "Failed to request IRQ: %d\n", ret);
	chip->core_irq = 0;
	}

	return 0;
	out:
	chip->core_irq = 0;
	return ret;
	}

	static void device_irq_exit(struct pm860x_chip *chip)
	{
	if (chip->core_irq)
	free_irq(chip->core_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;
	}
	}

	if (pdata && pdata->power) {
	ret = mfd_add_devices(chip->dev, 0, &power_devs[0],
	ARRAY_SIZE(power_devs),
	&power_supply_resources[0], 0);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to add power supply "
	"subdev\n");
	goto out_dev;
	}
	}

	ret = mfd_add_devices(chip->dev, 0, &onkey_devs[0],
	ARRAY_SIZE(onkey_devs),
	&onkey_resources[0], 0);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to add onkey subdev\n");
	goto out_dev;
	}

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

	int __devinit pm860x_device_init(struct pm860x_chip *chip,
	struct pm860x_platform_data *pdata)
	{
	chip->core_irq = 0;

	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 __devexit 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");