/*
   * Copyright (C) ST-Ericsson SA 2010
   *
   * License Terms: GNU General Public License v2
   * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
   * Author: Rabin Vincent <rabin.vincent@stericsson.com>

   * Author: Mattias Wallin <mattias.wallin@stericsson.com>

   */
  
  #include <linux/kernel.h>
  #include <linux/slab.h>
  #include <linux/init.h>
  #include <linux/irq.h>
  #include <linux/delay.h>
  #include <linux/interrupt.h>
  #include <linux/module.h>
  #include <linux/platform_device.h>
  #include <linux/mfd/core.h>

  #include <linux/mfd/abx500.h>

  #include <linux/mfd/abx500/ab8500.h>

  #include <linux/regulator/ab8500.h>

  
  /*
   * Interrupt register offsets
   * Bank : 0x0E
   */

  #define AB8500_IT_SOURCE1_REG		0x00
  #define AB8500_IT_SOURCE2_REG		0x01
  #define AB8500_IT_SOURCE3_REG		0x02
  #define AB8500_IT_SOURCE4_REG		0x03
  #define AB8500_IT_SOURCE5_REG		0x04
  #define AB8500_IT_SOURCE6_REG		0x05
  #define AB8500_IT_SOURCE7_REG		0x06
  #define AB8500_IT_SOURCE8_REG		0x07
  #define AB8500_IT_SOURCE19_REG		0x12
  #define AB8500_IT_SOURCE20_REG		0x13
  #define AB8500_IT_SOURCE21_REG		0x14
  #define AB8500_IT_SOURCE22_REG		0x15
  #define AB8500_IT_SOURCE23_REG		0x16
  #define AB8500_IT_SOURCE24_REG		0x17

  
  /*
   * latch registers
   */

  #define AB8500_IT_LATCH1_REG		0x20
  #define AB8500_IT_LATCH2_REG		0x21
  #define AB8500_IT_LATCH3_REG		0x22
  #define AB8500_IT_LATCH4_REG		0x23
  #define AB8500_IT_LATCH5_REG		0x24
  #define AB8500_IT_LATCH6_REG		0x25
  #define AB8500_IT_LATCH7_REG		0x26
  #define AB8500_IT_LATCH8_REG		0x27
  #define AB8500_IT_LATCH9_REG		0x28
  #define AB8500_IT_LATCH10_REG		0x29

  #define AB8500_IT_LATCH12_REG		0x2B

  #define AB8500_IT_LATCH19_REG		0x32
  #define AB8500_IT_LATCH20_REG		0x33
  #define AB8500_IT_LATCH21_REG		0x34
  #define AB8500_IT_LATCH22_REG		0x35
  #define AB8500_IT_LATCH23_REG		0x36
  #define AB8500_IT_LATCH24_REG		0x37

  
  /*
   * mask registers
   */

  #define AB8500_IT_MASK1_REG		0x40
  #define AB8500_IT_MASK2_REG		0x41
  #define AB8500_IT_MASK3_REG		0x42
  #define AB8500_IT_MASK4_REG		0x43
  #define AB8500_IT_MASK5_REG		0x44
  #define AB8500_IT_MASK6_REG		0x45
  #define AB8500_IT_MASK7_REG		0x46
  #define AB8500_IT_MASK8_REG		0x47
  #define AB8500_IT_MASK9_REG		0x48
  #define AB8500_IT_MASK10_REG		0x49
  #define AB8500_IT_MASK11_REG		0x4A
  #define AB8500_IT_MASK12_REG		0x4B
  #define AB8500_IT_MASK13_REG		0x4C
  #define AB8500_IT_MASK14_REG		0x4D
  #define AB8500_IT_MASK15_REG		0x4E
  #define AB8500_IT_MASK16_REG		0x4F
  #define AB8500_IT_MASK17_REG		0x50
  #define AB8500_IT_MASK18_REG		0x51
  #define AB8500_IT_MASK19_REG		0x52
  #define AB8500_IT_MASK20_REG		0x53
  #define AB8500_IT_MASK21_REG		0x54
  #define AB8500_IT_MASK22_REG		0x55
  #define AB8500_IT_MASK23_REG		0x56
  #define AB8500_IT_MASK24_REG		0x57
  
  #define AB8500_REV_REG			0x80

  #define AB8500_SWITCH_OFF_STATUS	0x00

  #define AB8500_TURN_ON_STATUS		0x00

  /*
   * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
   * numbers are indexed into this array with (num / 8).
   *
   * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
   * offset 0.
   */
  static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {

  	0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,

  };

  static int ab8500_get_chip_id(struct device *dev)
  {

  	struct ab8500 *ab8500;
  
  	if (!dev)
  		return -EINVAL;
  	ab8500 = dev_get_drvdata(dev->parent);
  	return ab8500 ? (int)ab8500->chip_id : -EINVAL;

  }
  
  static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
  	u8 reg, u8 data)

  {
  	int ret;

  	/*
  	 * Put the u8 bank and u8 register together into a an u16.
  	 * The bank on higher 8 bits and register in lower 8 bits.
  	 * */
  	u16 addr = ((u16)bank) << 8 | reg;

  
  	dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x
  ", addr, data);

  	ret = mutex_lock_interruptible(&ab8500->lock);
  	if (ret)
  		return ret;

  	ret = ab8500->write(ab8500, addr, data);
  	if (ret < 0)
  		dev_err(ab8500->dev, "failed to write reg %#x: %d
  ",
  			addr, ret);

  	mutex_unlock(&ab8500->lock);

  
  	return ret;
  }

  static int ab8500_set_register(struct device *dev, u8 bank,
  	u8 reg, u8 value)

  {

  	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);

  	return set_register_interruptible(ab8500, bank, reg, value);

  }

  static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
  	u8 reg, u8 *value)

  {
  	int ret;

  	/* put the u8 bank and u8 reg together into a an u16.
  	 * bank on higher 8 bits and reg in lower */
  	u16 addr = ((u16)bank) << 8 | reg;
  
  	ret = mutex_lock_interruptible(&ab8500->lock);
  	if (ret)
  		return ret;

  
  	ret = ab8500->read(ab8500, addr);
  	if (ret < 0)
  		dev_err(ab8500->dev, "failed to read reg %#x: %d
  ",
  			addr, ret);

  	else
  		*value = ret;

  	mutex_unlock(&ab8500->lock);

  	dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x
  ", addr, ret);
  
  	return ret;
  }

  static int ab8500_get_register(struct device *dev, u8 bank,
  	u8 reg, u8 *value)

  {

  	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);

  	return get_register_interruptible(ab8500, bank, reg, value);

  }

  
  static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
  	u8 reg, u8 bitmask, u8 bitvalues)

  {
  	int ret;

  	u8 data;
  	/* put the u8 bank and u8 reg together into a an u16.
  	 * bank on higher 8 bits and reg in lower */
  	u16 addr = ((u16)bank) << 8 | reg;

  	ret = mutex_lock_interruptible(&ab8500->lock);
  	if (ret)
  		return ret;

  	ret = ab8500->read(ab8500, addr);
  	if (ret < 0) {
  		dev_err(ab8500->dev, "failed to read reg %#x: %d
  ",
  			addr, ret);

  		goto out;

  	}

  	data = (u8)ret;
  	data = (~bitmask & data) | (bitmask & bitvalues);

  	ret = ab8500->write(ab8500, addr, data);
  	if (ret < 0)
  		dev_err(ab8500->dev, "failed to write reg %#x: %d
  ",
  			addr, ret);

  	dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x
  ", addr, data);

  out:
  	mutex_unlock(&ab8500->lock);
  	return ret;
  }

  
  static int ab8500_mask_and_set_register(struct device *dev,
  	u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
  {
  	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
  
  	return mask_and_set_register_interruptible(ab8500, bank, reg,
  		bitmask, bitvalues);
  
  }
  
  static struct abx500_ops ab8500_ops = {
  	.get_chip_id = ab8500_get_chip_id,
  	.get_register = ab8500_get_register,
  	.set_register = ab8500_set_register,
  	.get_register_page = NULL,
  	.set_register_page = NULL,
  	.mask_and_set_register = ab8500_mask_and_set_register,
  	.event_registers_startup_state_get = NULL,
  	.startup_irq_enabled = NULL,
  };

  static void ab8500_irq_lock(struct irq_data *data)

  {

  	struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);

  
  	mutex_lock(&ab8500->irq_lock);
  }

  static void ab8500_irq_sync_unlock(struct irq_data *data)

  {

  	struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);

  	int i;
  
  	for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
  		u8 old = ab8500->oldmask[i];
  		u8 new = ab8500->mask[i];
  		int reg;
  
  		if (new == old)
  			continue;

  		/* Interrupt register 12 doesn't exist prior to version 2.0 */
  		if (ab8500_irq_regoffset[i] == 11 &&
  			ab8500->chip_id < AB8500_CUT2P0)

  			continue;

  		ab8500->oldmask[i] = new;
  
  		reg = AB8500_IT_MASK1_REG + ab8500_irq_regoffset[i];

  		set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);

  	}
  
  	mutex_unlock(&ab8500->irq_lock);
  }

  static void ab8500_irq_mask(struct irq_data *data)

  {

  	struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
  	int offset = data->irq - ab8500->irq_base;

  	int index = offset / 8;
  	int mask = 1 << (offset % 8);
  
  	ab8500->mask[index] |= mask;
  }

  static void ab8500_irq_unmask(struct irq_data *data)

  {

  	struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
  	int offset = data->irq - ab8500->irq_base;

  	int index = offset / 8;
  	int mask = 1 << (offset % 8);
  
  	ab8500->mask[index] &= ~mask;
  }
  
  static struct irq_chip ab8500_irq_chip = {
  	.name			= "ab8500",

  	.irq_bus_lock		= ab8500_irq_lock,
  	.irq_bus_sync_unlock	= ab8500_irq_sync_unlock,
  	.irq_mask		= ab8500_irq_mask,

  	.irq_disable		= ab8500_irq_mask,

  	.irq_unmask		= ab8500_irq_unmask,

  };
  
  static irqreturn_t ab8500_irq(int irq, void *dev)
  {
  	struct ab8500 *ab8500 = dev;
  	int i;
  
  	dev_vdbg(ab8500->dev, "interrupt
  ");
  
  	for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
  		int regoffset = ab8500_irq_regoffset[i];
  		int status;

  		u8 value;

  		/* Interrupt register 12 doesn't exist prior to version 2.0 */
  		if (regoffset == 11 && ab8500->chip_id < AB8500_CUT2P0)

  			continue;

  		status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
  			AB8500_IT_LATCH1_REG + regoffset, &value);
  		if (status < 0 || value == 0)

  			continue;
  
  		do {

  			int bit = __ffs(value);

  			int line = i * 8 + bit;
  
  			handle_nested_irq(ab8500->irq_base + line);

  			value &= ~(1 << bit);
  		} while (value);

  	}
  
  	return IRQ_HANDLED;
  }
  
  static int ab8500_irq_init(struct ab8500 *ab8500)
  {
  	int base = ab8500->irq_base;
  	int irq;
  
  	for (irq = base; irq < base + AB8500_NR_IRQS; irq++) {

  		irq_set_chip_data(irq, ab8500);
  		irq_set_chip_and_handler(irq, &ab8500_irq_chip,

  					 handle_simple_irq);

  		irq_set_nested_thread(irq, 1);

  #ifdef CONFIG_ARM
  		set_irq_flags(irq, IRQF_VALID);
  #else

  		irq_set_noprobe(irq);

  #endif
  	}
  
  	return 0;
  }
  
  static void ab8500_irq_remove(struct ab8500 *ab8500)
  {
  	int base = ab8500->irq_base;
  	int irq;
  
  	for (irq = base; irq < base + AB8500_NR_IRQS; irq++) {
  #ifdef CONFIG_ARM
  		set_irq_flags(irq, 0);
  #endif

  		irq_set_chip_and_handler(irq, NULL, NULL);
  		irq_set_chip_data(irq, NULL);

  	}
  }

  static struct resource __devinitdata ab8500_gpio_resources[] = {

  	{
  		.name	= "GPIO_INT6",
  		.start	= AB8500_INT_GPIO6R,
  		.end	= AB8500_INT_GPIO41F,
  		.flags	= IORESOURCE_IRQ,
  	}
  };

  static struct resource __devinitdata ab8500_gpadc_resources[] = {

  	{
  		.name	= "HW_CONV_END",
  		.start	= AB8500_INT_GP_HW_ADC_CONV_END,
  		.end	= AB8500_INT_GP_HW_ADC_CONV_END,
  		.flags	= IORESOURCE_IRQ,
  	},
  	{
  		.name	= "SW_CONV_END",
  		.start	= AB8500_INT_GP_SW_ADC_CONV_END,
  		.end	= AB8500_INT_GP_SW_ADC_CONV_END,
  		.flags	= IORESOURCE_IRQ,
  	},
  };

  static struct resource __devinitdata ab8500_rtc_resources[] = {

  	{
  		.name	= "60S",
  		.start	= AB8500_INT_RTC_60S,
  		.end	= AB8500_INT_RTC_60S,
  		.flags	= IORESOURCE_IRQ,
  	},
  	{
  		.name	= "ALARM",
  		.start	= AB8500_INT_RTC_ALARM,
  		.end	= AB8500_INT_RTC_ALARM,
  		.flags	= IORESOURCE_IRQ,
  	},
  };

  static struct resource __devinitdata ab8500_poweronkey_db_resources[] = {

  	{
  		.name	= "ONKEY_DBF",
  		.start	= AB8500_INT_PON_KEY1DB_F,
  		.end	= AB8500_INT_PON_KEY1DB_F,
  		.flags	= IORESOURCE_IRQ,
  	},
  	{
  		.name	= "ONKEY_DBR",
  		.start	= AB8500_INT_PON_KEY1DB_R,
  		.end	= AB8500_INT_PON_KEY1DB_R,
  		.flags	= IORESOURCE_IRQ,
  	},
  };

  static struct resource __devinitdata ab8500_av_acc_detect_resources[] = {

  	{

  	       .name = "ACC_DETECT_1DB_F",
  	       .start = AB8500_INT_ACC_DETECT_1DB_F,
  	       .end = AB8500_INT_ACC_DETECT_1DB_F,
  	       .flags = IORESOURCE_IRQ,

  	},
  	{

  	       .name = "ACC_DETECT_1DB_R",
  	       .start = AB8500_INT_ACC_DETECT_1DB_R,
  	       .end = AB8500_INT_ACC_DETECT_1DB_R,
  	       .flags = IORESOURCE_IRQ,
  	},
  	{
  	       .name = "ACC_DETECT_21DB_F",
  	       .start = AB8500_INT_ACC_DETECT_21DB_F,
  	       .end = AB8500_INT_ACC_DETECT_21DB_F,
  	       .flags = IORESOURCE_IRQ,
  	},
  	{
  	       .name = "ACC_DETECT_21DB_R",
  	       .start = AB8500_INT_ACC_DETECT_21DB_R,
  	       .end = AB8500_INT_ACC_DETECT_21DB_R,
  	       .flags = IORESOURCE_IRQ,
  	},
  	{
  	       .name = "ACC_DETECT_22DB_F",
  	       .start = AB8500_INT_ACC_DETECT_22DB_F,
  	       .end = AB8500_INT_ACC_DETECT_22DB_F,
  	       .flags = IORESOURCE_IRQ,

  	},
  	{

  	       .name = "ACC_DETECT_22DB_R",
  	       .start = AB8500_INT_ACC_DETECT_22DB_R,
  	       .end = AB8500_INT_ACC_DETECT_22DB_R,
  	       .flags = IORESOURCE_IRQ,
  	},
  };
  
  static struct resource __devinitdata ab8500_charger_resources[] = {
  	{

  		.name = "MAIN_CH_UNPLUG_DET",
  		.start = AB8500_INT_MAIN_CH_UNPLUG_DET,
  		.end = AB8500_INT_MAIN_CH_UNPLUG_DET,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "MAIN_CHARGE_PLUG_DET",
  		.start = AB8500_INT_MAIN_CH_PLUG_DET,
  		.end = AB8500_INT_MAIN_CH_PLUG_DET,
  		.flags = IORESOURCE_IRQ,
  	},
  	{

  		.name = "VBUS_DET_R",
  		.start = AB8500_INT_VBUS_DET_R,
  		.end = AB8500_INT_VBUS_DET_R,
  		.flags = IORESOURCE_IRQ,
  	},
  	{

  		.name = "VBUS_DET_F",
  		.start = AB8500_INT_VBUS_DET_F,
  		.end = AB8500_INT_VBUS_DET_F,

  		.flags = IORESOURCE_IRQ,
  	},
  	{

  		.name = "USB_LINK_STATUS",
  		.start = AB8500_INT_USB_LINK_STATUS,
  		.end = AB8500_INT_USB_LINK_STATUS,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "USB_CHARGE_DET_DONE",
  		.start = AB8500_INT_USB_CHG_DET_DONE,
  		.end = AB8500_INT_USB_CHG_DET_DONE,

  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "VBUS_OVV",
  		.start = AB8500_INT_VBUS_OVV,
  		.end = AB8500_INT_VBUS_OVV,
  		.flags = IORESOURCE_IRQ,
  	},
  	{

  		.name = "USB_CH_TH_PROT_R",
  		.start = AB8500_INT_USB_CH_TH_PROT_R,
  		.end = AB8500_INT_USB_CH_TH_PROT_R,

  		.flags = IORESOURCE_IRQ,
  	},
  	{

  		.name = "USB_CH_TH_PROT_F",
  		.start = AB8500_INT_USB_CH_TH_PROT_F,
  		.end = AB8500_INT_USB_CH_TH_PROT_F,

  		.flags = IORESOURCE_IRQ,
  	},
  	{

  		.name = "MAIN_EXT_CH_NOT_OK",
  		.start = AB8500_INT_MAIN_EXT_CH_NOT_OK,
  		.end = AB8500_INT_MAIN_EXT_CH_NOT_OK,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "MAIN_CH_TH_PROT_R",
  		.start = AB8500_INT_MAIN_CH_TH_PROT_R,
  		.end = AB8500_INT_MAIN_CH_TH_PROT_R,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "MAIN_CH_TH_PROT_F",
  		.start = AB8500_INT_MAIN_CH_TH_PROT_F,
  		.end = AB8500_INT_MAIN_CH_TH_PROT_F,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "USB_CHARGER_NOT_OKR",
  		.start = AB8500_INT_USB_CHARGER_NOT_OK,
  		.end = AB8500_INT_USB_CHARGER_NOT_OK,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "USB_CHARGER_NOT_OKF",
  		.start = AB8500_INT_USB_CHARGER_NOT_OKF,
  		.end = AB8500_INT_USB_CHARGER_NOT_OKF,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "CH_WD_EXP",
  		.start = AB8500_INT_CH_WD_EXP,
  		.end = AB8500_INT_CH_WD_EXP,
  		.flags = IORESOURCE_IRQ,
  	},
  };
  
  static struct resource __devinitdata ab8500_btemp_resources[] = {
  	{
  		.name = "BAT_CTRL_INDB",
  		.start = AB8500_INT_BAT_CTRL_INDB,
  		.end = AB8500_INT_BAT_CTRL_INDB,

  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "BTEMP_LOW",
  		.start = AB8500_INT_BTEMP_LOW,
  		.end = AB8500_INT_BTEMP_LOW,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "BTEMP_HIGH",
  		.start = AB8500_INT_BTEMP_HIGH,
  		.end = AB8500_INT_BTEMP_HIGH,
  		.flags = IORESOURCE_IRQ,
  	},
  	{

  		.name = "BTEMP_LOW_MEDIUM",
  		.start = AB8500_INT_BTEMP_LOW_MEDIUM,
  		.end = AB8500_INT_BTEMP_LOW_MEDIUM,

  		.flags = IORESOURCE_IRQ,
  	},
  	{

  		.name = "BTEMP_MEDIUM_HIGH",
  		.start = AB8500_INT_BTEMP_MEDIUM_HIGH,
  		.end = AB8500_INT_BTEMP_MEDIUM_HIGH,

  		.flags = IORESOURCE_IRQ,
  	},

  };
  
  static struct resource __devinitdata ab8500_fg_resources[] = {

  	{

  		.name = "NCONV_ACCU",
  		.start = AB8500_INT_CCN_CONV_ACC,
  		.end = AB8500_INT_CCN_CONV_ACC,

  		.flags = IORESOURCE_IRQ,
  	},
  	{

  		.name = "BATT_OVV",
  		.start = AB8500_INT_BATT_OVV,
  		.end = AB8500_INT_BATT_OVV,

  		.flags = IORESOURCE_IRQ,
  	},
  	{

  		.name = "LOW_BAT_F",
  		.start = AB8500_INT_LOW_BAT_F,
  		.end = AB8500_INT_LOW_BAT_F,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "LOW_BAT_R",
  		.start = AB8500_INT_LOW_BAT_R,
  		.end = AB8500_INT_LOW_BAT_R,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "CC_INT_CALIB",
  		.start = AB8500_INT_CC_INT_CALIB,
  		.end = AB8500_INT_CC_INT_CALIB,

  		.flags = IORESOURCE_IRQ,
  	},
  };

  static struct resource __devinitdata ab8500_chargalg_resources[] = {};

  #ifdef CONFIG_DEBUG_FS

  static struct resource __devinitdata ab8500_debug_resources[] = {

  	{
  		.name	= "IRQ_FIRST",
  		.start	= AB8500_INT_MAIN_EXT_CH_NOT_OK,
  		.end	= AB8500_INT_MAIN_EXT_CH_NOT_OK,
  		.flags	= IORESOURCE_IRQ,
  	},
  	{
  		.name	= "IRQ_LAST",
  		.start	= AB8500_INT_USB_CHARGER_NOT_OKF,
  		.end	= AB8500_INT_USB_CHARGER_NOT_OKF,
  		.flags	= IORESOURCE_IRQ,
  	},
  };

  #endif

  static struct resource __devinitdata ab8500_usb_resources[] = {

  	{
  		.name = "ID_WAKEUP_R",
  		.start = AB8500_INT_ID_WAKEUP_R,
  		.end = AB8500_INT_ID_WAKEUP_R,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "ID_WAKEUP_F",
  		.start = AB8500_INT_ID_WAKEUP_F,
  		.end = AB8500_INT_ID_WAKEUP_F,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "VBUS_DET_F",
  		.start = AB8500_INT_VBUS_DET_F,
  		.end = AB8500_INT_VBUS_DET_F,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "VBUS_DET_R",
  		.start = AB8500_INT_VBUS_DET_R,
  		.end = AB8500_INT_VBUS_DET_R,
  		.flags = IORESOURCE_IRQ,
  	},

  	{
  		.name = "USB_LINK_STATUS",
  		.start = AB8500_INT_USB_LINK_STATUS,
  		.end = AB8500_INT_USB_LINK_STATUS,
  		.flags = IORESOURCE_IRQ,
  	},

  	{
  		.name = "USB_ADP_PROBE_PLUG",
  		.start = AB8500_INT_ADP_PROBE_PLUG,
  		.end = AB8500_INT_ADP_PROBE_PLUG,
  		.flags = IORESOURCE_IRQ,
  	},
  	{
  		.name = "USB_ADP_PROBE_UNPLUG",
  		.start = AB8500_INT_ADP_PROBE_UNPLUG,
  		.end = AB8500_INT_ADP_PROBE_UNPLUG,
  		.flags = IORESOURCE_IRQ,
  	},

  };

  static struct resource __devinitdata ab8500_temp_resources[] = {

  	{
  		.name  = "AB8500_TEMP_WARM",
  		.start = AB8500_INT_TEMP_WARM,
  		.end   = AB8500_INT_TEMP_WARM,
  		.flags = IORESOURCE_IRQ,
  	},
  };

  static struct mfd_cell __devinitdata ab8500_devs[] = {

  #ifdef CONFIG_DEBUG_FS
  	{
  		.name = "ab8500-debug",

  		.num_resources = ARRAY_SIZE(ab8500_debug_resources),
  		.resources = ab8500_debug_resources,

  	},
  #endif

  	{

  		.name = "ab8500-sysctrl",
  	},
  	{
  		.name = "ab8500-regulator",
  	},
  	{

  		.name = "ab8500-gpio",
  		.num_resources = ARRAY_SIZE(ab8500_gpio_resources),
  		.resources = ab8500_gpio_resources,
  	},
  	{

  		.name = "ab8500-gpadc",
  		.num_resources = ARRAY_SIZE(ab8500_gpadc_resources),
  		.resources = ab8500_gpadc_resources,
  	},
  	{
  		.name = "ab8500-rtc",
  		.num_resources = ARRAY_SIZE(ab8500_rtc_resources),
  		.resources = ab8500_rtc_resources,
  	},

  	{

  		.name = "ab8500-charger",
  		.num_resources = ARRAY_SIZE(ab8500_charger_resources),
  		.resources = ab8500_charger_resources,
  	},
  	{
  		.name = "ab8500-btemp",
  		.num_resources = ARRAY_SIZE(ab8500_btemp_resources),
  		.resources = ab8500_btemp_resources,
  	},
  	{
  		.name = "ab8500-fg",
  		.num_resources = ARRAY_SIZE(ab8500_fg_resources),
  		.resources = ab8500_fg_resources,
  	},
  	{
  		.name = "ab8500-chargalg",
  		.num_resources = ARRAY_SIZE(ab8500_chargalg_resources),
  		.resources = ab8500_chargalg_resources,
  	},
  	{
  		.name = "ab8500-acc-det",
  		.num_resources = ARRAY_SIZE(ab8500_av_acc_detect_resources),
  		.resources = ab8500_av_acc_detect_resources,
  	},
  	{
  		.name = "ab8500-codec",

  	},

  	{
  		.name = "ab8500-usb",
  		.num_resources = ARRAY_SIZE(ab8500_usb_resources),
  		.resources = ab8500_usb_resources,
  	},
  	{
  		.name = "ab8500-poweron-key",
  		.num_resources = ARRAY_SIZE(ab8500_poweronkey_db_resources),
  		.resources = ab8500_poweronkey_db_resources,
  	},
  	{

  		.name = "ab8500-pwm",
  		.id = 1,
  	},
  	{
  		.name = "ab8500-pwm",
  		.id = 2,
  	},
  	{
  		.name = "ab8500-pwm",
  		.id = 3,
  	},

  	{ .name = "ab8500-leds", },

  	{

  		.name = "ab8500-denc",
  	},
  	{
  		.name = "ab8500-temp",
  		.num_resources = ARRAY_SIZE(ab8500_temp_resources),
  		.resources = ab8500_temp_resources,

  	},

  };

  static ssize_t show_chip_id(struct device *dev,
  				struct device_attribute *attr, char *buf)
  {
  	struct ab8500 *ab8500;
  
  	ab8500 = dev_get_drvdata(dev);
  	return sprintf(buf, "%#x
  ", ab8500 ? ab8500->chip_id : -EINVAL);
  }

  /*
   * ab8500 has switched off due to (SWITCH_OFF_STATUS):
   * 0x01 Swoff bit programming
   * 0x02 Thermal protection activation
   * 0x04 Vbat lower then BattOk falling threshold
   * 0x08 Watchdog expired
   * 0x10 Non presence of 32kHz clock
   * 0x20 Battery level lower than power on reset threshold
   * 0x40 Power on key 1 pressed longer than 10 seconds
   * 0x80 DB8500 thermal shutdown
   */
  static ssize_t show_switch_off_status(struct device *dev,
  				struct device_attribute *attr, char *buf)
  {
  	int ret;
  	u8 value;
  	struct ab8500 *ab8500;
  
  	ab8500 = dev_get_drvdata(dev);
  	ret = get_register_interruptible(ab8500, AB8500_RTC,
  		AB8500_SWITCH_OFF_STATUS, &value);
  	if (ret < 0)
  		return ret;
  	return sprintf(buf, "%#x
  ", value);
  }

  /*
   * ab8500 has turned on due to (TURN_ON_STATUS):
   * 0x01 PORnVbat
   * 0x02 PonKey1dbF
   * 0x04 PonKey2dbF
   * 0x08 RTCAlarm
   * 0x10 MainChDet
   * 0x20 VbusDet
   * 0x40 UsbIDDetect
   * 0x80 Reserved
   */
  static ssize_t show_turn_on_status(struct device *dev,
  				struct device_attribute *attr, char *buf)
  {
  	int ret;
  	u8 value;
  	struct ab8500 *ab8500;
  
  	ab8500 = dev_get_drvdata(dev);
  	ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
  		AB8500_TURN_ON_STATUS, &value);
  	if (ret < 0)
  		return ret;
  	return sprintf(buf, "%#x
  ", value);
  }

  static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);

  static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);

  static DEVICE_ATTR(turn_on_status, S_IRUGO, show_turn_on_status, NULL);

  
  static struct attribute *ab8500_sysfs_entries[] = {
  	&dev_attr_chip_id.attr,

  	&dev_attr_switch_off_status.attr,

  	&dev_attr_turn_on_status.attr,

  	NULL,
  };
  
  static struct attribute_group ab8500_attr_group = {
  	.attrs	= ab8500_sysfs_entries,
  };

  int __devinit ab8500_init(struct ab8500 *ab8500)
  {
  	struct ab8500_platform_data *plat = dev_get_platdata(ab8500->dev);
  	int ret;
  	int i;

  	u8 value;

  
  	if (plat)
  		ab8500->irq_base = plat->irq_base;
  
  	mutex_init(&ab8500->lock);
  	mutex_init(&ab8500->irq_lock);

  	ret = get_register_interruptible(ab8500, AB8500_MISC,
  		AB8500_REV_REG, &value);

  	if (ret < 0)
  		return ret;

  	switch (value) {

  	case AB8500_CUT1P0:
  	case AB8500_CUT1P1:
  	case AB8500_CUT2P0:
  	case AB8500_CUT3P0:

  	case AB8500_CUT3P3:

  		dev_info(ab8500->dev, "detected chip, revision: %#x
  ", value);

  		break;
  	default:

  		dev_err(ab8500->dev, "unknown chip, revision: %#x
  ", value);

  		return -EINVAL;
  	}

  	ab8500->chip_id = value;

  	/*
  	 * ab8500 has switched off due to (SWITCH_OFF_STATUS):
  	 * 0x01 Swoff bit programming
  	 * 0x02 Thermal protection activation
  	 * 0x04 Vbat lower then BattOk falling threshold
  	 * 0x08 Watchdog expired
  	 * 0x10 Non presence of 32kHz clock
  	 * 0x20 Battery level lower than power on reset threshold
  	 * 0x40 Power on key 1 pressed longer than 10 seconds
  	 * 0x80 DB8500 thermal shutdown
  	 */
  
  	ret = get_register_interruptible(ab8500, AB8500_RTC,
  		AB8500_SWITCH_OFF_STATUS, &value);
  	if (ret < 0)
  		return ret;
  	dev_info(ab8500->dev, "switch off status: %#x", value);

  	if (plat && plat->init)
  		plat->init(ab8500);
  
  	/* Clear and mask all interrupts */

  	for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {

  		/* Interrupt register 12 doesn't exist prior to version 2.0 */
  		if (ab8500_irq_regoffset[i] == 11 &&
  			ab8500->chip_id < AB8500_CUT2P0)

  			continue;

  		get_register_interruptible(ab8500, AB8500_INTERRUPT,

  			AB8500_IT_LATCH1_REG + ab8500_irq_regoffset[i],
  			&value);

  		set_register_interruptible(ab8500, AB8500_INTERRUPT,

  			AB8500_IT_MASK1_REG + ab8500_irq_regoffset[i], 0xff);

  	}

  	ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
  	if (ret)
  		return ret;

  	for (i = 0; i < AB8500_NUM_IRQ_REGS; i++)
  		ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
  
  	if (ab8500->irq_base) {
  		ret = ab8500_irq_init(ab8500);
  		if (ret)
  			return ret;
  
  		ret = request_threaded_irq(ab8500->irq, NULL, ab8500_irq,

  					   IRQF_ONESHOT | IRQF_NO_SUSPEND,
  					   "ab8500", ab8500);

  		if (ret)
  			goto out_removeirq;
  	}

  	ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,

  			      ARRAY_SIZE(ab8500_devs), NULL,
  			      ab8500->irq_base);
  	if (ret)
  		goto out_freeirq;

  	ret = sysfs_create_group(&ab8500->dev->kobj, &ab8500_attr_group);
  	if (ret)
  		dev_err(ab8500->dev, "error creating sysfs entries
  ");

  	return ret;
  
  out_freeirq:
  	if (ab8500->irq_base) {
  		free_irq(ab8500->irq, ab8500);
  out_removeirq:
  		ab8500_irq_remove(ab8500);
  	}
  	return ret;
  }
  
  int __devexit ab8500_exit(struct ab8500 *ab8500)
  {

  	sysfs_remove_group(&ab8500->dev->kobj, &ab8500_attr_group);

  	mfd_remove_devices(ab8500->dev);
  	if (ab8500->irq_base) {
  		free_irq(ab8500->irq, ab8500);
  		ab8500_irq_remove(ab8500);
  	}
  
  	return 0;
  }

  MODULE_AUTHOR("Mattias Wallin, Srinidhi Kasagar, Rabin Vincent");

  MODULE_DESCRIPTION("AB8500 MFD core");
  MODULE_LICENSE("GPL v2");