diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index f1d54a3..bdb5a00 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -31,6 +31,16 @@ config EXTCON_ADC_JACK
 	help
 	  Say Y here to enable extcon device driver based on ADC values.
 
+config EXTCON_MAX14577
+	tristate "MAX14577 EXTCON Support"
+	depends on MFD_MAX14577
+	select IRQ_DOMAIN
+	select REGMAP_I2C
+	help
+	  If you say yes here you get support for the MUIC device of
+	  Maxim MAX14577 PMIC. The MAX14577 MUIC is a USB port accessory
+	  detector and switch.
+
 config EXTCON_MAX77693
 	tristate "MAX77693 EXTCON Support"
 	depends on MFD_MAX77693 && INPUT
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
index 759fdae..43eccc0 100644
--- a/drivers/extcon/Makefile
+++ b/drivers/extcon/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_OF_EXTCON)		+= of_extcon.o
 obj-$(CONFIG_EXTCON)		+= extcon-class.o
 obj-$(CONFIG_EXTCON_GPIO)	+= extcon-gpio.o
 obj-$(CONFIG_EXTCON_ADC_JACK)	+= extcon-adc-jack.o
+obj-$(CONFIG_EXTCON_MAX14577)	+= extcon-max14577.o
 obj-$(CONFIG_EXTCON_MAX77693)	+= extcon-max77693.o
 obj-$(CONFIG_EXTCON_MAX8997)	+= extcon-max8997.o
 obj-$(CONFIG_EXTCON_ARIZONA)	+= extcon-arizona.o
diff --git a/drivers/extcon/extcon-max14577.c b/drivers/extcon/extcon-max14577.c
new file mode 100644
index 0000000..31e0109
--- /dev/null
+++ b/drivers/extcon/extcon-max14577.c
@@ -0,0 +1,806 @@
+/*
+ * extcon-max14577.c - MAX14577 extcon driver to support MAX14577 MUIC
+ *
+ * Copyright (C) 2013 Samsung Electrnoics
+ * Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/max14577.h>
+#include <linux/mfd/max14577-private.h>
+#include <linux/extcon.h>
+#include <linux/irqdomain.h>
+
+#define	DEV_NAME			"max14577-muic"
+#define	DELAY_MS_DEFAULT		17000		/* unit: millisecond */
+
+enum max14577_muic_adc_debounce_time {
+	ADC_DEBOUNCE_TIME_5MS = 0,
+	ADC_DEBOUNCE_TIME_10MS,
+	ADC_DEBOUNCE_TIME_25MS,
+	ADC_DEBOUNCE_TIME_38_62MS,
+};
+
+enum max14577_muic_status {
+	MAX14577_MUIC_STATUS1 = 0,
+	MAX14577_MUIC_STATUS2 = 1,
+	MAX14577_MUIC_STATUS_END,
+};
+
+struct max14577_muic_info {
+	struct device *dev;
+	struct max14577 *max14577;
+	struct extcon_dev *edev;
+	int prev_cable_type;
+	int prev_chg_type;
+	u8 status[MAX14577_MUIC_STATUS_END];
+
+	bool irq_adc;
+	bool irq_chg;
+	struct work_struct irq_work;
+	struct mutex mutex;
+
+	/*
+	 * Use delayed workqueue to detect cable state and then
+	 * notify cable state to notifiee/platform through uevent.
+	 * After completing the booting of platform, the extcon provider
+	 * driver should notify cable state to upper layer.
+	 */
+	struct delayed_work wq_detcable;
+
+	/*
+	 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+	 * h/w path of COMP2/COMN1 on CONTROL1 register.
+	 */
+	int path_usb;
+	int path_uart;
+};
+
+enum max14577_muic_cable_group {
+	MAX14577_CABLE_GROUP_ADC = 0,
+	MAX14577_CABLE_GROUP_CHG,
+	MAX14577_CABLE_GROUP_VBVOLT,
+};
+
+/**
+ * struct max14577_muic_irq
+ * @irq: the index of irq list of MUIC device.
+ * @name: the name of irq.
+ * @virq: the virtual irq to use irq domain
+ */
+struct max14577_muic_irq {
+	unsigned int irq;
+	const char *name;
+	unsigned int virq;
+};
+
+static struct max14577_muic_irq muic_irqs[] = {
+	{ MAX14577_IRQ_INT1_ADC,	"muic-ADC" },
+	{ MAX14577_IRQ_INT1_ADCLOW,	"muic-ADCLOW" },
+	{ MAX14577_IRQ_INT1_ADCERR,	"muic-ADCError" },
+	{ MAX14577_IRQ_INT2_CHGTYP,	"muic-CHGTYP" },
+	{ MAX14577_IRQ_INT2_CHGDETRUN,	"muic-CHGDETRUN" },
+	{ MAX14577_IRQ_INT2_DCDTMR,	"muic-DCDTMR" },
+	{ MAX14577_IRQ_INT2_DBCHG,	"muic-DBCHG" },
+	{ MAX14577_IRQ_INT2_VBVOLT,	"muic-VBVOLT" },
+};
+
+/* Define supported accessory type */
+enum max14577_muic_acc_type {
+	MAX14577_MUIC_ADC_GROUND = 0x0,
+	MAX14577_MUIC_ADC_SEND_END_BUTTON,
+	MAX14577_MUIC_ADC_REMOTE_S1_BUTTON,
+	MAX14577_MUIC_ADC_REMOTE_S2_BUTTON,
+	MAX14577_MUIC_ADC_REMOTE_S3_BUTTON,
+	MAX14577_MUIC_ADC_REMOTE_S4_BUTTON,
+	MAX14577_MUIC_ADC_REMOTE_S5_BUTTON,
+	MAX14577_MUIC_ADC_REMOTE_S6_BUTTON,
+	MAX14577_MUIC_ADC_REMOTE_S7_BUTTON,
+	MAX14577_MUIC_ADC_REMOTE_S8_BUTTON,
+	MAX14577_MUIC_ADC_REMOTE_S9_BUTTON,
+	MAX14577_MUIC_ADC_REMOTE_S10_BUTTON,
+	MAX14577_MUIC_ADC_REMOTE_S11_BUTTON,
+	MAX14577_MUIC_ADC_REMOTE_S12_BUTTON,
+	MAX14577_MUIC_ADC_RESERVED_ACC_1,
+	MAX14577_MUIC_ADC_RESERVED_ACC_2,
+	MAX14577_MUIC_ADC_RESERVED_ACC_3,
+	MAX14577_MUIC_ADC_RESERVED_ACC_4,
+	MAX14577_MUIC_ADC_RESERVED_ACC_5,
+	MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2,
+	MAX14577_MUIC_ADC_PHONE_POWERED_DEV,
+	MAX14577_MUIC_ADC_TTY_CONVERTER,
+	MAX14577_MUIC_ADC_UART_CABLE,
+	MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG,
+	MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF,
+	MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON,
+	MAX14577_MUIC_ADC_AV_CABLE_NOLOAD,
+	MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG,
+	MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF,
+	MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON,
+	MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */
+	MAX14577_MUIC_ADC_OPEN,
+};
+
+/* max14577 MUIC device support below list of accessories(external connector) */
+enum {
+	EXTCON_CABLE_USB = 0,
+	EXTCON_CABLE_TA,
+	EXTCON_CABLE_FAST_CHARGER,
+	EXTCON_CABLE_SLOW_CHARGER,
+	EXTCON_CABLE_CHARGE_DOWNSTREAM,
+	EXTCON_CABLE_JIG_USB_ON,
+	EXTCON_CABLE_JIG_USB_OFF,
+	EXTCON_CABLE_JIG_UART_OFF,
+	EXTCON_CABLE_JIG_UART_ON,
+
+	_EXTCON_CABLE_NUM,
+};
+
+static const char *max14577_extcon_cable[] = {
+	[EXTCON_CABLE_USB]			= "USB",
+	[EXTCON_CABLE_TA]			= "TA",
+	[EXTCON_CABLE_FAST_CHARGER]		= "Fast-charger",
+	[EXTCON_CABLE_SLOW_CHARGER]		= "Slow-charger",
+	[EXTCON_CABLE_CHARGE_DOWNSTREAM]	= "Charge-downstream",
+	[EXTCON_CABLE_JIG_USB_ON]		= "JIG-USB-ON",
+	[EXTCON_CABLE_JIG_USB_OFF]		= "JIG-USB-OFF",
+	[EXTCON_CABLE_JIG_UART_OFF]		= "JIG-UART-OFF",
+	[EXTCON_CABLE_JIG_UART_ON]		= "JIG-UART-ON",
+
+	NULL,
+};
+
+/*
+ * max14577_muic_set_debounce_time - Set the debounce time of ADC
+ * @info: the instance including private data of max14577 MUIC
+ * @time: the debounce time of ADC
+ */
+static int max14577_muic_set_debounce_time(struct max14577_muic_info *info,
+		enum max14577_muic_adc_debounce_time time)
+{
+	u8 ret;
+
+	switch (time) {
+	case ADC_DEBOUNCE_TIME_5MS:
+	case ADC_DEBOUNCE_TIME_10MS:
+	case ADC_DEBOUNCE_TIME_25MS:
+	case ADC_DEBOUNCE_TIME_38_62MS:
+		ret = max14577_update_reg(info->max14577->regmap,
+					  MAX14577_MUIC_REG_CONTROL3,
+					  CTRL3_ADCDBSET_MASK,
+					  time << CTRL3_ADCDBSET_SHIFT);
+		if (ret) {
+			dev_err(info->dev, "failed to set ADC debounce time\n");
+			return ret;
+		}
+		break;
+	default:
+		dev_err(info->dev, "invalid ADC debounce time\n");
+		return -EINVAL;
+	}
+
+	return 0;
+};
+
+/*
+ * max14577_muic_set_path - Set hardware line according to attached cable
+ * @info: the instance including private data of max14577 MUIC
+ * @value: the path according to attached cable
+ * @attached: the state of cable (true:attached, false:detached)
+ *
+ * The max14577 MUIC device share outside H/W line among a varity of cables
+ * so, this function set internal path of H/W line according to the type of
+ * attached cable.
+ */
+static int max14577_muic_set_path(struct max14577_muic_info *info,
+		u8 val, bool attached)
+{
+	int ret = 0;
+	u8 ctrl1, ctrl2 = 0;
+
+	/* Set open state to path before changing hw path */
+	ret = max14577_update_reg(info->max14577->regmap,
+				MAX14577_MUIC_REG_CONTROL1,
+				CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN);
+	if (ret < 0) {
+		dev_err(info->dev, "failed to update MUIC register\n");
+		return ret;
+	}
+
+	if (attached)
+		ctrl1 = val;
+	else
+		ctrl1 = CTRL1_SW_OPEN;
+
+	ret = max14577_update_reg(info->max14577->regmap,
+				MAX14577_MUIC_REG_CONTROL1,
+				CLEAR_IDBEN_MICEN_MASK, ctrl1);
+	if (ret < 0) {
+		dev_err(info->dev, "failed to update MUIC register\n");
+		return ret;
+	}
+
+	if (attached)
+		ctrl2 |= CTRL2_CPEN_MASK;	/* LowPwr=0, CPEn=1 */
+	else
+		ctrl2 |= CTRL2_LOWPWR_MASK;	/* LowPwr=1, CPEn=0 */
+
+	ret = max14577_update_reg(info->max14577->regmap,
+			MAX14577_REG_CONTROL2,
+			CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2);
+	if (ret < 0) {
+		dev_err(info->dev, "failed to update MUIC register\n");
+		return ret;
+	}
+
+	dev_dbg(info->dev,
+		"CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
+		ctrl1, ctrl2, attached ? "attached" : "detached");
+
+	return 0;
+}
+
+/*
+ * max14577_muic_get_cable_type - Return cable type and check cable state
+ * @info: the instance including private data of max14577 MUIC
+ * @group: the path according to attached cable
+ * @attached: store cable state and return
+ *
+ * This function check the cable state either attached or detached,
+ * and then divide precise type of cable according to cable group.
+ *	- max14577_CABLE_GROUP_ADC
+ *	- max14577_CABLE_GROUP_CHG
+ */
+static int max14577_muic_get_cable_type(struct max14577_muic_info *info,
+		enum max14577_muic_cable_group group, bool *attached)
+{
+	int cable_type = 0;
+	int adc;
+	int vbvolt;
+	int chg_type;
+
+	switch (group) {
+	case MAX14577_CABLE_GROUP_ADC:
+		/*
+		 * Read ADC value to check cable type and decide cable state
+		 * according to cable type
+		 */
+		adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK;
+		adc >>= STATUS1_ADC_SHIFT;
+
+		/*
+		 * Check current cable state/cable type and store cable type
+		 * (info->prev_cable_type) for handling cable when cable is
+		 * detached.
+		 */
+		if (adc == MAX14577_MUIC_ADC_OPEN) {
+			*attached = false;
+
+			cable_type = info->prev_cable_type;
+			info->prev_cable_type = MAX14577_MUIC_ADC_OPEN;
+		} else {
+			*attached = true;
+
+			cable_type = info->prev_cable_type = adc;
+		}
+		break;
+	case MAX14577_CABLE_GROUP_CHG:
+		/*
+		 * Read charger type to check cable type and decide cable state
+		 * according to type of charger cable.
+		 */
+		chg_type = info->status[MAX14577_MUIC_STATUS2] &
+			STATUS2_CHGTYP_MASK;
+		chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+		if (chg_type == MAX14577_CHARGER_TYPE_NONE) {
+			*attached = false;
+
+			cable_type = info->prev_chg_type;
+			info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE;
+		} else {
+			*attached = true;
+
+			/*
+			 * Check current cable state/cable type and store cable
+			 * type(info->prev_chg_type) for handling cable when
+			 * charger cable is detached.
+			 */
+			cable_type = info->prev_chg_type = chg_type;
+		}
+
+		break;
+	case MAX14577_CABLE_GROUP_VBVOLT:
+		/*
+		 * Read ADC value to check cable type and decide cable state
+		 * according to cable type
+		 */
+		adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK;
+		adc >>= STATUS1_ADC_SHIFT;
+		chg_type = info->status[MAX14577_MUIC_STATUS2] &
+			STATUS2_CHGTYP_MASK;
+		chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+		if (adc == MAX14577_MUIC_ADC_OPEN
+				&& chg_type == MAX14577_CHARGER_TYPE_NONE)
+			*attached = false;
+		else
+			*attached = true;
+
+		/*
+		 * Read vbvolt field, if vbvolt is 1,
+		 * this cable is used for charging.
+		 */
+		vbvolt = info->status[MAX14577_MUIC_STATUS2] &
+			STATUS2_VBVOLT_MASK;
+		vbvolt >>= STATUS2_VBVOLT_SHIFT;
+
+		cable_type = vbvolt;
+
+		break;
+	default:
+		dev_err(info->dev, "Unknown cable group (%d)\n", group);
+		cable_type = -EINVAL;
+		break;
+	}
+
+	return cable_type;
+}
+
+static int max14577_muic_jig_handler(struct max14577_muic_info *info,
+		int cable_type, bool attached)
+{
+	char cable_name[32];
+	int ret = 0;
+	int vbvolt;
+	bool unused;
+	u8 path = CTRL1_SW_OPEN;
+
+	vbvolt = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_VBVOLT,
+					      &unused);
+
+	dev_dbg(info->dev,
+		"external connector is %s (adc:0x%02x)\n",
+		attached ? "attached" : "detached", cable_type);
+
+	switch (cable_type) {
+	case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF:	/* ADC_JIG_USB_OFF */
+		/* PATH:AP_USB */
+		strcpy(cable_name, "JIG-USB-OFF");
+		path = CTRL1_SW_USB;
+		break;
+	case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON:	/* ADC_JIG_USB_ON */
+		/*
+		 * PATH:AP_USB
+		 * This ADC may happen also when USB cable (VBVolt on) is
+		 * attached with factory button set to D/L mode.
+		 * In this case the extcon_name must be "USB" for proper
+		 * hard-reset of device.
+		 */
+
+		if (vbvolt)
+			strcpy(cable_name, "USB");
+		else
+			strcpy(cable_name, "JIG-USB-ON");
+
+		path = CTRL1_SW_USB;
+		break;
+	case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF:	/* ADC_JIG_UART_OFF */
+		/* PATH:AP_UART */
+		strcpy(cable_name, "JIG-UART-OFF");
+		path = CTRL1_SW_UART;
+		break;
+	default:
+		dev_err(info->dev, "failed to detect %s jig cable\n",
+			attached ? "attached" : "detached");
+		return -EINVAL;
+	}
+
+	ret = max14577_muic_set_path(info, path, attached);
+	if (ret < 0)
+		return ret;
+
+	extcon_set_cable_state(info->edev, cable_name, attached);
+
+	return 0;
+}
+
+static int max14577_muic_adc_handler(struct max14577_muic_info *info)
+{
+	int cable_type;
+	bool attached;
+	int ret = 0;
+
+	/* Check accessory state which is either detached or attached */
+	cable_type = max14577_muic_get_cable_type(info,
+				MAX14577_CABLE_GROUP_ADC, &attached);
+
+	dev_dbg(info->dev,
+		"external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
+		attached ? "attached" : "detached", cable_type,
+		info->prev_cable_type);
+
+	switch (cable_type) {
+	case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF:
+	case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON:
+	case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF:
+		/* JIG */
+		ret = max14577_muic_jig_handler(info, cable_type, attached);
+		if (ret < 0)
+			return ret;
+		break;
+	case MAX14577_MUIC_ADC_GROUND:
+	case MAX14577_MUIC_ADC_SEND_END_BUTTON:
+	case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON:
+	case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON:
+	case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON:
+	case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON:
+	case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON:
+	case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON:
+	case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON:
+	case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON:
+	case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON:
+	case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON:
+	case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON:
+	case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON:
+	case MAX14577_MUIC_ADC_RESERVED_ACC_1:
+	case MAX14577_MUIC_ADC_RESERVED_ACC_2:
+	case MAX14577_MUIC_ADC_RESERVED_ACC_3:
+	case MAX14577_MUIC_ADC_RESERVED_ACC_4:
+	case MAX14577_MUIC_ADC_RESERVED_ACC_5:
+	case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2:
+	case MAX14577_MUIC_ADC_PHONE_POWERED_DEV:
+	case MAX14577_MUIC_ADC_TTY_CONVERTER:
+	case MAX14577_MUIC_ADC_UART_CABLE:
+	case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG:
+	case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD:
+	case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG:
+	case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON:
+	case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1:
+		/*
+		 * This accessory isn't used in general case if it is specially
+		 * needed to detect additional accessory, should implement
+		 * proper operation when this accessory is attached/detached.
+		 */
+		dev_info(info->dev,
+			"accessory is %s but it isn't used (adc:0x%x)\n",
+			attached ? "attached" : "detached", cable_type);
+		return -EAGAIN;
+	default:
+		dev_err(info->dev,
+			"failed to detect %s accessory (adc:0x%x)\n",
+			attached ? "attached" : "detached", cable_type);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int max14577_muic_chg_handler(struct max14577_muic_info *info)
+{
+	int chg_type;
+	bool attached;
+	int ret = 0;
+
+	chg_type = max14577_muic_get_cable_type(info,
+				MAX14577_CABLE_GROUP_CHG, &attached);
+
+	dev_dbg(info->dev,
+		"external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
+			attached ? "attached" : "detached",
+			chg_type, info->prev_chg_type);
+
+	switch (chg_type) {
+	case MAX14577_CHARGER_TYPE_USB:
+		/* PATH:AP_USB */
+		ret = max14577_muic_set_path(info, info->path_usb, attached);
+		if (ret < 0)
+			return ret;
+
+		extcon_set_cable_state(info->edev, "USB", attached);
+		break;
+	case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
+		extcon_set_cable_state(info->edev, "TA", attached);
+		break;
+	case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
+		extcon_set_cable_state(info->edev,
+				"Charge-downstream", attached);
+		break;
+	case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
+		extcon_set_cable_state(info->edev, "Slow-charger", attached);
+		break;
+	case MAX14577_CHARGER_TYPE_SPECIAL_1A:
+		extcon_set_cable_state(info->edev, "Fast-charger", attached);
+		break;
+	case MAX14577_CHARGER_TYPE_NONE:
+	case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
+		break;
+	default:
+		dev_err(info->dev,
+			"failed to detect %s accessory (chg_type:0x%x)\n",
+			attached ? "attached" : "detached", chg_type);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void max14577_muic_irq_work(struct work_struct *work)
+{
+	struct max14577_muic_info *info = container_of(work,
+			struct max14577_muic_info, irq_work);
+	int ret = 0;
+
+	if (!info->edev)
+		return;
+
+	mutex_lock(&info->mutex);
+
+	ret = max14577_bulk_read(info->max14577->regmap,
+			MAX14577_MUIC_REG_STATUS1, info->status, 2);
+	if (ret) {
+		dev_err(info->dev, "failed to read MUIC register\n");
+		mutex_unlock(&info->mutex);
+		return;
+	}
+
+	if (info->irq_adc) {
+		ret = max14577_muic_adc_handler(info);
+		info->irq_adc = false;
+	}
+	if (info->irq_chg) {
+		ret = max14577_muic_chg_handler(info);
+		info->irq_chg = false;
+	}
+
+	if (ret < 0)
+		dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+	mutex_unlock(&info->mutex);
+
+	return;
+}
+
+static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
+{
+	struct max14577_muic_info *info = data;
+	int i, irq_type = -1;
+
+	/*
+	 * We may be called multiple times for different nested IRQ-s.
+	 * Including changes in INT1_ADC and INT2_CGHTYP at once.
+	 * However we only need to know whether it was ADC, charger
+	 * or both interrupts so decode IRQ and turn on proper flags.
+	 */
+	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
+		if (irq == muic_irqs[i].virq)
+			irq_type = muic_irqs[i].irq;
+
+	switch (irq_type) {
+	case MAX14577_IRQ_INT1_ADC:
+	case MAX14577_IRQ_INT1_ADCLOW:
+	case MAX14577_IRQ_INT1_ADCERR:
+		/* Handle all of accessory except for
+		   type of charger accessory */
+		info->irq_adc = true;
+		break;
+	case MAX14577_IRQ_INT2_CHGTYP:
+	case MAX14577_IRQ_INT2_CHGDETRUN:
+	case MAX14577_IRQ_INT2_DCDTMR:
+	case MAX14577_IRQ_INT2_DBCHG:
+	case MAX14577_IRQ_INT2_VBVOLT:
+		/* Handle charger accessory */
+		info->irq_chg = true;
+		break;
+	default:
+		dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n",
+				irq_type);
+		return IRQ_HANDLED;
+	}
+	schedule_work(&info->irq_work);
+
+	return IRQ_HANDLED;
+}
+
+static int max14577_muic_detect_accessory(struct max14577_muic_info *info)
+{
+	int ret = 0;
+	int adc;
+	int chg_type;
+	bool attached;
+
+	mutex_lock(&info->mutex);
+
+	/* Read STATUSx register to detect accessory */
+	ret = max14577_bulk_read(info->max14577->regmap,
+			MAX14577_MUIC_REG_STATUS1, info->status, 2);
+	if (ret) {
+		dev_err(info->dev, "failed to read MUIC register\n");
+		mutex_unlock(&info->mutex);
+		return ret;
+	}
+
+	adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC,
+					&attached);
+	if (attached && adc != MAX14577_MUIC_ADC_OPEN) {
+		ret = max14577_muic_adc_handler(info);
+		if (ret < 0) {
+			dev_err(info->dev, "Cannot detect accessory\n");
+			mutex_unlock(&info->mutex);
+			return ret;
+		}
+	}
+
+	chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG,
+					&attached);
+	if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) {
+		ret = max14577_muic_chg_handler(info);
+		if (ret < 0) {
+			dev_err(info->dev, "Cannot detect charger accessory\n");
+			mutex_unlock(&info->mutex);
+			return ret;
+		}
+	}
+
+	mutex_unlock(&info->mutex);
+
+	return 0;
+}
+
+static void max14577_muic_detect_cable_wq(struct work_struct *work)
+{
+	struct max14577_muic_info *info = container_of(to_delayed_work(work),
+				struct max14577_muic_info, wq_detcable);
+
+	max14577_muic_detect_accessory(info);
+}
+
+static int max14577_muic_probe(struct platform_device *pdev)
+{
+	struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
+	struct max14577_muic_info *info;
+	int delay_jiffies;
+	int ret;
+	int i;
+	u8 id;
+
+	info = devm_kzalloc(&pdev->dev, sizeof(struct max14577_muic_info),
+				   GFP_KERNEL);
+	if (!info) {
+		dev_err(&pdev->dev, "failed to allocate memory\n");
+		return -ENOMEM;
+	}
+	info->dev = &pdev->dev;
+	info->max14577 = max14577;
+
+	platform_set_drvdata(pdev, info);
+	mutex_init(&info->mutex);
+
+	INIT_WORK(&info->irq_work, max14577_muic_irq_work);
+
+	/* Support irq domain for max14577 MUIC device */
+	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
+		struct max14577_muic_irq *muic_irq = &muic_irqs[i];
+		unsigned int virq = 0;
+
+		virq = irq_create_mapping(max14577->irq_domain, muic_irq->irq);
+		if (!virq) {
+			ret = -EINVAL;
+			goto err_irq;
+		}
+		muic_irq->virq = virq;
+
+		ret = request_threaded_irq(virq, NULL,
+				max14577_muic_irq_handler,
+				IRQF_NO_SUSPEND,
+				muic_irq->name, info);
+		if (ret) {
+			dev_err(&pdev->dev,
+				"failed: irq request (IRQ: %d,"
+				" error :%d)\n",
+				muic_irq->irq, ret);
+			goto err_irq;
+		}
+	}
+
+	/* Initialize extcon device */
+	info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
+				  GFP_KERNEL);
+	if (!info->edev) {
+		dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
+		ret = -ENOMEM;
+		goto err_irq;
+	}
+	info->edev->name = DEV_NAME;
+	info->edev->supported_cable = max14577_extcon_cable;
+	ret = extcon_dev_register(info->edev);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register extcon device\n");
+		goto err_irq;
+	}
+
+	/* Default h/w line path */
+	info->path_usb = CTRL1_SW_USB;
+	info->path_uart = CTRL1_SW_UART;
+	delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
+
+	/* Set initial path for UART */
+	max14577_muic_set_path(info, info->path_uart, true);
+
+	/* Check revision number of MUIC device*/
+	ret = max14577_read_reg(info->max14577->regmap,
+			MAX14577_REG_DEVICEID, &id);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to read revision number\n");
+		goto err_extcon;
+	}
+	dev_info(info->dev, "device ID : 0x%x\n", id);
+
+	/* Set ADC debounce time */
+	max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
+
+	/*
+	 * Detect accessory after completing the initialization of platform
+	 *
+	 * - Use delayed workqueue to detect cable state and then
+	 * notify cable state to notifiee/platform through uevent.
+	 * After completing the booting of platform, the extcon provider
+	 * driver should notify cable state to upper layer.
+	 */
+	INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq);
+	schedule_delayed_work(&info->wq_detcable, delay_jiffies);
+
+	return ret;
+
+err_extcon:
+	extcon_dev_unregister(info->edev);
+err_irq:
+	while (--i >= 0)
+		free_irq(muic_irqs[i].virq, info);
+	return ret;
+}
+
+static int max14577_muic_remove(struct platform_device *pdev)
+{
+	struct max14577_muic_info *info = platform_get_drvdata(pdev);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
+		free_irq(muic_irqs[i].virq, info);
+	cancel_work_sync(&info->irq_work);
+	extcon_dev_unregister(info->edev);
+
+	return 0;
+}
+
+static struct platform_driver max14577_muic_driver = {
+	.driver		= {
+		.name	= DEV_NAME,
+		.owner	= THIS_MODULE,
+	},
+	.probe		= max14577_muic_probe,
+	.remove		= max14577_muic_remove,
+};
+
+module_platform_driver(max14577_muic_driver);
+
+MODULE_DESCRIPTION("Maxim max14577 Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:extcon-max14577");
