Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 809 insertions, 0 deletions

diff --git a/drivers/extcon/extcon-max14577.c b/drivers/extcon/extcon-max14577.c
new file mode 100644
index 000000000..ace523924
--- /dev/null
+++ b/drivers/extcon/extcon-max14577.c
@@ -0,0 +1,809 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC
+//
+// Copyright (C) 2013,2014 Samsung Electronics
+// Chanwoo Choi <cw00.choi@samsung.com>
+// Krzysztof Kozlowski <krzk@kernel.org>
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/max14577.h>
+#include <linux/mfd/max14577-private.h>
+#include <linux/extcon-provider.h>
+
+#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_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 max14577_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" },
+};
+
+static struct max14577_muic_irq max77836_muic_irqs[] = {
+	{ MAX14577_IRQ_INT1_ADC,	"muic-ADC" },
+	{ MAX14577_IRQ_INT1_ADCLOW,	"muic-ADCLOW" },
+	{ MAX14577_IRQ_INT1_ADCERR,	"muic-ADCError" },
+	{ MAX77836_IRQ_INT1_ADC1K,	"muic-ADC1K" },
+	{ 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" },
+	{ MAX77836_IRQ_INT2_VIDRM,	"muic-VIDRM" },
+};
+
+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];
+
+	struct max14577_muic_irq *muic_irqs;
+	unsigned int muic_irqs_num;
+	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,
+};
+
+/* 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,
+};
+
+static const unsigned int max14577_extcon_cable[] = {
+	EXTCON_USB,
+	EXTCON_CHG_USB_SDP,
+	EXTCON_CHG_USB_DCP,
+	EXTCON_CHG_USB_FAST,
+	EXTCON_CHG_USB_SLOW,
+	EXTCON_CHG_USB_CDP,
+	EXTCON_JIG,
+	EXTCON_NONE,
+};
+
+/*
+ * 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)
+{
+	u8 ctrl1, ctrl2 = 0;
+	int ret;
+
+	/* 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 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;
+	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)
+{
+	int ret = 0;
+	u8 path = CTRL1_SW_OPEN;
+
+	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 */
+	case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON:	/* ADC_JIG_USB_ON */
+		/* PATH:AP_USB */
+		path = CTRL1_SW_USB;
+		break;
+	case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF:	/* ADC_JIG_UART_OFF */
+		/* PATH:AP_UART */
+		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_state_sync(info->edev, EXTCON_JIG, 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_state_sync(info->edev, EXTCON_USB, attached);
+		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+					attached);
+		break;
+	case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
+		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
+					attached);
+		break;
+	case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
+		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
+					attached);
+		break;
+	case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
+		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
+					attached);
+		break;
+	case MAX14577_CHARGER_TYPE_SPECIAL_1A:
+		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
+					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);
+}
+
+/*
+ * Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
+ * Returns 0 if irq_type does not match registered IRQ for this device type.
+ */
+static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type)
+{
+	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;
+		return 1;
+	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;
+		return 1;
+	default:
+		return 0;
+	}
+}
+
+/*
+ * Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
+ * Returns 0 if irq_type does not match registered IRQ for this device type.
+ */
+static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type)
+{
+	/* First check common max14577 interrupts */
+	if (max14577_parse_irq(info, irq_type))
+		return 1;
+
+	switch (irq_type) {
+	case MAX77836_IRQ_INT1_ADC1K:
+		info->irq_adc = true;
+		return 1;
+	case MAX77836_IRQ_INT2_VIDRM:
+		/* Handle charger accessory */
+		info->irq_chg = true;
+		return 1;
+	default:
+		return 0;
+	}
+}
+
+static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
+{
+	struct max14577_muic_info *info = data;
+	int i, irq_type = -1;
+	bool irq_parsed;
+
+	/*
+	 * 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 < info->muic_irqs_num; i++)
+		if (irq == info->muic_irqs[i].virq)
+			irq_type = info->muic_irqs[i].irq;
+
+	switch (info->max14577->dev_type) {
+	case MAXIM_DEVICE_TYPE_MAX77836:
+		irq_parsed = max77836_parse_irq(info, irq_type);
+		break;
+	case MAXIM_DEVICE_TYPE_MAX14577:
+	default:
+		irq_parsed = max14577_parse_irq(info, irq_type);
+		break;
+	}
+
+	if (!irq_parsed) {
+		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 cable_type;
+	bool attached;
+	int ret;
+	int i;
+	u8 id;
+
+	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		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);
+
+	switch (max14577->dev_type) {
+	case MAXIM_DEVICE_TYPE_MAX77836:
+		info->muic_irqs = max77836_muic_irqs;
+		info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs);
+		break;
+	case MAXIM_DEVICE_TYPE_MAX14577:
+	default:
+		info->muic_irqs = max14577_muic_irqs;
+		info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs);
+	}
+
+	/* Support irq domain for max14577 MUIC device */
+	for (i = 0; i < info->muic_irqs_num; i++) {
+		struct max14577_muic_irq *muic_irq = &info->muic_irqs[i];
+		int virq = 0;
+
+		virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq);
+		if (virq <= 0)
+			return -EINVAL;
+		muic_irq->virq = virq;
+
+		ret = devm_request_threaded_irq(&pdev->dev, 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);
+			return ret;
+		}
+	}
+
+	/* Initialize extcon device */
+	info->edev = devm_extcon_dev_allocate(&pdev->dev,
+					      max14577_extcon_cable);
+	if (IS_ERR(info->edev)) {
+		dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
+		return PTR_ERR(info->edev);
+	}
+
+	ret = devm_extcon_dev_register(&pdev->dev, info->edev);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register extcon device\n");
+		return ret;
+	}
+
+	/* 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 when JIG is connected to get serial logs */
+	ret = max14577_bulk_read(info->max14577->regmap,
+			MAX14577_MUIC_REG_STATUS1, info->status, 2);
+	if (ret) {
+		dev_err(info->dev, "Cannot read STATUS registers\n");
+		return ret;
+	}
+	cable_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC,
+					 &attached);
+	if (attached && cable_type == MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF)
+		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");
+		return ret;
+	}
+	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);
+	queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+			delay_jiffies);
+
+	return ret;
+}
+
+static int max14577_muic_remove(struct platform_device *pdev)
+{
+	struct max14577_muic_info *info = platform_get_drvdata(pdev);
+
+	cancel_work_sync(&info->irq_work);
+
+	return 0;
+}
+
+static const struct platform_device_id max14577_muic_id[] = {
+	{ "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, },
+	{ "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, max14577_muic_id);
+
+static const struct of_device_id of_max14577_muic_dt_match[] = {
+	{ .compatible = "maxim,max14577-muic",
+	  .data = (void *)MAXIM_DEVICE_TYPE_MAX14577, },
+	{ .compatible = "maxim,max77836-muic",
+	  .data = (void *)MAXIM_DEVICE_TYPE_MAX77836, },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, of_max14577_muic_dt_match);
+
+static struct platform_driver max14577_muic_driver = {
+	.driver		= {
+		.name	= "max14577-muic",
+		.of_match_table = of_max14577_muic_dt_match,
+	},
+	.probe		= max14577_muic_probe,
+	.remove		= max14577_muic_remove,
+	.id_table	= max14577_muic_id,
+};
+
+module_platform_driver(max14577_muic_driver);
+
+MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <krzk@kernel.org>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:extcon-max14577");