Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 711 insertions, 0 deletions

diff --git a/drivers/extcon/extcon-rt8973a.c b/drivers/extcon/extcon-rt8973a.c
new file mode 100644
index 000000000..19bb49f13
--- /dev/null
+++ b/drivers/extcon/extcon-rt8973a.c
@@ -0,0 +1,711 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * extcon-rt8973a.c - Richtek RT8973A extcon driver to support USB switches
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/extcon-provider.h>
+
+#include "extcon-rt8973a.h"
+
+#define	DELAY_MS_DEFAULT		20000	/* unit: millisecond */
+
+struct muic_irq {
+	unsigned int irq;
+	const char *name;
+	unsigned int virq;
+};
+
+struct reg_data {
+	u8 reg;
+	u8 mask;
+	u8 val;
+	bool invert;
+};
+
+struct rt8973a_muic_info {
+	struct device *dev;
+	struct extcon_dev *edev;
+
+	struct i2c_client *i2c;
+	struct regmap *regmap;
+
+	struct regmap_irq_chip_data *irq_data;
+	struct muic_irq *muic_irqs;
+	unsigned int num_muic_irqs;
+	int irq;
+	bool irq_attach;
+	bool irq_detach;
+	bool irq_ovp;
+	bool irq_otp;
+	struct work_struct irq_work;
+
+	struct reg_data *reg_data;
+	unsigned int num_reg_data;
+	bool auto_config;
+
+	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 value of RT8973A register to bring up MUIC device. */
+static struct reg_data rt8973a_reg_data[] = {
+	{
+		.reg = RT8973A_REG_CONTROL1,
+		.mask = RT8973A_REG_CONTROL1_ADC_EN_MASK
+			| RT8973A_REG_CONTROL1_USB_CHD_EN_MASK
+			| RT8973A_REG_CONTROL1_CHGTYP_MASK
+			| RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK
+			| RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK
+			| RT8973A_REG_CONTROL1_INTM_MASK,
+		.val = RT8973A_REG_CONTROL1_ADC_EN_MASK
+			| RT8973A_REG_CONTROL1_USB_CHD_EN_MASK
+			| RT8973A_REG_CONTROL1_CHGTYP_MASK,
+		.invert = false,
+	},
+	{ /* sentinel */ }
+};
+
+/* List of detectable cables */
+static const unsigned int rt8973a_extcon_cable[] = {
+	EXTCON_USB,
+	EXTCON_USB_HOST,
+	EXTCON_CHG_USB_SDP,
+	EXTCON_CHG_USB_DCP,
+	EXTCON_JIG,
+	EXTCON_NONE,
+};
+
+/* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */
+enum rt8973a_event_type {
+	RT8973A_EVENT_ATTACH = 1,
+	RT8973A_EVENT_DETACH,
+	RT8973A_EVENT_OVP,
+	RT8973A_EVENT_OTP,
+};
+
+/* Define supported accessory type */
+enum rt8973a_muic_acc_type {
+	RT8973A_MUIC_ADC_OTG = 0x0,
+	RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON,
+	RT8973A_MUIC_ADC_RESERVED_ACC_1,
+	RT8973A_MUIC_ADC_RESERVED_ACC_2,
+	RT8973A_MUIC_ADC_RESERVED_ACC_3,
+	RT8973A_MUIC_ADC_RESERVED_ACC_4,
+	RT8973A_MUIC_ADC_RESERVED_ACC_5,
+	RT8973A_MUIC_ADC_AUDIO_TYPE2,
+	RT8973A_MUIC_ADC_PHONE_POWERED_DEV,
+	RT8973A_MUIC_ADC_UNKNOWN_ACC_1,
+	RT8973A_MUIC_ADC_UNKNOWN_ACC_2,
+	RT8973A_MUIC_ADC_TA,
+	RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
+	RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
+	RT8973A_MUIC_ADC_UNKNOWN_ACC_3,
+	RT8973A_MUIC_ADC_UNKNOWN_ACC_4,
+	RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
+	RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
+	RT8973A_MUIC_ADC_UNKNOWN_ACC_5,
+	RT8973A_MUIC_ADC_OPEN = 0x1f,
+
+	/*
+	 * The below accessories has same ADC value (0x1f).
+	 * So, Device type1 is used to separate specific accessory.
+	 */
+					/* |---------|--ADC| */
+					/* |    [7:5]|[4:0]| */
+	RT8973A_MUIC_ADC_USB = 0x3f,	/* |      001|11111| */
+};
+
+/* List of supported interrupt for RT8973A */
+static struct muic_irq rt8973a_muic_irqs[] = {
+	{ RT8973A_INT1_ATTACH,		"muic-attach" },
+	{ RT8973A_INT1_DETACH,		"muic-detach" },
+	{ RT8973A_INT1_CHGDET,		"muic-chgdet" },
+	{ RT8973A_INT1_DCD_T,		"muic-dcd-t" },
+	{ RT8973A_INT1_OVP,		"muic-ovp" },
+	{ RT8973A_INT1_CONNECT,		"muic-connect" },
+	{ RT8973A_INT1_ADC_CHG,		"muic-adc-chg" },
+	{ RT8973A_INT1_OTP,		"muic-otp" },
+	{ RT8973A_INT2_UVLO,		"muic-uvlo" },
+	{ RT8973A_INT2_POR,		"muic-por" },
+	{ RT8973A_INT2_OTP_FET,		"muic-otp-fet" },
+	{ RT8973A_INT2_OVP_FET,		"muic-ovp-fet" },
+	{ RT8973A_INT2_OCP_LATCH,	"muic-ocp-latch" },
+	{ RT8973A_INT2_OCP,		"muic-ocp" },
+	{ RT8973A_INT2_OVP_OCP,		"muic-ovp-ocp" },
+};
+
+/* Define interrupt list of RT8973A to register regmap_irq */
+static const struct regmap_irq rt8973a_irqs[] = {
+	/* INT1 interrupts */
+	{ .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, },
+
+	/* INT2 interrupts */
+	{ .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,},
+	{ .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, },
+	{ .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, },
+	{ .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, },
+	{ .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, },
+	{ .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, },
+	{ .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, },
+};
+
+static const struct regmap_irq_chip rt8973a_muic_irq_chip = {
+	.name			= "rt8973a",
+	.status_base		= RT8973A_REG_INT1,
+	.mask_base		= RT8973A_REG_INTM1,
+	.num_regs		= 2,
+	.irqs			= rt8973a_irqs,
+	.num_irqs		= ARRAY_SIZE(rt8973a_irqs),
+};
+
+/* Define regmap configuration of RT8973A for I2C communication  */
+static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case RT8973A_REG_INTM1:
+	case RT8973A_REG_INTM2:
+		return true;
+	default:
+		break;
+	}
+	return false;
+}
+
+static const struct regmap_config rt8973a_muic_regmap_config = {
+	.reg_bits	= 8,
+	.val_bits	= 8,
+	.volatile_reg	= rt8973a_muic_volatile_reg,
+	.max_register	= RT8973A_REG_END,
+};
+
+/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
+static int rt8973a_muic_set_path(struct rt8973a_muic_info *info,
+				unsigned int con_sw, bool attached)
+{
+	int ret;
+
+	/*
+	 * Don't need to set h/w path according to cable type
+	 * if Auto-configuration mode of CONTROL1 register is true.
+	 */
+	if (info->auto_config)
+		return 0;
+
+	if (!attached)
+		con_sw	= DM_DP_SWITCH_UART;
+
+	switch (con_sw) {
+	case DM_DP_SWITCH_OPEN:
+	case DM_DP_SWITCH_USB:
+	case DM_DP_SWITCH_UART:
+		ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1,
+					RT8973A_REG_MANUAL_SW1_DP_MASK |
+					RT8973A_REG_MANUAL_SW1_DM_MASK,
+					con_sw);
+		if (ret < 0) {
+			dev_err(info->dev,
+				"cannot update DM_CON/DP_CON switch\n");
+			return ret;
+		}
+		break;
+	default:
+		dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
+				con_sw);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info)
+{
+	unsigned int adc, dev1;
+	int ret, cable_type;
+
+	/* Read ADC value according to external cable or button */
+	ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc);
+	if (ret) {
+		dev_err(info->dev, "failed to read ADC register\n");
+		return ret;
+	}
+	cable_type = adc & RT8973A_REG_ADC_MASK;
+
+	/* Read Device 1 reigster to identify correct cable type */
+	ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1);
+	if (ret) {
+		dev_err(info->dev, "failed to read DEV1 register\n");
+		return ret;
+	}
+
+	switch (adc) {
+	case RT8973A_MUIC_ADC_OPEN:
+		if (dev1 & RT8973A_REG_DEV1_USB_MASK)
+			cable_type = RT8973A_MUIC_ADC_USB;
+		else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK)
+			cable_type = RT8973A_MUIC_ADC_TA;
+		else
+			cable_type = RT8973A_MUIC_ADC_OPEN;
+		break;
+	default:
+		break;
+	}
+
+	return cable_type;
+}
+
+static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info,
+					enum rt8973a_event_type event)
+{
+	static unsigned int prev_cable_type;
+	unsigned int con_sw = DM_DP_SWITCH_UART;
+	int ret, cable_type;
+	unsigned int id;
+	bool attached = false;
+
+	switch (event) {
+	case RT8973A_EVENT_ATTACH:
+		cable_type = rt8973a_muic_get_cable_type(info);
+		attached = true;
+		break;
+	case RT8973A_EVENT_DETACH:
+		cable_type = prev_cable_type;
+		attached = false;
+		break;
+	case RT8973A_EVENT_OVP:
+	case RT8973A_EVENT_OTP:
+		dev_warn(info->dev,
+			"happen Over %s issue. Need to disconnect all cables\n",
+			event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature");
+		cable_type = prev_cable_type;
+		attached = false;
+		break;
+	default:
+		dev_err(info->dev,
+			"Cannot handle this event (event:%d)\n", event);
+		return -EINVAL;
+	}
+	prev_cable_type = cable_type;
+
+	switch (cable_type) {
+	case RT8973A_MUIC_ADC_OTG:
+		id = EXTCON_USB_HOST;
+		con_sw = DM_DP_SWITCH_USB;
+		break;
+	case RT8973A_MUIC_ADC_TA:
+		id = EXTCON_CHG_USB_DCP;
+		con_sw = DM_DP_SWITCH_OPEN;
+		break;
+	case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
+	case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
+		id = EXTCON_JIG;
+		con_sw = DM_DP_SWITCH_USB;
+		break;
+	case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
+	case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
+		id = EXTCON_JIG;
+		con_sw = DM_DP_SWITCH_UART;
+		break;
+	case RT8973A_MUIC_ADC_USB:
+		id = EXTCON_USB;
+		con_sw = DM_DP_SWITCH_USB;
+		break;
+	case RT8973A_MUIC_ADC_OPEN:
+		return 0;
+	case RT8973A_MUIC_ADC_UNKNOWN_ACC_1:
+	case RT8973A_MUIC_ADC_UNKNOWN_ACC_2:
+	case RT8973A_MUIC_ADC_UNKNOWN_ACC_3:
+	case RT8973A_MUIC_ADC_UNKNOWN_ACC_4:
+	case RT8973A_MUIC_ADC_UNKNOWN_ACC_5:
+		dev_warn(info->dev,
+			"Unknown accessory type (adc:0x%x)\n", cable_type);
+		return 0;
+	case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_TYPE2:
+		dev_warn(info->dev,
+			"Audio device/button type (adc:0x%x)\n", cable_type);
+		return 0;
+	case RT8973A_MUIC_ADC_RESERVED_ACC_1:
+	case RT8973A_MUIC_ADC_RESERVED_ACC_2:
+	case RT8973A_MUIC_ADC_RESERVED_ACC_3:
+	case RT8973A_MUIC_ADC_RESERVED_ACC_4:
+	case RT8973A_MUIC_ADC_RESERVED_ACC_5:
+	case RT8973A_MUIC_ADC_PHONE_POWERED_DEV:
+		return 0;
+	default:
+		dev_err(info->dev,
+			"Cannot handle this cable_type (adc:0x%x)\n",
+			cable_type);
+		return -EINVAL;
+	}
+
+	/* Change internal hardware path(DM_CON/DP_CON) */
+	ret = rt8973a_muic_set_path(info, con_sw, attached);
+	if (ret < 0)
+		return ret;
+
+	/* Change the state of external accessory */
+	extcon_set_state_sync(info->edev, id, attached);
+	if (id == EXTCON_USB)
+		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+					attached);
+
+	return 0;
+}
+
+static void rt8973a_muic_irq_work(struct work_struct *work)
+{
+	struct rt8973a_muic_info *info = container_of(work,
+			struct rt8973a_muic_info, irq_work);
+	int ret = 0;
+
+	if (!info->edev)
+		return;
+
+	mutex_lock(&info->mutex);
+
+	/* Detect attached or detached cables */
+	if (info->irq_attach) {
+		ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH);
+		info->irq_attach = false;
+	}
+
+	if (info->irq_detach) {
+		ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH);
+		info->irq_detach = false;
+	}
+
+	if (info->irq_ovp) {
+		ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP);
+		info->irq_ovp = false;
+	}
+
+	if (info->irq_otp) {
+		ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP);
+		info->irq_otp = false;
+	}
+
+	if (ret < 0)
+		dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+	mutex_unlock(&info->mutex);
+}
+
+static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data)
+{
+	struct rt8973a_muic_info *info = data;
+	int i, irq_type = -1;
+
+	for (i = 0; i < info->num_muic_irqs; i++)
+		if (irq == info->muic_irqs[i].virq)
+			irq_type = info->muic_irqs[i].irq;
+
+	switch (irq_type) {
+	case RT8973A_INT1_ATTACH:
+		info->irq_attach = true;
+		break;
+	case RT8973A_INT1_DETACH:
+		info->irq_detach = true;
+		break;
+	case RT8973A_INT1_OVP:
+		info->irq_ovp = true;
+		break;
+	case RT8973A_INT1_OTP:
+		info->irq_otp = true;
+		break;
+	case RT8973A_INT1_CHGDET:
+	case RT8973A_INT1_DCD_T:
+	case RT8973A_INT1_CONNECT:
+	case RT8973A_INT1_ADC_CHG:
+	case RT8973A_INT2_UVLO:
+	case RT8973A_INT2_POR:
+	case RT8973A_INT2_OTP_FET:
+	case RT8973A_INT2_OVP_FET:
+	case RT8973A_INT2_OCP_LATCH:
+	case RT8973A_INT2_OCP:
+	case RT8973A_INT2_OVP_OCP:
+	default:
+		dev_dbg(info->dev,
+			"Cannot handle this interrupt (%d)\n", irq_type);
+		break;
+	}
+
+	schedule_work(&info->irq_work);
+
+	return IRQ_HANDLED;
+}
+
+static void rt8973a_muic_detect_cable_wq(struct work_struct *work)
+{
+	struct rt8973a_muic_info *info = container_of(to_delayed_work(work),
+				struct rt8973a_muic_info, wq_detcable);
+	int ret;
+
+	/* Notify the state of connector cable or not  */
+	ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH);
+	if (ret < 0)
+		dev_warn(info->dev, "failed to detect cable state\n");
+}
+
+static void rt8973a_init_dev_type(struct rt8973a_muic_info *info)
+{
+	unsigned int data, vendor_id, version_id;
+	int i, ret;
+
+	/* To test I2C, Print version_id and vendor_id of RT8973A */
+	ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data);
+	if (ret) {
+		dev_err(info->dev,
+			"failed to read DEVICE_ID register: %d\n", ret);
+		return;
+	}
+
+	vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >>
+				RT8973A_REG_DEVICE_ID_VENDOR_SHIFT);
+	version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >>
+				RT8973A_REG_DEVICE_ID_VERSION_SHIFT);
+
+	dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
+			    version_id, vendor_id);
+
+	/* Initiazle the register of RT8973A device to bring-up */
+	for (i = 0; i < info->num_reg_data; i++) {
+		u8 reg = info->reg_data[i].reg;
+		u8 mask = info->reg_data[i].mask;
+		u8 val = 0;
+
+		if (info->reg_data[i].invert)
+			val = ~info->reg_data[i].val;
+		else
+			val = info->reg_data[i].val;
+
+		regmap_update_bits(info->regmap, reg, mask, val);
+	}
+
+	/* Check whether RT8973A is auto switching mode or not */
+	ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data);
+	if (ret) {
+		dev_err(info->dev,
+			"failed to read CONTROL1 register: %d\n", ret);
+		return;
+	}
+
+	data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK;
+	if (data) {
+		info->auto_config = true;
+		dev_info(info->dev,
+			"Enable Auto-configuration for internal path\n");
+	}
+}
+
+static int rt8973a_muic_i2c_probe(struct i2c_client *i2c)
+{
+	struct device_node *np = i2c->dev.of_node;
+	struct rt8973a_muic_info *info;
+	int i, ret, irq_flags;
+
+	if (!np)
+		return -EINVAL;
+
+	info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+	i2c_set_clientdata(i2c, info);
+
+	info->dev = &i2c->dev;
+	info->i2c = i2c;
+	info->irq = i2c->irq;
+	info->muic_irqs = rt8973a_muic_irqs;
+	info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs);
+	info->reg_data = rt8973a_reg_data;
+	info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data);
+
+	mutex_init(&info->mutex);
+
+	INIT_WORK(&info->irq_work, rt8973a_muic_irq_work);
+
+	info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config);
+	if (IS_ERR(info->regmap)) {
+		ret = PTR_ERR(info->regmap);
+		dev_err(info->dev, "failed to allocate register map: %d\n",
+				   ret);
+		return ret;
+	}
+
+	/* Support irq domain for RT8973A MUIC device */
+	irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
+	ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
+				  &rt8973a_muic_irq_chip, &info->irq_data);
+	if (ret != 0) {
+		dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n",
+				    info->irq, ret);
+		return ret;
+	}
+
+	for (i = 0; i < info->num_muic_irqs; i++) {
+		struct muic_irq *muic_irq = &info->muic_irqs[i];
+		int virq = 0;
+
+		virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
+		if (virq <= 0)
+			return -EINVAL;
+		muic_irq->virq = virq;
+
+		ret = devm_request_threaded_irq(info->dev, virq, NULL,
+						rt8973a_muic_irq_handler,
+						IRQF_NO_SUSPEND | IRQF_ONESHOT,
+						muic_irq->name, info);
+		if (ret) {
+			dev_err(info->dev,
+				"failed: irq request (IRQ: %d, error :%d)\n",
+				muic_irq->irq, ret);
+			return ret;
+		}
+	}
+
+	/* Allocate extcon device */
+	info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable);
+	if (IS_ERR(info->edev)) {
+		dev_err(info->dev, "failed to allocate memory for extcon\n");
+		return -ENOMEM;
+	}
+
+	/* Register extcon device */
+	ret = devm_extcon_dev_register(info->dev, info->edev);
+	if (ret) {
+		dev_err(info->dev, "failed to register extcon device\n");
+		return ret;
+	}
+
+	/*
+	 * 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, rt8973a_muic_detect_cable_wq);
+	queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+			msecs_to_jiffies(DELAY_MS_DEFAULT));
+
+	/* Initialize RT8973A device and print vendor id and version id */
+	rt8973a_init_dev_type(info);
+
+	return 0;
+}
+
+static void rt8973a_muic_i2c_remove(struct i2c_client *i2c)
+{
+	struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
+
+	regmap_del_irq_chip(info->irq, info->irq_data);
+}
+
+static const struct of_device_id rt8973a_dt_match[] = {
+	{ .compatible = "richtek,rt8973a-muic" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, rt8973a_dt_match);
+
+#ifdef CONFIG_PM_SLEEP
+static int rt8973a_muic_suspend(struct device *dev)
+{
+	struct i2c_client *i2c = to_i2c_client(dev);
+	struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
+
+	enable_irq_wake(info->irq);
+
+	return 0;
+}
+
+static int rt8973a_muic_resume(struct device *dev)
+{
+	struct i2c_client *i2c = to_i2c_client(dev);
+	struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
+
+	disable_irq_wake(info->irq);
+
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops,
+			 rt8973a_muic_suspend, rt8973a_muic_resume);
+
+static const struct i2c_device_id rt8973a_i2c_id[] = {
+	{ "rt8973a", TYPE_RT8973A },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id);
+
+static struct i2c_driver rt8973a_muic_i2c_driver = {
+	.driver		= {
+		.name	= "rt8973a",
+		.pm	= &rt8973a_muic_pm_ops,
+		.of_match_table = rt8973a_dt_match,
+	},
+	.probe = rt8973a_muic_i2c_probe,
+	.remove	= rt8973a_muic_i2c_remove,
+	.id_table = rt8973a_i2c_id,
+};
+
+static int __init rt8973a_muic_i2c_init(void)
+{
+	return i2c_add_driver(&rt8973a_muic_i2c_driver);
+}
+subsys_initcall(rt8973a_muic_i2c_init);
+
+MODULE_DESCRIPTION("Richtek RT8973A Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");