extcon: sm5502: Add support new SM5502 extcon device driver

This patch add new SM5502 MUIC(Micro-USB Interface Controller) device by using
EXTCON subsystem. The extcon-sm5502 driver is capable of identifying the type
of the external power source and attached accessory. An external power sources,
such as Deticated Charger or a standard USB port, are able to charge the battery
in the smart phone via the connector.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

3 files changed, 631 insertions, 0 deletions

diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index 9125eba6b3d6..6f2f4727de2c 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -70,4 +70,14 @@ config EXTCON_PALMAS
           Say Y here to enable support for USB peripheral and USB host
           detection by palmas usb.
 
+config EXTCON_SM5502
+        tristate "SM5502 EXTCON support"
+        select IRQ_DOMAIN
+        select REGMAP_I2C
+        select REGMAP_IRQ
+        help
+          If you say yes here you get support for the MUIC device of
+          Silicon Mitus SM5502. The SM5502 is a USB port accessory
+          detector and switch.
+
 endif # MULTISTATE_SWITCH
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
index e48abc6d230f..b38546eb522a 100644
--- a/drivers/extcon/Makefile
+++ b/drivers/extcon/Makefile
@@ -10,3 +10,4 @@ obj-$(CONFIG_EXTCON_MAX14577)	+= extcon-max14577.o
 obj-$(CONFIG_EXTCON_MAX77693)   += extcon-max77693.o
 obj-$(CONFIG_EXTCON_MAX8997)    += extcon-max8997.o
 obj-$(CONFIG_EXTCON_PALMAS)     += extcon-palmas.o
+obj-$(CONFIG_EXTCON_SM5502)     += extcon-sm5502.o
diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c
new file mode 100644
index 000000000000..9f318c222b89
--- /dev/null
+++ b/drivers/extcon/extcon-sm5502.c
@@ -0,0 +1,620 @@
+/*
+ * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ * Author: 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/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.h>
+#include <linux/extcon/sm5502.h>
+
+struct muic_irq {
+        unsigned int irq;
+        const char *name;
+        unsigned int virq;
+};
+
+struct reg_data {
+        u8 reg;
+        unsigned int val;
+        bool invert;
+};
+
+struct sm5502_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;
+        struct work_struct irq_work;
+
+        struct reg_data *reg_data;
+        unsigned int num_reg_data;
+
+        struct mutex mutex;
+};
+
+/* Default value of SM5502 register to bring up MUIC device. */
+static struct reg_data sm5502_reg_data[] = {
+        {
+                .reg = SM5502_REG_CONTROL,
+                .val = SM5502_REG_CONTROL_MASK_INT_MASK,
+                .invert = false,
+        }, {
+                .reg = SM5502_REG_INTMASK1,
+                .val = SM5502_REG_INTM1_KP_MASK
+                        | SM5502_REG_INTM1_LKP_MASK
+                        | SM5502_REG_INTM1_LKR_MASK,
+                .invert = true,
+        }, {
+                .reg = SM5502_REG_INTMASK2,
+                .val = SM5502_REG_INTM2_VBUS_DET_MASK
+                        | SM5502_REG_INTM2_REV_ACCE_MASK
+                        | SM5502_REG_INTM2_ADC_CHG_MASK
+                        | SM5502_REG_INTM2_STUCK_KEY_MASK
+                        | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
+                        | SM5502_REG_INTM2_MHL_MASK,
+                .invert = true,
+        },
+        { }
+};
+
+/* List of detectable cables */
+enum {
+        EXTCON_CABLE_USB = 0,
+        EXTCON_CABLE_USB_HOST,
+        EXTCON_CABLE_TA,
+
+        EXTCON_CABLE_END,
+};
+
+static const char *sm5502_extcon_cable[] = {
+        [EXTCON_CABLE_USB]      = "USB",
+        [EXTCON_CABLE_USB_HOST] = "USB-Host",
+        [EXTCON_CABLE_TA]       = "TA",
+        NULL,
+};
+
+/* Define supported accessory type */
+enum sm5502_muic_acc_type {
+        SM5502_MUIC_ADC_GROUND = 0x0,
+        SM5502_MUIC_ADC_SEND_END_BUTTON,
+        SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
+        SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
+        SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
+        SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
+        SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
+        SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
+        SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
+        SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
+        SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
+        SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
+        SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
+        SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
+        SM5502_MUIC_ADC_RESERVED_ACC_1,
+        SM5502_MUIC_ADC_RESERVED_ACC_2,
+        SM5502_MUIC_ADC_RESERVED_ACC_3,
+        SM5502_MUIC_ADC_RESERVED_ACC_4,
+        SM5502_MUIC_ADC_RESERVED_ACC_5,
+        SM5502_MUIC_ADC_AUDIO_TYPE2,
+        SM5502_MUIC_ADC_PHONE_POWERED_DEV,
+        SM5502_MUIC_ADC_TTY_CONVERTER,
+        SM5502_MUIC_ADC_UART_CABLE,
+        SM5502_MUIC_ADC_TYPE1_CHARGER,
+        SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
+        SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
+        SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
+        SM5502_MUIC_ADC_TYPE2_CHARGER,
+        SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
+        SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
+        SM5502_MUIC_ADC_AUDIO_TYPE1,
+        SM5502_MUIC_ADC_OPEN = 0x1f,
+
+        /* The below accessories have same ADC value (0x1f or 0x1e).
+           So, Device type1 is used to separate specific accessory. */
+                                                        /* |---------|--ADC| */
+                                                        /* |    [7:5]|[4:0]| */
+        SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* |      001|11110| */
+        SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e,    /* |      010|11110| */
+                                                        /* |Dev Type1|--ADC| */
+        SM5502_MUIC_ADC_OPEN_USB = 0x5f,                /* |      010|11111| */
+        SM5502_MUIC_ADC_OPEN_TA = 0xdf,                 /* |      110|11111| */
+        SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff,            /* |      111|11111| */
+};
+
+/* List of supported interrupt for SM5502 */
+static struct muic_irq sm5502_muic_irqs[] = {
+        { SM5502_IRQ_INT1_ATTACH,       "muic-attach" },
+        { SM5502_IRQ_INT1_DETACH,       "muic-detach" },
+        { SM5502_IRQ_INT1_KP,           "muic-kp" },
+        { SM5502_IRQ_INT1_LKP,          "muic-lkp" },
+        { SM5502_IRQ_INT1_LKR,          "muic-lkr" },
+        { SM5502_IRQ_INT1_OVP_EVENT,    "muic-ovp-event" },
+        { SM5502_IRQ_INT1_OCP_EVENT,    "muic-ocp-event" },
+        { SM5502_IRQ_INT1_OVP_OCP_DIS,  "muic-ovp-ocp-dis" },
+        { SM5502_IRQ_INT2_VBUS_DET,     "muic-vbus-det" },
+        { SM5502_IRQ_INT2_REV_ACCE,     "muic-rev-acce" },
+        { SM5502_IRQ_INT2_ADC_CHG,      "muic-adc-chg" },
+        { SM5502_IRQ_INT2_STUCK_KEY,    "muic-stuck-key" },
+        { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
+        { SM5502_IRQ_INT2_MHL,          "muic-mhl" },
+};
+
+/* Define interrupt list of SM5502 to register regmap_irq */
+static const struct regmap_irq sm5502_irqs[] = {
+        /* INT1 interrupts */
+        { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
+        { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
+        { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
+        { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
+        { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
+        { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
+        { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
+        { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
+
+        /* INT2 interrupts */
+        { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
+        { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
+        { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
+        { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
+        { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
+        { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
+};
+
+static const struct regmap_irq_chip sm5502_muic_irq_chip = {
+        .name                   = "sm5502",
+        .status_base            = SM5502_REG_INT1,
+        .mask_base              = SM5502_REG_INTMASK1,
+        .mask_invert            = false,
+        .num_regs               = 2,
+        .irqs                   = sm5502_irqs,
+        .num_irqs               = ARRAY_SIZE(sm5502_irqs),
+};
+
+/* Define regmap configuration of SM5502 for I2C communication  */
+static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
+{
+        switch (reg) {
+        case SM5502_REG_INTMASK1:
+        case SM5502_REG_INTMASK2:
+                return true;
+        default:
+                break;
+        }
+        return false;
+}
+
+static const struct regmap_config sm5502_muic_regmap_config = {
+        .reg_bits       = 8,
+        .val_bits       = 8,
+        .volatile_reg   = sm5502_muic_volatile_reg,
+        .max_register   = SM5502_REG_END,
+};
+
+/* Return cable type of attached or detached accessories */
+static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
+{
+        unsigned int cable_type = -1, adc, dev_type1;
+        int ret;
+
+        /* Read ADC value according to external cable or button */
+        ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
+        if (ret) {
+                dev_err(info->dev, "failed to read ADC register\n");
+                return ret;
+        }
+
+        /*
+         * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
+         * connected with to MUIC device.
+         */
+        cable_type &= SM5502_REG_ADC_MASK;
+        if (cable_type == SM5502_MUIC_ADC_GROUND)
+                return SM5502_MUIC_ADC_GROUND;
+
+        switch (cable_type) {
+        case SM5502_MUIC_ADC_GROUND:
+        case SM5502_MUIC_ADC_SEND_END_BUTTON:
+        case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
+        case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
+        case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
+        case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
+        case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
+        case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
+        case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
+        case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
+        case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
+        case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
+        case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
+        case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
+        case SM5502_MUIC_ADC_RESERVED_ACC_1:
+        case SM5502_MUIC_ADC_RESERVED_ACC_2:
+        case SM5502_MUIC_ADC_RESERVED_ACC_3:
+        case SM5502_MUIC_ADC_RESERVED_ACC_4:
+        case SM5502_MUIC_ADC_RESERVED_ACC_5:
+        case SM5502_MUIC_ADC_AUDIO_TYPE2:
+        case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
+        case SM5502_MUIC_ADC_TTY_CONVERTER:
+        case SM5502_MUIC_ADC_UART_CABLE:
+        case SM5502_MUIC_ADC_TYPE1_CHARGER:
+        case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
+        case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
+        case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
+        case SM5502_MUIC_ADC_TYPE2_CHARGER:
+        case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
+        case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
+                break;
+        case SM5502_MUIC_ADC_AUDIO_TYPE1:
+                /*
+                 * Check whether cable type is
+                 * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
+                 * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
+                 * by using Button event.
+                 */
+                break;
+        case SM5502_MUIC_ADC_OPEN:
+                ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
+                                  &dev_type1);
+                if (ret) {
+                        dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
+                        return ret;
+                }
+
+                switch (dev_type1) {
+                case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
+                        cable_type = SM5502_MUIC_ADC_OPEN_USB;
+                        break;
+                case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
+                        cable_type = SM5502_MUIC_ADC_OPEN_TA;
+                        break;
+                case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
+                        cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
+                        break;
+                default:
+                        dev_dbg(info->dev,
+                                "cannot identify the cable type: adc(0x%x) "
+                                "dev_type1(0x%x)\n", adc, dev_type1);
+                        return -EINVAL;
+                };
+                break;
+        default:
+                dev_err(info->dev,
+                        "failed to identify the cable type: adc(0x%x)\n", adc);
+                return -EINVAL;
+        };
+
+        return cable_type;
+}
+
+static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
+                                     bool attached)
+{
+        static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
+        const char **cable_names = info->edev->supported_cable;
+        unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
+        unsigned int idx = 0;
+
+        if (!cable_names)
+                return 0;
+
+        /* Get the type of attached or detached cable */
+        if (attached)
+                cable_type = sm5502_muic_get_cable_type(info);
+        else if (!attached)
+                cable_type = prev_cable_type;
+        prev_cable_type = cable_type;
+
+        switch (cable_type) {
+        case SM5502_MUIC_ADC_OPEN_USB:
+                idx = EXTCON_CABLE_USB;
+                break;
+        case SM5502_MUIC_ADC_OPEN_TA:
+                idx = EXTCON_CABLE_TA;
+                break;
+        case SM5502_MUIC_ADC_OPEN_USB_OTG:
+                idx = EXTCON_CABLE_USB_HOST;
+                break;
+        default:
+                dev_dbg(info->dev,
+                        "cannot handle this cable_type (0x%x)\n", cable_type);
+                return 0;
+        };
+
+        extcon_set_cable_state(info->edev, cable_names[idx], attached);
+
+        return 0;
+}
+
+static void sm5502_muic_irq_work(struct work_struct *work)
+{
+        struct sm5502_muic_info *info = container_of(work,
+                        struct sm5502_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 = sm5502_muic_cable_handler(info, true);
+                info->irq_attach = false;
+        }
+        if (info->irq_detach) {
+                ret = sm5502_muic_cable_handler(info, false);
+                info->irq_detach = false;
+        }
+
+        if (ret < 0)
+                dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+        mutex_unlock(&info->mutex);
+
+        return;
+}
+
+/*
+ * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
+ * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
+ */
+static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
+{
+        switch (irq_type) {
+        case SM5502_IRQ_INT1_ATTACH:
+                info->irq_attach = true;
+                break;
+        case SM5502_IRQ_INT1_DETACH:
+                info->irq_detach = true;
+                break;
+        case SM5502_IRQ_INT1_KP:
+        case SM5502_IRQ_INT1_LKP:
+        case SM5502_IRQ_INT1_LKR:
+        case SM5502_IRQ_INT1_OVP_EVENT:
+        case SM5502_IRQ_INT1_OCP_EVENT:
+        case SM5502_IRQ_INT1_OVP_OCP_DIS:
+        case SM5502_IRQ_INT2_VBUS_DET:
+        case SM5502_IRQ_INT2_REV_ACCE:
+        case SM5502_IRQ_INT2_ADC_CHG:
+        case SM5502_IRQ_INT2_STUCK_KEY:
+        case SM5502_IRQ_INT2_STUCK_KEY_RCV:
+        case SM5502_IRQ_INT2_MHL:
+        default:
+                break;
+        }
+
+        return 0;
+}
+
+static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
+{
+        struct sm5502_muic_info *info = data;
+        int i, irq_type = -1, ret;
+
+        for (i = 0; i < info->num_muic_irqs; i++)
+                if (irq == info->muic_irqs[i].virq)
+                        irq_type = info->muic_irqs[i].irq;
+
+        ret = sm5502_parse_irq(info, irq_type);
+        if (ret < 0) {
+                dev_warn(info->dev, "cannot handle is interrupt:%d\n",
+                                    irq_type);
+                return IRQ_HANDLED;
+        }
+        schedule_work(&info->irq_work);
+
+        return IRQ_HANDLED;
+}
+
+static void sm5502_init_dev_type(struct sm5502_muic_info *info)
+{
+        unsigned int reg_data, vendor_id, version_id;
+        int i, ret;
+
+        /* To test I2C, Print version_id and vendor_id of SM5502 */
+        ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
+        if (ret) {
+                dev_err(info->dev,
+                        "failed to read DEVICE_ID register: %d\n", ret);
+                return;
+        }
+
+        vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
+                                SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
+        version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
+                                SM5502_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 SM5502 device to bring-up */
+        for (i = 0; i < info->num_reg_data; i++) {
+                unsigned int val = 0;
+
+                if (!info->reg_data[i].invert)
+                        val |= ~info->reg_data[i].val;
+                else
+                        val = info->reg_data[i].val;
+                regmap_write(info->regmap, info->reg_data[i].reg, val);
+        }
+}
+
+static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
+                                 const struct i2c_device_id *id)
+{
+        struct device_node *np = i2c->dev.of_node;
+        struct sm5502_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 = sm5502_muic_irqs;
+        info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
+        info->reg_data = sm5502_reg_data;
+        info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
+
+        mutex_init(&info->mutex);
+
+        INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
+
+        info->regmap = devm_regmap_init_i2c(i2c, &sm5502_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 SM5502 MUIC device */
+        irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
+        ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
+                                  &sm5502_muic_irq_chip, &info->irq_data);
+        if (ret != 0) {
+                dev_err(info->dev, "failed to request IRQ %d: %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];
+                unsigned 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,
+                                                sm5502_muic_irq_handler,
+                                                IRQF_NO_SUSPEND,
+                                                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, sm5502_extcon_cable);
+        if (IS_ERR(info->edev)) {
+                dev_err(info->dev, "failed to allocate memory for extcon\n");
+                return -ENOMEM;
+        }
+        info->edev->name = np->name;
+
+        /* 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;
+        }
+
+        /* Initialize SM5502 device and print vendor id and version id */
+        sm5502_init_dev_type(info);
+
+        return 0;
+}
+
+static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
+{
+        struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
+
+        regmap_del_irq_chip(info->irq, info->irq_data);
+
+        return 0;
+}
+
+static struct of_device_id sm5502_dt_match[] = {
+        { .compatible = "siliconmitus,sm5502-muic" },
+        { },
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int sm5502_muic_suspend(struct device *dev)
+{
+        struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+        struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
+
+        enable_irq_wake(info->irq);
+
+        return 0;
+}
+
+static int sm5502_muic_resume(struct device *dev)
+{
+        struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+        struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
+
+        disable_irq_wake(info->irq);
+
+        return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
+                         sm5502_muic_suspend, sm5502_muic_resume);
+
+static const struct i2c_device_id sm5502_i2c_id[] = {
+        { "sm5502", TYPE_SM5502 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
+
+static struct i2c_driver sm5502_muic_i2c_driver = {
+        .driver         = {
+                .name   = "sm5502",
+                .owner  = THIS_MODULE,
+                .pm     = &sm5502_muic_pm_ops,
+                .of_match_table = sm5502_dt_match,
+        },
+        .probe  = sm5022_muic_i2c_probe,
+        .remove = sm5502_muic_i2c_remove,
+        .id_table = sm5502_i2c_id,
+};
+
+static int __init sm5502_muic_i2c_init(void)
+{
+        return i2c_add_driver(&sm5502_muic_i2c_driver);
+}
+subsys_initcall(sm5502_muic_i2c_init);
+
+MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");