Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (57 commits)
  Input: adp5588-keypad - fix NULL dereference in adp5588_gpio_add()
  Input: cy8ctmg110 - capacitive touchscreen support
  Input: keyboard - also match braille-only keyboards
  Input: adp5588-keys - export unused GPIO pins
  Input: xpad - add product ID for Hori Fighting Stick EX2
  Input: adxl34x - fix leak and use after free
  Input: samsung-keypad - Add samsung keypad driver
  Input: i8042 - reset keyboard controller wehen resuming from S2R
  Input: synaptics - set min/max for finger width
  Input: synaptics - only report width on hardware that supports it
  Input: evdev - signal that device is writable in evdev_poll()
  Input: mousedev - signal that device is writable in mousedev_poll()
  Input: change input handlers to use bool when possible
  Input: document the MT event slot protocol
  Input: introduce MT event slots
  Input: usbtouchscreen - implement reset_resume
  Input: usbtouchscreen - implement runtime power management
  Input: usbtouchscreen - implement basic suspend/resume
  Input: Add ATMEL QT602240 touchscreen driver
  Input: fix signedness warning in input_set_keycode()
  ...

8 files changed, 1196 insertions, 47 deletions

diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index 1ba25145b333..b171f63fe4d7 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -297,6 +297,18 @@ config KEYBOARD_MAX7359
           To compile this driver as a module, choose M here: the
           module will be called max7359_keypad.
 
+config KEYBOARD_MCS
+        tristate "MELFAS MCS Touchkey"
+        depends on I2C
+        help
+          Say Y here if you have the MELFAS MCS5000/5080 touchkey controller
+          chip in your system.
+
+          If unsure, say N.
+
+          To compile this driver as a module, choose M here: the
+          module will be called mcs_touchkey.
+
 config KEYBOARD_IMX
         tristate "IMX keypad support"
         depends on ARCH_MXC
@@ -342,6 +354,15 @@ config KEYBOARD_PXA930_ROTARY
           To compile this driver as a module, choose M here: the
           module will be called pxa930_rotary.
 
+config KEYBOARD_SAMSUNG
+        tristate "Samsung keypad support"
+        depends on SAMSUNG_DEV_KEYPAD
+        help
+          Say Y here if you want to use the Samsung keypad.
+
+          To compile this driver as a module, choose M here: the
+          module will be called samsung-keypad.
+
 config KEYBOARD_STOWAWAY
         tristate "Stowaway keyboard"
         select SERIO
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 4596d0c6f922..1a66d5f1ca8b 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -26,12 +26,14 @@ obj-$(CONFIG_KEYBOARD_LOCOMO)		+= locomokbd.o
 obj-$(CONFIG_KEYBOARD_MAPLE)            += maple_keyb.o
 obj-$(CONFIG_KEYBOARD_MATRIX)           += matrix_keypad.o
 obj-$(CONFIG_KEYBOARD_MAX7359)          += max7359_keypad.o
+obj-$(CONFIG_KEYBOARD_MCS)              += mcs_touchkey.o
 obj-$(CONFIG_KEYBOARD_NEWTON)           += newtonkbd.o
 obj-$(CONFIG_KEYBOARD_OMAP)             += omap-keypad.o
 obj-$(CONFIG_KEYBOARD_OPENCORES)        += opencores-kbd.o
 obj-$(CONFIG_KEYBOARD_PXA27x)           += pxa27x_keypad.o
 obj-$(CONFIG_KEYBOARD_PXA930_ROTARY)    += pxa930_rotary.o
 obj-$(CONFIG_KEYBOARD_QT2160)           += qt2160.o
+obj-$(CONFIG_KEYBOARD_SAMSUNG)          += samsung-keypad.o
 obj-$(CONFIG_KEYBOARD_SH_KEYSC)         += sh_keysc.o
 obj-$(CONFIG_KEYBOARD_STOWAWAY)         += stowaway.o
 obj-$(CONFIG_KEYBOARD_SUNKBD)           += sunkbd.o
diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
index 744600eff222..d6918cb966c0 100644
--- a/drivers/input/keyboard/adp5588-keys.c
+++ b/drivers/input/keyboard/adp5588-keys.c
@@ -19,6 +19,7 @@
 #include <linux/platform_device.h>
 #include <linux/input.h>
 #include <linux/i2c.h>
+#include <linux/gpio.h>
 #include <linux/slab.h>
 
 #include <linux/i2c/adp5588.h>
@@ -54,6 +55,10 @@
 
 #define KEYP_MAX_EVENT          10
 
+#define MAXGPIO                 18
+#define ADP_BANK(offs)          ((offs) >> 3)
+#define ADP_BIT(offs)           (1u << ((offs) & 0x7))
+
 /*
  * Early pre 4.0 Silicon required to delay readout by at least 25ms,
  * since the Event Counter Register updated 25ms after the interrupt
@@ -67,6 +72,16 @@ struct adp5588_kpad {
         struct delayed_work work;
         unsigned long delay;
         unsigned short keycode[ADP5588_KEYMAPSIZE];
+        const struct adp5588_gpi_map *gpimap;
+        unsigned short gpimapsize;
+#ifdef CONFIG_GPIOLIB
+        unsigned char gpiomap[MAXGPIO];
+        bool export_gpio;
+        struct gpio_chip gc;
+        struct mutex gpio_lock; /* Protect cached dir, dat_out */
+        u8 dat_out[3];
+        u8 dir[3];
+#endif
 };
 
 static int adp5588_read(struct i2c_client *client, u8 reg)
@@ -84,12 +99,222 @@ static int adp5588_write(struct i2c_client *client, u8 reg, u8 val)
         return i2c_smbus_write_byte_data(client, reg, val);
 }
 
+#ifdef CONFIG_GPIOLIB
+static int adp5588_gpio_get_value(struct gpio_chip *chip, unsigned off)
+{
+        struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
+        unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+        unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+
+        return !!(adp5588_read(kpad->client, GPIO_DAT_STAT1 + bank) & bit);
+}
+
+static void adp5588_gpio_set_value(struct gpio_chip *chip,
+                                   unsigned off, int val)
+{
+        struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
+        unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+        unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+
+        mutex_lock(&kpad->gpio_lock);
+
+        if (val)
+                kpad->dat_out[bank] |= bit;
+        else
+                kpad->dat_out[bank] &= ~bit;
+
+        adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank,
+                           kpad->dat_out[bank]);
+
+        mutex_unlock(&kpad->gpio_lock);
+}
+
+static int adp5588_gpio_direction_input(struct gpio_chip *chip, unsigned off)
+{
+        struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
+        unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+        unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+        int ret;
+
+        mutex_lock(&kpad->gpio_lock);
+
+        kpad->dir[bank] &= ~bit;
+        ret = adp5588_write(kpad->client, GPIO_DIR1 + bank, kpad->dir[bank]);
+
+        mutex_unlock(&kpad->gpio_lock);
+
+        return ret;
+}
+
+static int adp5588_gpio_direction_output(struct gpio_chip *chip,
+                                         unsigned off, int val)
+{
+        struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
+        unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+        unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+        int ret;
+
+        mutex_lock(&kpad->gpio_lock);
+
+        kpad->dir[bank] |= bit;
+
+        if (val)
+                kpad->dat_out[bank] |= bit;
+        else
+                kpad->dat_out[bank] &= ~bit;
+
+        ret = adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank,
+                                 kpad->dat_out[bank]);
+        ret |= adp5588_write(kpad->client, GPIO_DIR1 + bank,
+                                 kpad->dir[bank]);
+
+        mutex_unlock(&kpad->gpio_lock);
+
+        return ret;
+}
+
+static int __devinit adp5588_build_gpiomap(struct adp5588_kpad *kpad,
+                                const struct adp5588_kpad_platform_data *pdata)
+{
+        bool pin_used[MAXGPIO];
+        int n_unused = 0;
+        int i;
+
+        memset(pin_used, 0, sizeof(pin_used));
+
+        for (i = 0; i < pdata->rows; i++)
+                pin_used[i] = true;
+
+        for (i = 0; i < pdata->cols; i++)
+                pin_used[i + GPI_PIN_COL_BASE - GPI_PIN_BASE] = true;
+
+        for (i = 0; i < kpad->gpimapsize; i++)
+                pin_used[kpad->gpimap[i].pin - GPI_PIN_BASE] = true;
+
+        for (i = 0; i < MAXGPIO; i++)
+                if (!pin_used[i])
+                        kpad->gpiomap[n_unused++] = i;
+
+        return n_unused;
+}
+
+static int __devinit adp5588_gpio_add(struct adp5588_kpad *kpad)
+{
+        struct device *dev = &kpad->client->dev;
+        const struct adp5588_kpad_platform_data *pdata = dev->platform_data;
+        const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
+        int i, error;
+
+        if (!gpio_data)
+                return 0;
+
+        kpad->gc.ngpio = adp5588_build_gpiomap(kpad, pdata);
+        if (kpad->gc.ngpio == 0) {
+                dev_info(dev, "No unused gpios left to export\n");
+                return 0;
+        }
+
+        kpad->export_gpio = true;
+
+        kpad->gc.direction_input = adp5588_gpio_direction_input;
+        kpad->gc.direction_output = adp5588_gpio_direction_output;
+        kpad->gc.get = adp5588_gpio_get_value;
+        kpad->gc.set = adp5588_gpio_set_value;
+        kpad->gc.can_sleep = 1;
+
+        kpad->gc.base = gpio_data->gpio_start;
+        kpad->gc.label = kpad->client->name;
+        kpad->gc.owner = THIS_MODULE;
+
+        mutex_init(&kpad->gpio_lock);
+
+        error = gpiochip_add(&kpad->gc);
+        if (error) {
+                dev_err(dev, "gpiochip_add failed, err: %d\n", error);
+                return error;
+        }
+
+        for (i = 0; i <= ADP_BANK(MAXGPIO); i++) {
+                kpad->dat_out[i] = adp5588_read(kpad->client,
+                                                GPIO_DAT_OUT1 + i);
+                kpad->dir[i] = adp5588_read(kpad->client, GPIO_DIR1 + i);
+        }
+
+        if (gpio_data->setup) {
+                error = gpio_data->setup(kpad->client,
+                                         kpad->gc.base, kpad->gc.ngpio,
+                                         gpio_data->context);
+                if (error)
+                        dev_warn(dev, "setup failed, %d\n", error);
+        }
+
+        return 0;
+}
+
+static void __devexit adp5588_gpio_remove(struct adp5588_kpad *kpad)
+{
+        struct device *dev = &kpad->client->dev;
+        const struct adp5588_kpad_platform_data *pdata = dev->platform_data;
+        const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
+        int error;
+
+        if (!kpad->export_gpio)
+                return;
+
+        if (gpio_data->teardown) {
+                error = gpio_data->teardown(kpad->client,
+                                            kpad->gc.base, kpad->gc.ngpio,
+                                            gpio_data->context);
+                if (error)
+                        dev_warn(dev, "teardown failed %d\n", error);
+        }
+
+        error = gpiochip_remove(&kpad->gc);
+        if (error)
+                dev_warn(dev, "gpiochip_remove failed %d\n", error);
+}
+#else
+static inline int adp5588_gpio_add(struct adp5588_kpad *kpad)
+{
+        return 0;
+}
+
+static inline void adp5588_gpio_remove(struct adp5588_kpad *kpad)
+{
+}
+#endif
+
+static void adp5588_report_events(struct adp5588_kpad *kpad, int ev_cnt)
+{
+        int i, j;
+
+        for (i = 0; i < ev_cnt; i++) {
+                int key = adp5588_read(kpad->client, Key_EVENTA + i);
+                int key_val = key & KEY_EV_MASK;
+
+                if (key_val >= GPI_PIN_BASE && key_val <= GPI_PIN_END) {
+                        for (j = 0; j < kpad->gpimapsize; j++) {
+                                if (key_val == kpad->gpimap[j].pin) {
+                                        input_report_switch(kpad->input,
+                                                        kpad->gpimap[j].sw_evt,
+                                                        key & KEY_EV_PRESSED);
+                                        break;
+                                }
+                        }
+                } else {
+                        input_report_key(kpad->input,
+                                         kpad->keycode[key_val - 1],
+                                         key & KEY_EV_PRESSED);
+                }
+        }
+}
+
 static void adp5588_work(struct work_struct *work)
 {
         struct adp5588_kpad *kpad = container_of(work,
                                                 struct adp5588_kpad, work.work);
         struct i2c_client *client = kpad->client;
-        int i, key, status, ev_cnt;
+        int status, ev_cnt;
 
         status = adp5588_read(client, INT_STAT);
 
@@ -99,12 +324,7 @@ static void adp5588_work(struct work_struct *work)
         if (status & KE_INT) {
                 ev_cnt = adp5588_read(client, KEY_LCK_EC_STAT) & KEC;
                 if (ev_cnt) {
-                        for (i = 0; i < ev_cnt; i++) {
-                                key = adp5588_read(client, Key_EVENTA + i);
-                                input_report_key(kpad->input,
-                                        kpad->keycode[(key & KEY_EV_MASK) - 1],
-                                        key & KEY_EV_PRESSED);
-                        }
+                        adp5588_report_events(kpad, ev_cnt);
                         input_sync(kpad->input);
                 }
         }
@@ -128,8 +348,10 @@ static irqreturn_t adp5588_irq(int irq, void *handle)
 
 static int __devinit adp5588_setup(struct i2c_client *client)
 {
-        struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;
+        const struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;
+        const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
         int i, ret;
+        unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0;
 
         ret = adp5588_write(client, KP_GPIO1, KP_SEL(pdata->rows));
         ret |= adp5588_write(client, KP_GPIO2, KP_SEL(pdata->cols) & 0xFF);
@@ -144,6 +366,32 @@ static int __devinit adp5588_setup(struct i2c_client *client)
         for (i = 0; i < KEYP_MAX_EVENT; i++)
                 ret |= adp5588_read(client, Key_EVENTA);
 
+        for (i = 0; i < pdata->gpimapsize; i++) {
+                unsigned short pin = pdata->gpimap[i].pin;
+
+                if (pin <= GPI_PIN_ROW_END) {
+                        evt_mode1 |= (1 << (pin - GPI_PIN_ROW_BASE));
+                } else {
+                        evt_mode2 |= ((1 << (pin - GPI_PIN_COL_BASE)) & 0xFF);
+                        evt_mode3 |= ((1 << (pin - GPI_PIN_COL_BASE)) >> 8);
+                }
+        }
+
+        if (pdata->gpimapsize) {
+                ret |= adp5588_write(client, GPI_EM1, evt_mode1);
+                ret |= adp5588_write(client, GPI_EM2, evt_mode2);
+                ret |= adp5588_write(client, GPI_EM3, evt_mode3);
+        }
+
+        if (gpio_data) {
+                for (i = 0; i <= ADP_BANK(MAXGPIO); i++) {
+                        int pull_mask = gpio_data->pullup_dis_mask;
+
+                        ret |= adp5588_write(client, GPIO_PULL1 + i,
+                                (pull_mask >> (8 * i)) & 0xFF);
+                }
+        }
+
         ret |= adp5588_write(client, INT_STAT, CMP2_INT | CMP1_INT |
                                         OVR_FLOW_INT | K_LCK_INT |
                                         GPI_INT | KE_INT); /* Status is W1C */
@@ -158,11 +406,49 @@ static int __devinit adp5588_setup(struct i2c_client *client)
         return 0;
 }
 
+static void __devinit adp5588_report_switch_state(struct adp5588_kpad *kpad)
+{
+        int gpi_stat1 = adp5588_read(kpad->client, GPIO_DAT_STAT1);
+        int gpi_stat2 = adp5588_read(kpad->client, GPIO_DAT_STAT2);
+        int gpi_stat3 = adp5588_read(kpad->client, GPIO_DAT_STAT3);
+        int gpi_stat_tmp, pin_loc;
+        int i;
+
+        for (i = 0; i < kpad->gpimapsize; i++) {
+                unsigned short pin = kpad->gpimap[i].pin;
+
+                if (pin <= GPI_PIN_ROW_END) {
+                        gpi_stat_tmp = gpi_stat1;
+                        pin_loc = pin - GPI_PIN_ROW_BASE;
+                } else if ((pin - GPI_PIN_COL_BASE) < 8) {
+                        gpi_stat_tmp = gpi_stat2;
+                        pin_loc = pin - GPI_PIN_COL_BASE;
+                } else {
+                        gpi_stat_tmp = gpi_stat3;
+                        pin_loc = pin - GPI_PIN_COL_BASE - 8;
+                }
+
+                if (gpi_stat_tmp < 0) {
+                        dev_err(&kpad->client->dev,
+                                "Can't read GPIO_DAT_STAT switch %d default to OFF\n",
+                                pin);
+                        gpi_stat_tmp = 0;
+                }
+
+                input_report_switch(kpad->input,
+                                    kpad->gpimap[i].sw_evt,
+                                    !(gpi_stat_tmp & (1 << pin_loc)));
+        }
+
+        input_sync(kpad->input);
+}
+
+
 static int __devinit adp5588_probe(struct i2c_client *client,
                                         const struct i2c_device_id *id)
 {
         struct adp5588_kpad *kpad;
-        struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;
+        const struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;
         struct input_dev *input;
         unsigned int revid;
         int ret, i;
@@ -189,6 +475,37 @@ static int __devinit adp5588_probe(struct i2c_client *client,
                 return -EINVAL;
         }
 
+        if (!pdata->gpimap && pdata->gpimapsize) {
+                dev_err(&client->dev, "invalid gpimap from pdata\n");
+                return -EINVAL;
+        }
+
+        if (pdata->gpimapsize > ADP5588_GPIMAPSIZE_MAX) {
+                dev_err(&client->dev, "invalid gpimapsize\n");
+                return -EINVAL;
+        }
+
+        for (i = 0; i < pdata->gpimapsize; i++) {
+                unsigned short pin = pdata->gpimap[i].pin;
+
+                if (pin < GPI_PIN_BASE || pin > GPI_PIN_END) {
+                        dev_err(&client->dev, "invalid gpi pin data\n");
+                        return -EINVAL;
+                }
+
+                if (pin <= GPI_PIN_ROW_END) {
+                        if (pin - GPI_PIN_ROW_BASE + 1 <= pdata->rows) {
+                                dev_err(&client->dev, "invalid gpi row data\n");
+                                return -EINVAL;
+                        }
+                } else {
+                        if (pin - GPI_PIN_COL_BASE + 1 <= pdata->cols) {
+                                dev_err(&client->dev, "invalid gpi col data\n");
+                                return -EINVAL;
+                        }
+                }
+        }
+
         if (!client->irq) {
                 dev_err(&client->dev, "no IRQ?\n");
                 return -EINVAL;
@@ -233,6 +550,9 @@ static int __devinit adp5588_probe(struct i2c_client *client,
         memcpy(kpad->keycode, pdata->keymap,
                 pdata->keymapsize * input->keycodesize);
 
+        kpad->gpimap = pdata->gpimap;
+        kpad->gpimapsize = pdata->gpimapsize;
+
         /* setup input device */
         __set_bit(EV_KEY, input->evbit);
 
@@ -243,6 +563,11 @@ static int __devinit adp5588_probe(struct i2c_client *client,
                 __set_bit(kpad->keycode[i] & KEY_MAX, input->keybit);
         __clear_bit(KEY_RESERVED, input->keybit);
 
+        if (kpad->gpimapsize)
+                __set_bit(EV_SW, input->evbit);
+        for (i = 0; i < kpad->gpimapsize; i++)
+                __set_bit(kpad->gpimap[i].sw_evt, input->swbit);
+
         error = input_register_device(input);
         if (error) {
                 dev_err(&client->dev, "unable to register input device\n");
@@ -261,6 +586,13 @@ static int __devinit adp5588_probe(struct i2c_client *client,
         if (error)
                 goto err_free_irq;
 
+        if (kpad->gpimapsize)
+                adp5588_report_switch_state(kpad);
+
+        error = adp5588_gpio_add(kpad);
+        if (error)
+                goto err_free_irq;
+
         device_init_wakeup(&client->dev, 1);
         i2c_set_clientdata(client, kpad);
 
@@ -287,6 +619,7 @@ static int __devexit adp5588_remove(struct i2c_client *client)
         free_irq(client->irq, kpad);
         cancel_delayed_work_sync(&kpad->work);
         input_unregister_device(kpad->input);
+        adp5588_gpio_remove(kpad);
         kfree(kpad);
 
         return 0;
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index b8213fd13c3f..a9fd147f2ba7 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -31,6 +31,7 @@ struct gpio_button_data {
         struct input_dev *input;
         struct timer_list timer;
         struct work_struct work;
+        int timer_debounce;     /* in msecs */
         bool disabled;
 };
 
@@ -109,7 +110,7 @@ static void gpio_keys_disable_button(struct gpio_button_data *bdata)
                  * Disable IRQ and possible debouncing timer.
                  */
                 disable_irq(gpio_to_irq(bdata->button->gpio));
-                if (bdata->button->debounce_interval)
+                if (bdata->timer_debounce)
                         del_timer_sync(&bdata->timer);
 
                 bdata->disabled = true;
@@ -347,9 +348,9 @@ static irqreturn_t gpio_keys_isr(int irq, void *dev_id)
 
         BUG_ON(irq != gpio_to_irq(button->gpio));
 
-        if (button->debounce_interval)
+        if (bdata->timer_debounce)
                 mod_timer(&bdata->timer,
-                        jiffies + msecs_to_jiffies(button->debounce_interval));
+                        jiffies + msecs_to_jiffies(bdata->timer_debounce));
         else
                 schedule_work(&bdata->work);
 
@@ -383,6 +384,14 @@ static int __devinit gpio_keys_setup_key(struct platform_device *pdev,
                 goto fail3;
         }
 
+        if (button->debounce_interval) {
+                error = gpio_set_debounce(button->gpio,
+                                          button->debounce_interval * 1000);
+                /* use timer if gpiolib doesn't provide debounce */
+                if (error < 0)
+                        bdata->timer_debounce = button->debounce_interval;
+        }
+
         irq = gpio_to_irq(button->gpio);
         if (irq < 0) {
                 error = irq;
@@ -498,7 +507,7 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
  fail2:
         while (--i >= 0) {
                 free_irq(gpio_to_irq(pdata->buttons[i].gpio), &ddata->data[i]);
-                if (pdata->buttons[i].debounce_interval)
+                if (ddata->data[i].timer_debounce)
                         del_timer_sync(&ddata->data[i].timer);
                 cancel_work_sync(&ddata->data[i].work);
                 gpio_free(pdata->buttons[i].gpio);
@@ -526,7 +535,7 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev)
         for (i = 0; i < pdata->nbuttons; i++) {
                 int irq = gpio_to_irq(pdata->buttons[i].gpio);
                 free_irq(irq, &ddata->data[i]);
-                if (pdata->buttons[i].debounce_interval)
+                if (ddata->data[i].timer_debounce)
                         del_timer_sync(&ddata->data[i].timer);
                 cancel_work_sync(&ddata->data[i].work);
                 gpio_free(pdata->buttons[i].gpio);
diff --git a/drivers/input/keyboard/lm8323.c b/drivers/input/keyboard/lm8323.c
index 40b032f0e32c..f7c2a166576b 100644
--- a/drivers/input/keyboard/lm8323.c
+++ b/drivers/input/keyboard/lm8323.c
@@ -642,6 +642,7 @@ static int __devinit lm8323_probe(struct i2c_client *client,
         struct lm8323_platform_data *pdata = client->dev.platform_data;
         struct input_dev *idev;
         struct lm8323_chip *lm;
+        int pwm;
         int i, err;
         unsigned long tmo;
         u8 data[2];
@@ -710,8 +711,9 @@ static int __devinit lm8323_probe(struct i2c_client *client,
                 goto fail1;
         }
 
-        for (i = 0; i < LM8323_NUM_PWMS; i++) {
-                err = init_pwm(lm, i + 1, &client->dev, pdata->pwm_names[i]);
+        for (pwm = 0; pwm < LM8323_NUM_PWMS; pwm++) {
+                err = init_pwm(lm, pwm + 1, &client->dev,
+                               pdata->pwm_names[pwm]);
                 if (err < 0)
                         goto fail2;
         }
@@ -764,9 +766,9 @@ fail4:
 fail3:
         device_remove_file(&client->dev, &dev_attr_disable_kp);
 fail2:
-        while (--i >= 0)
-                if (lm->pwm[i].enabled)
-                        led_classdev_unregister(&lm->pwm[i].cdev);
+        while (--pwm >= 0)
+                if (lm->pwm[pwm].enabled)
+                        led_classdev_unregister(&lm->pwm[pwm].cdev);
 fail1:
         input_free_device(idev);
         kfree(lm);
diff --git a/drivers/input/keyboard/matrix_keypad.c b/drivers/input/keyboard/matrix_keypad.c
index b443e088fd3c..b02e4268e18f 100644
--- a/drivers/input/keyboard/matrix_keypad.c
+++ b/drivers/input/keyboard/matrix_keypad.c
@@ -37,6 +37,7 @@ struct matrix_keypad {
         spinlock_t lock;
         bool scan_pending;
         bool stopped;
+        bool gpio_all_disabled;
 };
 
 /*
@@ -87,8 +88,12 @@ static void enable_row_irqs(struct matrix_keypad *keypad)
         const struct matrix_keypad_platform_data *pdata = keypad->pdata;
         int i;
 
-        for (i = 0; i < pdata->num_row_gpios; i++)
-                enable_irq(gpio_to_irq(pdata->row_gpios[i]));
+        if (pdata->clustered_irq > 0)
+                enable_irq(pdata->clustered_irq);
+        else {
+                for (i = 0; i < pdata->num_row_gpios; i++)
+                        enable_irq(gpio_to_irq(pdata->row_gpios[i]));
+        }
 }
 
 static void disable_row_irqs(struct matrix_keypad *keypad)
@@ -96,8 +101,12 @@ static void disable_row_irqs(struct matrix_keypad *keypad)
         const struct matrix_keypad_platform_data *pdata = keypad->pdata;
         int i;
 
-        for (i = 0; i < pdata->num_row_gpios; i++)
-                disable_irq_nosync(gpio_to_irq(pdata->row_gpios[i]));
+        if (pdata->clustered_irq > 0)
+                disable_irq_nosync(pdata->clustered_irq);
+        else {
+                for (i = 0; i < pdata->num_row_gpios; i++)
+                        disable_irq_nosync(gpio_to_irq(pdata->row_gpios[i]));
+        }
 }
 
 /*
@@ -216,45 +225,69 @@ static void matrix_keypad_stop(struct input_dev *dev)
 }
 
 #ifdef CONFIG_PM
-static int matrix_keypad_suspend(struct device *dev)
+static void matrix_keypad_enable_wakeup(struct matrix_keypad *keypad)
 {
-        struct platform_device *pdev = to_platform_device(dev);
-        struct matrix_keypad *keypad = platform_get_drvdata(pdev);
         const struct matrix_keypad_platform_data *pdata = keypad->pdata;
+        unsigned int gpio;
         int i;
 
-        matrix_keypad_stop(keypad->input_dev);
+        if (pdata->clustered_irq > 0) {
+                if (enable_irq_wake(pdata->clustered_irq) == 0)
+                        keypad->gpio_all_disabled = true;
+        } else {
 
-        if (device_may_wakeup(&pdev->dev)) {
                 for (i = 0; i < pdata->num_row_gpios; i++) {
                         if (!test_bit(i, keypad->disabled_gpios)) {
-                                unsigned int gpio = pdata->row_gpios[i];
+                                gpio = pdata->row_gpios[i];
 
                                 if (enable_irq_wake(gpio_to_irq(gpio)) == 0)
                                         __set_bit(i, keypad->disabled_gpios);
                         }
                 }
         }
-
-        return 0;
 }
 
-static int matrix_keypad_resume(struct device *dev)
+static void matrix_keypad_disable_wakeup(struct matrix_keypad *keypad)
 {
-        struct platform_device *pdev = to_platform_device(dev);
-        struct matrix_keypad *keypad = platform_get_drvdata(pdev);
         const struct matrix_keypad_platform_data *pdata = keypad->pdata;
+        unsigned int gpio;
         int i;
 
-        if (device_may_wakeup(&pdev->dev)) {
+        if (pdata->clustered_irq > 0) {
+                if (keypad->gpio_all_disabled) {
+                        disable_irq_wake(pdata->clustered_irq);
+                        keypad->gpio_all_disabled = false;
+                }
+        } else {
                 for (i = 0; i < pdata->num_row_gpios; i++) {
                         if (test_and_clear_bit(i, keypad->disabled_gpios)) {
-                                unsigned int gpio = pdata->row_gpios[i];
-
+                                gpio = pdata->row_gpios[i];
                                 disable_irq_wake(gpio_to_irq(gpio));
                         }
                 }
         }
+}
+
+static int matrix_keypad_suspend(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct matrix_keypad *keypad = platform_get_drvdata(pdev);
+
+        matrix_keypad_stop(keypad->input_dev);
+
+        if (device_may_wakeup(&pdev->dev))
+                matrix_keypad_enable_wakeup(keypad);
+
+        return 0;
+}
+
+static int matrix_keypad_resume(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct matrix_keypad *keypad = platform_get_drvdata(pdev);
+
+        if (device_may_wakeup(&pdev->dev))
+                matrix_keypad_disable_wakeup(keypad);
 
         matrix_keypad_start(keypad->input_dev);
 
@@ -296,17 +329,31 @@ static int __devinit init_matrix_gpio(struct platform_device *pdev,
                 gpio_direction_input(pdata->row_gpios[i]);
         }
 
-        for (i = 0; i < pdata->num_row_gpios; i++) {
-                err = request_irq(gpio_to_irq(pdata->row_gpios[i]),
+        if (pdata->clustered_irq > 0) {
+                err = request_irq(pdata->clustered_irq,
                                 matrix_keypad_interrupt,
-                                IRQF_DISABLED |
-                                IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+                                pdata->clustered_irq_flags,
                                 "matrix-keypad", keypad);
                 if (err) {
                         dev_err(&pdev->dev,
-                                "Unable to acquire interrupt for GPIO line %i\n",
-                                pdata->row_gpios[i]);
-                        goto err_free_irqs;
+                                "Unable to acquire clustered interrupt\n");
+                        goto err_free_rows;
+                }
+        } else {
+                for (i = 0; i < pdata->num_row_gpios; i++) {
+                        err = request_irq(gpio_to_irq(pdata->row_gpios[i]),
+                                        matrix_keypad_interrupt,
+                                        IRQF_DISABLED |
+                                        IRQF_TRIGGER_RISING |
+                                        IRQF_TRIGGER_FALLING,
+                                        "matrix-keypad", keypad);
+                        if (err) {
+                                dev_err(&pdev->dev,
+                                        "Unable to acquire interrupt "
+                                        "for GPIO line %i\n",
+                                        pdata->row_gpios[i]);
+                                goto err_free_irqs;
+                        }
                 }
         }
 
@@ -418,11 +465,16 @@ static int __devexit matrix_keypad_remove(struct platform_device *pdev)
 
         device_init_wakeup(&pdev->dev, 0);
 
-        for (i = 0; i < pdata->num_row_gpios; i++) {
-                free_irq(gpio_to_irq(pdata->row_gpios[i]), keypad);
-                gpio_free(pdata->row_gpios[i]);
+        if (pdata->clustered_irq > 0) {
+                free_irq(pdata->clustered_irq, keypad);
+        } else {
+                for (i = 0; i < pdata->num_row_gpios; i++)
+                        free_irq(gpio_to_irq(pdata->row_gpios[i]), keypad);
         }
 
+        for (i = 0; i < pdata->num_row_gpios; i++)
+                gpio_free(pdata->row_gpios[i]);
+
         for (i = 0; i < pdata->num_col_gpios; i++)
                 gpio_free(pdata->col_gpios[i]);
 
diff --git a/drivers/input/keyboard/mcs_touchkey.c b/drivers/input/keyboard/mcs_touchkey.c
new file mode 100644
index 000000000000..63b849d7e90b
--- /dev/null
+++ b/drivers/input/keyboard/mcs_touchkey.c
@@ -0,0 +1,239 @@
+/*
+ * mcs_touchkey.c - Touchkey driver for MELFAS MCS5000/5080 controller
+ *
+ * Copyright (C) 2010 Samsung Electronics Co.Ltd
+ * Author: HeungJun Kim <riverful.kim@samsung.com>
+ * Author: Joonyoung Shim <jy0922.shim@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.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/i2c/mcs.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+
+/* MCS5000 Touchkey */
+#define MCS5000_TOUCHKEY_STATUS         0x04
+#define MCS5000_TOUCHKEY_STATUS_PRESS   7
+#define MCS5000_TOUCHKEY_FW             0x0a
+#define MCS5000_TOUCHKEY_BASE_VAL       0x61
+
+/* MCS5080 Touchkey */
+#define MCS5080_TOUCHKEY_STATUS         0x00
+#define MCS5080_TOUCHKEY_STATUS_PRESS   3
+#define MCS5080_TOUCHKEY_FW             0x01
+#define MCS5080_TOUCHKEY_BASE_VAL       0x1
+
+enum mcs_touchkey_type {
+        MCS5000_TOUCHKEY,
+        MCS5080_TOUCHKEY,
+};
+
+struct mcs_touchkey_chip {
+        unsigned int status_reg;
+        unsigned int pressbit;
+        unsigned int press_invert;
+        unsigned int baseval;
+};
+
+struct mcs_touchkey_data {
+        struct i2c_client *client;
+        struct input_dev *input_dev;
+        struct mcs_touchkey_chip chip;
+        unsigned int key_code;
+        unsigned int key_val;
+        unsigned short keycodes[];
+};
+
+static irqreturn_t mcs_touchkey_interrupt(int irq, void *dev_id)
+{
+        struct mcs_touchkey_data *data = dev_id;
+        struct mcs_touchkey_chip *chip = &data->chip;
+        struct i2c_client *client = data->client;
+        struct input_dev *input = data->input_dev;
+        unsigned int key_val;
+        unsigned int pressed;
+        int val;
+
+        val = i2c_smbus_read_byte_data(client, chip->status_reg);
+        if (val < 0) {
+                dev_err(&client->dev, "i2c read error [%d]\n", val);
+                goto out;
+        }
+
+        pressed = (val & (1 << chip->pressbit)) >> chip->pressbit;
+        if (chip->press_invert)
+                pressed ^= chip->press_invert;
+
+        /* key_val is 0 when released, so we should use key_val of press. */
+        if (pressed) {
+                key_val = val & (0xff >> (8 - chip->pressbit));
+                if (!key_val)
+                        goto out;
+                key_val -= chip->baseval;
+                data->key_code = data->keycodes[key_val];
+                data->key_val = key_val;
+        }
+
+        input_event(input, EV_MSC, MSC_SCAN, data->key_val);
+        input_report_key(input, data->key_code, pressed);
+        input_sync(input);
+
+        dev_dbg(&client->dev, "key %d %d %s\n", data->key_val, data->key_code,
+                pressed ? "pressed" : "released");
+
+ out:
+        return IRQ_HANDLED;
+}
+
+static int __devinit mcs_touchkey_probe(struct i2c_client *client,
+                const struct i2c_device_id *id)
+{
+        const struct mcs_platform_data *pdata;
+        struct mcs_touchkey_data *data;
+        struct input_dev *input_dev;
+        unsigned int fw_reg;
+        int fw_ver;
+        int error;
+        int i;
+
+        pdata = client->dev.platform_data;
+        if (!pdata) {
+                dev_err(&client->dev, "no platform data defined\n");
+                return -EINVAL;
+        }
+
+        data = kzalloc(sizeof(struct mcs_touchkey_data) +
+                        sizeof(data->keycodes[0]) * (pdata->key_maxval + 1),
+                        GFP_KERNEL);
+        input_dev = input_allocate_device();
+        if (!data || !input_dev) {
+                dev_err(&client->dev, "Failed to allocate memory\n");
+                error = -ENOMEM;
+                goto err_free_mem;
+        }
+
+        data->client = client;
+        data->input_dev = input_dev;
+
+        if (id->driver_data == MCS5000_TOUCHKEY) {
+                data->chip.status_reg = MCS5000_TOUCHKEY_STATUS;
+                data->chip.pressbit = MCS5000_TOUCHKEY_STATUS_PRESS;
+                data->chip.baseval = MCS5000_TOUCHKEY_BASE_VAL;
+                fw_reg = MCS5000_TOUCHKEY_FW;
+        } else {
+                data->chip.status_reg = MCS5080_TOUCHKEY_STATUS;
+                data->chip.pressbit = MCS5080_TOUCHKEY_STATUS_PRESS;
+                data->chip.press_invert = 1;
+                data->chip.baseval = MCS5080_TOUCHKEY_BASE_VAL;
+                fw_reg = MCS5080_TOUCHKEY_FW;
+        }
+
+        fw_ver = i2c_smbus_read_byte_data(client, fw_reg);
+        if (fw_ver < 0) {
+                error = fw_ver;
+                dev_err(&client->dev, "i2c read error[%d]\n", error);
+                goto err_free_mem;
+        }
+        dev_info(&client->dev, "Firmware version: %d\n", fw_ver);
+
+        input_dev->name = "MELPAS MCS Touchkey";
+        input_dev->id.bustype = BUS_I2C;
+        input_dev->dev.parent = &client->dev;
+        input_dev->evbit[0] = BIT_MASK(EV_KEY);
+        if (!pdata->no_autorepeat)
+                input_dev->evbit[0] |= BIT_MASK(EV_REP);
+        input_dev->keycode = data->keycodes;
+        input_dev->keycodesize = sizeof(data->keycodes[0]);
+        input_dev->keycodemax = pdata->key_maxval + 1;
+
+        for (i = 0; i < pdata->keymap_size; i++) {
+                unsigned int val = MCS_KEY_VAL(pdata->keymap[i]);
+                unsigned int code = MCS_KEY_CODE(pdata->keymap[i]);
+
+                data->keycodes[val] = code;
+                __set_bit(code, input_dev->keybit);
+        }
+
+        input_set_capability(input_dev, EV_MSC, MSC_SCAN);
+        input_set_drvdata(input_dev, data);
+
+        if (pdata->cfg_pin)
+                pdata->cfg_pin();
+
+        error = request_threaded_irq(client->irq, NULL, mcs_touchkey_interrupt,
+                        IRQF_TRIGGER_FALLING, client->dev.driver->name, data);
+        if (error) {
+                dev_err(&client->dev, "Failed to register interrupt\n");
+                goto err_free_mem;
+        }
+
+        error = input_register_device(input_dev);
+        if (error)
+                goto err_free_irq;
+
+        i2c_set_clientdata(client, data);
+        return 0;
+
+err_free_irq:
+        free_irq(client->irq, data);
+err_free_mem:
+        input_free_device(input_dev);
+        kfree(data);
+        return error;
+}
+
+static int __devexit mcs_touchkey_remove(struct i2c_client *client)
+{
+        struct mcs_touchkey_data *data = i2c_get_clientdata(client);
+
+        free_irq(client->irq, data);
+        input_unregister_device(data->input_dev);
+        kfree(data);
+
+        return 0;
+}
+
+static const struct i2c_device_id mcs_touchkey_id[] = {
+        { "mcs5000_touchkey", MCS5000_TOUCHKEY },
+        { "mcs5080_touchkey", MCS5080_TOUCHKEY },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, mcs_touchkey_id);
+
+static struct i2c_driver mcs_touchkey_driver = {
+        .driver = {
+                .name   = "mcs_touchkey",
+                .owner  = THIS_MODULE,
+        },
+        .probe          = mcs_touchkey_probe,
+        .remove         = __devexit_p(mcs_touchkey_remove),
+        .id_table       = mcs_touchkey_id,
+};
+
+static int __init mcs_touchkey_init(void)
+{
+        return i2c_add_driver(&mcs_touchkey_driver);
+}
+
+static void __exit mcs_touchkey_exit(void)
+{
+        i2c_del_driver(&mcs_touchkey_driver);
+}
+
+module_init(mcs_touchkey_init);
+module_exit(mcs_touchkey_exit);
+
+/* Module information */
+MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
+MODULE_AUTHOR("HeungJun Kim <riverful.kim@samsung.com>");
+MODULE_DESCRIPTION("Touchkey driver for MELFAS MCS5000/5080 controller");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/keyboard/samsung-keypad.c b/drivers/input/keyboard/samsung-keypad.c
new file mode 100644
index 000000000000..f689f49e3109
--- /dev/null
+++ b/drivers/input/keyboard/samsung-keypad.c
@@ -0,0 +1,491 @@
+/*
+ * Samsung keypad driver
+ *
+ * Copyright (C) 2010 Samsung Electronics Co.Ltd
+ * Author: Joonyoung Shim <jy0922.shim@samsung.com>
+ * Author: Donghwa Lee <dh09.lee@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.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <plat/keypad.h>
+
+#define SAMSUNG_KEYIFCON                        0x00
+#define SAMSUNG_KEYIFSTSCLR                     0x04
+#define SAMSUNG_KEYIFCOL                        0x08
+#define SAMSUNG_KEYIFROW                        0x0c
+#define SAMSUNG_KEYIFFC                         0x10
+
+/* SAMSUNG_KEYIFCON */
+#define SAMSUNG_KEYIFCON_INT_F_EN               (1 << 0)
+#define SAMSUNG_KEYIFCON_INT_R_EN               (1 << 1)
+#define SAMSUNG_KEYIFCON_DF_EN                  (1 << 2)
+#define SAMSUNG_KEYIFCON_FC_EN                  (1 << 3)
+#define SAMSUNG_KEYIFCON_WAKEUPEN               (1 << 4)
+
+/* SAMSUNG_KEYIFSTSCLR */
+#define SAMSUNG_KEYIFSTSCLR_P_INT_MASK          (0xff << 0)
+#define SAMSUNG_KEYIFSTSCLR_R_INT_MASK          (0xff << 8)
+#define SAMSUNG_KEYIFSTSCLR_R_INT_OFFSET        8
+#define S5PV210_KEYIFSTSCLR_P_INT_MASK          (0x3fff << 0)
+#define S5PV210_KEYIFSTSCLR_R_INT_MASK          (0x3fff << 16)
+#define S5PV210_KEYIFSTSCLR_R_INT_OFFSET        16
+
+/* SAMSUNG_KEYIFCOL */
+#define SAMSUNG_KEYIFCOL_MASK                   (0xff << 0)
+#define S5PV210_KEYIFCOLEN_MASK                 (0xff << 8)
+
+/* SAMSUNG_KEYIFROW */
+#define SAMSUNG_KEYIFROW_MASK                   (0xff << 0)
+#define S5PV210_KEYIFROW_MASK                   (0x3fff << 0)
+
+/* SAMSUNG_KEYIFFC */
+#define SAMSUNG_KEYIFFC_MASK                    (0x3ff << 0)
+
+enum samsung_keypad_type {
+        KEYPAD_TYPE_SAMSUNG,
+        KEYPAD_TYPE_S5PV210,
+};
+
+struct samsung_keypad {
+        struct input_dev *input_dev;
+        struct clk *clk;
+        void __iomem *base;
+        wait_queue_head_t wait;
+        bool stopped;
+        int irq;
+        unsigned int row_shift;
+        unsigned int rows;
+        unsigned int cols;
+        unsigned int row_state[SAMSUNG_MAX_COLS];
+        unsigned short keycodes[];
+};
+
+static int samsung_keypad_is_s5pv210(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        enum samsung_keypad_type type =
+                platform_get_device_id(pdev)->driver_data;
+
+        return type == KEYPAD_TYPE_S5PV210;
+}
+
+static void samsung_keypad_scan(struct samsung_keypad *keypad,
+                                unsigned int *row_state)
+{
+        struct device *dev = keypad->input_dev->dev.parent;
+        unsigned int col;
+        unsigned int val;
+
+        for (col = 0; col < keypad->cols; col++) {
+                if (samsung_keypad_is_s5pv210(dev)) {
+                        val = S5PV210_KEYIFCOLEN_MASK;
+                        val &= ~(1 << col) << 8;
+                } else {
+                        val = SAMSUNG_KEYIFCOL_MASK;
+                        val &= ~(1 << col);
+                }
+
+                writel(val, keypad->base + SAMSUNG_KEYIFCOL);
+                mdelay(1);
+
+                val = readl(keypad->base + SAMSUNG_KEYIFROW);
+                row_state[col] = ~val & ((1 << keypad->rows) - 1);
+        }
+
+        /* KEYIFCOL reg clear */
+        writel(0, keypad->base + SAMSUNG_KEYIFCOL);
+}
+
+static bool samsung_keypad_report(struct samsung_keypad *keypad,
+                                  unsigned int *row_state)
+{
+        struct input_dev *input_dev = keypad->input_dev;
+        unsigned int changed;
+        unsigned int pressed;
+        unsigned int key_down = 0;
+        unsigned int val;
+        unsigned int col, row;
+
+        for (col = 0; col < keypad->cols; col++) {
+                changed = row_state[col] ^ keypad->row_state[col];
+                key_down |= row_state[col];
+                if (!changed)
+                        continue;
+
+                for (row = 0; row < keypad->rows; row++) {
+                        if (!(changed & (1 << row)))
+                                continue;
+
+                        pressed = row_state[col] & (1 << row);
+
+                        dev_dbg(&keypad->input_dev->dev,
+                                "key %s, row: %d, col: %d\n",
+                                pressed ? "pressed" : "released", row, col);
+
+                        val = MATRIX_SCAN_CODE(row, col, keypad->row_shift);
+
+                        input_event(input_dev, EV_MSC, MSC_SCAN, val);
+                        input_report_key(input_dev,
+                                        keypad->keycodes[val], pressed);
+                }
+                input_sync(keypad->input_dev);
+        }
+
+        memcpy(keypad->row_state, row_state, sizeof(keypad->row_state));
+
+        return key_down;
+}
+
+static irqreturn_t samsung_keypad_irq(int irq, void *dev_id)
+{
+        struct samsung_keypad *keypad = dev_id;
+        unsigned int row_state[SAMSUNG_MAX_COLS];
+        unsigned int val;
+        bool key_down;
+
+        do {
+                val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR);
+                /* Clear interrupt. */
+                writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);
+
+                samsung_keypad_scan(keypad, row_state);
+
+                key_down = samsung_keypad_report(keypad, row_state);
+                if (key_down)
+                        wait_event_timeout(keypad->wait, keypad->stopped,
+                                           msecs_to_jiffies(50));
+
+        } while (key_down && !keypad->stopped);
+
+        return IRQ_HANDLED;
+}
+
+static void samsung_keypad_start(struct samsung_keypad *keypad)
+{
+        unsigned int val;
+
+        /* Tell IRQ thread that it may poll the device. */
+        keypad->stopped = false;
+
+        clk_enable(keypad->clk);
+
+        /* Enable interrupt bits. */
+        val = readl(keypad->base + SAMSUNG_KEYIFCON);
+        val |= SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN;
+        writel(val, keypad->base + SAMSUNG_KEYIFCON);
+
+        /* KEYIFCOL reg clear. */
+        writel(0, keypad->base + SAMSUNG_KEYIFCOL);
+}
+
+static void samsung_keypad_stop(struct samsung_keypad *keypad)
+{
+        unsigned int val;
+
+        /* Signal IRQ thread to stop polling and disable the handler. */
+        keypad->stopped = true;
+        wake_up(&keypad->wait);
+        disable_irq(keypad->irq);
+
+        /* Clear interrupt. */
+        writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);
+
+        /* Disable interrupt bits. */
+        val = readl(keypad->base + SAMSUNG_KEYIFCON);
+        val &= ~(SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN);
+        writel(val, keypad->base + SAMSUNG_KEYIFCON);
+
+        clk_disable(keypad->clk);
+
+        /*
+         * Now that chip should not generate interrupts we can safely
+         * re-enable the handler.
+         */
+        enable_irq(keypad->irq);
+}
+
+static int samsung_keypad_open(struct input_dev *input_dev)
+{
+        struct samsung_keypad *keypad = input_get_drvdata(input_dev);
+
+        samsung_keypad_start(keypad);
+
+        return 0;
+}
+
+static void samsung_keypad_close(struct input_dev *input_dev)
+{
+        struct samsung_keypad *keypad = input_get_drvdata(input_dev);
+
+        samsung_keypad_stop(keypad);
+}
+
+static int __devinit samsung_keypad_probe(struct platform_device *pdev)
+{
+        const struct samsung_keypad_platdata *pdata;
+        const struct matrix_keymap_data *keymap_data;
+        struct samsung_keypad *keypad;
+        struct resource *res;
+        struct input_dev *input_dev;
+        unsigned int row_shift;
+        unsigned int keymap_size;
+        int error;
+
+        pdata = pdev->dev.platform_data;
+        if (!pdata) {
+                dev_err(&pdev->dev, "no platform data defined\n");
+                return -EINVAL;
+        }
+
+        keymap_data = pdata->keymap_data;
+        if (!keymap_data) {
+                dev_err(&pdev->dev, "no keymap data defined\n");
+                return -EINVAL;
+        }
+
+        if (!pdata->rows || pdata->rows > SAMSUNG_MAX_ROWS)
+                return -EINVAL;
+
+        if (!pdata->cols || pdata->cols > SAMSUNG_MAX_COLS)
+                return -EINVAL;
+
+        /* initialize the gpio */
+        if (pdata->cfg_gpio)
+                pdata->cfg_gpio(pdata->rows, pdata->cols);
+
+        row_shift = get_count_order(pdata->cols);
+        keymap_size = (pdata->rows << row_shift) * sizeof(keypad->keycodes[0]);
+
+        keypad = kzalloc(sizeof(*keypad) + keymap_size, GFP_KERNEL);
+        input_dev = input_allocate_device();
+        if (!keypad || !input_dev) {
+                error = -ENOMEM;
+                goto err_free_mem;
+        }
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                error = -ENODEV;
+                goto err_free_mem;
+        }
+
+        keypad->base = ioremap(res->start, resource_size(res));
+        if (!keypad->base) {
+                error = -EBUSY;
+                goto err_free_mem;
+        }
+
+        keypad->clk = clk_get(&pdev->dev, "keypad");
+        if (IS_ERR(keypad->clk)) {
+                dev_err(&pdev->dev, "failed to get keypad clk\n");
+                error = PTR_ERR(keypad->clk);
+                goto err_unmap_base;
+        }
+
+        keypad->input_dev = input_dev;
+        keypad->row_shift = row_shift;
+        keypad->rows = pdata->rows;
+        keypad->cols = pdata->cols;
+        init_waitqueue_head(&keypad->wait);
+
+        input_dev->name = pdev->name;
+        input_dev->id.bustype = BUS_HOST;
+        input_dev->dev.parent = &pdev->dev;
+        input_set_drvdata(input_dev, keypad);
+
+        input_dev->open = samsung_keypad_open;
+        input_dev->close = samsung_keypad_close;
+
+        input_dev->evbit[0] = BIT_MASK(EV_KEY);
+        if (!pdata->no_autorepeat)
+                input_dev->evbit[0] |= BIT_MASK(EV_REP);
+
+        input_set_capability(input_dev, EV_MSC, MSC_SCAN);
+
+        input_dev->keycode = keypad->keycodes;
+        input_dev->keycodesize = sizeof(keypad->keycodes[0]);
+        input_dev->keycodemax = pdata->rows << row_shift;
+
+        matrix_keypad_build_keymap(keymap_data, row_shift,
+                        input_dev->keycode, input_dev->keybit);
+
+        keypad->irq = platform_get_irq(pdev, 0);
+        if (keypad->irq < 0) {
+                error = keypad->irq;
+                goto err_put_clk;
+        }
+
+        error = request_threaded_irq(keypad->irq, NULL, samsung_keypad_irq,
+                        IRQF_ONESHOT, dev_name(&pdev->dev), keypad);
+        if (error) {
+                dev_err(&pdev->dev, "failed to register keypad interrupt\n");
+                goto err_put_clk;
+        }
+
+        error = input_register_device(keypad->input_dev);
+        if (error)
+                goto err_free_irq;
+
+        device_init_wakeup(&pdev->dev, pdata->wakeup);
+        platform_set_drvdata(pdev, keypad);
+        return 0;
+
+err_free_irq:
+        free_irq(keypad->irq, keypad);
+err_put_clk:
+        clk_put(keypad->clk);
+err_unmap_base:
+        iounmap(keypad->base);
+err_free_mem:
+        input_free_device(input_dev);
+        kfree(keypad);
+
+        return error;
+}
+
+static int __devexit samsung_keypad_remove(struct platform_device *pdev)
+{
+        struct samsung_keypad *keypad = platform_get_drvdata(pdev);
+
+        device_init_wakeup(&pdev->dev, 0);
+        platform_set_drvdata(pdev, NULL);
+
+        input_unregister_device(keypad->input_dev);
+
+        /*
+         * It is safe to free IRQ after unregistering device because
+         * samsung_keypad_close will shut off interrupts.
+         */
+        free_irq(keypad->irq, keypad);
+
+        clk_put(keypad->clk);
+
+        iounmap(keypad->base);
+        kfree(keypad);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static void samsung_keypad_toggle_wakeup(struct samsung_keypad *keypad,
+                                         bool enable)
+{
+        struct device *dev = keypad->input_dev->dev.parent;
+        unsigned int val;
+
+        clk_enable(keypad->clk);
+
+        val = readl(keypad->base + SAMSUNG_KEYIFCON);
+        if (enable) {
+                val |= SAMSUNG_KEYIFCON_WAKEUPEN;
+                if (device_may_wakeup(dev))
+                        enable_irq_wake(keypad->irq);
+        } else {
+                val &= ~SAMSUNG_KEYIFCON_WAKEUPEN;
+                if (device_may_wakeup(dev))
+                        disable_irq_wake(keypad->irq);
+        }
+        writel(val, keypad->base + SAMSUNG_KEYIFCON);
+
+        clk_disable(keypad->clk);
+}
+
+static int samsung_keypad_suspend(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct samsung_keypad *keypad = platform_get_drvdata(pdev);
+        struct input_dev *input_dev = keypad->input_dev;
+
+        mutex_lock(&input_dev->mutex);
+
+        if (input_dev->users)
+                samsung_keypad_stop(keypad);
+
+        samsung_keypad_toggle_wakeup(keypad, true);
+
+        mutex_unlock(&input_dev->mutex);
+
+        return 0;
+}
+
+static int samsung_keypad_resume(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct samsung_keypad *keypad = platform_get_drvdata(pdev);
+        struct input_dev *input_dev = keypad->input_dev;
+
+        mutex_lock(&input_dev->mutex);
+
+        samsung_keypad_toggle_wakeup(keypad, false);
+
+        if (input_dev->users)
+                samsung_keypad_start(keypad);
+
+        mutex_unlock(&input_dev->mutex);
+
+        return 0;
+}
+
+static const struct dev_pm_ops samsung_keypad_pm_ops = {
+        .suspend        = samsung_keypad_suspend,
+        .resume         = samsung_keypad_resume,
+};
+#endif
+
+static struct platform_device_id samsung_keypad_driver_ids[] = {
+        {
+                .name           = "samsung-keypad",
+                .driver_data    = KEYPAD_TYPE_SAMSUNG,
+        }, {
+                .name           = "s5pv210-keypad",
+                .driver_data    = KEYPAD_TYPE_S5PV210,
+        },
+        { },
+};
+MODULE_DEVICE_TABLE(platform, samsung_keypad_driver_ids);
+
+static struct platform_driver samsung_keypad_driver = {
+        .probe          = samsung_keypad_probe,
+        .remove         = __devexit_p(samsung_keypad_remove),
+        .driver         = {
+                .name   = "samsung-keypad",
+                .owner  = THIS_MODULE,
+#ifdef CONFIG_PM
+                .pm     = &samsung_keypad_pm_ops,
+#endif
+        },
+        .id_table       = samsung_keypad_driver_ids,
+};
+
+static int __init samsung_keypad_init(void)
+{
+        return platform_driver_register(&samsung_keypad_driver);
+}
+module_init(samsung_keypad_init);
+
+static void __exit samsung_keypad_exit(void)
+{
+        platform_driver_unregister(&samsung_keypad_driver);
+}
+module_exit(samsung_keypad_exit);
+
+MODULE_DESCRIPTION("Samsung keypad driver");
+MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
+MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:samsung-keypad");