Merge branch 'next' into for-linus

50 files changed, 5051 insertions, 756 deletions

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 9ddafc30f432..b9723c735c67 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -534,6 +534,80 @@ static int handle_eviocgbit(struct input_dev *dev,
 }
 #undef OLD_KEY_MAX
 
+static int evdev_handle_get_keycode(struct input_dev *dev,
+                                    void __user *p, size_t size)
+{
+        struct input_keymap_entry ke;
+        int error;
+
+        memset(&ke, 0, sizeof(ke));
+
+        if (size == sizeof(unsigned int[2])) {
+                /* legacy case */
+                int __user *ip = (int __user *)p;
+
+                if (copy_from_user(ke.scancode, p, sizeof(unsigned int)))
+                        return -EFAULT;
+
+                ke.len = sizeof(unsigned int);
+                ke.flags = 0;
+
+                error = input_get_keycode(dev, &ke);
+                if (error)
+                        return error;
+
+                if (put_user(ke.keycode, ip + 1))
+                        return -EFAULT;
+
+        } else {
+                size = min(size, sizeof(ke));
+
+                if (copy_from_user(&ke, p, size))
+                        return -EFAULT;
+
+                error = input_get_keycode(dev, &ke);
+                if (error)
+                        return error;
+
+                if (copy_to_user(p, &ke, size))
+                        return -EFAULT;
+        }
+        return 0;
+}
+
+static int evdev_handle_set_keycode(struct input_dev *dev,
+                                    void __user *p, size_t size)
+{
+        struct input_keymap_entry ke;
+
+        memset(&ke, 0, sizeof(ke));
+
+        if (size == sizeof(unsigned int[2])) {
+                /* legacy case */
+                int __user *ip = (int __user *)p;
+
+                if (copy_from_user(ke.scancode, p, sizeof(unsigned int)))
+                        return -EFAULT;
+
+                if (get_user(ke.keycode, ip + 1))
+                        return -EFAULT;
+
+                ke.len = sizeof(unsigned int);
+                ke.flags = 0;
+
+        } else {
+                size = min(size, sizeof(ke));
+
+                if (copy_from_user(&ke, p, size))
+                        return -EFAULT;
+
+                if (ke.len > sizeof(ke.scancode))
+                        return -EINVAL;
+        }
+
+        return input_set_keycode(dev, &ke);
+}
+
 static long evdev_do_ioctl(struct file *file, unsigned int cmd,
                            void __user *p, int compat_mode)
 {
@@ -580,25 +654,6 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd,
 
                 return 0;
 
-        case EVIOCGKEYCODE:
-                if (get_user(t, ip))
-                        return -EFAULT;
-
-                error = input_get_keycode(dev, t, &v);
-                if (error)
-                        return error;
-
-                if (put_user(v, ip + 1))
-                        return -EFAULT;
-
-                return 0;
-
-        case EVIOCSKEYCODE:
-                if (get_user(t, ip) || get_user(v, ip + 1))
-                        return -EFAULT;
-
-                return input_set_keycode(dev, t, v);
-
         case EVIOCRMFF:
                 return input_ff_erase(dev, (int)(unsigned long) p, file);
 
@@ -620,7 +675,6 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd,
 
         /* Now check variable-length commands */
 #define EVIOC_MASK_SIZE(nr)     ((nr) & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT))
-
         switch (EVIOC_MASK_SIZE(cmd)) {
 
         case EVIOCGKEY(0):
@@ -654,6 +708,12 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd,
                         return -EFAULT;
 
                 return error;
+
+        case EVIOC_MASK_SIZE(EVIOCGKEYCODE):
+                return evdev_handle_get_keycode(dev, p, size);
+
+        case EVIOC_MASK_SIZE(EVIOCSKEYCODE):
+                return evdev_handle_set_keycode(dev, p, size);
         }
 
         /* Multi-number variable-length handlers */
diff --git a/drivers/input/gameport/emu10k1-gp.c b/drivers/input/gameport/emu10k1-gp.c
index 7392992da424..422aa0a6b77f 100644
--- a/drivers/input/gameport/emu10k1-gp.c
+++ b/drivers/input/gameport/emu10k1-gp.c
@@ -59,44 +59,52 @@ MODULE_DEVICE_TABLE(pci, emu_tbl);
 
 static int __devinit emu_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
-        int ioport, iolen;
         struct emu *emu;
         struct gameport *port;
-
-        if (pci_enable_device(pdev))
-                return -EBUSY;
-
-        ioport = pci_resource_start(pdev, 0);
-        iolen = pci_resource_len(pdev, 0);
-
-        if (!request_region(ioport, iolen, "emu10k1-gp"))
-                return -EBUSY;
+        int error;
 
         emu = kzalloc(sizeof(struct emu), GFP_KERNEL);
         port = gameport_allocate_port();
         if (!emu || !port) {
                 printk(KERN_ERR "emu10k1-gp: Memory allocation failed\n");
-                release_region(ioport, iolen);
-                kfree(emu);
-                gameport_free_port(port);
-                return -ENOMEM;
+                error = -ENOMEM;
+                goto err_out_free;
         }
 
-        emu->io = ioport;
-        emu->size = iolen;
+        error = pci_enable_device(pdev);
+        if (error)
+                goto err_out_free;
+
+        emu->io = pci_resource_start(pdev, 0);
+        emu->size = pci_resource_len(pdev, 0);
+
         emu->dev = pdev;
         emu->gameport = port;
 
         gameport_set_name(port, "EMU10K1");
         gameport_set_phys(port, "pci%s/gameport0", pci_name(pdev));
         port->dev.parent = &pdev->dev;
-        port->io = ioport;
+        port->io = emu->io;
+
+        if (!request_region(emu->io, emu->size, "emu10k1-gp")) {
+                printk(KERN_ERR "emu10k1-gp: unable to grab region 0x%x-0x%x\n",
+                        emu->io, emu->io + emu->size - 1);
+                error = -EBUSY;
+                goto err_out_disable_dev;
+        }
 
         pci_set_drvdata(pdev, emu);
 
         gameport_register_port(port);
 
         return 0;
+
+ err_out_disable_dev:
+        pci_disable_device(pdev);
+ err_out_free:
+        gameport_free_port(port);
+        kfree(emu);
+        return error;
 }
 
 static void __devexit emu_remove(struct pci_dev *pdev)
@@ -106,6 +114,8 @@ static void __devexit emu_remove(struct pci_dev *pdev)
         gameport_unregister_port(emu->gameport);
         release_region(emu->io, emu->size);
         kfree(emu);
+
+        pci_disable_device(pdev);
 }
 
 static struct pci_driver emu_driver = {
diff --git a/drivers/input/gameport/fm801-gp.c b/drivers/input/gameport/fm801-gp.c
index 14d3f3e208a2..a3b70ff21018 100644
--- a/drivers/input/gameport/fm801-gp.c
+++ b/drivers/input/gameport/fm801-gp.c
@@ -133,11 +133,11 @@ static void __devexit fm801_gp_remove(struct pci_dev *pci)
 {
         struct fm801_gp *gp = pci_get_drvdata(pci);
 
-        if (gp) {
-                gameport_unregister_port(gp->gameport);
-                release_resource(gp->res_port);
-                kfree(gp);
-        }
+        gameport_unregister_port(gp->gameport);
+        release_resource(gp->res_port);
+        kfree(gp);
+
+        pci_disable_device(pci);
 }
 
 static const struct pci_device_id fm801_gp_id_table[] = {
diff --git a/drivers/input/input.c b/drivers/input/input.c
index ab6982056518..832771e73663 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -171,7 +171,7 @@ static int input_handle_abs_event(struct input_dev *dev,
         if (code == ABS_MT_SLOT) {
                 /*
                  * "Stage" the event; we'll flush it later, when we
-                 * get actiual touch data.
+                 * get actual touch data.
                  */
                 if (*pval >= 0 && *pval < dev->mtsize)
                         dev->slot = *pval;
@@ -188,7 +188,7 @@ static int input_handle_abs_event(struct input_dev *dev,
                 pold = &mtslot->abs[code - ABS_MT_FIRST];
         } else {
                 /*
-                 * Bypass filtering for multitouch events when
+                 * Bypass filtering for multi-touch events when
                  * not employing slots.
                  */
                 pold = NULL;
@@ -634,78 +634,141 @@ static void input_disconnect_device(struct input_dev *dev)
         spin_unlock_irq(&dev->event_lock);
 }
 
-static int input_fetch_keycode(struct input_dev *dev, int scancode)
+/**
+ * input_scancode_to_scalar() - converts scancode in &struct input_keymap_entry
+ * @ke: keymap entry containing scancode to be converted.
+ * @scancode: pointer to the location where converted scancode should
+ *      be stored.
+ *
+ * This function is used to convert scancode stored in &struct keymap_entry
+ * into scalar form understood by legacy keymap handling methods. These
+ * methods expect scancodes to be represented as 'unsigned int'.
+ */
+int input_scancode_to_scalar(const struct input_keymap_entry *ke,
+                             unsigned int *scancode)
+{
+        switch (ke->len) {
+        case 1:
+                *scancode = *((u8 *)ke->scancode);
+                break;
+
+        case 2:
+                *scancode = *((u16 *)ke->scancode);
+                break;
+
+        case 4:
+                *scancode = *((u32 *)ke->scancode);
+                break;
+
+        default:
+                return -EINVAL;
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL(input_scancode_to_scalar);
+
+/*
+ * Those routines handle the default case where no [gs]etkeycode() is
+ * defined. In this case, an array indexed by the scancode is used.
+ */
+
+static unsigned int input_fetch_keycode(struct input_dev *dev,
+                                        unsigned int index)
 {
         switch (dev->keycodesize) {
-                case 1:
-                        return ((u8 *)dev->keycode)[scancode];
+        case 1:
+                return ((u8 *)dev->keycode)[index];
 
-                case 2:
-                        return ((u16 *)dev->keycode)[scancode];
+        case 2:
+                return ((u16 *)dev->keycode)[index];
 
-                default:
-                        return ((u32 *)dev->keycode)[scancode];
+        default:
+                return ((u32 *)dev->keycode)[index];
         }
 }
 
 static int input_default_getkeycode(struct input_dev *dev,
-                                    unsigned int scancode,
-                                    unsigned int *keycode)
+                                    struct input_keymap_entry *ke)
 {
+        unsigned int index;
+        int error;
+
         if (!dev->keycodesize)
                 return -EINVAL;
 
-        if (scancode >= dev->keycodemax)
+        if (ke->flags & INPUT_KEYMAP_BY_INDEX)
+                index = ke->index;
+        else {
+                error = input_scancode_to_scalar(ke, &index);
+                if (error)
+                        return error;
+        }
+
+        if (index >= dev->keycodemax)
                 return -EINVAL;
 
-        *keycode = input_fetch_keycode(dev, scancode);
+        ke->keycode = input_fetch_keycode(dev, index);
+        ke->index = index;
+        ke->len = sizeof(index);
+        memcpy(ke->scancode, &index, sizeof(index));
 
         return 0;
 }
 
 static int input_default_setkeycode(struct input_dev *dev,
-                                    unsigned int scancode,
-                                    unsigned int keycode)
+                                    const struct input_keymap_entry *ke,
+                                    unsigned int *old_keycode)
 {
-        int old_keycode;
+        unsigned int index;
+        int error;
         int i;
 
-        if (scancode >= dev->keycodemax)
+        if (!dev->keycodesize)
                 return -EINVAL;
 
-        if (!dev->keycodesize)
+        if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
+                index = ke->index;
+        } else {
+                error = input_scancode_to_scalar(ke, &index);
+                if (error)
+                        return error;
+        }
+
+        if (index >= dev->keycodemax)
                 return -EINVAL;
 
-        if (dev->keycodesize < sizeof(keycode) && (keycode >> (dev->keycodesize * 8)))
+        if (dev->keycodesize < sizeof(dev->keycode) &&
+                        (ke->keycode >> (dev->keycodesize * 8)))
                 return -EINVAL;
 
         switch (dev->keycodesize) {
                 case 1: {
                         u8 *k = (u8 *)dev->keycode;
-                        old_keycode = k[scancode];
-                        k[scancode] = keycode;
+                        *old_keycode = k[index];
+                        k[index] = ke->keycode;
                         break;
                 }
                 case 2: {
                         u16 *k = (u16 *)dev->keycode;
-                        old_keycode = k[scancode];
-                        k[scancode] = keycode;
+                        *old_keycode = k[index];
+                        k[index] = ke->keycode;
                         break;
                 }
                 default: {
                         u32 *k = (u32 *)dev->keycode;
-                        old_keycode = k[scancode];
-                        k[scancode] = keycode;
+                        *old_keycode = k[index];
+                        k[index] = ke->keycode;
                         break;
                 }
         }
 
-        __clear_bit(old_keycode, dev->keybit);
-        __set_bit(keycode, dev->keybit);
+        __clear_bit(*old_keycode, dev->keybit);
+        __set_bit(ke->keycode, dev->keybit);
 
         for (i = 0; i < dev->keycodemax; i++) {
-                if (input_fetch_keycode(dev, i) == old_keycode) {
-                        __set_bit(old_keycode, dev->keybit);
+                if (input_fetch_keycode(dev, i) == *old_keycode) {
+                        __set_bit(*old_keycode, dev->keybit);
                         break; /* Setting the bit twice is useless, so break */
                 }
         }
@@ -716,53 +779,86 @@ static int input_default_setkeycode(struct input_dev *dev,
 /**
  * input_get_keycode - retrieve keycode currently mapped to a given scancode
  * @dev: input device which keymap is being queried
- * @scancode: scancode (or its equivalent for device in question) for which
- *      keycode is needed
- * @keycode: result
+ * @ke: keymap entry
  *
  * This function should be called by anyone interested in retrieving current
- * keymap. Presently keyboard and evdev handlers use it.
+ * keymap. Presently evdev handlers use it.
  */
-int input_get_keycode(struct input_dev *dev,
-                      unsigned int scancode, unsigned int *keycode)
+int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke)
 {
         unsigned long flags;
         int retval;
 
         spin_lock_irqsave(&dev->event_lock, flags);
-        retval = dev->getkeycode(dev, scancode, keycode);
-        spin_unlock_irqrestore(&dev->event_lock, flags);
 
+        if (dev->getkeycode) {
+                /*
+                 * Support for legacy drivers, that don't implement the new
+                 * ioctls
+                 */
+                u32 scancode = ke->index;
+
+                memcpy(ke->scancode, &scancode, sizeof(scancode));
+                ke->len = sizeof(scancode);
+                retval = dev->getkeycode(dev, scancode, &ke->keycode);
+        } else {
+                retval = dev->getkeycode_new(dev, ke);
+        }
+
+        spin_unlock_irqrestore(&dev->event_lock, flags);
         return retval;
 }
 EXPORT_SYMBOL(input_get_keycode);
 
 /**
- * input_get_keycode - assign new keycode to a given scancode
+ * input_set_keycode - attribute a keycode to a given scancode
  * @dev: input device which keymap is being updated
- * @scancode: scancode (or its equivalent for device in question)
- * @keycode: new keycode to be assigned to the scancode
+ * @ke: new keymap entry
  *
  * This function should be called by anyone needing to update current
  * keymap. Presently keyboard and evdev handlers use it.
  */
 int input_set_keycode(struct input_dev *dev,
-                      unsigned int scancode, unsigned int keycode)
+                      const struct input_keymap_entry *ke)
 {
         unsigned long flags;
         unsigned int old_keycode;
         int retval;
 
-        if (keycode > KEY_MAX)
+        if (ke->keycode > KEY_MAX)
                 return -EINVAL;
 
         spin_lock_irqsave(&dev->event_lock, flags);
 
-        retval = dev->getkeycode(dev, scancode, &old_keycode);
-        if (retval)
-                goto out;
+        if (dev->setkeycode) {
+                /*
+                 * Support for legacy drivers, that don't implement the new
+                 * ioctls
+                 */
+                unsigned int scancode;
+
+                retval = input_scancode_to_scalar(ke, &scancode);
+                if (retval)
+                        goto out;
+
+                /*
+                 * We need to know the old scancode, in order to generate a
+                 * keyup effect, if the set operation happens successfully
+                 */
+                if (!dev->getkeycode) {
+                        retval = -EINVAL;
+                        goto out;
+                }
+
+                retval = dev->getkeycode(dev, scancode, &old_keycode);
+                if (retval)
+                        goto out;
+
+                retval = dev->setkeycode(dev, scancode, ke->keycode);
+        } else {
+                retval = dev->setkeycode_new(dev, ke, &old_keycode);
+        }
 
-        retval = dev->setkeycode(dev, scancode, keycode);
         if (retval)
                 goto out;
 
@@ -1601,7 +1697,7 @@ EXPORT_SYMBOL(input_free_device);
  *
  * This function allocates all necessary memory for MT slot handling in the
  * input device, and adds ABS_MT_SLOT to the device capabilities. All slots
- * are initially marked as unused iby setting ABS_MT_TRACKING_ID to -1.
+ * are initially marked as unused by setting ABS_MT_TRACKING_ID to -1.
  */
 int input_mt_create_slots(struct input_dev *dev, unsigned int num_slots)
 {
@@ -1759,11 +1855,11 @@ int input_register_device(struct input_dev *dev)
                 dev->rep[REP_PERIOD] = 33;
         }
 
-        if (!dev->getkeycode)
-                dev->getkeycode = input_default_getkeycode;
+        if (!dev->getkeycode && !dev->getkeycode_new)
+                dev->getkeycode_new = input_default_getkeycode;
 
-        if (!dev->setkeycode)
-                dev->setkeycode = input_default_setkeycode;
+        if (!dev->setkeycode && !dev->setkeycode_new)
+                dev->setkeycode_new = input_default_setkeycode;
 
         dev_set_name(&dev->dev, "input%ld",
                      (unsigned long) atomic_inc_return(&input_no) - 1);
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index 9cc488d21490..d63f5664e3fb 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -327,6 +327,16 @@ config KEYBOARD_NEWTON
           To compile this driver as a module, choose M here: the
           module will be called newtonkbd.
 
+config KEYBOARD_NOMADIK
+        tristate "ST-Ericsson Nomadik SKE keyboard"
+        depends on PLAT_NOMADIK
+        help
+          Say Y here if you want to use a keypad provided on the SKE controller
+          used on the Ux500 and Nomadik platforms
+
+          To compile this driver as a module, choose M here: the
+          module will be called nmk-ske-keypad.
+
 config KEYBOARD_OPENCORES
         tristate "OpenCores Keyboard Controller"
         help
@@ -424,6 +434,15 @@ config KEYBOARD_OMAP
           To compile this driver as a module, choose M here: the
           module will be called omap-keypad.
 
+config KEYBOARD_OMAP4
+        tristate "TI OMAP4 keypad support"
+        depends on ARCH_OMAP4
+        help
+          Say Y here if you want to use the OMAP4 keypad.
+
+          To compile this driver as a module, choose M here: the
+          module will be called omap4-keypad.
+
 config KEYBOARD_TWL4030
         tristate "TI TWL4030/TWL5030/TPS659x0 keypad support"
         depends on TWL4030_CORE
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 504b591be0cd..c13809c5c3a7 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -28,7 +28,9 @@ 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-$(CONFIG_KEYBOARD_NOMADIK)          += nomadik-ske-keypad.o
 obj-$(CONFIG_KEYBOARD_OMAP)             += omap-keypad.o
+obj-$(CONFIG_KEYBOARD_OMAP4)            += omap4-keypad.o
 obj-$(CONFIG_KEYBOARD_OPENCORES)        += opencores-kbd.o
 obj-$(CONFIG_KEYBOARD_PXA27x)           += pxa27x_keypad.o
 obj-$(CONFIG_KEYBOARD_PXA930_ROTARY)    += pxa930_rotary.o
diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
index d6918cb966c0..b92d1cd5cba1 100644
--- a/drivers/input/keyboard/adp5588-keys.c
+++ b/drivers/input/keyboard/adp5588-keys.c
@@ -660,7 +660,7 @@ static const struct dev_pm_ops adp5588_dev_pm_ops = {
 #endif
 
 static const struct i2c_device_id adp5588_id[] = {
-        { KBUILD_MODNAME, 0 },
+        { "adp5588-keys", 0 },
         { "adp5587-keys", 0 },
         { }
 };
diff --git a/drivers/input/keyboard/hil_kbd.c b/drivers/input/keyboard/hil_kbd.c
index 19fa94af207a..fed31e0947a1 100644
--- a/drivers/input/keyboard/hil_kbd.c
+++ b/drivers/input/keyboard/hil_kbd.c
@@ -570,6 +570,8 @@ static struct serio_device_id hil_dev_ids[] = {
         { 0 }
 };
 
+MODULE_DEVICE_TABLE(serio, hil_dev_ids);
+
 static struct serio_driver hil_serio_drv = {
         .driver         = {
                 .name   = "hil_dev",
diff --git a/drivers/input/keyboard/nomadik-ske-keypad.c b/drivers/input/keyboard/nomadik-ske-keypad.c
new file mode 100644
index 000000000000..6e0f23091360
--- /dev/null
+++ b/drivers/input/keyboard/nomadik-ske-keypad.c
@@ -0,0 +1,408 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson
+ * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
+ *
+ * License terms:GNU General Public License (GPL) version 2
+ *
+ * Keypad controller driver for the SKE (Scroll Key Encoder) module used in
+ * the Nomadik 8815 and Ux500 platforms.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+
+#include <plat/ske.h>
+
+/* SKE_CR bits */
+#define SKE_KPMLT       (0x1 << 6)
+#define SKE_KPCN        (0x7 << 3)
+#define SKE_KPASEN      (0x1 << 2)
+#define SKE_KPASON      (0x1 << 7)
+
+/* SKE_IMSC bits */
+#define SKE_KPIMA       (0x1 << 2)
+
+/* SKE_ICR bits */
+#define SKE_KPICS       (0x1 << 3)
+#define SKE_KPICA       (0x1 << 2)
+
+/* SKE_RIS bits */
+#define SKE_KPRISA      (0x1 << 2)
+
+#define SKE_KEYPAD_ROW_SHIFT    3
+#define SKE_KPD_KEYMAP_SIZE     (8 * 8)
+
+/* keypad auto scan registers */
+#define SKE_ASR0        0x20
+#define SKE_ASR1        0x24
+#define SKE_ASR2        0x28
+#define SKE_ASR3        0x2C
+
+#define SKE_NUM_ASRX_REGISTERS  (4)
+
+/**
+ * struct ske_keypad  - data structure used by keypad driver
+ * @irq:        irq no
+ * @reg_base:   ske regsiters base address
+ * @input:      pointer to input device object
+ * @board:      keypad platform device
+ * @keymap:     matrix scan code table for keycodes
+ * @clk:        clock structure pointer
+ */
+struct ske_keypad {
+        int irq;
+        void __iomem *reg_base;
+        struct input_dev *input;
+        const struct ske_keypad_platform_data *board;
+        unsigned short keymap[SKE_KPD_KEYMAP_SIZE];
+        struct clk *clk;
+        spinlock_t ske_keypad_lock;
+};
+
+static void ske_keypad_set_bits(struct ske_keypad *keypad, u16 addr,
+                u8 mask, u8 data)
+{
+        u32 ret;
+
+        spin_lock(&keypad->ske_keypad_lock);
+
+        ret = readl(keypad->reg_base + addr);
+        ret &= ~mask;
+        ret |= data;
+        writel(ret, keypad->reg_base + addr);
+
+        spin_unlock(&keypad->ske_keypad_lock);
+}
+
+/*
+ * ske_keypad_chip_init: init keypad controller configuration
+ *
+ * Enable Multi key press detection, auto scan mode
+ */
+static int __devinit ske_keypad_chip_init(struct ske_keypad *keypad)
+{
+        u32 value;
+        int timeout = 50;
+
+        /* check SKE_RIS to be 0 */
+        while ((readl(keypad->reg_base + SKE_RIS) != 0x00000000) && timeout--)
+                cpu_relax();
+
+        if (!timeout)
+                return -EINVAL;
+
+        /*
+         * set debounce value
+         * keypad dbounce is configured in DBCR[15:8]
+         * dbounce value in steps of 32/32.768 ms
+         */
+        spin_lock(&keypad->ske_keypad_lock);
+        value = readl(keypad->reg_base + SKE_DBCR);
+        value = value & 0xff;
+        value |= ((keypad->board->debounce_ms * 32000)/32768) << 8;
+        writel(value, keypad->reg_base + SKE_DBCR);
+        spin_unlock(&keypad->ske_keypad_lock);
+
+        /* enable multi key detection */
+        ske_keypad_set_bits(keypad, SKE_CR, 0x0, SKE_KPMLT);
+
+        /*
+         * set up the number of columns
+         * KPCN[5:3] defines no. of keypad columns to be auto scanned
+         */
+        value = (keypad->board->kcol - 1) << 3;
+        ske_keypad_set_bits(keypad, SKE_CR, SKE_KPCN, value);
+
+        /* clear keypad interrupt for auto(and pending SW) scans */
+        ske_keypad_set_bits(keypad, SKE_ICR, 0x0, SKE_KPICA | SKE_KPICS);
+
+        /* un-mask keypad interrupts */
+        ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA);
+
+        /* enable automatic scan */
+        ske_keypad_set_bits(keypad, SKE_CR, 0x0, SKE_KPASEN);
+
+        return 0;
+}
+
+static void ske_keypad_read_data(struct ske_keypad *keypad)
+{
+        struct input_dev *input = keypad->input;
+        u16 status;
+        int col = 0, row = 0, code;
+        int ske_asr, ske_ris, key_pressed, i;
+
+        /*
+         * Read the auto scan registers
+         *
+         * Each SKE_ASRx (x=0 to x=3) contains two row values.
+         * lower byte contains row value for column 2*x,
+         * upper byte contains row value for column 2*x + 1
+         */
+        for (i = 0; i < SKE_NUM_ASRX_REGISTERS; i++) {
+                ske_asr = readl(keypad->reg_base + SKE_ASR0 + (4 * i));
+                if (!ske_asr)
+                        continue;
+
+                /* now that ASRx is zero, find out the column x and row y*/
+                if (ske_asr & 0xff) {
+                        col = i * 2;
+                        status = ske_asr & 0xff;
+                } else {
+                        col = (i * 2) + 1;
+                        status = (ske_asr & 0xff00) >> 8;
+                }
+
+                /* find out the row */
+                row = __ffs(status);
+
+                code = MATRIX_SCAN_CODE(row, col, SKE_KEYPAD_ROW_SHIFT);
+                ske_ris = readl(keypad->reg_base + SKE_RIS);
+                key_pressed = ske_ris & SKE_KPRISA;
+
+                input_event(input, EV_MSC, MSC_SCAN, code);
+                input_report_key(input, keypad->keymap[code], key_pressed);
+                input_sync(input);
+        }
+}
+
+static irqreturn_t ske_keypad_irq(int irq, void *dev_id)
+{
+        struct ske_keypad *keypad = dev_id;
+        int retries = 20;
+
+        /* disable auto scan interrupt; mask the interrupt generated */
+        ske_keypad_set_bits(keypad, SKE_IMSC, ~SKE_KPIMA, 0x0);
+        ske_keypad_set_bits(keypad, SKE_ICR, 0x0, SKE_KPICA);
+
+        while ((readl(keypad->reg_base + SKE_CR) & SKE_KPASON) && --retries)
+                msleep(5);
+
+        if (retries) {
+                /* SKEx registers are stable and can be read */
+                ske_keypad_read_data(keypad);
+        }
+
+        /* enable auto scan interrupts */
+        ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA);
+
+        return IRQ_HANDLED;
+}
+
+static int __devinit ske_keypad_probe(struct platform_device *pdev)
+{
+        const struct ske_keypad_platform_data *plat = pdev->dev.platform_data;
+        struct ske_keypad *keypad;
+        struct input_dev *input;
+        struct resource *res;
+        int irq;
+        int error;
+
+        if (!plat) {
+                dev_err(&pdev->dev, "invalid keypad platform data\n");
+                return -EINVAL;
+        }
+
+        irq = platform_get_irq(pdev, 0);
+        if (irq < 0) {
+                dev_err(&pdev->dev, "failed to get keypad irq\n");
+                return -EINVAL;
+        }
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                dev_err(&pdev->dev, "missing platform resources\n");
+                return -EINVAL;
+        }
+
+        keypad = kzalloc(sizeof(struct ske_keypad), GFP_KERNEL);
+        input = input_allocate_device();
+        if (!keypad || !input) {
+                dev_err(&pdev->dev, "failed to allocate keypad memory\n");
+                error = -ENOMEM;
+                goto err_free_mem;
+        }
+
+        keypad->irq = irq;
+        keypad->board = plat;
+        keypad->input = input;
+        spin_lock_init(&keypad->ske_keypad_lock);
+
+        if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
+                dev_err(&pdev->dev, "failed to request I/O memory\n");
+                error = -EBUSY;
+                goto err_free_mem;
+        }
+
+        keypad->reg_base = ioremap(res->start, resource_size(res));
+        if (!keypad->reg_base) {
+                dev_err(&pdev->dev, "failed to remap I/O memory\n");
+                error = -ENXIO;
+                goto err_free_mem_region;
+        }
+
+        keypad->clk = clk_get(&pdev->dev, NULL);
+        if (IS_ERR(keypad->clk)) {
+                dev_err(&pdev->dev, "failed to get clk\n");
+                error = PTR_ERR(keypad->clk);
+                goto err_iounmap;
+        }
+
+        input->id.bustype = BUS_HOST;
+        input->name = "ux500-ske-keypad";
+        input->dev.parent = &pdev->dev;
+
+        input->keycode = keypad->keymap;
+        input->keycodesize = sizeof(keypad->keymap[0]);
+        input->keycodemax = ARRAY_SIZE(keypad->keymap);
+
+        input_set_capability(input, EV_MSC, MSC_SCAN);
+
+        __set_bit(EV_KEY, input->evbit);
+        if (!plat->no_autorepeat)
+                __set_bit(EV_REP, input->evbit);
+
+        matrix_keypad_build_keymap(plat->keymap_data, SKE_KEYPAD_ROW_SHIFT,
+                        input->keycode, input->keybit);
+
+        clk_enable(keypad->clk);
+
+        /* go through board initialization helpers */
+        if (keypad->board->init)
+                keypad->board->init();
+
+        error = ske_keypad_chip_init(keypad);
+        if (error) {
+                dev_err(&pdev->dev, "unable to init keypad hardware\n");
+                goto err_clk_disable;
+        }
+
+        error = request_threaded_irq(keypad->irq, NULL, ske_keypad_irq,
+                                     IRQF_ONESHOT, "ske-keypad", keypad);
+        if (error) {
+                dev_err(&pdev->dev, "allocate irq %d failed\n", keypad->irq);
+                goto err_clk_disable;
+        }
+
+        error = input_register_device(input);
+        if (error) {
+                dev_err(&pdev->dev,
+                                "unable to register input device: %d\n", error);
+                goto err_free_irq;
+        }
+
+        if (plat->wakeup_enable)
+                device_init_wakeup(&pdev->dev, true);
+
+        platform_set_drvdata(pdev, keypad);
+
+        return 0;
+
+err_free_irq:
+        free_irq(keypad->irq, keypad);
+err_clk_disable:
+        clk_disable(keypad->clk);
+        clk_put(keypad->clk);
+err_iounmap:
+        iounmap(keypad->reg_base);
+err_free_mem_region:
+        release_mem_region(res->start, resource_size(res));
+err_free_mem:
+        input_free_device(input);
+        kfree(keypad);
+        return error;
+}
+
+static int __devexit ske_keypad_remove(struct platform_device *pdev)
+{
+        struct ske_keypad *keypad = platform_get_drvdata(pdev);
+        struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+        free_irq(keypad->irq, keypad);
+
+        input_unregister_device(keypad->input);
+
+        clk_disable(keypad->clk);
+        clk_put(keypad->clk);
+
+        if (keypad->board->exit)
+                keypad->board->exit();
+
+        iounmap(keypad->reg_base);
+        release_mem_region(res->start, resource_size(res));
+        kfree(keypad);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static int ske_keypad_suspend(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct ske_keypad *keypad = platform_get_drvdata(pdev);
+        int irq = platform_get_irq(pdev, 0);
+
+        if (device_may_wakeup(dev))
+                enable_irq_wake(irq);
+        else
+                ske_keypad_set_bits(keypad, SKE_IMSC, ~SKE_KPIMA, 0x0);
+
+        return 0;
+}
+
+static int ske_keypad_resume(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct ske_keypad *keypad = platform_get_drvdata(pdev);
+        int irq = platform_get_irq(pdev, 0);
+
+        if (device_may_wakeup(dev))
+                disable_irq_wake(irq);
+        else
+                ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA);
+
+        return 0;
+}
+
+static const struct dev_pm_ops ske_keypad_dev_pm_ops = {
+        .suspend = ske_keypad_suspend,
+        .resume = ske_keypad_resume,
+};
+#endif
+
+struct platform_driver ske_keypad_driver = {
+        .driver = {
+                .name = "nmk-ske-keypad",
+                .owner  = THIS_MODULE,
+#ifdef CONFIG_PM
+                .pm = &ske_keypad_dev_pm_ops,
+#endif
+        },
+        .probe = ske_keypad_probe,
+        .remove = __devexit_p(ske_keypad_remove),
+};
+
+static int __init ske_keypad_init(void)
+{
+        return platform_driver_probe(&ske_keypad_driver, ske_keypad_probe);
+}
+module_init(ske_keypad_init);
+
+static void __exit ske_keypad_exit(void)
+{
+        platform_driver_unregister(&ske_keypad_driver);
+}
+module_exit(ske_keypad_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Naveen Kumar <naveen.gaddipati@stericsson.com> / Sundar Iyer <sundar.iyer@stericsson.com>");
+MODULE_DESCRIPTION("Nomadik Scroll-Key-Encoder Keypad Driver");
+MODULE_ALIAS("platform:nomadik-ske-keypad");
diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c
new file mode 100644
index 000000000000..45bd0977d006
--- /dev/null
+++ b/drivers/input/keyboard/omap4-keypad.c
@@ -0,0 +1,318 @@
+/*
+ * OMAP4 Keypad Driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ *
+ * Author: Abraham Arce <x0066660@ti.com>
+ * Initial Code: Syed Rafiuddin <rafiuddin.syed@ti.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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/input.h>
+#include <linux/slab.h>
+
+#include <plat/omap4-keypad.h>
+
+/* OMAP4 registers */
+#define OMAP4_KBD_REVISION              0x00
+#define OMAP4_KBD_SYSCONFIG             0x10
+#define OMAP4_KBD_SYSSTATUS             0x14
+#define OMAP4_KBD_IRQSTATUS             0x18
+#define OMAP4_KBD_IRQENABLE             0x1C
+#define OMAP4_KBD_WAKEUPENABLE          0x20
+#define OMAP4_KBD_PENDING               0x24
+#define OMAP4_KBD_CTRL                  0x28
+#define OMAP4_KBD_DEBOUNCINGTIME        0x2C
+#define OMAP4_KBD_LONGKEYTIME           0x30
+#define OMAP4_KBD_TIMEOUT               0x34
+#define OMAP4_KBD_STATEMACHINE          0x38
+#define OMAP4_KBD_ROWINPUTS             0x3C
+#define OMAP4_KBD_COLUMNOUTPUTS         0x40
+#define OMAP4_KBD_FULLCODE31_0          0x44
+#define OMAP4_KBD_FULLCODE63_32         0x48
+
+/* OMAP4 bit definitions */
+#define OMAP4_DEF_IRQENABLE_EVENTEN     (1 << 0)
+#define OMAP4_DEF_IRQENABLE_LONGKEY     (1 << 1)
+#define OMAP4_DEF_IRQENABLE_TIMEOUTEN   (1 << 2)
+#define OMAP4_DEF_WUP_EVENT_ENA         (1 << 0)
+#define OMAP4_DEF_WUP_LONG_KEY_ENA      (1 << 1)
+#define OMAP4_DEF_CTRL_NOSOFTMODE       (1 << 1)
+#define OMAP4_DEF_CTRLPTVVALUE          (1 << 2)
+#define OMAP4_DEF_CTRLPTV               (1 << 1)
+
+/* OMAP4 values */
+#define OMAP4_VAL_IRQDISABLE            0x00
+#define OMAP4_VAL_DEBOUNCINGTIME        0x07
+#define OMAP4_VAL_FUNCTIONALCFG         0x1E
+
+#define OMAP4_MASK_IRQSTATUSDISABLE     0xFFFF
+
+struct omap4_keypad {
+        struct input_dev *input;
+
+        void __iomem *base;
+        int irq;
+
+        unsigned int rows;
+        unsigned int cols;
+        unsigned int row_shift;
+        unsigned char key_state[8];
+        unsigned short keymap[];
+};
+
+static void __devinit omap4_keypad_config(struct omap4_keypad *keypad_data)
+{
+        __raw_writel(OMAP4_VAL_FUNCTIONALCFG,
+                        keypad_data->base + OMAP4_KBD_CTRL);
+        __raw_writel(OMAP4_VAL_DEBOUNCINGTIME,
+                        keypad_data->base + OMAP4_KBD_DEBOUNCINGTIME);
+        __raw_writel(OMAP4_VAL_IRQDISABLE,
+                        keypad_data->base + OMAP4_KBD_IRQSTATUS);
+        __raw_writel(OMAP4_DEF_IRQENABLE_EVENTEN | OMAP4_DEF_IRQENABLE_LONGKEY,
+                        keypad_data->base + OMAP4_KBD_IRQENABLE);
+        __raw_writel(OMAP4_DEF_WUP_EVENT_ENA | OMAP4_DEF_WUP_LONG_KEY_ENA,
+                        keypad_data->base + OMAP4_KBD_WAKEUPENABLE);
+}
+
+/* Interrupt handler */
+static irqreturn_t omap4_keypad_interrupt(int irq, void *dev_id)
+{
+        struct omap4_keypad *keypad_data = dev_id;
+        struct input_dev *input_dev = keypad_data->input;
+        unsigned char key_state[ARRAY_SIZE(keypad_data->key_state)];
+        unsigned int col, row, code, changed;
+        u32 *new_state = (u32 *) key_state;
+
+        /* Disable interrupts */
+        __raw_writel(OMAP4_VAL_IRQDISABLE,
+                     keypad_data->base + OMAP4_KBD_IRQENABLE);
+
+        *new_state = __raw_readl(keypad_data->base + OMAP4_KBD_FULLCODE31_0);
+        *(new_state + 1) = __raw_readl(keypad_data->base
+                                                + OMAP4_KBD_FULLCODE63_32);
+
+        for (row = 0; row < keypad_data->rows; row++) {
+                changed = key_state[row] ^ keypad_data->key_state[row];
+                if (!changed)
+                        continue;
+
+                for (col = 0; col < keypad_data->cols; col++) {
+                        if (changed & (1 << col)) {
+                                code = MATRIX_SCAN_CODE(row, col,
+                                                keypad_data->row_shift);
+                                input_event(input_dev, EV_MSC, MSC_SCAN, code);
+                                input_report_key(input_dev,
+                                                 keypad_data->keymap[code],
+                                                 key_state[row] & (1 << col));
+                        }
+                }
+        }
+
+        input_sync(input_dev);
+
+        memcpy(keypad_data->key_state, key_state,
+                sizeof(keypad_data->key_state));
+
+        /* clear pending interrupts */
+        __raw_writel(__raw_readl(keypad_data->base + OMAP4_KBD_IRQSTATUS),
+                        keypad_data->base + OMAP4_KBD_IRQSTATUS);
+
+        /* enable interrupts */
+        __raw_writel(OMAP4_DEF_IRQENABLE_EVENTEN | OMAP4_DEF_IRQENABLE_LONGKEY,
+                        keypad_data->base + OMAP4_KBD_IRQENABLE);
+
+        return IRQ_HANDLED;
+}
+
+static int __devinit omap4_keypad_probe(struct platform_device *pdev)
+{
+        const struct omap4_keypad_platform_data *pdata;
+        struct omap4_keypad *keypad_data;
+        struct input_dev *input_dev;
+        struct resource *res;
+        resource_size_t size;
+        unsigned int row_shift, max_keys;
+        int irq;
+        int error;
+
+        /* platform data */
+        pdata = pdev->dev.platform_data;
+        if (!pdata) {
+                dev_err(&pdev->dev, "no platform data defined\n");
+                return -EINVAL;
+        }
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                dev_err(&pdev->dev, "no base address specified\n");
+                return -EINVAL;
+        }
+
+        irq = platform_get_irq(pdev, 0);
+        if (!irq) {
+                dev_err(&pdev->dev, "no keyboard irq assigned\n");
+                return -EINVAL;
+        }
+
+        if (!pdata->keymap_data) {
+                dev_err(&pdev->dev, "no keymap data defined\n");
+                return -EINVAL;
+        }
+
+        row_shift = get_count_order(pdata->cols);
+        max_keys = pdata->rows << row_shift;
+
+        keypad_data = kzalloc(sizeof(struct omap4_keypad) +
+                                max_keys * sizeof(keypad_data->keymap[0]),
+                              GFP_KERNEL);
+        if (!keypad_data) {
+                dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
+                return -ENOMEM;
+        }
+
+        size = resource_size(res);
+
+        res = request_mem_region(res->start, size, pdev->name);
+        if (!res) {
+                dev_err(&pdev->dev, "can't request mem region\n");
+                error = -EBUSY;
+                goto err_free_keypad;
+        }
+
+        keypad_data->base = ioremap(res->start, resource_size(res));
+        if (!keypad_data->base) {
+                dev_err(&pdev->dev, "can't ioremap mem resource\n");
+                error = -ENOMEM;
+                goto err_release_mem;
+        }
+
+        keypad_data->irq = irq;
+        keypad_data->row_shift = row_shift;
+        keypad_data->rows = pdata->rows;
+        keypad_data->cols = pdata->cols;
+
+        /* input device allocation */
+        keypad_data->input = input_dev = input_allocate_device();
+        if (!input_dev) {
+                error = -ENOMEM;
+                goto err_unmap;
+        }
+
+        input_dev->name = pdev->name;
+        input_dev->dev.parent = &pdev->dev;
+        input_dev->id.bustype = BUS_HOST;
+        input_dev->id.vendor = 0x0001;
+        input_dev->id.product = 0x0001;
+        input_dev->id.version = 0x0001;
+
+        input_dev->keycode      = keypad_data->keymap;
+        input_dev->keycodesize  = sizeof(keypad_data->keymap[0]);
+        input_dev->keycodemax   = max_keys;
+
+        __set_bit(EV_KEY, input_dev->evbit);
+        __set_bit(EV_REP, input_dev->evbit);
+
+        input_set_capability(input_dev, EV_MSC, MSC_SCAN);
+
+        input_set_drvdata(input_dev, keypad_data);
+
+        matrix_keypad_build_keymap(pdata->keymap_data, row_shift,
+                        input_dev->keycode, input_dev->keybit);
+
+        omap4_keypad_config(keypad_data);
+
+        error = request_irq(keypad_data->irq, omap4_keypad_interrupt,
+                             IRQF_TRIGGER_RISING,
+                             "omap4-keypad", keypad_data);
+        if (error) {
+                dev_err(&pdev->dev, "failed to register interrupt\n");
+                goto err_free_input;
+        }
+
+        error = input_register_device(keypad_data->input);
+        if (error < 0) {
+                dev_err(&pdev->dev, "failed to register input device\n");
+                goto err_free_irq;
+        }
+
+
+        platform_set_drvdata(pdev, keypad_data);
+        return 0;
+
+err_free_irq:
+        free_irq(keypad_data->irq, keypad_data);
+err_free_input:
+        input_free_device(input_dev);
+err_unmap:
+        iounmap(keypad_data->base);
+err_release_mem:
+        release_mem_region(res->start, size);
+err_free_keypad:
+        kfree(keypad_data);
+        return error;
+}
+
+static int __devexit omap4_keypad_remove(struct platform_device *pdev)
+{
+        struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
+        struct resource *res;
+
+        free_irq(keypad_data->irq, keypad_data);
+        input_unregister_device(keypad_data->input);
+
+        iounmap(keypad_data->base);
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        release_mem_region(res->start, resource_size(res));
+
+        kfree(keypad_data);
+        platform_set_drvdata(pdev, NULL);
+
+        return 0;
+}
+
+static struct platform_driver omap4_keypad_driver = {
+        .probe          = omap4_keypad_probe,
+        .remove         = __devexit_p(omap4_keypad_remove),
+        .driver         = {
+                .name   = "omap4-keypad",
+                .owner  = THIS_MODULE,
+        },
+};
+
+static int __init omap4_keypad_init(void)
+{
+        return platform_driver_register(&omap4_keypad_driver);
+}
+module_init(omap4_keypad_init);
+
+static void __exit omap4_keypad_exit(void)
+{
+        platform_driver_unregister(&omap4_keypad_driver);
+}
+module_exit(omap4_keypad_exit);
+
+MODULE_AUTHOR("Texas Instruments");
+MODULE_DESCRIPTION("OMAP4 Keypad Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:omap4-keypad");
diff --git a/drivers/input/keyboard/twl4030_keypad.c b/drivers/input/keyboard/twl4030_keypad.c
index fb16b5e5ea13..09bef79d9da1 100644
--- a/drivers/input/keyboard/twl4030_keypad.c
+++ b/drivers/input/keyboard/twl4030_keypad.c
@@ -406,23 +406,22 @@ static int __devinit twl4030_kp_probe(struct platform_device *pdev)
         if (error) {
                 dev_info(kp->dbg_dev, "request_irq failed for irq no=%d\n",
                         kp->irq);
-                goto err3;
+                goto err2;
         }
 
         /* Enable KP and TO interrupts now. */
         reg = (u8) ~(KEYP_IMR1_KP | KEYP_IMR1_TO);
         if (twl4030_kpwrite_u8(kp, reg, KEYP_IMR1)) {
                 error = -EIO;
-                goto err4;
+                goto err3;
         }
 
         platform_set_drvdata(pdev, kp);
         return 0;
 
-err4:
+err3:
         /* mask all events - we don't care about the result */
         (void) twl4030_kpwrite_u8(kp, 0xff, KEYP_IMR1);
-err3:
         free_irq(kp->irq, NULL);
 err2:
         input_unregister_device(input);
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index b49e23379723..b99b8cbde02f 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -22,6 +22,16 @@ config INPUT_88PM860X_ONKEY
           To compile this driver as a module, choose M here: the module
           will be called 88pm860x_onkey.
 
+config INPUT_AB8500_PONKEY
+        tristate "AB8500 Pon (PowerOn) Key"
+        depends on AB8500_CORE
+        help
+          Say Y here to use the PowerOn Key for ST-Ericsson's AB8500
+          Mix-Sig PMIC.
+
+          To compile this driver as a module, choose M here: the module
+          will be called ab8500-ponkey.
+
 config INPUT_AD714X
         tristate "Analog Devices AD714x Capacitance Touch Sensor"
         help
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 19ccca78fa76..1fe1f6c8b737 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -5,6 +5,7 @@
 # Each configuration option enables a list of files.
 
 obj-$(CONFIG_INPUT_88PM860X_ONKEY)      += 88pm860x_onkey.o
+obj-$(CONFIG_INPUT_AB8500_PONKEY)       += ab8500-ponkey.o
 obj-$(CONFIG_INPUT_AD714X)              += ad714x.o
 obj-$(CONFIG_INPUT_AD714X_I2C)          += ad714x-i2c.o
 obj-$(CONFIG_INPUT_AD714X_SPI)          += ad714x-spi.o
diff --git a/drivers/input/misc/ab8500-ponkey.c b/drivers/input/misc/ab8500-ponkey.c
new file mode 100644
index 000000000000..3d3288a78fdc
--- /dev/null
+++ b/drivers/input/misc/ab8500-ponkey.c
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License v2
+ * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
+ *
+ * AB8500 Power-On Key handler
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/ab8500.h>
+#include <linux/slab.h>
+
+/**
+ * struct ab8500_ponkey - ab8500 ponkey information
+ * @input_dev: pointer to input device
+ * @ab8500: ab8500 parent
+ * @irq_dbf: irq number for falling transition
+ * @irq_dbr: irq number for rising transition
+ */
+struct ab8500_ponkey {
+        struct input_dev        *idev;
+        struct ab8500           *ab8500;
+        int                     irq_dbf;
+        int                     irq_dbr;
+};
+
+/* AB8500 gives us an interrupt when ONKEY is held */
+static irqreturn_t ab8500_ponkey_handler(int irq, void *data)
+{
+        struct ab8500_ponkey *ponkey = data;
+
+        if (irq == ponkey->irq_dbf)
+                input_report_key(ponkey->idev, KEY_POWER, true);
+        else if (irq == ponkey->irq_dbr)
+                input_report_key(ponkey->idev, KEY_POWER, false);
+
+        input_sync(ponkey->idev);
+
+        return IRQ_HANDLED;
+}
+
+static int __devinit ab8500_ponkey_probe(struct platform_device *pdev)
+{
+        struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
+        struct ab8500_ponkey *ponkey;
+        struct input_dev *input;
+        int irq_dbf, irq_dbr;
+        int error;
+
+        irq_dbf = platform_get_irq_byname(pdev, "ONKEY_DBF");
+        if (irq_dbf < 0) {
+                dev_err(&pdev->dev, "No IRQ for ONKEY_DBF, error=%d\n", irq_dbf);
+                return irq_dbf;
+        }
+
+        irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR");
+        if (irq_dbr < 0) {
+                dev_err(&pdev->dev, "No IRQ for ONKEY_DBR, error=%d\n", irq_dbr);
+                return irq_dbr;
+        }
+
+        ponkey = kzalloc(sizeof(struct ab8500_ponkey), GFP_KERNEL);
+        input = input_allocate_device();
+        if (!ponkey || !input) {
+                error = -ENOMEM;
+                goto err_free_mem;
+        }
+
+        ponkey->idev = input;
+        ponkey->ab8500 = ab8500;
+        ponkey->irq_dbf = irq_dbf;
+        ponkey->irq_dbr = irq_dbr;
+
+        input->name = "AB8500 POn(PowerOn) Key";
+        input->dev.parent = &pdev->dev;
+
+        input_set_capability(input, EV_KEY, KEY_POWER);
+
+        error = request_any_context_irq(ponkey->irq_dbf, ab8500_ponkey_handler,
+                                        0, "ab8500-ponkey-dbf", ponkey);
+        if (error < 0) {
+                dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n",
+                        ponkey->irq_dbf, error);
+                goto err_free_mem;
+        }
+
+        error = request_any_context_irq(ponkey->irq_dbr, ab8500_ponkey_handler,
+                                        0, "ab8500-ponkey-dbr", ponkey);
+        if (error < 0) {
+                dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n",
+                        ponkey->irq_dbr, error);
+                goto err_free_dbf_irq;
+        }
+
+        error = input_register_device(ponkey->idev);
+        if (error) {
+                dev_err(ab8500->dev, "Can't register input device: %d\n", error);
+                goto err_free_dbr_irq;
+        }
+
+        platform_set_drvdata(pdev, ponkey);
+        return 0;
+
+err_free_dbr_irq:
+        free_irq(ponkey->irq_dbr, ponkey);
+err_free_dbf_irq:
+        free_irq(ponkey->irq_dbf, ponkey);
+err_free_mem:
+        input_free_device(input);
+        kfree(ponkey);
+
+        return error;
+}
+
+static int __devexit ab8500_ponkey_remove(struct platform_device *pdev)
+{
+        struct ab8500_ponkey *ponkey = platform_get_drvdata(pdev);
+
+        free_irq(ponkey->irq_dbf, ponkey);
+        free_irq(ponkey->irq_dbr, ponkey);
+        input_unregister_device(ponkey->idev);
+        kfree(ponkey);
+
+        platform_set_drvdata(pdev, NULL);
+
+        return 0;
+}
+
+static struct platform_driver ab8500_ponkey_driver = {
+        .driver         = {
+                .name   = "ab8500-poweron-key",
+                .owner  = THIS_MODULE,
+        },
+        .probe          = ab8500_ponkey_probe,
+        .remove         = __devexit_p(ab8500_ponkey_remove),
+};
+
+static int __init ab8500_ponkey_init(void)
+{
+        return platform_driver_register(&ab8500_ponkey_driver);
+}
+module_init(ab8500_ponkey_init);
+
+static void __exit ab8500_ponkey_exit(void)
+{
+        platform_driver_unregister(&ab8500_ponkey_driver);
+}
+module_exit(ab8500_ponkey_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
+MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver");
diff --git a/drivers/input/misc/ati_remote2.c b/drivers/input/misc/ati_remote2.c
index 23257652b8e8..0b0e9be63542 100644
--- a/drivers/input/misc/ati_remote2.c
+++ b/drivers/input/misc/ati_remote2.c
@@ -483,51 +483,88 @@ static void ati_remote2_complete_key(struct urb *urb)
 }
 
 static int ati_remote2_getkeycode(struct input_dev *idev,
-                                  unsigned int scancode, unsigned int *keycode)
+                                  struct input_keymap_entry *ke)
 {
         struct ati_remote2 *ar2 = input_get_drvdata(idev);
         unsigned int mode;
-        int index;
+        int offset;
+        unsigned int index;
+        unsigned int scancode;
+
+        if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
+                index = ke->index;
+                if (index >= ATI_REMOTE2_MODES *
+                                ARRAY_SIZE(ati_remote2_key_table))
+                        return -EINVAL;
+
+                mode = ke->index / ARRAY_SIZE(ati_remote2_key_table);
+                offset = ke->index % ARRAY_SIZE(ati_remote2_key_table);
+                scancode = (mode << 8) + ati_remote2_key_table[offset].hw_code;
+        } else {
+                if (input_scancode_to_scalar(ke, &scancode))
+                        return -EINVAL;
+
+                mode = scancode >> 8;
+                if (mode > ATI_REMOTE2_PC)
+                        return -EINVAL;
+
+                offset = ati_remote2_lookup(scancode & 0xff);
+                if (offset < 0)
+                        return -EINVAL;
+
+                index = mode * ARRAY_SIZE(ati_remote2_key_table) + offset;
+        }
 
-        mode = scancode >> 8;
-        if (mode > ATI_REMOTE2_PC || !((1 << mode) & ar2->mode_mask))
-                return -EINVAL;
+        ke->keycode = ar2->keycode[mode][offset];
+        ke->len = sizeof(scancode);
+        memcpy(&ke->scancode, &scancode, sizeof(scancode));
+        ke->index = index;
 
-        index = ati_remote2_lookup(scancode & 0xFF);
-        if (index < 0)
-                return -EINVAL;
-
-        *keycode = ar2->keycode[mode][index];
         return 0;
 }
 
 static int ati_remote2_setkeycode(struct input_dev *idev,
-                                  unsigned int scancode, unsigned int keycode)
+                                  const struct input_keymap_entry *ke,
+                                  unsigned int *old_keycode)
 {
         struct ati_remote2 *ar2 = input_get_drvdata(idev);
-        unsigned int mode, old_keycode;
-        int index;
-
-        mode = scancode >> 8;
-        if (mode > ATI_REMOTE2_PC || !((1 << mode) & ar2->mode_mask))
-                return -EINVAL;
-
-        index = ati_remote2_lookup(scancode & 0xFF);
-        if (index < 0)
-                return -EINVAL;
+        unsigned int mode;
+        int offset;
+        unsigned int index;
+        unsigned int scancode;
+
+        if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
+                if (ke->index >= ATI_REMOTE2_MODES *
+                                ARRAY_SIZE(ati_remote2_key_table))
+                        return -EINVAL;
+
+                mode = ke->index / ARRAY_SIZE(ati_remote2_key_table);
+                offset = ke->index % ARRAY_SIZE(ati_remote2_key_table);
+        } else {
+                if (input_scancode_to_scalar(ke, &scancode))
+                        return -EINVAL;
+
+                mode = scancode >> 8;
+                if (mode > ATI_REMOTE2_PC)
+                        return -EINVAL;
+
+                offset = ati_remote2_lookup(scancode & 0xff);
+                if (offset < 0)
+                        return -EINVAL;
+        }
 
-        old_keycode = ar2->keycode[mode][index];
-        ar2->keycode[mode][index] = keycode;
-        __set_bit(keycode, idev->keybit);
+        *old_keycode = ar2->keycode[mode][offset];
+        ar2->keycode[mode][offset] = ke->keycode;
+        __set_bit(ke->keycode, idev->keybit);
 
         for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
                 for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
-                        if (ar2->keycode[mode][index] == old_keycode)
+                        if (ar2->keycode[mode][index] == *old_keycode)
                                 return 0;
                 }
         }
 
-        __clear_bit(old_keycode, idev->keybit);
+        __clear_bit(*old_keycode, idev->keybit);
 
         return 0;
 }
@@ -575,8 +612,8 @@ static int ati_remote2_input_init(struct ati_remote2 *ar2)
         idev->open = ati_remote2_open;
         idev->close = ati_remote2_close;
 
-        idev->getkeycode = ati_remote2_getkeycode;
-        idev->setkeycode = ati_remote2_setkeycode;
+        idev->getkeycode_new = ati_remote2_getkeycode;
+        idev->setkeycode_new = ati_remote2_setkeycode;
 
         idev->name = ar2->name;
         idev->phys = ar2->phys;
diff --git a/drivers/input/misc/powermate.c b/drivers/input/misc/powermate.c
index bf170f6b4422..f45947190e4f 100644
--- a/drivers/input/misc/powermate.c
+++ b/drivers/input/misc/powermate.c
@@ -280,7 +280,7 @@ static int powermate_alloc_buffers(struct usb_device *udev, struct powermate_dev
 
         pm->configcr = kmalloc(sizeof(*(pm->configcr)), GFP_KERNEL);
         if (!pm->configcr)
-                return -1;
+                return -ENOMEM;
 
         return 0;
 }
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 48311204ba51..04d9bf320a4f 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -699,7 +699,7 @@ int elantech_init(struct psmouse *psmouse)
 
         psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
         if (!etd)
-                return -1;
+                return -ENOMEM;
 
         etd->parity[0] = 1;
         for (i = 1; i < 256; i++)
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index 73a7af2542a8..cd9d0c97e429 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -1584,10 +1584,10 @@ static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, co
         if (!new_dev)
                 return -ENOMEM;
 
-        while (serio->child) {
+        while (!list_empty(&serio->children)) {
                 if (++retry > 3) {
                         printk(KERN_WARNING
-                                "psmouse: failed to destroy child port, "
+                                "psmouse: failed to destroy children ports, "
                                 "protocol change aborted.\n");
                         input_free_device(new_dev);
                         return -EIO;
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 96b70a43515f..2e300a460556 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -294,7 +294,29 @@ static int synaptics_pt_write(struct serio *serio, unsigned char c)
         return 0;
 }
 
-static inline int synaptics_is_pt_packet(unsigned char *buf)
+static int synaptics_pt_start(struct serio *serio)
+{
+        struct psmouse *parent = serio_get_drvdata(serio->parent);
+        struct synaptics_data *priv = parent->private;
+
+        serio_pause_rx(parent->ps2dev.serio);
+        priv->pt_port = serio;
+        serio_continue_rx(parent->ps2dev.serio);
+
+        return 0;
+}
+
+static void synaptics_pt_stop(struct serio *serio)
+{
+        struct psmouse *parent = serio_get_drvdata(serio->parent);
+        struct synaptics_data *priv = parent->private;
+
+        serio_pause_rx(parent->ps2dev.serio);
+        priv->pt_port = NULL;
+        serio_continue_rx(parent->ps2dev.serio);
+}
+
+static int synaptics_is_pt_packet(unsigned char *buf)
 {
         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 }
@@ -315,9 +337,8 @@ static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet
 
 static void synaptics_pt_activate(struct psmouse *psmouse)
 {
-        struct serio *ptport = psmouse->ps2dev.serio->child;
-        struct psmouse *child = serio_get_drvdata(ptport);
         struct synaptics_data *priv = psmouse->private;
+        struct psmouse *child = serio_get_drvdata(priv->pt_port);
 
         /* adjust the touchpad to child's choice of protocol */
         if (child) {
@@ -345,6 +366,8 @@ static void synaptics_pt_create(struct psmouse *psmouse)
         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
         serio->write = synaptics_pt_write;
+        serio->start = synaptics_pt_start;
+        serio->stop = synaptics_pt_stop;
         serio->parent = psmouse->ps2dev.serio;
 
         psmouse->pt_activate = synaptics_pt_activate;
@@ -578,9 +601,10 @@ static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
                 if (unlikely(priv->pkt_type == SYN_NEWABS))
                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
 
-                if (SYN_CAP_PASS_THROUGH(priv->capabilities) && synaptics_is_pt_packet(psmouse->packet)) {
-                        if (psmouse->ps2dev.serio->child)
-                                synaptics_pass_pt_packet(psmouse->ps2dev.serio->child, psmouse->packet);
+                if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
+                    synaptics_is_pt_packet(psmouse->packet)) {
+                        if (priv->pt_port)
+                                synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
                 } else
                         synaptics_process_packet(psmouse);
 
@@ -731,7 +755,7 @@ int synaptics_init(struct psmouse *psmouse)
 
         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
         if (!priv)
-                return -1;
+                return -ENOMEM;
 
         psmouse_reset(psmouse);
 
diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h
index b6aa7d20d8a3..613a3652f98f 100644
--- a/drivers/input/mouse/synaptics.h
+++ b/drivers/input/mouse/synaptics.h
@@ -110,6 +110,8 @@ struct synaptics_data {
         unsigned char pkt_type;                 /* packet type - old, new, etc */
         unsigned char mode;                     /* current mode byte */
         int scroll;
+
+        struct serio *pt_port;                  /* Pass-through serio port */
 };
 
 void synaptics_module_init(void);
diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c
index 0643e49ca603..54b2fa892e19 100644
--- a/drivers/input/mouse/trackpoint.c
+++ b/drivers/input/mouse/trackpoint.c
@@ -303,7 +303,7 @@ int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
 
         psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);
         if (!psmouse->private)
-                return -1;
+                return -ENOMEM;
 
         psmouse->vendor = "IBM";
         psmouse->name = "TrackPoint";
diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c
index d528a2dba064..98973340d042 100644
--- a/drivers/input/mousedev.c
+++ b/drivers/input/mousedev.c
@@ -866,7 +866,7 @@ static struct mousedev *mousedev_create(struct input_dev *dev,
         spin_lock_init(&mousedev->client_lock);
         mutex_init(&mousedev->mutex);
         lockdep_set_subclass(&mousedev->mutex,
-                             minor == MOUSEDEV_MIX ? MOUSEDEV_MIX : 0);
+                             minor == MOUSEDEV_MIX ? SINGLE_DEPTH_NESTING : 0);
         init_waitqueue_head(&mousedev->wait);
 
         if (minor == MOUSEDEV_MIX)
diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig
index 3bfe8fafc6ad..6256233d2bfb 100644
--- a/drivers/input/serio/Kconfig
+++ b/drivers/input/serio/Kconfig
@@ -226,4 +226,13 @@ config SERIO_AMS_DELTA
           To compile this driver as a module, choose M here;
           the module will be called ams_delta_serio.
 
+config SERIO_PS2MULT
+        tristate "TQC PS/2 multiplexer"
+        help
+          Say Y here if you have the PS/2 line multiplexer like the one
+          present on TQC boads.
+
+          To compile this driver as a module, choose M here: the
+          module will be called ps2mult.
+
 endif
diff --git a/drivers/input/serio/Makefile b/drivers/input/serio/Makefile
index 84c80bf7185e..dbbe37616c92 100644
--- a/drivers/input/serio/Makefile
+++ b/drivers/input/serio/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_SERIO_GSCPS2)	+= gscps2.o
 obj-$(CONFIG_HP_SDC)            += hp_sdc.o
 obj-$(CONFIG_HIL_MLC)           += hp_sdc_mlc.o hil_mlc.o
 obj-$(CONFIG_SERIO_PCIPS2)      += pcips2.o
+obj-$(CONFIG_SERIO_PS2MULT)     += ps2mult.o
 obj-$(CONFIG_SERIO_MACEPS2)     += maceps2.o
 obj-$(CONFIG_SERIO_LIBPS2)      += libps2.o
 obj-$(CONFIG_SERIO_RAW)         += serio_raw.o
diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index f58513160480..18db5a8c7478 100644
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -1063,7 +1063,7 @@ static long i8042_panic_blink(int state)
 #ifdef CONFIG_X86
 static void i8042_dritek_enable(void)
 {
-        char param = 0x90;
+        unsigned char param = 0x90;
         int error;
 
         error = i8042_command(&param, 0x1059);
diff --git a/drivers/input/serio/ps2mult.c b/drivers/input/serio/ps2mult.c
new file mode 100644
index 000000000000..6bce22e4e495
--- /dev/null
+++ b/drivers/input/serio/ps2mult.c
@@ -0,0 +1,318 @@
+/*
+ * TQC PS/2 Multiplexer driver
+ *
+ * Copyright (C) 2010 Dmitry Eremin-Solenikov
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/serio.h>
+
+MODULE_AUTHOR("Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>");
+MODULE_DESCRIPTION("TQC PS/2 Multiplexer driver");
+MODULE_LICENSE("GPL");
+
+#define PS2MULT_KB_SELECTOR             0xA0
+#define PS2MULT_MS_SELECTOR             0xA1
+#define PS2MULT_ESCAPE                  0x7D
+#define PS2MULT_BSYNC                   0x7E
+#define PS2MULT_SESSION_START           0x55
+#define PS2MULT_SESSION_END             0x56
+
+struct ps2mult_port {
+        struct serio *serio;
+        unsigned char sel;
+        bool registered;
+};
+
+#define PS2MULT_NUM_PORTS       2
+#define PS2MULT_KBD_PORT        0
+#define PS2MULT_MOUSE_PORT      1
+
+struct ps2mult {
+        struct serio *mx_serio;
+        struct ps2mult_port ports[PS2MULT_NUM_PORTS];
+
+        spinlock_t lock;
+        struct ps2mult_port *in_port;
+        struct ps2mult_port *out_port;
+        bool escape;
+};
+
+/* First MUST come PS2MULT_NUM_PORTS selectors */
+static const unsigned char ps2mult_controls[] = {
+        PS2MULT_KB_SELECTOR, PS2MULT_MS_SELECTOR,
+        PS2MULT_ESCAPE, PS2MULT_BSYNC,
+        PS2MULT_SESSION_START, PS2MULT_SESSION_END,
+};
+
+static const struct serio_device_id ps2mult_serio_ids[] = {
+        {
+                .type   = SERIO_RS232,
+                .proto  = SERIO_PS2MULT,
+                .id     = SERIO_ANY,
+                .extra  = SERIO_ANY,
+        },
+        { 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, ps2mult_serio_ids);
+
+static void ps2mult_select_port(struct ps2mult *psm, struct ps2mult_port *port)
+{
+        struct serio *mx_serio = psm->mx_serio;
+
+        serio_write(mx_serio, port->sel);
+        psm->out_port = port;
+        dev_dbg(&mx_serio->dev, "switched to sel %02x\n", port->sel);
+}
+
+static int ps2mult_serio_write(struct serio *serio, unsigned char data)
+{
+        struct serio *mx_port = serio->parent;
+        struct ps2mult *psm = serio_get_drvdata(mx_port);
+        struct ps2mult_port *port = serio->port_data;
+        bool need_escape;
+        unsigned long flags;
+
+        spin_lock_irqsave(&psm->lock, flags);
+
+        if (psm->out_port != port)
+                ps2mult_select_port(psm, port);
+
+        need_escape = memchr(ps2mult_controls, data, sizeof(ps2mult_controls));
+
+        dev_dbg(&serio->dev,
+                "write: %s%02x\n", need_escape ? "ESC " : "", data);
+
+        if (need_escape)
+                serio_write(mx_port, PS2MULT_ESCAPE);
+
+        serio_write(mx_port, data);
+
+        spin_unlock_irqrestore(&psm->lock, flags);
+
+        return 0;
+}
+
+static int ps2mult_serio_start(struct serio *serio)
+{
+        struct ps2mult *psm = serio_get_drvdata(serio->parent);
+        struct ps2mult_port *port = serio->port_data;
+        unsigned long flags;
+
+        spin_lock_irqsave(&psm->lock, flags);
+        port->registered = true;
+        spin_unlock_irqrestore(&psm->lock, flags);
+
+        return 0;
+}
+
+static void ps2mult_serio_stop(struct serio *serio)
+{
+        struct ps2mult *psm = serio_get_drvdata(serio->parent);
+        struct ps2mult_port *port = serio->port_data;
+        unsigned long flags;
+
+        spin_lock_irqsave(&psm->lock, flags);
+        port->registered = false;
+        spin_unlock_irqrestore(&psm->lock, flags);
+}
+
+static int ps2mult_create_port(struct ps2mult *psm, int i)
+{
+        struct serio *mx_serio = psm->mx_serio;
+        struct serio *serio;
+
+        serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
+        if (!serio)
+                return -ENOMEM;
+
+        strlcpy(serio->name, "TQC PS/2 Multiplexer", sizeof(serio->name));
+        snprintf(serio->phys, sizeof(serio->phys),
+                 "%s/port%d", mx_serio->phys, i);
+        serio->id.type = SERIO_8042;
+        serio->write = ps2mult_serio_write;
+        serio->start = ps2mult_serio_start;
+        serio->stop = ps2mult_serio_stop;
+        serio->parent = psm->mx_serio;
+        serio->port_data = &psm->ports[i];
+
+        psm->ports[i].serio = serio;
+
+        return 0;
+}
+
+static void ps2mult_reset(struct ps2mult *psm)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&psm->lock, flags);
+
+        serio_write(psm->mx_serio, PS2MULT_SESSION_END);
+        serio_write(psm->mx_serio, PS2MULT_SESSION_START);
+
+        ps2mult_select_port(psm, &psm->ports[PS2MULT_KBD_PORT]);
+
+        spin_unlock_irqrestore(&psm->lock, flags);
+}
+
+static int ps2mult_connect(struct serio *serio, struct serio_driver *drv)
+{
+        struct ps2mult *psm;
+        int i;
+        int error;
+
+        if (!serio->write)
+                return -EINVAL;
+
+        psm = kzalloc(sizeof(*psm), GFP_KERNEL);
+        if (!psm)
+                return -ENOMEM;
+
+        spin_lock_init(&psm->lock);
+        psm->mx_serio = serio;
+
+        for (i = 0; i < PS2MULT_NUM_PORTS; i++) {
+                psm->ports[i].sel = ps2mult_controls[i];
+                error = ps2mult_create_port(psm, i);
+                if (error)
+                        goto err_out;
+        }
+
+        psm->in_port = psm->out_port = &psm->ports[PS2MULT_KBD_PORT];
+
+        serio_set_drvdata(serio, psm);
+        error = serio_open(serio, drv);
+        if (error)
+                goto err_out;
+
+        ps2mult_reset(psm);
+
+        for (i = 0; i <  PS2MULT_NUM_PORTS; i++) {
+                struct serio *s = psm->ports[i].serio;
+
+                dev_info(&serio->dev, "%s port at %s\n", s->name, serio->phys);
+                serio_register_port(s);
+        }
+
+        return 0;
+
+err_out:
+        while (--i >= 0)
+                kfree(psm->ports[i].serio);
+        kfree(serio);
+        return error;
+}
+
+static void ps2mult_disconnect(struct serio *serio)
+{
+        struct ps2mult *psm = serio_get_drvdata(serio);
+
+        /* Note that serio core already take care of children ports */
+        serio_write(serio, PS2MULT_SESSION_END);
+        serio_close(serio);
+        kfree(psm);
+
+        serio_set_drvdata(serio, NULL);
+}
+
+static int ps2mult_reconnect(struct serio *serio)
+{
+        struct ps2mult *psm = serio_get_drvdata(serio);
+
+        ps2mult_reset(psm);
+
+        return 0;
+}
+
+static irqreturn_t ps2mult_interrupt(struct serio *serio,
+                                     unsigned char data, unsigned int dfl)
+{
+        struct ps2mult *psm = serio_get_drvdata(serio);
+        struct ps2mult_port *in_port;
+        unsigned long flags;
+
+        dev_dbg(&serio->dev, "Received %02x flags %02x\n", data, dfl);
+
+        spin_lock_irqsave(&psm->lock, flags);
+
+        if (psm->escape) {
+                psm->escape = false;
+                in_port = psm->in_port;
+                if (in_port->registered)
+                        serio_interrupt(in_port->serio, data, dfl);
+                goto out;
+        }
+
+        switch (data) {
+        case PS2MULT_ESCAPE:
+                dev_dbg(&serio->dev, "ESCAPE\n");
+                psm->escape = true;
+                break;
+
+        case PS2MULT_BSYNC:
+                dev_dbg(&serio->dev, "BSYNC\n");
+                psm->in_port = psm->out_port;
+                break;
+
+        case PS2MULT_SESSION_START:
+                dev_dbg(&serio->dev, "SS\n");
+                break;
+
+        case PS2MULT_SESSION_END:
+                dev_dbg(&serio->dev, "SE\n");
+                break;
+
+        case PS2MULT_KB_SELECTOR:
+                dev_dbg(&serio->dev, "KB\n");
+                psm->in_port = &psm->ports[PS2MULT_KBD_PORT];
+                break;
+
+        case PS2MULT_MS_SELECTOR:
+                dev_dbg(&serio->dev, "MS\n");
+                psm->in_port = &psm->ports[PS2MULT_MOUSE_PORT];
+                break;
+
+        default:
+                in_port = psm->in_port;
+                if (in_port->registered)
+                        serio_interrupt(in_port->serio, data, dfl);
+                break;
+        }
+
+ out:
+        spin_unlock_irqrestore(&psm->lock, flags);
+        return IRQ_HANDLED;
+}
+
+static struct serio_driver ps2mult_drv = {
+        .driver         = {
+                .name   = "ps2mult",
+        },
+        .description    = "TQC PS/2 Multiplexer driver",
+        .id_table       = ps2mult_serio_ids,
+        .interrupt      = ps2mult_interrupt,
+        .connect        = ps2mult_connect,
+        .disconnect     = ps2mult_disconnect,
+        .reconnect      = ps2mult_reconnect,
+};
+
+static int __init ps2mult_init(void)
+{
+        return serio_register_driver(&ps2mult_drv);
+}
+
+static void __exit ps2mult_exit(void)
+{
+        serio_unregister_driver(&ps2mult_drv);
+}
+
+module_init(ps2mult_init);
+module_exit(ps2mult_exit);
diff --git a/drivers/input/serio/serio.c b/drivers/input/serio/serio.c
index c3b626e9eae7..405bf214527c 100644
--- a/drivers/input/serio/serio.c
+++ b/drivers/input/serio/serio.c
@@ -37,7 +37,6 @@
 #include <linux/slab.h>
 #include <linux/kthread.h>
 #include <linux/mutex.h>
-#include <linux/freezer.h>
 
 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 MODULE_DESCRIPTION("Serio abstraction core");
@@ -56,7 +55,7 @@ static struct bus_type serio_bus;
 static void serio_add_port(struct serio *serio);
 static int serio_reconnect_port(struct serio *serio);
 static void serio_disconnect_port(struct serio *serio);
-static void serio_reconnect_chain(struct serio *serio);
+static void serio_reconnect_subtree(struct serio *serio);
 static void serio_attach_driver(struct serio_driver *drv);
 
 static int serio_connect_driver(struct serio *serio, struct serio_driver *drv)
@@ -152,7 +151,7 @@ static void serio_find_driver(struct serio *serio)
 enum serio_event_type {
         SERIO_RESCAN_PORT,
         SERIO_RECONNECT_PORT,
-        SERIO_RECONNECT_CHAIN,
+        SERIO_RECONNECT_SUBTREE,
         SERIO_REGISTER_PORT,
         SERIO_ATTACH_DRIVER,
 };
@@ -292,8 +291,8 @@ static void serio_handle_event(void)
                         serio_find_driver(event->object);
                         break;
 
-                case SERIO_RECONNECT_CHAIN:
-                        serio_reconnect_chain(event->object);
+                case SERIO_RECONNECT_SUBTREE:
+                        serio_reconnect_subtree(event->object);
                         break;
 
                 case SERIO_ATTACH_DRIVER:
@@ -330,12 +329,10 @@ static void serio_remove_pending_events(void *object)
 }
 
 /*
- * Destroy child serio port (if any) that has not been fully registered yet.
+ * Locate child serio port (if any) that has not been fully registered yet.
  *
- * Note that we rely on the fact that port can have only one child and therefore
- * only one child registration request can be pending. Additionally, children
- * are registered by driver's connect() handler so there can't be a grandchild
- * pending registration together with a child.
+ * Children are registered by driver's connect() handler so there can't be a
+ * grandchild pending registration together with a child.
  */
 static struct serio *serio_get_pending_child(struct serio *parent)
 {
@@ -449,7 +446,7 @@ static ssize_t serio_rebind_driver(struct device *dev, struct device_attribute *
         if (!strncmp(buf, "none", count)) {
                 serio_disconnect_port(serio);
         } else if (!strncmp(buf, "reconnect", count)) {
-                serio_reconnect_chain(serio);
+                serio_reconnect_subtree(serio);
         } else if (!strncmp(buf, "rescan", count)) {
                 serio_disconnect_port(serio);
                 serio_find_driver(serio);
@@ -516,6 +513,8 @@ static void serio_init_port(struct serio *serio)
         __module_get(THIS_MODULE);
 
         INIT_LIST_HEAD(&serio->node);
+        INIT_LIST_HEAD(&serio->child_node);
+        INIT_LIST_HEAD(&serio->children);
         spin_lock_init(&serio->lock);
         mutex_init(&serio->drv_mutex);
         device_initialize(&serio->dev);
@@ -538,12 +537,13 @@ static void serio_init_port(struct serio *serio)
  */
 static void serio_add_port(struct serio *serio)
 {
+        struct serio *parent = serio->parent;
         int error;
 
-        if (serio->parent) {
-                serio_pause_rx(serio->parent);
-                serio->parent->child = serio;
-                serio_continue_rx(serio->parent);
+        if (parent) {
+                serio_pause_rx(parent);
+                list_add_tail(&serio->child_node, &parent->children);
+                serio_continue_rx(parent);
         }
 
         list_add_tail(&serio->node, &serio_list);
@@ -559,15 +559,14 @@ static void serio_add_port(struct serio *serio)
 }
 
 /*
- * serio_destroy_port() completes deregistration process and removes
+ * serio_destroy_port() completes unregistration process and removes
  * port from the system
  */
 static void serio_destroy_port(struct serio *serio)
 {
         struct serio *child;
 
-        child = serio_get_pending_child(serio);
-        if (child) {
+        while ((child = serio_get_pending_child(serio)) != NULL) {
                 serio_remove_pending_events(child);
                 put_device(&child->dev);
         }
@@ -577,7 +576,7 @@ static void serio_destroy_port(struct serio *serio)
 
         if (serio->parent) {
                 serio_pause_rx(serio->parent);
-                serio->parent->child = NULL;
+                list_del_init(&serio->child_node);
                 serio_continue_rx(serio->parent);
                 serio->parent = NULL;
         }
@@ -609,46 +608,82 @@ static int serio_reconnect_port(struct serio *serio)
 }
 
 /*
- * Reconnect serio port and all its children (re-initialize attached devices)
+ * Reconnect serio port and all its children (re-initialize attached
+ * devices).
  */
-static void serio_reconnect_chain(struct serio *serio)
+static void serio_reconnect_subtree(struct serio *root)
 {
+        struct serio *s = root;
+        int error;
+
         do {
-                if (serio_reconnect_port(serio)) {
-                        /* Ok, old children are now gone, we are done */
-                        break;
+                error = serio_reconnect_port(s);
+                if (!error) {
+                        /*
+                         * Reconnect was successful, move on to do the
+                         * first child.
+                         */
+                        if (!list_empty(&s->children)) {
+                                s = list_first_entry(&s->children,
+                                                     struct serio, child_node);
+                                continue;
+                        }
                 }
-                serio = serio->child;
-        } while (serio);
+
+                /*
+                 * Either it was a leaf node or reconnect failed and it
+                 * became a leaf node. Continue reconnecting starting with
+                 * the next sibling of the parent node.
+                 */
+                while (s != root) {
+                        struct serio *parent = s->parent;
+
+                        if (!list_is_last(&s->child_node, &parent->children)) {
+                                s = list_entry(s->child_node.next,
+                                               struct serio, child_node);
+                                break;
+                        }
+
+                        s = parent;
+                }
+        } while (s != root);
 }
 
 /*
  * serio_disconnect_port() unbinds a port from its driver. As a side effect
- * all child ports are unbound and destroyed.
+ * all children ports are unbound and destroyed.
  */
 static void serio_disconnect_port(struct serio *serio)
 {
-        struct serio *s, *parent;
+        struct serio *s = serio;
+
+        /*
+         * Children ports should be disconnected and destroyed
+         * first; we travel the tree in depth-first order.
+         */
+        while (!list_empty(&serio->children)) {
+
+                /* Locate a leaf */
+                while (!list_empty(&s->children))
+                        s = list_first_entry(&s->children,
+                                             struct serio, child_node);
 
-        if (serio->child) {
                 /*
-                 * Children ports should be disconnected and destroyed
-                 * first, staring with the leaf one, since we don't want
-                 * to do recursion
+                 * Prune this leaf node unless it is the one we
+                 * started with.
                  */
-                for (s = serio; s->child; s = s->child)
-                        /* empty */;
-
-                do {
-                        parent = s->parent;
+                if (s != serio) {
+                        struct serio *parent = s->parent;
 
                         device_release_driver(&s->dev);
                         serio_destroy_port(s);
-                } while ((s = parent) != serio);
+
+                        s = parent;
+                }
         }
 
         /*
-         * Ok, no children left, now disconnect this port
+         * OK, no children left, now disconnect this port.
          */
         device_release_driver(&serio->dev);
 }
@@ -661,7 +696,7 @@ EXPORT_SYMBOL(serio_rescan);
 
 void serio_reconnect(struct serio *serio)
 {
-        serio_queue_event(serio, NULL, SERIO_RECONNECT_CHAIN);
+        serio_queue_event(serio, NULL, SERIO_RECONNECT_SUBTREE);
 }
 EXPORT_SYMBOL(serio_reconnect);
 
@@ -689,14 +724,16 @@ void serio_unregister_port(struct serio *serio)
 EXPORT_SYMBOL(serio_unregister_port);
 
 /*
- * Safely unregisters child port if one is present.
+ * Safely unregisters children ports if they are present.
  */
 void serio_unregister_child_port(struct serio *serio)
 {
+        struct serio *s, *next;
+
         mutex_lock(&serio_mutex);
-        if (serio->child) {
-                serio_disconnect_port(serio->child);
-                serio_destroy_port(serio->child);
+        list_for_each_entry_safe(s, next, &serio->children, child_node) {
+                serio_disconnect_port(s);
+                serio_destroy_port(s);
         }
         mutex_unlock(&serio_mutex);
 }
diff --git a/drivers/input/sparse-keymap.c b/drivers/input/sparse-keymap.c
index 014248344763..a29a7812bd46 100644
--- a/drivers/input/sparse-keymap.c
+++ b/drivers/input/sparse-keymap.c
@@ -22,6 +22,37 @@ MODULE_DESCRIPTION("Generic support for sparse keymaps");
 MODULE_LICENSE("GPL v2");
 MODULE_VERSION("0.1");
 
+static unsigned int sparse_keymap_get_key_index(struct input_dev *dev,
+                                                const struct key_entry *k)
+{
+        struct key_entry *key;
+        unsigned int idx = 0;
+
+        for (key = dev->keycode; key->type != KE_END; key++) {
+                if (key->type == KE_KEY) {
+                        if (key == k)
+                                break;
+                        idx++;
+                }
+        }
+
+        return idx;
+}
+
+static struct key_entry *sparse_keymap_entry_by_index(struct input_dev *dev,
+                                                      unsigned int index)
+{
+        struct key_entry *key;
+        unsigned int key_cnt = 0;
+
+        for (key = dev->keycode; key->type != KE_END; key++)
+                if (key->type == KE_KEY)
+                        if (key_cnt++ == index)
+                                return key;
+
+        return NULL;
+}
+
 /**
  * sparse_keymap_entry_from_scancode - perform sparse keymap lookup
  * @dev: Input device using sparse keymap
@@ -64,16 +95,36 @@ struct key_entry *sparse_keymap_entry_from_keycode(struct input_dev *dev,
 }
 EXPORT_SYMBOL(sparse_keymap_entry_from_keycode);
 
+static struct key_entry *sparse_keymap_locate(struct input_dev *dev,
+                                        const struct input_keymap_entry *ke)
+{
+        struct key_entry *key;
+        unsigned int scancode;
+
+        if (ke->flags & INPUT_KEYMAP_BY_INDEX)
+                key = sparse_keymap_entry_by_index(dev, ke->index);
+        else if (input_scancode_to_scalar(ke, &scancode) == 0)
+                key = sparse_keymap_entry_from_scancode(dev, scancode);
+        else
+                key = NULL;
+
+        return key;
+}
+
 static int sparse_keymap_getkeycode(struct input_dev *dev,
-                                    unsigned int scancode,
-                                    unsigned int *keycode)
+                                    struct input_keymap_entry *ke)
 {
         const struct key_entry *key;
 
         if (dev->keycode) {
-                key = sparse_keymap_entry_from_scancode(dev, scancode);
+                key = sparse_keymap_locate(dev, ke);
                 if (key && key->type == KE_KEY) {
-                        *keycode = key->keycode;
+                        ke->keycode = key->keycode;
+                        if (!(ke->flags & INPUT_KEYMAP_BY_INDEX))
+                                ke->index =
+                                        sparse_keymap_get_key_index(dev, key);
+                        ke->len = sizeof(key->code);
+                        memcpy(ke->scancode, &key->code, sizeof(key->code));
                         return 0;
                 }
         }
@@ -82,20 +133,19 @@ static int sparse_keymap_getkeycode(struct input_dev *dev,
 }
 
 static int sparse_keymap_setkeycode(struct input_dev *dev,
-                                    unsigned int scancode,
-                                    unsigned int keycode)
+                                    const struct input_keymap_entry *ke,
+                                    unsigned int *old_keycode)
 {
         struct key_entry *key;
-        int old_keycode;
 
         if (dev->keycode) {
-                key = sparse_keymap_entry_from_scancode(dev, scancode);
+                key = sparse_keymap_locate(dev, ke);
                 if (key && key->type == KE_KEY) {
-                        old_keycode = key->keycode;
-                        key->keycode = keycode;
-                        set_bit(keycode, dev->keybit);
-                        if (!sparse_keymap_entry_from_keycode(dev, old_keycode))
-                                clear_bit(old_keycode, dev->keybit);
+                        *old_keycode = key->keycode;
+                        key->keycode = ke->keycode;
+                        set_bit(ke->keycode, dev->keybit);
+                        if (!sparse_keymap_entry_from_keycode(dev, *old_keycode))
+                                clear_bit(*old_keycode, dev->keybit);
                         return 0;
                 }
         }
@@ -159,15 +209,14 @@ int sparse_keymap_setup(struct input_dev *dev,
 
         dev->keycode = map;
         dev->keycodemax = map_size;
-        dev->getkeycode = sparse_keymap_getkeycode;
-        dev->setkeycode = sparse_keymap_setkeycode;
+        dev->getkeycode_new = sparse_keymap_getkeycode;
+        dev->setkeycode_new = sparse_keymap_setkeycode;
 
         return 0;
 
  err_out:
         kfree(map);
         return error;
-
 }
 EXPORT_SYMBOL(sparse_keymap_setup);
 
diff --git a/drivers/input/tablet/Kconfig b/drivers/input/tablet/Kconfig
index effb49ea24aa..58a87755b936 100644
--- a/drivers/input/tablet/Kconfig
+++ b/drivers/input/tablet/Kconfig
@@ -49,6 +49,17 @@ config TABLET_USB_GTCO
           To compile this driver as a module, choose M here: the
           module will be called gtco.
 
+config TABLET_USB_HANWANG
+        tristate "Hanwang Art Master III tablet support (USB)"
+        depends on USB_ARCH_HAS_HCD
+        select USB
+        help
+          Say Y here if you want to use the USB version of the Hanwang Art
+          Master III tablet.
+
+          To compile this driver as a module, choose M here: the
+          module will be called hanwang.
+
 config TABLET_USB_KBTAB
         tristate "KB Gear JamStudio tablet support (USB)"
         depends on USB_ARCH_HAS_HCD
diff --git a/drivers/input/tablet/Makefile b/drivers/input/tablet/Makefile
index ce8b9a9cfa40..3f6c25220638 100644
--- a/drivers/input/tablet/Makefile
+++ b/drivers/input/tablet/Makefile
@@ -8,5 +8,6 @@ wacom-objs	:= wacom_wac.o wacom_sys.o
 obj-$(CONFIG_TABLET_USB_ACECAD) += acecad.o
 obj-$(CONFIG_TABLET_USB_AIPTEK) += aiptek.o
 obj-$(CONFIG_TABLET_USB_GTCO)   += gtco.o
+obj-$(CONFIG_TABLET_USB_HANWANG) += hanwang.o
 obj-$(CONFIG_TABLET_USB_KBTAB)  += kbtab.o
 obj-$(CONFIG_TABLET_USB_WACOM)  += wacom.o
diff --git a/drivers/input/tablet/hanwang.c b/drivers/input/tablet/hanwang.c
new file mode 100644
index 000000000000..6504b627b234
--- /dev/null
+++ b/drivers/input/tablet/hanwang.c
@@ -0,0 +1,446 @@
+/*
+ *  USB Hanwang tablet support
+ *
+ *  Copyright (c) 2010 Xing Wei <weixing@hanwang.com.cn>
+ *
+ */
+
+/*
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/usb/input.h>
+
+#define DRIVER_AUTHOR   "Xing Wei <weixing@hanwang.com.cn>"
+#define DRIVER_DESC     "USB Hanwang tablet driver"
+#define DRIVER_LICENSE  "GPL"
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE(DRIVER_LICENSE);
+
+#define USB_VENDOR_ID_HANWANG           0x0b57
+#define HANWANG_TABLET_INT_CLASS        0x0003
+#define HANWANG_TABLET_INT_SUB_CLASS    0x0001
+#define HANWANG_TABLET_INT_PROTOCOL     0x0002
+
+#define ART_MASTER_PKGLEN_MAX   10
+
+/* device IDs */
+#define STYLUS_DEVICE_ID        0x02
+#define TOUCH_DEVICE_ID         0x03
+#define CURSOR_DEVICE_ID        0x06
+#define ERASER_DEVICE_ID        0x0A
+#define PAD_DEVICE_ID           0x0F
+
+/* match vendor and interface info  */
+#define HANWANG_TABLET_DEVICE(vend, cl, sc, pr) \
+        .match_flags = USB_DEVICE_ID_MATCH_VENDOR \
+                | USB_DEVICE_ID_MATCH_INT_INFO, \
+        .idVendor = (vend), \
+        .bInterfaceClass = (cl), \
+        .bInterfaceSubClass = (sc), \
+        .bInterfaceProtocol = (pr)
+
+enum hanwang_tablet_type {
+        HANWANG_ART_MASTER_III,
+        HANWANG_ART_MASTER_HD,
+};
+
+struct hanwang {
+        unsigned char *data;
+        dma_addr_t data_dma;
+        struct input_dev *dev;
+        struct usb_device *usbdev;
+        struct urb *irq;
+        const struct hanwang_features *features;
+        unsigned int current_tool;
+        unsigned int current_id;
+        char name[64];
+        char phys[32];
+};
+
+struct hanwang_features {
+        unsigned short pid;
+        char *name;
+        enum hanwang_tablet_type type;
+        int pkg_len;
+        int max_x;
+        int max_y;
+        int max_tilt_x;
+        int max_tilt_y;
+        int max_pressure;
+};
+
+static const struct hanwang_features features_array[] = {
+        { 0x8528, "Hanwang Art Master III 0906", HANWANG_ART_MASTER_III,
+          ART_MASTER_PKGLEN_MAX, 0x5757, 0x3692, 0x3f, 0x7f, 2048 },
+        { 0x8529, "Hanwang Art Master III 0604", HANWANG_ART_MASTER_III,
+          ART_MASTER_PKGLEN_MAX, 0x3d84, 0x2672, 0x3f, 0x7f, 2048 },
+        { 0x852a, "Hanwang Art Master III 1308", HANWANG_ART_MASTER_III,
+          ART_MASTER_PKGLEN_MAX, 0x7f00, 0x4f60, 0x3f, 0x7f, 2048 },
+        { 0x8401, "Hanwang Art Master HD 5012", HANWANG_ART_MASTER_HD,
+          ART_MASTER_PKGLEN_MAX, 0x678e, 0x4150, 0x3f, 0x7f, 1024 },
+};
+
+static const int hw_eventtypes[] = {
+        EV_KEY, EV_ABS, EV_MSC,
+};
+
+static const int hw_absevents[] = {
+        ABS_X, ABS_Y, ABS_TILT_X, ABS_TILT_Y, ABS_WHEEL,
+        ABS_RX, ABS_RY, ABS_PRESSURE, ABS_MISC,
+};
+
+static const int hw_btnevents[] = {
+        BTN_STYLUS, BTN_STYLUS2, BTN_TOOL_PEN, BTN_TOOL_RUBBER,
+        BTN_TOOL_MOUSE, BTN_TOOL_FINGER,
+        BTN_0, BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8,
+};
+
+static const int hw_mscevents[] = {
+        MSC_SERIAL,
+};
+
+static void hanwang_parse_packet(struct hanwang *hanwang)
+{
+        unsigned char *data = hanwang->data;
+        struct input_dev *input_dev = hanwang->dev;
+        struct usb_device *dev = hanwang->usbdev;
+        enum hanwang_tablet_type type = hanwang->features->type;
+        int i;
+        u16 x, y, p;
+
+        switch (data[0]) {
+        case 0x02:      /* data packet */
+                switch (data[1]) {
+                case 0x80:      /* tool prox out */
+                        hanwang->current_id = 0;
+                        input_report_key(input_dev, hanwang->current_tool, 0);
+                        break;
+
+                case 0xc2:      /* first time tool prox in */
+                        switch (data[3] & 0xf0) {
+                        case 0x20:      /* art_master III */
+                        case 0x30:      /* art_master_HD */
+                                hanwang->current_id = STYLUS_DEVICE_ID;
+                                hanwang->current_tool = BTN_TOOL_PEN;
+                                input_report_key(input_dev, BTN_TOOL_PEN, 1);
+                                break;
+                        case 0xa0:      /* art_master III */
+                        case 0xb0:      /* art_master_HD */
+                                hanwang->current_id = ERASER_DEVICE_ID;
+                                hanwang->current_tool = BTN_TOOL_RUBBER;
+                                input_report_key(input_dev, BTN_TOOL_RUBBER, 1);
+                                break;
+                        default:
+                                hanwang->current_id = 0;
+                                dev_dbg(&dev->dev,
+                                        "unknown tablet tool %02x ", data[0]);
+                                break;
+                        }
+                        break;
+
+                default:        /* tool data packet */
+                        x = (data[2] << 8) | data[3];
+                        y = (data[4] << 8) | data[5];
+
+                        switch (type) {
+                        case HANWANG_ART_MASTER_III:
+                                p = (data[6] << 3) |
+                                    ((data[7] & 0xc0) >> 5) |
+                                    (data[1] & 0x01);
+                                break;
+
+                        case HANWANG_ART_MASTER_HD:
+                                p = (data[7] >> 6) | (data[6] << 2);
+                                break;
+
+                        default:
+                                p = 0;
+                                break;
+                        }
+
+                        input_report_abs(input_dev, ABS_X,
+                                                le16_to_cpup((__le16 *)&x));
+                        input_report_abs(input_dev, ABS_Y,
+                                                le16_to_cpup((__le16 *)&y));
+                        input_report_abs(input_dev, ABS_PRESSURE,
+                                                le16_to_cpup((__le16 *)&p));
+                        input_report_abs(input_dev, ABS_TILT_X, data[7] & 0x3f);
+                        input_report_abs(input_dev, ABS_TILT_Y, data[8] & 0x7f);
+                        input_report_key(input_dev, BTN_STYLUS, data[1] & 0x02);
+                        input_report_key(input_dev, BTN_STYLUS2, data[1] & 0x04);
+                        break;
+                }
+                input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
+                input_event(input_dev, EV_MSC, MSC_SERIAL,
+                                hanwang->features->pid);
+                break;
+
+        case 0x0c:
+                /* roll wheel */
+                hanwang->current_id = PAD_DEVICE_ID;
+
+                switch (type) {
+                case HANWANG_ART_MASTER_III:
+                        input_report_key(input_dev, BTN_TOOL_FINGER, data[1] ||
+                                                        data[2] || data[3]);
+                        input_report_abs(input_dev, ABS_WHEEL, data[1]);
+                        input_report_key(input_dev, BTN_0, data[2]);
+                        for (i = 0; i < 8; i++)
+                                input_report_key(input_dev,
+                                         BTN_1 + i, data[3] & (1 << i));
+                        break;
+
+                case HANWANG_ART_MASTER_HD:
+                        input_report_key(input_dev, BTN_TOOL_FINGER, data[1] ||
+                                        data[2] || data[3] || data[4] ||
+                                        data[5] || data[6]);
+                        input_report_abs(input_dev, ABS_RX,
+                                        ((data[1] & 0x1f) << 8) | data[2]);
+                        input_report_abs(input_dev, ABS_RY,
+                                        ((data[3] & 0x1f) << 8) | data[4]);
+                        input_report_key(input_dev, BTN_0, data[5] & 0x01);
+                        for (i = 0; i < 4; i++) {
+                                input_report_key(input_dev,
+                                         BTN_1 + i, data[5] & (1 << i));
+                                input_report_key(input_dev,
+                                         BTN_5 + i, data[6] & (1 << i));
+                        }
+                        break;
+                }
+
+                input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
+                input_event(input_dev, EV_MSC, MSC_SERIAL, 0xffffffff);
+                break;
+
+        default:
+                dev_dbg(&dev->dev, "error packet  %02x ", data[0]);
+                break;
+        }
+
+        input_sync(input_dev);
+}
+
+static void hanwang_irq(struct urb *urb)
+{
+        struct hanwang *hanwang = urb->context;
+        struct usb_device *dev = hanwang->usbdev;
+        int retval;
+
+        switch (urb->status) {
+        case 0:
+                /* success */;
+                hanwang_parse_packet(hanwang);
+                break;
+        case -ECONNRESET:
+        case -ENOENT:
+        case -ESHUTDOWN:
+                /* this urb is terminated, clean up */
+                dev_err(&dev->dev, "%s - urb shutting down with status: %d",
+                        __func__, urb->status);
+                return;
+        default:
+                dev_err(&dev->dev, "%s - nonzero urb status received: %d",
+                        __func__, urb->status);
+                break;
+        }
+
+        retval = usb_submit_urb(urb, GFP_ATOMIC);
+        if (retval)
+                dev_err(&dev->dev, "%s - usb_submit_urb failed with result %d",
+                        __func__, retval);
+}
+
+static int hanwang_open(struct input_dev *dev)
+{
+        struct hanwang *hanwang = input_get_drvdata(dev);
+
+        hanwang->irq->dev = hanwang->usbdev;
+        if (usb_submit_urb(hanwang->irq, GFP_KERNEL))
+                return -EIO;
+
+        return 0;
+}
+
+static void hanwang_close(struct input_dev *dev)
+{
+        struct hanwang *hanwang = input_get_drvdata(dev);
+
+        usb_kill_urb(hanwang->irq);
+}
+
+static bool get_features(struct usb_device *dev, struct hanwang *hanwang)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(features_array); i++) {
+                if (le16_to_cpu(dev->descriptor.idProduct) ==
+                                features_array[i].pid) {
+                        hanwang->features = &features_array[i];
+                        return true;
+                }
+        }
+
+        return false;
+}
+
+
+static int hanwang_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+        struct usb_device *dev = interface_to_usbdev(intf);
+        struct usb_endpoint_descriptor *endpoint;
+        struct hanwang *hanwang;
+        struct input_dev *input_dev;
+        int error;
+        int i;
+
+        hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL);
+        input_dev = input_allocate_device();
+        if (!hanwang || !input_dev) {
+                error = -ENOMEM;
+                goto fail1;
+        }
+
+        if (!get_features(dev, hanwang)) {
+                error = -ENXIO;
+                goto fail1;
+        }
+
+        hanwang->data = usb_alloc_coherent(dev, hanwang->features->pkg_len,
+                                        GFP_KERNEL, &hanwang->data_dma);
+        if (!hanwang->data) {
+                error = -ENOMEM;
+                goto fail1;
+        }
+
+        hanwang->irq = usb_alloc_urb(0, GFP_KERNEL);
+        if (!hanwang->irq) {
+                error = -ENOMEM;
+                goto fail2;
+        }
+
+        hanwang->usbdev = dev;
+        hanwang->dev = input_dev;
+
+        usb_make_path(dev, hanwang->phys, sizeof(hanwang->phys));
+        strlcat(hanwang->phys, "/input0", sizeof(hanwang->phys));
+
+        strlcpy(hanwang->name, hanwang->features->name, sizeof(hanwang->name));
+        input_dev->name = hanwang->name;
+        input_dev->phys = hanwang->phys;
+        usb_to_input_id(dev, &input_dev->id);
+        input_dev->dev.parent = &intf->dev;
+
+        input_set_drvdata(input_dev, hanwang);
+
+        input_dev->open = hanwang_open;
+        input_dev->close = hanwang_close;
+
+        for (i = 0; i < ARRAY_SIZE(hw_eventtypes); ++i)
+                __set_bit(hw_eventtypes[i], input_dev->evbit);
+
+        for (i = 0; i < ARRAY_SIZE(hw_absevents); ++i)
+                __set_bit(hw_absevents[i], input_dev->absbit);
+
+        for (i = 0; i < ARRAY_SIZE(hw_btnevents); ++i)
+                __set_bit(hw_btnevents[i], input_dev->keybit);
+
+        for (i = 0; i < ARRAY_SIZE(hw_mscevents); ++i)
+                __set_bit(hw_mscevents[i], input_dev->mscbit);
+
+        input_set_abs_params(input_dev, ABS_X,
+                             0, hanwang->features->max_x, 4, 0);
+        input_set_abs_params(input_dev, ABS_Y,
+                             0, hanwang->features->max_y, 4, 0);
+        input_set_abs_params(input_dev, ABS_TILT_X,
+                             0, hanwang->features->max_tilt_x, 0, 0);
+        input_set_abs_params(input_dev, ABS_TILT_Y,
+                             0, hanwang->features->max_tilt_y, 0, 0);
+        input_set_abs_params(input_dev, ABS_PRESSURE,
+                             0, hanwang->features->max_pressure, 0, 0);
+
+        endpoint = &intf->cur_altsetting->endpoint[0].desc;
+        usb_fill_int_urb(hanwang->irq, dev,
+                        usb_rcvintpipe(dev, endpoint->bEndpointAddress),
+                        hanwang->data, hanwang->features->pkg_len,
+                        hanwang_irq, hanwang, endpoint->bInterval);
+        hanwang->irq->transfer_dma = hanwang->data_dma;
+        hanwang->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+        error = input_register_device(hanwang->dev);
+        if (error)
+                goto fail3;
+
+        usb_set_intfdata(intf, hanwang);
+
+        return 0;
+
+ fail3: usb_free_urb(hanwang->irq);
+ fail2: usb_free_coherent(dev, hanwang->features->pkg_len,
+                        hanwang->data, hanwang->data_dma);
+ fail1: input_free_device(input_dev);
+        kfree(hanwang);
+        return error;
+
+}
+
+static void hanwang_disconnect(struct usb_interface *intf)
+{
+        struct hanwang *hanwang = usb_get_intfdata(intf);
+
+        input_unregister_device(hanwang->dev);
+        usb_free_urb(hanwang->irq);
+        usb_free_coherent(interface_to_usbdev(intf),
+                        hanwang->features->pkg_len, hanwang->data,
+                        hanwang->data_dma);
+        kfree(hanwang);
+        usb_set_intfdata(intf, NULL);
+}
+
+static const struct usb_device_id hanwang_ids[] = {
+        { HANWANG_TABLET_DEVICE(USB_VENDOR_ID_HANWANG, HANWANG_TABLET_INT_CLASS,
+                HANWANG_TABLET_INT_SUB_CLASS, HANWANG_TABLET_INT_PROTOCOL) },
+        {}
+};
+
+MODULE_DEVICE_TABLE(usb, hanwang_ids);
+
+static struct usb_driver hanwang_driver = {
+        .name           = "hanwang",
+        .probe          = hanwang_probe,
+        .disconnect     = hanwang_disconnect,
+        .id_table       = hanwang_ids,
+};
+
+static int __init hanwang_init(void)
+{
+        return usb_register(&hanwang_driver);
+}
+
+static void __exit hanwang_exit(void)
+{
+        usb_deregister(&hanwang_driver);
+}
+
+module_init(hanwang_init);
+module_exit(hanwang_exit);
diff --git a/drivers/input/tablet/wacom.h b/drivers/input/tablet/wacom.h
index 284dfaab6b8c..de5adb109030 100644
--- a/drivers/input/tablet/wacom.h
+++ b/drivers/input/tablet/wacom.h
@@ -118,6 +118,7 @@ struct wacom {
 extern const struct usb_device_id wacom_ids[];
 
 void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len);
+void wacom_setup_device_quirks(struct wacom_features *features);
 void wacom_setup_input_capabilities(struct input_dev *input_dev,
                                     struct wacom_wac *wacom_wac);
 #endif
diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c
index b35876ee6908..fc381498b798 100644
--- a/drivers/input/tablet/wacom_sys.c
+++ b/drivers/input/tablet/wacom_sys.c
@@ -120,14 +120,16 @@ static int wacom_open(struct input_dev *dev)
 
 out:
         mutex_unlock(&wacom->lock);
-        if (retval)
-                usb_autopm_put_interface(wacom->intf);
+        usb_autopm_put_interface(wacom->intf);
         return retval;
 }
 
 static void wacom_close(struct input_dev *dev)
 {
         struct wacom *wacom = input_get_drvdata(dev);
+        int autopm_error;
+
+        autopm_error = usb_autopm_get_interface(wacom->intf);
 
         mutex_lock(&wacom->lock);
         usb_kill_urb(wacom->irq);
@@ -135,7 +137,8 @@ static void wacom_close(struct input_dev *dev)
         wacom->intf->needs_remote_wakeup = 0;
         mutex_unlock(&wacom->lock);
 
-        usb_autopm_put_interface(wacom->intf);
+        if (!autopm_error)
+                usb_autopm_put_interface(wacom->intf);
 }
 
 static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hid_desc,
@@ -196,17 +199,30 @@ static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hi
                                                         features->pktlen = WACOM_PKGLEN_TPC2FG;
                                                         features->device_type = BTN_TOOL_TRIPLETAP;
                                                 }
-                                                features->x_max =
-                                                        get_unaligned_le16(&report[i + 3]);
-                                                features->x_phy =
-                                                        get_unaligned_le16(&report[i + 6]);
-                                                features->unit = report[i + 9];
-                                                features->unitExpo = report[i + 11];
-                                                i += 12;
+                                                if (features->type == BAMBOO_PT) {
+                                                        /* need to reset back */
+                                                        features->pktlen = WACOM_PKGLEN_BBTOUCH;
+                                                        features->device_type = BTN_TOOL_TRIPLETAP;
+                                                        features->x_phy =
+                                                                get_unaligned_le16(&report[i + 5]);
+                                                        features->x_max =
+                                                                get_unaligned_le16(&report[i + 8]);
+                                                        i += 15;
+                                                } else {
+                                                        features->x_max =
+                                                                get_unaligned_le16(&report[i + 3]);
+                                                        features->x_phy =
+                                                                get_unaligned_le16(&report[i + 6]);
+                                                        features->unit = report[i + 9];
+                                                        features->unitExpo = report[i + 11];
+                                                        i += 12;
+                                                }
                                         } else if (pen) {
                                                 /* penabled only accepts exact bytes of data */
                                                 if (features->type == TABLETPC2FG)
                                                         features->pktlen = WACOM_PKGLEN_GRAPHIRE;
+                                                if (features->type == BAMBOO_PT)
+                                                        features->pktlen = WACOM_PKGLEN_BBFUN;
                                                 features->device_type = BTN_TOOL_PEN;
                                                 features->x_max =
                                                         get_unaligned_le16(&report[i + 3]);
@@ -235,6 +251,15 @@ static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hi
                                                         features->y_phy =
                                                                 get_unaligned_le16(&report[i + 6]);
                                                         i += 7;
+                                                } else if (features->type == BAMBOO_PT) {
+                                                        /* need to reset back */
+                                                        features->pktlen = WACOM_PKGLEN_BBTOUCH;
+                                                        features->device_type = BTN_TOOL_TRIPLETAP;
+                                                        features->y_phy =
+                                                                get_unaligned_le16(&report[i + 3]);
+                                                        features->y_max =
+                                                                get_unaligned_le16(&report[i + 6]);
+                                                        i += 12;
                                                 } else {
                                                         features->y_max =
                                                                 features->x_max;
@@ -246,6 +271,8 @@ static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hi
                                                 /* penabled only accepts exact bytes of data */
                                                 if (features->type == TABLETPC2FG)
                                                         features->pktlen = WACOM_PKGLEN_GRAPHIRE;
+                                                if (features->type == BAMBOO_PT)
+                                                        features->pktlen = WACOM_PKGLEN_BBFUN;
                                                 features->device_type = BTN_TOOL_PEN;
                                                 features->y_max =
                                                         get_unaligned_le16(&report[i + 3]);
@@ -296,8 +323,9 @@ static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_feat
         if (!rep_data)
                 return error;
 
-        /* ask to report tablet data if it is 2FGT or not a Tablet PC */
-        if (features->device_type == BTN_TOOL_TRIPLETAP) {
+        /* ask to report tablet data if it is 2FGT Tablet PC or
+         * not a Tablet PC */
+        if (features->type == TABLETPC2FG) {
                 do {
                         rep_data[0] = 3;
                         rep_data[1] = 4;
@@ -309,7 +337,7 @@ static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_feat
                                         WAC_HID_FEATURE_REPORT, report_id,
                                         rep_data, 3);
                 } while ((error < 0 || rep_data[1] != 4) && limit++ < 5);
-        } else if (features->type != TABLETPC && features->type != TABLETPC2FG) {
+        } else if (features->type != TABLETPC) {
                 do {
                         rep_data[0] = 2;
                         rep_data[1] = 2;
@@ -334,11 +362,16 @@ static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
         struct usb_host_interface *interface = intf->cur_altsetting;
         struct hid_descriptor *hid_desc;
 
-        /* default device to penabled */
+        /* default features */
         features->device_type = BTN_TOOL_PEN;
-
-        /* only Tablet PCs need to retrieve the info */
-        if ((features->type != TABLETPC) && (features->type != TABLETPC2FG))
+        features->x_fuzz = 4;
+        features->y_fuzz = 4;
+        features->pressure_fuzz = 0;
+        features->distance_fuzz = 0;
+
+        /* only Tablet PCs and Bamboo P&T need to retrieve the info */
+        if ((features->type != TABLETPC) && (features->type != TABLETPC2FG) &&
+            (features->type != BAMBOO_PT))
                 goto out;
 
         if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
@@ -353,12 +386,6 @@ static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
         if (error)
                 goto out;
 
-        /* touch device found but size is not defined. use default */
-        if (features->device_type == BTN_TOOL_DOUBLETAP && !features->x_max) {
-                features->x_max = 1023;
-                features->y_max = 1023;
-        }
-
  out:
         return error;
 }
@@ -494,9 +521,11 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
         if (error)
                 goto fail2;
 
+        wacom_setup_device_quirks(features);
+
         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
 
-        if (features->type == TABLETPC || features->type == TABLETPC2FG) {
+        if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
                 /* Append the device type to the name */
                 strlcat(wacom_wac->name,
                         features->device_type == BTN_TOOL_PEN ?
diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 47fd7a041c52..b3252ef1e279 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -857,6 +857,134 @@ static int wacom_tpc_irq(struct wacom_wac *wacom, size_t len)
         return retval;
 }
 
+static int wacom_bpt_touch(struct wacom_wac *wacom)
+{
+        struct wacom_features *features = &wacom->features;
+        struct input_dev *input = wacom->input;
+        unsigned char *data = wacom->data;
+        int sp = 0, sx = 0, sy = 0, count = 0;
+        int i;
+
+        for (i = 0; i < 2; i++) {
+                int p = data[9 * i + 2];
+                input_mt_slot(input, i);
+                /*
+                 * Touch events need to be disabled while stylus is
+                 * in proximity because user's hand is resting on touchpad
+                 * and sending unwanted events.  User expects tablet buttons
+                 * to continue working though.
+                 */
+                if (p && !wacom->shared->stylus_in_proximity) {
+                        int x = get_unaligned_be16(&data[9 * i + 3]) & 0x7ff;
+                        int y = get_unaligned_be16(&data[9 * i + 5]) & 0x7ff;
+                        if (features->quirks & WACOM_QUIRK_BBTOUCH_LOWRES) {
+                                x <<= 5;
+                                y <<= 5;
+                        }
+                        input_report_abs(input, ABS_MT_PRESSURE, p);
+                        input_report_abs(input, ABS_MT_POSITION_X, x);
+                        input_report_abs(input, ABS_MT_POSITION_Y, y);
+                        if (wacom->id[i] < 0)
+                                wacom->id[i] = wacom->trk_id++ & MAX_TRACKING_ID;
+                        if (!count++)
+                                sp = p, sx = x, sy = y;
+                } else {
+                        wacom->id[i] = -1;
+                }
+                input_report_abs(input, ABS_MT_TRACKING_ID, wacom->id[i]);
+        }
+
+        input_report_key(input, BTN_TOUCH, count > 0);
+        input_report_key(input, BTN_TOOL_FINGER, count == 1);
+        input_report_key(input, BTN_TOOL_DOUBLETAP, count == 2);
+
+        input_report_abs(input, ABS_PRESSURE, sp);
+        input_report_abs(input, ABS_X, sx);
+        input_report_abs(input, ABS_Y, sy);
+
+        input_report_key(input, BTN_LEFT, (data[1] & 0x08) != 0);
+        input_report_key(input, BTN_FORWARD, (data[1] & 0x04) != 0);
+        input_report_key(input, BTN_BACK, (data[1] & 0x02) != 0);
+        input_report_key(input, BTN_RIGHT, (data[1] & 0x01) != 0);
+
+        input_sync(input);
+
+        return 0;
+}
+
+static int wacom_bpt_pen(struct wacom_wac *wacom)
+{
+        struct input_dev *input = wacom->input;
+        unsigned char *data = wacom->data;
+        int prox = 0, x = 0, y = 0, p = 0, d = 0, pen = 0, btn1 = 0, btn2 = 0;
+
+        /*
+         * Similar to Graphire protocol, data[1] & 0x20 is proximity and
+         * data[1] & 0x18 is tool ID.  0x30 is safety check to ignore
+         * 2 unused tool ID's.
+         */
+        prox = (data[1] & 0x30) == 0x30;
+
+        /*
+         * All reports shared between PEN and RUBBER tool must be
+         * forced to a known starting value (zero) when transitioning to
+         * out-of-prox.
+         *
+         * If not reset then, to userspace, it will look like lost events
+         * if new tool comes in-prox with same values as previous tool sent.
+         *
+         * Hardware does report zero in most out-of-prox cases but not all.
+         */
+        if (prox) {
+                if (!wacom->shared->stylus_in_proximity) {
+                        if (data[1] & 0x08) {
+                                wacom->tool[0] = BTN_TOOL_RUBBER;
+                                wacom->id[0] = ERASER_DEVICE_ID;
+                        } else {
+                                wacom->tool[0] = BTN_TOOL_PEN;
+                                wacom->id[0] = STYLUS_DEVICE_ID;
+                        }
+                        wacom->shared->stylus_in_proximity = true;
+                }
+                x = le16_to_cpup((__le16 *)&data[2]);
+                y = le16_to_cpup((__le16 *)&data[4]);
+                p = le16_to_cpup((__le16 *)&data[6]);
+                d = data[8];
+                pen = data[1] & 0x01;
+                btn1 = data[1] & 0x02;
+                btn2 = data[1] & 0x04;
+        }
+
+        input_report_key(input, BTN_TOUCH, pen);
+        input_report_key(input, BTN_STYLUS, btn1);
+        input_report_key(input, BTN_STYLUS2, btn2);
+
+        input_report_abs(input, ABS_X, x);
+        input_report_abs(input, ABS_Y, y);
+        input_report_abs(input, ABS_PRESSURE, p);
+        input_report_abs(input, ABS_DISTANCE, d);
+
+        if (!prox) {
+                wacom->id[0] = 0;
+                wacom->shared->stylus_in_proximity = false;
+        }
+
+        input_report_key(input, wacom->tool[0], prox); /* PEN or RUBBER */
+        input_report_abs(input, ABS_MISC, wacom->id[0]); /* TOOL ID */
+
+        return 1;
+}
+
+static int wacom_bpt_irq(struct wacom_wac *wacom, size_t len)
+{
+        if (len == WACOM_PKGLEN_BBTOUCH)
+                return wacom_bpt_touch(wacom);
+        else if (len == WACOM_PKGLEN_BBFUN)
+                return wacom_bpt_pen(wacom);
+
+        return 0;
+}
+
 void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
 {
         bool sync;
@@ -902,6 +1030,10 @@ void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
                 sync = wacom_tpc_irq(wacom_wac, len);
                 break;
 
+        case BAMBOO_PT:
+                sync = wacom_bpt_irq(wacom_wac, len);
+                break;
+
         default:
                 sync = false;
                 break;
@@ -911,26 +1043,17 @@ void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
                 input_sync(wacom_wac->input);
 }
 
-static void wacom_setup_intuos(struct wacom_wac *wacom_wac)
+static void wacom_setup_cintiq(struct wacom_wac *wacom_wac)
 {
         struct input_dev *input_dev = wacom_wac->input;
 
         input_set_capability(input_dev, EV_MSC, MSC_SERIAL);
-        input_set_capability(input_dev, EV_REL, REL_WHEEL);
-
-        __set_bit(BTN_LEFT, input_dev->keybit);
-        __set_bit(BTN_RIGHT, input_dev->keybit);
-        __set_bit(BTN_MIDDLE, input_dev->keybit);
-        __set_bit(BTN_SIDE, input_dev->keybit);
-        __set_bit(BTN_EXTRA, input_dev->keybit);
 
         __set_bit(BTN_TOOL_RUBBER, input_dev->keybit);
         __set_bit(BTN_TOOL_PEN, input_dev->keybit);
-        __set_bit(BTN_TOOL_MOUSE, input_dev->keybit);
         __set_bit(BTN_TOOL_BRUSH, input_dev->keybit);
         __set_bit(BTN_TOOL_PENCIL, input_dev->keybit);
         __set_bit(BTN_TOOL_AIRBRUSH, input_dev->keybit);
-        __set_bit(BTN_TOOL_LENS, input_dev->keybit);
         __set_bit(BTN_STYLUS, input_dev->keybit);
         __set_bit(BTN_STYLUS2, input_dev->keybit);
 
@@ -939,10 +1062,55 @@ static void wacom_setup_intuos(struct wacom_wac *wacom_wac)
         input_set_abs_params(input_dev, ABS_WHEEL, 0, 1023, 0, 0);
         input_set_abs_params(input_dev, ABS_TILT_X, 0, 127, 0, 0);
         input_set_abs_params(input_dev, ABS_TILT_Y, 0, 127, 0, 0);
+}
+
+static void wacom_setup_intuos(struct wacom_wac *wacom_wac)
+{
+        struct input_dev *input_dev = wacom_wac->input;
+
+        input_set_capability(input_dev, EV_REL, REL_WHEEL);
+
+        wacom_setup_cintiq(wacom_wac);
+
+        __set_bit(BTN_LEFT, input_dev->keybit);
+        __set_bit(BTN_RIGHT, input_dev->keybit);
+        __set_bit(BTN_MIDDLE, input_dev->keybit);
+        __set_bit(BTN_SIDE, input_dev->keybit);
+        __set_bit(BTN_EXTRA, input_dev->keybit);
+        __set_bit(BTN_TOOL_MOUSE, input_dev->keybit);
+        __set_bit(BTN_TOOL_LENS, input_dev->keybit);
+
         input_set_abs_params(input_dev, ABS_RZ, -900, 899, 0, 0);
         input_set_abs_params(input_dev, ABS_THROTTLE, -1023, 1023, 0, 0);
 }
 
+void wacom_setup_device_quirks(struct wacom_features *features)
+{
+
+        /* touch device found but size is not defined. use default */
+        if (features->device_type == BTN_TOOL_DOUBLETAP && !features->x_max) {
+                features->x_max = 1023;
+                features->y_max = 1023;
+        }
+
+        /* these device have multiple inputs */
+        if (features->type == TABLETPC || features->type == TABLETPC2FG ||
+            features->type == BAMBOO_PT)
+                features->quirks |= WACOM_QUIRK_MULTI_INPUT;
+
+        /* quirks for bamboo touch */
+        if (features->type == BAMBOO_PT &&
+            features->device_type == BTN_TOOL_TRIPLETAP) {
+                features->x_max <<= 5;
+                features->y_max <<= 5;
+                features->x_fuzz <<= 5;
+                features->y_fuzz <<= 5;
+                features->pressure_max = 256;
+                features->pressure_fuzz = 16;
+                features->quirks |= WACOM_QUIRK_BBTOUCH_LOWRES;
+        }
+}
+
 void wacom_setup_input_capabilities(struct input_dev *input_dev,
                                     struct wacom_wac *wacom_wac)
 {
@@ -953,9 +1121,12 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,
 
         __set_bit(BTN_TOUCH, input_dev->keybit);
 
-        input_set_abs_params(input_dev, ABS_X, 0, features->x_max, 4, 0);
-        input_set_abs_params(input_dev, ABS_Y, 0, features->y_max, 4, 0);
-        input_set_abs_params(input_dev, ABS_PRESSURE, 0, features->pressure_max, 0, 0);
+        input_set_abs_params(input_dev, ABS_X, 0, features->x_max,
+                             features->x_fuzz, 0);
+        input_set_abs_params(input_dev, ABS_Y, 0, features->y_max,
+                             features->y_fuzz, 0);
+        input_set_abs_params(input_dev, ABS_PRESSURE, 0, features->pressure_max,
+                             features->pressure_fuzz, 0);
 
         __set_bit(ABS_MISC, input_dev->absbit);
 
@@ -1005,9 +1176,19 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,
                 __set_bit(BTN_9, input_dev->keybit);
                 /* fall through */
 
+        case CINTIQ:
+                for (i = 0; i < 8; i++)
+                        __set_bit(BTN_0 + i, input_dev->keybit);
+                __set_bit(BTN_TOOL_FINGER, input_dev->keybit);
+
+                input_set_abs_params(input_dev, ABS_RX, 0, 4096, 0, 0);
+                input_set_abs_params(input_dev, ABS_RY, 0, 4096, 0, 0);
+                input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0);
+                wacom_setup_cintiq(wacom_wac);
+                break;
+
         case INTUOS3:
         case INTUOS3L:
-        case CINTIQ:
                 __set_bit(BTN_4, input_dev->keybit);
                 __set_bit(BTN_5, input_dev->keybit);
                 __set_bit(BTN_6, input_dev->keybit);
@@ -1078,6 +1259,38 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,
         case PENPARTNER:
                 __set_bit(BTN_TOOL_RUBBER, input_dev->keybit);
                 break;
+
+        case BAMBOO_PT:
+                __clear_bit(ABS_MISC, input_dev->absbit);
+
+                if (features->device_type == BTN_TOOL_TRIPLETAP) {
+                        __set_bit(BTN_LEFT, input_dev->keybit);
+                        __set_bit(BTN_FORWARD, input_dev->keybit);
+                        __set_bit(BTN_BACK, input_dev->keybit);
+                        __set_bit(BTN_RIGHT, input_dev->keybit);
+
+                        __set_bit(BTN_TOOL_FINGER, input_dev->keybit);
+                        __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
+
+                        input_mt_create_slots(input_dev, 2);
+                        input_set_abs_params(input_dev, ABS_MT_POSITION_X,
+                                             0, features->x_max,
+                                             features->x_fuzz, 0);
+                        input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
+                                             0, features->y_max,
+                                             features->y_fuzz, 0);
+                        input_set_abs_params(input_dev, ABS_MT_PRESSURE,
+                                             0, features->pressure_max,
+                                             features->pressure_fuzz, 0);
+                        input_set_abs_params(input_dev, ABS_MT_TRACKING_ID, 0,
+                                             MAX_TRACKING_ID, 0, 0);
+                } else if (features->device_type == BTN_TOOL_PEN) {
+                        __set_bit(BTN_TOOL_RUBBER, input_dev->keybit);
+                        __set_bit(BTN_TOOL_PEN, input_dev->keybit);
+                        __set_bit(BTN_STYLUS, input_dev->keybit);
+                        __set_bit(BTN_STYLUS2, input_dev->keybit);
+                }
+                break;
         }
 }
 
@@ -1215,6 +1428,14 @@ static const struct wacom_features wacom_features_0xE3 =
         { "Wacom ISDv4 E3",       WACOM_PKGLEN_TPC2FG,    26202, 16325,  255,  0, TABLETPC2FG };
 static const struct wacom_features wacom_features_0x47 =
         { "Wacom Intuos2 6x8",    WACOM_PKGLEN_INTUOS,    20320, 16240, 1023, 31, INTUOS };
+static struct wacom_features wacom_features_0xD0 =
+        { "Wacom Bamboo 2FG",     WACOM_PKGLEN_BBFUN,     14720,  9200, 1023, 63, BAMBOO_PT };
+static struct wacom_features wacom_features_0xD1 =
+        { "Wacom Bamboo 2FG 4x5", WACOM_PKGLEN_BBFUN,     14720,  9200, 1023, 63, BAMBOO_PT };
+static struct wacom_features wacom_features_0xD2 =
+        { "Wacom Bamboo Craft",   WACOM_PKGLEN_BBFUN,     14720,  9200, 1023, 63, BAMBOO_PT };
+static struct wacom_features wacom_features_0xD3 =
+        { "Wacom Bamboo 2FG 6x8", WACOM_PKGLEN_BBFUN,     21648, 13530, 1023, 63, BAMBOO_PT };
 
 #define USB_DEVICE_WACOM(prod)                                  \
         USB_DEVICE(USB_VENDOR_ID_WACOM, prod),                  \
@@ -1279,6 +1500,10 @@ const struct usb_device_id wacom_ids[] = {
         { USB_DEVICE_WACOM(0xC6) },
         { USB_DEVICE_WACOM(0xC7) },
         { USB_DEVICE_WACOM(0xCE) },
+        { USB_DEVICE_WACOM(0xD0) },
+        { USB_DEVICE_WACOM(0xD1) },
+        { USB_DEVICE_WACOM(0xD2) },
+        { USB_DEVICE_WACOM(0xD3) },
         { USB_DEVICE_WACOM(0xF0) },
         { USB_DEVICE_WACOM(0xCC) },
         { USB_DEVICE_WACOM(0x90) },
diff --git a/drivers/input/tablet/wacom_wac.h b/drivers/input/tablet/wacom_wac.h
index 99e1a54cd305..00ca01541d89 100644
--- a/drivers/input/tablet/wacom_wac.h
+++ b/drivers/input/tablet/wacom_wac.h
@@ -21,6 +21,7 @@
 #define WACOM_PKGLEN_INTUOS     10
 #define WACOM_PKGLEN_TPC1FG      5
 #define WACOM_PKGLEN_TPC2FG     14
+#define WACOM_PKGLEN_BBTOUCH    20
 
 /* device IDs */
 #define STYLUS_DEVICE_ID        0x02
@@ -37,6 +38,13 @@
 #define WACOM_REPORT_TPC1FG             6
 #define WACOM_REPORT_TPC2FG             13
 
+/* device quirks */
+#define WACOM_QUIRK_MULTI_INPUT         0x0001
+#define WACOM_QUIRK_BBTOUCH_LOWRES      0x0002
+
+/* largest reported tracking id */
+#define MAX_TRACKING_ID                 0xfff
+
 enum {
         PENPARTNER = 0,
         GRAPHIRE,
@@ -44,6 +52,7 @@ enum {
         PTU,
         PL,
         DTU,
+        BAMBOO_PT,
         INTUOS,
         INTUOS3S,
         INTUOS3,
@@ -73,6 +82,11 @@ struct wacom_features {
         int y_phy;
         unsigned char unit;
         unsigned char unitExpo;
+        int x_fuzz;
+        int y_fuzz;
+        int pressure_fuzz;
+        int distance_fuzz;
+        unsigned quirks;
 };
 
 struct wacom_shared {
@@ -86,6 +100,7 @@ struct wacom_wac {
         int id[3];
         __u32 serial[2];
         int last_finger;
+        int trk_id;
         struct wacom_features features;
         struct wacom_shared *shared;
         struct input_dev *input;
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 0069d9703fda..0ea361f23fa7 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -98,6 +98,18 @@ config TOUCHSCREEN_BITSY
           To compile this driver as a module, choose M here: the
           module will be called h3600_ts_input.
 
+config TOUCHSCREEN_BU21013
+        tristate "BU21013 based touch panel controllers"
+        depends on I2C
+        help
+          Say Y here if you have a bu21013 touchscreen connected to
+          your system.
+
+          If unsure, say N.
+
+          To compile this driver as a module, choose M here: the
+          module will be called bu21013_ts.
+
 config TOUCHSCREEN_CY8CTMG110
         tristate "cy8ctmg110 touchscreen"
         depends on I2C
@@ -214,6 +226,16 @@ config TOUCHSCREEN_WACOM_W8001
           To compile this driver as a module, choose M here: the
           module will be called wacom_w8001.
 
+config TOUCHSCREEN_LPC32XX
+        tristate "LPC32XX touchscreen controller"
+        depends on ARCH_LPC32XX
+        help
+          Say Y here if you have a LPC32XX device and want
+          to support the built-in touchscreen.
+
+          To compile this driver as a module, choose M here: the
+          module will be called lpc32xx_ts.
+
 config TOUCHSCREEN_MCS5000
         tristate "MELFAS MCS-5000 touchscreen"
         depends on I2C
@@ -250,6 +272,18 @@ config TOUCHSCREEN_INEXIO
           To compile this driver as a module, choose M here: the
           module will be called inexio.
 
+config TOUCHSCREEN_INTEL_MID
+        tristate "Intel MID platform resistive touchscreen"
+        depends on INTEL_SCU_IPC
+        help
+          Say Y here if you have a Intel MID based touchscreen in
+          your system.
+
+          If unsure, say N.
+
+          To compile this driver as a module, choose M here: the
+          module will be called intel_mid_touch.
+
 config TOUCHSCREEN_MK712
         tristate "ICS MicroClock MK712 touchscreen"
         help
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 28217e1dcafd..99b353c4e9ae 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_TOUCHSCREEN_AD7879_SPI)	+= ad7879-spi.o
 obj-$(CONFIG_TOUCHSCREEN_ADS7846)       += ads7846.o
 obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC)  += atmel_tsadcc.o
 obj-$(CONFIG_TOUCHSCREEN_BITSY)         += h3600_ts_input.o
+obj-$(CONFIG_TOUCHSCREEN_BU21013)       += bu21013_ts.o
 obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110)    += cy8ctmg110_ts.o
 obj-$(CONFIG_TOUCHSCREEN_DA9034)        += da9034-ts.o
 obj-$(CONFIG_TOUCHSCREEN_DYNAPRO)       += dynapro.o
@@ -23,6 +24,8 @@ obj-$(CONFIG_TOUCHSCREEN_EETI)		+= eeti_ts.o
 obj-$(CONFIG_TOUCHSCREEN_ELO)           += elo.o
 obj-$(CONFIG_TOUCHSCREEN_FUJITSU)       += fujitsu_ts.o
 obj-$(CONFIG_TOUCHSCREEN_INEXIO)        += inexio.o
+obj-$(CONFIG_TOUCHSCREEN_INTEL_MID)     += intel-mid-touch.o
+obj-$(CONFIG_TOUCHSCREEN_LPC32XX)       += lpc32xx_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MC13783)       += mc13783_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MCS5000)       += mcs5000_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MIGOR)         += migor_ts.o
diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c
index 5f0221cffef9..a1952fcc083e 100644
--- a/drivers/input/touchscreen/ad7877.c
+++ b/drivers/input/touchscreen/ad7877.c
@@ -191,13 +191,12 @@ struct ad7877 {
         struct spi_message      msg;
 
         struct mutex            mutex;
-        unsigned                disabled:1;     /* P: mutex */
-        unsigned                gpio3:1;        /* P: mutex */
-        unsigned                gpio4:1;        /* P: mutex */
+        bool                    disabled;       /* P: mutex */
+        bool                    gpio3;          /* P: mutex */
+        bool                    gpio4;          /* P: mutex */
 
         spinlock_t              lock;
         struct timer_list       timer;          /* P: lock */
-        unsigned                pending:1;      /* P: lock */
 
         /*
          * DMA (thus cache coherency maintenance) requires the
@@ -206,8 +205,8 @@ struct ad7877 {
         u16 conversion_data[AD7877_NR_SENSE] ____cacheline_aligned;
 };
 
-static int gpio3;
-module_param(gpio3, int, 0);
+static bool gpio3;
+module_param(gpio3, bool, 0);
 MODULE_PARM_DESC(gpio3, "If gpio3 is set to 1 AUX3 acts as GPIO3");
 
 /*
@@ -230,6 +229,7 @@ static int ad7877_read(struct spi_device *spi, u16 reg)
                         AD7877_READADD(reg));
         req->xfer[0].tx_buf = &req->command;
         req->xfer[0].len = 2;
+        req->xfer[0].cs_change = 1;
 
         req->xfer[1].rx_buf = &req->sample;
         req->xfer[1].len = 2;
@@ -295,20 +295,25 @@ static int ad7877_read_adc(struct spi_device *spi, unsigned command)
 
         req->xfer[0].tx_buf = &req->reset;
         req->xfer[0].len = 2;
+        req->xfer[0].cs_change = 1;
 
         req->xfer[1].tx_buf = &req->ref_on;
         req->xfer[1].len = 2;
         req->xfer[1].delay_usecs = ts->vref_delay_usecs;
+        req->xfer[1].cs_change = 1;
 
         req->xfer[2].tx_buf = &req->command;
         req->xfer[2].len = 2;
         req->xfer[2].delay_usecs = ts->vref_delay_usecs;
+        req->xfer[2].cs_change = 1;
 
         req->xfer[3].rx_buf = &req->sample;
         req->xfer[3].len = 2;
+        req->xfer[3].cs_change = 1;
 
         req->xfer[4].tx_buf = &ts->cmd_crtl2;   /*REF OFF*/
         req->xfer[4].len = 2;
+        req->xfer[4].cs_change = 1;
 
         req->xfer[5].tx_buf = &ts->cmd_crtl1;   /*DEFAULT*/
         req->xfer[5].len = 2;
@@ -327,7 +332,7 @@ static int ad7877_read_adc(struct spi_device *spi, unsigned command)
         return status ? : sample;
 }
 
-static void ad7877_rx(struct ad7877 *ts)
+static int ad7877_process_data(struct ad7877 *ts)
 {
         struct input_dev *input_dev = ts->input;
         unsigned Rt;
@@ -354,11 +359,25 @@ static void ad7877_rx(struct ad7877 *ts)
                 Rt /= z1;
                 Rt = (Rt + 2047) >> 12;
 
+                /*
+                 * Sample found inconsistent, pressure is beyond
+                 * the maximum. Don't report it to user space.
+                 */
+                if (Rt > ts->pressure_max)
+                        return -EINVAL;
+
+                if (!timer_pending(&ts->timer))
+                        input_report_key(input_dev, BTN_TOUCH, 1);
+
                 input_report_abs(input_dev, ABS_X, x);
                 input_report_abs(input_dev, ABS_Y, y);
                 input_report_abs(input_dev, ABS_PRESSURE, Rt);
                 input_sync(input_dev);
+
+                return 0;
         }
+
+        return -EINVAL;
 }
 
 static inline void ad7877_ts_event_release(struct ad7877 *ts)
@@ -366,72 +385,56 @@ static inline void ad7877_ts_event_release(struct ad7877 *ts)
         struct input_dev *input_dev = ts->input;
 
         input_report_abs(input_dev, ABS_PRESSURE, 0);
+        input_report_key(input_dev, BTN_TOUCH, 0);
         input_sync(input_dev);
 }
 
 static void ad7877_timer(unsigned long handle)
 {
         struct ad7877 *ts = (void *)handle;
+        unsigned long flags;
 
+        spin_lock_irqsave(&ts->lock, flags);
         ad7877_ts_event_release(ts);
+        spin_unlock_irqrestore(&ts->lock, flags);
 }
 
 static irqreturn_t ad7877_irq(int irq, void *handle)
 {
         struct ad7877 *ts = handle;
         unsigned long flags;
-        int status;
+        int error;
 
-        /*
-         * The repeated conversion sequencer controlled by TMR kicked off
-         * too fast. We ignore the last and process the sample sequence
-         * currently in the queue. It can't be older than 9.4ms, and we
-         * need to avoid that ts->msg doesn't get issued twice while in work.
-         */
+        error = spi_sync(ts->spi, &ts->msg);
+        if (error) {
+                dev_err(&ts->spi->dev, "spi_sync --> %d\n", error);
+                goto out;
+        }
 
         spin_lock_irqsave(&ts->lock, flags);
-        if (!ts->pending) {
-                ts->pending = 1;
-
-                status = spi_async(ts->spi, &ts->msg);
-                if (status)
-                        dev_err(&ts->spi->dev, "spi_sync --> %d\n", status);
-        }
+        error = ad7877_process_data(ts);
+        if (!error)
+                mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT);
         spin_unlock_irqrestore(&ts->lock, flags);
 
+out:
         return IRQ_HANDLED;
 }
 
-static void ad7877_callback(void *_ts)
-{
-        struct ad7877 *ts = _ts;
-
-        spin_lock_irq(&ts->lock);
-
-        ad7877_rx(ts);
-        ts->pending = 0;
-        mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT);
-
-        spin_unlock_irq(&ts->lock);
-}
-
 static void ad7877_disable(struct ad7877 *ts)
 {
         mutex_lock(&ts->mutex);
 
         if (!ts->disabled) {
-                ts->disabled = 1;
+                ts->disabled = true;
                 disable_irq(ts->spi->irq);
 
-                /* Wait for spi_async callback */
-                while (ts->pending)
-                        msleep(1);
-
                 if (del_timer_sync(&ts->timer))
                         ad7877_ts_event_release(ts);
         }
 
-        /* we know the chip's in lowpower mode since we always
+        /*
+         * We know the chip's in lowpower mode since we always
          * leave it that way after every request
          */
 
@@ -443,7 +446,7 @@ static void ad7877_enable(struct ad7877 *ts)
         mutex_lock(&ts->mutex);
 
         if (ts->disabled) {
-                ts->disabled = 0;
+                ts->disabled = false;
                 enable_irq(ts->spi->irq);
         }
 
@@ -453,7 +456,7 @@ static void ad7877_enable(struct ad7877 *ts)
 #define SHOW(name) static ssize_t \
 name ## _show(struct device *dev, struct device_attribute *attr, char *buf) \
 { \
-        struct ad7877   *ts = dev_get_drvdata(dev); \
+        struct ad7877 *ts = dev_get_drvdata(dev); \
         ssize_t v = ad7877_read_adc(ts->spi, \
                         AD7877_READ_CHAN(name)); \
         if (v < 0) \
@@ -473,7 +476,7 @@ SHOW(temp2)
 static ssize_t ad7877_disable_show(struct device *dev,
                                      struct device_attribute *attr, char *buf)
 {
-        struct ad7877   *ts = dev_get_drvdata(dev);
+        struct ad7877 *ts = dev_get_drvdata(dev);
 
         return sprintf(buf, "%u\n", ts->disabled);
 }
@@ -503,7 +506,7 @@ static DEVICE_ATTR(disable, 0664, ad7877_disable_show, ad7877_disable_store);
 static ssize_t ad7877_dac_show(struct device *dev,
                                      struct device_attribute *attr, char *buf)
 {
-        struct ad7877   *ts = dev_get_drvdata(dev);
+        struct ad7877 *ts = dev_get_drvdata(dev);
 
         return sprintf(buf, "%u\n", ts->dac);
 }
@@ -533,7 +536,7 @@ static DEVICE_ATTR(dac, 0664, ad7877_dac_show, ad7877_dac_store);
 static ssize_t ad7877_gpio3_show(struct device *dev,
                                      struct device_attribute *attr, char *buf)
 {
-        struct ad7877   *ts = dev_get_drvdata(dev);
+        struct ad7877 *ts = dev_get_drvdata(dev);
 
         return sprintf(buf, "%u\n", ts->gpio3);
 }
@@ -564,7 +567,7 @@ static DEVICE_ATTR(gpio3, 0664, ad7877_gpio3_show, ad7877_gpio3_store);
 static ssize_t ad7877_gpio4_show(struct device *dev,
                                      struct device_attribute *attr, char *buf)
 {
-        struct ad7877   *ts = dev_get_drvdata(dev);
+        struct ad7877 *ts = dev_get_drvdata(dev);
 
         return sprintf(buf, "%u\n", ts->gpio4);
 }
@@ -597,16 +600,35 @@ static struct attribute *ad7877_attributes[] = {
         &dev_attr_temp2.attr,
         &dev_attr_aux1.attr,
         &dev_attr_aux2.attr,
+        &dev_attr_aux3.attr,
         &dev_attr_bat1.attr,
         &dev_attr_bat2.attr,
         &dev_attr_disable.attr,
         &dev_attr_dac.attr,
+        &dev_attr_gpio3.attr,
         &dev_attr_gpio4.attr,
         NULL
 };
 
+static mode_t ad7877_attr_is_visible(struct kobject *kobj,
+                                     struct attribute *attr, int n)
+{
+        mode_t mode = attr->mode;
+
+        if (attr == &dev_attr_aux3.attr) {
+                if (gpio3)
+                        mode = 0;
+        } else if (attr == &dev_attr_gpio3.attr) {
+                if (!gpio3)
+                        mode = 0;
+        }
+
+        return mode;
+}
+
 static const struct attribute_group ad7877_attr_group = {
-        .attrs = ad7877_attributes,
+        .is_visible     = ad7877_attr_is_visible,
+        .attrs          = ad7877_attributes,
 };
 
 static void ad7877_setup_ts_def_msg(struct spi_device *spi, struct ad7877 *ts)
@@ -635,22 +657,25 @@ static void ad7877_setup_ts_def_msg(struct spi_device *spi, struct ad7877 *ts)
 
         spi_message_init(m);
 
-        m->complete = ad7877_callback;
         m->context = ts;
 
         ts->xfer[0].tx_buf = &ts->cmd_crtl1;
         ts->xfer[0].len = 2;
+        ts->xfer[0].cs_change = 1;
 
         spi_message_add_tail(&ts->xfer[0], m);
 
         ts->xfer[1].tx_buf = &ts->cmd_dummy; /* Send ZERO */
         ts->xfer[1].len = 2;
+        ts->xfer[1].cs_change = 1;
 
         spi_message_add_tail(&ts->xfer[1], m);
 
-        for (i = 0; i < 11; i++) {
+        for (i = 0; i < AD7877_NR_SENSE; i++) {
                 ts->xfer[i + 2].rx_buf = &ts->conversion_data[AD7877_SEQ_YPOS + i];
                 ts->xfer[i + 2].len = 2;
+                if (i < (AD7877_NR_SENSE - 1))
+                        ts->xfer[i + 2].cs_change = 1;
                 spi_message_add_tail(&ts->xfer[i + 2], m);
         }
 }
@@ -718,6 +743,8 @@ static int __devinit ad7877_probe(struct spi_device *spi)
         input_dev->phys = ts->phys;
         input_dev->dev.parent = &spi->dev;
 
+        __set_bit(EV_KEY, input_dev->evbit);
+        __set_bit(BTN_TOUCH, input_dev->keybit);
         __set_bit(EV_ABS, input_dev->evbit);
         __set_bit(ABS_X, input_dev->absbit);
         __set_bit(ABS_Y, input_dev->absbit);
@@ -752,8 +779,9 @@ static int __devinit ad7877_probe(struct spi_device *spi)
 
         /* Request AD7877 /DAV GPIO interrupt */
 
-        err = request_irq(spi->irq, ad7877_irq, IRQF_TRIGGER_FALLING,
-                        spi->dev.driver->name, ts);
+        err = request_threaded_irq(spi->irq, NULL, ad7877_irq,
+                                   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+                                   spi->dev.driver->name, ts);
         if (err) {
                 dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq);
                 goto err_free_mem;
@@ -763,20 +791,12 @@ static int __devinit ad7877_probe(struct spi_device *spi)
         if (err)
                 goto err_free_irq;
 
-        err = device_create_file(&spi->dev,
-                                 gpio3 ? &dev_attr_gpio3 : &dev_attr_aux3);
-        if (err)
-                goto err_remove_attr_group;
-
         err = input_register_device(input_dev);
         if (err)
-                goto err_remove_attr;
+                goto err_remove_attr_group;
 
         return 0;
 
-err_remove_attr:
-        device_remove_file(&spi->dev,
-                           gpio3 ? &dev_attr_gpio3 : &dev_attr_aux3);
 err_remove_attr_group:
         sysfs_remove_group(&spi->dev.kobj, &ad7877_attr_group);
 err_free_irq:
@@ -790,11 +810,9 @@ err_free_mem:
 
 static int __devexit ad7877_remove(struct spi_device *spi)
 {
-        struct ad7877           *ts = dev_get_drvdata(&spi->dev);
+        struct ad7877 *ts = dev_get_drvdata(&spi->dev);
 
         sysfs_remove_group(&spi->dev.kobj, &ad7877_attr_group);
-        device_remove_file(&spi->dev,
-                           gpio3 ? &dev_attr_gpio3 : &dev_attr_aux3);
 
         ad7877_disable(ts);
         free_irq(ts->spi->irq, ts);
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 16031933a8f6..14ea54b78e46 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -17,9 +17,11 @@
  *  it under the terms of the GNU General Public License version 2 as
  *  published by the Free Software Foundation.
  */
+#include <linux/types.h>
 #include <linux/hwmon.h>
 #include <linux/init.h>
 #include <linux/err.h>
+#include <linux/sched.h>
 #include <linux/delay.h>
 #include <linux/input.h>
 #include <linux/interrupt.h>
@@ -52,22 +54,23 @@
  * files.
  */
 
-#define TS_POLL_DELAY   (1 * 1000000)   /* ns delay before the first sample */
-#define TS_POLL_PERIOD  (5 * 1000000)   /* ns delay between samples */
+#define TS_POLL_DELAY   1       /* ms delay before the first sample */
+#define TS_POLL_PERIOD  5       /* ms delay between samples */
 
 /* this driver doesn't aim at the peak continuous sample rate */
 #define SAMPLE_BITS     (8 /*cmd*/ + 16 /*sample*/ + 2 /* before, after */)
 
 struct ts_event {
-        /* For portability, we can't read 12 bit values using SPI (which
-         * would make the controller deliver them as native byteorder u16
+        /*
+         * For portability, we can't read 12 bit values using SPI (which
+         * would make the controller deliver them as native byte order u16
          * with msbs zeroed).  Instead, we read them as two 8-bit values,
          * *** WHICH NEED BYTESWAPPING *** and range adjustment.
          */
         u16     x;
         u16     y;
         u16     z1, z2;
-        int     ignore;
+        bool    ignore;
         u8      x_buf[3];
         u8      y_buf[3];
 };
@@ -110,8 +113,11 @@ struct ads7846 {
 
         struct spi_transfer     xfer[18];
         struct spi_message      msg[5];
-        struct spi_message      *last_msg;
-        int                     msg_idx;
+        int                     msg_count;
+        wait_queue_head_t       wait;
+
+        bool                    pendown;
+
         int                     read_cnt;
         int                     read_rep;
         int                     last_read;
@@ -122,14 +128,10 @@ struct ads7846 {
 
         u16                     penirq_recheck_delay_usecs;
 
-        spinlock_t              lock;
-        struct hrtimer          timer;
-        unsigned                pendown:1;      /* P: lock */
-        unsigned                pending:1;      /* P: lock */
-// FIXME remove "irq_disabled"
-        unsigned                irq_disabled:1; /* P: lock */
-        unsigned                disabled:1;
-        unsigned                is_suspended:1;
+        struct mutex            lock;
+        bool                    stopped;        /* P: lock */
+        bool                    disabled;       /* P: lock */
+        bool                    suspended;      /* P: lock */
 
         int                     (*filter)(void *data, int data_idx, int *val);
         void                    *filter_data;
@@ -165,7 +167,7 @@ struct ads7846 {
 #define ADS_12_BIT              (0 << 3)
 #define ADS_SER                 (1 << 2)        /* non-differential */
 #define ADS_DFR                 (0 << 2)        /* differential */
-#define ADS_PD10_PDOWN          (0 << 0)        /* lowpower mode + penirq */
+#define ADS_PD10_PDOWN          (0 << 0)        /* low power mode + penirq */
 #define ADS_PD10_ADC_ON         (1 << 0)        /* ADC on */
 #define ADS_PD10_REF_ON         (2 << 0)        /* vREF on + penirq */
 #define ADS_PD10_ALL_ON         (3 << 0)        /* ADC + vREF on */
@@ -193,6 +195,78 @@ struct ads7846 {
 #define REF_ON  (READ_12BIT_DFR(x, 1, 1))
 #define REF_OFF (READ_12BIT_DFR(y, 0, 0))
 
+/* Must be called with ts->lock held */
+static void ads7846_stop(struct ads7846 *ts)
+{
+        if (!ts->disabled && !ts->suspended) {
+                /* Signal IRQ thread to stop polling and disable the handler. */
+                ts->stopped = true;
+                mb();
+                wake_up(&ts->wait);
+                disable_irq(ts->spi->irq);
+        }
+}
+
+/* Must be called with ts->lock held */
+static void ads7846_restart(struct ads7846 *ts)
+{
+        if (!ts->disabled && !ts->suspended) {
+                /* Tell IRQ thread that it may poll the device. */
+                ts->stopped = false;
+                mb();
+                enable_irq(ts->spi->irq);
+        }
+}
+
+/* Must be called with ts->lock held */
+static void __ads7846_disable(struct ads7846 *ts)
+{
+        ads7846_stop(ts);
+        regulator_disable(ts->reg);
+
+        /*
+         * We know the chip's in low power mode since we always
+         * leave it that way after every request
+         */
+}
+
+/* Must be called with ts->lock held */
+static void __ads7846_enable(struct ads7846 *ts)
+{
+        regulator_enable(ts->reg);
+        ads7846_restart(ts);
+}
+
+static void ads7846_disable(struct ads7846 *ts)
+{
+        mutex_lock(&ts->lock);
+
+        if (!ts->disabled) {
+
+                if  (!ts->suspended)
+                        __ads7846_disable(ts);
+
+                ts->disabled = true;
+        }
+
+        mutex_unlock(&ts->lock);
+}
+
+static void ads7846_enable(struct ads7846 *ts)
+{
+        mutex_lock(&ts->lock);
+
+        if (ts->disabled) {
+
+                ts->disabled = false;
+
+                if (!ts->suspended)
+                        __ads7846_enable(ts);
+        }
+
+        mutex_unlock(&ts->lock);
+}
+
 /*--------------------------------------------------------------------------*/
 
 /*
@@ -219,23 +293,15 @@ struct ads7845_ser_req {
         struct spi_transfer     xfer[2];
 };
 
-static void ads7846_enable(struct ads7846 *ts);
-static void ads7846_disable(struct ads7846 *ts);
-
-static int device_suspended(struct device *dev)
-{
-        struct ads7846 *ts = dev_get_drvdata(dev);
-        return ts->is_suspended || ts->disabled;
-}
-
 static int ads7846_read12_ser(struct device *dev, unsigned command)
 {
-        struct spi_device       *spi = to_spi_device(dev);
-        struct ads7846          *ts = dev_get_drvdata(dev);
-        struct ser_req          *req = kzalloc(sizeof *req, GFP_KERNEL);
-        int                     status;
-        int                     use_internal;
+        struct spi_device *spi = to_spi_device(dev);
+        struct ads7846 *ts = dev_get_drvdata(dev);
+        struct ser_req *req;
+        int status;
+        int use_internal;
 
+        req = kzalloc(sizeof *req, GFP_KERNEL);
         if (!req)
                 return -ENOMEM;
 
@@ -282,11 +348,11 @@ static int ads7846_read12_ser(struct device *dev, unsigned command)
         CS_CHANGE(req->xfer[5]);
         spi_message_add_tail(&req->xfer[5], &req->msg);
 
-        ts->irq_disabled = 1;
-        disable_irq(spi->irq);
+        mutex_lock(&ts->lock);
+        ads7846_stop(ts);
         status = spi_sync(spi, &req->msg);
-        ts->irq_disabled = 0;
-        enable_irq(spi->irq);
+        ads7846_restart(ts);
+        mutex_unlock(&ts->lock);
 
         if (status == 0) {
                 /* on-wire is a must-ignore bit, a BE12 value, then padding */
@@ -301,11 +367,12 @@ static int ads7846_read12_ser(struct device *dev, unsigned command)
 
 static int ads7845_read12_ser(struct device *dev, unsigned command)
 {
-        struct spi_device       *spi = to_spi_device(dev);
-        struct ads7846          *ts = dev_get_drvdata(dev);
-        struct ads7845_ser_req  *req = kzalloc(sizeof *req, GFP_KERNEL);
-        int                     status;
+        struct spi_device *spi = to_spi_device(dev);
+        struct ads7846 *ts = dev_get_drvdata(dev);
+        struct ads7845_ser_req *req;
+        int status;
 
+        req = kzalloc(sizeof *req, GFP_KERNEL);
         if (!req)
                 return -ENOMEM;
 
@@ -317,11 +384,11 @@ static int ads7845_read12_ser(struct device *dev, unsigned command)
         req->xfer[0].len = 3;
         spi_message_add_tail(&req->xfer[0], &req->msg);
 
-        ts->irq_disabled = 1;
-        disable_irq(spi->irq);
+        mutex_lock(&ts->lock);
+        ads7846_stop(ts);
         status = spi_sync(spi, &req->msg);
-        ts->irq_disabled = 0;
-        enable_irq(spi->irq);
+        ads7846_restart(ts);
+        mutex_unlock(&ts->lock);
 
         if (status == 0) {
                 /* BE12 value, then padding */
@@ -374,6 +441,7 @@ static inline unsigned vaux_adjust(struct ads7846 *ts, ssize_t v)
         /* external resistors may scale vAUX into 0..vREF */
         retval *= ts->vref_mv;
         retval = retval >> 12;
+
         return retval;
 }
 
@@ -384,13 +452,13 @@ static inline unsigned vbatt_adjust(struct ads7846 *ts, ssize_t v)
         /* ads7846 has a resistor ladder to scale this signal down */
         if (ts->model == 7846)
                 retval *= 4;
+
         return retval;
 }
 
 SHOW(in0_input, vaux, vaux_adjust)
 SHOW(in1_input, vbatt, vbatt_adjust)
 
-
 static struct attribute *ads7846_attributes[] = {
         &dev_attr_temp0.attr,
         &dev_attr_temp1.attr,
@@ -498,17 +566,12 @@ static inline void ads784x_hwmon_unregister(struct spi_device *spi,
 }
 #endif
 
-static int is_pen_down(struct device *dev)
-{
-        struct ads7846  *ts = dev_get_drvdata(dev);
-
-        return ts->pendown;
-}
-
 static ssize_t ads7846_pen_down_show(struct device *dev,
                                      struct device_attribute *attr, char *buf)
 {
-        return sprintf(buf, "%u\n", is_pen_down(dev));
+        struct ads7846 *ts = dev_get_drvdata(dev);
+
+        return sprintf(buf, "%u\n", ts->pendown);
 }
 
 static DEVICE_ATTR(pen_down, S_IRUGO, ads7846_pen_down_show, NULL);
@@ -516,7 +579,7 @@ static DEVICE_ATTR(pen_down, S_IRUGO, ads7846_pen_down_show, NULL);
 static ssize_t ads7846_disable_show(struct device *dev,
                                      struct device_attribute *attr, char *buf)
 {
-        struct ads7846  *ts = dev_get_drvdata(dev);
+        struct ads7846 *ts = dev_get_drvdata(dev);
 
         return sprintf(buf, "%u\n", ts->disabled);
 }
@@ -531,15 +594,11 @@ static ssize_t ads7846_disable_store(struct device *dev,
         if (strict_strtoul(buf, 10, &i))
                 return -EINVAL;
 
-        spin_lock_irq(&ts->lock);
-
         if (i)
                 ads7846_disable(ts);
         else
                 ads7846_enable(ts);
 
-        spin_unlock_irq(&ts->lock);
-
         return count;
 }
 
@@ -569,23 +628,141 @@ static void null_wait_for_sync(void)
 {
 }
 
-/*
- * PENIRQ only kicks the timer.  The timer only reissues the SPI transfer,
- * to retrieve touchscreen status.
- *
- * The SPI transfer completion callback does the real work.  It reports
- * touchscreen events and reactivates the timer (or IRQ) as appropriate.
- */
+static int ads7846_debounce_filter(void *ads, int data_idx, int *val)
+{
+        struct ads7846 *ts = ads;
+
+        if (!ts->read_cnt || (abs(ts->last_read - *val) > ts->debounce_tol)) {
+                /* Start over collecting consistent readings. */
+                ts->read_rep = 0;
+                /*
+                 * Repeat it, if this was the first read or the read
+                 * wasn't consistent enough.
+                 */
+                if (ts->read_cnt < ts->debounce_max) {
+                        ts->last_read = *val;
+                        ts->read_cnt++;
+                        return ADS7846_FILTER_REPEAT;
+                } else {
+                        /*
+                         * Maximum number of debouncing reached and still
+                         * not enough number of consistent readings. Abort
+                         * the whole sample, repeat it in the next sampling
+                         * period.
+                         */
+                        ts->read_cnt = 0;
+                        return ADS7846_FILTER_IGNORE;
+                }
+        } else {
+                if (++ts->read_rep > ts->debounce_rep) {
+                        /*
+                         * Got a good reading for this coordinate,
+                         * go for the next one.
+                         */
+                        ts->read_cnt = 0;
+                        ts->read_rep = 0;
+                        return ADS7846_FILTER_OK;
+                } else {
+                        /* Read more values that are consistent. */
+                        ts->read_cnt++;
+                        return ADS7846_FILTER_REPEAT;
+                }
+        }
+}
+
+static int ads7846_no_filter(void *ads, int data_idx, int *val)
+{
+        return ADS7846_FILTER_OK;
+}
+
+static int ads7846_get_value(struct ads7846 *ts, struct spi_message *m)
+{
+        struct spi_transfer *t =
+                list_entry(m->transfers.prev, struct spi_transfer, transfer_list);
+
+        if (ts->model == 7845) {
+                return be16_to_cpup((__be16 *)&(((char*)t->rx_buf)[1])) >> 3;
+        } else {
+                /*
+                 * adjust:  on-wire is a must-ignore bit, a BE12 value, then
+                 * padding; built from two 8 bit values written msb-first.
+                 */
+                return be16_to_cpup((__be16 *)t->rx_buf) >> 3;
+        }
+}
+
+static void ads7846_update_value(struct spi_message *m, int val)
+{
+        struct spi_transfer *t =
+                list_entry(m->transfers.prev, struct spi_transfer, transfer_list);
+
+        *(u16 *)t->rx_buf = val;
+}
+
+static void ads7846_read_state(struct ads7846 *ts)
+{
+        struct ads7846_packet *packet = ts->packet;
+        struct spi_message *m;
+        int msg_idx = 0;
+        int val;
+        int action;
+        int error;
+
+        while (msg_idx < ts->msg_count) {
+
+                ts->wait_for_sync();
+
+                m = &ts->msg[msg_idx];
+                error = spi_sync(ts->spi, m);
+                if (error) {
+                        dev_err(&ts->spi->dev, "spi_async --> %d\n", error);
+                        packet->tc.ignore = true;
+                        return;
+                }
+
+                /*
+                 * Last message is power down request, no need to convert
+                 * or filter the value.
+                 */
+                if (msg_idx < ts->msg_count - 1) {
 
-static void ads7846_rx(void *ads)
+                        val = ads7846_get_value(ts, m);
+
+                        action = ts->filter(ts->filter_data, msg_idx, &val);
+                        switch (action) {
+                        case ADS7846_FILTER_REPEAT:
+                                continue;
+
+                        case ADS7846_FILTER_IGNORE:
+                                packet->tc.ignore = true;
+                                msg_idx = ts->msg_count - 1;
+                                continue;
+
+                        case ADS7846_FILTER_OK:
+                                ads7846_update_value(m, val);
+                                packet->tc.ignore = false;
+                                msg_idx++;
+                                break;
+
+                        default:
+                                BUG();
+                        }
+                } else {
+                        msg_idx++;
+                }
+        }
+}
+
+static void ads7846_report_state(struct ads7846 *ts)
 {
-        struct ads7846          *ts = ads;
-        struct ads7846_packet   *packet = ts->packet;
-        unsigned                Rt;
-        u16                     x, y, z1, z2;
+        struct ads7846_packet *packet = ts->packet;
+        unsigned int Rt;
+        u16 x, y, z1, z2;
 
-        /* ads7846_rx_val() did in-place conversion (including byteswap) from
-         * on-the-wire format as part of debouncing to get stable readings.
+        /*
+         * ads7846_get_value() does in-place conversion (including byte swap)
+         * from on-the-wire format as part of debouncing to get stable
+         * readings.
          */
         if (ts->model == 7845) {
                 x = *(u16 *)packet->tc.x_buf;
@@ -623,19 +800,19 @@ static void ads7846_rx(void *ads)
                 Rt = 0;
         }
 
-        /* Sample found inconsistent by debouncing or pressure is beyond
+        /*
+         * Sample found inconsistent by debouncing or pressure is beyond
          * the maximum. Don't report it to user space, repeat at least
          * once more the measurement
          */
         if (packet->tc.ignore || Rt > ts->pressure_max) {
                 dev_vdbg(&ts->spi->dev, "ignored %d pressure %d\n",
                          packet->tc.ignore, Rt);
-                hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_PERIOD),
-                              HRTIMER_MODE_REL);
                 return;
         }
 
-        /* Maybe check the pendown state before reporting. This discards
+        /*
+         * Maybe check the pendown state before reporting. This discards
          * false readings when the pen is lifted.
          */
         if (ts->penirq_recheck_delay_usecs) {
@@ -644,8 +821,9 @@ static void ads7846_rx(void *ads)
                         Rt = 0;
         }
 
-        /* NOTE: We can't rely on the pressure to determine the pen down
-         * state, even this controller has a pressure sensor.  The pressure
+        /*
+         * NOTE: We can't rely on the pressure to determine the pen down
+         * state, even this controller has a pressure sensor. The pressure
          * value can fluctuate for quite a while after lifting the pen and
          * in some cases may not even settle at the expected value.
          *
@@ -655,15 +833,15 @@ static void ads7846_rx(void *ads)
         if (Rt) {
                 struct input_dev *input = ts->input;
 
+                if (ts->swap_xy)
+                        swap(x, y);
+
                 if (!ts->pendown) {
                         input_report_key(input, BTN_TOUCH, 1);
-                        ts->pendown = 1;
+                        ts->pendown = true;
                         dev_vdbg(&ts->spi->dev, "DOWN\n");
                 }
 
-                if (ts->swap_xy)
-                        swap(x, y);
-
                 input_report_abs(input, ABS_X, x);
                 input_report_abs(input, ABS_Y, y);
                 input_report_abs(input, ABS_PRESSURE, ts->pressure_max - Rt);
@@ -671,246 +849,94 @@ static void ads7846_rx(void *ads)
                 input_sync(input);
                 dev_vdbg(&ts->spi->dev, "%4d/%4d/%4d\n", x, y, Rt);
         }
-
-        hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_PERIOD),
-                        HRTIMER_MODE_REL);
-}
-
-static int ads7846_debounce(void *ads, int data_idx, int *val)
-{
-        struct ads7846          *ts = ads;
-
-        if (!ts->read_cnt || (abs(ts->last_read - *val) > ts->debounce_tol)) {
-                /* Start over collecting consistent readings. */
-                ts->read_rep = 0;
-                /* Repeat it, if this was the first read or the read
-                 * wasn't consistent enough. */
-                if (ts->read_cnt < ts->debounce_max) {
-                        ts->last_read = *val;
-                        ts->read_cnt++;
-                        return ADS7846_FILTER_REPEAT;
-                } else {
-                        /* Maximum number of debouncing reached and still
-                         * not enough number of consistent readings. Abort
-                         * the whole sample, repeat it in the next sampling
-                         * period.
-                         */
-                        ts->read_cnt = 0;
-                        return ADS7846_FILTER_IGNORE;
-                }
-        } else {
-                if (++ts->read_rep > ts->debounce_rep) {
-                        /* Got a good reading for this coordinate,
-                         * go for the next one. */
-                        ts->read_cnt = 0;
-                        ts->read_rep = 0;
-                        return ADS7846_FILTER_OK;
-                } else {
-                        /* Read more values that are consistent. */
-                        ts->read_cnt++;
-                        return ADS7846_FILTER_REPEAT;
-                }
-        }
 }
 
-static int ads7846_no_filter(void *ads, int data_idx, int *val)
+static irqreturn_t ads7846_hard_irq(int irq, void *handle)
 {
-        return ADS7846_FILTER_OK;
-}
-
-static void ads7846_rx_val(void *ads)
-{
-        struct ads7846 *ts = ads;
-        struct ads7846_packet *packet = ts->packet;
-        struct spi_message *m;
-        struct spi_transfer *t;
-        int val;
-        int action;
-        int status;
-
-        m = &ts->msg[ts->msg_idx];
-        t = list_entry(m->transfers.prev, struct spi_transfer, transfer_list);
-
-        if (ts->model == 7845) {
-                val = be16_to_cpup((__be16 *)&(((char*)t->rx_buf)[1])) >> 3;
-        } else {
-                /* adjust:  on-wire is a must-ignore bit, a BE12 value, then
-                 * padding; built from two 8 bit values written msb-first.
-                 */
-                val = be16_to_cpup((__be16 *)t->rx_buf) >> 3;
-        }
+        struct ads7846 *ts = handle;
 
-        action = ts->filter(ts->filter_data, ts->msg_idx, &val);
-        switch (action) {
-        case ADS7846_FILTER_REPEAT:
-                break;
-        case ADS7846_FILTER_IGNORE:
-                packet->tc.ignore = 1;
-                /* Last message will contain ads7846_rx() as the
-                 * completion function.
-                 */
-                m = ts->last_msg;
-                break;
-        case ADS7846_FILTER_OK:
-                *(u16 *)t->rx_buf = val;
-                packet->tc.ignore = 0;
-                m = &ts->msg[++ts->msg_idx];
-                break;
-        default:
-                BUG();
-        }
-        ts->wait_for_sync();
-        status = spi_async(ts->spi, m);
-        if (status)
-                dev_err(&ts->spi->dev, "spi_async --> %d\n",
-                                status);
+        return get_pendown_state(ts) ? IRQ_WAKE_THREAD : IRQ_HANDLED;
 }
 
-static enum hrtimer_restart ads7846_timer(struct hrtimer *handle)
-{
-        struct ads7846  *ts = container_of(handle, struct ads7846, timer);
-        int             status = 0;
-
-        spin_lock(&ts->lock);
-
-        if (unlikely(!get_pendown_state(ts) ||
-                     device_suspended(&ts->spi->dev))) {
-                if (ts->pendown) {
-                        struct input_dev *input = ts->input;
-
-                        input_report_key(input, BTN_TOUCH, 0);
-                        input_report_abs(input, ABS_PRESSURE, 0);
-                        input_sync(input);
-
-                        ts->pendown = 0;
-                        dev_vdbg(&ts->spi->dev, "UP\n");
-                }
-
-                /* measurement cycle ended */
-                if (!device_suspended(&ts->spi->dev)) {
-                        ts->irq_disabled = 0;
-                        enable_irq(ts->spi->irq);
-                }
-                ts->pending = 0;
-        } else {
-                /* pen is still down, continue with the measurement */
-                ts->msg_idx = 0;
-                ts->wait_for_sync();
-                status = spi_async(ts->spi, &ts->msg[0]);
-                if (status)
-                        dev_err(&ts->spi->dev, "spi_async --> %d\n", status);
-        }
-
-        spin_unlock(&ts->lock);
-        return HRTIMER_NORESTART;
-}
 
 static irqreturn_t ads7846_irq(int irq, void *handle)
 {
         struct ads7846 *ts = handle;
-        unsigned long flags;
-
-        spin_lock_irqsave(&ts->lock, flags);
-        if (likely(get_pendown_state(ts))) {
-                if (!ts->irq_disabled) {
-                        /* The ARM do_simple_IRQ() dispatcher doesn't act
-                         * like the other dispatchers:  it will report IRQs
-                         * even after they've been disabled.  We work around
-                         * that here.  (The "generic irq" framework may help...)
-                         */
-                        ts->irq_disabled = 1;
-                        disable_irq_nosync(ts->spi->irq);
-                        ts->pending = 1;
-                        hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_DELAY),
-                                        HRTIMER_MODE_REL);
-                }
-        }
-        spin_unlock_irqrestore(&ts->lock, flags);
 
-        return IRQ_HANDLED;
-}
+        /* Start with a small delay before checking pendown state */
+        msleep(TS_POLL_DELAY);
 
-/*--------------------------------------------------------------------------*/
+        while (!ts->stopped && get_pendown_state(ts)) {
 
-/* Must be called with ts->lock held */
-static void ads7846_disable(struct ads7846 *ts)
-{
-        if (ts->disabled)
-                return;
+                /* pen is down, continue with the measurement */
+                ads7846_read_state(ts);
 
-        ts->disabled = 1;
+                if (!ts->stopped)
+                        ads7846_report_state(ts);
 
-        /* are we waiting for IRQ, or polling? */
-        if (!ts->pending) {
-                ts->irq_disabled = 1;
-                disable_irq(ts->spi->irq);
-        } else {
-                /* the timer will run at least once more, and
-                 * leave everything in a clean state, IRQ disabled
-                 */
-                while (ts->pending) {
-                        spin_unlock_irq(&ts->lock);
-                        msleep(1);
-                        spin_lock_irq(&ts->lock);
-                }
+                wait_event_timeout(ts->wait, ts->stopped,
+                                   msecs_to_jiffies(TS_POLL_PERIOD));
         }
 
-        regulator_disable(ts->reg);
-
-        /* we know the chip's in lowpower mode since we always
-         * leave it that way after every request
-         */
-}
+        if (ts->pendown) {
+                struct input_dev *input = ts->input;
 
-/* Must be called with ts->lock held */
-static void ads7846_enable(struct ads7846 *ts)
-{
-        if (!ts->disabled)
-                return;
+                input_report_key(input, BTN_TOUCH, 0);
+                input_report_abs(input, ABS_PRESSURE, 0);
+                input_sync(input);
 
-        regulator_enable(ts->reg);
+                ts->pendown = false;
+                dev_vdbg(&ts->spi->dev, "UP\n");
+        }
 
-        ts->disabled = 0;
-        ts->irq_disabled = 0;
-        enable_irq(ts->spi->irq);
+        return IRQ_HANDLED;
 }
 
 static int ads7846_suspend(struct spi_device *spi, pm_message_t message)
 {
         struct ads7846 *ts = dev_get_drvdata(&spi->dev);
 
-        spin_lock_irq(&ts->lock);
+        mutex_lock(&ts->lock);
 
-        ts->is_suspended = 1;
-        ads7846_disable(ts);
+        if (!ts->suspended) {
 
-        spin_unlock_irq(&ts->lock);
+                if (!ts->disabled)
+                        __ads7846_disable(ts);
 
-        if (device_may_wakeup(&ts->spi->dev))
-                enable_irq_wake(ts->spi->irq);
+                if (device_may_wakeup(&ts->spi->dev))
+                        enable_irq_wake(ts->spi->irq);
 
-        return 0;
+                ts->suspended = true;
+        }
+
+        mutex_unlock(&ts->lock);
 
+        return 0;
 }
 
 static int ads7846_resume(struct spi_device *spi)
 {
         struct ads7846 *ts = dev_get_drvdata(&spi->dev);
 
-        if (device_may_wakeup(&ts->spi->dev))
-                disable_irq_wake(ts->spi->irq);
+        mutex_lock(&ts->lock);
+
+        if (ts->suspended) {
 
-        spin_lock_irq(&ts->lock);
+                ts->suspended = false;
 
-        ts->is_suspended = 0;
-        ads7846_enable(ts);
+                if (device_may_wakeup(&ts->spi->dev))
+                        disable_irq_wake(ts->spi->irq);
 
-        spin_unlock_irq(&ts->lock);
+                if (!ts->disabled)
+                        __ads7846_enable(ts);
+        }
+
+        mutex_unlock(&ts->lock);
 
         return 0;
 }
 
-static int __devinit setup_pendown(struct spi_device *spi, struct ads7846 *ts)
+static int __devinit ads7846_setup_pendown(struct spi_device *spi, struct ads7846 *ts)
 {
         struct ads7846_platform_data *pdata = spi->dev.platform_data;
         int err;
@@ -932,146 +958,40 @@ static int __devinit setup_pendown(struct spi_device *spi, struct ads7846 *ts)
         err = gpio_request(pdata->gpio_pendown, "ads7846_pendown");
         if (err) {
                 dev_err(&spi->dev, "failed to request pendown GPIO%d\n",
-                                pdata->gpio_pendown);
+                        pdata->gpio_pendown);
                 return err;
         }
 
         ts->gpio_pendown = pdata->gpio_pendown;
+
         return 0;
 }
 
-static int __devinit ads7846_probe(struct spi_device *spi)
+/*
+ * Set up the transfers to read touchscreen state; this assumes we
+ * use formula #2 for pressure, not #3.
+ */
+static void __devinit ads7846_setup_spi_msg(struct ads7846 *ts,
+                                const struct ads7846_platform_data *pdata)
 {
-        struct ads7846 *ts;
-        struct ads7846_packet *packet;
-        struct input_dev *input_dev;
-        const struct ads7846_platform_data *pdata = spi->dev.platform_data;
-        struct spi_message *m;
-        struct spi_transfer *x;
-        unsigned long irq_flags;
-        int vref;
-        int err;
-
-        if (!spi->irq) {
-                dev_dbg(&spi->dev, "no IRQ?\n");
-                return -ENODEV;
-        }
-
-        if (!pdata) {
-                dev_dbg(&spi->dev, "no platform data?\n");
-                return -ENODEV;
-        }
-
-        /* don't exceed max specified sample rate */
-        if (spi->max_speed_hz > (125000 * SAMPLE_BITS)) {
-                dev_dbg(&spi->dev, "f(sample) %d KHz?\n",
-                                (spi->max_speed_hz/SAMPLE_BITS)/1000);
-                return -EINVAL;
-        }
-
-        /* We'd set TX wordsize 8 bits and RX wordsize to 13 bits ... except
-         * that even if the hardware can do that, the SPI controller driver
-         * may not.  So we stick to very-portable 8 bit words, both RX and TX.
-         */
-        spi->bits_per_word = 8;
-        spi->mode = SPI_MODE_0;
-        err = spi_setup(spi);
-        if (err < 0)
-                return err;
-
-        ts = kzalloc(sizeof(struct ads7846), GFP_KERNEL);
-        packet = kzalloc(sizeof(struct ads7846_packet), GFP_KERNEL);
-        input_dev = input_allocate_device();
-        if (!ts || !packet || !input_dev) {
-                err = -ENOMEM;
-                goto err_free_mem;
-        }
-
-        dev_set_drvdata(&spi->dev, ts);
-
-        ts->packet = packet;
-        ts->spi = spi;
-        ts->input = input_dev;
-        ts->vref_mv = pdata->vref_mv;
-        ts->swap_xy = pdata->swap_xy;
-
-        hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
-        ts->timer.function = ads7846_timer;
-
-        spin_lock_init(&ts->lock);
-
-        ts->model = pdata->model ? : 7846;
-        ts->vref_delay_usecs = pdata->vref_delay_usecs ? : 100;
-        ts->x_plate_ohms = pdata->x_plate_ohms ? : 400;
-        ts->pressure_max = pdata->pressure_max ? : ~0;
-
-        if (pdata->filter != NULL) {
-                if (pdata->filter_init != NULL) {
-                        err = pdata->filter_init(pdata, &ts->filter_data);
-                        if (err < 0)
-                                goto err_free_mem;
-                }
-                ts->filter = pdata->filter;
-                ts->filter_cleanup = pdata->filter_cleanup;
-        } else if (pdata->debounce_max) {
-                ts->debounce_max = pdata->debounce_max;
-                if (ts->debounce_max < 2)
-                        ts->debounce_max = 2;
-                ts->debounce_tol = pdata->debounce_tol;
-                ts->debounce_rep = pdata->debounce_rep;
-                ts->filter = ads7846_debounce;
-                ts->filter_data = ts;
-        } else
-                ts->filter = ads7846_no_filter;
-
-        err = setup_pendown(spi, ts);
-        if (err)
-                goto err_cleanup_filter;
-
-        if (pdata->penirq_recheck_delay_usecs)
-                ts->penirq_recheck_delay_usecs =
-                                pdata->penirq_recheck_delay_usecs;
-
-        ts->wait_for_sync = pdata->wait_for_sync ? : null_wait_for_sync;
-
-        snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&spi->dev));
-        snprintf(ts->name, sizeof(ts->name), "ADS%d Touchscreen", ts->model);
-
-        input_dev->name = ts->name;
-        input_dev->phys = ts->phys;
-        input_dev->dev.parent = &spi->dev;
-
-        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
-        input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
-        input_set_abs_params(input_dev, ABS_X,
-                        pdata->x_min ? : 0,
-                        pdata->x_max ? : MAX_12BIT,
-                        0, 0);
-        input_set_abs_params(input_dev, ABS_Y,
-                        pdata->y_min ? : 0,
-                        pdata->y_max ? : MAX_12BIT,
-                        0, 0);
-        input_set_abs_params(input_dev, ABS_PRESSURE,
-                        pdata->pressure_min, pdata->pressure_max, 0, 0);
-
-        vref = pdata->keep_vref_on;
+        struct spi_message *m = &ts->msg[0];
+        struct spi_transfer *x = ts->xfer;
+        struct ads7846_packet *packet = ts->packet;
+        int vref = pdata->keep_vref_on;
 
         if (ts->model == 7873) {
-                /* The AD7873 is almost identical to the ADS7846
+                /*
+                 * The AD7873 is almost identical to the ADS7846
                  * keep VREF off during differential/ratiometric
-                 * conversion modes
+                 * conversion modes.
                  */
                 ts->model = 7846;
                 vref = 0;
         }
 
-        /* set up the transfers to read touchscreen state; this assumes we
-         * use formula #2 for pressure, not #3.
-         */
-        m = &ts->msg[0];
-        x = ts->xfer;
-
+        ts->msg_count = 1;
         spi_message_init(m);
+        m->context = ts;
 
         if (ts->model == 7845) {
                 packet->read_y_cmd[0] = READ_Y(vref);
@@ -1094,7 +1014,8 @@ static int __devinit ads7846_probe(struct spi_device *spi)
                 spi_message_add_tail(x, m);
         }
 
-        /* the first sample after switching drivers can be low quality;
+        /*
+         * The first sample after switching drivers can be low quality;
          * optionally discard it, using a second one after the signals
          * have had enough time to stabilize.
          */
@@ -1112,11 +1033,10 @@ static int __devinit ads7846_probe(struct spi_device *spi)
                 spi_message_add_tail(x, m);
         }
 
-        m->complete = ads7846_rx_val;
-        m->context = ts;
-
+        ts->msg_count++;
         m++;
         spi_message_init(m);
+        m->context = ts;
 
         if (ts->model == 7845) {
                 x++;
@@ -1156,13 +1076,12 @@ static int __devinit ads7846_probe(struct spi_device *spi)
                 spi_message_add_tail(x, m);
         }
 
-        m->complete = ads7846_rx_val;
-        m->context = ts;
-
         /* turn y+ off, x- on; we'll use formula #2 */
         if (ts->model == 7846) {
+                ts->msg_count++;
                 m++;
                 spi_message_init(m);
+                m->context = ts;
 
                 x++;
                 packet->read_z1 = READ_Z1(vref);
@@ -1190,11 +1109,10 @@ static int __devinit ads7846_probe(struct spi_device *spi)
                         spi_message_add_tail(x, m);
                 }
 
-                m->complete = ads7846_rx_val;
-                m->context = ts;
-
+                ts->msg_count++;
                 m++;
                 spi_message_init(m);
+                m->context = ts;
 
                 x++;
                 packet->read_z2 = READ_Z2(vref);
@@ -1221,14 +1139,13 @@ static int __devinit ads7846_probe(struct spi_device *spi)
                         x->len = 2;
                         spi_message_add_tail(x, m);
                 }
-
-                m->complete = ads7846_rx_val;
-                m->context = ts;
         }
 
         /* power down */
+        ts->msg_count++;
         m++;
         spi_message_init(m);
+        m->context = ts;
 
         if (ts->model == 7845) {
                 x++;
@@ -1251,11 +1168,119 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 
         CS_CHANGE(*x);
         spi_message_add_tail(x, m);
+}
 
-        m->complete = ads7846_rx;
-        m->context = ts;
+static int __devinit ads7846_probe(struct spi_device *spi)
+{
+        struct ads7846 *ts;
+        struct ads7846_packet *packet;
+        struct input_dev *input_dev;
+        struct ads7846_platform_data *pdata = spi->dev.platform_data;
+        unsigned long irq_flags;
+        int err;
+
+        if (!spi->irq) {
+                dev_dbg(&spi->dev, "no IRQ?\n");
+                return -ENODEV;
+        }
+
+        if (!pdata) {
+                dev_dbg(&spi->dev, "no platform data?\n");
+                return -ENODEV;
+        }
+
+        /* don't exceed max specified sample rate */
+        if (spi->max_speed_hz > (125000 * SAMPLE_BITS)) {
+                dev_dbg(&spi->dev, "f(sample) %d KHz?\n",
+                                (spi->max_speed_hz/SAMPLE_BITS)/1000);
+                return -EINVAL;
+        }
+
+        /* We'd set TX word size 8 bits and RX word size to 13 bits ... except
+         * that even if the hardware can do that, the SPI controller driver
+         * may not.  So we stick to very-portable 8 bit words, both RX and TX.
+         */
+        spi->bits_per_word = 8;
+        spi->mode = SPI_MODE_0;
+        err = spi_setup(spi);
+        if (err < 0)
+                return err;
 
-        ts->last_msg = m;
+        ts = kzalloc(sizeof(struct ads7846), GFP_KERNEL);
+        packet = kzalloc(sizeof(struct ads7846_packet), GFP_KERNEL);
+        input_dev = input_allocate_device();
+        if (!ts || !packet || !input_dev) {
+                err = -ENOMEM;
+                goto err_free_mem;
+        }
+
+        dev_set_drvdata(&spi->dev, ts);
+
+        ts->packet = packet;
+        ts->spi = spi;
+        ts->input = input_dev;
+        ts->vref_mv = pdata->vref_mv;
+        ts->swap_xy = pdata->swap_xy;
+
+        mutex_init(&ts->lock);
+        init_waitqueue_head(&ts->wait);
+
+        ts->model = pdata->model ? : 7846;
+        ts->vref_delay_usecs = pdata->vref_delay_usecs ? : 100;
+        ts->x_plate_ohms = pdata->x_plate_ohms ? : 400;
+        ts->pressure_max = pdata->pressure_max ? : ~0;
+
+        if (pdata->filter != NULL) {
+                if (pdata->filter_init != NULL) {
+                        err = pdata->filter_init(pdata, &ts->filter_data);
+                        if (err < 0)
+                                goto err_free_mem;
+                }
+                ts->filter = pdata->filter;
+                ts->filter_cleanup = pdata->filter_cleanup;
+        } else if (pdata->debounce_max) {
+                ts->debounce_max = pdata->debounce_max;
+                if (ts->debounce_max < 2)
+                        ts->debounce_max = 2;
+                ts->debounce_tol = pdata->debounce_tol;
+                ts->debounce_rep = pdata->debounce_rep;
+                ts->filter = ads7846_debounce_filter;
+                ts->filter_data = ts;
+        } else {
+                ts->filter = ads7846_no_filter;
+        }
+
+        err = ads7846_setup_pendown(spi, ts);
+        if (err)
+                goto err_cleanup_filter;
+
+        if (pdata->penirq_recheck_delay_usecs)
+                ts->penirq_recheck_delay_usecs =
+                                pdata->penirq_recheck_delay_usecs;
+
+        ts->wait_for_sync = pdata->wait_for_sync ? : null_wait_for_sync;
+
+        snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&spi->dev));
+        snprintf(ts->name, sizeof(ts->name), "ADS%d Touchscreen", ts->model);
+
+        input_dev->name = ts->name;
+        input_dev->phys = ts->phys;
+        input_dev->dev.parent = &spi->dev;
+
+        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+        input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+        input_set_abs_params(input_dev, ABS_X,
+                        pdata->x_min ? : 0,
+                        pdata->x_max ? : MAX_12BIT,
+                        0, 0);
+        input_set_abs_params(input_dev, ABS_Y,
+                        pdata->y_min ? : 0,
+                        pdata->y_max ? : MAX_12BIT,
+                        0, 0);
+        input_set_abs_params(input_dev, ABS_PRESSURE,
+                        pdata->pressure_min, pdata->pressure_max, 0, 0);
+
+        ads7846_setup_spi_msg(ts, pdata);
 
         ts->reg = regulator_get(&spi->dev, "vcc");
         if (IS_ERR(ts->reg)) {
@@ -1271,16 +1296,17 @@ static int __devinit ads7846_probe(struct spi_device *spi)
         }
 
         irq_flags = pdata->irq_flags ? : IRQF_TRIGGER_FALLING;
+        irq_flags |= IRQF_ONESHOT;
 
-        err = request_irq(spi->irq, ads7846_irq, irq_flags,
-                          spi->dev.driver->name, ts);
-
+        err = request_threaded_irq(spi->irq, ads7846_hard_irq, ads7846_irq,
+                                   irq_flags, spi->dev.driver->name, ts);
         if (err && !pdata->irq_flags) {
                 dev_info(&spi->dev,
                         "trying pin change workaround on irq %d\n", spi->irq);
-                err = request_irq(spi->irq, ads7846_irq,
-                                  IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
-                                  spi->dev.driver->name, ts);
+                irq_flags |= IRQF_TRIGGER_RISING;
+                err = request_threaded_irq(spi->irq,
+                                  ads7846_hard_irq, ads7846_irq,
+                                  irq_flags, spi->dev.driver->name, ts);
         }
 
         if (err) {
@@ -1294,7 +1320,8 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 
         dev_info(&spi->dev, "touchscreen, irq %d\n", spi->irq);
 
-        /* take a first sample, leaving nPENIRQ active and vREF off; avoid
+        /*
+         * Take a first sample, leaving nPENIRQ active and vREF off; avoid
          * the touchscreen, in case it's not connected.
          */
         if (ts->model == 7845)
@@ -1340,20 +1367,18 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 
 static int __devexit ads7846_remove(struct spi_device *spi)
 {
-        struct ads7846          *ts = dev_get_drvdata(&spi->dev);
+        struct ads7846 *ts = dev_get_drvdata(&spi->dev);
 
         device_init_wakeup(&spi->dev, false);
 
-        ads784x_hwmon_unregister(spi, ts);
-        input_unregister_device(ts->input);
-
-        ads7846_suspend(spi, PMSG_SUSPEND);
-
         sysfs_remove_group(&spi->dev.kobj, &ads784x_attr_group);
 
+        ads7846_disable(ts);
         free_irq(ts->spi->irq, ts);
-        /* suspend left the IRQ disabled */
-        enable_irq(ts->spi->irq);
+
+        input_unregister_device(ts->input);
+
+        ads784x_hwmon_unregister(spi, ts);
 
         regulator_disable(ts->reg);
         regulator_put(ts->reg);
@@ -1368,6 +1393,7 @@ static int __devexit ads7846_remove(struct spi_device *spi)
         kfree(ts);
 
         dev_dbg(&spi->dev, "unregistered touchscreen\n");
+
         return 0;
 }
 
diff --git a/drivers/input/touchscreen/bu21013_ts.c b/drivers/input/touchscreen/bu21013_ts.c
new file mode 100644
index 000000000000..ccde58602563
--- /dev/null
+++ b/drivers/input/touchscreen/bu21013_ts.c
@@ -0,0 +1,648 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ * Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson
+ * License terms:GNU General Public License (GPL) version 2
+ */
+
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/workqueue.h>
+#include <linux/input.h>
+#include <linux/input/bu21013.h>
+#include <linux/slab.h>
+
+#define PEN_DOWN_INTR   0
+#define MAX_FINGERS     2
+#define RESET_DELAY     30
+#define PENUP_TIMEOUT   (10)
+#define DELTA_MIN       16
+#define MASK_BITS       0x03
+#define SHIFT_8         8
+#define SHIFT_2         2
+#define LENGTH_OF_BUFFER        11
+#define I2C_RETRY_COUNT 5
+
+#define BU21013_SENSORS_BTN_0_7_REG     0x70
+#define BU21013_SENSORS_BTN_8_15_REG    0x71
+#define BU21013_SENSORS_BTN_16_23_REG   0x72
+#define BU21013_X1_POS_MSB_REG          0x73
+#define BU21013_X1_POS_LSB_REG          0x74
+#define BU21013_Y1_POS_MSB_REG          0x75
+#define BU21013_Y1_POS_LSB_REG          0x76
+#define BU21013_X2_POS_MSB_REG          0x77
+#define BU21013_X2_POS_LSB_REG          0x78
+#define BU21013_Y2_POS_MSB_REG          0x79
+#define BU21013_Y2_POS_LSB_REG          0x7A
+#define BU21013_INT_CLR_REG             0xE8
+#define BU21013_INT_MODE_REG            0xE9
+#define BU21013_GAIN_REG                0xEA
+#define BU21013_OFFSET_MODE_REG         0xEB
+#define BU21013_XY_EDGE_REG             0xEC
+#define BU21013_RESET_REG               0xED
+#define BU21013_CALIB_REG               0xEE
+#define BU21013_DONE_REG                0xEF
+#define BU21013_SENSOR_0_7_REG          0xF0
+#define BU21013_SENSOR_8_15_REG         0xF1
+#define BU21013_SENSOR_16_23_REG        0xF2
+#define BU21013_POS_MODE1_REG           0xF3
+#define BU21013_POS_MODE2_REG           0xF4
+#define BU21013_CLK_MODE_REG            0xF5
+#define BU21013_IDLE_REG                0xFA
+#define BU21013_FILTER_REG              0xFB
+#define BU21013_TH_ON_REG               0xFC
+#define BU21013_TH_OFF_REG              0xFD
+
+
+#define BU21013_RESET_ENABLE            0x01
+
+#define BU21013_SENSORS_EN_0_7          0x3F
+#define BU21013_SENSORS_EN_8_15         0xFC
+#define BU21013_SENSORS_EN_16_23        0x1F
+
+#define BU21013_POS_MODE1_0             0x02
+#define BU21013_POS_MODE1_1             0x04
+#define BU21013_POS_MODE1_2             0x08
+
+#define BU21013_POS_MODE2_ZERO          0x01
+#define BU21013_POS_MODE2_AVG1          0x02
+#define BU21013_POS_MODE2_AVG2          0x04
+#define BU21013_POS_MODE2_EN_XY         0x08
+#define BU21013_POS_MODE2_EN_RAW        0x10
+#define BU21013_POS_MODE2_MULTI         0x80
+
+#define BU21013_CLK_MODE_DIV            0x01
+#define BU21013_CLK_MODE_EXT            0x02
+#define BU21013_CLK_MODE_CALIB          0x80
+
+#define BU21013_IDLET_0                 0x01
+#define BU21013_IDLET_1                 0x02
+#define BU21013_IDLET_2                 0x04
+#define BU21013_IDLET_3                 0x08
+#define BU21013_IDLE_INTERMIT_EN        0x10
+
+#define BU21013_DELTA_0_6       0x7F
+#define BU21013_FILTER_EN       0x80
+
+#define BU21013_INT_MODE_LEVEL  0x00
+#define BU21013_INT_MODE_EDGE   0x01
+
+#define BU21013_GAIN_0          0x01
+#define BU21013_GAIN_1          0x02
+#define BU21013_GAIN_2          0x04
+
+#define BU21013_OFFSET_MODE_DEFAULT     0x00
+#define BU21013_OFFSET_MODE_MOVE        0x01
+#define BU21013_OFFSET_MODE_DISABLE     0x02
+
+#define BU21013_TH_ON_0         0x01
+#define BU21013_TH_ON_1         0x02
+#define BU21013_TH_ON_2         0x04
+#define BU21013_TH_ON_3         0x08
+#define BU21013_TH_ON_4         0x10
+#define BU21013_TH_ON_5         0x20
+#define BU21013_TH_ON_6         0x40
+#define BU21013_TH_ON_7         0x80
+#define BU21013_TH_ON_MAX       0xFF
+
+#define BU21013_TH_OFF_0        0x01
+#define BU21013_TH_OFF_1        0x02
+#define BU21013_TH_OFF_2        0x04
+#define BU21013_TH_OFF_3        0x08
+#define BU21013_TH_OFF_4        0x10
+#define BU21013_TH_OFF_5        0x20
+#define BU21013_TH_OFF_6        0x40
+#define BU21013_TH_OFF_7        0x80
+#define BU21013_TH_OFF_MAX      0xFF
+
+#define BU21013_X_EDGE_0        0x01
+#define BU21013_X_EDGE_1        0x02
+#define BU21013_X_EDGE_2        0x04
+#define BU21013_X_EDGE_3        0x08
+#define BU21013_Y_EDGE_0        0x10
+#define BU21013_Y_EDGE_1        0x20
+#define BU21013_Y_EDGE_2        0x40
+#define BU21013_Y_EDGE_3        0x80
+
+#define BU21013_DONE    0x01
+#define BU21013_NUMBER_OF_X_SENSORS     (6)
+#define BU21013_NUMBER_OF_Y_SENSORS     (11)
+
+#define DRIVER_TP       "bu21013_tp"
+
+/**
+ * struct bu21013_ts_data - touch panel data structure
+ * @client: pointer to the i2c client
+ * @wait: variable to wait_queue_head_t structure
+ * @touch_stopped: touch stop flag
+ * @chip: pointer to the touch panel controller
+ * @in_dev: pointer to the input device structure
+ * @intr_pin: interrupt pin value
+ *
+ * Touch panel device data structure
+ */
+struct bu21013_ts_data {
+        struct i2c_client *client;
+        wait_queue_head_t wait;
+        bool touch_stopped;
+        const struct bu21013_platform_device *chip;
+        struct input_dev *in_dev;
+        unsigned int intr_pin;
+};
+
+/**
+ * bu21013_read_block_data(): read the touch co-ordinates
+ * @data: bu21013_ts_data structure pointer
+ * @buf: byte pointer
+ *
+ * Read the touch co-ordinates using i2c read block into buffer
+ * and returns integer.
+ */
+static int bu21013_read_block_data(struct bu21013_ts_data *data, u8 *buf)
+{
+        int ret, i;
+
+        for (i = 0; i < I2C_RETRY_COUNT; i++) {
+                ret = i2c_smbus_read_i2c_block_data
+                        (data->client, BU21013_SENSORS_BTN_0_7_REG,
+                                LENGTH_OF_BUFFER, buf);
+                if (ret == LENGTH_OF_BUFFER)
+                        return 0;
+        }
+        return -EINVAL;
+}
+
+/**
+ * bu21013_do_touch_report(): Get the touch co-ordinates
+ * @data: bu21013_ts_data structure pointer
+ *
+ * Get the touch co-ordinates from touch sensor registers and writes
+ * into device structure and returns integer.
+ */
+static int bu21013_do_touch_report(struct bu21013_ts_data *data)
+{
+        u8      buf[LENGTH_OF_BUFFER];
+        unsigned int pos_x[2], pos_y[2];
+        bool    has_x_sensors, has_y_sensors;
+        int     finger_down_count = 0;
+        int     i;
+
+        if (data == NULL)
+                return -EINVAL;
+
+        if (bu21013_read_block_data(data, buf) < 0)
+                return -EINVAL;
+
+        has_x_sensors = hweight32(buf[0] & BU21013_SENSORS_EN_0_7);
+        has_y_sensors = hweight32(((buf[1] & BU21013_SENSORS_EN_8_15) |
+                ((buf[2] & BU21013_SENSORS_EN_16_23) << SHIFT_8)) >> SHIFT_2);
+        if (!has_x_sensors || !has_y_sensors)
+                return 0;
+
+        for (i = 0; i < MAX_FINGERS; i++) {
+                const u8 *p = &buf[4 * i + 3];
+                unsigned int x = p[0] << SHIFT_2 | (p[1] & MASK_BITS);
+                unsigned int y = p[2] << SHIFT_2 | (p[3] & MASK_BITS);
+                if (x == 0 || y == 0)
+                        continue;
+                pos_x[finger_down_count] = x;
+                pos_y[finger_down_count] = y;
+                finger_down_count++;
+        }
+
+        if (finger_down_count) {
+                if (finger_down_count == 2 &&
+                    (abs(pos_x[0] - pos_x[1]) < DELTA_MIN ||
+                     abs(pos_y[0] - pos_y[1]) < DELTA_MIN)) {
+                        return 0;
+                }
+
+                for (i = 0; i < finger_down_count; i++) {
+                        if (data->chip->x_flip)
+                                pos_x[i] = data->chip->touch_x_max - pos_x[i];
+                        if (data->chip->y_flip)
+                                pos_y[i] = data->chip->touch_y_max - pos_y[i];
+
+                        input_report_abs(data->in_dev,
+                                         ABS_MT_POSITION_X, pos_x[i]);
+                        input_report_abs(data->in_dev,
+                                         ABS_MT_POSITION_Y, pos_y[i]);
+                        input_mt_sync(data->in_dev);
+                }
+        } else
+                input_mt_sync(data->in_dev);
+
+        input_sync(data->in_dev);
+
+        return 0;
+}
+/**
+ * bu21013_gpio_irq() - gpio thread function for touch interrupt
+ * @irq: irq value
+ * @device_data: void pointer
+ *
+ * This gpio thread function for touch interrupt
+ * and returns irqreturn_t.
+ */
+static irqreturn_t bu21013_gpio_irq(int irq, void *device_data)
+{
+        struct bu21013_ts_data *data = device_data;
+        struct i2c_client *i2c = data->client;
+        int retval;
+
+        do {
+                retval = bu21013_do_touch_report(data);
+                if (retval < 0) {
+                        dev_err(&i2c->dev, "bu21013_do_touch_report failed\n");
+                        return IRQ_NONE;
+                }
+
+                data->intr_pin = data->chip->irq_read_val();
+                if (data->intr_pin == PEN_DOWN_INTR)
+                        wait_event_timeout(data->wait, data->touch_stopped,
+                                           msecs_to_jiffies(2));
+        } while (!data->intr_pin && !data->touch_stopped);
+
+        return IRQ_HANDLED;
+}
+
+/**
+ * bu21013_init_chip() - power on sequence for the bu21013 controller
+ * @data: device structure pointer
+ *
+ * This function is used to power on
+ * the bu21013 controller and returns integer.
+ */
+static int bu21013_init_chip(struct bu21013_ts_data *data)
+{
+        int retval;
+        struct i2c_client *i2c = data->client;
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_RESET_REG,
+                                        BU21013_RESET_ENABLE);
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_RESET reg write failed\n");
+                return retval;
+        }
+        msleep(RESET_DELAY);
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_0_7_REG,
+                                        BU21013_SENSORS_EN_0_7);
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_SENSOR_0_7 reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_8_15_REG,
+                                                BU21013_SENSORS_EN_8_15);
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_SENSOR_8_15 reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_16_23_REG,
+                                                BU21013_SENSORS_EN_16_23);
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_SENSOR_16_23 reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_POS_MODE1_REG,
+                                (BU21013_POS_MODE1_0 | BU21013_POS_MODE1_1));
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_POS_MODE1 reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_POS_MODE2_REG,
+                        (BU21013_POS_MODE2_ZERO | BU21013_POS_MODE2_AVG1 |
+                        BU21013_POS_MODE2_AVG2 | BU21013_POS_MODE2_EN_RAW |
+                        BU21013_POS_MODE2_MULTI));
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_POS_MODE2 reg write failed\n");
+                return retval;
+        }
+
+        if (data->chip->ext_clk)
+                retval = i2c_smbus_write_byte_data(i2c, BU21013_CLK_MODE_REG,
+                        (BU21013_CLK_MODE_EXT | BU21013_CLK_MODE_CALIB));
+        else
+                retval = i2c_smbus_write_byte_data(i2c, BU21013_CLK_MODE_REG,
+                        (BU21013_CLK_MODE_DIV | BU21013_CLK_MODE_CALIB));
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_CLK_MODE reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_IDLE_REG,
+                                (BU21013_IDLET_0 | BU21013_IDLE_INTERMIT_EN));
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_IDLE reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_INT_MODE_REG,
+                                                BU21013_INT_MODE_LEVEL);
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_INT_MODE reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_FILTER_REG,
+                                                (BU21013_DELTA_0_6 |
+                                                        BU21013_FILTER_EN));
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_FILTER reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_TH_ON_REG,
+                                        BU21013_TH_ON_5);
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_TH_ON reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_TH_OFF_REG,
+                                BU21013_TH_OFF_4 || BU21013_TH_OFF_3);
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_TH_OFF reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_GAIN_REG,
+                                        (BU21013_GAIN_0 | BU21013_GAIN_1));
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_GAIN reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_OFFSET_MODE_REG,
+                                        BU21013_OFFSET_MODE_DEFAULT);
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_OFFSET_MODE reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_XY_EDGE_REG,
+                                (BU21013_X_EDGE_0 | BU21013_X_EDGE_2 |
+                                BU21013_Y_EDGE_1 | BU21013_Y_EDGE_3));
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_XY_EDGE reg write failed\n");
+                return retval;
+        }
+
+        retval = i2c_smbus_write_byte_data(i2c, BU21013_DONE_REG,
+                                                        BU21013_DONE);
+        if (retval < 0) {
+                dev_err(&i2c->dev, "BU21013_REG_DONE reg write failed\n");
+                return retval;
+        }
+
+        return 0;
+}
+
+/**
+ * bu21013_free_irq() - frees IRQ registered for touchscreen
+ * @bu21013_data: device structure pointer
+ *
+ * This function signals interrupt thread to stop processing and
+ * frees interrupt.
+ */
+static void bu21013_free_irq(struct bu21013_ts_data *bu21013_data)
+{
+        bu21013_data->touch_stopped = true;
+        wake_up(&bu21013_data->wait);
+        free_irq(bu21013_data->chip->irq, bu21013_data);
+}
+
+/**
+ * bu21013_probe() - initializes the i2c-client touchscreen driver
+ * @client: i2c client structure pointer
+ * @id: i2c device id pointer
+ *
+ * This function used to initializes the i2c-client touchscreen
+ * driver and returns integer.
+ */
+static int __devinit bu21013_probe(struct i2c_client *client,
+                                        const struct i2c_device_id *id)
+{
+        struct bu21013_ts_data *bu21013_data;
+        struct input_dev *in_dev;
+        const struct bu21013_platform_device *pdata =
+                                        client->dev.platform_data;
+        int error;
+
+        if (!i2c_check_functionality(client->adapter,
+                                        I2C_FUNC_SMBUS_BYTE_DATA)) {
+                dev_err(&client->dev, "i2c smbus byte data not supported\n");
+                return -EIO;
+        }
+
+        if (!pdata) {
+                dev_err(&client->dev, "platform data not defined\n");
+                return -EINVAL;
+        }
+
+        bu21013_data = kzalloc(sizeof(struct bu21013_ts_data), GFP_KERNEL);
+        in_dev = input_allocate_device();
+        if (!bu21013_data || !in_dev) {
+                dev_err(&client->dev, "device memory alloc failed\n");
+                error = -ENOMEM;
+                goto err_free_mem;
+        }
+
+        bu21013_data->in_dev = in_dev;
+        bu21013_data->chip = pdata;
+        bu21013_data->client = client;
+        bu21013_data->touch_stopped = false;
+        init_waitqueue_head(&bu21013_data->wait);
+
+        /* configure the gpio pins */
+        if (pdata->cs_en) {
+                error = pdata->cs_en(pdata->cs_pin);
+                if (error < 0) {
+                        dev_err(&client->dev, "chip init failed\n");
+                        goto err_free_mem;
+                }
+        }
+
+        /* configure the touch panel controller */
+        error = bu21013_init_chip(bu21013_data);
+        if (error) {
+                dev_err(&client->dev, "error in bu21013 config\n");
+                goto err_cs_disable;
+        }
+
+        /* register the device to input subsystem */
+        in_dev->name = DRIVER_TP;
+        in_dev->id.bustype = BUS_I2C;
+        in_dev->dev.parent = &client->dev;
+
+        __set_bit(EV_SYN, in_dev->evbit);
+        __set_bit(EV_KEY, in_dev->evbit);
+        __set_bit(EV_ABS, in_dev->evbit);
+
+        input_set_abs_params(in_dev, ABS_MT_POSITION_X, 0,
+                                                pdata->x_max_res, 0, 0);
+        input_set_abs_params(in_dev, ABS_MT_POSITION_Y, 0,
+                                                pdata->y_max_res, 0, 0);
+        input_set_drvdata(in_dev, bu21013_data);
+
+        error = request_threaded_irq(pdata->irq, NULL, bu21013_gpio_irq,
+                                     IRQF_TRIGGER_FALLING | IRQF_SHARED,
+                                     DRIVER_TP, bu21013_data);
+        if (error) {
+                dev_err(&client->dev, "request irq %d failed\n", pdata->irq);
+                goto err_cs_disable;
+        }
+
+        error = input_register_device(in_dev);
+        if (error) {
+                dev_err(&client->dev, "failed to register input device\n");
+                goto err_free_irq;
+        }
+
+        device_init_wakeup(&client->dev, pdata->wakeup);
+        i2c_set_clientdata(client, bu21013_data);
+
+        return 0;
+
+err_free_irq:
+        bu21013_free_irq(bu21013_data);
+err_cs_disable:
+        pdata->cs_dis(pdata->cs_pin);
+err_free_mem:
+        input_free_device(bu21013_data->in_dev);
+        kfree(bu21013_data);
+
+        return error;
+}
+/**
+ * bu21013_remove() - removes the i2c-client touchscreen driver
+ * @client: i2c client structure pointer
+ *
+ * This function uses to remove the i2c-client
+ * touchscreen driver and returns integer.
+ */
+static int __devexit bu21013_remove(struct i2c_client *client)
+{
+        struct bu21013_ts_data *bu21013_data = i2c_get_clientdata(client);
+
+        bu21013_free_irq(bu21013_data);
+
+        bu21013_data->chip->cs_dis(bu21013_data->chip->cs_pin);
+
+        input_unregister_device(bu21013_data->in_dev);
+        kfree(bu21013_data);
+
+        device_init_wakeup(&client->dev, false);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+/**
+ * bu21013_suspend() - suspend the touch screen controller
+ * @dev: pointer to device structure
+ *
+ * This function is used to suspend the
+ * touch panel controller and returns integer
+ */
+static int bu21013_suspend(struct device *dev)
+{
+        struct bu21013_ts_data *bu21013_data = dev_get_drvdata(dev);
+        struct i2c_client *client = bu21013_data->client;
+
+        bu21013_data->touch_stopped = true;
+        if (device_may_wakeup(&client->dev))
+                enable_irq_wake(bu21013_data->chip->irq);
+        else
+                disable_irq(bu21013_data->chip->irq);
+
+        return 0;
+}
+
+/**
+ * bu21013_resume() - resume the touch screen controller
+ * @dev: pointer to device structure
+ *
+ * This function is used to resume the touch panel
+ * controller and returns integer.
+ */
+static int bu21013_resume(struct device *dev)
+{
+        struct bu21013_ts_data *bu21013_data = dev_get_drvdata(dev);
+        struct i2c_client *client = bu21013_data->client;
+        int retval;
+
+        retval = bu21013_init_chip(bu21013_data);
+        if (retval < 0) {
+                dev_err(&client->dev, "bu21013 controller config failed\n");
+                return retval;
+        }
+
+        bu21013_data->touch_stopped = false;
+
+        if (device_may_wakeup(&client->dev))
+                disable_irq_wake(bu21013_data->chip->irq);
+        else
+                enable_irq(bu21013_data->chip->irq);
+
+        return 0;
+}
+
+static const struct dev_pm_ops bu21013_dev_pm_ops = {
+        .suspend = bu21013_suspend,
+        .resume  = bu21013_resume,
+};
+#endif
+
+static const struct i2c_device_id bu21013_id[] = {
+        { DRIVER_TP, 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, bu21013_id);
+
+static struct i2c_driver bu21013_driver = {
+        .driver = {
+                .name   =       DRIVER_TP,
+                .owner  =       THIS_MODULE,
+#ifdef CONFIG_PM
+                .pm     =       &bu21013_dev_pm_ops,
+#endif
+        },
+        .probe          =       bu21013_probe,
+        .remove         =       __devexit_p(bu21013_remove),
+        .id_table       =       bu21013_id,
+};
+
+/**
+ * bu21013_init() - initializes the bu21013 touchscreen driver
+ *
+ * This function used to initializes the bu21013
+ * touchscreen driver and returns integer.
+ */
+static int __init bu21013_init(void)
+{
+        return i2c_add_driver(&bu21013_driver);
+}
+
+/**
+ * bu21013_exit() - de-initializes the bu21013 touchscreen driver
+ *
+ * This function uses to de-initializes the bu21013
+ * touchscreen driver and returns none.
+ */
+static void __exit bu21013_exit(void)
+{
+        i2c_del_driver(&bu21013_driver);
+}
+
+module_init(bu21013_init);
+module_exit(bu21013_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Naveen Kumar G <naveen.gaddipati@stericsson.com>");
+MODULE_DESCRIPTION("bu21013 touch screen controller driver");
diff --git a/drivers/input/touchscreen/cy8ctmg110_ts.c b/drivers/input/touchscreen/cy8ctmg110_ts.c
index 5ec0946938fe..d0c3a7229adf 100644
--- a/drivers/input/touchscreen/cy8ctmg110_ts.c
+++ b/drivers/input/touchscreen/cy8ctmg110_ts.c
@@ -206,9 +206,9 @@ static int __devinit cy8ctmg110_probe(struct i2c_client *client,
         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
 
         input_set_abs_params(input_dev, ABS_X,
-                        CY8CTMG110_X_MIN, CY8CTMG110_X_MAX, 0, 0);
+                        CY8CTMG110_X_MIN, CY8CTMG110_X_MAX, 4, 0);
         input_set_abs_params(input_dev, ABS_Y,
-                        CY8CTMG110_Y_MIN, CY8CTMG110_Y_MAX, 0, 0);
+                        CY8CTMG110_Y_MIN, CY8CTMG110_Y_MAX, 4, 0);
 
         if (ts->reset_pin) {
                 err = gpio_request(ts->reset_pin, NULL);
diff --git a/drivers/input/touchscreen/hp680_ts_input.c b/drivers/input/touchscreen/hp680_ts_input.c
index a89700e7ace4..498bd62af09a 100644
--- a/drivers/input/touchscreen/hp680_ts_input.c
+++ b/drivers/input/touchscreen/hp680_ts_input.c
@@ -107,8 +107,7 @@ static int __init hp680_ts_init(void)
         return 0;
 
  fail2: free_irq(HP680_TS_IRQ, NULL);
-        cancel_delayed_work(&work);
-        flush_scheduled_work();
+        cancel_delayed_work_sync(&work);
  fail1: input_free_device(hp680_ts_dev);
         return err;
 }
@@ -116,8 +115,7 @@ static int __init hp680_ts_init(void)
 static void __exit hp680_ts_exit(void)
 {
         free_irq(HP680_TS_IRQ, NULL);
-        cancel_delayed_work(&work);
-        flush_scheduled_work();
+        cancel_delayed_work_sync(&work);
         input_unregister_device(hp680_ts_dev);
 }
 
diff --git a/drivers/input/touchscreen/intel-mid-touch.c b/drivers/input/touchscreen/intel-mid-touch.c
new file mode 100644
index 000000000000..c0307b22d86f
--- /dev/null
+++ b/drivers/input/touchscreen/intel-mid-touch.c
@@ -0,0 +1,687 @@
+/*
+ * Intel MID Resistive Touch Screen Driver
+ *
+ * Copyright (C) 2008 Intel Corp
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Questions/Comments/Bug fixes to Sreedhara (sreedhara.ds@intel.com)
+ *                          Ramesh Agarwal (ramesh.agarwal@intel.com)
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * TODO:
+ *      review conversion of r/m/w sequences
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/param.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+#include <asm/intel_scu_ipc.h>
+
+/* PMIC Interrupt registers */
+#define PMIC_REG_ID1            0x00 /* PMIC ID1 register */
+
+/* PMIC Interrupt registers */
+#define PMIC_REG_INT            0x04 /* PMIC interrupt register */
+#define PMIC_REG_MINT           0x05 /* PMIC interrupt mask register */
+
+/* ADC Interrupt registers */
+#define PMIC_REG_ADCINT         0x5F /* ADC interrupt register */
+#define PMIC_REG_MADCINT        0x60 /* ADC interrupt mask register */
+
+/* ADC Control registers */
+#define PMIC_REG_ADCCNTL1       0x61 /* ADC control register */
+
+/* ADC Channel Selection registers */
+#define PMICADDR0               0xA4
+#define END_OF_CHANNEL          0x1F
+
+/* ADC Result register */
+#define PMIC_REG_ADCSNS0H       0x64
+
+/* ADC channels for touch screen */
+#define MRST_TS_CHAN10          0xA /* Touch screen X+ connection */
+#define MRST_TS_CHAN11          0xB /* Touch screen X- connection */
+#define MRST_TS_CHAN12          0xC /* Touch screen Y+ connection */
+#define MRST_TS_CHAN13          0xD /* Touch screen Y- connection */
+
+/* Touch screen channel BIAS constants */
+#define MRST_XBIAS              0x20
+#define MRST_YBIAS              0x40
+#define MRST_ZBIAS              0x80
+
+/* Touch screen coordinates */
+#define MRST_X_MIN              10
+#define MRST_X_MAX              1024
+#define MRST_X_FUZZ             5
+#define MRST_Y_MIN              10
+#define MRST_Y_MAX              1024
+#define MRST_Y_FUZZ             5
+#define MRST_PRESSURE_MIN       0
+#define MRST_PRESSURE_NOMINAL   50
+#define MRST_PRESSURE_MAX       100
+
+#define WAIT_ADC_COMPLETION     10 /* msec */
+
+/* PMIC ADC round robin delays */
+#define ADC_LOOP_DELAY0         0x0 /* Continuous loop */
+#define ADC_LOOP_DELAY1         0x1 /* 4.5  ms approximate */
+
+/* PMIC Vendor Identifiers */
+#define PMIC_VENDOR_FS          0 /* PMIC vendor FreeScale */
+#define PMIC_VENDOR_MAXIM       1 /* PMIC vendor MAXIM */
+#define PMIC_VENDOR_NEC         2 /* PMIC vendor NEC */
+#define MRSTOUCH_MAX_CHANNELS   32 /* Maximum ADC channels */
+
+/* Touch screen device structure */
+struct mrstouch_dev {
+        struct device *dev; /* device associated with touch screen */
+        struct input_dev *input;
+        char phys[32];
+        u16 asr;                /* Address selection register */
+        int irq;
+        unsigned int vendor;    /* PMIC vendor */
+        unsigned int rev;       /* PMIC revision */
+
+        int (*read_prepare)(struct mrstouch_dev *tsdev);
+        int (*read)(struct mrstouch_dev *tsdev, u16 *x, u16 *y, u16 *z);
+        int (*read_finish)(struct mrstouch_dev *tsdev);
+};
+
+
+/*************************** NEC and Maxim Interface ************************/
+
+static int mrstouch_nec_adc_read_prepare(struct mrstouch_dev *tsdev)
+{
+        return intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0, 0x20);
+}
+
+/*
+ * Enables PENDET interrupt.
+ */
+static int mrstouch_nec_adc_read_finish(struct mrstouch_dev *tsdev)
+{
+        int err;
+
+        err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x20, 0x20);
+        if (!err)
+                err = intel_scu_ipc_update_register(PMIC_REG_ADCCNTL1, 0, 0x05);
+
+        return err;
+}
+
+/*
+ * Reads PMIC ADC touch screen result
+ * Reads ADC storage registers for higher 7 and lower 3 bits and
+ * converts the two readings into a single value and turns off gain bit
+ */
+static int mrstouch_ts_chan_read(u16 offset, u16 chan, u16 *vp, u16 *vm)
+{
+        int err;
+        u16 result;
+        u32 res;
+
+        result = PMIC_REG_ADCSNS0H + offset;
+
+        if (chan == MRST_TS_CHAN12)
+                result += 4;
+
+        err = intel_scu_ipc_ioread32(result, &res);
+        if (err)
+                return err;
+
+        /* Mash the bits up */
+
+        *vp = (res & 0xFF) << 3;        /* Highest 7 bits */
+        *vp |= (res >> 8) & 0x07;       /* Lower 3 bits */
+        *vp &= 0x3FF;
+
+        res >>= 16;
+
+        *vm = (res & 0xFF) << 3;        /* Highest 7 bits */
+        *vm |= (res >> 8) & 0x07;       /* Lower 3 bits */
+        *vm &= 0x3FF;
+
+        return 0;
+}
+
+/*
+ * Enables X, Y and Z bias values
+ * Enables YPYM for X channels and XPXM for Y channels
+ */
+static int mrstouch_ts_bias_set(uint offset, uint bias)
+{
+        int count;
+        u16 chan, start;
+        u16 reg[4];
+        u8 data[4];
+
+        chan = PMICADDR0 + offset;
+        start = MRST_TS_CHAN10;
+
+        for (count = 0; count <= 3; count++) {
+                reg[count] = chan++;
+                data[count] = bias | (start + count);
+        }
+
+        return intel_scu_ipc_writev(reg, data, 4);
+}
+
+/* To read touch screen channel values */
+static int mrstouch_nec_adc_read(struct mrstouch_dev *tsdev,
+                                 u16 *x, u16 *y, u16 *z)
+{
+        int err;
+        u16 xm, ym, zm;
+
+        /* configure Y bias for X channels */
+        err = mrstouch_ts_bias_set(tsdev->asr, MRST_YBIAS);
+        if (err)
+                goto ipc_error;
+
+        msleep(WAIT_ADC_COMPLETION);
+
+        /* read x+ and x- channels */
+        err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, x, &xm);
+        if (err)
+                goto ipc_error;
+
+        /* configure x bias for y channels */
+        err = mrstouch_ts_bias_set(tsdev->asr, MRST_XBIAS);
+        if (err)
+                goto ipc_error;
+
+        msleep(WAIT_ADC_COMPLETION);
+
+        /* read y+ and y- channels */
+        err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN12, y, &ym);
+        if (err)
+                goto ipc_error;
+
+        /* configure z bias for x and y channels */
+        err = mrstouch_ts_bias_set(tsdev->asr, MRST_ZBIAS);
+        if (err)
+                goto ipc_error;
+
+        msleep(WAIT_ADC_COMPLETION);
+
+        /* read z+ and z- channels */
+        err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, z, &zm);
+        if (err)
+                goto ipc_error;
+
+        return 0;
+
+ipc_error:
+        dev_err(tsdev->dev, "ipc error during adc read\n");
+        return err;
+}
+
+
+/*************************** Freescale Interface ************************/
+
+static int mrstouch_fs_adc_read_prepare(struct mrstouch_dev *tsdev)
+{
+        int err, count;
+        u16 chan;
+        u16 reg[5];
+        u8 data[5];
+
+        /* Stop the ADC */
+        err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x00, 0x02);
+        if (err)
+                goto ipc_error;
+
+        chan = PMICADDR0 + tsdev->asr;
+
+        /* Set X BIAS */
+        for (count = 0; count <= 3; count++) {
+                reg[count] = chan++;
+                data[count] = 0x2A;
+        }
+        reg[count] =  chan++; /* Dummy */
+        data[count] = 0;
+
+        err = intel_scu_ipc_writev(reg, data, 5);
+        if (err)
+                goto ipc_error;
+
+        msleep(WAIT_ADC_COMPLETION);
+
+        /* Set Y BIAS */
+        for (count = 0; count <= 3; count++) {
+                reg[count] = chan++;
+                data[count] = 0x4A;
+        }
+        reg[count] = chan++; /* Dummy */
+        data[count] = 0;
+
+        err = intel_scu_ipc_writev(reg, data, 5);
+        if (err)
+                goto ipc_error;
+
+        msleep(WAIT_ADC_COMPLETION);
+
+        /* Set Z BIAS */
+        err = intel_scu_ipc_iowrite32(chan + 2, 0x8A8A8A8A);
+        if (err)
+                goto ipc_error;
+
+        msleep(WAIT_ADC_COMPLETION);
+
+        return 0;
+
+ipc_error:
+        dev_err(tsdev->dev, "ipc error during %s\n", __func__);
+        return err;
+}
+
+static int mrstouch_fs_adc_read(struct mrstouch_dev *tsdev,
+                                u16 *x, u16 *y, u16 *z)
+{
+        int err;
+        u16 result;
+        u16 reg[4];
+        u8 data[4];
+
+        result = PMIC_REG_ADCSNS0H + tsdev->asr;
+
+        reg[0] = result + 4;
+        reg[1] = result + 5;
+        reg[2] = result + 16;
+        reg[3] = result + 17;
+
+        err = intel_scu_ipc_readv(reg, data, 4);
+        if (err)
+                goto ipc_error;
+
+        *x = data[0] << 3; /* Higher 7 bits */
+        *x |= data[1] & 0x7; /* Lower 3 bits */
+        *x &= 0x3FF;
+
+        *y = data[2] << 3; /* Higher 7 bits */
+        *y |= data[3] & 0x7; /* Lower 3 bits */
+        *y &= 0x3FF;
+
+        /* Read Z value */
+        reg[0] = result + 28;
+        reg[1] = result + 29;
+
+        err = intel_scu_ipc_readv(reg, data, 4);
+        if (err)
+                goto ipc_error;
+
+        *z = data[0] << 3; /* Higher 7 bits */
+        *z |= data[1] & 0x7; /* Lower 3 bits */
+        *z &= 0x3FF;
+
+        return 0;
+
+ipc_error:
+        dev_err(tsdev->dev, "ipc error during %s\n", __func__);
+        return err;
+}
+
+static int mrstouch_fs_adc_read_finish(struct mrstouch_dev *tsdev)
+{
+        int err, count;
+        u16 chan;
+        u16 reg[5];
+        u8 data[5];
+
+        /* Clear all TS channels */
+        chan = PMICADDR0 + tsdev->asr;
+        for (count = 0; count <= 4; count++) {
+                reg[count] = chan++;
+                data[count] = 0;
+        }
+        err = intel_scu_ipc_writev(reg, data, 5);
+        if (err)
+                goto ipc_error;
+
+        for (count = 0; count <= 4; count++) {
+                reg[count] = chan++;
+                data[count] = 0;
+        }
+        err = intel_scu_ipc_writev(reg, data, 5);
+        if (err)
+                goto ipc_error;
+
+        err = intel_scu_ipc_iowrite32(chan + 2, 0x00000000);
+        if (err)
+                goto ipc_error;
+
+        /* Start ADC */
+        err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x02, 0x02);
+        if (err)
+                goto ipc_error;
+
+        return 0;
+
+ipc_error:
+        dev_err(tsdev->dev, "ipc error during %s\n", __func__);
+        return err;
+}
+
+static void mrstouch_report_event(struct input_dev *input,
+                        unsigned int x, unsigned int y, unsigned int z)
+{
+        if (z > MRST_PRESSURE_NOMINAL) {
+                /* Pen touched, report button touch and coordinates */
+                input_report_key(input, BTN_TOUCH, 1);
+                input_report_abs(input, ABS_X, x);
+                input_report_abs(input, ABS_Y, y);
+        } else {
+                input_report_key(input, BTN_TOUCH, 0);
+        }
+
+        input_report_abs(input, ABS_PRESSURE, z);
+        input_sync(input);
+}
+
+/* PENDET interrupt handler */
+static irqreturn_t mrstouch_pendet_irq(int irq, void *dev_id)
+{
+        struct mrstouch_dev *tsdev = dev_id;
+        u16 x, y, z;
+
+        /*
+         * Should we lower thread priority? Probably not, since we are
+         * not spinning but sleeping...
+         */
+
+        if (tsdev->read_prepare(tsdev))
+                goto out;
+
+        do {
+                if (tsdev->read(tsdev, &x, &y, &z))
+                        break;
+
+                mrstouch_report_event(tsdev->input, x, y, z);
+        } while (z > MRST_PRESSURE_NOMINAL);
+
+        tsdev->read_finish(tsdev);
+
+out:
+        return IRQ_HANDLED;
+}
+
+/* Utility to read PMIC ID */
+static int __devinit mrstouch_read_pmic_id(uint *vendor, uint *rev)
+{
+        int err;
+        u8 r;
+
+        err = intel_scu_ipc_ioread8(PMIC_REG_ID1, &r);
+        if (err)
+                return err;
+
+        *vendor = r & 0x7;
+        *rev = (r >> 3) & 0x7;
+
+        return 0;
+}
+
+/*
+ * Parse ADC channels to find end of the channel configured by other ADC user
+ * NEC and MAXIM requires 4 channels and FreeScale needs 18 channels
+ */
+static int __devinit mrstouch_chan_parse(struct mrstouch_dev *tsdev)
+{
+        int err, i, found;
+        u8 r8;
+
+        found = -1;
+
+        for (i = 0; i < MRSTOUCH_MAX_CHANNELS; i++) {
+                if (found >= 0)
+                        break;
+
+                err = intel_scu_ipc_ioread8(PMICADDR0 + i, &r8);
+                if (err)
+                        return err;
+
+                if (r8 == END_OF_CHANNEL) {
+                        found = i;
+                        break;
+                }
+        }
+        if (found < 0)
+                return 0;
+
+        if (tsdev->vendor == PMIC_VENDOR_FS) {
+                if (found && found > (MRSTOUCH_MAX_CHANNELS - 18))
+                        return -ENOSPC;
+        } else {
+                if (found && found > (MRSTOUCH_MAX_CHANNELS - 4))
+                        return -ENOSPC;
+        }
+        return found;
+}
+
+
+/*
+ * Writes touch screen channels to ADC address selection registers
+ */
+static int __devinit mrstouch_ts_chan_set(uint offset)
+{
+        u16 chan;
+
+        int ret, count;
+
+        chan = PMICADDR0 + offset;
+        for (count = 0; count <= 3; count++) {
+                ret = intel_scu_ipc_iowrite8(chan++, MRST_TS_CHAN10 + count);
+                if (ret)
+                        return ret;
+        }
+        return intel_scu_ipc_iowrite8(chan++, END_OF_CHANNEL);
+}
+
+/* Initialize ADC */
+static int __devinit mrstouch_adc_init(struct mrstouch_dev *tsdev)
+{
+        int err, start;
+        u8 ra, rm;
+
+        err = mrstouch_read_pmic_id(&tsdev->vendor, &tsdev->rev);
+        if (err) {
+                dev_err(tsdev->dev, "Unable to read PMIC id\n");
+                return err;
+        }
+
+        switch (tsdev->vendor) {
+        case PMIC_VENDOR_NEC:
+        case PMIC_VENDOR_MAXIM:
+                tsdev->read_prepare = mrstouch_nec_adc_read_prepare;
+                tsdev->read = mrstouch_nec_adc_read;
+                tsdev->read_finish = mrstouch_nec_adc_read_finish;
+                break;
+
+        case PMIC_VENDOR_FS:
+                tsdev->read_prepare = mrstouch_fs_adc_read_prepare;
+                tsdev->read = mrstouch_fs_adc_read;
+                tsdev->read_finish = mrstouch_fs_adc_read_finish;
+                break;
+
+        default:
+                dev_err(tsdev->dev,
+                        "Unsupported touchscreen: %d\n", tsdev->vendor);
+                return -ENXIO;
+        }
+
+        start = mrstouch_chan_parse(tsdev);
+        if (start < 0) {
+                dev_err(tsdev->dev, "Unable to parse channels\n");
+                return start;
+        }
+
+        tsdev->asr = start;
+
+        /*
+         * ADC power on, start, enable PENDET and set loop delay
+         * ADC loop delay is set to 4.5 ms approximately
+         * Loop delay more than this results in jitter in adc readings
+         * Setting loop delay to 0 (continous loop) in MAXIM stops PENDET
+         * interrupt generation sometimes.
+         */
+
+        if (tsdev->vendor == PMIC_VENDOR_FS) {
+                ra = 0xE0 | ADC_LOOP_DELAY0;
+                rm = 0x5;
+        } else {
+                /* NEC and MAXIm not consistent with loop delay 0 */
+                ra = 0xE0 | ADC_LOOP_DELAY1;
+                rm = 0x0;
+
+                /* configure touch screen channels */
+                err = mrstouch_ts_chan_set(tsdev->asr);
+                if (err)
+                        return err;
+        }
+
+        err = intel_scu_ipc_update_register(PMIC_REG_ADCCNTL1, ra, 0xE7);
+        if (err)
+                return err;
+
+        err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, rm, 0x03);
+        if (err)
+                return err;
+
+        return 0;
+}
+
+
+/* Probe function for touch screen driver */
+static int __devinit mrstouch_probe(struct platform_device *pdev)
+{
+        struct mrstouch_dev *tsdev;
+        struct input_dev *input;
+        int err;
+        int irq;
+
+        irq = platform_get_irq(pdev, 0);
+        if (irq < 0) {
+                dev_err(&pdev->dev, "no interrupt assigned\n");
+                return -EINVAL;
+        }
+
+        tsdev = kzalloc(sizeof(struct mrstouch_dev), GFP_KERNEL);
+        input = input_allocate_device();
+        if (!tsdev || !input) {
+                dev_err(&pdev->dev, "unable to allocate memory\n");
+                err = -ENOMEM;
+                goto err_free_mem;
+        }
+
+        tsdev->dev = &pdev->dev;
+        tsdev->input = input;
+        tsdev->irq = irq;
+
+        snprintf(tsdev->phys, sizeof(tsdev->phys),
+                 "%s/input0", dev_name(tsdev->dev));
+
+        err = mrstouch_adc_init(tsdev);
+        if (err) {
+                dev_err(&pdev->dev, "ADC initialization failed\n");
+                goto err_free_mem;
+        }
+
+        input->name = "mrst_touchscreen";
+        input->phys = tsdev->phys;
+        input->dev.parent = tsdev->dev;
+
+        input->id.vendor = tsdev->vendor;
+        input->id.version = tsdev->rev;
+
+        input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+        input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+
+        input_set_abs_params(tsdev->input, ABS_X,
+                             MRST_X_MIN, MRST_X_MAX, MRST_X_FUZZ, 0);
+        input_set_abs_params(tsdev->input, ABS_Y,
+                             MRST_Y_MIN, MRST_Y_MAX, MRST_Y_FUZZ, 0);
+        input_set_abs_params(tsdev->input, ABS_PRESSURE,
+                             MRST_PRESSURE_MIN, MRST_PRESSURE_MAX, 0, 0);
+
+        err = request_threaded_irq(tsdev->irq, NULL, mrstouch_pendet_irq,
+                                   0, "mrstouch", tsdev);
+        if (err) {
+                dev_err(tsdev->dev, "unable to allocate irq\n");
+                goto err_free_mem;
+        }
+
+        err = input_register_device(tsdev->input);
+        if (err) {
+                dev_err(tsdev->dev, "unable to register input device\n");
+                goto err_free_irq;
+        }
+
+        platform_set_drvdata(pdev, tsdev);
+        return 0;
+
+err_free_irq:
+        free_irq(tsdev->irq, tsdev);
+err_free_mem:
+        input_free_device(input);
+        kfree(tsdev);
+        return err;
+}
+
+static int __devexit mrstouch_remove(struct platform_device *pdev)
+{
+        struct mrstouch_dev *tsdev = platform_get_drvdata(pdev);
+
+        free_irq(tsdev->irq, tsdev);
+        input_unregister_device(tsdev->input);
+        kfree(tsdev);
+
+        platform_set_drvdata(pdev, NULL);
+
+        return 0;
+}
+
+static struct platform_driver mrstouch_driver = {
+        .driver = {
+                .name   = "pmic_touch",
+                .owner  = THIS_MODULE,
+        },
+        .probe          = mrstouch_probe,
+        .remove         = __devexit_p(mrstouch_remove),
+};
+
+static int __init mrstouch_init(void)
+{
+        return platform_driver_register(&mrstouch_driver);
+}
+module_init(mrstouch_init);
+
+static void __exit mrstouch_exit(void)
+{
+        platform_driver_unregister(&mrstouch_driver);
+}
+module_exit(mrstouch_exit);
+
+MODULE_AUTHOR("Sreedhara Murthy. D.S, sreedhara.ds@intel.com");
+MODULE_DESCRIPTION("Intel Moorestown Resistive Touch Screen Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/lpc32xx_ts.c b/drivers/input/touchscreen/lpc32xx_ts.c
new file mode 100644
index 000000000000..dcf803f5a1f7
--- /dev/null
+++ b/drivers/input/touchscreen/lpc32xx_ts.c
@@ -0,0 +1,411 @@
+/*
+ * LPC32xx built-in touchscreen driver
+ *
+ * Copyright (C) 2010 NXP Semiconductors
+ *
+ * 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/platform_device.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+
+/*
+ * Touchscreen controller register offsets
+ */
+#define LPC32XX_TSC_STAT                        0x00
+#define LPC32XX_TSC_SEL                         0x04
+#define LPC32XX_TSC_CON                         0x08
+#define LPC32XX_TSC_FIFO                        0x0C
+#define LPC32XX_TSC_DTR                         0x10
+#define LPC32XX_TSC_RTR                         0x14
+#define LPC32XX_TSC_UTR                         0x18
+#define LPC32XX_TSC_TTR                         0x1C
+#define LPC32XX_TSC_DXP                         0x20
+#define LPC32XX_TSC_MIN_X                       0x24
+#define LPC32XX_TSC_MAX_X                       0x28
+#define LPC32XX_TSC_MIN_Y                       0x2C
+#define LPC32XX_TSC_MAX_Y                       0x30
+#define LPC32XX_TSC_AUX_UTR                     0x34
+#define LPC32XX_TSC_AUX_MIN                     0x38
+#define LPC32XX_TSC_AUX_MAX                     0x3C
+
+#define LPC32XX_TSC_STAT_FIFO_OVRRN             (1 << 8)
+#define LPC32XX_TSC_STAT_FIFO_EMPTY             (1 << 7)
+
+#define LPC32XX_TSC_SEL_DEFVAL                  0x0284
+
+#define LPC32XX_TSC_ADCCON_IRQ_TO_FIFO_4        (0x1 << 11)
+#define LPC32XX_TSC_ADCCON_X_SAMPLE_SIZE(s)     ((10 - (s)) << 7)
+#define LPC32XX_TSC_ADCCON_Y_SAMPLE_SIZE(s)     ((10 - (s)) << 4)
+#define LPC32XX_TSC_ADCCON_POWER_UP             (1 << 2)
+#define LPC32XX_TSC_ADCCON_AUTO_EN              (1 << 0)
+
+#define LPC32XX_TSC_FIFO_TS_P_LEVEL             (1 << 31)
+#define LPC32XX_TSC_FIFO_NORMALIZE_X_VAL(x)     (((x) & 0x03FF0000) >> 16)
+#define LPC32XX_TSC_FIFO_NORMALIZE_Y_VAL(y)     ((y) & 0x000003FF)
+
+#define LPC32XX_TSC_ADCDAT_VALUE_MASK           0x000003FF
+
+#define LPC32XX_TSC_MIN_XY_VAL                  0x0
+#define LPC32XX_TSC_MAX_XY_VAL                  0x3FF
+
+#define MOD_NAME "ts-lpc32xx"
+
+#define tsc_readl(dev, reg) \
+        __raw_readl((dev)->tsc_base + (reg))
+#define tsc_writel(dev, reg, val) \
+        __raw_writel((val), (dev)->tsc_base + (reg))
+
+struct lpc32xx_tsc {
+        struct input_dev *dev;
+        void __iomem *tsc_base;
+        int irq;
+        struct clk *clk;
+};
+
+static void lpc32xx_fifo_clear(struct lpc32xx_tsc *tsc)
+{
+        while (!(tsc_readl(tsc, LPC32XX_TSC_STAT) &
+                        LPC32XX_TSC_STAT_FIFO_EMPTY))
+                tsc_readl(tsc, LPC32XX_TSC_FIFO);
+}
+
+static irqreturn_t lpc32xx_ts_interrupt(int irq, void *dev_id)
+{
+        u32 tmp, rv[4], xs[4], ys[4];
+        int idx;
+        struct lpc32xx_tsc *tsc = dev_id;
+        struct input_dev *input = tsc->dev;
+
+        tmp = tsc_readl(tsc, LPC32XX_TSC_STAT);
+
+        if (tmp & LPC32XX_TSC_STAT_FIFO_OVRRN) {
+                /* FIFO overflow - throw away samples */
+                lpc32xx_fifo_clear(tsc);
+                return IRQ_HANDLED;
+        }
+
+        /*
+         * Gather and normalize 4 samples. Pen-up events may have less
+         * than 4 samples, but its ok to pop 4 and let the last sample
+         * pen status check drop the samples.
+         */
+        idx = 0;
+        while (idx < 4 &&
+               !(tsc_readl(tsc, LPC32XX_TSC_STAT) &
+                        LPC32XX_TSC_STAT_FIFO_EMPTY)) {
+                tmp = tsc_readl(tsc, LPC32XX_TSC_FIFO);
+                xs[idx] = LPC32XX_TSC_ADCDAT_VALUE_MASK -
+                        LPC32XX_TSC_FIFO_NORMALIZE_X_VAL(tmp);
+                ys[idx] = LPC32XX_TSC_ADCDAT_VALUE_MASK -
+                        LPC32XX_TSC_FIFO_NORMALIZE_Y_VAL(tmp);
+                rv[idx] = tmp;
+                idx++;
+        }
+
+        /* Data is only valid if pen is still down in last sample */
+        if (!(rv[3] & LPC32XX_TSC_FIFO_TS_P_LEVEL) && idx == 4) {
+                /* Use average of 2nd and 3rd sample for position */
+                input_report_abs(input, ABS_X, (xs[1] + xs[2]) / 2);
+                input_report_abs(input, ABS_Y, (ys[1] + ys[2]) / 2);
+                input_report_key(input, BTN_TOUCH, 1);
+        } else {
+                input_report_key(input, BTN_TOUCH, 0);
+        }
+
+        input_sync(input);
+
+        return IRQ_HANDLED;
+}
+
+static void lpc32xx_stop_tsc(struct lpc32xx_tsc *tsc)
+{
+        /* Disable auto mode */
+        tsc_writel(tsc, LPC32XX_TSC_CON,
+                   tsc_readl(tsc, LPC32XX_TSC_CON) &
+                             ~LPC32XX_TSC_ADCCON_AUTO_EN);
+
+        clk_disable(tsc->clk);
+}
+
+static void lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc)
+{
+        u32 tmp;
+
+        clk_enable(tsc->clk);
+
+        tmp = tsc_readl(tsc, LPC32XX_TSC_CON) & ~LPC32XX_TSC_ADCCON_POWER_UP;
+
+        /* Set the TSC FIFO depth to 4 samples @ 10-bits per sample (max) */
+        tmp = LPC32XX_TSC_ADCCON_IRQ_TO_FIFO_4 |
+              LPC32XX_TSC_ADCCON_X_SAMPLE_SIZE(10) |
+              LPC32XX_TSC_ADCCON_Y_SAMPLE_SIZE(10);
+        tsc_writel(tsc, LPC32XX_TSC_CON, tmp);
+
+        /* These values are all preset */
+        tsc_writel(tsc, LPC32XX_TSC_SEL, LPC32XX_TSC_SEL_DEFVAL);
+        tsc_writel(tsc, LPC32XX_TSC_MIN_X, LPC32XX_TSC_MIN_XY_VAL);
+        tsc_writel(tsc, LPC32XX_TSC_MAX_X, LPC32XX_TSC_MAX_XY_VAL);
+        tsc_writel(tsc, LPC32XX_TSC_MIN_Y, LPC32XX_TSC_MIN_XY_VAL);
+        tsc_writel(tsc, LPC32XX_TSC_MAX_Y, LPC32XX_TSC_MAX_XY_VAL);
+
+        /* Aux support is not used */
+        tsc_writel(tsc, LPC32XX_TSC_AUX_UTR, 0);
+        tsc_writel(tsc, LPC32XX_TSC_AUX_MIN, 0);
+        tsc_writel(tsc, LPC32XX_TSC_AUX_MAX, 0);
+
+        /*
+         * Set sample rate to about 240Hz per X/Y pair. A single measurement
+         * consists of 4 pairs which gives about a 60Hz sample rate based on
+         * a stable 32768Hz clock source. Values are in clocks.
+         * Rate is (32768 / (RTR + XCONV + RTR + YCONV + DXP + TTR + UTR) / 4
+         */
+        tsc_writel(tsc, LPC32XX_TSC_RTR, 0x2);
+        tsc_writel(tsc, LPC32XX_TSC_DTR, 0x2);
+        tsc_writel(tsc, LPC32XX_TSC_TTR, 0x10);
+        tsc_writel(tsc, LPC32XX_TSC_DXP, 0x4);
+        tsc_writel(tsc, LPC32XX_TSC_UTR, 88);
+
+        lpc32xx_fifo_clear(tsc);
+
+        /* Enable automatic ts event capture */
+        tsc_writel(tsc, LPC32XX_TSC_CON, tmp | LPC32XX_TSC_ADCCON_AUTO_EN);
+}
+
+static int lpc32xx_ts_open(struct input_dev *dev)
+{
+        struct lpc32xx_tsc *tsc = input_get_drvdata(dev);
+
+        lpc32xx_setup_tsc(tsc);
+
+        return 0;
+}
+
+static void lpc32xx_ts_close(struct input_dev *dev)
+{
+        struct lpc32xx_tsc *tsc = input_get_drvdata(dev);
+
+        lpc32xx_stop_tsc(tsc);
+}
+
+static int __devinit lpc32xx_ts_probe(struct platform_device *pdev)
+{
+        struct lpc32xx_tsc *tsc;
+        struct input_dev *input;
+        struct resource *res;
+        resource_size_t size;
+        int irq;
+        int error;
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                dev_err(&pdev->dev, "Can't get memory resource\n");
+                return -ENOENT;
+        }
+
+        irq = platform_get_irq(pdev, 0);
+        if (irq < 0) {
+                dev_err(&pdev->dev, "Can't get interrupt resource\n");
+                return irq;
+        }
+
+        tsc = kzalloc(sizeof(*tsc), GFP_KERNEL);
+        input = input_allocate_device();
+        if (!tsc || !input) {
+                dev_err(&pdev->dev, "failed allocating memory\n");
+                error = -ENOMEM;
+                goto err_free_mem;
+        }
+
+        tsc->dev = input;
+        tsc->irq = irq;
+
+        size = resource_size(res);
+
+        if (!request_mem_region(res->start, size, pdev->name)) {
+                dev_err(&pdev->dev, "TSC registers are not free\n");
+                error = -EBUSY;
+                goto err_free_mem;
+        }
+
+        tsc->tsc_base = ioremap(res->start, size);
+        if (!tsc->tsc_base) {
+                dev_err(&pdev->dev, "Can't map memory\n");
+                error = -ENOMEM;
+                goto err_release_mem;
+        }
+
+        tsc->clk = clk_get(&pdev->dev, NULL);
+        if (IS_ERR(tsc->clk)) {
+                dev_err(&pdev->dev, "failed getting clock\n");
+                error = PTR_ERR(tsc->clk);
+                goto err_unmap;
+        }
+
+        input->name = MOD_NAME;
+        input->phys = "lpc32xx/input0";
+        input->id.bustype = BUS_HOST;
+        input->id.vendor = 0x0001;
+        input->id.product = 0x0002;
+        input->id.version = 0x0100;
+        input->dev.parent = &pdev->dev;
+        input->open = lpc32xx_ts_open;
+        input->close = lpc32xx_ts_close;
+
+        input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+        input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+        input_set_abs_params(input, ABS_X, LPC32XX_TSC_MIN_XY_VAL,
+                             LPC32XX_TSC_MAX_XY_VAL, 0, 0);
+        input_set_abs_params(input, ABS_Y, LPC32XX_TSC_MIN_XY_VAL,
+                             LPC32XX_TSC_MAX_XY_VAL, 0, 0);
+
+        input_set_drvdata(input, tsc);
+
+        error = request_irq(tsc->irq, lpc32xx_ts_interrupt,
+                            IRQF_DISABLED, pdev->name, tsc);
+        if (error) {
+                dev_err(&pdev->dev, "failed requesting interrupt\n");
+                goto err_put_clock;
+        }
+
+        error = input_register_device(input);
+        if (error) {
+                dev_err(&pdev->dev, "failed registering input device\n");
+                goto err_free_irq;
+        }
+
+        platform_set_drvdata(pdev, tsc);
+        device_init_wakeup(&pdev->dev, 1);
+
+        return 0;
+
+err_free_irq:
+        free_irq(tsc->irq, tsc);
+err_put_clock:
+        clk_put(tsc->clk);
+err_unmap:
+        iounmap(tsc->tsc_base);
+err_release_mem:
+        release_mem_region(res->start, size);
+err_free_mem:
+        input_free_device(input);
+        kfree(tsc);
+
+        return error;
+}
+
+static int __devexit lpc32xx_ts_remove(struct platform_device *pdev)
+{
+        struct lpc32xx_tsc *tsc = platform_get_drvdata(pdev);
+        struct resource *res;
+
+        device_init_wakeup(&pdev->dev, 0);
+        free_irq(tsc->irq, tsc);
+
+        input_unregister_device(tsc->dev);
+
+        clk_put(tsc->clk);
+
+        iounmap(tsc->tsc_base);
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        release_mem_region(res->start, resource_size(res));
+
+        kfree(tsc);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static int lpc32xx_ts_suspend(struct device *dev)
+{
+        struct lpc32xx_tsc *tsc = dev_get_drvdata(dev);
+        struct input_dev *input = tsc->dev;
+
+        /*
+         * Suspend and resume can be called when the device hasn't been
+         * enabled. If there are no users that have the device open, then
+         * avoid calling the TSC stop and start functions as the TSC
+         * isn't yet clocked.
+         */
+        mutex_lock(&input->mutex);
+
+        if (input->users) {
+                if (device_may_wakeup(dev))
+                        enable_irq_wake(tsc->irq);
+                else
+                        lpc32xx_stop_tsc(tsc);
+        }
+
+        mutex_unlock(&input->mutex);
+
+        return 0;
+}
+
+static int lpc32xx_ts_resume(struct device *dev)
+{
+        struct lpc32xx_tsc *tsc = dev_get_drvdata(dev);
+        struct input_dev *input = tsc->dev;
+
+        mutex_lock(&input->mutex);
+
+        if (input->users) {
+                if (device_may_wakeup(dev))
+                        disable_irq_wake(tsc->irq);
+                else
+                        lpc32xx_setup_tsc(tsc);
+        }
+
+        mutex_unlock(&input->mutex);
+
+        return 0;
+}
+
+static const struct dev_pm_ops lpc32xx_ts_pm_ops = {
+        .suspend        = lpc32xx_ts_suspend,
+        .resume         = lpc32xx_ts_resume,
+};
+#define LPC32XX_TS_PM_OPS (&lpc32xx_ts_pm_ops)
+#else
+#define LPC32XX_TS_PM_OPS NULL
+#endif
+
+static struct platform_driver lpc32xx_ts_driver = {
+        .probe          = lpc32xx_ts_probe,
+        .remove         = __devexit_p(lpc32xx_ts_remove),
+        .driver         = {
+                .name   = MOD_NAME,
+                .owner  = THIS_MODULE,
+                .pm     = LPC32XX_TS_PM_OPS,
+        },
+};
+
+static int __init lpc32xx_ts_init(void)
+{
+        return platform_driver_register(&lpc32xx_ts_driver);
+}
+module_init(lpc32xx_ts_init);
+
+static void __exit lpc32xx_ts_exit(void)
+{
+        platform_driver_unregister(&lpc32xx_ts_driver);
+}
+module_exit(lpc32xx_ts_exit);
+
+MODULE_AUTHOR("Kevin Wells <kevin.wells@nxp.com");
+MODULE_DESCRIPTION("LPC32XX TSC Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:lpc32xx_ts");
diff --git a/drivers/input/touchscreen/s3c2410_ts.c b/drivers/input/touchscreen/s3c2410_ts.c
index 6085d12fd561..8feb7f3c8be1 100644
--- a/drivers/input/touchscreen/s3c2410_ts.c
+++ b/drivers/input/touchscreen/s3c2410_ts.c
@@ -350,7 +350,7 @@ static int __devinit s3c2410ts_probe(struct platform_device *pdev)
  err_tcirq:
         free_irq(ts.irq_tc, ts.input);
  err_inputdev:
-        input_unregister_device(ts.input);
+        input_free_device(ts.input);
  err_iomap:
         iounmap(ts.io);
  err_clk:
diff --git a/drivers/input/touchscreen/stmpe-ts.c b/drivers/input/touchscreen/stmpe-ts.c
index 656148ec0027..ae88e13c99ff 100644
--- a/drivers/input/touchscreen/stmpe-ts.c
+++ b/drivers/input/touchscreen/stmpe-ts.c
@@ -268,7 +268,7 @@ static int __devinit stmpe_input_probe(struct platform_device *pdev)
         struct stmpe_touch *ts;
         struct input_dev *idev;
         struct stmpe_ts_platform_data *ts_pdata = NULL;
-        int ret = 0;
+        int ret;
         int ts_irq;
 
         ts_irq = platform_get_irq_byname(pdev, "FIFO_TH");
@@ -276,12 +276,16 @@ static int __devinit stmpe_input_probe(struct platform_device *pdev)
                 return ts_irq;
 
         ts = kzalloc(sizeof(*ts), GFP_KERNEL);
-        if (!ts)
+        if (!ts) {
+                ret = -ENOMEM;
                 goto err_out;
+        }
 
         idev = input_allocate_device();
-        if (!idev)
+        if (!idev) {
+                ret = -ENOMEM;
                 goto err_free_ts;
+        }
 
         platform_set_drvdata(pdev, ts);
         ts->stmpe = stmpe;
@@ -361,7 +365,6 @@ static int __devexit stmpe_ts_remove(struct platform_device *pdev)
         platform_set_drvdata(pdev, NULL);
 
         input_unregister_device(ts->idev);
-        input_free_device(ts->idev);
 
         kfree(ts);
 
diff --git a/drivers/input/touchscreen/tps6507x-ts.c b/drivers/input/touchscreen/tps6507x-ts.c
index a644d18c04dc..c8c136cf7bbc 100644
--- a/drivers/input/touchscreen/tps6507x-ts.c
+++ b/drivers/input/touchscreen/tps6507x-ts.c
@@ -335,6 +335,7 @@ static int tps6507x_ts_probe(struct platform_device *pdev)
                 dev_err(tsc->dev, "schedule failed");
                 goto err2;
          }
+        platform_set_drvdata(pdev, tps6507x_dev);
 
         return 0;
 
@@ -358,7 +359,7 @@ static int __devexit tps6507x_ts_remove(struct platform_device *pdev)
         cancel_delayed_work_sync(&tsc->work);
         destroy_workqueue(tsc->wq);
 
-        input_free_device(input_dev);
+        input_unregister_device(input_dev);
 
         tps6507x_dev->ts = NULL;
         kfree(tsc);
diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c
index be23780e8a3e..80467f262331 100644
--- a/drivers/input/touchscreen/tsc2007.c
+++ b/drivers/input/touchscreen/tsc2007.c
@@ -265,7 +265,7 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
                                    const struct i2c_device_id *id)
 {
         struct tsc2007 *ts;
-        struct tsc2007_platform_data *pdata = pdata = client->dev.platform_data;
+        struct tsc2007_platform_data *pdata = client->dev.platform_data;
         struct input_dev *input_dev;
         int err;
 
diff --git a/drivers/input/touchscreen/wacom_w8001.c b/drivers/input/touchscreen/wacom_w8001.c
index 56dc35c94bb1..9ae4c7b16ba7 100644
--- a/drivers/input/touchscreen/wacom_w8001.c
+++ b/drivers/input/touchscreen/wacom_w8001.c
@@ -2,6 +2,7 @@
  * Wacom W8001 penabled serial touchscreen driver
  *
  * Copyright (c) 2008 Jaya Kumar
+ * Copyright (c) 2010 Red Hat, Inc.
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License. See the file COPYING in the main directory of this archive for
@@ -30,11 +31,24 @@ MODULE_LICENSE("GPL");
 #define W8001_LEAD_BYTE         0x80
 #define W8001_TAB_MASK          0x40
 #define W8001_TAB_BYTE          0x40
+/* set in first byte of touch data packets */
+#define W8001_TOUCH_MASK        (0x10 | W8001_LEAD_MASK)
+#define W8001_TOUCH_BYTE        (0x10 | W8001_LEAD_BYTE)
 
 #define W8001_QUERY_PACKET      0x20
 
 #define W8001_CMD_START         '1'
 #define W8001_CMD_QUERY         '*'
+#define W8001_CMD_TOUCHQUERY    '%'
+
+/* length of data packets in bytes, depends on device. */
+#define W8001_PKTLEN_TOUCH93    5
+#define W8001_PKTLEN_TOUCH9A    7
+#define W8001_PKTLEN_TPCPEN     9
+#define W8001_PKTLEN_TPCCTL     11      /* control packet */
+#define W8001_PKTLEN_TOUCH2FG   13
+
+#define MAX_TRACKING_ID         0xFF    /* arbitrarily chosen */
 
 struct w8001_coord {
         u8 rdy;
@@ -48,6 +62,15 @@ struct w8001_coord {
         u8 tilt_y;
 };
 
+/* touch query reply packet */
+struct w8001_touch_query {
+        u8 panel_res;
+        u8 capacity_res;
+        u8 sensor_id;
+        u16 x;
+        u16 y;
+};
+
 /*
  * Per-touchscreen data.
  */
@@ -62,6 +85,9 @@ struct w8001 {
         unsigned char response[W8001_MAX_LENGTH];
         unsigned char data[W8001_MAX_LENGTH];
         char phys[32];
+        int type;
+        unsigned int pktlen;
+        int trkid[2];
 };
 
 static void parse_data(u8 *data, struct w8001_coord *coord)
@@ -88,11 +114,98 @@ static void parse_data(u8 *data, struct w8001_coord *coord)
         coord->tilt_y = data[8] & 0x7F;
 }
 
+static void parse_touch(struct w8001 *w8001)
+{
+        static int trkid;
+        struct input_dev *dev = w8001->dev;
+        unsigned char *data = w8001->data;
+        int i;
+
+        for (i = 0; i < 2; i++) {
+                input_mt_slot(dev, i);
+
+                if (data[0] & (1 << i)) {
+                        int x = (data[6 * i + 1] << 7) | (data[6 * i + 2]);
+                        int y = (data[6 * i + 3] << 7) | (data[6 * i + 4]);
+                        /* data[5,6] and [11,12] is finger capacity */
+
+                        input_report_abs(dev, ABS_MT_POSITION_X, x);
+                        input_report_abs(dev, ABS_MT_POSITION_Y, y);
+                        input_report_abs(dev, ABS_MT_TOOL_TYPE, MT_TOOL_FINGER);
+                        if (w8001->trkid[i] < 0)
+                                w8001->trkid[i] = trkid++ & MAX_TRACKING_ID;
+                } else {
+                        w8001->trkid[i] = -1;
+                }
+                input_report_abs(dev, ABS_MT_TRACKING_ID, w8001->trkid[i]);
+        }
+
+        input_sync(dev);
+}
+
+static void parse_touchquery(u8 *data, struct w8001_touch_query *query)
+{
+        memset(query, 0, sizeof(*query));
+
+        query->panel_res = data[1];
+        query->sensor_id = data[2] & 0x7;
+        query->capacity_res = data[7];
+
+        query->x = data[3] << 9;
+        query->x |= data[4] << 2;
+        query->x |= (data[2] >> 5) & 0x3;
+
+        query->y = data[5] << 9;
+        query->y |= data[6] << 2;
+        query->y |= (data[2] >> 3) & 0x3;
+}
+
+static void report_pen_events(struct w8001 *w8001, struct w8001_coord *coord)
+{
+        struct input_dev *dev = w8001->dev;
+
+        /*
+         * We have 1 bit for proximity (rdy) and 3 bits for tip, side,
+         * side2/eraser. If rdy && f2 are set, this can be either pen + side2,
+         * or eraser. assume
+         * - if dev is already in proximity and f2 is toggled → pen + side2
+         * - if dev comes into proximity with f2 set → eraser
+         * If f2 disappears after assuming eraser, fake proximity out for
+         * eraser and in for pen.
+         */
+
+        if (!w8001->type) {
+                w8001->type = coord->f2 ? BTN_TOOL_RUBBER : BTN_TOOL_PEN;
+        } else if (w8001->type == BTN_TOOL_RUBBER) {
+                if (!coord->f2) {
+                        input_report_abs(dev, ABS_PRESSURE, 0);
+                        input_report_key(dev, BTN_TOUCH, 0);
+                        input_report_key(dev, BTN_STYLUS, 0);
+                        input_report_key(dev, BTN_STYLUS2, 0);
+                        input_report_key(dev, BTN_TOOL_RUBBER, 0);
+                        input_sync(dev);
+                        w8001->type = BTN_TOOL_PEN;
+                }
+        } else {
+                input_report_key(dev, BTN_STYLUS2, coord->f2);
+        }
+
+        input_report_abs(dev, ABS_X, coord->x);
+        input_report_abs(dev, ABS_Y, coord->y);
+        input_report_abs(dev, ABS_PRESSURE, coord->pen_pressure);
+        input_report_key(dev, BTN_TOUCH, coord->tsw);
+        input_report_key(dev, BTN_STYLUS, coord->f1);
+        input_report_key(dev, w8001->type, coord->rdy);
+        input_sync(dev);
+
+        if (!coord->rdy)
+                w8001->type = 0;
+}
+
 static irqreturn_t w8001_interrupt(struct serio *serio,
                                    unsigned char data, unsigned int flags)
 {
         struct w8001 *w8001 = serio_get_drvdata(serio);
-        struct input_dev *dev = w8001->dev;
         struct w8001_coord coord;
         unsigned char tmp;
 
@@ -105,26 +218,45 @@ static irqreturn_t w8001_interrupt(struct serio *serio,
                 }
                 break;
 
-        case 8:
+        case W8001_PKTLEN_TOUCH93 - 1:
+        case W8001_PKTLEN_TOUCH9A - 1:
+                /* ignore one-finger touch packet. */
+                if (w8001->pktlen == w8001->idx)
+                        w8001->idx = 0;
+                break;
+
+        /* Pen coordinates packet */
+        case W8001_PKTLEN_TPCPEN - 1:
                 tmp = w8001->data[0] & W8001_TAB_MASK;
                 if (unlikely(tmp == W8001_TAB_BYTE))
                         break;
 
+                tmp = (w8001->data[0] & W8001_TOUCH_BYTE);
+                if (tmp == W8001_TOUCH_BYTE)
+                        break;
+
                 w8001->idx = 0;
                 parse_data(w8001->data, &coord);
-                input_report_abs(dev, ABS_X, coord.x);
-                input_report_abs(dev, ABS_Y, coord.y);
-                input_report_abs(dev, ABS_PRESSURE, coord.pen_pressure);
-                input_report_key(dev, BTN_TOUCH, coord.tsw);
-                input_sync(dev);
+                report_pen_events(w8001, &coord);
                 break;
 
-        case 10:
+        /* control packet */
+        case W8001_PKTLEN_TPCCTL - 1:
+                tmp = (w8001->data[0] & W8001_TOUCH_MASK);
+                if (tmp == W8001_TOUCH_BYTE)
+                        break;
+
                 w8001->idx = 0;
                 memcpy(w8001->response, w8001->data, W8001_MAX_LENGTH);
                 w8001->response_type = W8001_QUERY_PACKET;
                 complete(&w8001->cmd_done);
                 break;
+
+        /* 2 finger touch packet */
+        case W8001_PKTLEN_TOUCH2FG - 1:
+                w8001->idx = 0;
+                parse_touch(w8001);
+                break;
         }
 
         return IRQ_HANDLED;
@@ -167,6 +299,38 @@ static int w8001_setup(struct w8001 *w8001)
         input_set_abs_params(dev, ABS_TILT_X, 0, coord.tilt_x, 0, 0);
         input_set_abs_params(dev, ABS_TILT_Y, 0, coord.tilt_y, 0, 0);
 
+        error = w8001_command(w8001, W8001_CMD_TOUCHQUERY, true);
+        if (!error) {
+                struct w8001_touch_query touch;
+
+                parse_touchquery(w8001->response, &touch);
+
+                switch (touch.sensor_id) {
+                case 0:
+                case 2:
+                        w8001->pktlen = W8001_PKTLEN_TOUCH93;
+                        break;
+                case 1:
+                case 3:
+                case 4:
+                        w8001->pktlen = W8001_PKTLEN_TOUCH9A;
+                        break;
+                case 5:
+                        w8001->pktlen = W8001_PKTLEN_TOUCH2FG;
+
+                        input_mt_create_slots(dev, 2);
+                        input_set_abs_params(dev, ABS_MT_TRACKING_ID,
+                                                0, MAX_TRACKING_ID, 0, 0);
+                        input_set_abs_params(dev, ABS_MT_POSITION_X,
+                                                0, touch.x, 0, 0);
+                        input_set_abs_params(dev, ABS_MT_POSITION_Y,
+                                                0, touch.y, 0, 0);
+                        input_set_abs_params(dev, ABS_MT_TOOL_TYPE,
+                                                0, 0, 0, 0);
+                        break;
+                }
+        }
+
         return w8001_command(w8001, W8001_CMD_START, false);
 }
 
@@ -208,6 +372,7 @@ static int w8001_connect(struct serio *serio, struct serio_driver *drv)
         w8001->serio = serio;
         w8001->id = serio->id.id;
         w8001->dev = input_dev;
+        w8001->trkid[0] = w8001->trkid[1] = -1;
         init_completion(&w8001->cmd_done);
         snprintf(w8001->phys, sizeof(w8001->phys), "%s/input0", serio->phys);
 
@@ -221,6 +386,10 @@ static int w8001_connect(struct serio *serio, struct serio_driver *drv)
 
         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+        input_dev->keybit[BIT_WORD(BTN_TOOL_PEN)] |= BIT_MASK(BTN_TOOL_PEN);
+        input_dev->keybit[BIT_WORD(BTN_TOOL_RUBBER)] |= BIT_MASK(BTN_TOOL_RUBBER);
+        input_dev->keybit[BIT_WORD(BTN_STYLUS)] |= BIT_MASK(BTN_STYLUS);
+        input_dev->keybit[BIT_WORD(BTN_STYLUS2)] |= BIT_MASK(BTN_STYLUS2);
 
         serio_set_drvdata(serio, w8001);
         err = serio_open(serio, drv);
diff --git a/drivers/input/touchscreen/wm97xx-core.c b/drivers/input/touchscreen/wm97xx-core.c
index cbfef1ea7e30..6b75c9f660ae 100644
--- a/drivers/input/touchscreen/wm97xx-core.c
+++ b/drivers/input/touchscreen/wm97xx-core.c
@@ -125,6 +125,8 @@ int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel)
 {
         int power_adc = 0, auxval;
         u16 power = 0;
+        int rc = 0;
+        int timeout = 0;
 
         /* get codec */
         mutex_lock(&wm->codec_mutex);
@@ -143,7 +145,9 @@ int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel)
 
         /* Turn polling mode on to read AUX ADC */
         wm->pen_probably_down = 1;
-        wm->codec->poll_sample(wm, adcsel, &auxval);
+
+        while (rc != RC_VALID && timeout++ < 5)
+                rc = wm->codec->poll_sample(wm, adcsel, &auxval);
 
         if (power_adc)
                 wm97xx_reg_write(wm, AC97_EXTENDED_MID, power | 0x8000);
@@ -152,8 +156,15 @@ int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel)
 
         wm->pen_probably_down = 0;
 
+        if (timeout >= 5) {
+                dev_err(wm->dev,
+                        "timeout reading auxadc %d, disabling digitiser\n",
+                        adcsel);
+                wm->codec->dig_enable(wm, false);
+        }
+
         mutex_unlock(&wm->codec_mutex);
-        return auxval & 0xfff;
+        return (rc == RC_VALID ? auxval & 0xfff : -EBUSY);
 }
 EXPORT_SYMBOL_GPL(wm97xx_read_aux_adc);
 
@@ -684,8 +695,7 @@ static int wm97xx_probe(struct device *dev)
  touch_reg_err:
         platform_device_put(wm->touch_dev);
  touch_err:
-        platform_device_unregister(wm->battery_dev);
-        wm->battery_dev = NULL;
+        platform_device_del(wm->battery_dev);
  batt_reg_err:
         platform_device_put(wm->battery_dev);
  batt_err: