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

Pull input updates from Dmitry Torokhov:
 "A few drivers were updated with device tree bindings and others got a
  few small cleanups and fixes."

Fix trivial conflict in drivers/input/keyboard/omap-keypad.c due to
changes clashing with a whitespace cleanup.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (28 commits)
  Input: wacom - mark Intuos5 pad as in-prox when touching buttons
  Input: synaptics - adjust threshold for treating position values as negative
  Input: hgpk - use %*ph to dump small buffer
  Input: gpio_keys_polled - fix dt pdata->nbuttons
  Input: Add KD[GS]KBDIACRUC ioctls to the compatible list
  Input: omap-keypad - fixed formatting
  Input: tegra - move platform data header
  Input: wacom - add support for EMR on Cintiq 24HD touch
  Input: s3c2410_ts - make s3c_ts_pmops const
  Input: samsung-keypad - use of_get_child_count() helper
  Input: samsung-keypad - use of_match_ptr()
  Input: uinput - fix formatting
  Input: uinput - specify exact bit sizes on userspace APIs
  Input: uinput - mark failed submission requests as free
  Input: uinput - fix race that can block nonblocking read
  Input: uinput - return -EINVAL when read buffer size is too small
  Input: uinput - take event lock when fetching events from buffer
  Input: get rid of MATCH_BIT() macro
  Input: rotary-encoder - add DT bindings
  Input: rotary-encoder - constify platform data pointers
  ...

19 files changed, 520 insertions, 274 deletions

diff --git a/drivers/input/apm-power.c b/drivers/input/apm-power.c
index e90ee3d3061..650177a3c85 100644
--- a/drivers/input/apm-power.c
+++ b/drivers/input/apm-power.c
@@ -33,7 +33,7 @@ static void system_power_event(unsigned int keycode)
 }
 
 static void apmpower_event(struct input_handle *handle, unsigned int type,
-		        unsigned int code, int value)
+			   unsigned int code, int value)
 {
 	/* only react on key down events */
 	if (value != 1)
diff --git a/drivers/input/ff-core.c b/drivers/input/ff-core.c
index 480eb9d9876..f50f6dd9227 100644
--- a/drivers/input/ff-core.c
+++ b/drivers/input/ff-core.c
@@ -138,8 +138,8 @@ int input_ff_upload(struct input_dev *dev, struct ff_effect *effect,
 
 	if (effect->id == -1) {
 		for (id = 0; id < ff->max_effects; id++)
-		     if (!ff->effect_owners[id])
-			break;
+			if (!ff->effect_owners[id])
+				break;
 
 		if (id >= ff->max_effects) {
 			ret = -ENOSPC;
diff --git a/drivers/input/ff-memless.c b/drivers/input/ff-memless.c
index b107922514f..74c0d8c6002 100644
--- a/drivers/input/ff-memless.c
+++ b/drivers/input/ff-memless.c
@@ -72,12 +72,14 @@ static const struct ff_envelope *get_envelope(const struct ff_effect *effect)
 	static const struct ff_envelope empty_envelope;
 
 	switch (effect->type) {
-		case FF_PERIODIC:
-			return &effect->u.periodic.envelope;
-		case FF_CONSTANT:
-			return &effect->u.constant.envelope;
-		default:
-			return &empty_envelope;
+	case FF_PERIODIC:
+		return &effect->u.periodic.envelope;
+
+	case FF_CONSTANT:
+		return &effect->u.constant.envelope;
+
+	default:
+		return &empty_envelope;
 	}
 }
 
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 5244f3d05b1..ace3f7c4226 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -918,18 +918,10 @@ int input_set_keycode(struct input_dev *dev,
 }
 EXPORT_SYMBOL(input_set_keycode);
 
-#define MATCH_BIT(bit, max) \
-		for (i = 0; i < BITS_TO_LONGS(max); i++) \
-			if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \
-				break; \
-		if (i != BITS_TO_LONGS(max)) \
-			continue;
-
 static const struct input_device_id *input_match_device(struct input_handler *handler,
 							struct input_dev *dev)
 {
 	const struct input_device_id *id;
-	int i;
 
 	for (id = handler->id_table; id->flags || id->driver_info; id++) {
 
@@ -949,15 +941,32 @@ static const struct input_device_id *input_match_device(struct input_handler *ha
 			if (id->version != dev->id.version)
 				continue;
 
-		MATCH_BIT(evbit,  EV_MAX);
-		MATCH_BIT(keybit, KEY_MAX);
-		MATCH_BIT(relbit, REL_MAX);
-		MATCH_BIT(absbit, ABS_MAX);
-		MATCH_BIT(mscbit, MSC_MAX);
-		MATCH_BIT(ledbit, LED_MAX);
-		MATCH_BIT(sndbit, SND_MAX);
-		MATCH_BIT(ffbit,  FF_MAX);
-		MATCH_BIT(swbit,  SW_MAX);
+		if (!bitmap_subset(id->evbit, dev->evbit, EV_MAX))
+			continue;
+
+		if (!bitmap_subset(id->keybit, dev->keybit, KEY_MAX))
+			continue;
+
+		if (!bitmap_subset(id->relbit, dev->relbit, REL_MAX))
+			continue;
+
+		if (!bitmap_subset(id->absbit, dev->absbit, ABS_MAX))
+			continue;
+
+		if (!bitmap_subset(id->mscbit, dev->mscbit, MSC_MAX))
+			continue;
+
+		if (!bitmap_subset(id->ledbit, dev->ledbit, LED_MAX))
+			continue;
+
+		if (!bitmap_subset(id->sndbit, dev->sndbit, SND_MAX))
+			continue;
+
+		if (!bitmap_subset(id->ffbit, dev->ffbit, FF_MAX))
+			continue;
+
+		if (!bitmap_subset(id->swbit, dev->swbit, SW_MAX))
+			continue;
 
 		if (!handler->match || handler->match(handler, dev))
 			return id;
diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c
index 26043cc6a01..78f323ea1e4 100644
--- a/drivers/input/joydev.c
+++ b/drivers/input/joydev.c
@@ -711,7 +711,7 @@ static long joydev_ioctl(struct file *file,
 
 	case JS_SET_ALL:
 		retval = copy_from_user(&joydev->glue, argp,
-					sizeof(joydev->glue)) ? -EFAULT: 0;
+					sizeof(joydev->glue)) ? -EFAULT : 0;
 		break;
 
 	case JS_GET_ALL:
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index cbb1add43d5..6a68041c261 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -43,11 +43,9 @@ struct gpio_button_data {
 };
 
 struct gpio_keys_drvdata {
+	const struct gpio_keys_platform_data *pdata;
 	struct input_dev *input;
 	struct mutex disable_lock;
-	unsigned int n_buttons;
-	int (*enable)(struct device *dev);
-	void (*disable)(struct device *dev);
 	struct gpio_button_data data[0];
 };
 
@@ -171,7 +169,7 @@ static ssize_t gpio_keys_attr_show_helper(struct gpio_keys_drvdata *ddata,
 	if (!bits)
 		return -ENOMEM;
 
-	for (i = 0; i < ddata->n_buttons; i++) {
+	for (i = 0; i < ddata->pdata->nbuttons; i++) {
 		struct gpio_button_data *bdata = &ddata->data[i];
 
 		if (bdata->button->type != type)
@@ -219,7 +217,7 @@ static ssize_t gpio_keys_attr_store_helper(struct gpio_keys_drvdata *ddata,
 		goto out;
 
 	/* First validate */
-	for (i = 0; i < ddata->n_buttons; i++) {
+	for (i = 0; i < ddata->pdata->nbuttons; i++) {
 		struct gpio_button_data *bdata = &ddata->data[i];
 
 		if (bdata->button->type != type)
@@ -234,7 +232,7 @@ static ssize_t gpio_keys_attr_store_helper(struct gpio_keys_drvdata *ddata,
 
 	mutex_lock(&ddata->disable_lock);
 
-	for (i = 0; i < ddata->n_buttons; i++) {
+	for (i = 0; i < ddata->pdata->nbuttons; i++) {
 		struct gpio_button_data *bdata = &ddata->data[i];
 
 		if (bdata->button->type != type)
@@ -346,6 +344,9 @@ static void gpio_keys_gpio_work_func(struct work_struct *work)
 		container_of(work, struct gpio_button_data, work);
 
 	gpio_keys_gpio_report_event(bdata);
+
+	if (bdata->button->wakeup)
+		pm_relax(bdata->input->dev.parent);
 }
 
 static void gpio_keys_gpio_timer(unsigned long _data)
@@ -361,6 +362,8 @@ static irqreturn_t gpio_keys_gpio_isr(int irq, void *dev_id)
 
 	BUG_ON(irq != bdata->irq);
 
+	if (bdata->button->wakeup)
+		pm_stay_awake(bdata->input->dev.parent);
 	if (bdata->timer_debounce)
 		mod_timer(&bdata->timer,
 			jiffies + msecs_to_jiffies(bdata->timer_debounce));
@@ -397,6 +400,9 @@ static irqreturn_t gpio_keys_irq_isr(int irq, void *dev_id)
 	spin_lock_irqsave(&bdata->lock, flags);
 
 	if (!bdata->key_pressed) {
+		if (bdata->button->wakeup)
+			pm_wakeup_event(bdata->input->dev.parent, 0);
+
 		input_event(input, EV_KEY, button->code, 1);
 		input_sync(input);
 
@@ -523,56 +529,64 @@ fail:
 static int gpio_keys_open(struct input_dev *input)
 {
 	struct gpio_keys_drvdata *ddata = input_get_drvdata(input);
+	const struct gpio_keys_platform_data *pdata = ddata->pdata;
 
-	return ddata->enable ? ddata->enable(input->dev.parent) : 0;
+	return pdata->enable ? pdata->enable(input->dev.parent) : 0;
 }
 
 static void gpio_keys_close(struct input_dev *input)
 {
 	struct gpio_keys_drvdata *ddata = input_get_drvdata(input);
+	const struct gpio_keys_platform_data *pdata = ddata->pdata;
 
-	if (ddata->disable)
-		ddata->disable(input->dev.parent);
+	if (pdata->disable)
+		pdata->disable(input->dev.parent);
 }
 
 /*
  * Handlers for alternative sources of platform_data
  */
+
 #ifdef CONFIG_OF
 /*
  * Translate OpenFirmware node properties into platform_data
  */
-static int gpio_keys_get_devtree_pdata(struct device *dev,
-			    struct gpio_keys_platform_data *pdata)
+static struct gpio_keys_platform_data * __devinit
+gpio_keys_get_devtree_pdata(struct device *dev)
 {
 	struct device_node *node, *pp;
+	struct gpio_keys_platform_data *pdata;
+	struct gpio_keys_button *button;
+	int error;
+	int nbuttons;
 	int i;
-	struct gpio_keys_button *buttons;
-	u32 reg;
 
 	node = dev->of_node;
-	if (node == NULL)
-		return -ENODEV;
-
-	memset(pdata, 0, sizeof *pdata);
+	if (!node) {
+		error = -ENODEV;
+		goto err_out;
+	}
 
-	pdata->rep = !!of_get_property(node, "autorepeat", NULL);
+	nbuttons = of_get_child_count(node);
+	if (nbuttons == 0) {
+		error = -ENODEV;
+		goto err_out;
+	}
 
-	/* First count the subnodes */
-	pp = NULL;
-	while ((pp = of_get_next_child(node, pp)))
-		pdata->nbuttons++;
+	pdata = kzalloc(sizeof(*pdata) + nbuttons * (sizeof *button),
+			GFP_KERNEL);
+	if (!pdata) {
+		error = -ENOMEM;
+		goto err_out;
+	}
 
-	if (pdata->nbuttons == 0)
-		return -ENODEV;
+	pdata->buttons = (struct gpio_keys_button *)(pdata + 1);
+	pdata->nbuttons = nbuttons;
 
-	buttons = kzalloc(pdata->nbuttons * (sizeof *buttons), GFP_KERNEL);
-	if (!buttons)
-		return -ENOMEM;
+	pdata->rep = !!of_get_property(node, "autorepeat", NULL);
 
-	pp = NULL;
 	i = 0;
-	while ((pp = of_get_next_child(node, pp))) {
+	for_each_child_of_node(node, pp) {
 		enum of_gpio_flags flags;
 
 		if (!of_find_property(pp, "gpios", NULL)) {
@@ -580,39 +594,42 @@ static int gpio_keys_get_devtree_pdata(struct device *dev,
 			dev_warn(dev, "Found button without gpios\n");
 			continue;
 		}
-		buttons[i].gpio = of_get_gpio_flags(pp, 0, &flags);
-		buttons[i].active_low = flags & OF_GPIO_ACTIVE_LOW;
 
-		if (of_property_read_u32(pp, "linux,code", &reg)) {
-			dev_err(dev, "Button without keycode: 0x%x\n", buttons[i].gpio);
-			goto out_fail;
-		}
-		buttons[i].code = reg;
+		button = &pdata->buttons[i++];
 
-		buttons[i].desc = of_get_property(pp, "label", NULL);
+		button->gpio = of_get_gpio_flags(pp, 0, &flags);
+		button->active_low = flags & OF_GPIO_ACTIVE_LOW;
 
-		if (of_property_read_u32(pp, "linux,input-type", &reg) == 0)
-			buttons[i].type = reg;
-		else
-			buttons[i].type = EV_KEY;
+		if (of_property_read_u32(pp, "linux,code", &button->code)) {
+			dev_err(dev, "Button without keycode: 0x%x\n",
+				button->gpio);
+			error = -EINVAL;
+			goto err_free_pdata;
+		}
 
-		buttons[i].wakeup = !!of_get_property(pp, "gpio-key,wakeup", NULL);
+		button->desc = of_get_property(pp, "label", NULL);
 
-		if (of_property_read_u32(pp, "debounce-interval", &reg) == 0)
-			buttons[i].debounce_interval = reg;
-		else
-			buttons[i].debounce_interval = 5;
+		if (of_property_read_u32(pp, "linux,input-type", &button->type))
+			button->type = EV_KEY;
 
-		i++;
+		button->wakeup = !!of_get_property(pp, "gpio-key,wakeup", NULL);
+
+		if (of_property_read_u32(pp, "debounce-interval",
+					 &button->debounce_interval))
+			button->debounce_interval = 5;
 	}
 
-	pdata->buttons = buttons;
+	if (pdata->nbuttons == 0) {
+		error = -EINVAL;
+		goto err_free_pdata;
+	}
 
-	return 0;
+	return pdata;
 
-out_fail:
-	kfree(buttons);
-	return -ENODEV;
+err_free_pdata:
+	kfree(pdata);
+err_out:
+	return ERR_PTR(error);
 }
 
 static struct of_device_id gpio_keys_of_match[] = {
@@ -623,14 +640,12 @@ MODULE_DEVICE_TABLE(of, gpio_keys_of_match);
 
 #else
 
-static int gpio_keys_get_devtree_pdata(struct device *dev,
-			    struct gpio_keys_platform_data *altp)
+static inline struct gpio_keys_platform_data *
+gpio_keys_get_devtree_pdata(struct device *dev)
 {
-	return -ENODEV;
+	return ERR_PTR(-ENODEV);
 }
 
-#define gpio_keys_of_match NULL
-
 #endif
 
 static void gpio_remove_key(struct gpio_button_data *bdata)
@@ -645,19 +660,17 @@ static void gpio_remove_key(struct gpio_button_data *bdata)
 
 static int __devinit gpio_keys_probe(struct platform_device *pdev)
 {
-	const struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
-	struct gpio_keys_drvdata *ddata;
 	struct device *dev = &pdev->dev;
-	struct gpio_keys_platform_data alt_pdata;
+	const struct gpio_keys_platform_data *pdata = dev_get_platdata(dev);
+	struct gpio_keys_drvdata *ddata;
 	struct input_dev *input;
 	int i, error;
 	int wakeup = 0;
 
 	if (!pdata) {
-		error = gpio_keys_get_devtree_pdata(dev, &alt_pdata);
-		if (error)
-			return error;
-		pdata = &alt_pdata;
+		pdata = gpio_keys_get_devtree_pdata(dev);
+		if (IS_ERR(pdata))
+			return PTR_ERR(pdata);
 	}
 
 	ddata = kzalloc(sizeof(struct gpio_keys_drvdata) +
@@ -670,10 +683,8 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
 		goto fail1;
 	}
 
+	ddata->pdata = pdata;
 	ddata->input = input;
-	ddata->n_buttons = pdata->nbuttons;
-	ddata->enable = pdata->enable;
-	ddata->disable = pdata->disable;
 	mutex_init(&ddata->disable_lock);
 
 	platform_set_drvdata(pdev, ddata);
@@ -742,9 +753,9 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
  fail1:
 	input_free_device(input);
 	kfree(ddata);
-	/* If we have no platform_data, we allocated buttons dynamically. */
-	if (!pdev->dev.platform_data)
-		kfree(pdata->buttons);
+	/* If we have no platform data, we allocated pdata dynamically. */
+	if (!dev_get_platdata(&pdev->dev))
+		kfree(pdata);
 
 	return error;
 }
@@ -759,18 +770,14 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev)
 
 	device_init_wakeup(&pdev->dev, 0);
 
-	for (i = 0; i < ddata->n_buttons; i++)
+	for (i = 0; i < ddata->pdata->nbuttons; i++)
 		gpio_remove_key(&ddata->data[i]);
 
 	input_unregister_device(input);
 
-	/*
-	 * If we had no platform_data, we allocated buttons dynamically, and
-	 * must free them here. ddata->data[0].button is the pointer to the
-	 * beginning of the allocated array.
-	 */
-	if (!pdev->dev.platform_data)
-		kfree(ddata->data[0].button);
+	/* If we have no platform data, we allocated pdata dynamically. */
+	if (!dev_get_platdata(&pdev->dev))
+		kfree(ddata->pdata);
 
 	kfree(ddata);
 
@@ -784,7 +791,7 @@ static int gpio_keys_suspend(struct device *dev)
 	int i;
 
 	if (device_may_wakeup(dev)) {
-		for (i = 0; i < ddata->n_buttons; i++) {
+		for (i = 0; i < ddata->pdata->nbuttons; i++) {
 			struct gpio_button_data *bdata = &ddata->data[i];
 			if (bdata->button->wakeup)
 				enable_irq_wake(bdata->irq);
@@ -799,7 +806,7 @@ static int gpio_keys_resume(struct device *dev)
 	struct gpio_keys_drvdata *ddata = dev_get_drvdata(dev);
 	int i;
 
-	for (i = 0; i < ddata->n_buttons; i++) {
+	for (i = 0; i < ddata->pdata->nbuttons; i++) {
 		struct gpio_button_data *bdata = &ddata->data[i];
 		if (bdata->button->wakeup && device_may_wakeup(dev))
 			disable_irq_wake(bdata->irq);
@@ -822,7 +829,7 @@ static struct platform_driver gpio_keys_device_driver = {
 		.name	= "gpio-keys",
 		.owner	= THIS_MODULE,
 		.pm	= &gpio_keys_pm_ops,
-		.of_match_table = gpio_keys_of_match,
+		.of_match_table = of_match_ptr(gpio_keys_of_match),
 	}
 };
 
diff --git a/drivers/input/keyboard/gpio_keys_polled.c b/drivers/input/keyboard/gpio_keys_polled.c
index 20c8ab17221..f2142de789e 100644
--- a/drivers/input/keyboard/gpio_keys_polled.c
+++ b/drivers/input/keyboard/gpio_keys_polled.c
@@ -25,6 +25,8 @@
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
 #include <linux/gpio_keys.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
 
 #define DRV_NAME	"gpio-keys-polled"
 
@@ -38,7 +40,7 @@ struct gpio_keys_button_data {
 struct gpio_keys_polled_dev {
 	struct input_polled_dev *poll_dev;
 	struct device *dev;
-	struct gpio_keys_platform_data *pdata;
+	const struct gpio_keys_platform_data *pdata;
 	struct gpio_keys_button_data data[0];
 };
 
@@ -67,11 +69,11 @@ static void gpio_keys_polled_check_state(struct input_dev *input,
 static void gpio_keys_polled_poll(struct input_polled_dev *dev)
 {
 	struct gpio_keys_polled_dev *bdev = dev->private;
-	struct gpio_keys_platform_data *pdata = bdev->pdata;
+	const struct gpio_keys_platform_data *pdata = bdev->pdata;
 	struct input_dev *input = dev->input;
 	int i;
 
-	for (i = 0; i < bdev->pdata->nbuttons; i++) {
+	for (i = 0; i < pdata->nbuttons; i++) {
 		struct gpio_keys_button_data *bdata = &bdev->data[i];
 
 		if (bdata->count < bdata->threshold)
@@ -85,7 +87,7 @@ static void gpio_keys_polled_poll(struct input_polled_dev *dev)
 static void gpio_keys_polled_open(struct input_polled_dev *dev)
 {
 	struct gpio_keys_polled_dev *bdev = dev->private;
-	struct gpio_keys_platform_data *pdata = bdev->pdata;
+	const struct gpio_keys_platform_data *pdata = bdev->pdata;
 
 	if (pdata->enable)
 		pdata->enable(bdev->dev);
@@ -94,31 +96,139 @@ static void gpio_keys_polled_open(struct input_polled_dev *dev)
 static void gpio_keys_polled_close(struct input_polled_dev *dev)
 {
 	struct gpio_keys_polled_dev *bdev = dev->private;
-	struct gpio_keys_platform_data *pdata = bdev->pdata;
+	const struct gpio_keys_platform_data *pdata = bdev->pdata;
 
 	if (pdata->disable)
 		pdata->disable(bdev->dev);
 }
 
+#ifdef CONFIG_OF
+static struct gpio_keys_platform_data * __devinit
+gpio_keys_polled_get_devtree_pdata(struct device *dev)
+{
+	struct device_node *node, *pp;
+	struct gpio_keys_platform_data *pdata;
+	struct gpio_keys_button *button;
+	int error;
+	int nbuttons;
+	int i;
+
+	node = dev->of_node;
+	if (!node)
+		return NULL;
+
+	nbuttons = of_get_child_count(node);
+	if (nbuttons == 0)
+		return NULL;
+
+	pdata = kzalloc(sizeof(*pdata) + nbuttons * (sizeof *button),
+			GFP_KERNEL);
+	if (!pdata) {
+		error = -ENOMEM;
+		goto err_out;
+	}
+
+	pdata->buttons = (struct gpio_keys_button *)(pdata + 1);
+	pdata->nbuttons = nbuttons;
+
+	pdata->rep = !!of_get_property(node, "autorepeat", NULL);
+	of_property_read_u32(node, "poll-interval", &pdata->poll_interval);
+
+	i = 0;
+	for_each_child_of_node(node, pp) {
+		enum of_gpio_flags flags;
+
+		if (!of_find_property(pp, "gpios", NULL)) {
+			pdata->nbuttons--;
+			dev_warn(dev, "Found button without gpios\n");
+			continue;
+		}
+
+		button = &pdata->buttons[i++];
+
+		button->gpio = of_get_gpio_flags(pp, 0, &flags);
+		button->active_low = flags & OF_GPIO_ACTIVE_LOW;
+
+		if (of_property_read_u32(pp, "linux,code", &button->code)) {
+			dev_err(dev, "Button without keycode: 0x%x\n",
+				button->gpio);
+			error = -EINVAL;
+			goto err_free_pdata;
+		}
+
+		button->desc = of_get_property(pp, "label", NULL);
+
+		if (of_property_read_u32(pp, "linux,input-type", &button->type))
+			button->type = EV_KEY;
+
+		button->wakeup = !!of_get_property(pp, "gpio-key,wakeup", NULL);
+
+		if (of_property_read_u32(pp, "debounce-interval",
+					 &button->debounce_interval))
+			button->debounce_interval = 5;
+	}
+
+	if (pdata->nbuttons == 0) {
+		error = -EINVAL;
+		goto err_free_pdata;
+	}
+
+	return pdata;
+
+err_free_pdata:
+	kfree(pdata);
+err_out:
+	return ERR_PTR(error);
+}
+
+static struct of_device_id gpio_keys_polled_of_match[] = {
+	{ .compatible = "gpio-keys-polled", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, gpio_keys_polled_of_match);
+
+#else
+
+static inline struct gpio_keys_platform_data *
+gpio_keys_polled_get_devtree_pdata(struct device *dev)
+{
+	return NULL;
+}
+#endif
+
 static int __devinit gpio_keys_polled_probe(struct platform_device *pdev)
 {
-	struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
 	struct device *dev = &pdev->dev;
+	const struct gpio_keys_platform_data *pdata = dev_get_platdata(dev);
 	struct gpio_keys_polled_dev *bdev;
 	struct input_polled_dev *poll_dev;
 	struct input_dev *input;
 	int error;
 	int i;
 
-	if (!pdata || !pdata->poll_interval)
-		return -EINVAL;
+	if (!pdata) {
+		pdata = gpio_keys_polled_get_devtree_pdata(dev);
+		if (IS_ERR(pdata))
+			return PTR_ERR(pdata);
+		if (!pdata) {
+			dev_err(dev, "missing platform data\n");
+			return -EINVAL;
+		}
+	}
+
+	if (!pdata->poll_interval) {
+		dev_err(dev, "missing poll_interval value\n");
+		error = -EINVAL;
+		goto err_free_pdata;
+	}
 
 	bdev = kzalloc(sizeof(struct gpio_keys_polled_dev) +
 		       pdata->nbuttons * sizeof(struct gpio_keys_button_data),
 		       GFP_KERNEL);
 	if (!bdev) {
 		dev_err(dev, "no memory for private data\n");
-		return -ENOMEM;
+		error = -ENOMEM;
+		goto err_free_pdata;
 	}
 
 	poll_dev = input_allocate_polled_device();
@@ -197,7 +307,7 @@ static int __devinit gpio_keys_polled_probe(struct platform_device *pdev)
 	/* report initial state of the buttons */
 	for (i = 0; i < pdata->nbuttons; i++)
 		gpio_keys_polled_check_state(input, &pdata->buttons[i],
-					 &bdev->data[i]);
+					     &bdev->data[i]);
 
 	return 0;
 
@@ -209,15 +319,20 @@ err_free_gpio:
 
 err_free_bdev:
 	kfree(bdev);
-
 	platform_set_drvdata(pdev, NULL);
+
+err_free_pdata:
+	/* If we have no platform_data, we allocated pdata dynamically.  */
+	if (!dev_get_platdata(&pdev->dev))
+		kfree(pdata);
+
 	return error;
 }
 
 static int __devexit gpio_keys_polled_remove(struct platform_device *pdev)
 {
 	struct gpio_keys_polled_dev *bdev = platform_get_drvdata(pdev);
-	struct gpio_keys_platform_data *pdata = bdev->pdata;
+	const struct gpio_keys_platform_data *pdata = bdev->pdata;
 	int i;
 
 	input_unregister_polled_device(bdev->poll_dev);
@@ -227,6 +342,13 @@ static int __devexit gpio_keys_polled_remove(struct platform_device *pdev)
 
 	input_free_polled_device(bdev->poll_dev);
 
+	/*
+	 * If we had no platform_data, we allocated pdata dynamically and
+	 * must free it here.
+	 */
+	if (!dev_get_platdata(&pdev->dev))
+		kfree(pdata);
+
 	kfree(bdev);
 	platform_set_drvdata(pdev, NULL);
 
@@ -239,6 +361,7 @@ static struct platform_driver gpio_keys_polled_driver = {
 	.driver	= {
 		.name	= DRV_NAME,
 		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(gpio_keys_polled_of_match),
 	},
 };
 module_platform_driver(gpio_keys_polled_driver);
diff --git a/drivers/input/keyboard/omap-keypad.c b/drivers/input/keyboard/omap-keypad.c
index 6d6b1427ae1..4a5fcc8026f 100644
--- a/drivers/input/keyboard/omap-keypad.c
+++ b/drivers/input/keyboard/omap-keypad.c
@@ -179,7 +179,7 @@ static void omap_kp_tasklet(unsigned long data)
 	memcpy(keypad_state, new_state, sizeof(keypad_state));
 
 	if (key_down) {
-                int delay = HZ / 20;
+		int delay = HZ / 20;
 		/* some key is pressed - keep irq disabled and use timer
 		 * to poll the keypad */
 		if (spurious)
@@ -346,9 +346,9 @@ err4:
 err3:
 	device_remove_file(&pdev->dev, &dev_attr_enable);
 err2:
-	for (i = row_idx - 1; i >=0; i--)
+	for (i = row_idx - 1; i >= 0; i--)
 		gpio_free(row_gpios[i]);
-	for (i = col_idx - 1; i >=0; i--)
+	for (i = col_idx - 1; i >= 0; i--)
 		gpio_free(col_gpios[i]);
 
 	kfree(omap_kp);
diff --git a/drivers/input/keyboard/samsung-keypad.c b/drivers/input/keyboard/samsung-keypad.c
index a061ba603a2..277e26dc910 100644
--- a/drivers/input/keyboard/samsung-keypad.c
+++ b/drivers/input/keyboard/samsung-keypad.c
@@ -256,7 +256,7 @@ static struct samsung_keypad_platdata *samsung_keypad_parse_dt(
 	struct matrix_keymap_data *keymap_data;
 	uint32_t *keymap, num_rows = 0, num_cols = 0;
 	struct device_node *np = dev->of_node, *key_np;
-	unsigned int key_count = 0;
+	unsigned int key_count;
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata) {
@@ -280,9 +280,7 @@ static struct samsung_keypad_platdata *samsung_keypad_parse_dt(
 	}
 	pdata->keymap_data = keymap_data;
 
-	for_each_child_of_node(np, key_np)
-		key_count++;
-
+	key_count = of_get_child_count(np);
 	keymap_data->keymap_size = key_count;
 	keymap = devm_kzalloc(dev, sizeof(uint32_t) * key_count, GFP_KERNEL);
 	if (!keymap) {
@@ -662,8 +660,6 @@ static const struct of_device_id samsung_keypad_dt_match[] = {
 	{},
 };
 MODULE_DEVICE_TABLE(of, samsung_keypad_dt_match);
-#else
-#define samsung_keypad_dt_match NULL
 #endif
 
 static struct platform_device_id samsung_keypad_driver_ids[] = {
@@ -684,7 +680,7 @@ static struct platform_driver samsung_keypad_driver = {
 	.driver		= {
 		.name	= "samsung-keypad",
 		.owner	= THIS_MODULE,
-		.of_match_table = samsung_keypad_dt_match,
+		.of_match_table = of_match_ptr(samsung_keypad_dt_match),
 		.pm	= &samsung_keypad_pm_ops,
 	},
 	.id_table	= samsung_keypad_driver_ids,
diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index 2c1c9ed1bd9..5faaf2553e3 100644
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -29,8 +29,8 @@
 #include <linux/of.h>
 #include <linux/clk.h>
 #include <linux/slab.h>
+#include <linux/input/tegra_kbc.h>
 #include <mach/clk.h>
-#include <mach/kbc.h>
 
 #define KBC_MAX_DEBOUNCE_CNT	0x3ffu
 
diff --git a/drivers/input/misc/rotary_encoder.c b/drivers/input/misc/rotary_encoder.c
index f07f784198b..99a49e4968d 100644
--- a/drivers/input/misc/rotary_encoder.c
+++ b/drivers/input/misc/rotary_encoder.c
@@ -24,12 +24,14 @@
 #include <linux/gpio.h>
 #include <linux/rotary_encoder.h>
 #include <linux/slab.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
 
 #define DRV_NAME "rotary-encoder"
 
 struct rotary_encoder {
 	struct input_dev *input;
-	struct rotary_encoder_platform_data *pdata;
+	const struct rotary_encoder_platform_data *pdata;
 
 	unsigned int axis;
 	unsigned int pos;
@@ -43,7 +45,7 @@ struct rotary_encoder {
 	char last_stable;
 };
 
-static int rotary_encoder_get_state(struct rotary_encoder_platform_data *pdata)
+static int rotary_encoder_get_state(const struct rotary_encoder_platform_data *pdata)
 {
 	int a = !!gpio_get_value(pdata->gpio_a);
 	int b = !!gpio_get_value(pdata->gpio_b);
@@ -56,7 +58,7 @@ static int rotary_encoder_get_state(struct rotary_encoder_platform_data *pdata)
 
 static void rotary_encoder_report_event(struct rotary_encoder *encoder)
 {
-	struct rotary_encoder_platform_data *pdata = encoder->pdata;
+	const struct rotary_encoder_platform_data *pdata = encoder->pdata;
 
 	if (pdata->relative_axis) {
 		input_report_rel(encoder->input,
@@ -140,36 +142,89 @@ static irqreturn_t rotary_encoder_half_period_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
+#ifdef CONFIG_OF
+static struct of_device_id rotary_encoder_of_match[] = {
+	{ .compatible = "rotary-encoder", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, rotary_encoder_of_match);
+
+static struct rotary_encoder_platform_data * __devinit
+rotary_encoder_parse_dt(struct device *dev)
+{
+	const struct of_device_id *of_id =
+				of_match_device(rotary_encoder_of_match, dev);
+	struct device_node *np = dev->of_node;
+	struct rotary_encoder_platform_data *pdata;
+	enum of_gpio_flags flags;
+
+	if (!of_id || !np)
+		return NULL;
+
+	pdata = kzalloc(sizeof(struct rotary_encoder_platform_data),
+			GFP_KERNEL);
+	if (!pdata)
+		return ERR_PTR(-ENOMEM);
+
+	of_property_read_u32(np, "rotary-encoder,steps", &pdata->steps);
+	of_property_read_u32(np, "linux,axis", &pdata->axis);
+
+	pdata->gpio_a = of_get_gpio_flags(np, 0, &flags);
+	pdata->inverted_a = flags & OF_GPIO_ACTIVE_LOW;
+
+	pdata->gpio_b = of_get_gpio_flags(np, 1, &flags);
+	pdata->inverted_b = flags & OF_GPIO_ACTIVE_LOW;
+
+	pdata->relative_axis = !!of_get_property(np,
+					"rotary-encoder,relative-axis", NULL);
+	pdata->rollover = !!of_get_property(np,
+					"rotary-encoder,rollover", NULL);
+	pdata->half_period = !!of_get_property(np,
+					"rotary-encoder,half-period", NULL);
+
+	return pdata;
+}
+#else
+static inline struct rotary_encoder_platform_data *
+rotary_encoder_parse_dt(struct device *dev)
+{
+	return NULL;
+}
+#endif
+
 static int __devinit rotary_encoder_probe(struct platform_device *pdev)
 {
-	struct rotary_encoder_platform_data *pdata = pdev->dev.platform_data;
+	struct device *dev = &pdev->dev;
+	const struct rotary_encoder_platform_data *pdata = dev_get_platdata(dev);
 	struct rotary_encoder *encoder;
 	struct input_dev *input;
 	irq_handler_t handler;
 	int err;
 
 	if (!pdata) {
-		dev_err(&pdev->dev, "missing platform data\n");
-		return -ENOENT;
+		pdata = rotary_encoder_parse_dt(dev);
+		if (IS_ERR(pdata))
+			return PTR_ERR(pdata);
+
+		if (!pdata) {
+			dev_err(dev, "missing platform data\n");
+			return -EINVAL;
+		}
 	}
 
 	encoder = kzalloc(sizeof(struct rotary_encoder), GFP_KERNEL);
 	input = input_allocate_device();
 	if (!encoder || !input) {
-		dev_err(&pdev->dev, "failed to allocate memory for device\n");
 		err = -ENOMEM;
 		goto exit_free_mem;
 	}
 
 	encoder->input = input;
 	encoder->pdata = pdata;
-	encoder->irq_a = gpio_to_irq(pdata->gpio_a);
-	encoder->irq_b = gpio_to_irq(pdata->gpio_b);
 
-	/* create and register the input driver */
 	input->name = pdev->name;
 	input->id.bustype = BUS_HOST;
-	input->dev.parent = &pdev->dev;
+	input->dev.parent = dev;
 
 	if (pdata->relative_axis) {
 		input->evbit[0] = BIT_MASK(EV_REL);
@@ -180,40 +235,21 @@ static int __devinit rotary_encoder_probe(struct platform_device *pdev)
 				     pdata->axis, 0, pdata->steps, 0, 1);
 	}
 
-	err = input_register_device(input);
-	if (err) {
-		dev_err(&pdev->dev, "failed to register input device\n");
-		goto exit_free_mem;
-	}
-
 	/* request the GPIOs */
-	err = gpio_request(pdata->gpio_a, DRV_NAME);
-	if (err) {
-		dev_err(&pdev->dev, "unable to request GPIO %d\n",
-			pdata->gpio_a);
-		goto exit_unregister_input;
-	}
-
-	err = gpio_direction_input(pdata->gpio_a);
+	err = gpio_request_one(pdata->gpio_a, GPIOF_IN, dev_name(dev));
 	if (err) {
-		dev_err(&pdev->dev, "unable to set GPIO %d for input\n",
-			pdata->gpio_a);
-		goto exit_unregister_input;
+		dev_err(dev, "unable to request GPIO %d\n", pdata->gpio_a);
+		goto exit_free_mem;
 	}
 
-	err = gpio_request(pdata->gpio_b, DRV_NAME);
+	err = gpio_request_one(pdata->gpio_b, GPIOF_IN, dev_name(dev));
 	if (err) {
-		dev_err(&pdev->dev, "unable to request GPIO %d\n",
-			pdata->gpio_b);
+		dev_err(dev, "unable to request GPIO %d\n", pdata->gpio_b);
 		goto exit_free_gpio_a;
 	}
 
-	err = gpio_direction_input(pdata->gpio_b);
-	if (err) {
-		dev_err(&pdev->dev, "unable to set GPIO %d for input\n",
-			pdata->gpio_b);
-		goto exit_free_gpio_a;
-	}
+	encoder->irq_a = gpio_to_irq(pdata->gpio_a);
+	encoder->irq_b = gpio_to_irq(pdata->gpio_b);
 
 	/* request the IRQs */
 	if (pdata->half_period) {
@@ -227,8 +263,7 @@ static int __devinit rotary_encoder_probe(struct platform_device *pdev)
 			  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 			  DRV_NAME, encoder);
 	if (err) {
-		dev_err(&pdev->dev, "unable to request IRQ %d\n",
-			encoder->irq_a);
+		dev_err(dev, "unable to request IRQ %d\n", encoder->irq_a);
 		goto exit_free_gpio_b;
 	}
 
@@ -236,43 +271,55 @@ static int __devinit rotary_encoder_probe(struct platform_device *pdev)
 			  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 			  DRV_NAME, encoder);
 	if (err) {
-		dev_err(&pdev->dev, "unable to request IRQ %d\n",
-			encoder->irq_b);
+		dev_err(dev, "unable to request IRQ %d\n", encoder->irq_b);
 		goto exit_free_irq_a;
 	}
 
+	err = input_register_device(input);
+	if (err) {
+		dev_err(dev, "failed to register input device\n");
+		goto exit_free_irq_b;
+	}
+
 	platform_set_drvdata(pdev, encoder);
 
 	return 0;
 
+exit_free_irq_b:
+	free_irq(encoder->irq_b, encoder);
 exit_free_irq_a:
 	free_irq(encoder->irq_a, encoder);
 exit_free_gpio_b:
 	gpio_free(pdata->gpio_b);
 exit_free_gpio_a:
 	gpio_free(pdata->gpio_a);
-exit_unregister_input:
-	input_unregister_device(input);
-	input = NULL; /* so we don't try to free it */
 exit_free_mem:
 	input_free_device(input);
 	kfree(encoder);
+	if (!dev_get_platdata(&pdev->dev))
+		kfree(pdata);
+
 	return err;
 }
 
 static int __devexit rotary_encoder_remove(struct platform_device *pdev)
 {
 	struct rotary_encoder *encoder = platform_get_drvdata(pdev);
-	struct rotary_encoder_platform_data *pdata = pdev->dev.platform_data;
+	const struct rotary_encoder_platform_data *pdata = encoder->pdata;
 
 	free_irq(encoder->irq_a, encoder);
 	free_irq(encoder->irq_b, encoder);
 	gpio_free(pdata->gpio_a);
 	gpio_free(pdata->gpio_b);
+
 	input_unregister_device(encoder->input);
-	platform_set_drvdata(pdev, NULL);
 	kfree(encoder);
 
+	if (!dev_get_platdata(&pdev->dev))
+		kfree(pdata);
+
+	platform_set_drvdata(pdev, NULL);
+
 	return 0;
 }
 
@@ -282,6 +329,7 @@ static struct platform_driver rotary_encoder_driver = {
 	.driver		= {
 		.name	= DRV_NAME,
 		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(rotary_encoder_of_match),
 	}
 };
 module_platform_driver(rotary_encoder_driver);
diff --git a/drivers/input/misc/twl4030-pwrbutton.c b/drivers/input/misc/twl4030-pwrbutton.c
index 38e4b507b94..b3dd96d6448 100644
--- a/drivers/input/misc/twl4030-pwrbutton.c
+++ b/drivers/input/misc/twl4030-pwrbutton.c
@@ -42,6 +42,7 @@ static irqreturn_t powerbutton_irq(int irq, void *_pwr)
 	err = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &value,
 				STS_HW_CONDITIONS);
 	if (!err)  {
+		pm_wakeup_event(pwr->dev.parent, 0);
 		input_report_key(pwr, KEY_POWER, value & PWR_PWRON_IRQ);
 		input_sync(pwr);
 	} else {
diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 6b1797503e3..a0a4bbaef02 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -40,7 +40,8 @@
 #include <linux/input/mt.h>
 #include "../input-compat.h"
 
-static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
+static int uinput_dev_event(struct input_dev *dev,
+			    unsigned int type, unsigned int code, int value)
 {
 	struct uinput_device	*udev = input_get_drvdata(dev);
 
@@ -56,10 +57,11 @@ static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned i
 }
 
 /* Atomically allocate an ID for the given request. Returns 0 on success. */
-static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_request *request)
+static bool uinput_request_alloc_id(struct uinput_device *udev,
+				    struct uinput_request *request)
 {
-	int id;
-	int err = -1;
+	unsigned int id;
+	bool reserved = false;
 
 	spin_lock(&udev->requests_lock);
 
@@ -67,32 +69,35 @@ static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_req
 		if (!udev->requests[id]) {
 			request->id = id;
 			udev->requests[id] = request;
-			err = 0;
+			reserved = true;
 			break;
 		}
 	}
 
 	spin_unlock(&udev->requests_lock);
-	return err;
+	return reserved;
 }
 
-static struct uinput_request *uinput_request_find(struct uinput_device *udev, int id)
+static struct uinput_request *uinput_request_find(struct uinput_device *udev,
+						  unsigned int id)
 {
 	/* Find an input request, by ID. Returns NULL if the ID isn't valid. */
-	if (id >= UINPUT_NUM_REQUESTS || id < 0)
+	if (id >= UINPUT_NUM_REQUESTS)
 		return NULL;
 
 	return udev->requests[id];
 }
 
-static inline int uinput_request_reserve_slot(struct uinput_device *udev, struct uinput_request *request)
+static int uinput_request_reserve_slot(struct uinput_device *udev,
+				       struct uinput_request *request)
 {
 	/* Allocate slot. If none are available right away, wait. */
 	return wait_event_interruptible(udev->requests_waitq,
-					!uinput_request_alloc_id(udev, request));
+					uinput_request_alloc_id(udev, request));
 }
 
-static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request)
+static void uinput_request_done(struct uinput_device *udev,
+				struct uinput_request *request)
 {
 	/* Mark slot as available */
 	udev->requests[request->id] = NULL;
@@ -101,14 +106,11 @@ static void uinput_request_done(struct uinput_device *udev, struct uinput_reques
 	complete(&request->done);
 }
 
-static int uinput_request_submit(struct uinput_device *udev, struct uinput_request *request)
+static int uinput_request_send(struct uinput_device *udev,
+			       struct uinput_request *request)
 {
 	int retval;
 
-	retval = uinput_request_reserve_slot(udev, request);
-	if (retval)
-		return retval;
-
 	retval = mutex_lock_interruptible(&udev->mutex);
 	if (retval)
 		return retval;
@@ -118,7 +120,12 @@ static int uinput_request_submit(struct uinput_device *udev, struct uinput_reque
 		goto out;
 	}
 
-	/* Tell our userspace app about this new request by queueing an input event */
+	init_completion(&request->done);
+
+	/*
+	 * Tell our userspace application about this new request
+	 * by queueing an input event.
+	 */
 	uinput_dev_event(udev->dev, EV_UINPUT, request->code, request->id);
 
  out:
@@ -126,8 +133,27 @@ static int uinput_request_submit(struct uinput_device *udev, struct uinput_reque
 	return retval;
 }
 
+static int uinput_request_submit(struct uinput_device *udev,
+				 struct uinput_request *request)
+{
+	int error;
+
+	error = uinput_request_reserve_slot(udev, request);
+	if (error)
+		return error;
+
+	error = uinput_request_send(udev, request);
+	if (error) {
+		uinput_request_done(udev, request);
+		return error;
+	}
+
+	wait_for_completion(&request->done);
+	return request->retval;
+}
+
 /*
- * Fail all ouitstanding requests so handlers don't wait for the userspace
+ * Fail all outstanding requests so handlers don't wait for the userspace
  * to finish processing them.
  */
 static void uinput_flush_requests(struct uinput_device *udev)
@@ -163,11 +189,12 @@ static int uinput_dev_playback(struct input_dev *dev, int effect_id, int value)
 	return uinput_dev_event(dev, EV_FF, effect_id, value);
 }
 
-static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old)
+static int uinput_dev_upload_effect(struct input_dev *dev,
+				    struct ff_effect *effect,
+				    struct ff_effect *old)
 {
 	struct uinput_device *udev = input_get_drvdata(dev);
 	struct uinput_request request;
-	int retval;
 
 	/*
 	 * uinput driver does not currently support periodic effects with
@@ -180,42 +207,25 @@ static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *eff
 			effect->u.periodic.waveform == FF_CUSTOM)
 		return -EINVAL;
 
-	request.id = -1;
-	init_completion(&request.done);
 	request.code = UI_FF_UPLOAD;
 	request.u.upload.effect = effect;
 	request.u.upload.old = old;
 
-	retval = uinput_request_submit(udev, &request);
-	if (!retval) {
-		wait_for_completion(&request.done);
-		retval = request.retval;
-	}
-
-	return retval;
+	return uinput_request_submit(udev, &request);
 }
 
 static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id)
 {
 	struct uinput_device *udev = input_get_drvdata(dev);
 	struct uinput_request request;
-	int retval;
 
 	if (!test_bit(EV_FF, dev->evbit))
 		return -ENOSYS;
 
-	request.id = -1;
-	init_completion(&request.done);
 	request.code = UI_FF_ERASE;
 	request.u.effect_id = effect_id;
 
-	retval = uinput_request_submit(udev, &request);
-	if (!retval) {
-		wait_for_completion(&request.done);
-		retval = request.retval;
-	}
-
-	return retval;
+	return uinput_request_submit(udev, &request);
 }
 
 static void uinput_destroy_device(struct uinput_device *udev)
@@ -347,7 +357,8 @@ static int uinput_allocate_device(struct uinput_device *udev)
 	return 0;
 }
 
-static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count)
+static int uinput_setup_device(struct uinput_device *udev,
+			       const char __user *buffer, size_t count)
 {
 	struct uinput_user_dev	*user_dev;
 	struct input_dev	*dev;
@@ -419,7 +430,8 @@ static int uinput_setup_device(struct uinput_device *udev, const char __user *bu
 	return retval;
 }
 
-static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count)
+static ssize_t uinput_inject_event(struct uinput_device *udev,
+				   const char __user *buffer, size_t count)
 {
 	struct input_event ev;
 
@@ -434,11 +446,15 @@ static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char
 	return input_event_size();
 }
 
-static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
+static ssize_t uinput_write(struct file *file, const char __user *buffer,
+			    size_t count, loff_t *ppos)
 {
 	struct uinput_device *udev = file->private_data;
 	int retval;
 
+	if (count == 0)
+		return 0;
+
 	retval = mutex_lock_interruptible(&udev->mutex);
 	if (retval)
 		return retval;
@@ -452,42 +468,74 @@ static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t
 	return retval;
 }
 
-static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
+static bool uinput_fetch_next_event(struct uinput_device *udev,
+				    struct input_event *event)
 {
-	struct uinput_device *udev = file->private_data;
-	int retval = 0;
+	bool have_event;
 
-	if (udev->state != UIST_CREATED)
-		return -ENODEV;
+	spin_lock_irq(&udev->dev->event_lock);
 
-	if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK))
-		return -EAGAIN;
+	have_event = udev->head != udev->tail;
+	if (have_event) {
+		*event = udev->buff[udev->tail];
+		udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE;
+	}
 
-	retval = wait_event_interruptible(udev->waitq,
-			udev->head != udev->tail || udev->state != UIST_CREATED);
-	if (retval)
-		return retval;
+	spin_unlock_irq(&udev->dev->event_lock);
 
-	retval = mutex_lock_interruptible(&udev->mutex);
-	if (retval)
-		return retval;
+	return have_event;
+}
 
-	if (udev->state != UIST_CREATED) {
-		retval = -ENODEV;
-		goto out;
-	}
+static ssize_t uinput_events_to_user(struct uinput_device *udev,
+				     char __user *buffer, size_t count)
+{
+	struct input_event event;
+	size_t read = 0;
 
-	while (udev->head != udev->tail && retval + input_event_size() <= count) {
-		if (input_event_to_user(buffer + retval, &udev->buff[udev->tail])) {
-			retval = -EFAULT;
-			goto out;
-		}
-		udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE;
-		retval += input_event_size();
+	while (read + input_event_size() <= count &&
+	       uinput_fetch_next_event(udev, &event)) {
+
+		if (input_event_to_user(buffer + read, &event))
+			return -EFAULT;
+
+		read += input_event_size();
 	}
 
- out:
-	mutex_unlock(&udev->mutex);
+	return read;
+}
+
+static ssize_t uinput_read(struct file *file, char __user *buffer,
+			   size_t count, loff_t *ppos)
+{
+	struct uinput_device *udev = file->private_data;
+	ssize_t retval;
+
+	if (count != 0 && count < input_event_size())
+		return -EINVAL;
+
+	do {
+		retval = mutex_lock_interruptible(&udev->mutex);
+		if (retval)
+			return retval;
+
+		if (udev->state != UIST_CREATED)
+			retval = -ENODEV;
+		else if (udev->head == udev->tail &&
+			 (file->f_flags & O_NONBLOCK))
+			retval = -EAGAIN;
+		else
+			retval = uinput_events_to_user(udev, buffer, count);
+
+		mutex_unlock(&udev->mutex);
+
+		if (retval || count == 0)
+			break;
+
+		if (!(file->f_flags & O_NONBLOCK))
+			retval = wait_event_interruptible(udev->waitq,
+						  udev->head != udev->tail ||
+						  udev->state != UIST_CREATED);
+	} while (retval == 0);
 
 	return retval;
 }
@@ -516,8 +564,8 @@ static int uinput_release(struct inode *inode, struct file *file)
 
 #ifdef CONFIG_COMPAT
 struct uinput_ff_upload_compat {
-	int			request_id;
-	int			retval;
+	__u32			request_id;
+	__s32			retval;
 	struct ff_effect_compat	effect;
 	struct ff_effect_compat	old;
 };
@@ -703,7 +751,8 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd,
 				break;
 
 			req = uinput_request_find(udev, ff_up.request_id);
-			if (!req || req->code != UI_FF_UPLOAD || !req->u.upload.effect) {
+			if (!req || req->code != UI_FF_UPLOAD ||
+			    !req->u.upload.effect) {
 				retval = -EINVAL;
 				break;
 			}
@@ -786,7 +835,8 @@ static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 }
 
 #ifdef CONFIG_COMPAT
-static long uinput_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+static long uinput_compat_ioctl(struct file *file,
+				unsigned int cmd, unsigned long arg)
 {
 	return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg));
 }
@@ -831,4 +881,3 @@ MODULE_VERSION("0.3");
 
 module_init(uinput_init);
 module_exit(uinput_exit);
-
diff --git a/drivers/input/mouse/hgpk.c b/drivers/input/mouse/hgpk.c
index 575f880727f..62be888e83d 100644
--- a/drivers/input/mouse/hgpk.c
+++ b/drivers/input/mouse/hgpk.c
@@ -334,11 +334,8 @@ static bool hgpk_is_byte_valid(struct psmouse *psmouse, unsigned char *packet)
 
 	if (!valid)
 		psmouse_dbg(psmouse,
-			    "bad data, mode %d (%d) %02x %02x %02x %02x %02x %02x\n",
-			    priv->mode, pktcnt,
-			    psmouse->packet[0], psmouse->packet[1],
-			    psmouse->packet[2], psmouse->packet[3],
-			    psmouse->packet[4], psmouse->packet[5]);
+			    "bad data, mode %d (%d) %*ph\n",
+			    priv->mode, pktcnt, 6, psmouse->packet);
 
 	return valid;
 }
@@ -1030,7 +1027,7 @@ static enum hgpk_model_t hgpk_get_model(struct psmouse *psmouse)
 		return -EIO;
 	}
 
-	psmouse_dbg(psmouse, "ID: %02x %02x %02x\n", param[0], param[1], param[2]);
+	psmouse_dbg(psmouse, "ID: %*ph\n", 3, param);
 
 	/* HGPK signature: 0x67, 0x00, 0x<model> */
 	if (param[0] != 0x67 || param[1] != 0x00)
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 37033ade79d..12d12ca3fee 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -53,14 +53,19 @@
 #define ABS_POS_BITS 13
 
 /*
- * Any position values from the hardware above the following limits are
- * treated as "wrapped around negative" values that have been truncated to
- * the 13-bit reporting range of the hardware. These are just reasonable
- * guesses and can be adjusted if hardware is found that operates outside
- * of these parameters.
+ * These values should represent the absolute maximum value that will
+ * be reported for a positive position value. Some Synaptics firmware
+ * uses this value to indicate a finger near the edge of the touchpad
+ * whose precise position cannot be determined.
+ *
+ * At least one touchpad is known to report positions in excess of this
+ * value which are actually negative values truncated to the 13-bit
+ * reporting range. These values have never been observed to be lower
+ * than 8184 (i.e. -8), so we treat all values greater than 8176 as
+ * negative and any other value as positive.
  */
-#define X_MAX_POSITIVE (((1 << ABS_POS_BITS) + XMAX) / 2)
-#define Y_MAX_POSITIVE (((1 << ABS_POS_BITS) + YMAX) / 2)
+#define X_MAX_POSITIVE 8176
+#define Y_MAX_POSITIVE 8176
 
 /*****************************************************************************
  *	Stuff we need even when we do not want native Synaptics support
@@ -604,11 +609,21 @@ static int synaptics_parse_hw_state(const unsigned char buf[],
 		hw->right = (buf[0] & 0x02) ? 1 : 0;
 	}
 
-	/* Convert wrap-around values to negative */
+	/*
+	 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
+	 * is used by some firmware to indicate a finger at the edge of
+	 * the touchpad whose precise position cannot be determined, so
+	 * convert these values to the maximum axis value.
+	 */
 	if (hw->x > X_MAX_POSITIVE)
 		hw->x -= 1 << ABS_POS_BITS;
+	else if (hw->x == X_MAX_POSITIVE)
+		hw->x = XMAX;
+
 	if (hw->y > Y_MAX_POSITIVE)
 		hw->y -= 1 << ABS_POS_BITS;
+	else if (hw->y == Y_MAX_POSITIVE)
+		hw->y = YMAX;
 
 	return 0;
 }
diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c
index 0110b5a3a16..964e43d81e2 100644
--- a/drivers/input/mousedev.c
+++ b/drivers/input/mousedev.c
@@ -551,17 +551,16 @@ static int mousedev_open(struct inode *inode, struct file *file)
 		return -ENODEV;
 
 	error = mutex_lock_interruptible(&mousedev_table_mutex);
-	if (error) {
+	if (error)
 		return error;
-	}
+
 	mousedev = mousedev_table[i];
 	if (mousedev)
 		get_device(&mousedev->dev);
 	mutex_unlock(&mousedev_table_mutex);
 
-	if (!mousedev) {
+	if (!mousedev)
 		return -ENODEV;
-	}
 
 	client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL);
 	if (!client) {
@@ -1088,7 +1087,7 @@ static int __init mousedev_init(void)
 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 	error = misc_register(&psaux_mouse);
 	if (error)
-		pr_warning("could not register psaux device, error: %d\n",
+		pr_warn("could not register psaux device, error: %d\n",
 			   error);
 	else
 		psaux_registered = 1;
diff --git a/drivers/input/sparse-keymap.c b/drivers/input/sparse-keymap.c
index 75fb040a343..a70aa555bbf 100644
--- a/drivers/input/sparse-keymap.c
+++ b/drivers/input/sparse-keymap.c
@@ -180,11 +180,11 @@ int sparse_keymap_setup(struct input_dev *dev,
 	for (e = keymap; e->type != KE_END; e++)
 		map_size++;
 
-	map = kcalloc(map_size, sizeof (struct key_entry), GFP_KERNEL);
+	map = kcalloc(map_size, sizeof(struct key_entry), GFP_KERNEL);
 	if (!map)
 		return -ENOMEM;
 
-	memcpy(map, keymap, map_size * sizeof (struct key_entry));
+	memcpy(map, keymap, map_size * sizeof(struct key_entry));
 
 	for (i = 0; i < map_size; i++) {
 		entry = &map[i];
diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 2a81ce375f7..08b462b6c0d 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -606,7 +606,7 @@ static int wacom_intuos_irq(struct wacom_wac *wacom)
 				input_report_abs(input, ABS_WHEEL, 0);
 			}
 
-			if (data[2] | (data[3] & 0x01) | data[4]) {
+			if (data[2] | (data[3] & 0x01) | data[4] | data[5]) {
 				input_report_key(input, wacom->tool[1], 1);
 				input_report_abs(input, ABS_MISC, PAD_DEVICE_ID);
 			} else {
diff --git a/drivers/input/touchscreen/s3c2410_ts.c b/drivers/input/touchscreen/s3c2410_ts.c
index df9e816d55e..549fa29548f 100644
--- a/drivers/input/touchscreen/s3c2410_ts.c
+++ b/drivers/input/touchscreen/s3c2410_ts.c
@@ -406,7 +406,7 @@ static int s3c2410ts_resume(struct device *dev)
 	return 0;
 }
 
-static struct dev_pm_ops s3c_ts_pmops = {
+static const struct dev_pm_ops s3c_ts_pmops = {
 	.suspend	= s3c2410ts_suspend,
 	.resume		= s3c2410ts_resume,
 };