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

Pull input updates from Dmitry Torokhov:

 - input core allows hardware drivers to specify a [more precise]
   timestamp (normally taken in top half) to better track velocity of
   contacts

 - input_dev instances now support "polling" mode so that drivers could
   use the same object for polled and interrupt-driven operation. The
   plan is to convert existing drivers and retire input_polled_dev API

 - a new driver for the FlySky FS-iA6B RC receiver

 - a refresh of BU21013 touchpad driver

 - w90x900 keyboard and touchpad drivers are removed as the platform is
   gone

 - assorted fixes

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (45 commits)
  Input: sidewinder - make array seq static const, makes object smaller
  Input: reset device timestamp on sync
  Input: bu21013_ts - switch to using standard touchscreen properties
  Input: bu21013_ts - switch to using MT-B (slotted) protocol
  Input: bu21013_ts - fix suspend when wake source
  Input: bu21013_ts - use interrupt from I2C client
  Input: bu21013_ts - remove support for platform data
  Input: bu21013_ts - convert to using managed resources
  Input: bu21013_ts - remove useless comments
  Input: bu21013_ts - annotate supend/resume methods as __maybe_unused
  Input: bu21013_ts - rename some variables
  Input: bu21013_ts - convert to use GPIO descriptors
  ARM: ux500: improve BU21013 touchpad bindings
  Input: i8042 - enable wakeup on a stable struct device
  Input: soc_button_array - use platform_device_register_resndata()
  Input: psmouse - drop all unneeded functions from mouse headers
  Input: add support for polling to input devices
  Input: wacom_w8001 - allocate additional space for 'phys'
  Input: cros_ec_keyb - add back missing mask for event_type
  Input: remove dev_err() usage after platform_get_irq()
  ...

85 files changed, 1161 insertions, 1487 deletions

diff --git a/drivers/input/Makefile b/drivers/input/Makefile
index 40de6a7be641..e35650930371 100644
--- a/drivers/input/Makefile
+++ b/drivers/input/Makefile
@@ -6,7 +6,7 @@
 # Each configuration option enables a list of files.
 
 obj-$(CONFIG_INPUT)		+= input-core.o
-input-core-y := input.o input-compat.o input-mt.o ff-core.o
+input-core-y := input.o input-compat.o input-mt.o input-poller.o ff-core.o
 
 obj-$(CONFIG_INPUT_FF_MEMLESS)	+= ff-memless.o
 obj-$(CONFIG_INPUT_POLLDEV)	+= input-polldev.o
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 867c2cfd0038..d7dd6fcf2db0 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -25,13 +25,6 @@
 #include <linux/cdev.h>
 #include "input-compat.h"
 
-enum evdev_clock_type {
-	EV_CLK_REAL = 0,
-	EV_CLK_MONO,
-	EV_CLK_BOOT,
-	EV_CLK_MAX
-};
-
 struct evdev {
 	int open;
 	struct input_handle handle;
@@ -53,7 +46,7 @@ struct evdev_client {
 	struct fasync_struct *fasync;
 	struct evdev *evdev;
 	struct list_head node;
-	unsigned int clk_type;
+	enum input_clock_type clk_type;
 	bool revoked;
 	unsigned long *evmasks[EV_CNT];
 	unsigned int bufsize;
@@ -149,17 +142,10 @@ static void __evdev_flush_queue(struct evdev_client *client, unsigned int type)
 
 static void __evdev_queue_syn_dropped(struct evdev_client *client)
 {
+	ktime_t *ev_time = input_get_timestamp(client->evdev->handle.dev);
+	struct timespec64 ts = ktime_to_timespec64(ev_time[client->clk_type]);
 	struct input_event ev;
-	ktime_t time;
-	struct timespec64 ts;
 
-	time = client->clk_type == EV_CLK_REAL ?
-			ktime_get_real() :
-			client->clk_type == EV_CLK_MONO ?
-				ktime_get() :
-				ktime_get_boottime();
-
-	ts = ktime_to_timespec64(time);
 	ev.input_event_sec = ts.tv_sec;
 	ev.input_event_usec = ts.tv_nsec / NSEC_PER_USEC;
 	ev.type = EV_SYN;
@@ -188,18 +174,18 @@ static void evdev_queue_syn_dropped(struct evdev_client *client)
 static int evdev_set_clk_type(struct evdev_client *client, unsigned int clkid)
 {
 	unsigned long flags;
-	unsigned int clk_type;
+	enum input_clock_type clk_type;
 
 	switch (clkid) {
 
 	case CLOCK_REALTIME:
-		clk_type = EV_CLK_REAL;
+		clk_type = INPUT_CLK_REAL;
 		break;
 	case CLOCK_MONOTONIC:
-		clk_type = EV_CLK_MONO;
+		clk_type = INPUT_CLK_MONO;
 		break;
 	case CLOCK_BOOTTIME:
-		clk_type = EV_CLK_BOOT;
+		clk_type = INPUT_CLK_BOOT;
 		break;
 	default:
 		return -EINVAL;
@@ -307,12 +293,7 @@ static void evdev_events(struct input_handle *handle,
 {
 	struct evdev *evdev = handle->private;
 	struct evdev_client *client;
-	ktime_t ev_time[EV_CLK_MAX];
-
-	ev_time[EV_CLK_MONO] = ktime_get();
-	ev_time[EV_CLK_REAL] = ktime_mono_to_real(ev_time[EV_CLK_MONO]);
-	ev_time[EV_CLK_BOOT] = ktime_mono_to_any(ev_time[EV_CLK_MONO],
-						 TK_OFFS_BOOT);
+	ktime_t *ev_time = input_get_timestamp(handle->dev);
 
 	rcu_read_lock();
 
diff --git a/drivers/input/input-poller.c b/drivers/input/input-poller.c
new file mode 100644
index 000000000000..1b3d28964bb2
--- /dev/null
+++ b/drivers/input/input-poller.c
@@ -0,0 +1,213 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Support for polling mode for input devices.
+ */
+
+#include <linux/device.h>
+#include <linux/input.h>
+#include <linux/jiffies.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/workqueue.h>
+#include "input-poller.h"
+
+struct input_dev_poller {
+	void (*poll)(struct input_dev *dev);
+
+	unsigned int poll_interval; /* msec */
+	unsigned int poll_interval_max; /* msec */
+	unsigned int poll_interval_min; /* msec */
+
+	struct input_dev *input;
+	struct delayed_work work;
+};
+
+static void input_dev_poller_queue_work(struct input_dev_poller *poller)
+{
+	unsigned long delay;
+
+	delay = msecs_to_jiffies(poller->poll_interval);
+	if (delay >= HZ)
+		delay = round_jiffies_relative(delay);
+
+	queue_delayed_work(system_freezable_wq, &poller->work, delay);
+}
+
+static void input_dev_poller_work(struct work_struct *work)
+{
+	struct input_dev_poller *poller =
+		container_of(work, struct input_dev_poller, work.work);
+
+	poller->poll(poller->input);
+	input_dev_poller_queue_work(poller);
+}
+
+void input_dev_poller_finalize(struct input_dev_poller *poller)
+{
+	if (!poller->poll_interval)
+		poller->poll_interval = 500;
+	if (!poller->poll_interval_max)
+		poller->poll_interval_max = poller->poll_interval;
+}
+
+void input_dev_poller_start(struct input_dev_poller *poller)
+{
+	/* Only start polling if polling is enabled */
+	if (poller->poll_interval > 0) {
+		poller->poll(poller->input);
+		input_dev_poller_queue_work(poller);
+	}
+}
+
+void input_dev_poller_stop(struct input_dev_poller *poller)
+{
+	cancel_delayed_work_sync(&poller->work);
+}
+
+int input_setup_polling(struct input_dev *dev,
+			void (*poll_fn)(struct input_dev *dev))
+{
+	struct input_dev_poller *poller;
+
+	poller = kzalloc(sizeof(*poller), GFP_KERNEL);
+	if (!poller) {
+		/*
+		 * We want to show message even though kzalloc() may have
+		 * printed backtrace as knowing what instance of input
+		 * device we were dealing with is helpful.
+		 */
+		dev_err(dev->dev.parent ?: &dev->dev,
+			"%s: unable to allocate poller structure\n", __func__);
+		return -ENOMEM;
+	}
+
+	INIT_DELAYED_WORK(&poller->work, input_dev_poller_work);
+	poller->input = dev;
+	poller->poll = poll_fn;
+
+	dev->poller = poller;
+	return 0;
+}
+EXPORT_SYMBOL(input_setup_polling);
+
+static bool input_dev_ensure_poller(struct input_dev *dev)
+{
+	if (!dev->poller) {
+		dev_err(dev->dev.parent ?: &dev->dev,
+			"poller structure has not been set up\n");
+		return false;
+	}
+
+	return true;
+}
+
+void input_set_poll_interval(struct input_dev *dev, unsigned int interval)
+{
+	if (input_dev_ensure_poller(dev))
+		dev->poller->poll_interval = interval;
+}
+EXPORT_SYMBOL(input_set_poll_interval);
+
+void input_set_min_poll_interval(struct input_dev *dev, unsigned int interval)
+{
+	if (input_dev_ensure_poller(dev))
+		dev->poller->poll_interval_min = interval;
+}
+EXPORT_SYMBOL(input_set_min_poll_interval);
+
+void input_set_max_poll_interval(struct input_dev *dev, unsigned int interval)
+{
+	if (input_dev_ensure_poller(dev))
+		dev->poller->poll_interval_max = interval;
+}
+EXPORT_SYMBOL(input_set_max_poll_interval);
+
+/* SYSFS interface */
+
+static ssize_t input_dev_get_poll_interval(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct input_dev *input = to_input_dev(dev);
+
+	return sprintf(buf, "%d\n", input->poller->poll_interval);
+}
+
+static ssize_t input_dev_set_poll_interval(struct device *dev,
+					   struct device_attribute *attr,
+					   const char *buf, size_t count)
+{
+	struct input_dev *input = to_input_dev(dev);
+	struct input_dev_poller *poller = input->poller;
+	unsigned int interval;
+	int err;
+
+	err = kstrtouint(buf, 0, &interval);
+	if (err)
+		return err;
+
+	if (interval < poller->poll_interval_min)
+		return -EINVAL;
+
+	if (interval > poller->poll_interval_max)
+		return -EINVAL;
+
+	mutex_lock(&input->mutex);
+
+	poller->poll_interval = interval;
+
+	if (input->users) {
+		cancel_delayed_work_sync(&poller->work);
+		if (poller->poll_interval > 0)
+			input_dev_poller_queue_work(poller);
+	}
+
+	mutex_unlock(&input->mutex);
+
+	return count;
+}
+
+static DEVICE_ATTR(poll, 0644,
+		   input_dev_get_poll_interval, input_dev_set_poll_interval);
+
+static ssize_t input_dev_get_poll_max(struct device *dev,
+				      struct device_attribute *attr, char *buf)
+{
+	struct input_dev *input = to_input_dev(dev);
+
+	return sprintf(buf, "%d\n", input->poller->poll_interval_max);
+}
+
+static DEVICE_ATTR(max, 0444, input_dev_get_poll_max, NULL);
+
+static ssize_t input_dev_get_poll_min(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct input_dev *input = to_input_dev(dev);
+
+	return sprintf(buf, "%d\n", input->poller->poll_interval_min);
+}
+
+static DEVICE_ATTR(min, 0444, input_dev_get_poll_min, NULL);
+
+static umode_t input_poller_attrs_visible(struct kobject *kobj,
+					  struct attribute *attr, int n)
+{
+	struct device *dev = kobj_to_dev(kobj);
+	struct input_dev *input = to_input_dev(dev);
+
+	return input->poller ? attr->mode : 0;
+}
+
+static struct attribute *input_poller_attrs[] = {
+	&dev_attr_poll.attr,
+	&dev_attr_max.attr,
+	&dev_attr_min.attr,
+	NULL
+};
+
+struct attribute_group input_poller_attribute_group = {
+	.is_visible	= input_poller_attrs_visible,
+	.attrs		= input_poller_attrs,
+};
diff --git a/drivers/input/input-poller.h b/drivers/input/input-poller.h
new file mode 100644
index 000000000000..e3fca0be1d32
--- /dev/null
+++ b/drivers/input/input-poller.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _INPUT_POLLER_H
+#define _INPUT_POLLER_H
+
+/*
+ * Support for polling mode for input devices.
+ */
+#include <linux/sysfs.h>
+
+struct input_dev_poller;
+
+void input_dev_poller_finalize(struct input_dev_poller *poller);
+void input_dev_poller_start(struct input_dev_poller *poller);
+void input_dev_poller_stop(struct input_dev_poller *poller);
+
+extern struct attribute_group input_poller_attribute_group;
+
+#endif /* _INPUT_POLLER_H */
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 7f3c5fcb9ed6..55086279d044 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -24,6 +24,7 @@
 #include <linux/mutex.h>
 #include <linux/rcupdate.h>
 #include "input-compat.h"
+#include "input-poller.h"
 
 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
 MODULE_DESCRIPTION("Input core");
@@ -396,6 +397,13 @@ static void input_handle_event(struct input_dev *dev,
 		if (dev->num_vals >= 2)
 			input_pass_values(dev, dev->vals, dev->num_vals);
 		dev->num_vals = 0;
+		/*
+		 * Reset the timestamp on flush so we won't end up
+		 * with a stale one. Note we only need to reset the
+		 * monolithic one as we use its presence when deciding
+		 * whether to generate a synthetic timestamp.
+		 */
+		dev->timestamp[INPUT_CLK_MONO] = ktime_set(0, 0);
 	} else if (dev->num_vals >= dev->max_vals - 2) {
 		dev->vals[dev->num_vals++] = input_value_sync;
 		input_pass_values(dev, dev->vals, dev->num_vals);
@@ -603,20 +611,31 @@ int input_open_device(struct input_handle *handle)
 
 	handle->open++;
 
-	if (!dev->users++ && dev->open)
-		retval = dev->open(dev);
+	if (dev->users++) {
+		/*
+		 * Device is already opened, so we can exit immediately and
+		 * report success.
+		 */
+		goto out;
+	}
 
-	if (retval) {
-		dev->users--;
-		if (!--handle->open) {
+	if (dev->open) {
+		retval = dev->open(dev);
+		if (retval) {
+			dev->users--;
+			handle->open--;
 			/*
 			 * Make sure we are not delivering any more events
 			 * through this handle
 			 */
 			synchronize_rcu();
+			goto out;
 		}
 	}
 
+	if (dev->poller)
+		input_dev_poller_start(dev->poller);
+
  out:
 	mutex_unlock(&dev->mutex);
 	return retval;
@@ -655,8 +674,13 @@ void input_close_device(struct input_handle *handle)
 
 	__input_release_device(handle);
 
-	if (!--dev->users && dev->close)
-		dev->close(dev);
+	if (!--dev->users) {
+		if (dev->poller)
+			input_dev_poller_stop(dev->poller);
+
+		if (dev->close)
+			dev->close(dev);
+	}
 
 	if (!--handle->open) {
 		/*
@@ -1502,6 +1526,7 @@ static const struct attribute_group *input_dev_attr_groups[] = {
 	&input_dev_attr_group,
 	&input_dev_id_attr_group,
 	&input_dev_caps_attr_group,
+	&input_poller_attribute_group,
 	NULL
 };
 
@@ -1511,6 +1536,7 @@ static void input_dev_release(struct device *device)
 
 	input_ff_destroy(dev);
 	input_mt_destroy_slots(dev);
+	kfree(dev->poller);
 	kfree(dev->absinfo);
 	kfree(dev->vals);
 	kfree(dev);
@@ -1895,6 +1921,46 @@ void input_free_device(struct input_dev *dev)
 EXPORT_SYMBOL(input_free_device);
 
 /**
+ * input_set_timestamp - set timestamp for input events
+ * @dev: input device to set timestamp for
+ * @timestamp: the time at which the event has occurred
+ *   in CLOCK_MONOTONIC
+ *
+ * This function is intended to provide to the input system a more
+ * accurate time of when an event actually occurred. The driver should
+ * call this function as soon as a timestamp is acquired ensuring
+ * clock conversions in input_set_timestamp are done correctly.
+ *
+ * The system entering suspend state between timestamp acquisition and
+ * calling input_set_timestamp can result in inaccurate conversions.
+ */
+void input_set_timestamp(struct input_dev *dev, ktime_t timestamp)
+{
+	dev->timestamp[INPUT_CLK_MONO] = timestamp;
+	dev->timestamp[INPUT_CLK_REAL] = ktime_mono_to_real(timestamp);
+	dev->timestamp[INPUT_CLK_BOOT] = ktime_mono_to_any(timestamp,
+							   TK_OFFS_BOOT);
+}
+EXPORT_SYMBOL(input_set_timestamp);
+
+/**
+ * input_get_timestamp - get timestamp for input events
+ * @dev: input device to get timestamp from
+ *
+ * A valid timestamp is a timestamp of non-zero value.
+ */
+ktime_t *input_get_timestamp(struct input_dev *dev)
+{
+	const ktime_t invalid_timestamp = ktime_set(0, 0);
+
+	if (!ktime_compare(dev->timestamp[INPUT_CLK_MONO], invalid_timestamp))
+		input_set_timestamp(dev, ktime_get());
+
+	return dev->timestamp;
+}
+EXPORT_SYMBOL(input_get_timestamp);
+
+/**
  * input_set_capability - mark device as capable of a certain event
  * @dev: device that is capable of emitting or accepting event
  * @type: type of the event (EV_KEY, EV_REL, etc...)
@@ -2135,6 +2201,9 @@ int input_register_device(struct input_dev *dev)
 	if (!dev->setkeycode)
 		dev->setkeycode = input_default_setkeycode;
 
+	if (dev->poller)
+		input_dev_poller_finalize(dev->poller);
+
 	error = device_add(&dev->dev);
 	if (error)
 		goto err_free_vals;
diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig
index 72b932901d00..312b854b5506 100644
--- a/drivers/input/joystick/Kconfig
+++ b/drivers/input/joystick/Kconfig
@@ -362,4 +362,14 @@ config JOYSTICK_PXRC
 	  To compile this driver as a module, choose M here: the
 	  module will be called pxrc.
 
+config JOYSTICK_FSIA6B
+	tristate "FlySky FS-iA6B RC Receiver"
+	select SERIO
+	help
+	  Say Y here if you use a FlySky FS-i6 RC remote control along with the
+	  FS-iA6B RC receiver as a joystick input device.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called fsia6b.
+
 endif
diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile
index dd0492ebbed7..8656023f6ef5 100644
--- a/drivers/input/joystick/Makefile
+++ b/drivers/input/joystick/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_JOYSTICK_AS5011)		+= as5011.o
 obj-$(CONFIG_JOYSTICK_ANALOG)		+= analog.o
 obj-$(CONFIG_JOYSTICK_COBRA)		+= cobra.o
 obj-$(CONFIG_JOYSTICK_DB9)		+= db9.o
+obj-$(CONFIG_JOYSTICK_FSIA6B)		+= fsia6b.o
 obj-$(CONFIG_JOYSTICK_GAMECON)		+= gamecon.o
 obj-$(CONFIG_JOYSTICK_GF2K)		+= gf2k.o
 obj-$(CONFIG_JOYSTICK_GRIP)		+= grip.o
@@ -23,7 +24,7 @@ obj-$(CONFIG_JOYSTICK_JOYDUMP)		+= joydump.o
 obj-$(CONFIG_JOYSTICK_MAGELLAN)		+= magellan.o
 obj-$(CONFIG_JOYSTICK_MAPLE)		+= maplecontrol.o
 obj-$(CONFIG_JOYSTICK_PSXPAD_SPI)	+= psxpad-spi.o
-obj-$(CONFIG_JOYSTICK_PXRC)			+= pxrc.o
+obj-$(CONFIG_JOYSTICK_PXRC)		+= pxrc.o
 obj-$(CONFIG_JOYSTICK_SIDEWINDER)	+= sidewinder.o
 obj-$(CONFIG_JOYSTICK_SPACEBALL)	+= spaceball.o
 obj-$(CONFIG_JOYSTICK_SPACEORB)		+= spaceorb.o
@@ -32,7 +33,7 @@ obj-$(CONFIG_JOYSTICK_TMDC)		+= tmdc.o
 obj-$(CONFIG_JOYSTICK_TURBOGRAFX)	+= turbografx.o
 obj-$(CONFIG_JOYSTICK_TWIDJOY)		+= twidjoy.o
 obj-$(CONFIG_JOYSTICK_WARRIOR)		+= warrior.o
+obj-$(CONFIG_JOYSTICK_WALKERA0701)	+= walkera0701.o
 obj-$(CONFIG_JOYSTICK_XPAD)		+= xpad.o
 obj-$(CONFIG_JOYSTICK_ZHENHUA)		+= zhenhua.o
-obj-$(CONFIG_JOYSTICK_WALKERA0701)	+= walkera0701.o
 
diff --git a/drivers/input/joystick/fsia6b.c b/drivers/input/joystick/fsia6b.c
new file mode 100644
index 000000000000..e78c4c768990
--- /dev/null
+++ b/drivers/input/joystick/fsia6b.c
@@ -0,0 +1,231 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * FS-iA6B iBus RC receiver driver
+ *
+ * This driver provides all 14 channels of the FlySky FS-ia6B RC receiver
+ * as analog values.
+ *
+ * Additionally, the channels can be converted to discrete switch values.
+ * By default, it is configured for the offical FS-i6 remote control.
+ * If you use a different hardware configuration, you can configure it
+ * using the `switch_config` parameter.
+ */
+
+#include <linux/device.h>
+#include <linux/input.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/serio.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#define DRIVER_DESC		"FS-iA6B iBus RC receiver"
+
+MODULE_AUTHOR("Markus Koch <markus@notsyncing.net>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+#define IBUS_SERVO_COUNT	14
+
+static char *switch_config = "00000022320000";
+module_param(switch_config, charp, 0444);
+MODULE_PARM_DESC(switch_config,
+		 "Amount of switch positions per channel (14 characters, 0-3)");
+
+static int fsia6b_axes[IBUS_SERVO_COUNT] = {
+	ABS_X, ABS_Y,
+	ABS_Z, ABS_RX,
+	ABS_RY, ABS_RZ,
+	ABS_HAT0X, ABS_HAT0Y,
+	ABS_HAT1X, ABS_HAT1Y,
+	ABS_HAT2X, ABS_HAT2Y,
+	ABS_HAT3X, ABS_HAT3Y
+};
+
+enum ibus_state { SYNC, COLLECT, PROCESS };
+
+struct ibus_packet {
+	enum ibus_state state;
+
+	int offset;
+	u16 ibuf;
+	u16 channel[IBUS_SERVO_COUNT];
+};
+
+struct fsia6b {
+	struct input_dev *dev;
+	struct ibus_packet packet;
+
+	char phys[32];
+};
+
+static irqreturn_t fsia6b_serio_irq(struct serio *serio,
+				    unsigned char data, unsigned int flags)
+{
+	struct fsia6b *fsia6b = serio_get_drvdata(serio);
+	int i;
+	int sw_state;
+	int sw_id = BTN_0;
+
+	fsia6b->packet.ibuf = (data << 8) | ((fsia6b->packet.ibuf >> 8) & 0xFF);
+
+	switch (fsia6b->packet.state) {
+	case SYNC:
+		if (fsia6b->packet.ibuf == 0x4020)
+			fsia6b->packet.state = COLLECT;
+		break;
+
+	case COLLECT:
+		fsia6b->packet.state = PROCESS;
+		break;
+
+	case PROCESS:
+		fsia6b->packet.channel[fsia6b->packet.offset] =
+				fsia6b->packet.ibuf;
+		fsia6b->packet.offset++;
+
+		if (fsia6b->packet.offset == IBUS_SERVO_COUNT) {
+			fsia6b->packet.offset = 0;
+			fsia6b->packet.state = SYNC;
+			for (i = 0; i < IBUS_SERVO_COUNT; ++i) {
+				input_report_abs(fsia6b->dev, fsia6b_axes[i],
+						 fsia6b->packet.channel[i]);
+
+				sw_state = 0;
+				if (fsia6b->packet.channel[i] > 1900)
+					sw_state = 1;
+				else if (fsia6b->packet.channel[i] < 1100)
+					sw_state = 2;
+
+				switch (switch_config[i]) {
+				case '3':
+					input_report_key(fsia6b->dev,
+							 sw_id++,
+							 sw_state == 0);
+					/* fall-through */
+				case '2':
+					input_report_key(fsia6b->dev,
+							 sw_id++,
+							 sw_state == 1);
+					/* fall-through */
+				case '1':
+					input_report_key(fsia6b->dev,
+							 sw_id++,
+							 sw_state == 2);
+				}
+			}
+			input_sync(fsia6b->dev);
+		} else {
+			fsia6b->packet.state = COLLECT;
+		}
+		break;
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int fsia6b_serio_connect(struct serio *serio, struct serio_driver *drv)
+{
+	struct fsia6b *fsia6b;
+	struct input_dev *input_dev;
+	int err;
+	int i, j;
+	int sw_id = 0;
+
+	fsia6b = kzalloc(sizeof(*fsia6b), GFP_KERNEL);
+	if (!fsia6b)
+		return -ENOMEM;
+
+	fsia6b->packet.ibuf = 0;
+	fsia6b->packet.offset = 0;
+	fsia6b->packet.state = SYNC;
+
+	serio_set_drvdata(serio, fsia6b);
+
+	input_dev = input_allocate_device();
+	if (!input_dev) {
+		err = -ENOMEM;
+		goto fail1;
+	}
+	fsia6b->dev = input_dev;
+
+	snprintf(fsia6b->phys, sizeof(fsia6b->phys), "%s/input0", serio->phys);
+
+	input_dev->name = DRIVER_DESC;
+	input_dev->phys = fsia6b->phys;
+	input_dev->id.bustype = BUS_RS232;
+	input_dev->id.vendor = SERIO_FSIA6B;
+	input_dev->id.product = serio->id.id;
+	input_dev->id.version = 0x0100;
+	input_dev->dev.parent = &serio->dev;
+
+	for (i = 0; i < IBUS_SERVO_COUNT; i++)
+		input_set_abs_params(input_dev, fsia6b_axes[i],
+				     1000, 2000, 2, 2);
+
+	/* Register switch configuration */
+	for (i = 0; i < IBUS_SERVO_COUNT; i++) {
+		if (switch_config[i] < '0' || switch_config[i] > '3') {
+			dev_err(&fsia6b->dev->dev,
+				"Invalid switch configuration supplied for fsia6b.\n");
+			err = -EINVAL;
+			goto fail2;
+		}
+
+		for (j = '1'; j <= switch_config[i]; j++) {
+			input_set_capability(input_dev, EV_KEY, BTN_0 + sw_id);
+			sw_id++;
+		}
+	}
+
+	err = serio_open(serio, drv);
+	if (err)
+		goto fail2;
+
+	err = input_register_device(fsia6b->dev);
+	if (err)
+		goto fail3;
+
+	return 0;
+
+fail3:	serio_close(serio);
+fail2:	input_free_device(input_dev);
+fail1:	serio_set_drvdata(serio, NULL);
+	kfree(fsia6b);
+	return err;
+}
+
+static void fsia6b_serio_disconnect(struct serio *serio)
+{
+	struct fsia6b *fsia6b = serio_get_drvdata(serio);
+
+	serio_close(serio);
+	serio_set_drvdata(serio, NULL);
+	input_unregister_device(fsia6b->dev);
+	kfree(fsia6b);
+}
+
+static const struct serio_device_id fsia6b_serio_ids[] = {
+	{
+		.type	= SERIO_RS232,
+		.proto	= SERIO_FSIA6B,
+		.id	= SERIO_ANY,
+		.extra	= SERIO_ANY,
+	},
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, fsia6b_serio_ids);
+
+static struct serio_driver fsia6b_serio_drv = {
+	.driver		= {
+		.name	= "fsia6b"
+	},
+	.description	= DRIVER_DESC,
+	.id_table	= fsia6b_serio_ids,
+	.interrupt	= fsia6b_serio_irq,
+	.connect	= fsia6b_serio_connect,
+	.disconnect	= fsia6b_serio_disconnect
+};
+
+module_serio_driver(fsia6b_serio_drv)
diff --git a/drivers/input/joystick/sidewinder.c b/drivers/input/joystick/sidewinder.c
index 0284da874a2b..1777e68c9f02 100644
--- a/drivers/input/joystick/sidewinder.c
+++ b/drivers/input/joystick/sidewinder.c
@@ -223,7 +223,7 @@ static __u64 sw_get_bits(unsigned char *buf, int pos, int num, char bits)
 
 static void sw_init_digital(struct gameport *gameport)
 {
-	int seq[] = { 140, 140+725, 140+300, 0 };
+	static const int seq[] = { 140, 140+725, 140+300, 0 };
 	unsigned long flags;
 	int i, t;
 
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index 90e8a7f2f07c..2e6d2887eec1 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -733,17 +733,6 @@ config KEYBOARD_XTKBD
 	  To compile this driver as a module, choose M here: the
 	  module will be called xtkbd.
 
-config KEYBOARD_W90P910
-	tristate "W90P910 Matrix Keypad support"
-	depends on ARCH_W90X900
-	select INPUT_MATRIXKMAP
-	help
-	  Say Y here to enable the matrix keypad on evaluation board
-	  based on W90P910.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called w90p910_keypad.
-
 config KEYBOARD_CROS_EC
 	tristate "ChromeOS EC keyboard"
 	select INPUT_MATRIXKMAP
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 06a0af6efeae..9510325c0c5d 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -68,4 +68,3 @@ obj-$(CONFIG_KEYBOARD_TEGRA)		+= tegra-kbc.o
 obj-$(CONFIG_KEYBOARD_TM2_TOUCHKEY)	+= tm2-touchkey.o
 obj-$(CONFIG_KEYBOARD_TWL4030)		+= twl4030_keypad.o
 obj-$(CONFIG_KEYBOARD_XTKBD)		+= xtkbd.o
-obj-$(CONFIG_KEYBOARD_W90P910)		+= w90p910_keypad.o
diff --git a/drivers/input/keyboard/applespi.c b/drivers/input/keyboard/applespi.c
index 584289b67fb3..d38398526965 100644
--- a/drivers/input/keyboard/applespi.c
+++ b/drivers/input/keyboard/applespi.c
@@ -1797,30 +1797,12 @@ static int applespi_probe(struct spi_device *spi)
 
 	/* set up debugfs entries for touchpad dimensions logging */
 	applespi->debugfs_root = debugfs_create_dir("applespi", NULL);
-	if (IS_ERR(applespi->debugfs_root)) {
-		if (PTR_ERR(applespi->debugfs_root) != -ENODEV)
-			dev_warn(&applespi->spi->dev,
-				 "Error creating debugfs root entry (%ld)\n",
-				 PTR_ERR(applespi->debugfs_root));
-	} else {
-		struct dentry *ret;
-
-		ret = debugfs_create_bool("enable_tp_dim", 0600,
-					  applespi->debugfs_root,
-					  &applespi->debug_tp_dim);
-		if (IS_ERR(ret))
-			dev_dbg(&applespi->spi->dev,
-				"Error creating debugfs entry enable_tp_dim (%ld)\n",
-				PTR_ERR(ret));
-
-		ret = debugfs_create_file("tp_dim", 0400,
-					  applespi->debugfs_root, applespi,
-					  &applespi_tp_dim_fops);
-		if (IS_ERR(ret))
-			dev_dbg(&applespi->spi->dev,
-				"Error creating debugfs entry tp_dim (%ld)\n",
-				PTR_ERR(ret));
-	}
+
+	debugfs_create_bool("enable_tp_dim", 0600, applespi->debugfs_root,
+			    &applespi->debug_tp_dim);
+
+	debugfs_create_file("tp_dim", 0400, applespi->debugfs_root, applespi,
+			    &applespi_tp_dim_fops);
 
 	return 0;
 }
diff --git a/drivers/input/keyboard/bcm-keypad.c b/drivers/input/keyboard/bcm-keypad.c
index e1cf63ee148f..2b771c3a5578 100644
--- a/drivers/input/keyboard/bcm-keypad.c
+++ b/drivers/input/keyboard/bcm-keypad.c
@@ -413,10 +413,8 @@ static int bcm_kp_probe(struct platform_device *pdev)
 	bcm_kp_stop(kp);
 
 	kp->irq = platform_get_irq(pdev, 0);
-	if (kp->irq < 0) {
-		dev_err(&pdev->dev, "no IRQ specified\n");
+	if (kp->irq < 0)
 		return -EINVAL;
-	}
 
 	error = devm_request_threaded_irq(&pdev->dev, kp->irq,
 					  NULL, bcm_kp_isr_thread,
diff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c
index 38cb6d82d8fe..bef7bee6f05e 100644
--- a/drivers/input/keyboard/cros_ec_keyb.c
+++ b/drivers/input/keyboard/cros_ec_keyb.c
@@ -226,6 +226,8 @@ static int cros_ec_keyb_work(struct notifier_block *nb,
 {
 	struct cros_ec_keyb *ckdev = container_of(nb, struct cros_ec_keyb,
 						  notifier);
+	uint8_t mkbp_event_type = ckdev->ec->event_data.event_type &
+				  EC_MKBP_EVENT_TYPE_MASK;
 	u32 val;
 	unsigned int ev_type;
 
@@ -237,7 +239,7 @@ static int cros_ec_keyb_work(struct notifier_block *nb,
 	if (queued_during_suspend && !device_may_wakeup(ckdev->dev))
 		return NOTIFY_OK;
 
-	switch (ckdev->ec->event_data.event_type & EC_MKBP_EVENT_TYPE_MASK) {
+	switch (mkbp_event_type) {
 	case EC_MKBP_EVENT_KEY_MATRIX:
 		pm_wakeup_event(ckdev->dev, 0);
 
@@ -264,7 +266,7 @@ static int cros_ec_keyb_work(struct notifier_block *nb,
 	case EC_MKBP_EVENT_SWITCH:
 		pm_wakeup_event(ckdev->dev, 0);
 
-		if (ckdev->ec->event_data.event_type == EC_MKBP_EVENT_BUTTON) {
+		if (mkbp_event_type == EC_MKBP_EVENT_BUTTON) {
 			val = get_unaligned_le32(
 					&ckdev->ec->event_data.data.buttons);
 			ev_type = EV_KEY;
diff --git a/drivers/input/keyboard/davinci_keyscan.c b/drivers/input/keyboard/davinci_keyscan.c
index 1d94928db922..f489cd585b33 100644
--- a/drivers/input/keyboard/davinci_keyscan.c
+++ b/drivers/input/keyboard/davinci_keyscan.c
@@ -192,7 +192,6 @@ static int __init davinci_ks_probe(struct platform_device *pdev)
 
 	davinci_ks->irq = platform_get_irq(pdev, 0);
 	if (davinci_ks->irq < 0) {
-		dev_err(dev, "no key scan irq\n");
 		error = davinci_ks->irq;
 		goto fail2;
 	}
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index 03f4d152f6b7..1373dc5b0765 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -351,10 +351,7 @@ static struct attribute *gpio_keys_attrs[] = {
 	&dev_attr_disabled_switches.attr,
 	NULL,
 };
-
-static const struct attribute_group gpio_keys_attr_group = {
-	.attrs = gpio_keys_attrs,
-};
+ATTRIBUTE_GROUPS(gpio_keys);
 
 static void gpio_keys_gpio_report_event(struct gpio_button_data *bdata)
 {
@@ -851,13 +848,6 @@ static int gpio_keys_probe(struct platform_device *pdev)
 
 	fwnode_handle_put(child);
 
-	error = devm_device_add_group(dev, &gpio_keys_attr_group);
-	if (error) {
-		dev_err(dev, "Unable to export keys/switches, error: %d\n",
-			error);
-		return error;
-	}
-
 	error = input_register_device(input);
 	if (error) {
 		dev_err(dev, "Unable to register input device, error: %d\n",
@@ -1026,6 +1016,7 @@ static struct platform_driver gpio_keys_device_driver = {
 		.name	= "gpio-keys",
 		.pm	= &gpio_keys_pm_ops,
 		.of_match_table = gpio_keys_of_match,
+		.dev_groups	= gpio_keys_groups,
 	}
 };
 
diff --git a/drivers/input/keyboard/imx_keypad.c b/drivers/input/keyboard/imx_keypad.c
index 97500a2de2d5..5a46d113e909 100644
--- a/drivers/input/keyboard/imx_keypad.c
+++ b/drivers/input/keyboard/imx_keypad.c
@@ -430,10 +430,8 @@ static int imx_keypad_probe(struct platform_device *pdev)
 	}
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "no irq defined in platform data\n");
+	if (irq < 0)
 		return irq;
-	}
 
 	input_dev = devm_input_allocate_device(&pdev->dev);
 	if (!input_dev) {
diff --git a/drivers/input/keyboard/lpc32xx-keys.c b/drivers/input/keyboard/lpc32xx-keys.c
index a34e3271b0c9..348af2aeb5de 100644
--- a/drivers/input/keyboard/lpc32xx-keys.c
+++ b/drivers/input/keyboard/lpc32xx-keys.c
@@ -172,10 +172,8 @@ static int lpc32xx_kscan_probe(struct platform_device *pdev)
 	}
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "failed to get platform irq\n");
+	if (irq < 0)
 		return -EINVAL;
-	}
 
 	kscandat = devm_kzalloc(&pdev->dev, sizeof(*kscandat),
 				GFP_KERNEL);
diff --git a/drivers/input/keyboard/mpr121_touchkey.c b/drivers/input/keyboard/mpr121_touchkey.c
index e9ceaa16b46a..ee80de44ce3f 100644
--- a/drivers/input/keyboard/mpr121_touchkey.c
+++ b/drivers/input/keyboard/mpr121_touchkey.c
@@ -253,8 +253,7 @@ static int mpr_touchkey_probe(struct i2c_client *client,
 
 	mpr121->client = client;
 	mpr121->input_dev = input_dev;
-	mpr121->keycount = device_property_read_u32_array(dev, "linux,keycodes",
-							  NULL, 0);
+	mpr121->keycount = device_property_count_u32(dev, "linux,keycodes");
 	if (mpr121->keycount > MPR121_MAX_KEY_COUNT) {
 		dev_err(dev, "too many keys defined (%d)\n", mpr121->keycount);
 		return -EINVAL;
diff --git a/drivers/input/keyboard/nomadik-ske-keypad.c b/drivers/input/keyboard/nomadik-ske-keypad.c
index fa265fdce2c4..608446e14614 100644
--- a/drivers/input/keyboard/nomadik-ske-keypad.c
+++ b/drivers/input/keyboard/nomadik-ske-keypad.c
@@ -235,10 +235,8 @@ static int __init ske_keypad_probe(struct platform_device *pdev)
 	}
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "failed to get keypad irq\n");
+	if (irq < 0)
 		return -EINVAL;
-	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
diff --git a/drivers/input/keyboard/nspire-keypad.c b/drivers/input/keyboard/nspire-keypad.c
index 57eac91ecd76..63d5e488137d 100644
--- a/drivers/input/keyboard/nspire-keypad.c
+++ b/drivers/input/keyboard/nspire-keypad.c
@@ -165,10 +165,8 @@ static int nspire_keypad_probe(struct platform_device *pdev)
 	int error;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "failed to get keypad irq\n");
+	if (irq < 0)
 		return -EINVAL;
-	}
 
 	keypad = devm_kzalloc(&pdev->dev, sizeof(struct nspire_keypad),
 			      GFP_KERNEL);
diff --git a/drivers/input/keyboard/opencores-kbd.c b/drivers/input/keyboard/opencores-kbd.c
index 159346cb4060..b0ea387414c1 100644
--- a/drivers/input/keyboard/opencores-kbd.c
+++ b/drivers/input/keyboard/opencores-kbd.c
@@ -49,10 +49,8 @@ static int opencores_kbd_probe(struct platform_device *pdev)
 	}
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "missing board IRQ resource\n");
+	if (irq < 0)
 		return -EINVAL;
-	}
 
 	opencores_kbd = devm_kzalloc(&pdev->dev, sizeof(*opencores_kbd),
 				     GFP_KERNEL);
diff --git a/drivers/input/keyboard/pmic8xxx-keypad.c b/drivers/input/keyboard/pmic8xxx-keypad.c
index d529768a1d06..91d5811d6f0e 100644
--- a/drivers/input/keyboard/pmic8xxx-keypad.c
+++ b/drivers/input/keyboard/pmic8xxx-keypad.c
@@ -544,16 +544,12 @@ static int pmic8xxx_kp_probe(struct platform_device *pdev)
 	}
 
 	kp->key_sense_irq = platform_get_irq(pdev, 0);
-	if (kp->key_sense_irq < 0) {
-		dev_err(&pdev->dev, "unable to get keypad sense irq\n");
+	if (kp->key_sense_irq < 0)
 		return kp->key_sense_irq;
-	}
 
 	kp->key_stuck_irq = platform_get_irq(pdev, 1);
-	if (kp->key_stuck_irq < 0) {
-		dev_err(&pdev->dev, "unable to get keypad stuck irq\n");
+	if (kp->key_stuck_irq < 0)
 		return kp->key_stuck_irq;
-	}
 
 	kp->input->name = "PMIC8XXX keypad";
 	kp->input->phys = "pmic8xxx_keypad/input0";
diff --git a/drivers/input/keyboard/pxa27x_keypad.c b/drivers/input/keyboard/pxa27x_keypad.c
index 39023664d2f2..7e65708b25a4 100644
--- a/drivers/input/keyboard/pxa27x_keypad.c
+++ b/drivers/input/keyboard/pxa27x_keypad.c
@@ -727,10 +727,8 @@ static int pxa27x_keypad_probe(struct platform_device *pdev)
 		return -EINVAL;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "failed to get keypad irq\n");
+	if (irq < 0)
 		return -ENXIO;
-	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (res == NULL) {
diff --git a/drivers/input/keyboard/pxa930_rotary.c b/drivers/input/keyboard/pxa930_rotary.c
index 585e7765cbf0..f7414091d94e 100644
--- a/drivers/input/keyboard/pxa930_rotary.c
+++ b/drivers/input/keyboard/pxa930_rotary.c
@@ -89,10 +89,8 @@ static int pxa930_rotary_probe(struct platform_device *pdev)
 	int err;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "no irq for rotary controller\n");
+	if (irq < 0)
 		return -ENXIO;
-	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
diff --git a/drivers/input/keyboard/sh_keysc.c b/drivers/input/keyboard/sh_keysc.c
index 08ba41a81f14..27ad73f43451 100644
--- a/drivers/input/keyboard/sh_keysc.c
+++ b/drivers/input/keyboard/sh_keysc.c
@@ -181,10 +181,8 @@ static int sh_keysc_probe(struct platform_device *pdev)
 	}
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "failed to get irq\n");
+	if (irq < 0)
 		goto err0;
-	}
 
 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 	if (priv == NULL) {
diff --git a/drivers/input/keyboard/snvs_pwrkey.c b/drivers/input/keyboard/snvs_pwrkey.c
index 5342d8d45f81..e76b7a400a1c 100644
--- a/drivers/input/keyboard/snvs_pwrkey.c
+++ b/drivers/input/keyboard/snvs_pwrkey.c
@@ -118,10 +118,8 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
 	pdata->wakeup = of_property_read_bool(np, "wakeup-source");
 
 	pdata->irq = platform_get_irq(pdev, 0);
-	if (pdata->irq < 0) {
-		dev_err(&pdev->dev, "no irq defined in platform data\n");
+	if (pdata->irq < 0)
 		return -EINVAL;
-	}
 
 	regmap_update_bits(pdata->snvs, SNVS_LPCR_REG, SNVS_LPCR_DEP_EN, SNVS_LPCR_DEP_EN);
 
diff --git a/drivers/input/keyboard/spear-keyboard.c b/drivers/input/keyboard/spear-keyboard.c
index 7d25fa338ab4..9b8d78f87253 100644
--- a/drivers/input/keyboard/spear-keyboard.c
+++ b/drivers/input/keyboard/spear-keyboard.c
@@ -191,10 +191,8 @@ static int spear_kbd_probe(struct platform_device *pdev)
 	int error;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "not able to get irq for the device\n");
+	if (irq < 0)
 		return irq;
-	}
 
 	kbd = devm_kzalloc(&pdev->dev, sizeof(*kbd), GFP_KERNEL);
 	if (!kbd) {
diff --git a/drivers/input/keyboard/st-keyscan.c b/drivers/input/keyboard/st-keyscan.c
index f097128b93fe..27562cd67fb6 100644
--- a/drivers/input/keyboard/st-keyscan.c
+++ b/drivers/input/keyboard/st-keyscan.c
@@ -187,10 +187,8 @@ static int keyscan_probe(struct platform_device *pdev)
 	keyscan_stop(keypad_data);
 
 	keypad_data->irq = platform_get_irq(pdev, 0);
-	if (keypad_data->irq < 0) {
-		dev_err(&pdev->dev, "no IRQ specified\n");
+	if (keypad_data->irq < 0)
 		return -EINVAL;
-	}
 
 	error = devm_request_irq(&pdev->dev, keypad_data->irq, keyscan_isr, 0,
 				 pdev->name, keypad_data);
diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index a37a7a9e9171..d34d6947960f 100644
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -631,10 +631,8 @@ static int tegra_kbc_probe(struct platform_device *pdev)
 		return -EINVAL;
 
 	kbc->irq = platform_get_irq(pdev, 0);
-	if (kbc->irq < 0) {
-		dev_err(&pdev->dev, "failed to get keyboard IRQ\n");
+	if (kbc->irq < 0)
 		return -ENXIO;
-	}
 
 	kbc->idev = devm_input_allocate_device(&pdev->dev);
 	if (!kbc->idev) {
diff --git a/drivers/input/keyboard/w90p910_keypad.c b/drivers/input/keyboard/w90p910_keypad.c
deleted file mode 100644
index c88d05d6108a..000000000000
--- a/drivers/input/keyboard/w90p910_keypad.c
+++ /dev/null
@@ -1,264 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2008-2009 Nuvoton technology corporation.
- *
- * Wan ZongShun <mcuos.com@gmail.com>
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/input.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-
-#include <linux/platform_data/keypad-w90p910.h>
-
-/* Keypad Interface Control Registers */
-#define KPI_CONF		0x00
-#define KPI_3KCONF		0x04
-#define KPI_LPCONF		0x08
-#define KPI_STATUS		0x0C
-
-#define IS1KEY			(0x01 << 16)
-#define INTTR			(0x01 << 21)
-#define KEY0R			(0x0f << 3)
-#define KEY0C			0x07
-#define DEBOUNCE_BIT		0x08
-#define KSIZE0			(0x01 << 16)
-#define KSIZE1			(0x01 << 17)
-#define KPSEL			(0x01 << 19)
-#define ENKP			(0x01 << 18)
-
-#define KGET_RAW(n)		(((n) & KEY0R) >> 3)
-#define KGET_COLUMN(n)		((n) & KEY0C)
-
-#define W90P910_NUM_ROWS	8
-#define W90P910_NUM_COLS	8
-#define W90P910_ROW_SHIFT	3
-
-struct w90p910_keypad {
-	const struct w90p910_keypad_platform_data *pdata;
-	struct clk *clk;
-	struct input_dev *input_dev;
-	void __iomem *mmio_base;
-	int irq;
-	unsigned short keymap[W90P910_NUM_ROWS * W90P910_NUM_COLS];
-};
-
-static void w90p910_keypad_scan_matrix(struct w90p910_keypad *keypad,
-							unsigned int status)
-{
-	struct input_dev *input_dev = keypad->input_dev;
-	unsigned int row = KGET_RAW(status);
-	unsigned int col = KGET_COLUMN(status);
-	unsigned int code = MATRIX_SCAN_CODE(row, col, W90P910_ROW_SHIFT);
-	unsigned int key = keypad->keymap[code];
-
-	input_event(input_dev, EV_MSC, MSC_SCAN, code);
-	input_report_key(input_dev, key, 1);
-	input_sync(input_dev);
-
-	input_event(input_dev, EV_MSC, MSC_SCAN, code);
-	input_report_key(input_dev, key, 0);
-	input_sync(input_dev);
-}
-
-static irqreturn_t w90p910_keypad_irq_handler(int irq, void *dev_id)
-{
-	struct w90p910_keypad *keypad = dev_id;
-	unsigned int  kstatus, val;
-
-	kstatus = __raw_readl(keypad->mmio_base + KPI_STATUS);
-
-	val = INTTR | IS1KEY;
-
-	if (kstatus & val)
-		w90p910_keypad_scan_matrix(keypad, kstatus);
-
-	return IRQ_HANDLED;
-}
-
-static int w90p910_keypad_open(struct input_dev *dev)
-{
-	struct w90p910_keypad *keypad = input_get_drvdata(dev);
-	const struct w90p910_keypad_platform_data *pdata = keypad->pdata;
-	unsigned int val, config;
-
-	/* Enable unit clock */
-	clk_enable(keypad->clk);
-
-	val = __raw_readl(keypad->mmio_base + KPI_CONF);
-	val |= (KPSEL | ENKP);
-	val &= ~(KSIZE0 | KSIZE1);
-
-	config = pdata->prescale | (pdata->debounce << DEBOUNCE_BIT);
-
-	val |= config;
-
-	__raw_writel(val, keypad->mmio_base + KPI_CONF);
-
-	return 0;
-}
-
-static void w90p910_keypad_close(struct input_dev *dev)
-{
-	struct w90p910_keypad *keypad = input_get_drvdata(dev);
-
-	/* Disable clock unit */
-	clk_disable(keypad->clk);
-}
-
-static int w90p910_keypad_probe(struct platform_device *pdev)
-{
-	const struct w90p910_keypad_platform_data *pdata =
-						dev_get_platdata(&pdev->dev);
-	const struct matrix_keymap_data *keymap_data;
-	struct w90p910_keypad *keypad;
-	struct input_dev *input_dev;
-	struct resource *res;
-	int irq;
-	int error;
-
-	if (!pdata) {
-		dev_err(&pdev->dev, "no platform data defined\n");
-		return -EINVAL;
-	}
-
-	keymap_data = pdata->keymap_data;
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "failed to get keypad irq\n");
-		return -ENXIO;
-	}
-
-	keypad = kzalloc(sizeof(struct w90p910_keypad), GFP_KERNEL);
-	input_dev = input_allocate_device();
-	if (!keypad || !input_dev) {
-		dev_err(&pdev->dev, "failed to allocate driver data\n");
-		error = -ENOMEM;
-		goto failed_free;
-	}
-
-	keypad->pdata = pdata;
-	keypad->input_dev = input_dev;
-	keypad->irq = irq;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (res == NULL) {
-		dev_err(&pdev->dev, "failed to get I/O memory\n");
-		error = -ENXIO;
-		goto failed_free;
-	}
-
-	res = request_mem_region(res->start, resource_size(res), pdev->name);
-	if (res == NULL) {
-		dev_err(&pdev->dev, "failed to request I/O memory\n");
-		error = -EBUSY;
-		goto failed_free;
-	}
-
-	keypad->mmio_base = ioremap(res->start, resource_size(res));
-	if (keypad->mmio_base == NULL) {
-		dev_err(&pdev->dev, "failed to remap I/O memory\n");
-		error = -ENXIO;
-		goto failed_free_res;
-	}
-
-	keypad->clk = clk_get(&pdev->dev, NULL);
-	if (IS_ERR(keypad->clk)) {
-		dev_err(&pdev->dev, "failed to get keypad clock\n");
-		error = PTR_ERR(keypad->clk);
-		goto failed_free_io;
-	}
-
-	/* set multi-function pin for w90p910 kpi. */
-	mfp_set_groupi(&pdev->dev);
-
-	input_dev->name = pdev->name;
-	input_dev->id.bustype = BUS_HOST;
-	input_dev->open = w90p910_keypad_open;
-	input_dev->close = w90p910_keypad_close;
-	input_dev->dev.parent = &pdev->dev;
-
-	error = matrix_keypad_build_keymap(keymap_data, NULL,
-					   W90P910_NUM_ROWS, W90P910_NUM_COLS,
-					   keypad->keymap, input_dev);
-	if (error) {
-		dev_err(&pdev->dev, "failed to build keymap\n");
-		goto failed_put_clk;
-	}
-
-	error = request_irq(keypad->irq, w90p910_keypad_irq_handler,
-			    0, pdev->name, keypad);
-	if (error) {
-		dev_err(&pdev->dev, "failed to request IRQ\n");
-		goto failed_put_clk;
-	}
-
-	__set_bit(EV_REP, input_dev->evbit);
-	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
-	input_set_drvdata(input_dev, keypad);
-
-	/* Register the input device */
-	error = input_register_device(input_dev);
-	if (error) {
-		dev_err(&pdev->dev, "failed to register input device\n");
-		goto failed_free_irq;
-	}
-
-	platform_set_drvdata(pdev, keypad);
-	return 0;
-
-failed_free_irq:
-	free_irq(irq, keypad);
-failed_put_clk:
-	clk_put(keypad->clk);
-failed_free_io:
-	iounmap(keypad->mmio_base);
-failed_free_res:
-	release_mem_region(res->start, resource_size(res));
-failed_free:
-	input_free_device(input_dev);
-	kfree(keypad);
-	return error;
-}
-
-static int w90p910_keypad_remove(struct platform_device *pdev)
-{
-	struct w90p910_keypad *keypad = platform_get_drvdata(pdev);
-	struct resource *res;
-
-	free_irq(keypad->irq, keypad);
-
-	clk_put(keypad->clk);
-
-	input_unregister_device(keypad->input_dev);
-
-	iounmap(keypad->mmio_base);
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(res->start, resource_size(res));
-
-	kfree(keypad);
-
-	return 0;
-}
-
-static struct platform_driver w90p910_keypad_driver = {
-	.probe		= w90p910_keypad_probe,
-	.remove		= w90p910_keypad_remove,
-	.driver		= {
-		.name	= "nuc900-kpi",
-	},
-};
-module_platform_driver(w90p910_keypad_driver);
-
-MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
-MODULE_DESCRIPTION("w90p910 keypad driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:nuc900-keypad");
diff --git a/drivers/input/matrix-keymap.c b/drivers/input/matrix-keymap.c
index da312be94c3a..4fa53423f56c 100644
--- a/drivers/input/matrix-keymap.c
+++ b/drivers/input/matrix-keymap.c
@@ -81,7 +81,7 @@ static int matrix_keypad_parse_keymap(const char *propname,
 	if (!propname)
 		propname = "linux,keymap";
 
-	size = device_property_read_u32_array(dev, propname, NULL, 0);
+	size = device_property_count_u32(dev, propname);
 	if (size <= 0) {
 		dev_err(dev, "missing or malformed property %s: %d\n",
 			propname, size);
diff --git a/drivers/input/misc/88pm80x_onkey.c b/drivers/input/misc/88pm80x_onkey.c
index 45a09497f680..51c8a326fd06 100644
--- a/drivers/input/misc/88pm80x_onkey.c
+++ b/drivers/input/misc/88pm80x_onkey.c
@@ -77,7 +77,6 @@ static int pm80x_onkey_probe(struct platform_device *pdev)
 
 	info->irq = platform_get_irq(pdev, 0);
 	if (info->irq < 0) {
-		dev_err(&pdev->dev, "No IRQ resource!\n");
 		err = -EINVAL;
 		goto out;
 	}
diff --git a/drivers/input/misc/88pm860x_onkey.c b/drivers/input/misc/88pm860x_onkey.c
index cc87443aa2ee..685995cad73f 100644
--- a/drivers/input/misc/88pm860x_onkey.c
+++ b/drivers/input/misc/88pm860x_onkey.c
@@ -64,10 +64,8 @@ static int pm860x_onkey_probe(struct platform_device *pdev)
 	int irq, ret;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "No IRQ resource!\n");
+	if (irq < 0)
 		return -EINVAL;
-	}
 
 	info = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_onkey_info),
 			    GFP_KERNEL);
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index d07c1eb15aa6..7d9ae394e597 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -813,10 +813,10 @@ config INPUT_IDEAPAD_SLIDEBAR
 
 config INPUT_SOC_BUTTON_ARRAY
 	tristate "Windows-compatible SoC Button Array"
-	depends on KEYBOARD_GPIO
+	depends on KEYBOARD_GPIO && ACPI
 	help
-	  Say Y here if you have a SoC-based tablet that originally
-	  runs Windows 8.
+	  Say Y here if you have a SoC-based tablet that originally runs
+	  Windows 8 or a Microsoft Surface Book 2, Pro 5, Laptop 1 or later.
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called soc_button_array.
diff --git a/drivers/input/misc/ab8500-ponkey.c b/drivers/input/misc/ab8500-ponkey.c
index 12b18a8db315..ea3b8292acdd 100644
--- a/drivers/input/misc/ab8500-ponkey.c
+++ b/drivers/input/misc/ab8500-ponkey.c
@@ -55,16 +55,12 @@ static int ab8500_ponkey_probe(struct platform_device *pdev)
 	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);
+	if (irq_dbf < 0)
 		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);
+	if (irq_dbr < 0)
 		return irq_dbr;
-	}
 
 	ponkey = devm_kzalloc(&pdev->dev, sizeof(struct ab8500_ponkey),
 			      GFP_KERNEL);
diff --git a/drivers/input/misc/axp20x-pek.c b/drivers/input/misc/axp20x-pek.c
index debeeaeb8812..17c1cca74498 100644
--- a/drivers/input/misc/axp20x-pek.c
+++ b/drivers/input/misc/axp20x-pek.c
@@ -195,15 +195,12 @@ DEVICE_ATTR(startup, 0644, axp20x_show_attr_startup, axp20x_store_attr_startup);
 DEVICE_ATTR(shutdown, 0644, axp20x_show_attr_shutdown,
 	    axp20x_store_attr_shutdown);
 
-static struct attribute *axp20x_attributes[] = {
+static struct attribute *axp20x_attrs[] = {
 	&dev_attr_startup.attr,
 	&dev_attr_shutdown.attr,
 	NULL,
 };
-
-static const struct attribute_group axp20x_attribute_group = {
-	.attrs = axp20x_attributes,
-};
+ATTRIBUTE_GROUPS(axp20x);
 
 static irqreturn_t axp20x_pek_irq(int irq, void *pwr)
 {
@@ -232,20 +229,14 @@ static int axp20x_pek_probe_input_device(struct axp20x_pek *axp20x_pek,
 	int error;
 
 	axp20x_pek->irq_dbr = platform_get_irq_byname(pdev, "PEK_DBR");
-	if (axp20x_pek->irq_dbr < 0) {
-		dev_err(&pdev->dev, "No IRQ for PEK_DBR, error=%d\n",
-				axp20x_pek->irq_dbr);
+	if (axp20x_pek->irq_dbr < 0)
 		return axp20x_pek->irq_dbr;
-	}
 	axp20x_pek->irq_dbr = regmap_irq_get_virq(axp20x->regmap_irqc,
 						  axp20x_pek->irq_dbr);
 
 	axp20x_pek->irq_dbf = platform_get_irq_byname(pdev, "PEK_DBF");
-	if (axp20x_pek->irq_dbf < 0) {
-		dev_err(&pdev->dev, "No IRQ for PEK_DBF, error=%d\n",
-				axp20x_pek->irq_dbf);
+	if (axp20x_pek->irq_dbf < 0)
 		return axp20x_pek->irq_dbf;
-	}
 	axp20x_pek->irq_dbf = regmap_irq_get_virq(axp20x->regmap_irqc,
 						  axp20x_pek->irq_dbf);
 
@@ -356,13 +347,6 @@ static int axp20x_pek_probe(struct platform_device *pdev)
 
 	axp20x_pek->info = (struct axp20x_info *)match->driver_data;
 
-	error = devm_device_add_group(&pdev->dev, &axp20x_attribute_group);
-	if (error) {
-		dev_err(&pdev->dev, "Failed to create sysfs attributes: %d\n",
-			error);
-		return error;
-	}
-
 	platform_set_drvdata(pdev, axp20x_pek);
 
 	return 0;
@@ -411,6 +395,7 @@ static struct platform_driver axp20x_pek_driver = {
 	.driver		= {
 		.name		= "axp20x-pek",
 		.pm		= &axp20x_pek_pm_ops,
+		.dev_groups	= axp20x_groups,
 	},
 };
 module_platform_driver(axp20x_pek_driver);
diff --git a/drivers/input/misc/da9055_onkey.c b/drivers/input/misc/da9055_onkey.c
index a4ff4782e605..7a0d3a1d503c 100644
--- a/drivers/input/misc/da9055_onkey.c
+++ b/drivers/input/misc/da9055_onkey.c
@@ -76,11 +76,8 @@ static int da9055_onkey_probe(struct platform_device *pdev)
 	int irq, err;
 
 	irq = platform_get_irq_byname(pdev, "ONKEY");
-	if (irq < 0) {
-		dev_err(&pdev->dev,
-			"Failed to get an IRQ for input device, %d\n", irq);
+	if (irq < 0)
 		return -EINVAL;
-	}
 
 	onkey = devm_kzalloc(&pdev->dev, sizeof(*onkey), GFP_KERNEL);
 	if (!onkey) {
diff --git a/drivers/input/misc/da9063_onkey.c b/drivers/input/misc/da9063_onkey.c
index fd355cf59397..dace8577fa43 100644
--- a/drivers/input/misc/da9063_onkey.c
+++ b/drivers/input/misc/da9063_onkey.c
@@ -248,11 +248,8 @@ static int da9063_onkey_probe(struct platform_device *pdev)
 	}
 
 	irq = platform_get_irq_byname(pdev, "ONKEY");
-	if (irq < 0) {
-		error = irq;
-		dev_err(&pdev->dev, "Failed to get platform IRQ: %d\n", error);
-		return error;
-	}
+	if (irq < 0)
+		return irq;
 
 	error = devm_request_threaded_irq(&pdev->dev, irq,
 					  NULL, da9063_onkey_irq_handler,
diff --git a/drivers/input/misc/e3x0-button.c b/drivers/input/misc/e3x0-button.c
index 4d7217f43888..e2fde6e1553f 100644
--- a/drivers/input/misc/e3x0-button.c
+++ b/drivers/input/misc/e3x0-button.c
@@ -65,18 +65,12 @@ static int e3x0_button_probe(struct platform_device *pdev)
 	int error;
 
 	irq_press = platform_get_irq_byname(pdev, "press");
-	if (irq_press < 0) {
-		dev_err(&pdev->dev, "No IRQ for 'press', error=%d\n",
-			irq_press);
+	if (irq_press < 0)
 		return irq_press;
-	}
 
 	irq_release = platform_get_irq_byname(pdev, "release");
-	if (irq_release < 0) {
-		dev_err(&pdev->dev, "No IRQ for 'release', error=%d\n",
-			irq_release);
+	if (irq_release < 0)
 		return irq_release;
-	}
 
 	input = devm_input_allocate_device(&pdev->dev);
 	if (!input)
diff --git a/drivers/input/misc/hisi_powerkey.c b/drivers/input/misc/hisi_powerkey.c
index dee6245f38d7..d3c293a95d32 100644
--- a/drivers/input/misc/hisi_powerkey.c
+++ b/drivers/input/misc/hisi_powerkey.c
@@ -90,12 +90,8 @@ static int hi65xx_powerkey_probe(struct platform_device *pdev)
 	for (i = 0; i < ARRAY_SIZE(hi65xx_irq_info); i++) {
 
 		irq = platform_get_irq_byname(pdev, hi65xx_irq_info[i].name);
-		if (irq < 0) {
-			error = irq;
-			dev_err(dev, "couldn't get irq %s: %d\n",
-				hi65xx_irq_info[i].name, error);
-			return error;
-		}
+		if (irq < 0)
+			return irq;
 
 		error = devm_request_any_context_irq(dev, irq,
 						     hi65xx_irq_info[i].handler,
diff --git a/drivers/input/misc/max8925_onkey.c b/drivers/input/misc/max8925_onkey.c
index 7c49b8d23894..ffab4a490c75 100644
--- a/drivers/input/misc/max8925_onkey.c
+++ b/drivers/input/misc/max8925_onkey.c
@@ -71,16 +71,12 @@ static int max8925_onkey_probe(struct platform_device *pdev)
 	int irq[2], error;
 
 	irq[0] = platform_get_irq(pdev, 0);
-	if (irq[0] < 0) {
-		dev_err(&pdev->dev, "No IRQ resource!\n");
+	if (irq[0] < 0)
 		return -EINVAL;
-	}
 
 	irq[1] = platform_get_irq(pdev, 1);
-	if (irq[1] < 0) {
-		dev_err(&pdev->dev, "No IRQ resource!\n");
+	if (irq[1] < 0)
 		return -EINVAL;
-	}
 
 	info = devm_kzalloc(&pdev->dev, sizeof(struct max8925_onkey_info),
 			    GFP_KERNEL);
diff --git a/drivers/input/misc/pm8941-pwrkey.c b/drivers/input/misc/pm8941-pwrkey.c
index 017f81a66658..cf8104454e74 100644
--- a/drivers/input/misc/pm8941-pwrkey.c
+++ b/drivers/input/misc/pm8941-pwrkey.c
@@ -205,10 +205,8 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
 		return error;
 
 	pwrkey->irq = platform_get_irq(pdev, 0);
-	if (pwrkey->irq < 0) {
-		dev_err(&pdev->dev, "failed to get irq\n");
+	if (pwrkey->irq < 0)
 		return pwrkey->irq;
-	}
 
 	error = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_REV2,
 			    &pwrkey->revision);
diff --git a/drivers/input/misc/rk805-pwrkey.c b/drivers/input/misc/rk805-pwrkey.c
index 4a6d4a5746e5..3fb64dbda1a2 100644
--- a/drivers/input/misc/rk805-pwrkey.c
+++ b/drivers/input/misc/rk805-pwrkey.c
@@ -53,16 +53,12 @@ static int rk805_pwrkey_probe(struct platform_device *pdev)
 	input_set_capability(pwr, EV_KEY, KEY_POWER);
 
 	fall_irq = platform_get_irq(pdev, 0);
-	if (fall_irq < 0) {
-		dev_err(&pdev->dev, "Can't get fall irq: %d\n", fall_irq);
+	if (fall_irq < 0)
 		return fall_irq;
-	}
 
 	rise_irq = platform_get_irq(pdev, 1);
-	if (rise_irq < 0) {
-		dev_err(&pdev->dev, "Can't get rise irq: %d\n", rise_irq);
+	if (rise_irq < 0)
 		return rise_irq;
-	}
 
 	err = devm_request_any_context_irq(&pwr->dev, fall_irq,
 					   pwrkey_fall_irq,
diff --git a/drivers/input/misc/soc_button_array.c b/drivers/input/misc/soc_button_array.c
index 5e59f8e57f8e..97e3639e99d0 100644
--- a/drivers/input/misc/soc_button_array.c
+++ b/drivers/input/misc/soc_button_array.c
@@ -25,6 +25,11 @@ struct soc_button_info {
 	bool wakeup;
 };
 
+struct soc_device_data {
+	const struct soc_button_info *button_info;
+	int (*check)(struct device *dev);
+};
+
 /*
  * Some of the buttons like volume up/down are auto repeat, while others
  * are not. To support both, we register two platform devices, and put
@@ -87,8 +92,13 @@ soc_button_device_create(struct platform_device *pdev,
 			continue;
 
 		gpio = soc_button_lookup_gpio(&pdev->dev, info->acpi_index);
-		if (!gpio_is_valid(gpio))
+		if (gpio < 0 && gpio != -ENOENT) {
+			error = gpio;
+			goto err_free_mem;
+		} else if (!gpio_is_valid(gpio)) {
+			/* Skip GPIO if not present */
 			continue;
+		}
 
 		gpio_keys[n_buttons].type = info->event_type;
 		gpio_keys[n_buttons].code = info->event_code;
@@ -110,25 +120,19 @@ soc_button_device_create(struct platform_device *pdev,
 	gpio_keys_pdata->nbuttons = n_buttons;
 	gpio_keys_pdata->rep = autorepeat;
 
-	pd = platform_device_alloc("gpio-keys", PLATFORM_DEVID_AUTO);
-	if (!pd) {
-		error = -ENOMEM;
+	pd = platform_device_register_resndata(&pdev->dev, "gpio-keys",
+					       PLATFORM_DEVID_AUTO, NULL, 0,
+					       gpio_keys_pdata,
+					       sizeof(*gpio_keys_pdata));
+	error = PTR_ERR_OR_ZERO(pd);
+	if (error) {
+		dev_err(&pdev->dev,
+			"failed registering gpio-keys: %d\n", error);
 		goto err_free_mem;
 	}
 
-	error = platform_device_add_data(pd, gpio_keys_pdata,
-					 sizeof(*gpio_keys_pdata));
-	if (error)
-		goto err_free_pdev;
-
-	error = platform_device_add(pd);
-	if (error)
-		goto err_free_pdev;
-
 	return pd;
 
-err_free_pdev:
-	platform_device_put(pd);
 err_free_mem:
 	devm_kfree(&pdev->dev, gpio_keys_pdata);
 	return ERR_PTR(error);
@@ -309,23 +313,26 @@ static int soc_button_remove(struct platform_device *pdev)
 static int soc_button_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	const struct acpi_device_id *id;
-	struct soc_button_info *button_info;
+	const struct soc_device_data *device_data;
+	const struct soc_button_info *button_info;
 	struct soc_button_data *priv;
 	struct platform_device *pd;
 	int i;
 	int error;
 
-	id = acpi_match_device(dev->driver->acpi_match_table, dev);
-	if (!id)
-		return -ENODEV;
+	device_data = acpi_device_get_match_data(dev);
+	if (device_data && device_data->check) {
+		error = device_data->check(dev);
+		if (error)
+			return error;
+	}
 
-	if (!id->driver_data) {
+	if (device_data && device_data->button_info) {
+		button_info = device_data->button_info;
+	} else {
 		button_info = soc_button_get_button_info(dev);
 		if (IS_ERR(button_info))
 			return PTR_ERR(button_info);
-	} else {
-		button_info = (struct soc_button_info *)id->driver_data;
 	}
 
 	error = gpiod_count(dev, NULL);
@@ -357,7 +364,7 @@ static int soc_button_probe(struct platform_device *pdev)
 	if (!priv->children[0] && !priv->children[1])
 		return -ENODEV;
 
-	if (!id->driver_data)
+	if (!device_data || !device_data->button_info)
 		devm_kfree(dev, button_info);
 
 	return 0;
@@ -368,7 +375,7 @@ static int soc_button_probe(struct platform_device *pdev)
  * is defined in section 2.8.7.2 of "Windows ACPI Design Guide for SoC
  * Platforms"
  */
-static struct soc_button_info soc_button_PNP0C40[] = {
+static const struct soc_button_info soc_button_PNP0C40[] = {
 	{ "power", 0, EV_KEY, KEY_POWER, false, true },
 	{ "home", 1, EV_KEY, KEY_LEFTMETA, false, true },
 	{ "volume_up", 2, EV_KEY, KEY_VOLUMEUP, true, false },
@@ -377,9 +384,77 @@ static struct soc_button_info soc_button_PNP0C40[] = {
 	{ }
 };
 
+static const struct soc_device_data soc_device_PNP0C40 = {
+	.button_info = soc_button_PNP0C40,
+};
+
+/*
+ * Special device check for Surface Book 2 and Surface Pro (2017).
+ * Both, the Surface Pro 4 (surfacepro3_button.c) and the above mentioned
+ * devices use MSHW0040 for power and volume buttons, however the way they
+ * have to be addressed differs. Make sure that we only load this drivers
+ * for the correct devices by checking the OEM Platform Revision provided by
+ * the _DSM method.
+ */
+#define MSHW0040_DSM_REVISION		0x01
+#define MSHW0040_DSM_GET_OMPR		0x02	// get OEM Platform Revision
+static const guid_t MSHW0040_DSM_UUID =
+	GUID_INIT(0x6fd05c69, 0xcde3, 0x49f4, 0x95, 0xed, 0xab, 0x16, 0x65,
+		  0x49, 0x80, 0x35);
+
+static int soc_device_check_MSHW0040(struct device *dev)
+{
+	acpi_handle handle = ACPI_HANDLE(dev);
+	union acpi_object *result;
+	u64 oem_platform_rev = 0;	// valid revisions are nonzero
+
+	// get OEM platform revision
+	result = acpi_evaluate_dsm_typed(handle, &MSHW0040_DSM_UUID,
+					 MSHW0040_DSM_REVISION,
+					 MSHW0040_DSM_GET_OMPR, NULL,
+					 ACPI_TYPE_INTEGER);
+
+	if (result) {
+		oem_platform_rev = result->integer.value;
+		ACPI_FREE(result);
+	}
+
+	/*
+	 * If the revision is zero here, the _DSM evaluation has failed. This
+	 * indicates that we have a Pro 4 or Book 1 and this driver should not
+	 * be used.
+	 */
+	if (oem_platform_rev == 0)
+		return -ENODEV;
+
+	dev_dbg(dev, "OEM Platform Revision %llu\n", oem_platform_rev);
+
+	return 0;
+}
+
+/*
+ * Button infos for Microsoft Surface Book 2 and Surface Pro (2017).
+ * Obtained from DSDT/testing.
+ */
+static const struct soc_button_info soc_button_MSHW0040[] = {
+	{ "power", 0, EV_KEY, KEY_POWER, false, true },
+	{ "volume_up", 2, EV_KEY, KEY_VOLUMEUP, true, false },
+	{ "volume_down", 4, EV_KEY, KEY_VOLUMEDOWN, true, false },
+	{ }
+};
+
+static const struct soc_device_data soc_device_MSHW0040 = {
+	.button_info = soc_button_MSHW0040,
+	.check = soc_device_check_MSHW0040,
+};
+
 static const struct acpi_device_id soc_button_acpi_match[] = {
-	{ "PNP0C40", (unsigned long)soc_button_PNP0C40 },
+	{ "PNP0C40", (unsigned long)&soc_device_PNP0C40 },
 	{ "ACPI0011", 0 },
+
+	/* Microsoft Surface Devices (5th and 6th generation) */
+	{ "MSHW0040", (unsigned long)&soc_device_MSHW0040 },
+
 	{ }
 };
 
diff --git a/drivers/input/misc/stpmic1_onkey.c b/drivers/input/misc/stpmic1_onkey.c
index 7b49c9997df7..d8dc2f2f8000 100644
--- a/drivers/input/misc/stpmic1_onkey.c
+++ b/drivers/input/misc/stpmic1_onkey.c
@@ -61,18 +61,12 @@ static int stpmic1_onkey_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	onkey->irq_falling = platform_get_irq_byname(pdev, "onkey-falling");
-	if (onkey->irq_falling < 0) {
-		dev_err(dev, "failed: request IRQ onkey-falling %d\n",
-			onkey->irq_falling);
+	if (onkey->irq_falling < 0)
 		return onkey->irq_falling;
-	}
 
 	onkey->irq_rising = platform_get_irq_byname(pdev, "onkey-rising");
-	if (onkey->irq_rising < 0) {
-		dev_err(dev, "failed: request IRQ onkey-rising %d\n",
-			onkey->irq_rising);
+	if (onkey->irq_rising < 0)
 		return onkey->irq_rising;
-	}
 
 	if (!device_property_read_u32(dev, "power-off-time-sec", &val)) {
 		if (val > 0 && val <= 16) {
diff --git a/drivers/input/misc/tps65218-pwrbutton.c b/drivers/input/misc/tps65218-pwrbutton.c
index a4455bb12ae0..f011447c44fb 100644
--- a/drivers/input/misc/tps65218-pwrbutton.c
+++ b/drivers/input/misc/tps65218-pwrbutton.c
@@ -124,10 +124,8 @@ static int tps6521x_pb_probe(struct platform_device *pdev)
 	device_init_wakeup(dev, true);
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(dev, "No IRQ resource!\n");
+	if (irq < 0)
 		return -EINVAL;
-	}
 
 	error = devm_request_threaded_irq(dev, irq, NULL, tps6521x_pb_irq,
 					  IRQF_TRIGGER_RISING |
diff --git a/drivers/input/misc/twl6040-vibra.c b/drivers/input/misc/twl6040-vibra.c
index 93235a007d07..bf6644927630 100644
--- a/drivers/input/misc/twl6040-vibra.c
+++ b/drivers/input/misc/twl6040-vibra.c
@@ -272,10 +272,8 @@ static int twl6040_vibra_probe(struct platform_device *pdev)
 	}
 
 	info->irq = platform_get_irq(pdev, 0);
-	if (info->irq < 0) {
-		dev_err(info->dev, "invalid irq\n");
+	if (info->irq < 0)
 		return -EINVAL;
-	}
 
 	error = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
 					  twl6040_vib_irq_handler,
diff --git a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h
index f4bab629739c..0a1048cf23f6 100644
--- a/drivers/input/mouse/alps.h
+++ b/drivers/input/mouse/alps.h
@@ -323,18 +323,7 @@ struct alps_data {
 
 #define ALPS_QUIRK_TRACKSTICK_BUTTONS	1 /* trakcstick buttons in trackstick packet */
 
-#ifdef CONFIG_MOUSE_PS2_ALPS
 int alps_detect(struct psmouse *psmouse, bool set_properties);
 int alps_init(struct psmouse *psmouse);
-#else
-inline int alps_detect(struct psmouse *psmouse, bool set_properties)
-{
-	return -ENOSYS;
-}
-inline int alps_init(struct psmouse *psmouse)
-{
-	return -ENOSYS;
-}
-#endif /* CONFIG_MOUSE_PS2_ALPS */
 
 #endif
diff --git a/drivers/input/mouse/byd.h b/drivers/input/mouse/byd.h
index 8cb90d904186..ff2771e2dd2e 100644
--- a/drivers/input/mouse/byd.h
+++ b/drivers/input/mouse/byd.h
@@ -2,18 +2,7 @@
 #ifndef _BYD_H
 #define _BYD_H
 
-#ifdef CONFIG_MOUSE_PS2_BYD
 int byd_detect(struct psmouse *psmouse, bool set_properties);
 int byd_init(struct psmouse *psmouse);
-#else
-static inline int byd_detect(struct psmouse *psmouse, bool set_properties)
-{
-	return -ENOSYS;
-}
-static inline int byd_init(struct psmouse *psmouse)
-{
-	return -ENOSYS;
-}
-#endif /* CONFIG_MOUSE_PS2_BYD */
 
 #endif /* _BYD_H */
diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c
index dfd3873513e4..c675f156948b 100644
--- a/drivers/input/mouse/cyapa.c
+++ b/drivers/input/mouse/cyapa.c
@@ -1238,13 +1238,6 @@ static const struct attribute_group cyapa_sysfs_group = {
 	.attrs = cyapa_sysfs_entries,
 };
 
-static void cyapa_remove_sysfs_group(void *data)
-{
-	struct cyapa *cyapa = data;
-
-	sysfs_remove_group(&cyapa->client->dev.kobj, &cyapa_sysfs_group);
-}
-
 static void cyapa_disable_regulator(void *data)
 {
 	struct cyapa *cyapa = data;
@@ -1312,19 +1305,12 @@ static int cyapa_probe(struct i2c_client *client,
 		return error;
 	}
 
-	error = sysfs_create_group(&dev->kobj, &cyapa_sysfs_group);
+	error = devm_device_add_group(dev, &cyapa_sysfs_group);
 	if (error) {
 		dev_err(dev, "failed to create sysfs entries: %d\n", error);
 		return error;
 	}
 
-	error = devm_add_action(dev, cyapa_remove_sysfs_group, cyapa);
-	if (error) {
-		cyapa_remove_sysfs_group(cyapa);
-		dev_err(dev, "failed to add sysfs cleanup action: %d\n", error);
-		return error;
-	}
-
 	error = cyapa_prepare_wakeup_controls(cyapa);
 	if (error) {
 		dev_err(dev, "failed to prepare wakeup controls: %d\n", error);
diff --git a/drivers/input/mouse/cypress_ps2.h b/drivers/input/mouse/cypress_ps2.h
index 1eaddd818004..bb4979d06bf9 100644
--- a/drivers/input/mouse/cypress_ps2.h
+++ b/drivers/input/mouse/cypress_ps2.h
@@ -170,18 +170,7 @@ struct cytp_data {
 };
 
 
-#ifdef CONFIG_MOUSE_PS2_CYPRESS
 int cypress_detect(struct psmouse *psmouse, bool set_properties);
 int cypress_init(struct psmouse *psmouse);
-#else
-inline int cypress_detect(struct psmouse *psmouse, bool set_properties)
-{
-	return -ENOSYS;
-}
-inline int cypress_init(struct psmouse *psmouse)
-{
-	return -ENOSYS;
-}
-#endif /* CONFIG_MOUSE_PS2_CYPRESS */
 
 #endif  /* _CYPRESS_PS2_H */
diff --git a/drivers/input/mouse/elan_i2c_core.c b/drivers/input/mouse/elan_i2c_core.c
index d9b103a81a79..8719da540383 100644
--- a/drivers/input/mouse/elan_i2c_core.c
+++ b/drivers/input/mouse/elan_i2c_core.c
@@ -1138,13 +1138,6 @@ static void elan_disable_regulator(void *_data)
 	regulator_disable(data->vcc);
 }
 
-static void elan_remove_sysfs_groups(void *_data)
-{
-	struct elan_tp_data *data = _data;
-
-	sysfs_remove_groups(&data->client->dev.kobj, elan_sysfs_groups);
-}
-
 static int elan_probe(struct i2c_client *client,
 		      const struct i2c_device_id *dev_id)
 {
@@ -1194,9 +1187,8 @@ static int elan_probe(struct i2c_client *client,
 		return error;
 	}
 
-	error = devm_add_action(dev, elan_disable_regulator, data);
+	error = devm_add_action_or_reset(dev, elan_disable_regulator, data);
 	if (error) {
-		regulator_disable(data->vcc);
 		dev_err(dev, "Failed to add disable regulator action: %d\n",
 			error);
 		return error;
@@ -1269,20 +1261,12 @@ static int elan_probe(struct i2c_client *client,
 		return error;
 	}
 
-	error = sysfs_create_groups(&dev->kobj, elan_sysfs_groups);
+	error = devm_device_add_groups(dev, elan_sysfs_groups);
 	if (error) {
 		dev_err(dev, "failed to create sysfs attributes: %d\n", error);
 		return error;
 	}
 
-	error = devm_add_action(dev, elan_remove_sysfs_groups, data);
-	if (error) {
-		elan_remove_sysfs_groups(data);
-		dev_err(dev, "Failed to add sysfs cleanup action: %d\n",
-			error);
-		return error;
-	}
-
 	error = input_register_device(data->input);
 	if (error) {
 		dev_err(dev, "failed to register input device: %d\n", error);
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index 46343998522b..e0a3e59d4f1b 100644
--- a/drivers/input/mouse/elantech.h
+++ b/drivers/input/mouse/elantech.h
@@ -184,32 +184,18 @@ struct elantech_data {
 	void (*original_set_rate)(struct psmouse *psmouse, unsigned int rate);
 };
 
-#ifdef CONFIG_MOUSE_PS2_ELANTECH
 int elantech_detect(struct psmouse *psmouse, bool set_properties);
 int elantech_init_ps2(struct psmouse *psmouse);
+
+#ifdef CONFIG_MOUSE_PS2_ELANTECH
 int elantech_init(struct psmouse *psmouse);
 #else
-static inline int elantech_detect(struct psmouse *psmouse, bool set_properties)
-{
-	return -ENOSYS;
-}
 static inline int elantech_init(struct psmouse *psmouse)
 {
 	return -ENOSYS;
 }
-static inline int elantech_init_ps2(struct psmouse *psmouse)
-{
-	return -ENOSYS;
-}
 #endif /* CONFIG_MOUSE_PS2_ELANTECH */
 
-#if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS)
 int elantech_init_smbus(struct psmouse *psmouse);
-#else
-static inline int elantech_init_smbus(struct psmouse *psmouse)
-{
-	return -ENOSYS;
-}
-#endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */
 
 #endif
diff --git a/drivers/input/mouse/hgpk.h b/drivers/input/mouse/hgpk.h
index 98b7b384229b..ce041591f1a8 100644
--- a/drivers/input/mouse/hgpk.h
+++ b/drivers/input/mouse/hgpk.h
@@ -47,22 +47,15 @@ struct hgpk_data {
 	int xsaw_secondary, ysaw_secondary; /* jumpiness detection */
 };
 
-#ifdef CONFIG_MOUSE_PS2_OLPC
-void hgpk_module_init(void);
 int hgpk_detect(struct psmouse *psmouse, bool set_properties);
 int hgpk_init(struct psmouse *psmouse);
+
+#ifdef CONFIG_MOUSE_PS2_OLPC
+void hgpk_module_init(void);
 #else
 static inline void hgpk_module_init(void)
 {
 }
-static inline int hgpk_detect(struct psmouse *psmouse, bool set_properties)
-{
-	return -ENODEV;
-}
-static inline int hgpk_init(struct psmouse *psmouse)
-{
-	return -ENODEV;
-}
 #endif
 
 #endif
diff --git a/drivers/input/mouse/lifebook.h b/drivers/input/mouse/lifebook.h
index 573f2ca1983d..d989cca62dd6 100644
--- a/drivers/input/mouse/lifebook.h
+++ b/drivers/input/mouse/lifebook.h
@@ -8,22 +8,15 @@
 #ifndef _LIFEBOOK_H
 #define _LIFEBOOK_H
 
-#ifdef CONFIG_MOUSE_PS2_LIFEBOOK
-void lifebook_module_init(void);
 int lifebook_detect(struct psmouse *psmouse, bool set_properties);
 int lifebook_init(struct psmouse *psmouse);
+
+#ifdef CONFIG_MOUSE_PS2_LIFEBOOK
+void lifebook_module_init(void);
 #else
 static inline void lifebook_module_init(void)
 {
 }
-static inline int lifebook_detect(struct psmouse *psmouse, bool set_properties)
-{
-	return -ENOSYS;
-}
-static inline int lifebook_init(struct psmouse *psmouse)
-{
-	return -ENOSYS;
-}
 #endif
 
 #endif
diff --git a/drivers/input/mouse/logips2pp.h b/drivers/input/mouse/logips2pp.h
index 5f9344135f70..df885c4874df 100644
--- a/drivers/input/mouse/logips2pp.h
+++ b/drivers/input/mouse/logips2pp.h
@@ -8,13 +8,6 @@
 #ifndef _LOGIPS2PP_H
 #define _LOGIPS2PP_H
 
-#ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
 int ps2pp_detect(struct psmouse *psmouse, bool set_properties);
-#else
-static inline int ps2pp_detect(struct psmouse *psmouse, bool set_properties)
-{
-	return -ENOSYS;
-}
-#endif /* CONFIG_MOUSE_PS2_LOGIPS2PP */
 
 #endif
diff --git a/drivers/input/mouse/pxa930_trkball.c b/drivers/input/mouse/pxa930_trkball.c
index 87bac8cff6f7..41acde60b60f 100644
--- a/drivers/input/mouse/pxa930_trkball.c
+++ b/drivers/input/mouse/pxa930_trkball.c
@@ -147,10 +147,8 @@ static int pxa930_trkball_probe(struct platform_device *pdev)
 	int irq, error;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "failed to get trkball irq\n");
+	if (irq < 0)
 		return -ENXIO;
-	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
diff --git a/drivers/input/mouse/sentelic.h b/drivers/input/mouse/sentelic.h
index dc88a93adf85..02cac0e7ad63 100644
--- a/drivers/input/mouse/sentelic.h
+++ b/drivers/input/mouse/sentelic.h
@@ -106,19 +106,8 @@ struct fsp_data {
 	unsigned int	last_mt_fgr;	/* Last seen finger(multitouch) */
 };
 
-#ifdef CONFIG_MOUSE_PS2_SENTELIC
 extern int fsp_detect(struct psmouse *psmouse, bool set_properties);
 extern int fsp_init(struct psmouse *psmouse);
-#else
-static inline int fsp_detect(struct psmouse *psmouse, bool set_properties)
-{
-	return -ENOSYS;
-}
-static inline int fsp_init(struct psmouse *psmouse)
-{
-	return -ENOSYS;
-}
-#endif
 
 #endif	/* __KERNEL__ */
 
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 46bbe99d6511..56fae3472114 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -193,7 +193,7 @@ static const char * const forcepad_pnp_ids[] = {
 };
 
 /*
- * Send a command to the synpatics touchpad by special commands
+ * Send a command to the synaptics touchpad by special commands
  */
 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
 {
diff --git a/drivers/input/mouse/touchkit_ps2.h b/drivers/input/mouse/touchkit_ps2.h
index 5acb76464a5b..c808fe6c782f 100644
--- a/drivers/input/mouse/touchkit_ps2.h
+++ b/drivers/input/mouse/touchkit_ps2.h
@@ -9,14 +9,6 @@
 #ifndef _TOUCHKIT_PS2_H
 #define _TOUCHKIT_PS2_H
 
-#ifdef CONFIG_MOUSE_PS2_TOUCHKIT
 int touchkit_ps2_detect(struct psmouse *psmouse, bool set_properties);
-#else
-static inline int touchkit_ps2_detect(struct psmouse *psmouse,
-				      bool set_properties)
-{
-	return -ENOSYS;
-}
-#endif /* CONFIG_MOUSE_PS2_TOUCHKIT */
 
 #endif
diff --git a/drivers/input/mouse/trackpoint.h b/drivers/input/mouse/trackpoint.h
index 77110f3ec21d..5cb93ed26085 100644
--- a/drivers/input/mouse/trackpoint.h
+++ b/drivers/input/mouse/trackpoint.h
@@ -155,14 +155,6 @@ struct trackpoint_data {
 	bool ext_dev;
 };
 
-#ifdef CONFIG_MOUSE_PS2_TRACKPOINT
 int trackpoint_detect(struct psmouse *psmouse, bool set_properties);
-#else
-static inline int trackpoint_detect(struct psmouse *psmouse,
-				    bool set_properties)
-{
-	return -ENOSYS;
-}
-#endif /* CONFIG_MOUSE_PS2_TRACKPOINT */
 
 #endif /* _TRACKPOINT_H */
diff --git a/drivers/input/mouse/vmmouse.h b/drivers/input/mouse/vmmouse.h
index 774549a12930..90157aecade7 100644
--- a/drivers/input/mouse/vmmouse.h
+++ b/drivers/input/mouse/vmmouse.h
@@ -8,20 +8,9 @@
 #ifndef _VMMOUSE_H
 #define _VMMOUSE_H
 
-#ifdef CONFIG_MOUSE_PS2_VMMOUSE
 #define VMMOUSE_PSNAME  "VirtualPS/2"
 
 int vmmouse_detect(struct psmouse *psmouse, bool set_properties);
 int vmmouse_init(struct psmouse *psmouse);
-#else
-static inline int vmmouse_detect(struct psmouse *psmouse, bool set_properties)
-{
-	return -ENOSYS;
-}
-static inline int vmmouse_init(struct psmouse *psmouse)
-{
-	return -ENOSYS;
-}
-#endif
 
 #endif
diff --git a/drivers/input/rmi4/rmi_2d_sensor.c b/drivers/input/rmi4/rmi_2d_sensor.c
index ea549efe4bc4..b7fe6eb35a4e 100644
--- a/drivers/input/rmi4/rmi_2d_sensor.c
+++ b/drivers/input/rmi4/rmi_2d_sensor.c
@@ -204,7 +204,6 @@ static void rmi_2d_sensor_set_input_params(struct rmi_2d_sensor *sensor)
 	if (sensor->topbuttonpad)
 		set_bit(INPUT_PROP_TOPBUTTONPAD, input->propbit);
 }
-EXPORT_SYMBOL_GPL(rmi_2d_sensor_set_input_params);
 
 int rmi_2d_sensor_configure_input(struct rmi_function *fn,
 					struct rmi_2d_sensor *sensor)
diff --git a/drivers/input/serio/arc_ps2.c b/drivers/input/serio/arc_ps2.c
index 443194a2b9e3..0af9fba5d16d 100644
--- a/drivers/input/serio/arc_ps2.c
+++ b/drivers/input/serio/arc_ps2.c
@@ -187,10 +187,8 @@ static int arc_ps2_probe(struct platform_device *pdev)
 	int error, id, i;
 
 	irq = platform_get_irq_byname(pdev, "arc_ps2_irq");
-	if (irq < 0) {
-		dev_err(&pdev->dev, "no IRQ defined\n");
+	if (irq < 0)
 		return -EINVAL;
-	}
 
 	arc_ps2 = devm_kzalloc(&pdev->dev, sizeof(struct arc_ps2_data),
 				GFP_KERNEL);
diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index b695094290ab..20ff2bed3917 100644
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -432,6 +432,20 @@ static int i8042_start(struct serio *serio)
 {
 	struct i8042_port *port = serio->port_data;
 
+	device_set_wakeup_capable(&serio->dev, true);
+
+	/*
+	 * On platforms using suspend-to-idle, allow the keyboard to
+	 * wake up the system from sleep by enabling keyboard wakeups
+	 * by default.  This is consistent with keyboard wakeup
+	 * behavior on many platforms using suspend-to-RAM (ACPI S3)
+	 * by default.
+	 */
+	if (pm_suspend_default_s2idle() &&
+	    serio == i8042_ports[I8042_KBD_PORT_NO].serio) {
+		device_set_wakeup_enable(&serio->dev, true);
+	}
+
 	spin_lock_irq(&i8042_lock);
 	port->exists = true;
 	spin_unlock_irq(&i8042_lock);
@@ -1397,17 +1411,6 @@ static void __init i8042_register_ports(void)
 			(unsigned long) I8042_COMMAND_REG,
 			i8042_ports[i].irq);
 		serio_register_port(serio);
-		device_set_wakeup_capable(&serio->dev, true);
-
-		/*
-		 * On platforms using suspend-to-idle, allow the keyboard to
-		 * wake up the system from sleep by enabling keyboard wakeups
-		 * by default.  This is consistent with keyboard wakeup
-		 * behavior on many platforms using suspend-to-RAM (ACPI S3)
-		 * by default.
-		 */
-		if (pm_suspend_default_s2idle() && i == I8042_KBD_PORT_NO)
-			device_set_wakeup_enable(&serio->dev, true);
 	}
 }
 
diff --git a/drivers/input/serio/ps2-gpio.c b/drivers/input/serio/ps2-gpio.c
index e0f18469d01b..8970b49ea09a 100644
--- a/drivers/input/serio/ps2-gpio.c
+++ b/drivers/input/serio/ps2-gpio.c
@@ -369,8 +369,6 @@ static int ps2_gpio_probe(struct platform_device *pdev)
 
 	drvdata->irq = platform_get_irq(pdev, 0);
 	if (drvdata->irq < 0) {
-		dev_err(dev, "failed to get irq from platform resource: %d\n",
-			drvdata->irq);
 		error = drvdata->irq;
 		goto err_free_serio;
 	}
diff --git a/drivers/input/touchscreen/88pm860x-ts.c b/drivers/input/touchscreen/88pm860x-ts.c
index 1d1bbc8da949..81a3ea4b9a3d 100644
--- a/drivers/input/touchscreen/88pm860x-ts.c
+++ b/drivers/input/touchscreen/88pm860x-ts.c
@@ -185,10 +185,8 @@ static int pm860x_touch_probe(struct platform_device *pdev)
 	int irq, ret, res_x = 0, data = 0;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "No IRQ resource!\n");
+	if (irq < 0)
 		return -EINVAL;
-	}
 
 	if (pm860x_touch_dt_init(pdev, chip, &res_x)) {
 		if (pdata) {
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index fb91f2d4049e..46ad9090493b 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -1112,15 +1112,6 @@ config TOUCHSCREEN_TSC2007_IIO
 	  or ambient light monitoring), temperature and raw input
 	  values.
 
-config TOUCHSCREEN_W90X900
-	tristate "W90P910 touchscreen driver"
-	depends on ARCH_W90X900
-	help
-	  Say Y here if you have a W90P910 based touchscreen.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called w90p910_ts.
-
 config TOUCHSCREEN_PCAP
 	tristate "Motorola PCAP touchscreen"
 	depends on EZX_PCAP
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 084a596a0c8b..94c6162409b3 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -102,7 +102,6 @@ wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9712)	+= wm9712.o
 wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9713)	+= wm9713.o
 obj-$(CONFIG_TOUCHSCREEN_WM97XX_MAINSTONE)	+= mainstone-wm97xx.o
 obj-$(CONFIG_TOUCHSCREEN_WM97XX_ZYLONITE)	+= zylonite-wm97xx.o
-obj-$(CONFIG_TOUCHSCREEN_W90X900)	+= w90p910_ts.o
 obj-$(CONFIG_TOUCHSCREEN_SX8654)	+= sx8654.o
 obj-$(CONFIG_TOUCHSCREEN_TPS6507X)	+= tps6507x-ts.o
 obj-$(CONFIG_TOUCHSCREEN_ZET6223)	+= zet6223.o
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index accbbe8d2966..51ddb204ca1b 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -20,6 +20,7 @@
 #include <linux/sched.h>
 #include <linux/delay.h>
 #include <linux/input.h>
+#include <linux/input/touchscreen.h>
 #include <linux/interrupt.h>
 #include <linux/slab.h>
 #include <linux/pm.h>
@@ -129,6 +130,8 @@ struct ads7846 {
 
 	u16			penirq_recheck_delay_usecs;
 
+	struct touchscreen_properties core_prop;
+
 	struct mutex		lock;
 	bool			stopped;	/* P: lock */
 	bool			disabled;	/* P: lock */
@@ -823,17 +826,13 @@ static void ads7846_report_state(struct ads7846 *ts)
 	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 = true;
 			dev_vdbg(&ts->spi->dev, "DOWN\n");
 		}
 
-		input_report_abs(input, ABS_X, x);
-		input_report_abs(input, ABS_Y, y);
+		touchscreen_report_pos(input, &ts->core_prop, x, y, false);
 		input_report_abs(input, ABS_PRESSURE, ts->pressure_max - Rt);
 
 		input_sync(input);
@@ -1185,6 +1184,7 @@ static const struct ads7846_platform_data *ads7846_probe_dt(struct device *dev)
 	struct ads7846_platform_data *pdata;
 	struct device_node *node = dev->of_node;
 	const struct of_device_id *match;
+	u32 value;
 
 	if (!node) {
 		dev_err(dev, "Device does not have associated DT data\n");
@@ -1223,10 +1223,18 @@ static const struct ads7846_platform_data *ads7846_probe_dt(struct device *dev)
 	of_property_read_u16(node, "ti,x-max", &pdata->x_max);
 	of_property_read_u16(node, "ti,y-max", &pdata->y_max);
 
+	/*
+	 * touchscreen-max-pressure gets parsed during
+	 * touchscreen_parse_properties()
+	 */
 	of_property_read_u16(node, "ti,pressure-min", &pdata->pressure_min);
+	if (!of_property_read_u32(node, "touchscreen-min-pressure", &value))
+		pdata->pressure_min = (u16) value;
 	of_property_read_u16(node, "ti,pressure-max", &pdata->pressure_max);
 
 	of_property_read_u16(node, "ti,debounce-max", &pdata->debounce_max);
+	if (!of_property_read_u32(node, "touchscreen-average-samples", &value))
+		pdata->debounce_max = (u16) value;
 	of_property_read_u16(node, "ti,debounce-tol", &pdata->debounce_tol);
 	of_property_read_u16(node, "ti,debounce-rep", &pdata->debounce_rep);
 
@@ -1309,10 +1317,7 @@ static int ads7846_probe(struct spi_device *spi)
 	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;
-
 	ts->vref_mv = pdata->vref_mv;
-	ts->swap_xy = pdata->swap_xy;
 
 	if (pdata->filter != NULL) {
 		if (pdata->filter_init != NULL) {
@@ -1364,6 +1369,23 @@ static int ads7846_probe(struct spi_device *spi)
 	input_set_abs_params(input_dev, ABS_PRESSURE,
 			pdata->pressure_min, pdata->pressure_max, 0, 0);
 
+	/*
+	 * Parse common framework properties. Must be done here to ensure the
+	 * correct behaviour in case of using the legacy vendor bindings. The
+	 * general binding value overrides the vendor specific one.
+	 */
+	touchscreen_parse_properties(ts->input, false, &ts->core_prop);
+	ts->pressure_max = input_abs_get_max(input_dev, ABS_PRESSURE) ? : ~0;
+
+	/*
+	 * Check if legacy ti,swap-xy binding is used instead of
+	 * touchscreen-swapped-x-y
+	 */
+	if (!ts->core_prop.swap_x_y && pdata->swap_xy) {
+		swap(input_dev->absinfo[ABS_X], input_dev->absinfo[ABS_Y]);
+		ts->core_prop.swap_x_y = true;
+	}
+
 	ads7846_setup_spi_msg(ts, pdata);
 
 	ts->reg = regulator_get(&spi->dev, "vcc");
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 4a5f482cf1af..24c4b691b1c9 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -2990,8 +2990,7 @@ static int mxt_parse_device_properties(struct mxt_data *data)
 	int error;
 
 	if (device_property_present(dev, keymap_property)) {
-		n_keys = device_property_read_u32_array(dev, keymap_property,
-							NULL, 0);
+		n_keys = device_property_count_u32(dev, keymap_property);
 		if (n_keys <= 0) {
 			error = n_keys < 0 ? n_keys : -EINVAL;
 			dev_err(dev, "invalid/malformed '%s' property: %d\n",
diff --git a/drivers/input/touchscreen/bcm_iproc_tsc.c b/drivers/input/touchscreen/bcm_iproc_tsc.c
index 4d11b27c7c43..7de1fd24ce36 100644
--- a/drivers/input/touchscreen/bcm_iproc_tsc.c
+++ b/drivers/input/touchscreen/bcm_iproc_tsc.c
@@ -489,10 +489,8 @@ static int iproc_ts_probe(struct platform_device *pdev)
 
 	/* get interrupt */
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "platform_get_irq failed: %d\n", irq);
+	if (irq < 0)
 		return irq;
-	}
 
 	error = devm_request_irq(&pdev->dev, irq,
 				 iproc_touchscreen_interrupt,
diff --git a/drivers/input/touchscreen/bu21013_ts.c b/drivers/input/touchscreen/bu21013_ts.c
index 1d703e230ac3..2f1f0d7607f8 100644
--- a/drivers/input/touchscreen/bu21013_ts.c
+++ b/drivers/input/touchscreen/bu21013_ts.c
@@ -4,21 +4,21 @@
  * Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson
  */
 
-#include <linux/kernel.h>
+#include <linux/bitops.h>
 #include <linux/delay.h>
-#include <linux/interrupt.h>
+#include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
-#include <linux/workqueue.h>
 #include <linux/input.h>
-#include <linux/input/bu21013.h>
-#include <linux/slab.h>
-#include <linux/regulator/consumer.h>
+#include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/gpio.h>
-#include <linux/of.h>
-#include <linux/of_gpio.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/types.h>
 
-#define PEN_DOWN_INTR	0
 #define MAX_FINGERS	2
 #define RESET_DELAY	30
 #define PENUP_TIMEOUT	(10)
@@ -137,69 +137,63 @@
 #define DRIVER_TP	"bu21013_tp"
 
 /**
- * struct bu21013_ts_data - touch panel data structure
+ * struct bu21013_ts - 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
+ * @props: the device coordinate transformation properties
  * @regulator: pointer to the Regulator used for touch screen
+ * @cs_gpiod: chip select GPIO line
+ * @int_gpiod: touch interrupt GPIO line
+ * @touch_x_max: maximum X coordinate reported by the device
+ * @touch_y_max: maximum Y coordinate reported by the device
+ * @x_flip: indicates that the driver should invert X coordinate before
+ *	reporting
+ * @y_flip: indicates that the driver should invert Y coordinate before
+ *	reporting
+ * @touch_stopped: touch stop flag
  *
  * Touch panel device data structure
  */
-struct bu21013_ts_data {
+struct bu21013_ts {
 	struct i2c_client *client;
-	wait_queue_head_t wait;
-	const struct bu21013_platform_device *chip;
 	struct input_dev *in_dev;
+	struct touchscreen_properties props;
 	struct regulator *regulator;
-	unsigned int irq;
-	unsigned int intr_pin;
+	struct gpio_desc *cs_gpiod;
+	struct gpio_desc *int_gpiod;
+	u32 touch_x_max;
+	u32 touch_y_max;
+	bool x_flip;
+	bool y_flip;
 	bool touch_stopped;
 };
 
-/**
- * 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)
+static int bu21013_read_block_data(struct bu21013_ts *ts, 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);
+		ret = i2c_smbus_read_i2c_block_data(ts->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)
+static int bu21013_do_touch_report(struct bu21013_ts *ts)
 {
-	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)
+	struct input_dev *input = ts->in_dev;
+	struct input_mt_pos pos[MAX_FINGERS];
+	int slots[MAX_FINGERS];
+	u8 buf[LENGTH_OF_BUFFER];
+	bool has_x_sensors, has_y_sensors;
+	int finger_down_count = 0;
+	int i;
+
+	if (bu21013_read_block_data(ts, buf) < 0)
 		return -EINVAL;
 
 	has_x_sensors = hweight32(buf[0] & BU21013_SENSORS_EN_0_7);
@@ -209,501 +203,411 @@ static int bu21013_do_touch_report(struct bu21013_ts_data *data)
 		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;
-		}
+		const u8 *data = &buf[4 * i + 3];
+		unsigned int x, y;
+
+		x = data[0] << SHIFT_2 | (data[1] & MASK_BITS);
+		y = data[2] << SHIFT_2 | (data[3] & MASK_BITS);
+		if (x != 0 && y != 0)
+			touchscreen_set_mt_pos(&pos[finger_down_count++],
+					       &ts->props, x, y);
+	}
 
-		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);
+	if (finger_down_count == 2 &&
+	    (abs(pos[0].x - pos[1].x) < DELTA_MIN ||
+	     abs(pos[0].y - pos[1].y) < DELTA_MIN)) {
+		return 0;
+	}
+
+	input_mt_assign_slots(input, slots, pos, finger_down_count, DELTA_MIN);
+	for (i = 0; i < finger_down_count; i++) {
+		input_mt_slot(input, slots[i]);
+		input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
+		input_report_abs(input, ABS_MT_POSITION_X, pos[i].x);
+		input_report_abs(input, ABS_MT_POSITION_Y, pos[i].y);
+	}
 
-	input_sync(data->in_dev);
+	input_mt_sync_frame(input);
+	input_sync(input);
 
 	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;
+	struct bu21013_ts *ts = device_data;
+	int keep_polling;
+	int error;
 
 	do {
-		retval = bu21013_do_touch_report(data);
-		if (retval < 0) {
-			dev_err(&i2c->dev, "bu21013_do_touch_report failed\n");
-			return IRQ_NONE;
+		error = bu21013_do_touch_report(ts);
+		if (error) {
+			dev_err(&ts->client->dev, "%s failed\n", __func__);
+			break;
 		}
 
-		data->intr_pin = gpio_get_value(data->chip->touch_pin);
-		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);
+		if (unlikely(ts->touch_stopped))
+			break;
+
+		keep_polling = ts->int_gpiod ?
+			gpiod_get_value(ts->int_gpiod) : false;
+		if (keep_polling)
+			usleep_range(2000, 2500);
+	} while (keep_polling);
 
 	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)
+static int bu21013_init_chip(struct bu21013_ts *ts)
 {
-	int retval;
-	struct i2c_client *i2c = data->client;
+	struct i2c_client *client = ts->client;
+	int error;
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_RESET_REG,
+					  BU21013_RESET_ENABLE);
+	if (error) {
+		dev_err(&client->dev, "BU21013_RESET reg write failed\n");
+		return error;
 	}
 	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_SENSOR_0_7_REG,
+					  BU21013_SENSORS_EN_0_7);
+	if (error) {
+		dev_err(&client->dev, "BU21013_SENSOR_0_7 reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_SENSOR_8_15_REG,
+					  BU21013_SENSORS_EN_8_15);
+	if (error) {
+		dev_err(&client->dev, "BU21013_SENSOR_8_15 reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_SENSOR_16_23_REG,
+					  BU21013_SENSORS_EN_16_23);
+	if (error) {
+		dev_err(&client->dev, "BU21013_SENSOR_16_23 reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_POS_MODE1_REG,
+					  BU21013_POS_MODE1_0 |
+						BU21013_POS_MODE1_1);
+	if (error) {
+		dev_err(&client->dev, "BU21013_POS_MODE1 reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, 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 (error) {
+		dev_err(&client->dev, "BU21013_POS_MODE2 reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_CLK_MODE_REG,
+					  BU21013_CLK_MODE_DIV |
+						BU21013_CLK_MODE_CALIB);
+	if (error) {
+		dev_err(&client->dev, "BU21013_CLK_MODE reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_IDLE_REG,
+					  BU21013_IDLET_0 |
+						BU21013_IDLE_INTERMIT_EN);
+	if (error) {
+		dev_err(&client->dev, "BU21013_IDLE reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_INT_MODE_REG,
+					  BU21013_INT_MODE_LEVEL);
+	if (error) {
+		dev_err(&client->dev, "BU21013_INT_MODE reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_FILTER_REG,
+					  BU21013_DELTA_0_6 |
+						BU21013_FILTER_EN);
+	if (error) {
+		dev_err(&client->dev, "BU21013_FILTER reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_TH_ON_REG,
+					  BU21013_TH_ON_5);
+	if (error) {
+		dev_err(&client->dev, "BU21013_TH_ON reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_TH_OFF_REG,
+					  BU21013_TH_OFF_4 | BU21013_TH_OFF_3);
+	if (error) {
+		dev_err(&client->dev, "BU21013_TH_OFF reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_GAIN_REG,
+					  BU21013_GAIN_0 | BU21013_GAIN_1);
+	if (error) {
+		dev_err(&client->dev, "BU21013_GAIN reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_OFFSET_MODE_REG,
+					  BU21013_OFFSET_MODE_DEFAULT);
+	if (error) {
+		dev_err(&client->dev, "BU21013_OFFSET_MODE reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_XY_EDGE_REG,
+					  BU21013_X_EDGE_0 |
+						BU21013_X_EDGE_2 |
+						BU21013_Y_EDGE_1 |
+						BU21013_Y_EDGE_3);
+	if (error) {
+		dev_err(&client->dev, "BU21013_XY_EDGE reg write failed\n");
+		return error;
 	}
 
-	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;
+	error = i2c_smbus_write_byte_data(client, BU21013_DONE_REG,
+					  BU21013_DONE);
+	if (error) {
+		dev_err(&client->dev, "BU21013_REG_DONE reg write failed\n");
+		return error;
 	}
 
 	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->irq, bu21013_data);
-}
-
-/**
- * bu21013_cs_disable() - deconfigures the touch panel controller
- * @bu21013_data: device structure pointer
- *
- * This function is used to deconfigure the chip selection
- * for touch panel controller.
- */
-static void bu21013_cs_disable(struct bu21013_ts_data *bu21013_data)
+static void bu21013_power_off(void *_ts)
 {
-	int error;
+	struct bu21013_ts *ts = _ts;
 
-	error = gpio_direction_output(bu21013_data->chip->cs_pin, 0);
-	if (error < 0)
-		dev_warn(&bu21013_data->client->dev,
-			 "%s: gpio direction failed, error: %d\n",
-			 __func__, error);
-	else
-		gpio_set_value(bu21013_data->chip->cs_pin, 0);
-
-	gpio_free(bu21013_data->chip->cs_pin);
+	regulator_disable(ts->regulator);
 }
 
-#ifdef CONFIG_OF
-static const struct bu21013_platform_device *
-bu21013_parse_dt(struct device *dev)
+static void bu21013_disable_chip(void *_ts)
 {
-	struct device_node *np = dev->of_node;
-	struct bu21013_platform_device *pdata;
+	struct bu21013_ts *ts = _ts;
 
-	if (!np) {
-		dev_err(dev, "no device tree or platform data\n");
-		return ERR_PTR(-EINVAL);
-	}
-
-	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
-	if (!pdata)
-		return ERR_PTR(-ENOMEM);
-
-	pdata->y_flip = pdata->x_flip = false;
-
-	pdata->x_flip = of_property_read_bool(np, "rohm,flip-x");
-	pdata->y_flip = of_property_read_bool(np, "rohm,flip-y");
-
-	of_property_read_u32(np, "rohm,touch-max-x", &pdata->touch_x_max);
-	of_property_read_u32(np, "rohm,touch-max-y", &pdata->touch_y_max);
-
-	pdata->touch_pin = of_get_named_gpio(np, "touch-gpio", 0);
-	pdata->cs_pin = of_get_named_gpio(np, "reset-gpio", 0);
-
-	pdata->ext_clk = false;
-
-	return pdata;
-}
-#else
-static inline const struct bu21013_platform_device *
-bu21013_parse_dt(struct device *dev)
-{
-	dev_err(dev, "no platform data available\n");
-	return ERR_PTR(-EINVAL);
+	gpiod_set_value(ts->cs_gpiod, 0);
 }
-#endif
 
-/**
- * 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 bu21013_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
-	const struct bu21013_platform_device *pdata =
-					dev_get_platdata(&client->dev);
-	struct bu21013_ts_data *bu21013_data;
+	struct bu21013_ts *ts;
 	struct input_dev *in_dev;
+	struct input_absinfo *info;
+	u32 max_x = 0, max_y = 0;
 	int error;
 
 	if (!i2c_check_functionality(client->adapter,
-					I2C_FUNC_SMBUS_BYTE_DATA)) {
+				     I2C_FUNC_SMBUS_BYTE_DATA)) {
 		dev_err(&client->dev, "i2c smbus byte data not supported\n");
 		return -EIO;
 	}
 
-	if (!pdata) {
-		pdata = bu21013_parse_dt(&client->dev);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
-	}
-
-	if (!gpio_is_valid(pdata->touch_pin)) {
-		dev_err(&client->dev, "invalid touch_pin supplied\n");
+	if (!client->irq) {
+		dev_err(&client->dev, "No IRQ set up\n");
 		return -EINVAL;
 	}
 
-	bu21013_data = kzalloc(sizeof(struct bu21013_ts_data), GFP_KERNEL);
-	in_dev = input_allocate_device();
-	if (!bu21013_data || !in_dev) {
+	ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
+	if (!ts)
+		return -ENOMEM;
+
+	ts->client = client;
+
+	ts->x_flip = device_property_read_bool(&client->dev, "rohm,flip-x");
+	ts->y_flip = device_property_read_bool(&client->dev, "rohm,flip-y");
+
+	in_dev = devm_input_allocate_device(&client->dev);
+	if (!in_dev) {
 		dev_err(&client->dev, "device memory alloc failed\n");
-		error = -ENOMEM;
-		goto err_free_mem;
+		return -ENOMEM;
 	}
+	ts->in_dev = in_dev;
+	input_set_drvdata(in_dev, ts);
 
-	bu21013_data->in_dev = in_dev;
-	bu21013_data->chip = pdata;
-	bu21013_data->client = client;
-	bu21013_data->irq = gpio_to_irq(pdata->touch_pin);
+	/* register the device to input subsystem */
+	in_dev->name = DRIVER_TP;
+	in_dev->id.bustype = BUS_I2C;
+
+	device_property_read_u32(&client->dev, "rohm,touch-max-x", &max_x);
+	device_property_read_u32(&client->dev, "rohm,touch-max-y", &max_y);
+
+	input_set_abs_params(in_dev, ABS_MT_POSITION_X, 0, max_x, 0, 0);
+	input_set_abs_params(in_dev, ABS_MT_POSITION_Y, 0, max_y, 0, 0);
+
+	touchscreen_parse_properties(in_dev, true, &ts->props);
+
+	/* Adjust for the legacy "flip" properties, if present */
+	if (!ts->props.invert_x &&
+	    device_property_read_bool(&client->dev, "rohm,flip-x")) {
+		info = &in_dev->absinfo[ABS_MT_POSITION_X];
+		info->maximum -= info->minimum;
+		info->minimum = 0;
+	}
 
-	bu21013_data->regulator = regulator_get(&client->dev, "avdd");
-	if (IS_ERR(bu21013_data->regulator)) {
+	if (!ts->props.invert_y &&
+	    device_property_read_bool(&client->dev, "rohm,flip-y")) {
+		info = &in_dev->absinfo[ABS_MT_POSITION_Y];
+		info->maximum -= info->minimum;
+		info->minimum = 0;
+	}
+
+	error = input_mt_init_slots(in_dev, MAX_FINGERS,
+				    INPUT_MT_DIRECT | INPUT_MT_TRACK |
+					INPUT_MT_DROP_UNUSED);
+	if (error) {
+		dev_err(&client->dev, "failed to initialize MT slots");
+		return error;
+	}
+
+	ts->regulator = devm_regulator_get(&client->dev, "avdd");
+	if (IS_ERR(ts->regulator)) {
 		dev_err(&client->dev, "regulator_get failed\n");
-		error = PTR_ERR(bu21013_data->regulator);
-		goto err_free_mem;
+		return PTR_ERR(ts->regulator);
 	}
 
-	error = regulator_enable(bu21013_data->regulator);
-	if (error < 0) {
+	error = regulator_enable(ts->regulator);
+	if (error) {
 		dev_err(&client->dev, "regulator enable failed\n");
-		goto err_put_regulator;
+		return error;
 	}
 
-	bu21013_data->touch_stopped = false;
-	init_waitqueue_head(&bu21013_data->wait);
+	error = devm_add_action_or_reset(&client->dev, bu21013_power_off, ts);
+	if (error) {
+		dev_err(&client->dev, "failed to install power off handler\n");
+		return error;
+	}
 
-	/* configure the gpio pins */
-	error = gpio_request_one(pdata->cs_pin, GPIOF_OUT_INIT_HIGH,
-				 "touchp_reset");
-	if (error < 0) {
-		dev_err(&client->dev, "Unable to request gpio reset_pin\n");
-		goto err_disable_regulator;
+	/* Named "CS" on the chip, DT binding is "reset" */
+	ts->cs_gpiod = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_HIGH);
+	error = PTR_ERR_OR_ZERO(ts->cs_gpiod);
+	if (error) {
+		if (error != -EPROBE_DEFER)
+			dev_err(&client->dev, "failed to get CS GPIO\n");
+		return error;
+	}
+	gpiod_set_consumer_name(ts->cs_gpiod, "BU21013 CS");
+
+	error = devm_add_action_or_reset(&client->dev,
+					 bu21013_disable_chip, ts);
+	if (error) {
+		dev_err(&client->dev,
+			"failed to install chip disable handler\n");
+		return error;
 	}
 
+	/* Named "INT" on the chip, DT binding is "touch" */
+	ts->int_gpiod = devm_gpiod_get_optional(&client->dev,
+						"touch", GPIOD_IN);
+	error = PTR_ERR_OR_ZERO(ts->int_gpiod);
+	if (error) {
+		if (error != -EPROBE_DEFER)
+			dev_err(&client->dev, "failed to get INT GPIO\n");
+		return error;
+	}
+
+	if (ts->int_gpiod)
+		gpiod_set_consumer_name(ts->int_gpiod, "BU21013 INT");
+
 	/* configure the touch panel controller */
-	error = bu21013_init_chip(bu21013_data);
+	error = bu21013_init_chip(ts);
 	if (error) {
 		dev_err(&client->dev, "error in bu21013 config\n");
-		goto err_cs_disable;
+		return error;
 	}
 
-	/* 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->touch_x_max, 0, 0);
-	input_set_abs_params(in_dev, ABS_MT_POSITION_Y, 0,
-						pdata->touch_y_max, 0, 0);
-	input_set_drvdata(in_dev, bu21013_data);
-
-	error = request_threaded_irq(bu21013_data->irq, NULL, bu21013_gpio_irq,
-				     IRQF_TRIGGER_FALLING | IRQF_SHARED |
-					IRQF_ONESHOT,
-				     DRIVER_TP, bu21013_data);
+	error = devm_request_threaded_irq(&client->dev, client->irq,
+					  NULL, bu21013_gpio_irq,
+					  IRQF_ONESHOT, DRIVER_TP, ts);
 	if (error) {
 		dev_err(&client->dev, "request irq %d failed\n",
-			bu21013_data->irq);
-		goto err_cs_disable;
+			client->irq);
+		return error;
 	}
 
 	error = input_register_device(in_dev);
 	if (error) {
 		dev_err(&client->dev, "failed to register input device\n");
-		goto err_free_irq;
+		return error;
 	}
 
-	device_init_wakeup(&client->dev, pdata->wakeup);
-	i2c_set_clientdata(client, bu21013_data);
+	i2c_set_clientdata(client, ts);
 
 	return 0;
-
-err_free_irq:
-	bu21013_free_irq(bu21013_data);
-err_cs_disable:
-	bu21013_cs_disable(bu21013_data);
-err_disable_regulator:
-	regulator_disable(bu21013_data->regulator);
-err_put_regulator:
-	regulator_put(bu21013_data->regulator);
-err_free_mem:
-	input_free_device(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 bu21013_remove(struct i2c_client *client)
 {
-	struct bu21013_ts_data *bu21013_data = i2c_get_clientdata(client);
+	struct bu21013_ts *ts = i2c_get_clientdata(client);
 
-	bu21013_free_irq(bu21013_data);
-
-	bu21013_cs_disable(bu21013_data);
-
-	input_unregister_device(bu21013_data->in_dev);
-
-	regulator_disable(bu21013_data->regulator);
-	regulator_put(bu21013_data->regulator);
-
-	kfree(bu21013_data);
+	/* Make sure IRQ will exit quickly even if there is contact */
+	ts->touch_stopped = true;
+	/* The resources will be freed by devm */
 
 	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)
+static int __maybe_unused bu21013_suspend(struct device *dev)
 {
-	struct bu21013_ts_data *bu21013_data = dev_get_drvdata(dev);
-	struct i2c_client *client = bu21013_data->client;
+	struct i2c_client *client = to_i2c_client(dev);
+	struct bu21013_ts *ts = i2c_get_clientdata(client);
 
-	bu21013_data->touch_stopped = true;
-	if (device_may_wakeup(&client->dev))
-		enable_irq_wake(bu21013_data->irq);
-	else
-		disable_irq(bu21013_data->irq);
+	ts->touch_stopped = true;
+	mb();
+	disable_irq(client->irq);
 
-	regulator_disable(bu21013_data->regulator);
+	if (!device_may_wakeup(&client->dev))
+		regulator_disable(ts->regulator);
 
 	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)
+static int __maybe_unused bu21013_resume(struct device *dev)
 {
-	struct bu21013_ts_data *bu21013_data = dev_get_drvdata(dev);
-	struct i2c_client *client = bu21013_data->client;
-	int retval;
+	struct i2c_client *client = to_i2c_client(dev);
+	struct bu21013_ts *ts = i2c_get_clientdata(client);
+	int error;
 
-	retval = regulator_enable(bu21013_data->regulator);
-	if (retval < 0) {
-		dev_err(&client->dev, "bu21013 regulator enable failed\n");
-		return retval;
-	}
+	if (!device_may_wakeup(&client->dev)) {
+		error = regulator_enable(ts->regulator);
+		if (error) {
+			dev_err(&client->dev,
+				"failed to re-enable regulator when resuming\n");
+			return error;
+		}
 
-	retval = bu21013_init_chip(bu21013_data);
-	if (retval < 0) {
-		dev_err(&client->dev, "bu21013 controller config failed\n");
-		return retval;
+		error = bu21013_init_chip(ts);
+		if (error) {
+			dev_err(&client->dev,
+				"failed to reinitialize chip when resuming\n");
+			return error;
+		}
 	}
 
-	bu21013_data->touch_stopped = false;
-
-	if (device_may_wakeup(&client->dev))
-		disable_irq_wake(bu21013_data->irq);
-	else
-		enable_irq(bu21013_data->irq);
+	ts->touch_stopped = false;
+	mb();
+	enable_irq(client->irq);
 
 	return 0;
 }
 
-static const struct dev_pm_ops bu21013_dev_pm_ops = {
-	.suspend = bu21013_suspend,
-	.resume  = bu21013_resume,
-};
-#endif
+static SIMPLE_DEV_PM_OPS(bu21013_dev_pm_ops, bu21013_suspend, bu21013_resume);
 
 static const struct i2c_device_id bu21013_id[] = {
 	{ DRIVER_TP, 0 },
@@ -714,9 +618,7 @@ MODULE_DEVICE_TABLE(i2c, bu21013_id);
 static struct i2c_driver bu21013_driver = {
 	.driver	= {
 		.name	=	DRIVER_TP,
-#ifdef CONFIG_PM
 		.pm	=	&bu21013_dev_pm_ops,
-#endif
 	},
 	.probe		=	bu21013_probe,
 	.remove		=	bu21013_remove,
diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index 3cc4341bbdff..5525f1fb1526 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -764,8 +764,6 @@ edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
 			      const char *debugfs_name)
 {
 	tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
-	if (!tsdata->debug_dir)
-		return;
 
 	debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
 	debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
diff --git a/drivers/input/touchscreen/fsl-imx25-tcq.c b/drivers/input/touchscreen/fsl-imx25-tcq.c
index 1d6c8f490b40..60a7246c5157 100644
--- a/drivers/input/touchscreen/fsl-imx25-tcq.c
+++ b/drivers/input/touchscreen/fsl-imx25-tcq.c
@@ -503,7 +503,6 @@ static int mx25_tcq_probe(struct platform_device *pdev)
 	struct input_dev *idev;
 	struct mx25_tcq_priv *priv;
 	struct mx25_tsadc *tsadc = dev_get_drvdata(dev->parent);
-	struct resource *res;
 	void __iomem *mem;
 	int error;
 
@@ -512,8 +511,7 @@ static int mx25_tcq_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	priv->dev = dev;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	mem = devm_ioremap_resource(dev, res);
+	mem = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(mem))
 		return PTR_ERR(mem);
 
@@ -528,10 +526,8 @@ static int mx25_tcq_probe(struct platform_device *pdev)
 	}
 
 	priv->irq = platform_get_irq(pdev, 0);
-	if (priv->irq <= 0) {
-		dev_err(dev, "Failed to get IRQ\n");
+	if (priv->irq <= 0)
 		return priv->irq;
-	}
 
 	idev = devm_input_allocate_device(dev);
 	if (!idev) {
diff --git a/drivers/input/touchscreen/hideep.c b/drivers/input/touchscreen/hideep.c
index 84fbbf415c43..ddad4a82a5e5 100644
--- a/drivers/input/touchscreen/hideep.c
+++ b/drivers/input/touchscreen/hideep.c
@@ -811,8 +811,7 @@ static int hideep_init_input(struct hideep_ts *ts)
 	if (error)
 		return error;
 
-	ts->key_num = device_property_read_u32_array(dev, "linux,keycodes",
-						     NULL, 0);
+	ts->key_num = device_property_count_u32(dev, "linux,keycodes");
 	if (ts->key_num > HIDEEP_KEY_MAX) {
 		dev_err(dev, "too many keys defined: %d\n",
 			ts->key_num);
diff --git a/drivers/input/touchscreen/imx6ul_tsc.c b/drivers/input/touchscreen/imx6ul_tsc.c
index e04eecd65bbb..9ed258854349 100644
--- a/drivers/input/touchscreen/imx6ul_tsc.c
+++ b/drivers/input/touchscreen/imx6ul_tsc.c
@@ -430,16 +430,12 @@ static int imx6ul_tsc_probe(struct platform_device *pdev)
 	}
 
 	tsc_irq = platform_get_irq(pdev, 0);
-	if (tsc_irq < 0) {
-		dev_err(&pdev->dev, "no tsc irq resource?\n");
+	if (tsc_irq < 0)
 		return tsc_irq;
-	}
 
 	adc_irq = platform_get_irq(pdev, 1);
-	if (adc_irq < 0) {
-		dev_err(&pdev->dev, "no adc irq resource?\n");
+	if (adc_irq < 0)
 		return adc_irq;
-	}
 
 	err = devm_request_threaded_irq(tsc->dev, tsc_irq,
 					NULL, tsc_irq_fn, IRQF_ONESHOT,
diff --git a/drivers/input/touchscreen/lpc32xx_ts.c b/drivers/input/touchscreen/lpc32xx_ts.c
index 567ed64b5392..b2cd9472e2d1 100644
--- a/drivers/input/touchscreen/lpc32xx_ts.c
+++ b/drivers/input/touchscreen/lpc32xx_ts.c
@@ -212,10 +212,8 @@ static int lpc32xx_ts_probe(struct platform_device *pdev)
 	}
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "Can't get interrupt resource\n");
+	if (irq < 0)
 		return irq;
-	}
 
 	tsc = kzalloc(sizeof(*tsc), GFP_KERNEL);
 	input = input_allocate_device();
diff --git a/drivers/input/touchscreen/mxs-lradc-ts.c b/drivers/input/touchscreen/mxs-lradc-ts.c
index 593b8d3e90b5..9e36fee38d61 100644
--- a/drivers/input/touchscreen/mxs-lradc-ts.c
+++ b/drivers/input/touchscreen/mxs-lradc-ts.c
@@ -606,7 +606,6 @@ static int mxs_lradc_ts_probe(struct platform_device *pdev)
 	struct device_node *node = dev->parent->of_node;
 	struct mxs_lradc *lradc = dev_get_drvdata(dev->parent);
 	struct mxs_lradc_ts *ts;
-	struct resource *iores;
 	int ret, irq, virq, i;
 	u32 ts_wires = 0, adapt;
 
@@ -620,12 +619,9 @@ static int mxs_lradc_ts_probe(struct platform_device *pdev)
 	ts->dev = dev;
 	spin_lock_init(&ts->lock);
 
-	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!iores)
-		return -EINVAL;
-	ts->base = devm_ioremap(dev, iores->start, resource_size(iores));
-	if (!ts->base)
-		return -ENOMEM;
+	ts->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(ts->base))
+		return PTR_ERR(ts->base);
 
 	ret = of_property_read_u32(node, "fsl,lradc-touchscreen-wires",
 				   &ts_wires);
diff --git a/drivers/input/touchscreen/sun4i-ts.c b/drivers/input/touchscreen/sun4i-ts.c
index f11ba7f2dca7..0af0fe8c40d7 100644
--- a/drivers/input/touchscreen/sun4i-ts.c
+++ b/drivers/input/touchscreen/sun4i-ts.c
@@ -300,8 +300,7 @@ static int sun4i_ts_probe(struct platform_device *pdev)
 		input_set_drvdata(ts->input, ts);
 	}
 
-	ts->base = devm_ioremap_resource(dev,
-			      platform_get_resource(pdev, IORESOURCE_MEM, 0));
+	ts->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(ts->base))
 		return PTR_ERR(ts->base);
 
diff --git a/drivers/input/touchscreen/ts4800-ts.c b/drivers/input/touchscreen/ts4800-ts.c
index fed73eeb47b3..5b4f5362c67b 100644
--- a/drivers/input/touchscreen/ts4800-ts.c
+++ b/drivers/input/touchscreen/ts4800-ts.c
@@ -148,7 +148,6 @@ static int ts4800_ts_probe(struct platform_device *pdev)
 {
 	struct input_polled_dev *poll_dev;
 	struct ts4800_ts *ts;
-	struct resource *res;
 	int error;
 
 	ts = devm_kzalloc(&pdev->dev, sizeof(*ts), GFP_KERNEL);
@@ -159,8 +158,7 @@ static int ts4800_ts_probe(struct platform_device *pdev)
 	if (error)
 		return error;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	ts->base = devm_ioremap_resource(&pdev->dev, res);
+	ts->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(ts->base))
 		return PTR_ERR(ts->base);
 
diff --git a/drivers/input/touchscreen/w90p910_ts.c b/drivers/input/touchscreen/w90p910_ts.c
deleted file mode 100644
index 7893d7fa398c..000000000000
--- a/drivers/input/touchscreen/w90p910_ts.c
+++ /dev/null
@@ -1,331 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2008 Nuvoton technology corporation.
- *
- * Wan ZongShun <mcuos.com@gmail.com>
- */
-
-#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/input.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-
-/* ADC controller bit defines */
-#define ADC_DELAY	0xf00
-#define ADC_DOWN	0x01
-#define ADC_TSC_Y	(0x01 << 8)
-#define ADC_TSC_X	(0x00 << 8)
-#define TSC_FOURWIRE	(~(0x03 << 1))
-#define ADC_CLK_EN	(0x01 << 28)	/* ADC clock enable */
-#define ADC_READ_CON	(0x01 << 12)
-#define ADC_CONV	(0x01 << 13)
-#define ADC_SEMIAUTO	(0x01 << 14)
-#define ADC_WAITTRIG	(0x03 << 14)
-#define ADC_RST1	(0x01 << 16)
-#define ADC_RST0	(0x00 << 16)
-#define ADC_EN		(0x01 << 17)
-#define ADC_INT		(0x01 << 18)
-#define WT_INT		(0x01 << 20)
-#define ADC_INT_EN	(0x01 << 21)
-#define LVD_INT_EN	(0x01 << 22)
-#define WT_INT_EN	(0x01 << 23)
-#define ADC_DIV		(0x04 << 1)	/* div = 6 */
-
-enum ts_state {
-	TS_WAIT_NEW_PACKET,	/* We are waiting next touch report */
-	TS_WAIT_X_COORD,	/* We are waiting for ADC to report X coord */
-	TS_WAIT_Y_COORD,	/* We are waiting for ADC to report Y coord */
-	TS_IDLE,		/* Input device is closed, don't do anything */
-};
-
-struct w90p910_ts {
-	struct input_dev *input;
-	struct timer_list timer;
-	struct clk *clk;
-	int irq_num;
-	void __iomem *ts_reg;
-	spinlock_t lock;
-	enum ts_state state;
-};
-
-static void w90p910_report_event(struct w90p910_ts *w90p910_ts, bool down)
-{
-	struct input_dev *dev = w90p910_ts->input;
-
-	if (down) {
-		input_report_abs(dev, ABS_X,
-				 __raw_readl(w90p910_ts->ts_reg + 0x0c));
-		input_report_abs(dev, ABS_Y,
-				 __raw_readl(w90p910_ts->ts_reg + 0x10));
-	}
-
-	input_report_key(dev, BTN_TOUCH, down);
-	input_sync(dev);
-}
-
-static void w90p910_prepare_x_reading(struct w90p910_ts *w90p910_ts)
-{
-	unsigned long ctlreg;
-
-	__raw_writel(ADC_TSC_X, w90p910_ts->ts_reg + 0x04);
-	ctlreg = __raw_readl(w90p910_ts->ts_reg);
-	ctlreg &= ~(ADC_WAITTRIG | WT_INT | WT_INT_EN);
-	ctlreg |= ADC_SEMIAUTO | ADC_INT_EN | ADC_CONV;
-	__raw_writel(ctlreg, w90p910_ts->ts_reg);
-
-	w90p910_ts->state = TS_WAIT_X_COORD;
-}
-
-static void w90p910_prepare_y_reading(struct w90p910_ts *w90p910_ts)
-{
-	unsigned long ctlreg;
-
-	__raw_writel(ADC_TSC_Y, w90p910_ts->ts_reg + 0x04);
-	ctlreg = __raw_readl(w90p910_ts->ts_reg);
-	ctlreg &= ~(ADC_WAITTRIG | ADC_INT | WT_INT_EN);
-	ctlreg |= ADC_SEMIAUTO | ADC_INT_EN | ADC_CONV;
-	__raw_writel(ctlreg, w90p910_ts->ts_reg);
-
-	w90p910_ts->state = TS_WAIT_Y_COORD;
-}
-
-static void w90p910_prepare_next_packet(struct w90p910_ts *w90p910_ts)
-{
-	unsigned long ctlreg;
-
-	ctlreg = __raw_readl(w90p910_ts->ts_reg);
-	ctlreg &= ~(ADC_INT | ADC_INT_EN | ADC_SEMIAUTO | ADC_CONV);
-	ctlreg |= ADC_WAITTRIG | WT_INT_EN;
-	__raw_writel(ctlreg, w90p910_ts->ts_reg);
-
-	w90p910_ts->state = TS_WAIT_NEW_PACKET;
-}
-
-static irqreturn_t w90p910_ts_interrupt(int irq, void *dev_id)
-{
-	struct w90p910_ts *w90p910_ts = dev_id;
-	unsigned long flags;
-
-	spin_lock_irqsave(&w90p910_ts->lock, flags);
-
-	switch (w90p910_ts->state) {
-	case TS_WAIT_NEW_PACKET:
-		/*
-		 * The controller only generates interrupts when pen
-		 * is down.
-		 */
-		del_timer(&w90p910_ts->timer);
-		w90p910_prepare_x_reading(w90p910_ts);
-		break;
-
-
-	case TS_WAIT_X_COORD:
-		w90p910_prepare_y_reading(w90p910_ts);
-		break;
-
-	case TS_WAIT_Y_COORD:
-		w90p910_report_event(w90p910_ts, true);
-		w90p910_prepare_next_packet(w90p910_ts);
-		mod_timer(&w90p910_ts->timer, jiffies + msecs_to_jiffies(100));
-		break;
-
-	case TS_IDLE:
-		break;
-	}
-
-	spin_unlock_irqrestore(&w90p910_ts->lock, flags);
-
-	return IRQ_HANDLED;
-}
-
-static void w90p910_check_pen_up(struct timer_list *t)
-{
-	struct w90p910_ts *w90p910_ts = from_timer(w90p910_ts, t, timer);
-	unsigned long flags;
-
-	spin_lock_irqsave(&w90p910_ts->lock, flags);
-
-	if (w90p910_ts->state == TS_WAIT_NEW_PACKET &&
-	    !(__raw_readl(w90p910_ts->ts_reg + 0x04) & ADC_DOWN)) {
-
-		w90p910_report_event(w90p910_ts, false);
-	}
-
-	spin_unlock_irqrestore(&w90p910_ts->lock, flags);
-}
-
-static int w90p910_open(struct input_dev *dev)
-{
-	struct w90p910_ts *w90p910_ts = input_get_drvdata(dev);
-	unsigned long val;
-
-	/* enable the ADC clock */
-	clk_enable(w90p910_ts->clk);
-
-	__raw_writel(ADC_RST1, w90p910_ts->ts_reg);
-	msleep(1);
-	__raw_writel(ADC_RST0, w90p910_ts->ts_reg);
-	msleep(1);
-
-	/* set delay and screen type */
-	val = __raw_readl(w90p910_ts->ts_reg + 0x04);
-	__raw_writel(val & TSC_FOURWIRE, w90p910_ts->ts_reg + 0x04);
-	__raw_writel(ADC_DELAY, w90p910_ts->ts_reg + 0x08);
-
-	w90p910_ts->state = TS_WAIT_NEW_PACKET;
-	wmb();
-
-	/* set trigger mode */
-	val = __raw_readl(w90p910_ts->ts_reg);
-	val |= ADC_WAITTRIG | ADC_DIV | ADC_EN | WT_INT_EN;
-	__raw_writel(val, w90p910_ts->ts_reg);
-
-	return 0;
-}
-
-static void w90p910_close(struct input_dev *dev)
-{
-	struct w90p910_ts *w90p910_ts = input_get_drvdata(dev);
-	unsigned long val;
-
-	/* disable trigger mode */
-
-	spin_lock_irq(&w90p910_ts->lock);
-
-	w90p910_ts->state = TS_IDLE;
-
-	val = __raw_readl(w90p910_ts->ts_reg);
-	val &= ~(ADC_WAITTRIG | ADC_DIV | ADC_EN | WT_INT_EN | ADC_INT_EN);
-	__raw_writel(val, w90p910_ts->ts_reg);
-
-	spin_unlock_irq(&w90p910_ts->lock);
-
-	/* Now that interrupts are shut off we can safely delete timer */
-	del_timer_sync(&w90p910_ts->timer);
-
-	/* stop the ADC clock */
-	clk_disable(w90p910_ts->clk);
-}
-
-static int w90x900ts_probe(struct platform_device *pdev)
-{
-	struct w90p910_ts *w90p910_ts;
-	struct input_dev *input_dev;
-	struct resource *res;
-	int err;
-
-	w90p910_ts = kzalloc(sizeof(struct w90p910_ts), GFP_KERNEL);
-	input_dev = input_allocate_device();
-	if (!w90p910_ts || !input_dev) {
-		err = -ENOMEM;
-		goto fail1;
-	}
-
-	w90p910_ts->input = input_dev;
-	w90p910_ts->state = TS_IDLE;
-	spin_lock_init(&w90p910_ts->lock);
-	timer_setup(&w90p910_ts->timer, w90p910_check_pen_up, 0);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		err = -ENXIO;
-		goto fail1;
-	}
-
-	if (!request_mem_region(res->start, resource_size(res),
-				pdev->name)) {
-		err = -EBUSY;
-		goto fail1;
-	}
-
-	w90p910_ts->ts_reg = ioremap(res->start, resource_size(res));
-	if (!w90p910_ts->ts_reg) {
-		err = -ENOMEM;
-		goto fail2;
-	}
-
-	w90p910_ts->clk = clk_get(&pdev->dev, NULL);
-	if (IS_ERR(w90p910_ts->clk)) {
-		err = PTR_ERR(w90p910_ts->clk);
-		goto fail3;
-	}
-
-	input_dev->name = "W90P910 TouchScreen";
-	input_dev->phys = "w90p910ts/event0";
-	input_dev->id.bustype = BUS_HOST;
-	input_dev->id.vendor  = 0x0005;
-	input_dev->id.product = 0x0001;
-	input_dev->id.version = 0x0100;
-	input_dev->dev.parent = &pdev->dev;
-	input_dev->open = w90p910_open;
-	input_dev->close = w90p910_close;
-
-	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, 0, 0x400, 0, 0);
-	input_set_abs_params(input_dev, ABS_Y, 0, 0x400, 0, 0);
-
-	input_set_drvdata(input_dev, w90p910_ts);
-
-	w90p910_ts->irq_num = platform_get_irq(pdev, 0);
-	if (request_irq(w90p910_ts->irq_num, w90p910_ts_interrupt,
-			0, "w90p910ts", w90p910_ts)) {
-		err = -EBUSY;
-		goto fail4;
-	}
-
-	err = input_register_device(w90p910_ts->input);
-	if (err)
-		goto fail5;
-
-	platform_set_drvdata(pdev, w90p910_ts);
-
-	return 0;
-
-fail5:	free_irq(w90p910_ts->irq_num, w90p910_ts);
-fail4:	clk_put(w90p910_ts->clk);
-fail3:	iounmap(w90p910_ts->ts_reg);
-fail2:	release_mem_region(res->start, resource_size(res));
-fail1:	input_free_device(input_dev);
-	kfree(w90p910_ts);
-	return err;
-}
-
-static int w90x900ts_remove(struct platform_device *pdev)
-{
-	struct w90p910_ts *w90p910_ts = platform_get_drvdata(pdev);
-	struct resource *res;
-
-	free_irq(w90p910_ts->irq_num, w90p910_ts);
-	del_timer_sync(&w90p910_ts->timer);
-	iounmap(w90p910_ts->ts_reg);
-
-	clk_put(w90p910_ts->clk);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(res->start, resource_size(res));
-
-	input_unregister_device(w90p910_ts->input);
-	kfree(w90p910_ts);
-
-	return 0;
-}
-
-static struct platform_driver w90x900ts_driver = {
-	.probe		= w90x900ts_probe,
-	.remove		= w90x900ts_remove,
-	.driver		= {
-		.name	= "nuc900-ts",
-	},
-};
-module_platform_driver(w90x900ts_driver);
-
-MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
-MODULE_DESCRIPTION("w90p910 touch screen driver!");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:nuc900-ts");
diff --git a/drivers/input/touchscreen/wacom_w8001.c b/drivers/input/touchscreen/wacom_w8001.c
index 3715d1eace92..691285ace228 100644
--- a/drivers/input/touchscreen/wacom_w8001.c
+++ b/drivers/input/touchscreen/wacom_w8001.c
@@ -27,6 +27,8 @@ MODULE_AUTHOR("Jaya Kumar <jayakumar.lkml@gmail.com>");
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 
+#define W8001_MAX_PHYS		42
+
 #define W8001_MAX_LENGTH	13
 #define W8001_LEAD_MASK		0x80
 #define W8001_LEAD_BYTE		0x80
@@ -89,7 +91,7 @@ struct w8001 {
 	unsigned char response_type;
 	unsigned char response[W8001_MAX_LENGTH];
 	unsigned char data[W8001_MAX_LENGTH];
-	char phys[32];
+	char phys[W8001_MAX_PHYS];
 	int type;
 	unsigned int pktlen;
 	u16 max_touch_x;
diff --git a/drivers/platform/x86/surfacepro3_button.c b/drivers/platform/x86/surfacepro3_button.c
index 47c6d000465a..ec515223f654 100644
--- a/drivers/platform/x86/surfacepro3_button.c
+++ b/drivers/platform/x86/surfacepro3_button.c
@@ -20,6 +20,12 @@
 #define SURFACE_BUTTON_OBJ_NAME		"VGBI"
 #define SURFACE_BUTTON_DEVICE_NAME	"Surface Pro 3/4 Buttons"
 
+#define MSHW0040_DSM_REVISION		0x01
+#define MSHW0040_DSM_GET_OMPR		0x02	// get OEM Platform Revision
+static const guid_t MSHW0040_DSM_UUID =
+	GUID_INIT(0x6fd05c69, 0xcde3, 0x49f4, 0x95, 0xed, 0xab, 0x16, 0x65,
+		  0x49, 0x80, 0x35);
+
 #define SURFACE_BUTTON_NOTIFY_TABLET_MODE	0xc8
 
 #define SURFACE_BUTTON_NOTIFY_PRESS_POWER	0xc6
@@ -142,6 +148,44 @@ static int surface_button_resume(struct device *dev)
 }
 #endif
 
+/*
+ * Surface Pro 4 and Surface Book 2 / Surface Pro 2017 use the same device
+ * ID (MSHW0040) for the power/volume buttons. Make sure this is the right
+ * device by checking for the _DSM method and OEM Platform Revision.
+ *
+ * Returns true if the driver should bind to this device, i.e. the device is
+ * either MSWH0028 (Pro 3) or MSHW0040 on a Pro 4 or Book 1.
+ */
+static bool surface_button_check_MSHW0040(struct acpi_device *dev)
+{
+	acpi_handle handle = dev->handle;
+	union acpi_object *result;
+	u64 oem_platform_rev = 0;	// valid revisions are nonzero
+
+	// get OEM platform revision
+	result = acpi_evaluate_dsm_typed(handle, &MSHW0040_DSM_UUID,
+					 MSHW0040_DSM_REVISION,
+					 MSHW0040_DSM_GET_OMPR,
+					 NULL, ACPI_TYPE_INTEGER);
+
+	/*
+	 * If evaluating the _DSM fails, the method is not present. This means
+	 * that we have either MSHW0028 or MSHW0040 on Pro 4 or Book 1, so we
+	 * should use this driver. We use revision 0 indicating it is
+	 * unavailable.
+	 */
+
+	if (result) {
+		oem_platform_rev = result->integer.value;
+		ACPI_FREE(result);
+	}
+
+	dev_dbg(&dev->dev, "OEM Platform Revision %llu\n", oem_platform_rev);
+
+	return oem_platform_rev == 0;
+}
+
+
 static int surface_button_add(struct acpi_device *device)
 {
 	struct surface_button *button;
@@ -154,6 +198,9 @@ static int surface_button_add(struct acpi_device *device)
 	    strlen(SURFACE_BUTTON_OBJ_NAME)))
 		return -ENODEV;
 
+	if (!surface_button_check_MSHW0040(device))
+		return -ENODEV;
+
 	button = kzalloc(sizeof(struct surface_button), GFP_KERNEL);
 	if (!button)
 		return -ENOMEM;