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

Pull input updates from Dmitry Torokhov:
 "Mostly existing driver fixes plus a new driver for game controllers
  directly connected to Nintendo 64, and an enhancement for keyboards
  driven by Chrome OS EC to communicate layout of the top row to
  userspace"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (47 commits)
  Input: st1232 - fix NORMAL vs. IDLE state handling
  Input: aiptek - convert sysfs sprintf/snprintf family to sysfs_emit
  Input: alps - fix spelling of "positive"
  ARM: dts: cros-ec-keyboard: Use keymap macros
  dt-bindings: input: Fix the keymap for LOCK key
  dt-bindings: input: Create macros for cros-ec keymap
  Input: cros-ec-keyb - expose function row physical map to userspace
  dt-bindings: input: cros-ec-keyb: Add a new property describing top row
  Input: applespi - fix occasional crc errors under load.
  Input: applespi - don't wait for responses to commands indefinitely.
  Input: st1232 - add IDLE state as ready condition
  Input: zinitix - fix return type of zinitix_init_touch()
  Input: i8042 - add ASUS Zenbook Flip to noselftest list
  Input: add missing dependencies on CONFIG_HAS_IOMEM
  Input: joydev - prevent potential read overflow in ioctl
  Input: elo - fix an error code in elo_connect()
  Input: xpad - add support for PowerA Enhanced Wired Controller for Xbox Series X|S
  Input: sur40 - fix an error code in sur40_probe()
  Input: elants_i2c - detect enum overflow
  Input: zinitix - remove unneeded semicolon
  ...

28 files changed, 1126 insertions, 517 deletions

diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c
index a2b5fbba2d3b..430dc6975004 100644
--- a/drivers/input/joydev.c
+++ b/drivers/input/joydev.c
@@ -456,7 +456,7 @@ static int joydev_handle_JSIOCSAXMAP(struct joydev *joydev,
 	if (IS_ERR(abspam))
 		return PTR_ERR(abspam);
 
-	for (i = 0; i < joydev->nabs; i++) {
+	for (i = 0; i < len && i < joydev->nabs; i++) {
 		if (abspam[i] > ABS_MAX) {
 			retval = -EINVAL;
 			goto out;
@@ -480,6 +480,9 @@ static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev,
 	int i;
 	int retval = 0;
 
+	if (len % sizeof(*keypam))
+		return -EINVAL;
+
 	len = min(len, sizeof(joydev->keypam));
 
 	/* Validate the map. */
@@ -487,7 +490,7 @@ static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev,
 	if (IS_ERR(keypam))
 		return PTR_ERR(keypam);
 
-	for (i = 0; i < joydev->nkey; i++) {
+	for (i = 0; i < (len / 2) && i < joydev->nkey; i++) {
 		if (keypam[i] > KEY_MAX || keypam[i] < BTN_MISC) {
 			retval = -EINVAL;
 			goto out;
diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig
index b080f0cfb068..5e38899058c1 100644
--- a/drivers/input/joystick/Kconfig
+++ b/drivers/input/joystick/Kconfig
@@ -382,4 +382,11 @@ config JOYSTICK_FSIA6B
 	  To compile this driver as a module, choose M here: the
 	  module will be called fsia6b.
 
+config JOYSTICK_N64
+	bool "N64 controller"
+	depends on MACH_NINTENDO64
+	help
+	  Say Y here if you want enable support for the four
+	  built-in controller ports on the Nintendo 64 console.
+
 endif
diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile
index 58232b3057d3..31d720c9e493 100644
--- a/drivers/input/joystick/Makefile
+++ b/drivers/input/joystick/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_JOYSTICK_INTERACT)		+= interact.o
 obj-$(CONFIG_JOYSTICK_JOYDUMP)		+= joydump.o
 obj-$(CONFIG_JOYSTICK_MAGELLAN)		+= magellan.o
 obj-$(CONFIG_JOYSTICK_MAPLE)		+= maplecontrol.o
+obj-$(CONFIG_JOYSTICK_N64)		+= n64joy.o
 obj-$(CONFIG_JOYSTICK_PSXPAD_SPI)	+= psxpad-spi.o
 obj-$(CONFIG_JOYSTICK_PXRC)		+= pxrc.o
 obj-$(CONFIG_JOYSTICK_SIDEWINDER)	+= sidewinder.o
@@ -37,4 +38,3 @@ obj-$(CONFIG_JOYSTICK_WARRIOR)		+= warrior.o
 obj-$(CONFIG_JOYSTICK_WALKERA0701)	+= walkera0701.o
 obj-$(CONFIG_JOYSTICK_XPAD)		+= xpad.o
 obj-$(CONFIG_JOYSTICK_ZHENHUA)		+= zhenhua.o
-
diff --git a/drivers/input/joystick/n64joy.c b/drivers/input/joystick/n64joy.c
new file mode 100644
index 000000000000..8bcc529942bc
--- /dev/null
+++ b/drivers/input/joystick/n64joy.c
@@ -0,0 +1,345 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Support for the four N64 controllers.
+ *
+ * Copyright (c) 2021 Lauri Kasanen
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/limits.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+
+MODULE_AUTHOR("Lauri Kasanen <cand@gmx.com>");
+MODULE_DESCRIPTION("Driver for N64 controllers");
+MODULE_LICENSE("GPL");
+
+#define PIF_RAM 0x1fc007c0
+
+#define SI_DRAM_REG 0
+#define SI_READ_REG 1
+#define SI_WRITE_REG 4
+#define SI_STATUS_REG 6
+
+#define SI_STATUS_DMA_BUSY  BIT(0)
+#define SI_STATUS_IO_BUSY   BIT(1)
+
+#define N64_CONTROLLER_ID 0x0500
+
+#define MAX_CONTROLLERS 4
+
+static const char *n64joy_phys[MAX_CONTROLLERS] = {
+	"n64joy/port0",
+	"n64joy/port1",
+	"n64joy/port2",
+	"n64joy/port3",
+};
+
+struct n64joy_priv {
+	u64 si_buf[8] ____cacheline_aligned;
+	struct timer_list timer;
+	struct mutex n64joy_mutex;
+	struct input_dev *n64joy_dev[MAX_CONTROLLERS];
+	u32 __iomem *reg_base;
+	u8 n64joy_opened;
+};
+
+struct joydata {
+	unsigned int: 16; /* unused */
+	unsigned int err: 2;
+	unsigned int: 14; /* unused */
+
+	union {
+		u32 data;
+
+		struct {
+			unsigned int a: 1;
+			unsigned int b: 1;
+			unsigned int z: 1;
+			unsigned int start: 1;
+			unsigned int up: 1;
+			unsigned int down: 1;
+			unsigned int left: 1;
+			unsigned int right: 1;
+			unsigned int: 2; /* unused */
+			unsigned int l: 1;
+			unsigned int r: 1;
+			unsigned int c_up: 1;
+			unsigned int c_down: 1;
+			unsigned int c_left: 1;
+			unsigned int c_right: 1;
+			signed int x: 8;
+			signed int y: 8;
+		};
+	};
+};
+
+static void n64joy_write_reg(u32 __iomem *reg_base, const u8 reg, const u32 value)
+{
+	writel(value, reg_base + reg);
+}
+
+static u32 n64joy_read_reg(u32 __iomem *reg_base, const u8 reg)
+{
+	return readl(reg_base + reg);
+}
+
+static void n64joy_wait_si_dma(u32 __iomem *reg_base)
+{
+	while (n64joy_read_reg(reg_base, SI_STATUS_REG) &
+	       (SI_STATUS_DMA_BUSY | SI_STATUS_IO_BUSY))
+		cpu_relax();
+}
+
+static void n64joy_exec_pif(struct n64joy_priv *priv, const u64 in[8])
+{
+	unsigned long flags;
+
+	dma_cache_wback_inv((unsigned long) in, 8 * 8);
+	dma_cache_inv((unsigned long) priv->si_buf, 8 * 8);
+
+	local_irq_save(flags);
+
+	n64joy_wait_si_dma(priv->reg_base);
+
+	barrier();
+	n64joy_write_reg(priv->reg_base, SI_DRAM_REG, virt_to_phys(in));
+	barrier();
+	n64joy_write_reg(priv->reg_base, SI_WRITE_REG, PIF_RAM);
+	barrier();
+
+	n64joy_wait_si_dma(priv->reg_base);
+
+	barrier();
+	n64joy_write_reg(priv->reg_base, SI_DRAM_REG, virt_to_phys(priv->si_buf));
+	barrier();
+	n64joy_write_reg(priv->reg_base, SI_READ_REG, PIF_RAM);
+	barrier();
+
+	n64joy_wait_si_dma(priv->reg_base);
+
+	local_irq_restore(flags);
+}
+
+static const u64 polldata[] ____cacheline_aligned = {
+	0xff010401ffffffff,
+	0xff010401ffffffff,
+	0xff010401ffffffff,
+	0xff010401ffffffff,
+	0xfe00000000000000,
+	0,
+	0,
+	1
+};
+
+static void n64joy_poll(struct timer_list *t)
+{
+	const struct joydata *data;
+	struct n64joy_priv *priv = container_of(t, struct n64joy_priv, timer);
+	struct input_dev *dev;
+	u32 i;
+
+	n64joy_exec_pif(priv, polldata);
+
+	data = (struct joydata *) priv->si_buf;
+
+	for (i = 0; i < MAX_CONTROLLERS; i++) {
+		if (!priv->n64joy_dev[i])
+			continue;
+
+		dev = priv->n64joy_dev[i];
+
+		/* d-pad */
+		input_report_key(dev, BTN_DPAD_UP, data[i].up);
+		input_report_key(dev, BTN_DPAD_DOWN, data[i].down);
+		input_report_key(dev, BTN_DPAD_LEFT, data[i].left);
+		input_report_key(dev, BTN_DPAD_RIGHT, data[i].right);
+
+		/* c buttons */
+		input_report_key(dev, BTN_FORWARD, data[i].c_up);
+		input_report_key(dev, BTN_BACK, data[i].c_down);
+		input_report_key(dev, BTN_LEFT, data[i].c_left);
+		input_report_key(dev, BTN_RIGHT, data[i].c_right);
+
+		/* matching buttons */
+		input_report_key(dev, BTN_START, data[i].start);
+		input_report_key(dev, BTN_Z, data[i].z);
+
+		/* remaining ones: a, b, l, r */
+		input_report_key(dev, BTN_0, data[i].a);
+		input_report_key(dev, BTN_1, data[i].b);
+		input_report_key(dev, BTN_2, data[i].l);
+		input_report_key(dev, BTN_3, data[i].r);
+
+		input_report_abs(dev, ABS_X, data[i].x);
+		input_report_abs(dev, ABS_Y, data[i].y);
+
+		input_sync(dev);
+	}
+
+	mod_timer(&priv->timer, jiffies + msecs_to_jiffies(16));
+}
+
+static int n64joy_open(struct input_dev *dev)
+{
+	struct n64joy_priv *priv = input_get_drvdata(dev);
+	int err;
+
+	err = mutex_lock_interruptible(&priv->n64joy_mutex);
+	if (err)
+		return err;
+
+	if (!priv->n64joy_opened) {
+		/*
+		 * We could use the vblank irq, but it's not important if
+		 * the poll point slightly changes.
+		 */
+		timer_setup(&priv->timer, n64joy_poll, 0);
+		mod_timer(&priv->timer, jiffies + msecs_to_jiffies(16));
+	}
+
+	priv->n64joy_opened++;
+
+	mutex_unlock(&priv->n64joy_mutex);
+	return err;
+}
+
+static void n64joy_close(struct input_dev *dev)
+{
+	struct n64joy_priv *priv = input_get_drvdata(dev);
+
+	mutex_lock(&priv->n64joy_mutex);
+	if (!--priv->n64joy_opened)
+		del_timer_sync(&priv->timer);
+	mutex_unlock(&priv->n64joy_mutex);
+}
+
+static const u64 __initconst scandata[] ____cacheline_aligned = {
+	0xff010300ffffffff,
+	0xff010300ffffffff,
+	0xff010300ffffffff,
+	0xff010300ffffffff,
+	0xfe00000000000000,
+	0,
+	0,
+	1
+};
+
+/*
+ * The target device is embedded and RAM-constrained. We save RAM
+ * by initializing in __init code that gets dropped late in boot.
+ * For the same reason there is no module or unloading support.
+ */
+static int __init n64joy_probe(struct platform_device *pdev)
+{
+	const struct joydata *data;
+	struct n64joy_priv *priv;
+	struct input_dev *dev;
+	int err = 0;
+	u32 i, j, found = 0;
+
+	priv = kzalloc(sizeof(struct n64joy_priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+	mutex_init(&priv->n64joy_mutex);
+
+	priv->reg_base = devm_platform_ioremap_resource(pdev, 0);
+	if (!priv->reg_base) {
+		err = -EINVAL;
+		goto fail;
+	}
+
+	/* The controllers are not hotpluggable, so we can scan in init */
+	n64joy_exec_pif(priv, scandata);
+
+	data = (struct joydata *) priv->si_buf;
+
+	for (i = 0; i < MAX_CONTROLLERS; i++) {
+		if (!data[i].err && data[i].data >> 16 == N64_CONTROLLER_ID) {
+			found++;
+
+			dev = priv->n64joy_dev[i] = input_allocate_device();
+			if (!priv->n64joy_dev[i]) {
+				err = -ENOMEM;
+				goto fail;
+			}
+
+			input_set_drvdata(dev, priv);
+
+			dev->name = "N64 controller";
+			dev->phys = n64joy_phys[i];
+			dev->id.bustype = BUS_HOST;
+			dev->id.vendor = 0;
+			dev->id.product = data[i].data >> 16;
+			dev->id.version = 0;
+			dev->dev.parent = &pdev->dev;
+
+			dev->open = n64joy_open;
+			dev->close = n64joy_close;
+
+			/* d-pad */
+			input_set_capability(dev, EV_KEY, BTN_DPAD_UP);
+			input_set_capability(dev, EV_KEY, BTN_DPAD_DOWN);
+			input_set_capability(dev, EV_KEY, BTN_DPAD_LEFT);
+			input_set_capability(dev, EV_KEY, BTN_DPAD_RIGHT);
+			/* c buttons */
+			input_set_capability(dev, EV_KEY, BTN_LEFT);
+			input_set_capability(dev, EV_KEY, BTN_RIGHT);
+			input_set_capability(dev, EV_KEY, BTN_FORWARD);
+			input_set_capability(dev, EV_KEY, BTN_BACK);
+			/* matching buttons */
+			input_set_capability(dev, EV_KEY, BTN_START);
+			input_set_capability(dev, EV_KEY, BTN_Z);
+			/* remaining ones: a, b, l, r */
+			input_set_capability(dev, EV_KEY, BTN_0);
+			input_set_capability(dev, EV_KEY, BTN_1);
+			input_set_capability(dev, EV_KEY, BTN_2);
+			input_set_capability(dev, EV_KEY, BTN_3);
+
+			for (j = 0; j < 2; j++)
+				input_set_abs_params(dev, ABS_X + j,
+						     S8_MIN, S8_MAX, 0, 0);
+
+			err = input_register_device(dev);
+			if (err) {
+				input_free_device(dev);
+				goto fail;
+			}
+		}
+	}
+
+	pr_info("%u controller(s) connected\n", found);
+
+	if (!found)
+		return -ENODEV;
+
+	return 0;
+fail:
+	for (i = 0; i < MAX_CONTROLLERS; i++) {
+		if (!priv->n64joy_dev[i])
+			continue;
+		input_unregister_device(priv->n64joy_dev[i]);
+	}
+	return err;
+}
+
+static struct platform_driver n64joy_driver = {
+	.driver = {
+		.name = "n64joy",
+	},
+};
+
+static int __init n64joy_init(void)
+{
+	return platform_driver_probe(&n64joy_driver, n64joy_probe);
+}
+
+module_init(n64joy_init);
diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index 8cc8ca4a9ac0..9f0d07dcbf06 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -305,6 +305,7 @@ static const struct xpad_device {
 	{ 0x1bad, 0xfd00, "Razer Onza TE", 0, XTYPE_XBOX360 },
 	{ 0x1bad, 0xfd01, "Razer Onza", 0, XTYPE_XBOX360 },
 	{ 0x20d6, 0x2001, "BDA Xbox Series X Wired Controller", 0, XTYPE_XBOXONE },
+	{ 0x20d6, 0x2009, "PowerA Enhanced Wired Controller for Xbox Series X|S", 0, XTYPE_XBOXONE },
 	{ 0x20d6, 0x281f, "PowerA Wired Controller For Xbox 360", 0, XTYPE_XBOX360 },
 	{ 0x2e24, 0x0652, "Hyperkin Duke X-Box One pad", 0, XTYPE_XBOXONE },
 	{ 0x24c6, 0x5000, "Razer Atrox Arcade Stick", MAP_TRIGGERS_TO_BUTTONS, XTYPE_XBOX360 },
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index 2b321c17054a..32d15809ae58 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -446,7 +446,7 @@ config KEYBOARD_MPR121
 
 config KEYBOARD_SNVS_PWRKEY
 	tristate "IMX SNVS Power Key Driver"
-	depends on ARCH_MXC || COMPILE_TEST
+	depends on ARCH_MXC || (COMPILE_TEST && HAS_IOMEM)
 	depends on OF
 	help
 	  This is the snvs powerkey driver for the Freescale i.MX application
@@ -685,7 +685,7 @@ config KEYBOARD_OMAP
 
 config KEYBOARD_OMAP4
 	tristate "TI OMAP4+ keypad support"
-	depends on OF || ARCH_OMAP2PLUS
+	depends on (OF && HAS_IOMEM) || ARCH_OMAP2PLUS
 	select INPUT_MATRIXKMAP
 	help
 	  Say Y here if you want to use the OMAP4+ keypad.
@@ -773,7 +773,7 @@ config KEYBOARD_CAP11XX
 
 config KEYBOARD_BCM
 	tristate "Broadcom keypad driver"
-	depends on OF && HAVE_CLK
+	depends on OF && HAVE_CLK && HAS_IOMEM
 	select INPUT_MATRIXKMAP
 	default ARCH_BCM_CYGNUS
 	help
diff --git a/drivers/input/keyboard/applespi.c b/drivers/input/keyboard/applespi.c
index d22223154177..eda1b23002b5 100644
--- a/drivers/input/keyboard/applespi.c
+++ b/drivers/input/keyboard/applespi.c
@@ -48,6 +48,7 @@
 #include <linux/efi.h>
 #include <linux/input.h>
 #include <linux/input/mt.h>
+#include <linux/ktime.h>
 #include <linux/leds.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
@@ -409,7 +410,7 @@ struct applespi_data {
 	unsigned int			cmd_msg_cntr;
 	/* lock to protect the above parameters and flags below */
 	spinlock_t			cmd_msg_lock;
-	bool				cmd_msg_queued;
+	ktime_t				cmd_msg_queued;
 	enum applespi_evt_type		cmd_evt_type;
 
 	struct led_classdev		backlight_info;
@@ -729,7 +730,7 @@ static void applespi_msg_complete(struct applespi_data *applespi,
 		wake_up_all(&applespi->drain_complete);
 
 	if (is_write_msg) {
-		applespi->cmd_msg_queued = false;
+		applespi->cmd_msg_queued = 0;
 		applespi_send_cmd_msg(applespi);
 	}
 
@@ -748,6 +749,8 @@ static void applespi_async_write_complete(void *context)
 					 applespi->tx_status,
 					 APPLESPI_STATUS_SIZE);
 
+	udelay(SPI_RW_CHG_DELAY_US);
+
 	if (!applespi_check_write_status(applespi, applespi->wr_m.status)) {
 		/*
 		 * If we got an error, we presumably won't get the expected
@@ -771,8 +774,16 @@ static int applespi_send_cmd_msg(struct applespi_data *applespi)
 		return 0;
 
 	/* check whether send is in progress */
-	if (applespi->cmd_msg_queued)
-		return 0;
+	if (applespi->cmd_msg_queued) {
+		if (ktime_ms_delta(ktime_get(), applespi->cmd_msg_queued) < 1000)
+			return 0;
+
+		dev_warn(&applespi->spi->dev, "Command %d timed out\n",
+			 applespi->cmd_evt_type);
+
+		applespi->cmd_msg_queued = 0;
+		applespi->write_active = false;
+	}
 
 	/* set up packet */
 	memset(packet, 0, APPLESPI_PACKET_SIZE);
@@ -869,7 +880,7 @@ static int applespi_send_cmd_msg(struct applespi_data *applespi)
 		return sts;
 	}
 
-	applespi->cmd_msg_queued = true;
+	applespi->cmd_msg_queued = ktime_get_coarse();
 	applespi->write_active = true;
 
 	return 0;
@@ -1921,7 +1932,7 @@ static int __maybe_unused applespi_resume(struct device *dev)
 	applespi->drain = false;
 	applespi->have_cl_led_on = false;
 	applespi->have_bl_level = 0;
-	applespi->cmd_msg_queued = false;
+	applespi->cmd_msg_queued = 0;
 	applespi->read_active = false;
 	applespi->write_active = false;
 
diff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c
index b379ed762878..38457d9641bd 100644
--- a/drivers/input/keyboard/cros_ec_keyb.c
+++ b/drivers/input/keyboard/cros_ec_keyb.c
@@ -27,6 +27,8 @@
 
 #include <asm/unaligned.h>
 
+#define MAX_NUM_TOP_ROW_KEYS   15
+
 /**
  * struct cros_ec_keyb - Structure representing EC keyboard device
  *
@@ -42,6 +44,9 @@
  * @idev: The input device for the matrix keys.
  * @bs_idev: The input device for non-matrix buttons and switches (or NULL).
  * @notifier: interrupt event notifier for transport devices
+ * @function_row_physmap: An array of the encoded rows/columns for the top
+ *                        row function keys, in an order from left to right
+ * @num_function_row_keys: The number of top row keys in a custom keyboard
  */
 struct cros_ec_keyb {
 	unsigned int rows;
@@ -58,6 +63,9 @@ struct cros_ec_keyb {
 	struct input_dev *idev;
 	struct input_dev *bs_idev;
 	struct notifier_block notifier;
+
+	u16 function_row_physmap[MAX_NUM_TOP_ROW_KEYS];
+	size_t num_function_row_keys;
 };
 
 /**
@@ -527,6 +535,11 @@ static int cros_ec_keyb_register_matrix(struct cros_ec_keyb *ckdev)
 	struct input_dev *idev;
 	const char *phys;
 	int err;
+	struct property *prop;
+	const __be32 *p;
+	u16 *physmap;
+	u32 key_pos;
+	int row, col;
 
 	err = matrix_keypad_parse_properties(dev, &ckdev->rows, &ckdev->cols);
 	if (err)
@@ -578,6 +591,21 @@ static int cros_ec_keyb_register_matrix(struct cros_ec_keyb *ckdev)
 	ckdev->idev = idev;
 	cros_ec_keyb_compute_valid_keys(ckdev);
 
+	physmap = ckdev->function_row_physmap;
+	of_property_for_each_u32(dev->of_node, "function-row-physmap",
+				 prop, p, key_pos) {
+		if (ckdev->num_function_row_keys == MAX_NUM_TOP_ROW_KEYS) {
+			dev_warn(dev, "Only support up to %d top row keys\n",
+				 MAX_NUM_TOP_ROW_KEYS);
+			break;
+		}
+		row = KEY_ROW(key_pos);
+		col = KEY_COL(key_pos);
+		*physmap = MATRIX_SCAN_CODE(row, col, ckdev->row_shift);
+		physmap++;
+		ckdev->num_function_row_keys++;
+	}
+
 	err = input_register_device(ckdev->idev);
 	if (err) {
 		dev_err(dev, "cannot register input device\n");
@@ -587,6 +615,51 @@ static int cros_ec_keyb_register_matrix(struct cros_ec_keyb *ckdev)
 	return 0;
 }
 
+static ssize_t function_row_physmap_show(struct device *dev,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	ssize_t size = 0;
+	int i;
+	struct cros_ec_keyb *ckdev = dev_get_drvdata(dev);
+	u16 *physmap = ckdev->function_row_physmap;
+
+	for (i = 0; i < ckdev->num_function_row_keys; i++)
+		size += scnprintf(buf + size, PAGE_SIZE - size,
+				  "%s%02X", size ? " " : "", physmap[i]);
+	if (size)
+		size += scnprintf(buf + size, PAGE_SIZE - size, "\n");
+
+	return size;
+}
+
+static DEVICE_ATTR_RO(function_row_physmap);
+
+static struct attribute *cros_ec_keyb_attrs[] = {
+	&dev_attr_function_row_physmap.attr,
+	NULL,
+};
+
+static umode_t cros_ec_keyb_attr_is_visible(struct kobject *kobj,
+					    struct attribute *attr,
+					    int n)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct cros_ec_keyb *ckdev = dev_get_drvdata(dev);
+
+	if (attr == &dev_attr_function_row_physmap.attr &&
+	    !ckdev->num_function_row_keys)
+		return 0;
+
+	return attr->mode;
+}
+
+static const struct attribute_group cros_ec_keyb_attr_group = {
+	.is_visible = cros_ec_keyb_attr_is_visible,
+	.attrs = cros_ec_keyb_attrs,
+};
+
+
 static int cros_ec_keyb_probe(struct platform_device *pdev)
 {
 	struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
@@ -617,6 +690,12 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
 		return err;
 	}
 
+	err = devm_device_add_group(dev, &cros_ec_keyb_attr_group);
+	if (err) {
+		dev_err(dev, "failed to create attributes. err=%d\n", err);
+		return err;
+	}
+
 	ckdev->notifier.notifier_call = cros_ec_keyb_work;
 	err = blocking_notifier_chain_register(&ckdev->ec->event_notifier,
 					       &ckdev->notifier);
diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c
index b17ac2a295b9..43375b38ee59 100644
--- a/drivers/input/keyboard/omap4-keypad.c
+++ b/drivers/input/keyboard/omap4-keypad.c
@@ -60,6 +60,8 @@
 	((((dbms) * 1000) / ((1 << ((ptv) + 1)) * (1000000 / 32768))) - 1)
 #define OMAP4_VAL_DEBOUNCINGTIME_16MS					\
 	OMAP4_KEYPAD_DEBOUNCINGTIME_MS(16, OMAP4_KEYPAD_PTV_DIV_128)
+#define OMAP4_KEYPAD_AUTOIDLE_MS	50	/* Approximate measured time */
+#define OMAP4_KEYPAD_IDLE_CHECK_MS	(OMAP4_KEYPAD_AUTOIDLE_MS / 2)
 
 enum {
 	KBD_REVISION_OMAP4 = 0,
@@ -71,6 +73,7 @@ struct omap4_keypad {
 
 	void __iomem *base;
 	unsigned int irq;
+	struct mutex lock;		/* for key scan */
 
 	unsigned int rows;
 	unsigned int cols;
@@ -78,7 +81,7 @@ struct omap4_keypad {
 	u32 irqreg_offset;
 	unsigned int row_shift;
 	bool no_autorepeat;
-	unsigned char key_state[8];
+	u64 keys;
 	unsigned short *keymap;
 };
 
@@ -107,6 +110,55 @@ static void kbd_write_irqreg(struct omap4_keypad *keypad_data,
 		     keypad_data->base + keypad_data->irqreg_offset + offset);
 }
 
+static int omap4_keypad_report_keys(struct omap4_keypad *keypad_data,
+				    u64 keys, bool down)
+{
+	struct input_dev *input_dev = keypad_data->input;
+	unsigned int col, row, code;
+	DECLARE_BITMAP(mask, 64);
+	unsigned long bit;
+	int events = 0;
+
+	bitmap_from_u64(mask, keys);
+
+	for_each_set_bit(bit, mask, keypad_data->rows * BITS_PER_BYTE) {
+		row = bit / BITS_PER_BYTE;
+		col = bit % BITS_PER_BYTE;
+		code = MATRIX_SCAN_CODE(row, col, keypad_data->row_shift);
+
+		input_event(input_dev, EV_MSC, MSC_SCAN, code);
+		input_report_key(input_dev, keypad_data->keymap[code], down);
+
+		events++;
+	}
+
+	if (events)
+		input_sync(input_dev);
+
+	return events;
+}
+
+static void omap4_keypad_scan_keys(struct omap4_keypad *keypad_data, u64 keys)
+{
+	u64 changed;
+
+	mutex_lock(&keypad_data->lock);
+
+	changed = keys ^ keypad_data->keys;
+
+	/*
+	 * Report key up events separately and first. This matters in case we
+	 * lost key-up interrupt and just now catching up.
+	 */
+	omap4_keypad_report_keys(keypad_data, changed & ~keys, false);
+
+	/* Report key down events */
+	omap4_keypad_report_keys(keypad_data, changed & keys, true);
+
+	keypad_data->keys = keys;
+
+	mutex_unlock(&keypad_data->lock);
+}
 
 /* Interrupt handlers */
 static irqreturn_t omap4_keypad_irq_handler(int irq, void *dev_id)
@@ -122,48 +174,44 @@ static irqreturn_t omap4_keypad_irq_handler(int irq, void *dev_id)
 static irqreturn_t omap4_keypad_irq_thread_fn(int irq, void *dev_id)
 {
 	struct omap4_keypad *keypad_data = dev_id;
-	struct input_dev *input_dev = keypad_data->input;
-	unsigned char key_state[ARRAY_SIZE(keypad_data->key_state)];
-	unsigned int col, row, code, changed;
-	u32 *new_state = (u32 *) key_state;
-
-	*new_state = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE31_0);
-	*(new_state + 1) = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE63_32);
-
-	for (row = 0; row < keypad_data->rows; row++) {
-		changed = key_state[row] ^ keypad_data->key_state[row];
-		if (!changed)
-			continue;
-
-		for (col = 0; col < keypad_data->cols; col++) {
-			if (changed & (1 << col)) {
-				code = MATRIX_SCAN_CODE(row, col,
-						keypad_data->row_shift);
-				input_event(input_dev, EV_MSC, MSC_SCAN, code);
-				input_report_key(input_dev,
-						 keypad_data->keymap[code],
-						 key_state[row] & (1 << col));
-			}
-		}
+	struct device *dev = keypad_data->input->dev.parent;
+	u32 low, high;
+	int error;
+	u64 keys;
+
+	error = pm_runtime_get_sync(dev);
+	if (error < 0) {
+		pm_runtime_put_noidle(dev);
+		return IRQ_NONE;
 	}
 
-	input_sync(input_dev);
+	low = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE31_0);
+	high = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE63_32);
+	keys = low | (u64)high << 32;
 
-	memcpy(keypad_data->key_state, key_state,
-		sizeof(keypad_data->key_state));
+	omap4_keypad_scan_keys(keypad_data, keys);
 
 	/* clear pending interrupts */
 	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
 			 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
 
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+
 	return IRQ_HANDLED;
 }
 
 static int omap4_keypad_open(struct input_dev *input)
 {
 	struct omap4_keypad *keypad_data = input_get_drvdata(input);
+	struct device *dev = input->dev.parent;
+	int error;
 
-	pm_runtime_get_sync(input->dev.parent);
+	error = pm_runtime_get_sync(dev);
+	if (error < 0) {
+		pm_runtime_put_noidle(dev);
+		return error;
+	}
 
 	disable_irq(keypad_data->irq);
 
@@ -176,13 +224,15 @@ static int omap4_keypad_open(struct input_dev *input)
 	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
 			 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
 	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
-			OMAP4_DEF_IRQENABLE_EVENTEN |
-				OMAP4_DEF_IRQENABLE_LONGKEY);
+			OMAP4_DEF_IRQENABLE_EVENTEN);
 	kbd_writel(keypad_data, OMAP4_KBD_WAKEUPENABLE,
-			OMAP4_DEF_WUP_EVENT_ENA | OMAP4_DEF_WUP_LONG_KEY_ENA);
+			OMAP4_DEF_WUP_EVENT_ENA);
 
 	enable_irq(keypad_data->irq);
 
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+
 	return 0;
 }
 
@@ -200,14 +250,20 @@ static void omap4_keypad_stop(struct omap4_keypad *keypad_data)
 
 static void omap4_keypad_close(struct input_dev *input)
 {
-	struct omap4_keypad *keypad_data;
+	struct omap4_keypad *keypad_data = input_get_drvdata(input);
+	struct device *dev = input->dev.parent;
+	int error;
+
+	error = pm_runtime_get_sync(dev);
+	if (error < 0)
+		pm_runtime_put_noidle(dev);
 
-	keypad_data = input_get_drvdata(input);
 	disable_irq(keypad_data->irq);
 	omap4_keypad_stop(keypad_data);
 	enable_irq(keypad_data->irq);
 
-	pm_runtime_put_sync(input->dev.parent);
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
 }
 
 static int omap4_keypad_parse_dt(struct device *dev,
@@ -252,8 +308,41 @@ static int omap4_keypad_check_revision(struct device *dev,
 	return 0;
 }
 
+/*
+ * Errata ID i689 "1.32 Keyboard Key Up Event Can Be Missed".
+ * Interrupt may not happen for key-up events. We must clear stuck
+ * key-up events after the keyboard hardware has auto-idled.
+ */
+static int __maybe_unused omap4_keypad_runtime_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
+	u32 active;
+
+	active = kbd_readl(keypad_data, OMAP4_KBD_STATEMACHINE);
+	if (active) {
+		pm_runtime_mark_last_busy(dev);
+		return -EBUSY;
+	}
+
+	omap4_keypad_scan_keys(keypad_data, 0);
+
+	return 0;
+}
+
+static const struct dev_pm_ops omap4_keypad_pm_ops = {
+	SET_RUNTIME_PM_OPS(omap4_keypad_runtime_suspend, NULL, NULL)
+};
+
+static void omap4_disable_pm(void *d)
+{
+	pm_runtime_dont_use_autosuspend(d);
+	pm_runtime_disable(d);
+}
+
 static int omap4_keypad_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct omap4_keypad *keypad_data;
 	struct input_dev *input_dev;
 	struct resource *res;
@@ -271,63 +360,62 @@ static int omap4_keypad_probe(struct platform_device *pdev)
 	if (irq < 0)
 		return irq;
 
-	keypad_data = kzalloc(sizeof(struct omap4_keypad), GFP_KERNEL);
+	keypad_data = devm_kzalloc(dev, sizeof(*keypad_data), GFP_KERNEL);
 	if (!keypad_data) {
-		dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
+		dev_err(dev, "keypad_data memory allocation failed\n");
 		return -ENOMEM;
 	}
 
 	keypad_data->irq = irq;
+	mutex_init(&keypad_data->lock);
+	platform_set_drvdata(pdev, keypad_data);
 
-	error = omap4_keypad_parse_dt(&pdev->dev, keypad_data);
+	error = omap4_keypad_parse_dt(dev, keypad_data);
 	if (error)
-		goto err_free_keypad;
+		return error;
 
-	res = request_mem_region(res->start, resource_size(res), pdev->name);
-	if (!res) {
-		dev_err(&pdev->dev, "can't request mem region\n");
-		error = -EBUSY;
-		goto err_free_keypad;
-	}
+	keypad_data->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(keypad_data->base))
+		return PTR_ERR(keypad_data->base);
 
-	keypad_data->base = ioremap(res->start, resource_size(res));
-	if (!keypad_data->base) {
-		dev_err(&pdev->dev, "can't ioremap mem resource\n");
-		error = -ENOMEM;
-		goto err_release_mem;
-	}
+	pm_runtime_use_autosuspend(dev);
+	pm_runtime_set_autosuspend_delay(dev, OMAP4_KEYPAD_IDLE_CHECK_MS);
+	pm_runtime_enable(dev);
 
-	pm_runtime_enable(&pdev->dev);
+	error = devm_add_action_or_reset(dev, omap4_disable_pm, dev);
+	if (error) {
+		dev_err(dev, "unable to register cleanup action\n");
+		return error;
+	}
 
 	/*
 	 * Enable clocks for the keypad module so that we can read
 	 * revision register.
 	 */
-	error = pm_runtime_get_sync(&pdev->dev);
+	error = pm_runtime_get_sync(dev);
 	if (error) {
-		dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
-		pm_runtime_put_noidle(&pdev->dev);
-	} else {
-		error = omap4_keypad_check_revision(&pdev->dev,
-						    keypad_data);
-		if (!error) {
-			/* Ensure device does not raise interrupts */
-			omap4_keypad_stop(keypad_data);
-		}
-		pm_runtime_put_sync(&pdev->dev);
+		dev_err(dev, "pm_runtime_get_sync() failed\n");
+		pm_runtime_put_noidle(dev);
+		return error;
+	}
+
+	error = omap4_keypad_check_revision(dev, keypad_data);
+	if (!error) {
+		/* Ensure device does not raise interrupts */
+		omap4_keypad_stop(keypad_data);
 	}
+
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
 	if (error)
-		goto err_pm_disable;
+		return error;
 
 	/* input device allocation */
-	keypad_data->input = input_dev = input_allocate_device();
-	if (!input_dev) {
-		error = -ENOMEM;
-		goto err_pm_disable;
-	}
+	keypad_data->input = input_dev = devm_input_allocate_device(dev);
+	if (!input_dev)
+		return -ENOMEM;
 
 	input_dev->name = pdev->name;
-	input_dev->dev.parent = &pdev->dev;
 	input_dev->id.bustype = BUS_HOST;
 	input_dev->id.vendor = 0x0001;
 	input_dev->id.product = 0x0001;
@@ -344,84 +432,51 @@ static int omap4_keypad_probe(struct platform_device *pdev)
 
 	keypad_data->row_shift = get_count_order(keypad_data->cols);
 	max_keys = keypad_data->rows << keypad_data->row_shift;
-	keypad_data->keymap = kcalloc(max_keys,
-				      sizeof(keypad_data->keymap[0]),
-				      GFP_KERNEL);
+	keypad_data->keymap = devm_kcalloc(dev,
+					   max_keys,
+					   sizeof(keypad_data->keymap[0]),
+					   GFP_KERNEL);
 	if (!keypad_data->keymap) {
-		dev_err(&pdev->dev, "Not enough memory for keymap\n");
-		error = -ENOMEM;
-		goto err_free_input;
+		dev_err(dev, "Not enough memory for keymap\n");
+		return -ENOMEM;
 	}
 
 	error = matrix_keypad_build_keymap(NULL, NULL,
 					   keypad_data->rows, keypad_data->cols,
 					   keypad_data->keymap, input_dev);
 	if (error) {
-		dev_err(&pdev->dev, "failed to build keymap\n");
-		goto err_free_keymap;
+		dev_err(dev, "failed to build keymap\n");
+		return error;
 	}
 
-	error = request_threaded_irq(keypad_data->irq, omap4_keypad_irq_handler,
-				     omap4_keypad_irq_thread_fn, IRQF_ONESHOT,
-				     "omap4-keypad", keypad_data);
+	error = devm_request_threaded_irq(dev, keypad_data->irq,
+					  omap4_keypad_irq_handler,
+					  omap4_keypad_irq_thread_fn,
+					  IRQF_ONESHOT,
+					  "omap4-keypad", keypad_data);
 	if (error) {
-		dev_err(&pdev->dev, "failed to register interrupt\n");
-		goto err_free_keymap;
+		dev_err(dev, "failed to register interrupt\n");
+		return error;
 	}
 
 	error = input_register_device(keypad_data->input);
-	if (error < 0) {
-		dev_err(&pdev->dev, "failed to register input device\n");
-		goto err_free_irq;
+	if (error) {
+		dev_err(dev, "failed to register input device\n");
+		return error;
 	}
 
-	device_init_wakeup(&pdev->dev, true);
-	error = dev_pm_set_wake_irq(&pdev->dev, keypad_data->irq);
+	device_init_wakeup(dev, true);
+	error = dev_pm_set_wake_irq(dev, keypad_data->irq);
 	if (error)
-		dev_warn(&pdev->dev,
-			 "failed to set up wakeup irq: %d\n", error);
-
-	platform_set_drvdata(pdev, keypad_data);
+		dev_warn(dev, "failed to set up wakeup irq: %d\n", error);
 
 	return 0;
-
-err_free_irq:
-	free_irq(keypad_data->irq, keypad_data);
-err_free_keymap:
-	kfree(keypad_data->keymap);
-err_free_input:
-	input_free_device(input_dev);
-err_pm_disable:
-	pm_runtime_disable(&pdev->dev);
-	iounmap(keypad_data->base);
-err_release_mem:
-	release_mem_region(res->start, resource_size(res));
-err_free_keypad:
-	kfree(keypad_data);
-	return error;
 }
 
 static int omap4_keypad_remove(struct platform_device *pdev)
 {
-	struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
-	struct resource *res;
-
 	dev_pm_clear_wake_irq(&pdev->dev);
 
-	free_irq(keypad_data->irq, keypad_data);
-
-	pm_runtime_disable(&pdev->dev);
-
-	input_unregister_device(keypad_data->input);
-
-	iounmap(keypad_data->base);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(res->start, resource_size(res));
-
-	kfree(keypad_data->keymap);
-	kfree(keypad_data);
-
 	return 0;
 }
 
@@ -437,6 +492,7 @@ static struct platform_driver omap4_keypad_driver = {
 	.driver		= {
 		.name	= "omap4-keypad",
 		.of_match_table = omap_keypad_dt_match,
+		.pm = &omap4_keypad_pm_ops,
 	},
 };
 module_platform_driver(omap4_keypad_driver);
diff --git a/drivers/input/misc/da7280.c b/drivers/input/misc/da7280.c
index 37568b00873d..b08610d6e575 100644
--- a/drivers/input/misc/da7280.c
+++ b/drivers/input/misc/da7280.c
@@ -863,6 +863,7 @@ static void da7280_parse_properties(struct device *dev,
 		gpi_str3[7] = '0' + i;
 		haptics->gpi_ctl[i].polarity = 0;
 		error = device_property_read_string(dev, gpi_str3, &str);
+		if (!error)
 			haptics->gpi_ctl[i].polarity =
 				da7280_haptic_of_gpi_pol_str(dev, str);
 	}
@@ -1299,11 +1300,13 @@ static int __maybe_unused da7280_resume(struct device *dev)
 	return retval;
 }
 
+#ifdef CONFIG_OF
 static const struct of_device_id da7280_of_match[] = {
 	{ .compatible = "dlg,da7280", },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, da7280_of_match);
+#endif
 
 static const struct i2c_device_id da7280_i2c_id[] = {
 	{ "da7280", },
diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index b067bfd2699c..4a6b33bbe7ea 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -986,7 +986,7 @@ static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
 	case V7_PACKET_ID_TWO:
 		mt[1].x &= ~0x000F;
 		mt[1].y |= 0x000F;
-		/* Detect false-postive touches where x & y report max value */
+		/* Detect false-positive touches where x & y report max value */
 		if (mt[1].y == 0x7ff && mt[1].x == 0xff0) {
 			mt[1].x = 0;
 			/* y gets set to 0 at the end of this function */
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 8fb7b4385ded..ffad142801b3 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -1106,8 +1106,11 @@ static void synaptics_process_packet(struct psmouse *psmouse)
 					num_fingers = hw.w + 2;
 				break;
 			case 2:
-				if (SYN_MODEL_PEN(info->model_id))
-					;   /* Nothing, treat a pen as a single finger */
+				/*
+				 * SYN_MODEL_PEN(info->model_id): even if
+				 * the device supports pen, we treat it as
+				 * a single finger.
+				 */
 				break;
 			case 4 ... 15:
 				if (SYN_CAP_PALMDETECT(info->capabilities))
diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig
index 0754744b9ce5..f39b7b3f7942 100644
--- a/drivers/input/serio/Kconfig
+++ b/drivers/input/serio/Kconfig
@@ -255,7 +255,7 @@ config SERIO_ARC_PS2
 
 config SERIO_APBPS2
 	tristate "GRLIB APBPS2 PS/2 keyboard/mouse controller"
-	depends on OF
+	depends on OF && HAS_IOMEM
 	help
 	  Say Y here if you want support for GRLIB APBPS2 peripherals used
 	  to connect to PS/2 keyboard and/or mouse.
diff --git a/drivers/input/serio/i8042-x86ia64io.h b/drivers/input/serio/i8042-x86ia64io.h
index c74b020796a9..9119e12a5778 100644
--- a/drivers/input/serio/i8042-x86ia64io.h
+++ b/drivers/input/serio/i8042-x86ia64io.h
@@ -588,6 +588,10 @@ static const struct dmi_system_id i8042_dmi_noselftest_table[] = {
 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 			DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /* Notebook */
 		},
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+			DMI_MATCH(DMI_CHASSIS_TYPE, "31"), /* Convertible Notebook */
+		},
 	},
 	{ }
 };
diff --git a/drivers/input/tablet/aiptek.c b/drivers/input/tablet/aiptek.c
index e08b0ef078e8..fcb1b646436a 100644
--- a/drivers/input/tablet/aiptek.c
+++ b/drivers/input/tablet/aiptek.c
@@ -1036,9 +1036,9 @@ static ssize_t show_tabletSize(struct device *dev, struct device_attribute *attr
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%dx%d\n",
-			input_abs_get_max(aiptek->inputdev, ABS_X) + 1,
-			input_abs_get_max(aiptek->inputdev, ABS_Y) + 1);
+	return sysfs_emit(buf, "%dx%d\n",
+			  input_abs_get_max(aiptek->inputdev, ABS_X) + 1,
+			  input_abs_get_max(aiptek->inputdev, ABS_Y) + 1);
 }
 
 /* These structs define the sysfs files, param #1 is the name of the
@@ -1064,9 +1064,8 @@ static ssize_t show_tabletPointerMode(struct device *dev, struct device_attribut
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			map_val_to_str(pointer_mode_map,
-					aiptek->curSetting.pointerMode));
+	return sysfs_emit(buf, "%s\n", map_val_to_str(pointer_mode_map,
+						      aiptek->curSetting.pointerMode));
 }
 
 static ssize_t
@@ -1101,9 +1100,8 @@ static ssize_t show_tabletCoordinateMode(struct device *dev, struct device_attri
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			map_val_to_str(coordinate_mode_map,
-					aiptek->curSetting.coordinateMode));
+	return sysfs_emit(buf, "%s\n", map_val_to_str(coordinate_mode_map,
+						      aiptek->curSetting.coordinateMode));
 }
 
 static ssize_t
@@ -1143,9 +1141,8 @@ static ssize_t show_tabletToolMode(struct device *dev, struct device_attribute *
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			map_val_to_str(tool_mode_map,
-					aiptek->curSetting.toolMode));
+	return sysfs_emit(buf, "%s\n", map_val_to_str(tool_mode_map,
+						      aiptek->curSetting.toolMode));
 }
 
 static ssize_t
@@ -1174,10 +1171,9 @@ static ssize_t show_tabletXtilt(struct device *dev, struct device_attribute *att
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
 	if (aiptek->curSetting.xTilt == AIPTEK_TILT_DISABLE) {
-		return snprintf(buf, PAGE_SIZE, "disable\n");
+		return sysfs_emit(buf, "disable\n");
 	} else {
-		return snprintf(buf, PAGE_SIZE, "%d\n",
-				aiptek->curSetting.xTilt);
+		return sysfs_emit(buf, "%d\n", aiptek->curSetting.xTilt);
 	}
 }
 
@@ -1216,10 +1212,9 @@ static ssize_t show_tabletYtilt(struct device *dev, struct device_attribute *att
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
 	if (aiptek->curSetting.yTilt == AIPTEK_TILT_DISABLE) {
-		return snprintf(buf, PAGE_SIZE, "disable\n");
+		return sysfs_emit(buf, "disable\n");
 	} else {
-		return snprintf(buf, PAGE_SIZE, "%d\n",
-				aiptek->curSetting.yTilt);
+		return sysfs_emit(buf, "%d\n", aiptek->curSetting.yTilt);
 	}
 }
 
@@ -1257,7 +1252,7 @@ static ssize_t show_tabletJitterDelay(struct device *dev, struct device_attribut
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", aiptek->curSetting.jitterDelay);
+	return sysfs_emit(buf, "%d\n", aiptek->curSetting.jitterDelay);
 }
 
 static ssize_t
@@ -1286,8 +1281,7 @@ static ssize_t show_tabletProgrammableDelay(struct device *dev, struct device_at
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n",
-			aiptek->curSetting.programmableDelay);
+	return sysfs_emit(buf, "%d\n", aiptek->curSetting.programmableDelay);
 }
 
 static ssize_t
@@ -1316,7 +1310,7 @@ static ssize_t show_tabletEventsReceived(struct device *dev, struct device_attri
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%ld\n", aiptek->eventCount);
+	return sysfs_emit(buf, "%ld\n", aiptek->eventCount);
 }
 
 static DEVICE_ATTR(event_count, S_IRUGO, show_tabletEventsReceived, NULL);
@@ -1355,7 +1349,7 @@ static ssize_t show_tabletDiagnosticMessage(struct device *dev, struct device_at
 	default:
 		return 0;
 	}
-	return snprintf(buf, PAGE_SIZE, retMsg);
+	return sysfs_emit(buf, retMsg);
 }
 
 static DEVICE_ATTR(diagnostic, S_IRUGO, show_tabletDiagnosticMessage, NULL);
@@ -1375,9 +1369,8 @@ static ssize_t show_tabletStylusUpper(struct device *dev, struct device_attribut
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			map_val_to_str(stylus_button_map,
-					aiptek->curSetting.stylusButtonUpper));
+	return sysfs_emit(buf, "%s\n", map_val_to_str(stylus_button_map,
+						      aiptek->curSetting.stylusButtonUpper));
 }
 
 static ssize_t
@@ -1406,9 +1399,8 @@ static ssize_t show_tabletStylusLower(struct device *dev, struct device_attribut
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			map_val_to_str(stylus_button_map,
-					aiptek->curSetting.stylusButtonLower));
+	return sysfs_emit(buf, "%s\n", map_val_to_str(stylus_button_map,
+						      aiptek->curSetting.stylusButtonLower));
 }
 
 static ssize_t
@@ -1444,9 +1436,8 @@ static ssize_t show_tabletMouseLeft(struct device *dev, struct device_attribute
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			map_val_to_str(mouse_button_map,
-					aiptek->curSetting.mouseButtonLeft));
+	return sysfs_emit(buf, "%s\n", map_val_to_str(mouse_button_map,
+						      aiptek->curSetting.mouseButtonLeft));
 }
 
 static ssize_t
@@ -1474,9 +1465,8 @@ static ssize_t show_tabletMouseMiddle(struct device *dev, struct device_attribut
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			map_val_to_str(mouse_button_map,
-					aiptek->curSetting.mouseButtonMiddle));
+	return sysfs_emit(buf, "%s\n", map_val_to_str(mouse_button_map,
+						      aiptek->curSetting.mouseButtonMiddle));
 }
 
 static ssize_t
@@ -1504,9 +1494,8 @@ static ssize_t show_tabletMouseRight(struct device *dev, struct device_attribute
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			map_val_to_str(mouse_button_map,
-					aiptek->curSetting.mouseButtonRight));
+	return sysfs_emit(buf, "%s\n", map_val_to_str(mouse_button_map,
+						      aiptek->curSetting.mouseButtonRight));
 }
 
 static ssize_t
@@ -1535,10 +1524,9 @@ static ssize_t show_tabletWheel(struct device *dev, struct device_attribute *att
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
 	if (aiptek->curSetting.wheel == AIPTEK_WHEEL_DISABLE) {
-		return snprintf(buf, PAGE_SIZE, "disable\n");
+		return sysfs_emit(buf, "disable\n");
 	} else {
-		return snprintf(buf, PAGE_SIZE, "%d\n",
-				aiptek->curSetting.wheel);
+		return sysfs_emit(buf, "%d\n", aiptek->curSetting.wheel);
 	}
 }
 
@@ -1568,8 +1556,7 @@ static ssize_t show_tabletExecute(struct device *dev, struct device_attribute *a
 	/* There is nothing useful to display, so a one-line manual
 	 * is in order...
 	 */
-	return snprintf(buf, PAGE_SIZE,
-			"Write anything to this file to program your tablet.\n");
+	return sysfs_emit(buf, "Write anything to this file to program your tablet.\n");
 }
 
 static ssize_t
@@ -1600,7 +1587,7 @@ static ssize_t show_tabletODMCode(struct device *dev, struct device_attribute *a
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "0x%04x\n", aiptek->features.odmCode);
+	return sysfs_emit(buf, "0x%04x\n", aiptek->features.odmCode);
 }
 
 static DEVICE_ATTR(odm_code, S_IRUGO, show_tabletODMCode, NULL);
@@ -1613,7 +1600,7 @@ static ssize_t show_tabletModelCode(struct device *dev, struct device_attribute
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "0x%04x\n", aiptek->features.modelCode);
+	return sysfs_emit(buf, "0x%04x\n", aiptek->features.modelCode);
 }
 
 static DEVICE_ATTR(model_code, S_IRUGO, show_tabletModelCode, NULL);
@@ -1626,8 +1613,7 @@ static ssize_t show_firmwareCode(struct device *dev, struct device_attribute *at
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%04x\n",
-			aiptek->features.firmwareCode);
+	return sysfs_emit(buf, "%04x\n", aiptek->features.firmwareCode);
 }
 
 static DEVICE_ATTR(firmware_code, S_IRUGO, show_firmwareCode, NULL);
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index cc18f54ea887..529614d364fe 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -608,7 +608,7 @@ config TOUCHSCREEN_MTOUCH
 
 config TOUCHSCREEN_IMX6UL_TSC
 	tristate "Freescale i.MX6UL touchscreen controller"
-	depends on (OF && GPIOLIB) || COMPILE_TEST
+	depends on ((OF && GPIOLIB) || COMPILE_TEST) && HAS_IOMEM
 	help
 	  Say Y here if you have a Freescale i.MX6UL, and want to
 	  use the internal touchscreen controller.
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index a703870ca7bd..f113a27aeb1e 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -64,24 +64,13 @@
 
 struct ads7846_buf {
 	u8 cmd;
-	/*
-	 * This union is a temporary hack. The driver does an in-place
-	 * endianness conversion. This will be cleaned up in the next
-	 * patch.
-	 */
-	union {
-		__be16 data_be16;
-		u16 data;
-	};
+	__be16 data;
 } __packed;
 
-
-struct ts_event {
-	bool ignore;
-	struct ads7846_buf x;
-	struct ads7846_buf y;
-	struct ads7846_buf z1;
-	struct ads7846_buf z2;
+struct ads7846_buf_layout {
+	unsigned int offset;
+	unsigned int count;
+	unsigned int skip;
 };
 
 /*
@@ -90,12 +79,18 @@ struct ts_event {
  * systems where main memory is not DMA-coherent (most non-x86 boards).
  */
 struct ads7846_packet {
-	struct ts_event tc;
-	struct ads7846_buf read_x_cmd;
-	struct ads7846_buf read_y_cmd;
-	struct ads7846_buf read_z1_cmd;
-	struct ads7846_buf read_z2_cmd;
+	unsigned int count;
+	unsigned int count_skip;
+	unsigned int cmds;
+	unsigned int last_cmd_idx;
+	struct ads7846_buf_layout l[5];
+	struct ads7846_buf *rx;
+	struct ads7846_buf *tx;
+
 	struct ads7846_buf pwrdown_cmd;
+
+	bool ignore;
+	u16 x, y, z1, z2;
 };
 
 struct ads7846 {
@@ -194,7 +189,6 @@ struct ads7846 {
 #define	READ_Y(vref)	(READ_12BIT_DFR(y,  1, vref))
 #define	READ_Z1(vref)	(READ_12BIT_DFR(z1, 1, vref))
 #define	READ_Z2(vref)	(READ_12BIT_DFR(z2, 1, vref))
-
 #define	READ_X(vref)	(READ_12BIT_DFR(x,  1, vref))
 #define	PWRDOWN		(READ_12BIT_DFR(y,  0, 0))	/* LAST */
 
@@ -207,6 +201,21 @@ struct ads7846 {
 #define	REF_ON	(READ_12BIT_DFR(x, 1, 1))
 #define	REF_OFF	(READ_12BIT_DFR(y, 0, 0))
 
+/* Order commands in the most optimal way to reduce Vref switching and
+ * settling time:
+ * Measure:  X; Vref: X+, X-; IN: Y+
+ * Measure:  Y; Vref: Y+, Y-; IN: X+
+ * Measure: Z1; Vref: Y+, X-; IN: X+
+ * Measure: Z2; Vref: Y+, X-; IN: Y-
+ */
+enum ads7846_cmds {
+	ADS7846_X,
+	ADS7846_Y,
+	ADS7846_Z1,
+	ADS7846_Z2,
+	ADS7846_PWDOWN,
+};
+
 static int get_pendown_state(struct ads7846 *ts)
 {
 	if (ts->get_pendown_state)
@@ -689,26 +698,109 @@ static int ads7846_no_filter(void *ads, int data_idx, int *val)
 	return ADS7846_FILTER_OK;
 }
 
-static int ads7846_get_value(struct ads7846 *ts, struct spi_message *m)
+static int ads7846_get_value(struct ads7846_buf *buf)
 {
 	int value;
-	struct spi_transfer *t =
-		list_entry(m->transfers.prev, struct spi_transfer, transfer_list);
-	struct ads7846_buf *buf = t->rx_buf;
 
-	value = be16_to_cpup(&buf->data_be16);
+	value = be16_to_cpup(&buf->data);
 
 	/* enforce ADC output is 12 bits width */
 	return (value >> 3) & 0xfff;
 }
 
-static void ads7846_update_value(struct spi_message *m, int val)
+static void ads7846_set_cmd_val(struct ads7846 *ts, enum ads7846_cmds cmd_idx,
+				u16 val)
+{
+	struct ads7846_packet *packet = ts->packet;
+
+	switch (cmd_idx) {
+	case ADS7846_Y:
+		packet->y = val;
+		break;
+	case ADS7846_X:
+		packet->x = val;
+		break;
+	case ADS7846_Z1:
+		packet->z1 = val;
+		break;
+	case ADS7846_Z2:
+		packet->z2 = val;
+		break;
+	default:
+		WARN_ON_ONCE(1);
+	}
+}
+
+static u8 ads7846_get_cmd(enum ads7846_cmds cmd_idx, int vref)
+{
+	switch (cmd_idx) {
+	case ADS7846_Y:
+		return READ_Y(vref);
+	case ADS7846_X:
+		return READ_X(vref);
+
+	/* 7846 specific commands  */
+	case ADS7846_Z1:
+		return READ_Z1(vref);
+	case ADS7846_Z2:
+		return READ_Z2(vref);
+	case ADS7846_PWDOWN:
+		return PWRDOWN;
+	default:
+		WARN_ON_ONCE(1);
+	}
+
+	return 0;
+}
+
+static bool ads7846_cmd_need_settle(enum ads7846_cmds cmd_idx)
+{
+	switch (cmd_idx) {
+	case ADS7846_X:
+	case ADS7846_Y:
+	case ADS7846_Z1:
+	case ADS7846_Z2:
+		return true;
+	case ADS7846_PWDOWN:
+		return false;
+	default:
+		WARN_ON_ONCE(1);
+	}
+
+	return false;
+}
+
+static int ads7846_filter(struct ads7846 *ts)
 {
-	struct spi_transfer *t =
-		list_entry(m->transfers.prev, struct spi_transfer, transfer_list);
-	struct ads7846_buf *buf = t->rx_buf;
+	struct ads7846_packet *packet = ts->packet;
+	int action;
+	int val;
+	unsigned int cmd_idx, b;
 
-	buf->data = val;
+	packet->ignore = false;
+	for (cmd_idx = packet->last_cmd_idx; cmd_idx < packet->cmds - 1; cmd_idx++) {
+		struct ads7846_buf_layout *l = &packet->l[cmd_idx];
+
+		packet->last_cmd_idx = cmd_idx;
+
+		for (b = l->skip; b < l->count; b++) {
+			val = ads7846_get_value(&packet->rx[l->offset + b]);
+
+			action = ts->filter(ts->filter_data, cmd_idx, &val);
+			if (action == ADS7846_FILTER_REPEAT) {
+				if (b == l->count - 1)
+					return -EAGAIN;
+			} else if (action == ADS7846_FILTER_OK) {
+				ads7846_set_cmd_val(ts, cmd_idx, val);
+				break;
+			} else {
+				packet->ignore = true;
+				return 0;
+			}
+		}
+	}
+
+	return 0;
 }
 
 static void ads7846_read_state(struct ads7846 *ts)
@@ -716,52 +808,26 @@ static void ads7846_read_state(struct ads7846 *ts)
 	struct ads7846_packet *packet = ts->packet;
 	struct spi_message *m;
 	int msg_idx = 0;
-	int val;
-	int action;
 	int error;
 
-	while (msg_idx < ts->msg_count) {
+	packet->last_cmd_idx = 0;
 
+	while (true) {
 		ts->wait_for_sync();
 
 		m = &ts->msg[msg_idx];
 		error = spi_sync(ts->spi, m);
 		if (error) {
 			dev_err(&ts->spi->dev, "spi_sync --> %d\n", error);
-			packet->tc.ignore = true;
+			packet->ignore = true;
 			return;
 		}
 
-		/*
-		 * Last message is power down request, no need to convert
-		 * or filter the value.
-		 */
-		if (msg_idx < ts->msg_count - 1) {
-
-			val = ads7846_get_value(ts, m);
-
-			action = ts->filter(ts->filter_data, msg_idx, &val);
-			switch (action) {
-			case ADS7846_FILTER_REPEAT:
-				continue;
-
-			case ADS7846_FILTER_IGNORE:
-				packet->tc.ignore = true;
-				msg_idx = ts->msg_count - 1;
-				continue;
-
-			case ADS7846_FILTER_OK:
-				ads7846_update_value(m, val);
-				packet->tc.ignore = false;
-				msg_idx++;
-				break;
+		error = ads7846_filter(ts);
+		if (error)
+			continue;
 
-			default:
-				BUG();
-			}
-		} else {
-			msg_idx++;
-		}
+		return;
 	}
 }
 
@@ -771,19 +837,14 @@ static void ads7846_report_state(struct ads7846 *ts)
 	unsigned int Rt;
 	u16 x, y, z1, z2;
 
-	/*
-	 * ads7846_get_value() does in-place conversion (including byte swap)
-	 * from on-the-wire format as part of debouncing to get stable
-	 * readings.
-	 */
-	x = packet->tc.x.data;
-	y = packet->tc.y.data;
+	x = packet->x;
+	y = packet->y;
 	if (ts->model == 7845) {
 		z1 = 0;
 		z2 = 0;
 	} else {
-		z1 = packet->tc.z1.data;
-		z2 = packet->tc.z2.data;
+		z1 = packet->z1;
+		z2 = packet->z2;
 	}
 
 	/* range filtering */
@@ -816,9 +877,9 @@ static void ads7846_report_state(struct ads7846 *ts)
 	 * the maximum. Don't report it to user space, repeat at least
 	 * once more the measurement
 	 */
-	if (packet->tc.ignore || Rt > ts->pressure_max) {
+	if (packet->ignore || Rt > ts->pressure_max) {
 		dev_vdbg(&ts->spi->dev, "ignored %d pressure %d\n",
-			 packet->tc.ignore, Rt);
+			 packet->ignore, Rt);
 		return;
 	}
 
@@ -979,13 +1040,59 @@ static int ads7846_setup_pendown(struct spi_device *spi,
  * Set up the transfers to read touchscreen state; this assumes we
  * use formula #2 for pressure, not #3.
  */
-static void ads7846_setup_spi_msg(struct ads7846 *ts,
+static int ads7846_setup_spi_msg(struct ads7846 *ts,
 				  const struct ads7846_platform_data *pdata)
 {
 	struct spi_message *m = &ts->msg[0];
 	struct spi_transfer *x = ts->xfer;
 	struct ads7846_packet *packet = ts->packet;
 	int vref = pdata->keep_vref_on;
+	unsigned int count, offset = 0;
+	unsigned int cmd_idx, b;
+	unsigned long time;
+	size_t size = 0;
+
+	/* time per bit */
+	time = NSEC_PER_SEC / ts->spi->max_speed_hz;
+
+	count = pdata->settle_delay_usecs * NSEC_PER_USEC / time;
+	packet->count_skip = DIV_ROUND_UP(count, 24);
+
+	if (ts->debounce_max && ts->debounce_rep)
+		/* ads7846_debounce_filter() is making ts->debounce_rep + 2
+		 * reads. So we need to get all samples for normal case. */
+		packet->count = ts->debounce_rep + 2;
+	else
+		packet->count = 1;
+
+	if (ts->model == 7846)
+		packet->cmds = 5; /* x, y, z1, z2, pwdown */
+	else
+		packet->cmds = 3; /* x, y, pwdown */
+
+	for (cmd_idx = 0; cmd_idx < packet->cmds; cmd_idx++) {
+		struct ads7846_buf_layout *l = &packet->l[cmd_idx];
+		unsigned int max_count;
+
+		if (ads7846_cmd_need_settle(cmd_idx))
+			max_count = packet->count + packet->count_skip;
+		else
+			max_count = packet->count;
+
+		l->offset = offset;
+		offset += max_count;
+		l->count = max_count;
+		l->skip = packet->count_skip;
+		size += sizeof(*packet->tx) * max_count;
+	}
+
+	packet->tx = devm_kzalloc(&ts->spi->dev, size, GFP_KERNEL);
+	if (!packet->tx)
+		return -ENOMEM;
+
+	packet->rx = devm_kzalloc(&ts->spi->dev, size, GFP_KERNEL);
+	if (!packet->rx)
+		return -ENOMEM;
 
 	if (ts->model == 7873) {
 		/*
@@ -1001,117 +1108,20 @@ static void ads7846_setup_spi_msg(struct ads7846 *ts,
 	spi_message_init(m);
 	m->context = ts;
 
-	packet->read_y_cmd.cmd = READ_Y(vref);
-	x->tx_buf = &packet->read_y_cmd;
-	x->rx_buf = &packet->tc.y;
-	x->len = 3;
-	spi_message_add_tail(x, m);
+	for (cmd_idx = 0; cmd_idx < packet->cmds; cmd_idx++) {
+		struct ads7846_buf_layout *l = &packet->l[cmd_idx];
+		u8 cmd = ads7846_get_cmd(cmd_idx, vref);
 
-	/*
-	 * The first sample after switching drivers can be low quality;
-	 * optionally discard it, using a second one after the signals
-	 * have had enough time to stabilize.
-	 */
-	if (pdata->settle_delay_usecs) {
-		x->delay.value = pdata->settle_delay_usecs;
-		x->delay.unit = SPI_DELAY_UNIT_USECS;
-		x++;
-
-		x->tx_buf = &packet->read_y_cmd;
-		x->rx_buf = &packet->tc.y;
-		x->len = 3;
-		spi_message_add_tail(x, m);
+		for (b = 0; b < l->count; b++)
+			packet->tx[l->offset + b].cmd = cmd;
 	}
 
-	ts->msg_count++;
-	m++;
-	spi_message_init(m);
-	m->context = ts;
-
-	/* turn y- off, x+ on, then leave in lowpower */
-	x++;
-	packet->read_x_cmd.cmd = READ_X(vref);
-	x->tx_buf = &packet->read_x_cmd;
-	x->rx_buf = &packet->tc.x;
-	x->len = 3;
+	x->tx_buf = packet->tx;
+	x->rx_buf = packet->rx;
+	x->len = size;
 	spi_message_add_tail(x, m);
 
-	/* ... maybe discard first sample ... */
-	if (pdata->settle_delay_usecs) {
-		x->delay.value = pdata->settle_delay_usecs;
-		x->delay.unit = SPI_DELAY_UNIT_USECS;
-
-		x++;
-		x->tx_buf = &packet->read_x_cmd;
-		x->rx_buf = &packet->tc.x;
-		x->len = 3;
-		spi_message_add_tail(x, m);
-	}
-
-	/* turn y+ off, x- on; we'll use formula #2 */
-	if (ts->model == 7846) {
-		ts->msg_count++;
-		m++;
-		spi_message_init(m);
-		m->context = ts;
-
-		x++;
-		packet->read_z1_cmd.cmd = READ_Z1(vref);
-		x->tx_buf = &packet->read_z1_cmd;
-		x->rx_buf = &packet->tc.z1;
-		x->len = 3;
-		spi_message_add_tail(x, m);
-
-		/* ... maybe discard first sample ... */
-		if (pdata->settle_delay_usecs) {
-			x->delay.value = pdata->settle_delay_usecs;
-			x->delay.unit = SPI_DELAY_UNIT_USECS;
-
-			x++;
-			x->tx_buf = &packet->read_z1_cmd;
-			x->rx_buf = &packet->tc.z1;
-			x->len = 3;
-			spi_message_add_tail(x, m);
-		}
-
-		ts->msg_count++;
-		m++;
-		spi_message_init(m);
-		m->context = ts;
-
-		x++;
-		packet->read_z2_cmd.cmd = READ_Z2(vref);
-		x->tx_buf = &packet->read_z2_cmd;
-		x->rx_buf = &packet->tc.z2;
-		x->len = 3;
-		spi_message_add_tail(x, m);
-
-		/* ... maybe discard first sample ... */
-		if (pdata->settle_delay_usecs) {
-			x->delay.value = pdata->settle_delay_usecs;
-			x->delay.unit = SPI_DELAY_UNIT_USECS;
-
-			x++;
-			x->tx_buf = &packet->read_z2_cmd;
-			x->rx_buf = &packet->tc.z2;
-			x->len = 3;
-			spi_message_add_tail(x, m);
-		}
-	}
-
-	/* power down */
-	ts->msg_count++;
-	m++;
-	spi_message_init(m);
-	m->context = ts;
-
-	x++;
-	packet->pwrdown_cmd.cmd = PWRDOWN;
-	x->tx_buf = &packet->pwrdown_cmd;
-	x->len = 3;
-
-	CS_CHANGE(*x);
-	spi_message_add_tail(x, m);
+	return 0;
 }
 
 #ifdef CONFIG_OF
diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
index d51cb910fba1..4c2b579f6c8b 100644
--- a/drivers/input/touchscreen/elants_i2c.c
+++ b/drivers/input/touchscreen/elants_i2c.c
@@ -56,6 +56,7 @@
 #define QUEUE_HEADER_SINGLE	0x62
 #define QUEUE_HEADER_NORMAL	0X63
 #define QUEUE_HEADER_WAIT	0x64
+#define QUEUE_HEADER_NORMAL2	0x66
 
 /* Command header definition */
 #define CMD_HEADER_WRITE	0x54
@@ -69,6 +70,7 @@
 #define CMD_HEADER_REK		0x66
 
 /* FW position data */
+#define PACKET_SIZE_OLD		40
 #define PACKET_SIZE		55
 #define MAX_CONTACT_NUM		10
 #define FW_POS_HEADER		0
@@ -90,6 +92,8 @@
 /* FW read command, 0x53 0x?? 0x0, 0x01 */
 #define E_ELAN_INFO_FW_VER	0x00
 #define E_ELAN_INFO_BC_VER	0x10
+#define E_ELAN_INFO_X_RES	0x60
+#define E_ELAN_INFO_Y_RES	0x63
 #define E_ELAN_INFO_REK		0xD0
 #define E_ELAN_INFO_TEST_VER	0xE0
 #define E_ELAN_INFO_FW_ID	0xF0
@@ -112,6 +116,11 @@
 #define ELAN_POWERON_DELAY_USEC	500
 #define ELAN_RESET_DELAY_MSEC	20
 
+enum elants_chip_id {
+	EKTH3500,
+	EKTF3624,
+};
+
 enum elants_state {
 	ELAN_STATE_NORMAL,
 	ELAN_WAIT_QUEUE_HEADER,
@@ -143,9 +152,12 @@ struct elants_data {
 	unsigned int y_res;
 	unsigned int x_max;
 	unsigned int y_max;
+	unsigned int phy_x;
+	unsigned int phy_y;
 	struct touchscreen_properties prop;
 
 	enum elants_state state;
+	enum elants_chip_id chip_id;
 	enum elants_iap_mode iap_mode;
 
 	/* Guards against concurrent access to the device via sysfs */
@@ -433,7 +445,51 @@ static int elants_i2c_query_bc_version(struct elants_data *ts)
 	return 0;
 }
 
-static int elants_i2c_query_ts_info(struct elants_data *ts)
+static int elants_i2c_query_ts_info_ektf(struct elants_data *ts)
+{
+	struct i2c_client *client = ts->client;
+	int error;
+	u8 resp[4];
+	u16 phy_x, phy_y;
+	const u8 get_xres_cmd[] = {
+		CMD_HEADER_READ, E_ELAN_INFO_X_RES, 0x00, 0x00
+	};
+	const u8 get_yres_cmd[] = {
+		CMD_HEADER_READ, E_ELAN_INFO_Y_RES, 0x00, 0x00
+	};
+
+	/* Get X/Y size in mm */
+	error = elants_i2c_execute_command(client, get_xres_cmd,
+					   sizeof(get_xres_cmd),
+					   resp, sizeof(resp), 1,
+					   "get X size");
+	if (error)
+		return error;
+
+	phy_x = resp[2] | ((resp[3] & 0xF0) << 4);
+
+	error = elants_i2c_execute_command(client, get_yres_cmd,
+					   sizeof(get_yres_cmd),
+					   resp, sizeof(resp), 1,
+					   "get Y size");
+	if (error)
+		return error;
+
+	phy_y = resp[2] | ((resp[3] & 0xF0) << 4);
+
+	dev_dbg(&client->dev, "phy_x=%d, phy_y=%d\n", phy_x, phy_y);
+
+	ts->phy_x = phy_x;
+	ts->phy_y = phy_y;
+
+	/* eKTF doesn't report max size, set it to default values */
+	ts->x_max = 2240 - 1;
+	ts->y_max = 1408 - 1;
+
+	return 0;
+}
+
+static int elants_i2c_query_ts_info_ekth(struct elants_data *ts)
 {
 	struct i2c_client *client = ts->client;
 	int error;
@@ -508,6 +564,8 @@ static int elants_i2c_query_ts_info(struct elants_data *ts)
 		ts->x_res = DIV_ROUND_CLOSEST(ts->x_max, phy_x);
 		ts->y_max = ELAN_TS_RESOLUTION(cols, osr);
 		ts->y_res = DIV_ROUND_CLOSEST(ts->y_max, phy_y);
+		ts->phy_x = phy_x;
+		ts->phy_y = phy_y;
 	}
 
 	return 0;
@@ -587,8 +645,19 @@ static int elants_i2c_initialize(struct elants_data *ts)
 		error = elants_i2c_query_fw_version(ts);
 	if (!error)
 		error = elants_i2c_query_test_version(ts);
-	if (!error)
-		error = elants_i2c_query_ts_info(ts);
+
+	switch (ts->chip_id) {
+	case EKTH3500:
+		if (!error)
+			error = elants_i2c_query_ts_info_ekth(ts);
+		break;
+	case EKTF3624:
+		if (!error)
+			error = elants_i2c_query_ts_info_ektf(ts);
+		break;
+	default:
+		BUG();
+	}
 
 	if (error)
 		ts->iap_mode = ELAN_IAP_RECOVERY;
@@ -853,7 +922,8 @@ out:
  * Event reporting.
  */
 
-static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf)
+static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf,
+				size_t packet_size)
 {
 	struct input_dev *input = ts->input;
 	unsigned int n_fingers;
@@ -880,8 +950,24 @@ static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf)
 			pos = &buf[FW_POS_XY + i * 3];
 			x = (((u16)pos[0] & 0xf0) << 4) | pos[1];
 			y = (((u16)pos[0] & 0x0f) << 8) | pos[2];
-			p = buf[FW_POS_PRESSURE + i];
-			w = buf[FW_POS_WIDTH + i];
+
+			/*
+			 * eKTF3624 may have use "old" touch-report format,
+			 * depending on a device and TS firmware version.
+			 * For example, ASUS Transformer devices use the "old"
+			 * format, while ASUS Nexus 7 uses the "new" formant.
+			 */
+			if (packet_size == PACKET_SIZE_OLD &&
+			    ts->chip_id == EKTF3624) {
+				w = buf[FW_POS_WIDTH + i / 2];
+				w >>= 4 * (~i & 1);
+				w |= w << 4;
+				w |= !w;
+				p = w;
+			} else {
+				p = buf[FW_POS_PRESSURE + i];
+				w = buf[FW_POS_WIDTH + i];
+			}
 
 			dev_dbg(&ts->client->dev, "i=%d x=%d y=%d p=%d w=%d\n",
 				i, x, y, p, w);
@@ -913,7 +999,8 @@ static u8 elants_i2c_calculate_checksum(u8 *buf)
 	return checksum;
 }
 
-static void elants_i2c_event(struct elants_data *ts, u8 *buf)
+static void elants_i2c_event(struct elants_data *ts, u8 *buf,
+			     size_t packet_size)
 {
 	u8 checksum = elants_i2c_calculate_checksum(buf);
 
@@ -927,7 +1014,7 @@ static void elants_i2c_event(struct elants_data *ts, u8 *buf)
 			 "%s: unknown packet type: %02x\n",
 			 __func__, buf[FW_POS_HEADER]);
 	else
-		elants_i2c_mt_event(ts, buf);
+		elants_i2c_mt_event(ts, buf, packet_size);
 }
 
 static irqreturn_t elants_i2c_irq(int irq, void *_dev)
@@ -970,7 +1057,6 @@ static irqreturn_t elants_i2c_irq(int irq, void *_dev)
 		switch (ts->buf[FW_HDR_TYPE]) {
 		case CMD_HEADER_HELLO:
 		case CMD_HEADER_RESP:
-		case CMD_HEADER_REK:
 			break;
 
 		case QUEUE_HEADER_WAIT:
@@ -985,9 +1071,24 @@ static irqreturn_t elants_i2c_irq(int irq, void *_dev)
 			break;
 
 		case QUEUE_HEADER_SINGLE:
-			elants_i2c_event(ts, &ts->buf[HEADER_SIZE]);
+			elants_i2c_event(ts, &ts->buf[HEADER_SIZE],
+					 ts->buf[FW_HDR_LENGTH]);
 			break;
 
+		case QUEUE_HEADER_NORMAL2: /* CMD_HEADER_REK */
+			/*
+			 * Depending on firmware version, eKTF3624 touchscreens
+			 * may utilize one of these opcodes for the touch events:
+			 * 0x63 (NORMAL) and 0x66 (NORMAL2).  The 0x63 is used by
+			 * older firmware version and differs from 0x66 such that
+			 * touch pressure value needs to be adjusted.  The 0x66
+			 * opcode of newer firmware is equal to 0x63 of eKTH3500.
+			 */
+			if (ts->chip_id != EKTF3624)
+				break;
+
+			fallthrough;
+
 		case QUEUE_HEADER_NORMAL:
 			report_count = ts->buf[FW_HDR_COUNT];
 			if (report_count == 0 || report_count > 3) {
@@ -998,7 +1099,12 @@ static irqreturn_t elants_i2c_irq(int irq, void *_dev)
 			}
 
 			report_len = ts->buf[FW_HDR_LENGTH] / report_count;
-			if (report_len != PACKET_SIZE) {
+
+			if (report_len == PACKET_SIZE_OLD &&
+			    ts->chip_id == EKTF3624) {
+				dev_dbg_once(&client->dev,
+					     "using old report format\n");
+			} else if (report_len != PACKET_SIZE) {
 				dev_err(&client->dev,
 					"mismatching report length: %*ph\n",
 					HEADER_SIZE, ts->buf);
@@ -1007,8 +1113,8 @@ static irqreturn_t elants_i2c_irq(int irq, void *_dev)
 
 			for (i = 0; i < report_count; i++) {
 				u8 *buf = ts->buf + HEADER_SIZE +
-							i * PACKET_SIZE;
-				elants_i2c_event(ts, buf);
+							i * report_len;
+				elants_i2c_event(ts, buf, report_len);
 			}
 			break;
 
@@ -1250,6 +1356,7 @@ static int elants_i2c_probe(struct i2c_client *client,
 	init_completion(&ts->cmd_done);
 
 	ts->client = client;
+	ts->chip_id = (enum elants_chip_id)id->driver_data;
 	i2c_set_clientdata(client, ts);
 
 	ts->vcc33 = devm_regulator_get(&client->dev, "vcc33");
@@ -1331,13 +1438,20 @@ static int elants_i2c_probe(struct i2c_client *client,
 	input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
 	input_set_abs_params(ts->input, ABS_MT_TOOL_TYPE,
 			     0, MT_TOOL_PALM, 0, 0);
+
+	touchscreen_parse_properties(ts->input, true, &ts->prop);
+
+	if (ts->chip_id == EKTF3624) {
+		/* calculate resolution from size */
+		ts->x_res = DIV_ROUND_CLOSEST(ts->prop.max_x, ts->phy_x);
+		ts->y_res = DIV_ROUND_CLOSEST(ts->prop.max_y, ts->phy_y);
+	}
+
 	input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->x_res);
 	input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->y_res);
 	if (ts->major_res > 0)
 		input_abs_set_res(ts->input, ABS_MT_TOUCH_MAJOR, ts->major_res);
 
-	touchscreen_parse_properties(ts->input, true, &ts->prop);
-
 	error = input_mt_init_slots(ts->input, MAX_CONTACT_NUM,
 				    INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
 	if (error) {
@@ -1466,14 +1580,16 @@ static SIMPLE_DEV_PM_OPS(elants_i2c_pm_ops,
 			 elants_i2c_suspend, elants_i2c_resume);
 
 static const struct i2c_device_id elants_i2c_id[] = {
-	{ DEVICE_NAME, 0 },
+	{ DEVICE_NAME, EKTH3500 },
+	{ "ekth3500", EKTH3500 },
+	{ "ektf3624", EKTF3624 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, elants_i2c_id);
 
 #ifdef CONFIG_ACPI
 static const struct acpi_device_id elants_acpi_id[] = {
-	{ "ELAN0001", 0 },
+	{ "ELAN0001", EKTH3500 },
 	{ }
 };
 MODULE_DEVICE_TABLE(acpi, elants_acpi_id);
@@ -1482,6 +1598,7 @@ MODULE_DEVICE_TABLE(acpi, elants_acpi_id);
 #ifdef CONFIG_OF
 static const struct of_device_id elants_of_match[] = {
 	{ .compatible = "elan,ekth3500" },
+	{ .compatible = "elan,ektf3624" },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, elants_of_match);
diff --git a/drivers/input/touchscreen/elo.c b/drivers/input/touchscreen/elo.c
index e0bacd34866a..96173232e53f 100644
--- a/drivers/input/touchscreen/elo.c
+++ b/drivers/input/touchscreen/elo.c
@@ -341,8 +341,10 @@ static int elo_connect(struct serio *serio, struct serio_driver *drv)
 	switch (elo->id) {
 
 	case 0: /* 10-byte protocol */
-		if (elo_setup_10(elo))
+		if (elo_setup_10(elo)) {
+			err = -EIO;
 			goto fail3;
+		}
 
 		break;
 
diff --git a/drivers/input/touchscreen/iqs5xx.c b/drivers/input/touchscreen/iqs5xx.c
index 4fd21bc3ce0f..54f30038dca4 100644
--- a/drivers/input/touchscreen/iqs5xx.c
+++ b/drivers/input/touchscreen/iqs5xx.c
@@ -2,8 +2,7 @@
 /*
  * Azoteq IQS550/572/525 Trackpad/Touchscreen Controller
  *
- * Copyright (C) 2018
- * Author: Jeff LaBundy <jeff@labundy.com>
+ * Copyright (C) 2018 Jeff LaBundy <jeff@labundy.com>
  *
  * These devices require firmware exported from a PC-based configuration tool
  * made available by the vendor. Firmware files may be pushed to the device's
@@ -12,6 +11,7 @@
  * Link to PC-based configuration tool and data sheet: http://www.azoteq.com/
  */
 
+#include <linux/bits.h>
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/err.h>
@@ -30,9 +30,9 @@
 
 #define IQS5XX_FW_FILE_LEN	64
 #define IQS5XX_NUM_RETRIES	10
-#define IQS5XX_NUM_POINTS	256
 #define IQS5XX_NUM_CONTACTS	5
 #define IQS5XX_WR_BYTES_MAX	2
+#define IQS5XX_XY_RES_MAX	0xFFFE
 
 #define IQS5XX_PROD_NUM_IQS550	40
 #define IQS5XX_PROD_NUM_IQS572	58
@@ -41,28 +41,27 @@
 #define IQS5XX_PROJ_NUM_B000	15
 #define IQS5XX_MAJOR_VER_MIN	2
 
-#define IQS5XX_RESUME		0x00
-#define IQS5XX_SUSPEND		0x01
+#define IQS5XX_SHOW_RESET	BIT(7)
+#define IQS5XX_ACK_RESET	BIT(7)
 
-#define IQS5XX_SW_INPUT_EVENT	0x10
-#define IQS5XX_SETUP_COMPLETE	0x40
-#define IQS5XX_EVENT_MODE	0x01
-#define IQS5XX_TP_EVENT		0x04
+#define IQS5XX_SUSPEND		BIT(0)
+#define IQS5XX_RESUME		0
 
-#define IQS5XX_FLIP_X		0x01
-#define IQS5XX_FLIP_Y		0x02
-#define IQS5XX_SWITCH_XY_AXIS	0x04
+#define IQS5XX_SETUP_COMPLETE	BIT(6)
+#define IQS5XX_WDT		BIT(5)
+#define IQS5XX_ALP_REATI	BIT(3)
+#define IQS5XX_REATI		BIT(2)
+
+#define IQS5XX_TP_EVENT		BIT(2)
+#define IQS5XX_EVENT_MODE	BIT(0)
 
 #define IQS5XX_PROD_NUM		0x0000
-#define IQS5XX_ABS_X		0x0016
-#define IQS5XX_ABS_Y		0x0018
+#define IQS5XX_SYS_INFO0	0x000F
+#define IQS5XX_SYS_INFO1	0x0010
 #define IQS5XX_SYS_CTRL0	0x0431
 #define IQS5XX_SYS_CTRL1	0x0432
 #define IQS5XX_SYS_CFG0		0x058E
 #define IQS5XX_SYS_CFG1		0x058F
-#define IQS5XX_TOTAL_RX		0x063D
-#define IQS5XX_TOTAL_TX		0x063E
-#define IQS5XX_XY_CFG0		0x0669
 #define IQS5XX_X_RES		0x066E
 #define IQS5XX_Y_RES		0x0670
 #define IQS5XX_CHKSM		0x83C0
@@ -99,6 +98,7 @@ struct iqs5xx_private {
 	struct i2c_client *client;
 	struct input_dev *input;
 	struct gpio_desc *reset_gpio;
+	struct touchscreen_properties prop;
 	struct mutex lock;
 	u8 bl_status;
 };
@@ -126,6 +126,14 @@ struct iqs5xx_touch_data {
 	u8 area;
 } __packed;
 
+struct iqs5xx_status {
+	u8 sys_info[2];
+	u8 num_active;
+	__be16 rel_x;
+	__be16 rel_y;
+	struct iqs5xx_touch_data touch_data[IQS5XX_NUM_CONTACTS];
+} __packed;
+
 static int iqs5xx_read_burst(struct i2c_client *client,
 			     u16 reg, void *val, u16 len)
 {
@@ -182,11 +190,6 @@ static int iqs5xx_read_word(struct i2c_client *client, u16 reg, u16 *val)
 	return 0;
 }
 
-static int iqs5xx_read_byte(struct i2c_client *client, u16 reg, u8 *val)
-{
-	return iqs5xx_read_burst(client, reg, val, sizeof(*val));
-}
-
 static int iqs5xx_write_burst(struct i2c_client *client,
 			      u16 reg, const void *val, u16 len)
 {
@@ -337,11 +340,16 @@ static int iqs5xx_bl_open(struct i2c_client *client)
 	 */
 	for (i = 0; i < IQS5XX_BL_ATTEMPTS; i++) {
 		iqs5xx_reset(client);
+		usleep_range(350, 400);
 
 		for (j = 0; j < IQS5XX_NUM_RETRIES; j++) {
 			error = iqs5xx_bl_cmd(client, IQS5XX_BL_CMD_VER, 0);
-			if (!error || error == -EINVAL)
-				return error;
+			if (!error)
+				usleep_range(10000, 10100);
+			else if (error != -EINVAL)
+				continue;
+
+			return error;
 		}
 	}
 
@@ -481,12 +489,10 @@ static void iqs5xx_close(struct input_dev *input)
 static int iqs5xx_axis_init(struct i2c_client *client)
 {
 	struct iqs5xx_private *iqs5xx = i2c_get_clientdata(client);
-	struct touchscreen_properties prop;
+	struct touchscreen_properties *prop = &iqs5xx->prop;
 	struct input_dev *input;
+	u16 max_x, max_y;
 	int error;
-	u16 max_x, max_x_hw;
-	u16 max_y, max_y_hw;
-	u8 val;
 
 	if (!iqs5xx->input) {
 		input = devm_input_allocate_device(&client->dev);
@@ -506,89 +512,39 @@ static int iqs5xx_axis_init(struct i2c_client *client)
 		iqs5xx->input = input;
 	}
 
-	touchscreen_parse_properties(iqs5xx->input, true, &prop);
-
-	error = iqs5xx_read_byte(client, IQS5XX_TOTAL_RX, &val);
-	if (error)
-		return error;
-	max_x_hw = (val - 1) * IQS5XX_NUM_POINTS;
-
-	error = iqs5xx_read_byte(client, IQS5XX_TOTAL_TX, &val);
+	error = iqs5xx_read_word(client, IQS5XX_X_RES, &max_x);
 	if (error)
 		return error;
-	max_y_hw = (val - 1) * IQS5XX_NUM_POINTS;
 
-	error = iqs5xx_read_byte(client, IQS5XX_XY_CFG0, &val);
+	error = iqs5xx_read_word(client, IQS5XX_Y_RES, &max_y);
 	if (error)
 		return error;
 
-	if (val & IQS5XX_SWITCH_XY_AXIS)
-		swap(max_x_hw, max_y_hw);
+	input_abs_set_max(iqs5xx->input, ABS_MT_POSITION_X, max_x);
+	input_abs_set_max(iqs5xx->input, ABS_MT_POSITION_Y, max_y);
 
-	if (prop.swap_x_y)
-		val ^= IQS5XX_SWITCH_XY_AXIS;
-
-	if (prop.invert_x)
-		val ^= prop.swap_x_y ? IQS5XX_FLIP_Y : IQS5XX_FLIP_X;
-
-	if (prop.invert_y)
-		val ^= prop.swap_x_y ? IQS5XX_FLIP_X : IQS5XX_FLIP_Y;
-
-	error = iqs5xx_write_byte(client, IQS5XX_XY_CFG0, val);
-	if (error)
-		return error;
+	touchscreen_parse_properties(iqs5xx->input, true, prop);
 
-	if (prop.max_x > max_x_hw) {
+	if (prop->max_x > IQS5XX_XY_RES_MAX) {
 		dev_err(&client->dev, "Invalid maximum x-coordinate: %u > %u\n",
-			prop.max_x, max_x_hw);
+			prop->max_x, IQS5XX_XY_RES_MAX);
 		return -EINVAL;
-	} else if (prop.max_x == 0) {
-		error = iqs5xx_read_word(client, IQS5XX_X_RES, &max_x);
+	} else if (prop->max_x != max_x) {
+		error = iqs5xx_write_word(client, IQS5XX_X_RES, prop->max_x);
 		if (error)
 			return error;
-
-		input_abs_set_max(iqs5xx->input,
-				  prop.swap_x_y ? ABS_MT_POSITION_Y :
-						  ABS_MT_POSITION_X,
-				  max_x);
-	} else {
-		max_x = (u16)prop.max_x;
 	}
 
-	if (prop.max_y > max_y_hw) {
+	if (prop->max_y > IQS5XX_XY_RES_MAX) {
 		dev_err(&client->dev, "Invalid maximum y-coordinate: %u > %u\n",
-			prop.max_y, max_y_hw);
+			prop->max_y, IQS5XX_XY_RES_MAX);
 		return -EINVAL;
-	} else if (prop.max_y == 0) {
-		error = iqs5xx_read_word(client, IQS5XX_Y_RES, &max_y);
+	} else if (prop->max_y != max_y) {
+		error = iqs5xx_write_word(client, IQS5XX_Y_RES, prop->max_y);
 		if (error)
 			return error;
-
-		input_abs_set_max(iqs5xx->input,
-				  prop.swap_x_y ? ABS_MT_POSITION_X :
-						  ABS_MT_POSITION_Y,
-				  max_y);
-	} else {
-		max_y = (u16)prop.max_y;
 	}
 
-	/*
-	 * Write horizontal and vertical resolution to the device in case its
-	 * original defaults were overridden or swapped as per the properties
-	 * specified in the device tree.
-	 */
-	error = iqs5xx_write_word(client,
-				  prop.swap_x_y ? IQS5XX_Y_RES : IQS5XX_X_RES,
-				  max_x);
-	if (error)
-		return error;
-
-	error = iqs5xx_write_word(client,
-				  prop.swap_x_y ? IQS5XX_X_RES : IQS5XX_Y_RES,
-				  max_y);
-	if (error)
-		return error;
-
 	error = input_mt_init_slots(iqs5xx->input, IQS5XX_NUM_CONTACTS,
 				    INPUT_MT_DIRECT);
 	if (error)
@@ -603,7 +559,6 @@ static int iqs5xx_dev_init(struct i2c_client *client)
 	struct iqs5xx_private *iqs5xx = i2c_get_clientdata(client);
 	struct iqs5xx_dev_id_info *dev_id_info;
 	int error;
-	u8 val;
 	u8 buf[sizeof(*dev_id_info) + 1];
 
 	error = iqs5xx_read_burst(client, IQS5XX_PROD_NUM,
@@ -666,18 +621,18 @@ static int iqs5xx_dev_init(struct i2c_client *client)
 	if (error)
 		return error;
 
-	error = iqs5xx_read_byte(client, IQS5XX_SYS_CFG0, &val);
+	error = iqs5xx_write_byte(client, IQS5XX_SYS_CTRL0, IQS5XX_ACK_RESET);
 	if (error)
 		return error;
 
-	val |= IQS5XX_SETUP_COMPLETE;
-	val &= ~IQS5XX_SW_INPUT_EVENT;
-	error = iqs5xx_write_byte(client, IQS5XX_SYS_CFG0, val);
+	error = iqs5xx_write_byte(client, IQS5XX_SYS_CFG0,
+				  IQS5XX_SETUP_COMPLETE | IQS5XX_WDT |
+				  IQS5XX_ALP_REATI | IQS5XX_REATI);
 	if (error)
 		return error;
 
-	val = IQS5XX_TP_EVENT | IQS5XX_EVENT_MODE;
-	error = iqs5xx_write_byte(client, IQS5XX_SYS_CFG1, val);
+	error = iqs5xx_write_byte(client, IQS5XX_SYS_CFG1,
+				  IQS5XX_TP_EVENT | IQS5XX_EVENT_MODE);
 	if (error)
 		return error;
 
@@ -688,13 +643,12 @@ static int iqs5xx_dev_init(struct i2c_client *client)
 	iqs5xx->bl_status = dev_id_info->bl_status;
 
 	/*
-	 * Closure of the first communication window that appears following the
-	 * release of reset appears to kick off an initialization period during
-	 * which further communication is met with clock stretching. The return
-	 * from this function is delayed so that further communication attempts
-	 * avoid this period.
+	 * The following delay allows ATI to complete before the open and close
+	 * callbacks are free to elicit I2C communication. Any attempts to read
+	 * from or write to the device during this time may face extended clock
+	 * stretching and prompt the I2C controller to report an error.
 	 */
-	msleep(100);
+	msleep(250);
 
 	return 0;
 }
@@ -702,7 +656,7 @@ static int iqs5xx_dev_init(struct i2c_client *client)
 static irqreturn_t iqs5xx_irq(int irq, void *data)
 {
 	struct iqs5xx_private *iqs5xx = data;
-	struct iqs5xx_touch_data touch_data[IQS5XX_NUM_CONTACTS];
+	struct iqs5xx_status status;
 	struct i2c_client *client = iqs5xx->client;
 	struct input_dev *input = iqs5xx->input;
 	int error, i;
@@ -715,21 +669,35 @@ static irqreturn_t iqs5xx_irq(int irq, void *data)
 	if (iqs5xx->bl_status == IQS5XX_BL_STATUS_RESET)
 		return IRQ_NONE;
 
-	error = iqs5xx_read_burst(client, IQS5XX_ABS_X,
-				  touch_data, sizeof(touch_data));
+	error = iqs5xx_read_burst(client, IQS5XX_SYS_INFO0,
+				  &status, sizeof(status));
 	if (error)
 		return IRQ_NONE;
 
-	for (i = 0; i < ARRAY_SIZE(touch_data); i++) {
-		u16 pressure = be16_to_cpu(touch_data[i].strength);
+	if (status.sys_info[0] & IQS5XX_SHOW_RESET) {
+		dev_err(&client->dev, "Unexpected device reset\n");
+
+		error = iqs5xx_dev_init(client);
+		if (error) {
+			dev_err(&client->dev,
+				"Failed to re-initialize device: %d\n", error);
+			return IRQ_NONE;
+		}
+
+		return IRQ_HANDLED;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(status.touch_data); i++) {
+		struct iqs5xx_touch_data *touch_data = &status.touch_data[i];
+		u16 pressure = be16_to_cpu(touch_data->strength);
 
 		input_mt_slot(input, i);
 		if (input_mt_report_slot_state(input, MT_TOOL_FINGER,
 					       pressure != 0)) {
-			input_report_abs(input, ABS_MT_POSITION_X,
-					 be16_to_cpu(touch_data[i].abs_x));
-			input_report_abs(input, ABS_MT_POSITION_Y,
-					 be16_to_cpu(touch_data[i].abs_y));
+			touchscreen_report_pos(iqs5xx->input, &iqs5xx->prop,
+					       be16_to_cpu(touch_data->abs_x),
+					       be16_to_cpu(touch_data->abs_y),
+					       true);
 			input_report_abs(input, ABS_MT_PRESSURE, pressure);
 		}
 	}
@@ -884,7 +852,7 @@ static int iqs5xx_fw_file_parse(struct i2c_client *client,
 static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file)
 {
 	struct iqs5xx_private *iqs5xx = i2c_get_clientdata(client);
-	int error;
+	int error, error_bl = 0;
 	u8 *pmap;
 
 	if (iqs5xx->bl_status == IQS5XX_BL_STATUS_NONE)
@@ -938,6 +906,7 @@ err_reset:
 		usleep_range(10000, 10100);
 	}
 
+	error_bl = error;
 	error = iqs5xx_dev_init(client);
 	if (!error && iqs5xx->bl_status == IQS5XX_BL_STATUS_RESET)
 		error = -EINVAL;
@@ -949,11 +918,15 @@ err_reset:
 err_kfree:
 	kfree(pmap);
 
+	if (error_bl)
+		return error_bl;
+
 	return error;
 }
 
-static ssize_t fw_file_store(struct device *dev, struct device_attribute *attr,
-				const char *buf, size_t count)
+static ssize_t fw_file_store(struct device *dev,
+			     struct device_attribute *attr, const char *buf,
+			     size_t count)
 {
 	struct iqs5xx_private *iqs5xx = dev_get_drvdata(dev);
 	struct i2c_client *client = iqs5xx->client;
@@ -1012,7 +985,7 @@ static int __maybe_unused iqs5xx_suspend(struct device *dev)
 	struct input_dev *input = iqs5xx->input;
 	int error = 0;
 
-	if (!input)
+	if (!input || device_may_wakeup(dev))
 		return error;
 
 	mutex_lock(&input->mutex);
@@ -1031,7 +1004,7 @@ static int __maybe_unused iqs5xx_resume(struct device *dev)
 	struct input_dev *input = iqs5xx->input;
 	int error = 0;
 
-	if (!input)
+	if (!input || device_may_wakeup(dev))
 		return error;
 
 	mutex_lock(&input->mutex);
diff --git a/drivers/input/touchscreen/melfas_mip4.c b/drivers/input/touchscreen/melfas_mip4.c
index c0050044a5a9..225796a3f546 100644
--- a/drivers/input/touchscreen/melfas_mip4.c
+++ b/drivers/input/touchscreen/melfas_mip4.c
@@ -465,13 +465,13 @@ static void mip4_report_keys(struct mip4_ts *ts, u8 *packet)
 static void mip4_report_touch(struct mip4_ts *ts, u8 *packet)
 {
 	int id;
-	bool hover;
-	bool palm;
+	bool __always_unused hover;
+	bool __always_unused palm;
 	bool state;
 	u16 x, y;
-	u8 pressure_stage = 0;
+	u8 __always_unused pressure_stage = 0;
 	u8 pressure;
-	u8 size;
+	u8 __always_unused size;
 	u8 touch_major;
 	u8 touch_minor;
 
diff --git a/drivers/input/touchscreen/raydium_i2c_ts.c b/drivers/input/touchscreen/raydium_i2c_ts.c
index 603a948460d6..4d2d22a86977 100644
--- a/drivers/input/touchscreen/raydium_i2c_ts.c
+++ b/drivers/input/touchscreen/raydium_i2c_ts.c
@@ -445,6 +445,7 @@ static int raydium_i2c_write_object(struct i2c_client *client,
 				    enum raydium_bl_ack state)
 {
 	int error;
+	static const u8 cmd[] = { 0xFF, 0x39 };
 
 	error = raydium_i2c_send(client, RM_CMD_BOOT_WRT, data, len);
 	if (error) {
@@ -453,7 +454,7 @@ static int raydium_i2c_write_object(struct i2c_client *client,
 		return error;
 	}
 
-	error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, NULL, 0);
+	error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, cmd, sizeof(cmd));
 	if (error) {
 		dev_err(&client->dev, "Ack obj command failed: %d\n", error);
 		return error;
diff --git a/drivers/input/touchscreen/st1232.c b/drivers/input/touchscreen/st1232.c
index b4e7bcbe9b91..6abae665ca71 100644
--- a/drivers/input/touchscreen/st1232.c
+++ b/drivers/input/touchscreen/st1232.c
@@ -94,8 +94,13 @@ static int st1232_ts_wait_ready(struct st1232_ts_data *ts)
 
 	for (retries = 10; retries; retries--) {
 		error = st1232_ts_read_data(ts, REG_STATUS, 1);
-		if (!error && ts->read_buf[0] == (STATUS_NORMAL | ERROR_NONE))
-			return 0;
+		if (!error) {
+			switch (ts->read_buf[0]) {
+			case STATUS_NORMAL | ERROR_NONE:
+			case STATUS_IDLE | ERROR_NONE:
+				return 0;
+			}
+		}
 
 		usleep_range(1000, 2000);
 	}
diff --git a/drivers/input/touchscreen/stmpe-ts.c b/drivers/input/touchscreen/stmpe-ts.c
index cd747725589b..25c45c3a3561 100644
--- a/drivers/input/touchscreen/stmpe-ts.c
+++ b/drivers/input/touchscreen/stmpe-ts.c
@@ -52,6 +52,7 @@
  * @idev: registered input device
  * @work: a work item used to scan the device
  * @dev: a pointer back to the MFD cell struct device*
+ * @prop: Touchscreen properties
  * @ave_ctrl: Sample average control
  * (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples)
  * @touch_det_delay: Touch detect interrupt delay
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index 620cdd7d214a..12f2562b0141 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -787,6 +787,7 @@ static int sur40_probe(struct usb_interface *interface,
 		dev_err(&interface->dev,
 			"Unable to register video controls.");
 		v4l2_ctrl_handler_free(&sur40->hdl);
+		error = sur40->hdl.error;
 		goto err_unreg_v4l2;
 	}
 
diff --git a/drivers/input/touchscreen/surface3_spi.c b/drivers/input/touchscreen/surface3_spi.c
index 731454599fce..1da23e5585a0 100644
--- a/drivers/input/touchscreen/surface3_spi.c
+++ b/drivers/input/touchscreen/surface3_spi.c
@@ -94,9 +94,7 @@ static void surface3_spi_report_touch(struct surface3_ts_data *ts_data,
 
 static void surface3_spi_process_touch(struct surface3_ts_data *ts_data, u8 *data)
 {
-	u16 timestamp;
 	unsigned int i;
-	timestamp = get_unaligned_le16(&data[15]);
 
 	for (i = 0; i < 13; i++) {
 		struct surface3_ts_data_finger *finger;
diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 397cb1d3f481..c847453a03c2 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c
@@ -1044,6 +1044,7 @@ static void nexio_exit(struct usbtouch_usb *usbtouch)
 
 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
 {
+	struct device *dev = &usbtouch->interface->dev;
 	struct nexio_touch_packet *packet = (void *) pkt;
 	struct nexio_priv *priv = usbtouch->priv;
 	unsigned int data_len = be16_to_cpu(packet->data_len);
@@ -1062,6 +1063,8 @@ static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
 
 	/* send ACK */
 	ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
+	if (ret)
+		dev_warn(dev, "Failed to submit ACK URB: %d\n", ret);
 
 	if (!usbtouch->type->max_xc) {
 		usbtouch->type->max_xc = 2 * x_len;
diff --git a/drivers/input/touchscreen/zinitix.c b/drivers/input/touchscreen/zinitix.c
index a3e3adbabc67..3b636beb583c 100644
--- a/drivers/input/touchscreen/zinitix.c
+++ b/drivers/input/touchscreen/zinitix.c
@@ -161,7 +161,7 @@ static int zinitix_read_data(struct i2c_client *client,
 
 	ret = i2c_master_recv(client, (u8 *)values, length);
 	if (ret != length)
-		return ret < 0 ? ret : -EIO; ;
+		return ret < 0 ? ret : -EIO;
 
 	return 0;
 }
@@ -190,7 +190,7 @@ static int zinitix_write_cmd(struct i2c_client *client, u16 reg)
 	return 0;
 }
 
-static bool zinitix_init_touch(struct bt541_ts_data *bt541)
+static int zinitix_init_touch(struct bt541_ts_data *bt541)
 {
 	struct i2c_client *client = bt541->client;
 	int i;