Linux-libre 4.2-gnu

13 files changed, 1343 insertions, 96 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 80f638670..a854c6e5f 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -658,6 +658,18 @@ config TOUCHSCREEN_PIXCIR
 	  To compile this driver as a module, choose M here: the
 	  module will be called pixcir_i2c_ts.
 
+config TOUCHSCREEN_WDT87XX_I2C
+	tristate "Weida HiTech I2C touchscreen"
+	depends on I2C
+	help
+	  Say Y here if you have a Weida WDT87XX I2C touchscreen
+	  connected to your system.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called wdt87xx_i2c.
+
 config TOUCHSCREEN_WM831X
 	tristate "Support for WM831x touchscreen controllers"
 	depends on MFD_WM831X
@@ -958,6 +970,7 @@ config TOUCHSCREEN_ST1232
 config TOUCHSCREEN_STMPE
 	tristate "STMicroelectronics STMPE touchscreens"
 	depends on MFD_STMPE
+	depends on (OF || COMPILE_TEST)
 	help
 	  Say Y here if you want support for STMicroelectronics
 	  STMPE touchscreen controllers.
@@ -979,8 +992,7 @@ config TOUCHSCREEN_SUN4I
 
 config TOUCHSCREEN_SUR40
 	tristate "Samsung SUR40 (Surface 2.0/PixelSense) touchscreen"
-	depends on USB
-	depends on MEDIA_USB_SUPPORT
+	depends on USB && MEDIA_USB_SUPPORT && HAS_DMA
 	select INPUT_POLLDEV
 	select VIDEOBUF2_DMA_SG
 	help
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 44deea743..fa3d33bac 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -72,6 +72,7 @@ obj-$(CONFIG_TOUCHSCREEN_TSC2007)	+= tsc2007.o
 obj-$(CONFIG_TOUCHSCREEN_UCB1400)	+= ucb1400_ts.o
 obj-$(CONFIG_TOUCHSCREEN_WACOM_W8001)	+= wacom_w8001.o
 obj-$(CONFIG_TOUCHSCREEN_WACOM_I2C)	+= wacom_i2c.o
+obj-$(CONFIG_TOUCHSCREEN_WDT87XX_I2C)	+= wdt87xx_i2c.o
 obj-$(CONFIG_TOUCHSCREEN_WM831X)	+= wm831x-ts.o
 obj-$(CONFIG_TOUCHSCREEN_WM97XX)	+= wm97xx-ts.o
 wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9705)	+= wm9705.o
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index b406ed0af..e4220f243 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -726,15 +726,15 @@ static void mxt_input_button(struct mxt_data *data, u8 *message)
 {
 	struct input_dev *input = data->input_dev;
 	const struct mxt_platform_data *pdata = data->pdata;
-	bool button;
 	int i;
 
-	/* Active-low switch */
 	for (i = 0; i < pdata->t19_num_keys; i++) {
 		if (pdata->t19_keymap[i] == KEY_RESERVED)
 			continue;
-		button = !(message[1] & (1 << i));
-		input_report_key(input, pdata->t19_keymap[i], button);
+
+		/* Active-low switch */
+		input_report_key(input, pdata->t19_keymap[i],
+				 !(message[1] & BIT(i)));
 	}
 }
 
diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c
index 568a3d340..5ed310574 100644
--- a/drivers/input/touchscreen/cyttsp4_core.c
+++ b/drivers/input/touchscreen/cyttsp4_core.c
@@ -775,7 +775,6 @@ static void cyttsp4_get_touch(struct cyttsp4_mt_data *md,
 	struct device *dev = &md->input->dev;
 	struct cyttsp4_sysinfo *si = md->si;
 	enum cyttsp4_tch_abs abs;
-	int tmp;
 	bool flipped;
 
 	for (abs = CY_TCH_X; abs < CY_TCH_NUM_ABS; abs++) {
@@ -790,9 +789,7 @@ static void cyttsp4_get_touch(struct cyttsp4_mt_data *md,
 	}
 
 	if (md->pdata->flags & CY_FLAG_FLIP) {
-		tmp = touch->abs[CY_TCH_X];
-		touch->abs[CY_TCH_X] = touch->abs[CY_TCH_Y];
-		touch->abs[CY_TCH_Y] = tmp;
+		swap(touch->abs[CY_TCH_X], touch->abs[CY_TCH_Y]);
 		flipped = true;
 	} else
 		flipped = false;
diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index e6aef3e48..394b1de9a 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -1035,20 +1035,15 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
 	input->id.bustype = BUS_I2C;
 	input->dev.parent = &client->dev;
 
-	__set_bit(EV_KEY, input->evbit);
-	__set_bit(EV_ABS, input->evbit);
-	__set_bit(BTN_TOUCH, input->keybit);
-	input_set_abs_params(input, ABS_X, 0, tsdata->num_x * 64 - 1, 0, 0);
-	input_set_abs_params(input, ABS_Y, 0, tsdata->num_y * 64 - 1, 0, 0);
 	input_set_abs_params(input, ABS_MT_POSITION_X,
 			     0, tsdata->num_x * 64 - 1, 0, 0);
 	input_set_abs_params(input, ABS_MT_POSITION_Y,
 			     0, tsdata->num_y * 64 - 1, 0, 0);
 
 	if (!pdata)
-		touchscreen_parse_of_params(input);
+		touchscreen_parse_of_params(input, true);
 
-	error = input_mt_init_slots(input, MAX_SUPPORT_POINTS, 0);
+	error = input_mt_init_slots(input, MAX_SUPPORT_POINTS, INPUT_MT_DIRECT);
 	if (error) {
 		dev_err(&client->dev, "Unable to init MT slots.\n");
 		return error;
diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index 3af16984d..e36162b28 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -15,6 +15,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/dmi.h>
 #include <linux/i2c.h>
 #include <linux/input.h>
 #include <linux/input/mt.h>
@@ -34,6 +35,7 @@ struct goodix_ts_data {
 	int abs_y_max;
 	unsigned int max_touch_num;
 	unsigned int int_trigger_type;
+	bool rotated_screen;
 };
 
 #define GOODIX_MAX_HEIGHT		4096
@@ -47,7 +49,7 @@ struct goodix_ts_data {
 /* Register defines */
 #define GOODIX_READ_COOR_ADDR		0x814E
 #define GOODIX_REG_CONFIG_DATA		0x8047
-#define GOODIX_REG_VERSION		0x8140
+#define GOODIX_REG_ID			0x8140
 
 #define RESOLUTION_LOC		1
 #define MAX_CONTACTS_LOC	5
@@ -60,6 +62,30 @@ static const unsigned long goodix_irq_flags[] = {
 	IRQ_TYPE_LEVEL_HIGH,
 };
 
+/*
+ * Those tablets have their coordinates origin at the bottom right
+ * of the tablet, as if rotated 180 degrees
+ */
+static const struct dmi_system_id rotated_screen[] = {
+#if defined(CONFIG_DMI) && defined(CONFIG_X86)
+	{
+		.ident = "WinBook TW100",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "WinBook"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "TW100")
+		}
+	},
+	{
+		.ident = "WinBook TW700",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "WinBook"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "TW700")
+		},
+	},
+#endif
+	{}
+};
+
 /**
  * goodix_i2c_read - read data from a register of the i2c slave device.
  *
@@ -69,7 +95,7 @@ static const unsigned long goodix_irq_flags[] = {
  * @len: length of the buffer to write
  */
 static int goodix_i2c_read(struct i2c_client *client,
-				u16 reg, u8 *buf, int len)
+			   u16 reg, u8 *buf, int len)
 {
 	struct i2c_msg msgs[2];
 	u16 wbuf = cpu_to_be16(reg);
@@ -78,7 +104,7 @@ static int goodix_i2c_read(struct i2c_client *client,
 	msgs[0].flags = 0;
 	msgs[0].addr  = client->addr;
 	msgs[0].len   = 2;
-	msgs[0].buf   = (u8 *) &wbuf;
+	msgs[0].buf   = (u8 *)&wbuf;
 
 	msgs[1].flags = I2C_M_RD;
 	msgs[1].addr  = client->addr;
@@ -101,6 +127,9 @@ static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
 		return error;
 	}
 
+	if (!(data[0] & 0x80))
+		return -EAGAIN;
+
 	touch_num = data[0] & 0x0f;
 	if (touch_num > ts->max_touch_num)
 		return -EPROTO;
@@ -126,6 +155,11 @@ static void goodix_ts_report_touch(struct goodix_ts_data *ts, u8 *coor_data)
 	int input_y = get_unaligned_le16(&coor_data[3]);
 	int input_w = get_unaligned_le16(&coor_data[5]);
 
+	if (ts->rotated_screen) {
+		input_x = ts->abs_x_max - input_x;
+		input_y = ts->abs_y_max - input_y;
+	}
+
 	input_mt_slot(ts->input_dev, id);
 	input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
 	input_report_abs(ts->input_dev, ABS_MT_POSITION_X, input_x);
@@ -144,7 +178,7 @@ static void goodix_ts_report_touch(struct goodix_ts_data *ts, u8 *coor_data)
  */
 static void goodix_process_events(struct goodix_ts_data *ts)
 {
-	u8  point_data[1 + GOODIX_CONTACT_SIZE * ts->max_touch_num];
+	u8  point_data[1 + GOODIX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
 	int touch_num;
 	int i;
 
@@ -196,8 +230,8 @@ static void goodix_read_config(struct goodix_ts_data *ts)
 	int error;
 
 	error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA,
-			      config,
-			   GOODIX_CONFIG_MAX_LENGTH);
+				config,
+				GOODIX_CONFIG_MAX_LENGTH);
 	if (error) {
 		dev_warn(&ts->client->dev,
 			 "Error reading config (%d), using defaults\n",
@@ -220,6 +254,11 @@ static void goodix_read_config(struct goodix_ts_data *ts)
 		ts->abs_y_max = GOODIX_MAX_HEIGHT;
 		ts->max_touch_num = GOODIX_MAX_CONTACTS;
 	}
+
+	ts->rotated_screen = dmi_check_system(rotated_screen);
+	if (ts->rotated_screen)
+		dev_dbg(&ts->client->dev,
+			 "Applying '180 degrees rotated screen' quirk\n");
 }
 
 /**
@@ -227,22 +266,28 @@ static void goodix_read_config(struct goodix_ts_data *ts)
  *
  * @client: the i2c client
  * @version: output buffer containing the version on success
+ * @id: output buffer containing the id on success
  */
-static int goodix_read_version(struct i2c_client *client, u16 *version)
+static int goodix_read_version(struct i2c_client *client, u16 *version, u16 *id)
 {
 	int error;
 	u8 buf[6];
+	char id_str[5];
 
-	error = goodix_i2c_read(client, GOODIX_REG_VERSION, buf, sizeof(buf));
+	error = goodix_i2c_read(client, GOODIX_REG_ID, buf, sizeof(buf));
 	if (error) {
 		dev_err(&client->dev, "read version failed: %d\n", error);
 		return error;
 	}
 
-	if (version)
-		*version = get_unaligned_le16(&buf[4]);
+	memcpy(id_str, buf, 4);
+	id_str[4] = 0;
+	if (kstrtou16(id_str, 10, id))
+		*id = 0x1001;
+
+	*version = get_unaligned_le16(&buf[4]);
 
-	dev_info(&client->dev, "IC VERSION: %6ph\n", buf);
+	dev_info(&client->dev, "ID %d, version: %04x\n", *id, *version);
 
 	return 0;
 }
@@ -276,10 +321,13 @@ static int goodix_i2c_test(struct i2c_client *client)
  * goodix_request_input_dev - Allocate, populate and register the input device
  *
  * @ts: our goodix_ts_data pointer
+ * @version: device firmware version
+ * @id: device ID
  *
  * Must be called during probe
  */
-static int goodix_request_input_dev(struct goodix_ts_data *ts)
+static int goodix_request_input_dev(struct goodix_ts_data *ts, u16 version,
+				    u16 id)
 {
 	int error;
 
@@ -289,14 +337,10 @@ static int goodix_request_input_dev(struct goodix_ts_data *ts)
 		return -ENOMEM;
 	}
 
-	ts->input_dev->evbit[0] = BIT_MASK(EV_SYN) |
-				  BIT_MASK(EV_KEY) |
-				  BIT_MASK(EV_ABS);
-
-	input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, 0,
-				ts->abs_x_max, 0, 0);
-	input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, 0,
-				ts->abs_y_max, 0, 0);
+	input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X,
+			     0, ts->abs_x_max, 0, 0);
+	input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y,
+			     0, ts->abs_y_max, 0, 0);
 	input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
 	input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
 
@@ -307,8 +351,8 @@ static int goodix_request_input_dev(struct goodix_ts_data *ts)
 	ts->input_dev->phys = "input/ts";
 	ts->input_dev->id.bustype = BUS_I2C;
 	ts->input_dev->id.vendor = 0x0416;
-	ts->input_dev->id.product = 0x1001;
-	ts->input_dev->id.version = 10427;
+	ts->input_dev->id.product = id;
+	ts->input_dev->id.version = version;
 
 	error = input_register_device(ts->input_dev);
 	if (error) {
@@ -326,7 +370,7 @@ static int goodix_ts_probe(struct i2c_client *client,
 	struct goodix_ts_data *ts;
 	unsigned long irq_flags;
 	int error;
-	u16 version_info;
+	u16 version_info, id_info;
 
 	dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr);
 
@@ -348,7 +392,7 @@ static int goodix_ts_probe(struct i2c_client *client,
 		return error;
 	}
 
-	error = goodix_read_version(client, &version_info);
+	error = goodix_read_version(client, &version_info, &id_info);
 	if (error) {
 		dev_err(&client->dev, "Read version failed.\n");
 		return error;
@@ -356,7 +400,7 @@ static int goodix_ts_probe(struct i2c_client *client,
 
 	goodix_read_config(ts);
 
-	error = goodix_request_input_dev(ts);
+	error = goodix_request_input_dev(ts, version_info, id_info);
 	if (error)
 		return error;
 
diff --git a/drivers/input/touchscreen/of_touchscreen.c b/drivers/input/touchscreen/of_touchscreen.c
index b82b5207c..806cd0ad1 100644
--- a/drivers/input/touchscreen/of_touchscreen.c
+++ b/drivers/input/touchscreen/of_touchscreen.c
@@ -14,14 +14,22 @@
 #include <linux/input/mt.h>
 #include <linux/input/touchscreen.h>
 
-static u32 of_get_optional_u32(struct device_node *np,
-			       const char *property)
+static bool touchscreen_get_prop_u32(struct device_node *np,
+				     const char *property,
+				     unsigned int default_value,
+				     unsigned int *value)
 {
-	u32 val = 0;
+	u32 val;
+	int error;
 
-	of_property_read_u32(np, property, &val);
+	error = of_property_read_u32(np, property, &val);
+	if (error) {
+		*value = default_value;
+		return false;
+	}
 
-	return val;
+	*value = val;
+	return true;
 }
 
 static void touchscreen_set_params(struct input_dev *dev,
@@ -54,34 +62,45 @@ static void touchscreen_set_params(struct input_dev *dev,
  * input device accordingly. The function keeps previously setuped default
  * values if no value is specified via DT.
  */
-void touchscreen_parse_of_params(struct input_dev *dev)
+void touchscreen_parse_of_params(struct input_dev *dev, bool multitouch)
 {
 	struct device_node *np = dev->dev.parent->of_node;
-	u32 maximum, fuzz;
+	unsigned int axis;
+	unsigned int maximum, fuzz;
+	bool data_present;
 
 	input_alloc_absinfo(dev);
 	if (!dev->absinfo)
 		return;
 
-	maximum = of_get_optional_u32(np, "touchscreen-size-x");
-	fuzz = of_get_optional_u32(np, "touchscreen-fuzz-x");
-	if (maximum || fuzz) {
-		touchscreen_set_params(dev, ABS_X, maximum, fuzz);
-		touchscreen_set_params(dev, ABS_MT_POSITION_X, maximum, fuzz);
-	}
+	axis = multitouch ? ABS_MT_POSITION_X : ABS_X;
+	data_present = touchscreen_get_prop_u32(np, "touchscreen-size-x",
+						input_abs_get_max(dev, axis),
+						&maximum) |
+		       touchscreen_get_prop_u32(np, "touchscreen-fuzz-x",
+						input_abs_get_fuzz(dev, axis),
+						&fuzz);
+	if (data_present)
+		touchscreen_set_params(dev, axis, maximum, fuzz);
 
-	maximum = of_get_optional_u32(np, "touchscreen-size-y");
-	fuzz = of_get_optional_u32(np, "touchscreen-fuzz-y");
-	if (maximum || fuzz) {
-		touchscreen_set_params(dev, ABS_Y, maximum, fuzz);
-		touchscreen_set_params(dev, ABS_MT_POSITION_Y, maximum, fuzz);
-	}
+	axis = multitouch ? ABS_MT_POSITION_Y : ABS_Y;
+	data_present = touchscreen_get_prop_u32(np, "touchscreen-size-y",
+						input_abs_get_max(dev, axis),
+						&maximum) |
+		       touchscreen_get_prop_u32(np, "touchscreen-fuzz-y",
+						input_abs_get_fuzz(dev, axis),
+						&fuzz);
+	if (data_present)
+		touchscreen_set_params(dev, axis, maximum, fuzz);
 
-	maximum = of_get_optional_u32(np, "touchscreen-max-pressure");
-	fuzz = of_get_optional_u32(np, "touchscreen-fuzz-pressure");
-	if (maximum || fuzz) {
-		touchscreen_set_params(dev, ABS_PRESSURE, maximum, fuzz);
-		touchscreen_set_params(dev, ABS_MT_PRESSURE, maximum, fuzz);
-	}
+	axis = multitouch ? ABS_MT_PRESSURE : ABS_PRESSURE;
+	data_present = touchscreen_get_prop_u32(np, "touchscreen-max-pressure",
+						input_abs_get_max(dev, axis),
+						&maximum) |
+		       touchscreen_get_prop_u32(np, "touchscreen-fuzz-pressure",
+						input_abs_get_fuzz(dev, axis),
+						&fuzz);
+	if (data_present)
+		touchscreen_set_params(dev, axis, maximum, fuzz);
 }
 EXPORT_SYMBOL(touchscreen_parse_of_params);
diff --git a/drivers/input/touchscreen/s3c2410_ts.c b/drivers/input/touchscreen/s3c2410_ts.c
index bdfa27dc0..a4a103e1d 100644
--- a/drivers/input/touchscreen/s3c2410_ts.c
+++ b/drivers/input/touchscreen/s3c2410_ts.c
@@ -411,7 +411,7 @@ static const struct dev_pm_ops s3c_ts_pmops = {
 };
 #endif
 
-static struct platform_device_id s3cts_driver_ids[] = {
+static const struct platform_device_id s3cts_driver_ids[] = {
 	{ "s3c2410-ts", 0 },
 	{ "s3c2440-ts", 0 },
 	{ "s3c64xx-ts", FEAT_PEN_IRQ },
diff --git a/drivers/input/touchscreen/stmpe-ts.c b/drivers/input/touchscreen/stmpe-ts.c
index e4c31256a..e414d43e5 100644
--- a/drivers/input/touchscreen/stmpe-ts.c
+++ b/drivers/input/touchscreen/stmpe-ts.c
@@ -267,27 +267,10 @@ static void stmpe_ts_close(struct input_dev *dev)
 static void stmpe_ts_get_platform_info(struct platform_device *pdev,
 					struct stmpe_touch *ts)
 {
-	struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
 	struct device_node *np = pdev->dev.of_node;
-	struct stmpe_ts_platform_data *ts_pdata = NULL;
-
-	ts->stmpe = stmpe;
-
-	if (stmpe->pdata && stmpe->pdata->ts) {
-		ts_pdata = stmpe->pdata->ts;
-
-		ts->sample_time = ts_pdata->sample_time;
-		ts->mod_12b = ts_pdata->mod_12b;
-		ts->ref_sel = ts_pdata->ref_sel;
-		ts->adc_freq = ts_pdata->adc_freq;
-		ts->ave_ctrl = ts_pdata->ave_ctrl;
-		ts->touch_det_delay = ts_pdata->touch_det_delay;
-		ts->settling = ts_pdata->settling;
-		ts->fraction_z = ts_pdata->fraction_z;
-		ts->i_drive = ts_pdata->i_drive;
-	} else if (np) {
-		u32 val;
+	u32 val;
 
+	if (np) {
 		if (!of_property_read_u32(np, "st,sample-time", &val))
 			ts->sample_time = val;
 		if (!of_property_read_u32(np, "st,mod-12b", &val))
@@ -311,6 +294,7 @@ static void stmpe_ts_get_platform_info(struct platform_device *pdev,
 
 static int stmpe_input_probe(struct platform_device *pdev)
 {
+	struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
 	struct stmpe_touch *ts;
 	struct input_dev *idev;
 	int error;
@@ -329,6 +313,7 @@ static int stmpe_input_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	platform_set_drvdata(pdev, ts);
+	ts->stmpe = stmpe;
 	ts->idev = idev;
 	ts->dev = &pdev->dev;
 
@@ -351,14 +336,13 @@ static int stmpe_input_probe(struct platform_device *pdev)
 	idev->name = STMPE_TS_NAME;
 	idev->phys = STMPE_TS_NAME"/input0";
 	idev->id.bustype = BUS_I2C;
-	idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
-	idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
 
 	idev->open = stmpe_ts_open;
 	idev->close = stmpe_ts_close;
 
 	input_set_drvdata(idev, ts);
 
+	input_set_capability(idev, EV_KEY, BTN_TOUCH);
 	input_set_abs_params(idev, ABS_X, 0, XY_MASK, 0, 0);
 	input_set_abs_params(idev, ABS_Y, 0, XY_MASK, 0, 0);
 	input_set_abs_params(idev, ABS_PRESSURE, 0x0, 0xff, 0, 0);
@@ -383,14 +367,19 @@ static int stmpe_ts_remove(struct platform_device *pdev)
 
 static struct platform_driver stmpe_ts_driver = {
 	.driver = {
-		   .name = STMPE_TS_NAME,
-		   },
+		.name = STMPE_TS_NAME,
+	},
 	.probe = stmpe_input_probe,
 	.remove = stmpe_ts_remove,
 };
 module_platform_driver(stmpe_ts_driver);
 
+static const struct of_device_id stmpe_ts_ids[] = {
+	{ .compatible = "st,stmpe-ts", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, stmpe_ts_ids);
+
 MODULE_AUTHOR("Luotao Fu <l.fu@pengutronix.de>");
 MODULE_DESCRIPTION("STMPEXXX touchscreen driver");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:" STMPE_TS_NAME);
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index a24eba5ea..8be7b9b79 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -125,7 +125,7 @@ struct sur40_image_header {
 #define VIDEO_PACKET_SIZE  16384
 
 /* polling interval (ms) */
-#define POLL_INTERVAL 10
+#define POLL_INTERVAL 4
 
 /* maximum number of contacts FIXME: this is a guess? */
 #define MAX_CONTACTS 64
@@ -342,7 +342,7 @@ static void sur40_poll(struct input_polled_dev *polldev)
 		 * instead of at the end.
 		 */
 		if (packet_id != header->packet_id)
-			dev_warn(sur40->dev, "packet ID mismatch\n");
+			dev_dbg(sur40->dev, "packet ID mismatch\n");
 
 		packet_blobs = result / sizeof(struct sur40_blob);
 		dev_dbg(sur40->dev, "received %d blobs\n", packet_blobs);
@@ -389,6 +389,8 @@ static void sur40_process_video(struct sur40_state *sur40)
 	list_del(&new_buf->list);
 	spin_unlock(&sur40->qlock);
 
+	dev_dbg(sur40->dev, "buffer acquired\n");
+
 	/* retrieve data via bulk read */
 	result = usb_bulk_msg(sur40->usbdev,
 			usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT),
@@ -416,6 +418,8 @@ static void sur40_process_video(struct sur40_state *sur40)
 		goto err_poll;
 	}
 
+	dev_dbg(sur40->dev, "header acquired\n");
+
 	sgt = vb2_dma_sg_plane_desc(&new_buf->vb, 0);
 
 	result = usb_sg_init(&sgr, sur40->usbdev,
@@ -432,11 +436,18 @@ static void sur40_process_video(struct sur40_state *sur40)
 		goto err_poll;
 	}
 
+	dev_dbg(sur40->dev, "image acquired\n");
+
+	/* return error if streaming was stopped in the meantime */
+	if (sur40->sequence == -1)
+		goto err_poll;
+
 	/* mark as finished */
 	v4l2_get_timestamp(&new_buf->vb.v4l2_buf.timestamp);
 	new_buf->vb.v4l2_buf.sequence = sur40->sequence++;
 	new_buf->vb.v4l2_buf.field = V4L2_FIELD_NONE;
 	vb2_buffer_done(&new_buf->vb, VB2_BUF_STATE_DONE);
+	dev_dbg(sur40->dev, "buffer marked done\n");
 	return;
 
 err_poll:
@@ -716,6 +727,7 @@ static int sur40_start_streaming(struct vb2_queue *vq, unsigned int count)
 static void sur40_stop_streaming(struct vb2_queue *vq)
 {
 	struct sur40_state *sur40 = vb2_get_drv_priv(vq);
+	sur40->sequence = -1;
 
 	/* Release all active buffers */
 	return_all_buffers(sur40, VB2_BUF_STATE_ERROR);
@@ -778,6 +790,33 @@ static int sur40_vidioc_enum_fmt(struct file *file, void *priv,
 	return 0;
 }
 
+static int sur40_vidioc_enum_framesizes(struct file *file, void *priv,
+					struct v4l2_frmsizeenum *f)
+{
+	if ((f->index != 0) || (f->pixel_format != V4L2_PIX_FMT_GREY))
+		return -EINVAL;
+
+	f->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+	f->discrete.width  = sur40_video_format.width;
+	f->discrete.height = sur40_video_format.height;
+	return 0;
+}
+
+static int sur40_vidioc_enum_frameintervals(struct file *file, void *priv,
+					    struct v4l2_frmivalenum *f)
+{
+	if ((f->index > 1) || (f->pixel_format != V4L2_PIX_FMT_GREY)
+		|| (f->width  != sur40_video_format.width)
+		|| (f->height != sur40_video_format.height))
+			return -EINVAL;
+
+	f->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+	f->discrete.denominator  = 60/(f->index+1);
+	f->discrete.numerator = 1;
+	return 0;
+}
+
+
 static const struct usb_device_id sur40_table[] = {
 	{ USB_DEVICE(ID_MICROSOFT, ID_SUR40) },  /* Samsung SUR40 */
 	{ }                                      /* terminating null entry */
@@ -829,6 +868,9 @@ static const struct v4l2_ioctl_ops sur40_video_ioctl_ops = {
 	.vidioc_s_fmt_vid_cap	= sur40_vidioc_fmt,
 	.vidioc_g_fmt_vid_cap	= sur40_vidioc_fmt,
 
+	.vidioc_enum_framesizes = sur40_vidioc_enum_framesizes,
+	.vidioc_enum_frameintervals = sur40_vidioc_enum_frameintervals,
+
 	.vidioc_enum_input	= sur40_vidioc_enum_input,
 	.vidioc_g_input		= sur40_vidioc_g_input,
 	.vidioc_s_input		= sur40_vidioc_s_input,
diff --git a/drivers/input/touchscreen/tsc2005.c b/drivers/input/touchscreen/tsc2005.c
index 72657c579..d8c025b0f 100644
--- a/drivers/input/touchscreen/tsc2005.c
+++ b/drivers/input/touchscreen/tsc2005.c
@@ -709,7 +709,7 @@ static int tsc2005_probe(struct spi_device *spi)
 	input_set_abs_params(input_dev, ABS_PRESSURE, 0, max_p, fudge_p, 0);
 
 	if (np)
-		touchscreen_parse_of_params(input_dev);
+		touchscreen_parse_of_params(input_dev, false);
 
 	input_dev->open = tsc2005_open;
 	input_dev->close = tsc2005_close;
diff --git a/drivers/input/touchscreen/wdt87xx_i2c.c b/drivers/input/touchscreen/wdt87xx_i2c.c
new file mode 100644
index 000000000..3ee535026
--- /dev/null
+++ b/drivers/input/touchscreen/wdt87xx_i2c.c
@@ -0,0 +1,1149 @@
+/*
+ * Weida HiTech WDT87xx TouchScreen I2C driver
+ *
+ * Copyright (c) 2015  Weida Hi-Tech Co., Ltd.
+ * HN Chen <hn.chen@weidahitech.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ */
+
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/firmware.h>
+#include <linux/input/mt.h>
+#include <linux/acpi.h>
+#include <asm/unaligned.h>
+
+#define WDT87XX_NAME		"wdt87xx_i2c"
+#define WDT87XX_DRV_VER		"0.9.6"
+#define WDT87XX_FW_NAME		"/*(DEBLOBBED)*/"
+#define WDT87XX_CFG_NAME	"/*(DEBLOBBED)*/"
+
+#define MODE_ACTIVE			0x01
+#define MODE_READY			0x02
+#define MODE_IDLE			0x03
+#define MODE_SLEEP			0x04
+#define MODE_STOP			0xFF
+
+#define WDT_MAX_FINGER			10
+#define WDT_RAW_BUF_COUNT		54
+#define WDT_V1_RAW_BUF_COUNT		74
+#define WDT_FIRMWARE_ID			0xa9e368f5
+
+#define PG_SIZE				0x1000
+#define MAX_RETRIES			3
+
+#define MAX_UNIT_AXIS			0x7FFF
+
+#define PKT_READ_SIZE			72
+#define PKT_WRITE_SIZE			80
+
+/* the finger definition of the report event */
+#define FINGER_EV_OFFSET_ID		0
+#define FINGER_EV_OFFSET_X		1
+#define FINGER_EV_OFFSET_Y		3
+#define FINGER_EV_SIZE			5
+
+#define FINGER_EV_V1_OFFSET_ID		0
+#define FINGER_EV_V1_OFFSET_W		1
+#define FINGER_EV_V1_OFFSET_P		2
+#define FINGER_EV_V1_OFFSET_X		3
+#define FINGER_EV_V1_OFFSET_Y		5
+#define FINGER_EV_V1_SIZE		7
+
+/* The definition of a report packet */
+#define TOUCH_PK_OFFSET_REPORT_ID	0
+#define TOUCH_PK_OFFSET_EVENT		1
+#define TOUCH_PK_OFFSET_SCAN_TIME	51
+#define TOUCH_PK_OFFSET_FNGR_NUM	53
+
+#define TOUCH_PK_V1_OFFSET_REPORT_ID	0
+#define TOUCH_PK_V1_OFFSET_EVENT	1
+#define TOUCH_PK_V1_OFFSET_SCAN_TIME	71
+#define TOUCH_PK_V1_OFFSET_FNGR_NUM	73
+
+/* The definition of the controller parameters */
+#define CTL_PARAM_OFFSET_FW_ID		0
+#define CTL_PARAM_OFFSET_PLAT_ID	2
+#define CTL_PARAM_OFFSET_XMLS_ID1	4
+#define CTL_PARAM_OFFSET_XMLS_ID2	6
+#define CTL_PARAM_OFFSET_PHY_CH_X	8
+#define CTL_PARAM_OFFSET_PHY_CH_Y	10
+#define CTL_PARAM_OFFSET_PHY_X0		12
+#define CTL_PARAM_OFFSET_PHY_X1		14
+#define CTL_PARAM_OFFSET_PHY_Y0		16
+#define CTL_PARAM_OFFSET_PHY_Y1		18
+#define CTL_PARAM_OFFSET_PHY_W		22
+#define CTL_PARAM_OFFSET_PHY_H		24
+#define CTL_PARAM_OFFSET_FACTOR		32
+
+/* Communication commands */
+#define PACKET_SIZE			56
+#define VND_REQ_READ			0x06
+#define VND_READ_DATA			0x07
+#define VND_REQ_WRITE			0x08
+
+#define VND_CMD_START			0x00
+#define VND_CMD_STOP			0x01
+#define VND_CMD_RESET			0x09
+
+#define VND_CMD_ERASE			0x1A
+
+#define VND_GET_CHECKSUM		0x66
+
+#define VND_SET_DATA			0x83
+#define VND_SET_COMMAND_DATA		0x84
+#define VND_SET_CHECKSUM_CALC		0x86
+#define VND_SET_CHECKSUM_LENGTH		0x87
+
+#define VND_CMD_SFLCK			0xFC
+#define VND_CMD_SFUNL			0xFD
+
+#define CMD_SFLCK_KEY			0xC39B
+#define CMD_SFUNL_KEY			0x95DA
+
+#define STRIDX_PLATFORM_ID		0x80
+#define STRIDX_PARAMETERS		0x81
+
+#define CMD_BUF_SIZE			8
+#define PKT_BUF_SIZE			64
+
+/* The definition of the command packet */
+#define CMD_REPORT_ID_OFFSET		0x0
+#define CMD_TYPE_OFFSET			0x1
+#define CMD_INDEX_OFFSET		0x2
+#define CMD_KEY_OFFSET			0x3
+#define CMD_LENGTH_OFFSET		0x4
+#define CMD_DATA_OFFSET			0x8
+
+/* The definition of firmware chunk tags */
+#define FOURCC_ID_RIFF			0x46464952
+#define FOURCC_ID_WHIF			0x46494857
+#define FOURCC_ID_FRMT			0x544D5246
+#define FOURCC_ID_FRWR			0x52575246
+#define FOURCC_ID_CNFG			0x47464E43
+
+#define CHUNK_ID_FRMT			FOURCC_ID_FRMT
+#define CHUNK_ID_FRWR			FOURCC_ID_FRWR
+#define CHUNK_ID_CNFG			FOURCC_ID_CNFG
+
+#define FW_FOURCC1_OFFSET		0
+#define FW_SIZE_OFFSET			4
+#define FW_FOURCC2_OFFSET		8
+#define FW_PAYLOAD_OFFSET		40
+
+#define FW_CHUNK_ID_OFFSET		0
+#define FW_CHUNK_SIZE_OFFSET		4
+#define FW_CHUNK_TGT_START_OFFSET	8
+#define FW_CHUNK_PAYLOAD_LEN_OFFSET	12
+#define FW_CHUNK_SRC_START_OFFSET	16
+#define FW_CHUNK_VERSION_OFFSET		20
+#define FW_CHUNK_ATTR_OFFSET		24
+#define FW_CHUNK_PAYLOAD_OFFSET		32
+
+/* Controller requires minimum 300us between commands */
+#define WDT_COMMAND_DELAY_MS		2
+#define WDT_FLASH_WRITE_DELAY_MS	4
+
+struct wdt87xx_sys_param {
+	u16	fw_id;
+	u16	plat_id;
+	u16	xmls_id1;
+	u16	xmls_id2;
+	u16	phy_ch_x;
+	u16	phy_ch_y;
+	u16	phy_w;
+	u16	phy_h;
+	u16	scaling_factor;
+	u32	max_x;
+	u32	max_y;
+};
+
+struct wdt87xx_data {
+	struct i2c_client		*client;
+	struct input_dev		*input;
+	/* Mutex for fw update to prevent concurrent access */
+	struct mutex			fw_mutex;
+	struct wdt87xx_sys_param	param;
+	u8				phys[32];
+};
+
+static int wdt87xx_i2c_xfer(struct i2c_client *client,
+			    void *txdata, size_t txlen,
+			    void *rxdata, size_t rxlen)
+{
+	struct i2c_msg msgs[] = {
+		{
+			.addr	= client->addr,
+			.flags	= 0,
+			.len	= txlen,
+			.buf	= txdata,
+		},
+		{
+			.addr	= client->addr,
+			.flags	= I2C_M_RD,
+			.len	= rxlen,
+			.buf	= rxdata,
+		},
+	};
+	int error;
+	int ret;
+
+	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+	if (ret != ARRAY_SIZE(msgs)) {
+		error = ret < 0 ? ret : -EIO;
+		dev_err(&client->dev, "%s: i2c transfer failed: %d\n",
+			__func__, error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int wdt87xx_get_string(struct i2c_client *client, u8 str_idx,
+			      u8 *buf, size_t len)
+{
+	u8 tx_buf[] = { 0x22, 0x00, 0x13, 0x0E, str_idx, 0x23, 0x00 };
+	u8 rx_buf[PKT_WRITE_SIZE];
+	size_t rx_len = len + 2;
+	int error;
+
+	if (rx_len > sizeof(rx_buf))
+		return -EINVAL;
+
+	error = wdt87xx_i2c_xfer(client, tx_buf, sizeof(tx_buf),
+				 rx_buf, rx_len);
+	if (error) {
+		dev_err(&client->dev, "get string failed: %d\n", error);
+		return error;
+	}
+
+	if (rx_buf[1] != 0x03) {
+		dev_err(&client->dev, "unexpected response to get string: %d\n",
+			rx_buf[1]);
+		return -EINVAL;
+	}
+
+	rx_len = min_t(size_t, len, rx_buf[0]);
+	memcpy(buf, &rx_buf[2], rx_len);
+
+	mdelay(WDT_COMMAND_DELAY_MS);
+
+	return 0;
+}
+
+static int wdt87xx_get_feature(struct i2c_client *client,
+			       u8 *buf, size_t buf_size)
+{
+	u8 tx_buf[8];
+	u8 rx_buf[PKT_WRITE_SIZE];
+	size_t tx_len = 0;
+	size_t rx_len = buf_size + 2;
+	int error;
+
+	if (rx_len > sizeof(rx_buf))
+		return -EINVAL;
+
+	/* Get feature command packet */
+	tx_buf[tx_len++] = 0x22;
+	tx_buf[tx_len++] = 0x00;
+	if (buf[CMD_REPORT_ID_OFFSET] > 0xF) {
+		tx_buf[tx_len++] = 0x30;
+		tx_buf[tx_len++] = 0x02;
+		tx_buf[tx_len++] = buf[CMD_REPORT_ID_OFFSET];
+	} else {
+		tx_buf[tx_len++] = 0x30 | buf[CMD_REPORT_ID_OFFSET];
+		tx_buf[tx_len++] = 0x02;
+	}
+	tx_buf[tx_len++] = 0x23;
+	tx_buf[tx_len++] = 0x00;
+
+	error = wdt87xx_i2c_xfer(client, tx_buf, tx_len, rx_buf, rx_len);
+	if (error) {
+		dev_err(&client->dev, "get feature failed: %d\n", error);
+		return error;
+	}
+
+	rx_len = min_t(size_t, buf_size, get_unaligned_le16(rx_buf));
+	memcpy(buf, &rx_buf[2], rx_len);
+
+	mdelay(WDT_COMMAND_DELAY_MS);
+
+	return 0;
+}
+
+static int wdt87xx_set_feature(struct i2c_client *client,
+			       const u8 *buf, size_t buf_size)
+{
+	u8 tx_buf[PKT_WRITE_SIZE];
+	int tx_len = 0;
+	int error;
+
+	/* Set feature command packet */
+	tx_buf[tx_len++] = 0x22;
+	tx_buf[tx_len++] = 0x00;
+	if (buf[CMD_REPORT_ID_OFFSET] > 0xF) {
+		tx_buf[tx_len++] = 0x30;
+		tx_buf[tx_len++] = 0x03;
+		tx_buf[tx_len++] = buf[CMD_REPORT_ID_OFFSET];
+	} else {
+		tx_buf[tx_len++] = 0x30 | buf[CMD_REPORT_ID_OFFSET];
+		tx_buf[tx_len++] = 0x03;
+	}
+	tx_buf[tx_len++] = 0x23;
+	tx_buf[tx_len++] = 0x00;
+	tx_buf[tx_len++] = (buf_size & 0xFF);
+	tx_buf[tx_len++] = ((buf_size & 0xFF00) >> 8);
+
+	if (tx_len + buf_size > sizeof(tx_buf))
+		return -EINVAL;
+
+	memcpy(&tx_buf[tx_len], buf, buf_size);
+	tx_len += buf_size;
+
+	error = i2c_master_send(client, tx_buf, tx_len);
+	if (error < 0) {
+		dev_err(&client->dev, "set feature failed: %d\n", error);
+		return error;
+	}
+
+	mdelay(WDT_COMMAND_DELAY_MS);
+
+	return 0;
+}
+
+static int wdt87xx_send_command(struct i2c_client *client, int cmd, int value)
+{
+	u8 cmd_buf[CMD_BUF_SIZE];
+
+	/* Set the command packet */
+	cmd_buf[CMD_REPORT_ID_OFFSET] = VND_REQ_WRITE;
+	cmd_buf[CMD_TYPE_OFFSET] = VND_SET_COMMAND_DATA;
+	put_unaligned_le16((u16)cmd, &cmd_buf[CMD_INDEX_OFFSET]);
+
+	switch (cmd) {
+	case VND_CMD_START:
+	case VND_CMD_STOP:
+	case VND_CMD_RESET:
+		/* Mode selector */
+		put_unaligned_le32((value & 0xFF), &cmd_buf[CMD_LENGTH_OFFSET]);
+		break;
+
+	case VND_CMD_SFLCK:
+		put_unaligned_le16(CMD_SFLCK_KEY, &cmd_buf[CMD_KEY_OFFSET]);
+		break;
+
+	case VND_CMD_SFUNL:
+		put_unaligned_le16(CMD_SFUNL_KEY, &cmd_buf[CMD_KEY_OFFSET]);
+		break;
+
+	case VND_CMD_ERASE:
+	case VND_SET_CHECKSUM_CALC:
+	case VND_SET_CHECKSUM_LENGTH:
+		put_unaligned_le32(value, &cmd_buf[CMD_KEY_OFFSET]);
+		break;
+
+	default:
+		cmd_buf[CMD_REPORT_ID_OFFSET] = 0;
+		dev_err(&client->dev, "Invalid command: %d\n", cmd);
+		return -EINVAL;
+	}
+
+	return wdt87xx_set_feature(client, cmd_buf, sizeof(cmd_buf));
+}
+
+static int wdt87xx_sw_reset(struct i2c_client *client)
+{
+	int error;
+
+	dev_dbg(&client->dev, "resetting device now\n");
+
+	error = wdt87xx_send_command(client, VND_CMD_RESET, 0);
+	if (error) {
+		dev_err(&client->dev, "reset failed\n");
+		return error;
+	}
+
+	/* Wait the device to be ready */
+	msleep(200);
+
+	return 0;
+}
+
+static const void *wdt87xx_get_fw_chunk(const struct firmware *fw, u32 id)
+{
+	size_t pos = FW_PAYLOAD_OFFSET;
+	u32 chunk_id, chunk_size;
+
+	while (pos < fw->size) {
+		chunk_id = get_unaligned_le32(fw->data +
+					      pos + FW_CHUNK_ID_OFFSET);
+		if (chunk_id == id)
+			return fw->data + pos;
+
+		chunk_size = get_unaligned_le32(fw->data +
+						pos + FW_CHUNK_SIZE_OFFSET);
+		pos += chunk_size + 2 * sizeof(u32); /* chunk ID + size */
+	}
+
+	return NULL;
+}
+
+static int wdt87xx_get_sysparam(struct i2c_client *client,
+				struct wdt87xx_sys_param *param)
+{
+	u8 buf[PKT_READ_SIZE];
+	int error;
+
+	error = wdt87xx_get_string(client, STRIDX_PARAMETERS, buf, 34);
+	if (error) {
+		dev_err(&client->dev, "failed to get parameters\n");
+		return error;
+	}
+
+	param->xmls_id1 = get_unaligned_le16(buf + CTL_PARAM_OFFSET_XMLS_ID1);
+	param->xmls_id2 = get_unaligned_le16(buf + CTL_PARAM_OFFSET_XMLS_ID2);
+	param->phy_ch_x = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_CH_X);
+	param->phy_ch_y = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_CH_Y);
+	param->phy_w = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_W) / 10;
+	param->phy_h = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_H) / 10;
+
+	/* Get the scaling factor of pixel to logical coordinate */
+	param->scaling_factor =
+			get_unaligned_le16(buf + CTL_PARAM_OFFSET_FACTOR);
+
+	param->max_x = MAX_UNIT_AXIS;
+	param->max_y = DIV_ROUND_CLOSEST(MAX_UNIT_AXIS * param->phy_h,
+					 param->phy_w);
+
+	error = wdt87xx_get_string(client, STRIDX_PLATFORM_ID, buf, 8);
+	if (error) {
+		dev_err(&client->dev, "failed to get platform id\n");
+		return error;
+	}
+
+	param->plat_id = buf[1];
+
+	buf[0] = 0xf2;
+	error = wdt87xx_get_feature(client, buf, 16);
+	if (error) {
+		dev_err(&client->dev, "failed to get firmware id\n");
+		return error;
+	}
+
+	if (buf[0] != 0xf2) {
+		dev_err(&client->dev, "wrong id of fw response: 0x%x\n",
+			buf[0]);
+		return -EINVAL;
+	}
+
+	param->fw_id = get_unaligned_le16(&buf[1]);
+
+	dev_info(&client->dev,
+		 "fw_id: 0x%x, plat_id: 0x%x, xml_id1: %04x, xml_id2: %04x\n",
+		 param->fw_id, param->plat_id,
+		 param->xmls_id1, param->xmls_id2);
+
+	return 0;
+}
+
+static int wdt87xx_validate_firmware(struct wdt87xx_data *wdt,
+				     const struct firmware *fw)
+{
+	const void *fw_chunk;
+	u32 data1, data2;
+	u32 size;
+	u8 fw_chip_id;
+	u8 chip_id;
+
+	data1 = get_unaligned_le32(fw->data + FW_FOURCC1_OFFSET);
+	data2 = get_unaligned_le32(fw->data + FW_FOURCC2_OFFSET);
+	if (data1 != FOURCC_ID_RIFF || data2 != FOURCC_ID_WHIF) {
+		dev_err(&wdt->client->dev, "check fw tag failed\n");
+		return -EINVAL;
+	}
+
+	size = get_unaligned_le32(fw->data + FW_SIZE_OFFSET);
+	if (size != fw->size) {
+		dev_err(&wdt->client->dev,
+			"fw size mismatch: expected %d, actual %zu\n",
+			size, fw->size);
+		return -EINVAL;
+	}
+
+	/*
+	 * Get the chip_id from the firmware. Make sure that it is the
+	 * right controller to do the firmware and config update.
+	 */
+	fw_chunk = wdt87xx_get_fw_chunk(fw, CHUNK_ID_FRWR);
+	if (!fw_chunk) {
+		dev_err(&wdt->client->dev,
+			"unable to locate firmware chunk\n");
+		return -EINVAL;
+	}
+
+	fw_chip_id = (get_unaligned_le32(fw_chunk +
+					 FW_CHUNK_VERSION_OFFSET) >> 12) & 0xF;
+	chip_id = (wdt->param.fw_id >> 12) & 0xF;
+
+	if (fw_chip_id != chip_id) {
+		dev_err(&wdt->client->dev,
+			"fw version mismatch: fw %d vs. chip %d\n",
+			fw_chip_id, chip_id);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int wdt87xx_validate_fw_chunk(const void *data, int id)
+{
+	if (id == CHUNK_ID_FRWR) {
+		u32 fw_id;
+
+		fw_id = get_unaligned_le32(data + FW_CHUNK_PAYLOAD_OFFSET);
+		if (fw_id != WDT_FIRMWARE_ID)
+			return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int wdt87xx_write_data(struct i2c_client *client, const char *data,
+			      u32 address, int length)
+{
+	u16 packet_size;
+	int count = 0;
+	int error;
+	u8 pkt_buf[PKT_BUF_SIZE];
+
+	/* Address and length should be 4 bytes aligned */
+	if ((address & 0x3) != 0 || (length & 0x3) != 0) {
+		dev_err(&client->dev,
+			"addr & len must be 4 bytes aligned %x, %x\n",
+			address, length);
+		return -EINVAL;
+	}
+
+	while (length) {
+		packet_size = min(length, PACKET_SIZE);
+
+		pkt_buf[CMD_REPORT_ID_OFFSET] = VND_REQ_WRITE;
+		pkt_buf[CMD_TYPE_OFFSET] = VND_SET_DATA;
+		put_unaligned_le16(packet_size, &pkt_buf[CMD_INDEX_OFFSET]);
+		put_unaligned_le32(address, &pkt_buf[CMD_LENGTH_OFFSET]);
+		memcpy(&pkt_buf[CMD_DATA_OFFSET], data, packet_size);
+
+		error = wdt87xx_set_feature(client, pkt_buf, sizeof(pkt_buf));
+		if (error)
+			return error;
+
+		length -= packet_size;
+		data += packet_size;
+		address += packet_size;
+
+		/* Wait for the controller to finish the write */
+		mdelay(WDT_FLASH_WRITE_DELAY_MS);
+
+		if ((++count % 32) == 0) {
+			/* Delay for fw to clear watch dog */
+			msleep(20);
+		}
+	}
+
+	return 0;
+}
+
+static u16 misr(u16 cur_value, u8 new_value)
+{
+	u32 a, b;
+	u32 bit0;
+	u32 y;
+
+	a = cur_value;
+	b = new_value;
+	bit0 = a ^ (b & 1);
+	bit0 ^= a >> 1;
+	bit0 ^= a >> 2;
+	bit0 ^= a >> 4;
+	bit0 ^= a >> 5;
+	bit0 ^= a >> 7;
+	bit0 ^= a >> 11;
+	bit0 ^= a >> 15;
+	y = (a << 1) ^ b;
+	y = (y & ~1) | (bit0 & 1);
+
+	return (u16)y;
+}
+
+static u16 wdt87xx_calculate_checksum(const u8 *data, size_t length)
+{
+	u16 checksum = 0;
+	size_t i;
+
+	for (i = 0; i < length; i++)
+		checksum = misr(checksum, data[i]);
+
+	return checksum;
+}
+
+static int wdt87xx_get_checksum(struct i2c_client *client, u16 *checksum,
+				u32 address, int length)
+{
+	int error;
+	int time_delay;
+	u8 pkt_buf[PKT_BUF_SIZE];
+	u8 cmd_buf[CMD_BUF_SIZE];
+
+	error = wdt87xx_send_command(client, VND_SET_CHECKSUM_LENGTH, length);
+	if (error) {
+		dev_err(&client->dev, "failed to set checksum length\n");
+		return error;
+	}
+
+	error = wdt87xx_send_command(client, VND_SET_CHECKSUM_CALC, address);
+	if (error) {
+		dev_err(&client->dev, "failed to set checksum address\n");
+		return error;
+	}
+
+	/* Wait the operation to complete */
+	time_delay = DIV_ROUND_UP(length, 1024);
+	msleep(time_delay * 30);
+
+	memset(cmd_buf, 0, sizeof(cmd_buf));
+	cmd_buf[CMD_REPORT_ID_OFFSET] = VND_REQ_READ;
+	cmd_buf[CMD_TYPE_OFFSET] = VND_GET_CHECKSUM;
+	error = wdt87xx_set_feature(client, cmd_buf, sizeof(cmd_buf));
+	if (error) {
+		dev_err(&client->dev, "failed to request checksum\n");
+		return error;
+	}
+
+	memset(pkt_buf, 0, sizeof(pkt_buf));
+	pkt_buf[CMD_REPORT_ID_OFFSET] = VND_READ_DATA;
+	error = wdt87xx_get_feature(client, pkt_buf, sizeof(pkt_buf));
+	if (error) {
+		dev_err(&client->dev, "failed to read checksum\n");
+		return error;
+	}
+
+	*checksum = get_unaligned_le16(&pkt_buf[CMD_DATA_OFFSET]);
+	return 0;
+}
+
+static int wdt87xx_write_firmware(struct i2c_client *client, const void *chunk)
+{
+	u32 start_addr = get_unaligned_le32(chunk + FW_CHUNK_TGT_START_OFFSET);
+	u32 size = get_unaligned_le32(chunk + FW_CHUNK_PAYLOAD_LEN_OFFSET);
+	const void *data = chunk + FW_CHUNK_PAYLOAD_OFFSET;
+	int error;
+	int err1;
+	int page_size;
+	int retry = 0;
+	u16 device_checksum, firmware_checksum;
+
+	dev_dbg(&client->dev, "start 4k page program\n");
+
+	error = wdt87xx_send_command(client, VND_CMD_STOP, MODE_STOP);
+	if (error) {
+		dev_err(&client->dev, "stop report mode failed\n");
+		return error;
+	}
+
+	error = wdt87xx_send_command(client, VND_CMD_SFUNL, 0);
+	if (error) {
+		dev_err(&client->dev, "unlock failed\n");
+		goto out_enable_reporting;
+	}
+
+	mdelay(10);
+
+	while (size) {
+		dev_dbg(&client->dev, "%s: %x, %x\n", __func__,
+			start_addr, size);
+
+		page_size = min_t(u32, size, PG_SIZE);
+		size -= page_size;
+
+		for (retry = 0; retry < MAX_RETRIES; retry++) {
+			error = wdt87xx_send_command(client, VND_CMD_ERASE,
+						     start_addr);
+			if (error) {
+				dev_err(&client->dev,
+					"erase failed at %#08x\n", start_addr);
+				break;
+			}
+
+			msleep(50);
+
+			error = wdt87xx_write_data(client, data, start_addr,
+						   page_size);
+			if (error) {
+				dev_err(&client->dev,
+					"write failed at %#08x (%d bytes)\n",
+					start_addr, page_size);
+				break;
+			}
+
+			error = wdt87xx_get_checksum(client, &device_checksum,
+						     start_addr, page_size);
+			if (error) {
+				dev_err(&client->dev,
+					"failed to retrieve checksum for %#08x (len: %d)\n",
+					start_addr, page_size);
+				break;
+			}
+
+			firmware_checksum =
+				wdt87xx_calculate_checksum(data, page_size);
+
+			if (device_checksum == firmware_checksum)
+				break;
+
+			dev_err(&client->dev,
+				"checksum fail: %d vs %d, retry %d\n",
+				device_checksum, firmware_checksum, retry);
+		}
+
+		if (retry == MAX_RETRIES) {
+			dev_err(&client->dev, "page write failed\n");
+			error = -EIO;
+			goto out_lock_device;
+		}
+
+		start_addr = start_addr + page_size;
+		data = data + page_size;
+	}
+
+out_lock_device:
+	err1 = wdt87xx_send_command(client, VND_CMD_SFLCK, 0);
+	if (err1)
+		dev_err(&client->dev, "lock failed\n");
+
+	mdelay(10);
+
+out_enable_reporting:
+	err1 = wdt87xx_send_command(client, VND_CMD_START, 0);
+	if (err1)
+		dev_err(&client->dev, "start to report failed\n");
+
+	return error ? error : err1;
+}
+
+static int wdt87xx_load_chunk(struct i2c_client *client,
+			      const struct firmware *fw, u32 ck_id)
+{
+	const void *chunk;
+	int error;
+
+	chunk = wdt87xx_get_fw_chunk(fw, ck_id);
+	if (!chunk) {
+		dev_err(&client->dev, "unable to locate chunk (type %d)\n",
+			ck_id);
+		return -EINVAL;
+	}
+
+	error = wdt87xx_validate_fw_chunk(chunk, ck_id);
+	if (error) {
+		dev_err(&client->dev, "invalid chunk (type %d): %d\n",
+			ck_id, error);
+		return error;
+	}
+
+	error = wdt87xx_write_firmware(client, chunk);
+	if (error) {
+		dev_err(&client->dev,
+			"failed to write fw chunk (type %d): %d\n",
+			ck_id, error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int wdt87xx_do_update_firmware(struct i2c_client *client,
+				      const struct firmware *fw,
+				      unsigned int chunk_id)
+{
+	struct wdt87xx_data *wdt = i2c_get_clientdata(client);
+	int error;
+
+	error = wdt87xx_validate_firmware(wdt, fw);
+	if (error)
+		return error;
+
+	error = mutex_lock_interruptible(&wdt->fw_mutex);
+	if (error)
+		return error;
+
+	disable_irq(client->irq);
+
+	error = wdt87xx_load_chunk(client, fw, chunk_id);
+	if (error) {
+		dev_err(&client->dev,
+			"firmware load failed (type: %d): %d\n",
+			chunk_id, error);
+		goto out;
+	}
+
+	error = wdt87xx_sw_reset(client);
+	if (error) {
+		dev_err(&client->dev, "soft reset failed: %d\n", error);
+		goto out;
+	}
+
+	/* Refresh the parameters */
+	error = wdt87xx_get_sysparam(client, &wdt->param);
+	if (error)
+		dev_err(&client->dev,
+			"failed to refresh system paramaters: %d\n", error);
+out:
+	enable_irq(client->irq);
+	mutex_unlock(&wdt->fw_mutex);
+
+	return error ? error : 0;
+}
+
+static int wdt87xx_update_firmware(struct device *dev,
+				   const char *fw_name, unsigned int chunk_id)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	const struct firmware *fw;
+	int error;
+
+	error = reject_firmware(&fw, fw_name, dev);
+	if (error) {
+		dev_err(&client->dev, "unable to retrieve firmware %s: %d\n",
+			fw_name, error);
+		return error;
+	}
+
+	error = wdt87xx_do_update_firmware(client, fw, chunk_id);
+
+	release_firmware(fw);
+
+	return error ? error : 0;
+}
+
+static ssize_t config_csum_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct wdt87xx_data *wdt = i2c_get_clientdata(client);
+	u32 cfg_csum;
+
+	cfg_csum = wdt->param.xmls_id1;
+	cfg_csum = (cfg_csum << 16) | wdt->param.xmls_id2;
+
+	return scnprintf(buf, PAGE_SIZE, "%x\n", cfg_csum);
+}
+
+static ssize_t fw_version_show(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct wdt87xx_data *wdt = i2c_get_clientdata(client);
+
+	return scnprintf(buf, PAGE_SIZE, "%x\n", wdt->param.fw_id);
+}
+
+static ssize_t plat_id_show(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct wdt87xx_data *wdt = i2c_get_clientdata(client);
+
+	return scnprintf(buf, PAGE_SIZE, "%x\n", wdt->param.plat_id);
+}
+
+static ssize_t update_config_store(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t count)
+{
+	int error;
+
+	error = wdt87xx_update_firmware(dev, WDT87XX_CFG_NAME, CHUNK_ID_CNFG);
+
+	return error ? error : count;
+}
+
+static ssize_t update_fw_store(struct device *dev,
+			       struct device_attribute *attr,
+			       const char *buf, size_t count)
+{
+	int error;
+
+	error = wdt87xx_update_firmware(dev, WDT87XX_FW_NAME, CHUNK_ID_FRWR);
+
+	return error ? error : count;
+}
+
+static DEVICE_ATTR_RO(config_csum);
+static DEVICE_ATTR_RO(fw_version);
+static DEVICE_ATTR_RO(plat_id);
+static DEVICE_ATTR_WO(update_config);
+static DEVICE_ATTR_WO(update_fw);
+
+static struct attribute *wdt87xx_attrs[] = {
+	&dev_attr_config_csum.attr,
+	&dev_attr_fw_version.attr,
+	&dev_attr_plat_id.attr,
+	&dev_attr_update_config.attr,
+	&dev_attr_update_fw.attr,
+	NULL
+};
+
+static const struct attribute_group wdt87xx_attr_group = {
+	.attrs = wdt87xx_attrs,
+};
+
+static void wdt87xx_report_contact(struct input_dev *input,
+				   struct wdt87xx_sys_param *param,
+				   u8 *buf)
+{
+	int finger_id;
+	u32 x, y, w;
+	u8 p;
+
+	finger_id = (buf[FINGER_EV_V1_OFFSET_ID] >> 3) - 1;
+	if (finger_id < 0)
+		return;
+
+	/* Check if this is an active contact */
+	if (!(buf[FINGER_EV_V1_OFFSET_ID] & 0x1))
+		return;
+
+	w = buf[FINGER_EV_V1_OFFSET_W];
+	w *= param->scaling_factor;
+
+	p = buf[FINGER_EV_V1_OFFSET_P];
+
+	x = get_unaligned_le16(buf + FINGER_EV_V1_OFFSET_X);
+
+	y = get_unaligned_le16(buf + FINGER_EV_V1_OFFSET_Y);
+	y = DIV_ROUND_CLOSEST(y * param->phy_h, param->phy_w);
+
+	/* Refuse incorrect coordinates */
+	if (x > param->max_x || y > param->max_y)
+		return;
+
+	dev_dbg(input->dev.parent, "tip on (%d), x(%d), y(%d)\n",
+		finger_id, x, y);
+
+	input_mt_slot(input, finger_id);
+	input_mt_report_slot_state(input, MT_TOOL_FINGER, 1);
+	input_report_abs(input, ABS_MT_TOUCH_MAJOR, w);
+	input_report_abs(input, ABS_MT_PRESSURE, p);
+	input_report_abs(input, ABS_MT_POSITION_X, x);
+	input_report_abs(input, ABS_MT_POSITION_Y, y);
+}
+
+static irqreturn_t wdt87xx_ts_interrupt(int irq, void *dev_id)
+{
+	struct wdt87xx_data *wdt = dev_id;
+	struct i2c_client *client = wdt->client;
+	int i, fingers;
+	int error;
+	u8 raw_buf[WDT_V1_RAW_BUF_COUNT] = {0};
+
+	error = i2c_master_recv(client, raw_buf, WDT_V1_RAW_BUF_COUNT);
+	if (error < 0) {
+		dev_err(&client->dev, "read v1 raw data failed: %d\n", error);
+		goto irq_exit;
+	}
+
+	fingers = raw_buf[TOUCH_PK_V1_OFFSET_FNGR_NUM];
+	if (!fingers)
+		goto irq_exit;
+
+	for (i = 0; i < WDT_MAX_FINGER; i++)
+		wdt87xx_report_contact(wdt->input,
+				       &wdt->param,
+				       &raw_buf[TOUCH_PK_V1_OFFSET_EVENT +
+						i * FINGER_EV_V1_SIZE]);
+
+	input_mt_sync_frame(wdt->input);
+	input_sync(wdt->input);
+
+irq_exit:
+	return IRQ_HANDLED;
+}
+
+static int wdt87xx_ts_create_input_device(struct wdt87xx_data *wdt)
+{
+	struct device *dev = &wdt->client->dev;
+	struct input_dev *input;
+	unsigned int res = DIV_ROUND_CLOSEST(MAX_UNIT_AXIS, wdt->param.phy_w);
+	int error;
+
+	input = devm_input_allocate_device(dev);
+	if (!input) {
+		dev_err(dev, "failed to allocate input device\n");
+		return -ENOMEM;
+	}
+	wdt->input = input;
+
+	input->name = "WDT87xx Touchscreen";
+	input->id.bustype = BUS_I2C;
+	input->phys = wdt->phys;
+
+	input_set_abs_params(input, ABS_MT_POSITION_X, 0,
+			     wdt->param.max_x, 0, 0);
+	input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
+			     wdt->param.max_y, 0, 0);
+	input_abs_set_res(input, ABS_MT_POSITION_X, res);
+	input_abs_set_res(input, ABS_MT_POSITION_Y, res);
+
+	input_set_abs_params(input, ABS_MT_TOUCH_MAJOR,
+			     0, wdt->param.max_x, 0, 0);
+	input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xFF, 0, 0);
+
+	input_mt_init_slots(input, WDT_MAX_FINGER,
+			    INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
+
+	error = input_register_device(input);
+	if (error) {
+		dev_err(dev, "failed to register input device: %d\n", error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int wdt87xx_ts_probe(struct i2c_client *client,
+			    const struct i2c_device_id *id)
+{
+	struct wdt87xx_data *wdt;
+	int error;
+
+	dev_dbg(&client->dev, "adapter=%d, client irq: %d\n",
+		client->adapter->nr, client->irq);
+
+	/* Check if the I2C function is ok in this adaptor */
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+		return -ENXIO;
+
+	wdt = devm_kzalloc(&client->dev, sizeof(*wdt), GFP_KERNEL);
+	if (!wdt)
+		return -ENOMEM;
+
+	wdt->client = client;
+	mutex_init(&wdt->fw_mutex);
+	i2c_set_clientdata(client, wdt);
+
+	snprintf(wdt->phys, sizeof(wdt->phys), "i2c-%u-%04x/input0",
+		 client->adapter->nr, client->addr);
+
+	error = wdt87xx_get_sysparam(client, &wdt->param);
+	if (error)
+		return error;
+
+	error = wdt87xx_ts_create_input_device(wdt);
+	if (error)
+		return error;
+
+	error = devm_request_threaded_irq(&client->dev, client->irq,
+					  NULL, wdt87xx_ts_interrupt,
+					  IRQF_ONESHOT,
+					  client->name, wdt);
+	if (error) {
+		dev_err(&client->dev, "request irq failed: %d\n", error);
+		return error;
+	}
+
+	error = sysfs_create_group(&client->dev.kobj, &wdt87xx_attr_group);
+	if (error) {
+		dev_err(&client->dev, "create sysfs failed: %d\n", error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int wdt87xx_ts_remove(struct i2c_client *client)
+{
+	sysfs_remove_group(&client->dev.kobj, &wdt87xx_attr_group);
+
+	return 0;
+}
+
+static int __maybe_unused wdt87xx_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	int error;
+
+	disable_irq(client->irq);
+
+	error = wdt87xx_send_command(client, VND_CMD_STOP, MODE_IDLE);
+	if (error) {
+		enable_irq(client->irq);
+		dev_err(&client->dev,
+			"failed to stop device when suspending: %d\n",
+			error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused wdt87xx_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	int error;
+
+	/*
+	 * The chip may have been reset while system is resuming,
+	 * give it some time to settle.
+	 */
+	mdelay(100);
+
+	error = wdt87xx_send_command(client, VND_CMD_START, 0);
+	if (error)
+		dev_err(&client->dev,
+			"failed to start device when resuming: %d\n",
+			error);
+
+	enable_irq(client->irq);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(wdt87xx_pm_ops, wdt87xx_suspend, wdt87xx_resume);
+
+static const struct i2c_device_id wdt87xx_dev_id[] = {
+	{ WDT87XX_NAME, 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, wdt87xx_dev_id);
+
+static const struct acpi_device_id wdt87xx_acpi_id[] = {
+	{ "WDHT0001", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, wdt87xx_acpi_id);
+
+static struct i2c_driver wdt87xx_driver = {
+	.probe		= wdt87xx_ts_probe,
+	.remove		= wdt87xx_ts_remove,
+	.id_table	= wdt87xx_dev_id,
+	.driver	= {
+		.name	= WDT87XX_NAME,
+		.pm     = &wdt87xx_pm_ops,
+		.acpi_match_table = ACPI_PTR(wdt87xx_acpi_id),
+	},
+};
+module_i2c_driver(wdt87xx_driver);
+
+MODULE_AUTHOR("HN Chen <hn.chen@weidahitech.com>");
+MODULE_DESCRIPTION("WeidaHiTech WDT87XX Touchscreen driver");
+MODULE_VERSION(WDT87XX_DRV_VER);
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/zforce_ts.c b/drivers/input/touchscreen/zforce_ts.c
index 19880c738..f58a19652 100644
--- a/drivers/input/touchscreen/zforce_ts.c
+++ b/drivers/input/touchscreen/zforce_ts.c
@@ -30,7 +30,6 @@
 #include <linux/input/mt.h>
 #include <linux/platform_data/zforce_ts.h>
 #include <linux/regulator/consumer.h>
-#include <linux/delay.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>