Input: add a driver for wdt87xx touchscreen controller

This is a driver for Weida HiTech WDT87xx series touchscreen controller.
Signed-off-by: HungNien Chen <hn.chen@weidahitech.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

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

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