Input: add driver for Cypress APA I2C Trackpad

This patch introduces a driver for Cypress All Points Addressable
I2C Trackpad, including the ones in 2012 Samsung Chromebooks.

This device is compatible with MT protocol type B, providing identifiable
contacts.
Signed-off-by: Dudley Du <dudl@cypress.com>
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/mouse/Kconfig

@@ -203,6 +203,18 @@ config MOUSE_BCM5974
 	  To compile this driver as a module, choose M here: the
 	  module will be called bcm5974.
 
+config MOUSE_CYAPA
+	tristate "Cypress APA I2C Trackpad support"
+	depends on I2C
+	help
+	  This driver adds support for Cypress All Points Addressable (APA)
+	  I2C Trackpads, including the ones used in 2012 Samsung Chromebooks.
+
+	  Say Y here if you have a Cypress APA I2C Trackpad.
+
+	  To compile this driver as a module, choose M here: the module will be
+	  called cyapa.
+
 config MOUSE_INPORT
 	tristate "InPort/MS/ATIXL busmouse"
 	depends on ISA

drivers/input/mouse/Makefile

@@ -8,6 +8,7 @@ obj-$(CONFIG_MOUSE_AMIGA)		+= amimouse.o
 obj-$(CONFIG_MOUSE_APPLETOUCH)		+= appletouch.o
 obj-$(CONFIG_MOUSE_ATARI)		+= atarimouse.o
 obj-$(CONFIG_MOUSE_BCM5974)		+= bcm5974.o
+obj-$(CONFIG_MOUSE_CYAPA)		+= cyapa.o
 obj-$(CONFIG_MOUSE_GPIO)		+= gpio_mouse.o
 obj-$(CONFIG_MOUSE_INPORT)		+= inport.o
 obj-$(CONFIG_MOUSE_LOGIBM)		+= logibm.o