Input: add AD7879 Touchscreen driver

[randy.dunlap@oracle.com: don't use bus_id]
[dtor@mail.ru: locking and other fixups]
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/touchscreen/Kconfig

@@ -42,6 +42,38 @@ config TOUCHSCREEN_AD7877
 	  To compile this driver as a module, choose M here: the
 	  module will be called ad7877.
 
+config TOUCHSCREEN_AD7879_I2C
+	tristate "AD7879 based touchscreens: AD7879-1 I2C Interface"
+	depends on I2C
+	select TOUCHSCREEN_AD7879
+	help
+	  Say Y here if you have a touchscreen interface using the
+	  AD7879-1 controller, and your board-specific initialization
+	  code includes that in its table of I2C devices.
+
+	  If unsure, say N (but it's safe to say "Y").
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad7879.
+
+config TOUCHSCREEN_AD7879_SPI
+	tristate "AD7879 based touchscreens: AD7879 SPI Interface"
+	depends on SPI_MASTER && TOUCHSCREEN_AD7879_I2C = n
+	select TOUCHSCREEN_AD7879
+	help
+	  Say Y here if you have a touchscreen interface using the
+	  AD7879 controller, and your board-specific initialization
+	  code includes that in its table of SPI devices.
+
+	  If unsure, say N (but it's safe to say "Y").
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad7879.
+
+config TOUCHSCREEN_AD7879
+	tristate
+	default n
+
 config TOUCHSCREEN_BITSY
 	tristate "Compaq iPAQ H3600 (Bitsy) touchscreen"
 	depends on SA1100_BITSY

drivers/input/touchscreen/Makefile

@@ -7,6 +7,7 @@
 wm97xx-ts-y := wm97xx-core.o
 
 obj-$(CONFIG_TOUCHSCREEN_AD7877)	+= ad7877.o
+obj-$(CONFIG_TOUCHSCREEN_AD7879)	+= ad7879.o
 obj-$(CONFIG_TOUCHSCREEN_ADS7846)	+= ads7846.o
 obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC)	+= atmel_tsadcc.o
 obj-$(CONFIG_TOUCHSCREEN_BITSY)		+= h3600_ts_input.o