video: auo_k190x: add code shared by controller drivers

The AUO-K190X controllers share a very similar set of commands and
can therefore also share most of the driver code.

Signed-off-by: Heiko Stübner <heiko@sntech.de>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index edc2a22..caf9eaa 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -2382,6 +2382,23 @@
 	  and could also have been called by other names when coupled with
 	  a bridge adapter.
 
+config FB_AUO_K190X
+	tristate "AUO-K190X EPD controller support"
+	depends on FB
+	select FB_SYS_FILLRECT
+	select FB_SYS_COPYAREA
+	select FB_SYS_IMAGEBLIT
+	select FB_SYS_FOPS
+	select FB_DEFERRED_IO
+	help
+	  Provides support for epaper controllers from the K190X series
+	  of AUO. These controllers can be used to drive epaper displays
+	  from Sipix.
+
+	  This option enables the common support, shared by the individual
+	  controller drivers. You will also have to enable the driver
+	  for the controller type used in your device.
+
 config FB_JZ4740
 	tristate "JZ4740 LCD framebuffer support"
 	depends on FB && MACH_JZ4740