[media] Add GS1662 driver, a video serializer

You can read datasheet here:
http://www.c-dis.net/media/871/GS1662_Datasheet.pdf

It's a component which supports HD and SD CEA or SDI formats
to SDI output. It's configured through SPI bus.

GS1662 driver is implemented as v4l2 subdev.
Signed-off-by: Charles-Antoine Couret <charles-antoine.couret@nexvision.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

MAINTAINERS

@@ -5259,6 +5259,13 @@ L:	netdev@vger.kernel.org
 S:	Maintained
 F:	drivers/net/ethernet/aeroflex/
 
+GS1662 VIDEO SERIALIZER
+M:	Charles-Antoine Couret <charles-antoine.couret@nexvision.fr>
+L:	linux-media@vger.kernel.org
+T:	git git://linuxtv.org/media_tree.git
+S:	Maintained
+F:	drivers/media/spi/gs1662.c
+
 GSPCA FINEPIX SUBDRIVER
 M:	Frank Zago <frank@zago.net>
 L:	linux-media@vger.kernel.org

drivers/media/Kconfig

@@ -218,5 +218,6 @@ config MEDIA_ATTACH
 source "drivers/media/i2c/Kconfig"
 source "drivers/media/tuners/Kconfig"
 source "drivers/media/dvb-frontends/Kconfig"
+source "drivers/media/spi/Kconfig"
 
 endif # MEDIA_SUPPORT

drivers/media/Makefile

@@ -32,6 +32,6 @@ obj-y += rc/
 # Finally, merge the drivers that require the core
 #
 
-obj-y += common/ platform/ pci/ usb/ mmc/ firewire/
+obj-y += common/ platform/ pci/ usb/ mmc/ firewire/ spi/
 obj-$(CONFIG_VIDEO_DEV) += radio/
 

drivers/media/spi/Kconfig

+if VIDEO_V4L2
+
+config VIDEO_GS1662
+	tristate "Gennum Serializers video"
+	depends on SPI && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+	---help---
+	  Enable the GS1662 driver which serializes video streams.
+
+endif

drivers/media/spi/Makefile

+obj-$(CONFIG_VIDEO_GS1662) += gs1662.o