media: ov8856: Add support for OV8856 sensor

This patch adds driver for Omnivision's ov8856 sensor,
the driver supports following features:

- manual exposure/gain(analog and digital) control support
- two link frequencies
- VBLANK/HBLANK support
- test pattern support
- media controller support
- runtime PM support
- enable Vsync signal output
- supported resolutions
  + 3280x2464 at 30FPS
  + 1640x1232 at 30FPS

Signed-off-by: Ben Kao <ben.kao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

MAINTAINERS

@@ -11234,6 +11234,13 @@ L:	linux-media@vger.kernel.org
 S:	Maintained
 F:	drivers/media/i2c/ov9640.*
 
+OMNIVISION OV8856 SENSOR DRIVER
+M:	Ben Kao <ben.kao@intel.com>
+L:	linux-media@vger.kernel.org
+T:	git git://linuxtv.org/media_tree.git
+S:	Maintained
+F:	drivers/media/i2c/ov8856.c
+
 OMNIVISION OV9650 SENSOR DRIVER
 M:	Sakari Ailus <sakari.ailus@linux.intel.com>
 R:	Akinobu Mita <akinobu.mita@gmail.com>

drivers/media/i2c/Kconfig

@@ -820,6 +820,18 @@ config VIDEO_OV7740
 	  This is a Video4Linux2 sensor driver for the OmniVision
 	  OV7740 VGA camera sensor.
 
+config VIDEO_OV8856
+	tristate "OmniVision OV8856 sensor support"
+	depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+	depends on MEDIA_CAMERA_SUPPORT
+	select V4L2_FWNODE
+	help
+	  This is a Video4Linux2 sensor driver for the OmniVision
+	  OV8856 camera sensor.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ov8856.
+
 config VIDEO_OV9640
 	tristate "OmniVision OV9640 sensor support"
 	depends on I2C && VIDEO_V4L2

drivers/media/i2c/Makefile

@@ -78,6 +78,7 @@ obj-$(CONFIG_VIDEO_OV7640) += ov7640.o
 obj-$(CONFIG_VIDEO_OV7670) += ov7670.o
 obj-$(CONFIG_VIDEO_OV772X) += ov772x.o
 obj-$(CONFIG_VIDEO_OV7740) += ov7740.o
+obj-$(CONFIG_VIDEO_OV8856) += ov8856.o
 obj-$(CONFIG_VIDEO_OV9640) += ov9640.o
 obj-$(CONFIG_VIDEO_OV9650) += ov9650.o
 obj-$(CONFIG_VIDEO_OV13858) += ov13858.o