media: imx208: Add imx208 camera sensor driver

Add a V4L2 sub-device driver for the Sony IMX208 image sensor.
This is a camera sensor using the I2C bus for control and the
CSI-2 bus for data.

[Sakari Ailus: Rename sensor async register function to make it compile,
	       use exposure_max and wrap a few long lines.]

Signed-off-by: Ping-Chung Chen <ping-chung.chen@intel.com>
Signed-off-by: Yeh, Andy <andy.yeh@intel.com>
Signed-off-by: Shawn Tu <shawnx.tu@intel.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

MAINTAINERS

@@ -17002,6 +17002,13 @@ S:	Maintained
 F:	drivers/ssb/
 F:	include/linux/ssb/
 
+SONY IMX208 SENSOR DRIVER
+M:	Sakari Ailus <sakari.ailus@linux.intel.com>
+L:	linux-media@vger.kernel.org
+S:	Maintained
+T:	git git://linuxtv.org/media_tree.git
+F:	drivers/media/i2c/imx208.c
+
 SONY IMX214 SENSOR DRIVER
 M:	Ricardo Ribalda <ribalda@kernel.org>
 L:	linux-media@vger.kernel.org

drivers/media/i2c/Kconfig

@@ -742,6 +742,17 @@ config VIDEO_HI556
 	  To compile this driver as a module, choose M here: the
 	  module will be called hi556.
 
+config VIDEO_IMX208
+	tristate "Sony IMX208 sensor support"
+	depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+	depends on MEDIA_CAMERA_SUPPORT
+	help
+	  This is a Video4Linux2 sensor driver for the Sony
+	  IMX208 camera.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called imx208.
+
 config VIDEO_IMX214
 	tristate "Sony IMX214 sensor support"
 	depends on GPIOLIB && I2C && VIDEO_V4L2

drivers/media/i2c/Makefile

@@ -116,6 +116,7 @@ obj-$(CONFIG_VIDEO_ML86V7667)	+= ml86v7667.o
 obj-$(CONFIG_VIDEO_OV2659)	+= ov2659.o
 obj-$(CONFIG_VIDEO_TC358743)	+= tc358743.o
 obj-$(CONFIG_VIDEO_HI556)	+= hi556.o
+obj-$(CONFIG_VIDEO_IMX208)	+= imx208.o
 obj-$(CONFIG_VIDEO_IMX214)	+= imx214.o
 obj-$(CONFIG_VIDEO_IMX219)	+= imx219.o
 obj-$(CONFIG_VIDEO_IMX258)	+= imx258.o