media: imx214: Add imx214 camera sensor driver

Add a V4L2 sub-device driver for the Sony IMX214 image sensor.
This is a camera sensor using the I2C bus for control and the
CSI-2 bus for data.

Tested on a DB820c alike board with Intrinsyc Open-Q 13MP camera.

[Sakari Ailus: squash exposure time max limit patch]
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/i2c/Kconfig

@@ -595,6 +595,18 @@ config VIDEO_APTINA_PLL
 config VIDEO_SMIAPP_PLL
 	tristate
 
+config VIDEO_IMX214
+	tristate "Sony IMX214 sensor support"
+	depends on GPIOLIB && I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+	depends on MEDIA_CAMERA_SUPPORT
+	depends on V4L2_FWNODE
+	help
+	  This is a Video4Linux2 sensor driver for the Sony
+	  IMX214 camera.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called imx214.
+
 config VIDEO_IMX258
 	tristate "Sony IMX258 sensor support"
 	depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API

drivers/media/i2c/Makefile

@@ -106,6 +106,7 @@ obj-$(CONFIG_VIDEO_I2C)		+= video-i2c.o
 obj-$(CONFIG_VIDEO_ML86V7667)	+= ml86v7667.o
 obj-$(CONFIG_VIDEO_OV2659)	+= ov2659.o
 obj-$(CONFIG_VIDEO_TC358743)	+= tc358743.o
+obj-$(CONFIG_VIDEO_IMX214)	+= imx214.o
 obj-$(CONFIG_VIDEO_IMX258)	+= imx258.o
 obj-$(CONFIG_VIDEO_IMX274)	+= imx274.o
 obj-$(CONFIG_VIDEO_IMX319)	+= imx319.o