[media] v4l: Add v4l2 subdev driver for S5P/EXYNOS4 MIPI-CSI receivers

Add the subdev driver for the MIPI CSIS units available in S5P and
Exynos4 SoC series. This driver supports both CSIS0 and CSIS1
MIPI-CSI2 receivers.
The driver requires Runtime PM to be enabled for proper operation.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index a705493..9c701dd 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -946,6 +946,15 @@
 	  To compile this driver as a module, choose M here: the
 	  module will be called s5p-fimc.
 
+config VIDEO_S5P_MIPI_CSIS
+	tristate "Samsung S5P and EXYNOS4 MIPI CSI receiver driver"
+	depends on VIDEO_V4L2 && PM_RUNTIME && VIDEO_V4L2_SUBDEV_API
+	---help---
+	  This is a v4l2 driver for Samsung S5P/EXYNOS4 MIPI-CSI receiver.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called s5p-csis.
+
 #
 # USB Multimedia device configuration
 #