S5K4E5 is a Samsung raw image sensor controlled via I2C.
This patch adds the DT binding documentation for the same.

Signed-off-by: Arun Kumar K <arun...@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawro...@samsung.com>
---
 .../devicetree/bindings/media/samsung-s5k4e5.txt   |   45 ++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/samsung-s5k4e5.txt

diff --git a/Documentation/devicetree/bindings/media/samsung-s5k4e5.txt 
b/Documentation/devicetree/bindings/media/samsung-s5k4e5.txt
new file mode 100644
index 0000000..0fca087
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/samsung-s5k4e5.txt
@@ -0,0 +1,45 @@
+* Samsung S5K4E5 Raw Image Sensor
+
+S5K4E5 is a raw image sensor with maximum resolution of 2560x1920
+pixels. Data transfer is carried out via MIPI CSI-2 port and controls
+via I2C bus.
+
+Required Properties:
+- compatible   : must be "samsung,s5k4e5"
+- reg          : I2C device address
+- reset-gpios  : specifier of a GPIO connected to the RESET pin
+- clocks       : should contain the sensor's EXTCLK clock specifier, from
+                 the common clock bindings
+- clock-names  : should contain "extclk" entry
+- svdda-supply : core voltage supply
+- svddio-supply        : I/O voltage supply
+
+Optional Properties:
+- clock-frequency : the frequency at which the "extclk" clock should be
+                   configured to operate, in Hz; if this property is not
+                   specified default 24 MHz value will be used
+
+The device node should be added to respective control bus controller
+(e.g. I2C0) nodes and linked to the csis port node, using the common
+video interfaces bindings, defined in video-interfaces.txt.
+
+Example:
+
+       i2c-isp@13130000 {
+               s5k4e5@20 {
+                       compatible = "samsung,s5k4e5";
+                       reg = <0x20>;
+                       reset-gpios = <&gpx1 2 1>;
+                       clock-frequency = <24000000>;
+                       clocks = <&clock 129>;
+                       clock-names = "extclk"
+                       svdda-supply = <...>;
+                       svddio-supply = <...>;
+                       port {
+                               is_s5k4e5_ep: endpoint {
+                                       data-lanes = <1 2 3 4>;
+                                       remote-endpoint = <&csis0_ep>;
+                               };
+                       };
+               };
+       };
-- 
1.7.9.5

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