[PATCH v2 2/2] media: ov9650: add device tree binding

[Akinobu Mita <akinobu.mita-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Now the ov9650 driver supports device tree probing.  So this adds a
device tree binding documentation.

Cc: Jacopo Mondi <jacopo-AW8dsiIh9cEdnm+yROfE0A@public.gmane.org>
Cc: H. Nikolaus Schaller <hns-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
Cc: Hugues Fruchet <hugues.fruchet-qxv4g6HH51o@public.gmane.org>
Cc: Sakari Ailus <sakari.ailus-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Cc: Mauro Carvalho Chehab <mchehab-JsYNTwtnfakRB7SZvlqPiA@public.gmane.org>
Cc: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Signed-off-by: Akinobu Mita <akinobu.mita-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
* Changelog v2
- Split binding documentation, suggested by Rob Herring and Jacopo Mondi
- Improve the wording for compatible property in the binding documentation,
  suggested by Jacopo Mondi
- Improve the description for the device node in the binding documentation,
  suggested by Sakari Ailus

 .../devicetree/bindings/media/i2c/ov9650.txt       | 36 ++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/ov9650.txt

diff --git a/Documentation/devicetree/bindings/media/i2c/ov9650.txt b/Documentation/devicetree/bindings/media/i2c/ov9650.txt
new file mode 100644
index 0000000..506dfc5
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/ov9650.txt
@@ -0,0 +1,36 @@
+* Omnivision OV9650/OV9652 CMOS sensor
+
+Required Properties:
+- compatible: shall be one of
+	"ovti,ov9650"
+	"ovti,ov9652"
+- clocks: reference to the xvclk input clock.
+
+Optional Properties:
+- reset-gpios: reference to the GPIO connected to the resetb pin, if any.
+  Active is high.
+- powerdown-gpios: reference to the GPIO connected to the pwdn pin, if any.
+  Active is high.
+
+The device node shall contain one 'port' child node with one child 'endpoint'
+subnode for its digital output video port, in accordance with the video
+interface bindings defined in Documentation/devicetree/bindings/media/
+video-interfaces.txt.
+
+Example:
+
+&i2c0 {
+	ov9650: camera@30 {
+		compatible = "ovti,ov9650";
+		reg = <0x30>;
+		reset-gpios = <&axi_gpio_0 0 GPIO_ACTIVE_HIGH>;
+		powerdown-gpios = <&axi_gpio_0 1 GPIO_ACTIVE_HIGH>;
+		clocks = <&xclk>;
+
+		port {
+			ov9650_0: endpoint {
+				remote-endpoint = <&vcap1_in0>;
+			};
+		};
+	};
+};
-- 
2.7.4

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