media: ov9650: add device tree binding

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

Cc: Sylwester Nawrocki <[e-mail]>
Cc: Jacopo Mondi <[e-mail]>
Cc: H. Nikolaus Schaller <[e-mail]>
Cc: Hugues Fruchet <[e-mail]>
Cc: Mauro Carvalho Chehab <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Signed-off-by: Akinobu Mita <[e-mail]>
Reviewed-by: Jacopo Mondi <[e-mail]>
Signed-off-by: Sakari Ailus <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

Documentation/devicetree/bindings/media/i2c/ov9650.txt

···
+* 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>;
+			};
+		};
+	};
+};

MAINTAINERS

···
 T:	git git://linuxtv.org/media_tree.git
 S:	Maintained
 F:	drivers/media/i2c/ov9650.c
+F:	Documentation/devicetree/bindings/media/i2c/ov9650.txt
 
 ONENAND FLASH DRIVER
 M:	Kyungmin Park <[e-mail]>