[media] atmel-isc: DT binding for Image Sensor Controller driver

Atmel Image Sensor Controller (ISC)

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Required properties for ISC:

- compatible

	Must be "atmel,sama5d2-isc".

- reg

	Physical base address and length of the registers set for the device.

- interrupts

	Should contain IRQ line for the ISC.

- clocks

	List of clock specifiers, corresponding to entries in

	the clock-names property;

	Please refer to clock-bindings.txt.

- clock-names

	Required elements: "hclock", "iscck", "gck".

- #clock-cells

	Should be 0.

- clock-output-names

	Should be "isc-mck".

- pinctrl-names, pinctrl-0

	Please refer to pinctrl-bindings.txt.

ISC supports a single port node with parallel bus. It should contain one

'port' child node with child 'endpoint' node. Please refer to the bindings

defined in Documentation/devicetree/bindings/media/video-interfaces.txt.

Example:

isc: isc@f0008000 {

	compatible = "atmel,sama5d2-isc";

	reg = <0xf0008000 0x4000>;

	interrupts = <46 IRQ_TYPE_LEVEL_HIGH 5>;

	clocks = <&isc_clk>, <&iscck>, <&isc_gclk>;

	clock-names = "hclock", "iscck", "gck";

	#clock-cells = <0>;

	clock-output-names = "isc-mck";

	pinctrl-names = "default";

	pinctrl-0 = <&pinctrl_isc_base &pinctrl_isc_data_8bit &pinctrl_isc_data_9_10 &pinctrl_isc_data_11_12>;

	port {

		isc_0: endpoint {

			remote-endpoint = <&ov7740_0>;

			hsync-active = <1>;

			vsync-active = <0>;

			pclk-sample = <1>;

		};

	};

};

i2c1: i2c@fc028000 {

	ov7740: camera@21 {

		compatible = "ovti,ov7740";

		reg = <0x21>;

		clocks = <&isc>;

		clock-names = "xvclk";

		assigned-clocks = <&isc>;

		assigned-clock-rates = <24000000>;

		port {

			ov7740_0: endpoint {

				remote-endpoint = <&isc_0>;

			};

		};

	};

};