[media] Add DT binding documentation for Samsung S5K5BAF camera sensor

Samsung S5K5BAF UXGA 1/5" 2M CMOS Image Sensor with embedded SoC ISP

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Required properties:

- compatible	  : "samsung,s5k5baf";

- reg		  : I2C slave address of the sensor;

- vdda-supply	  : analog power supply 2.8V (2.6V to 3.0V);

- vddreg-supply	  : regulator input power supply 1.8V (1.7V to 1.9V)

		    or 2.8V (2.6V to 3.0);

- vddio-supply	  : I/O power supply 1.8V (1.65V to 1.95V)

		    or 2.8V (2.5V to 3.1V);

- stbyn-gpios	  : GPIO connected to STDBYN pin;

- rstn-gpios	  : GPIO connected to RSTN pin;

- clocks	  : list of phandle and clock specifier pairs

		    according to common clock bindings for the

		    clocks described in clock-names;

- clock-names	  : should include "mclk" for the sensor's master clock;

Optional properties:

- clock-frequency : the frequency at which the "mclk" 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 contain one 'port' child node with one child 'endpoint'

node, according to the bindings defined in Documentation/devicetree/bindings/

media/video-interfaces.txt. The following are properties specific to those

nodes.

endpoint node

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- data-lanes : (optional) specifies MIPI CSI-2 data lanes as covered in

	       video-interfaces.txt. If present it should be <1> - the device

	       supports only one data lane without re-mapping.

Example:

s5k5bafx@2d {

	compatible = "samsung,s5k5baf";

	reg = <0x2d>;

	vdda-supply = <&cam_io_en_reg>;

	vddreg-supply = <&vt_core_15v_reg>;

	vddio-supply = <&vtcam_reg>;

	stbyn-gpios = <&gpl2 0 1>;

	rstn-gpios = <&gpl2 1 1>;

	clock-names = "mclk";

	clocks = <&clock_cam 0>;

	clock-frequency = <24000000>;

	port {

		s5k5bafx_ep: endpoint {

			remote-endpoint = <&csis1_ep>;

			data-lanes = <1>;

		};

	};

};