dt-bindings: media: i2c: Document add sp250a

Signed-off-by: Wang Panzhenzhuan <randy.wang@rock-chips.com>
Change-Id: Ia40942d69ada24084eff53977771497effe3f315

Documentation/devicetree/bindings/media/i2c/sp250a.txt

@@ -0,0 +1,49 @@
+* Superpix SP250A MIPI CSI-2 sensor
+
+Required Properties:
+- compatible: should be "superpix,sp250a".
+- clocks: reference to the 24M xvclk input clock.
+- clock-names: should be "xvclk".
+- power-domains: should be "power RK3568_PD_VI" for RK356x.
+- dovdd-supply: Digital I/O voltage supply, 1.8/2.8 volts
+- avdd-supply: Analog voltage supply, 2.8 volts
+- reset-gpios: High active reset gpio
+- pwdn-gpios: High active power-down gpio
+
+The device node must contain one 'port' child node for its digital output
+video port, and this port must have a single endpoint in accordance with
+ the video interface bindings defined in
+Documentation/devicetree/bindings/media/video-interfaces.txt.
+
+Endpoint node required properties for CSI-2 connection are:
+- remote-endpoint: a phandle to the bus receiver's endpoint node.
+- data-lanes: should be set to <1> (one CSI-2 lane supported).
+
+Example:
+
+&i2c2 {
+	status = "okay";
+
+	sp250a: sp250a@3c {
+		compatible = "superpix,sp250a";
+		status = "okay";
+		reg = <0x3c>;
+		clocks = <&cru CLK_CIF_OUT>;
+		clock-names = "xvclk";
+		power-domains = <&power RK3568_PD_VI>;
+		avdd-supply = <&vcc2v8_dvp>;
+		dovdd-supply = <&vcc1v8_dvp>;
+		reset-gpios = <&gpio4 RK_PB0 GPIO_ACTIVE_HIGH>;
+		pwdn-gpios = <&gpio4 RK_PB3 GPIO_ACTIVE_HIGH>;
+		rockchip,camera-module-index = <1>;
+		rockchip,camera-module-facing = "front";
+		rockchip,camera-module-name = "LM50A60-S107-YK-XJL-V2";
+		rockchip,camera-module-lens-name = "default";
+		port {
+			sp250a_out: endpoint {
+				remote-endpoint = <&mipi_in_ucam2>;
+				data-lanes = <1>;
+			};
+		};
+	};
+};