Renesas R-Car MIPI CSI-2
------------------------

The R-Car CSI-2 receiver device provides MIPI CSI-2 capabilities for the
Renesas R-Car and RZ/G2 family of devices. It is used in conjunction with the
R-Car VIN module, which provides the video capture capabilities.

Mandatory properties
--------------------
 - compatible: Must be one or more of the following
   - "renesas,r8a774a1-csi2" for the R8A774A1 device.
   - "renesas,r8a774c0-csi2" for the R8A774C0 device.
   - "renesas,r8a7795-csi2" for the R8A7795 device.
   - "renesas,r8a7796-csi2" for the R8A7796 device.
   - "renesas,r8a77965-csi2" for the R8A77965 device.
   - "renesas,r8a77970-csi2" for the R8A77970 device.
   - "renesas,r8a77980-csi2" for the R8A77980 device.
   - "renesas,r8a77990-csi2" for the R8A77990 device.

 - reg: the register base and size for the device registers
 - interrupts: the interrupt for the device
 - clocks: A phandle + clock specifier for the module clock
 - resets: A phandle + reset specifier for the module reset

The device node shall contain two 'port' child nodes according to the
bindings defined in Documentation/devicetree/bindings/media/
video-interfaces.txt. port@0 shall connect to the CSI-2 source. port@1
shall connect to all the R-Car VIN modules that have a hardware
connection to the CSI-2 receiver.

- port@0- Video source (mandatory)
	- endpoint@0 - sub-node describing the endpoint that is the video source

- port@1 - VIN instances (optional)
	- One endpoint sub-node for every R-Car VIN instance which is connected
	  to the R-Car CSI-2 receiver.

Example:

	csi20: csi2@fea80000 {
		compatible = "renesas,r8a7796-csi2";
		reg = <0 0xfea80000 0 0x10000>;
		interrupts = <0 184 IRQ_TYPE_LEVEL_HIGH>;
		clocks = <&cpg CPG_MOD 714>;
		power-domains = <&sysc R8A7796_PD_ALWAYS_ON>;
		resets = <&cpg 714>;

		ports {
			#address-cells = <1>;
			#size-cells = <0>;

			port@0 {
				#address-cells = <1>;
				#size-cells = <0>;

				reg = <0>;

				csi20_in: endpoint@0 {
					reg = <0>;
					clock-lanes = <0>;
					data-lanes = <1>;
					remote-endpoint = <&adv7482_txb>;
				};
			};

			port@1 {
				#address-cells = <1>;
				#size-cells = <0>;

				reg = <1>;

				csi20vin0: endpoint@0 {
					reg = <0>;
					remote-endpoint = <&vin0csi20>;
				};
				csi20vin1: endpoint@1 {
					reg = <1>;
					remote-endpoint = <&vin1csi20>;
				};
				csi20vin2: endpoint@2 {
					reg = <2>;
					remote-endpoint = <&vin2csi20>;
				};
				csi20vin3: endpoint@3 {
					reg = <3>;
					remote-endpoint = <&vin3csi20>;
				};
				csi20vin4: endpoint@4 {
					reg = <4>;
					remote-endpoint = <&vin4csi20>;
				};
				csi20vin5: endpoint@5 {
					reg = <5>;
					remote-endpoint = <&vin5csi20>;
				};
				csi20vin6: endpoint@6 {
					reg = <6>;
					remote-endpoint = <&vin6csi20>;
				};
				csi20vin7: endpoint@7 {
					reg = <7>;
					remote-endpoint = <&vin7csi20>;
				};
			};
		};
	};