ARM: at91: dts: sama5d3: add ov2640 camera sensor support

According to v4l2 dt document, we add:
  a camera host: ISI port.
  a i2c camera sensor: ov2640 port.
to sama5d3xmb.dtsi.

The ov2640 node defines the pinctrls, clocks and refer to isi port.
The ISI node also has a reference to the ov2640 port.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/boot/dts/sama5d3.dtsi

@@ -219,9 +219,15 @@
 				compatible = "atmel,at91sam9g45-isi";
 				reg = <0xf0034000 0x4000>;
 				interrupts = <37 IRQ_TYPE_LEVEL_HIGH 5>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&pinctrl_isi_data_0_7>;
 				clocks = <&isi_clk>;
 				clock-names = "isi_clk";
 				status = "disabled";
+				port {
+					#address-cells = <1>;
+					#size-cells = <0>;
+				};
 			};
 
 			sfr: sfr@f0038000 {

arch/arm/boot/dts/sama5d3xmb.dtsi

@@ -52,6 +52,29 @@
 				};
 			};
 
+			i2c1: i2c@f0018000 {
+				ov2640: camera@0x30 {
+					compatible = "ovti,ov2640";
+					reg = <0x30>;
+					pinctrl-names = "default";
+					pinctrl-0 = <&pinctrl_pck1_as_isi_mck &pinctrl_sensor_power &pinctrl_sensor_reset>;
+					resetb-gpios = <&pioE 24 GPIO_ACTIVE_LOW>;
+					pwdn-gpios = <&pioE 29 GPIO_ACTIVE_HIGH>;
+					/* use pck1 for the master clock of ov2640 */
+					clocks = <&pck1>;
+					clock-names = "xvclk";
+					assigned-clocks = <&pck1>;
+					assigned-clock-rates = <25000000>;
+
+					port {
+						ov2640_0: endpoint {
+							remote-endpoint = <&isi_0>;
+							bus-width = <8>;
+						};
+					};
+				};
+			};
+
 			usart1: serial@f0020000 {
 				dmas = <0>, <0>;	/*  Do not use DMA for usart1 */
 				pinctrl-names = "default";
@@ -60,8 +83,12 @@
 			};
 
 			isi: isi@f0034000 {
-				pinctrl-names = "default";
+				port {
-				pinctrl-0 = <&pinctrl_isi_data_0_7>;
+					isi_0: endpoint {
+						remote-endpoint = <&ov2640_0>;
+						bus-width = <8>;
+					};
+				};
 			};
 
 			mmc1: mmc@f8000000 {