ARM: dts: imx6q-apalis: Add ov5640 mipi csi camera

The Apalis iMX6 modules allow connecting a mipi-csi video input.
Add support for our OV5640 camera module but have it disabled.
This allows to enable it in an overlay per the current system
configuration.

Signed-off-by: Oleksandr Suvorov <[e-mail]>
Signed-off-by: Max Krummenacher <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx6qdl-apalis.dtsi

···
 		status = "disabled";
 	};
 
+	clk_ov5640_osc: clk-ov5640-osc {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24000000>;
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 		pinctrl-names = "default";
···
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
 		regulator-always-on;
+	};
+
+	reg_ov5640_1v8_d_o_vdd: regulator-ov5640-1v8-d-o-vdd {
+		compatible = "regulator-fixed";
+		regulator-always-on;
+		regulator-max-microvolt = <1800000>;
+		regulator-min-microvolt = <1800000>;
+		regulator-name = "DOVDD/DVDD_1.8V";
+		/* Note: The CSI module uses on-board 3.3V_SW supply */
+		vin-supply = <&reg_module_3v3>;
+	};
+
+	reg_ov5640_2v8_a_vdd: regulator-ov5640-2v8-a-vdd {
+		compatible = "regulator-fixed";
+		regulator-always-on;
+		regulator-max-microvolt = <2800000>;
+		regulator-min-microvolt = <2800000>;
+		regulator-name = "AVDD/AFVDD_2.8V";
+		/* Note: The CSI module uses on-board 3.3V_SW supply */
+		vin-supply = <&reg_module_3v3>;
 	};
 
 	reg_usb_otg_vbus: regulator-usb-otg-vbus {
···
 		reset-gpios = <&gpio6 9 GPIO_ACTIVE_LOW>;	/* MXM3_13 */
 		status = "disabled";
 	};
-
 };
 
 /*
···
 	scl-gpios = <&gpio3 17 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	sda-gpios = <&gpio3 18 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	status = "disabled";
+
+	ov5640_csi_cam: ov5640_mipi@3c {
+		compatible = "ovti,ov5640";
+		AVDD-supply = <&reg_ov5640_2v8_a_vdd>;
+		DOVDD-supply = <&reg_ov5640_1v8_d_o_vdd>;
+		DVDD-supply = <&reg_ov5640_1v8_d_o_vdd>;
+		clock-names = "xclk";
+		clocks = <&clks IMX6QDL_CLK_CKO2>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_cam_mclk>;
+		/* These GPIOs are muxed with the iomuxc node */
+		powerdown-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>;
+		reg = <0x3c>;
+		reset-gpios = <&gpio2 4 GPIO_ACTIVE_LOW>;
+		status = "disabled";
+
+		port {
+			ov5640_to_mipi_csi2: endpoint {
+				clock-lanes = <0>;
+				data-lanes = <1 2>;
+				remote-endpoint = <&mipi_csi_from_ov5640>;
+			};
+		};
+	};
 };
 
 &ipu1_di1_disp1 {
···
 
 			lvds1_out: endpoint {
 			};
+		};
+	};
+};
+
+&mipi_csi {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "disabled";
+
+	port@0 {
+		reg = <0>;
+
+		mipi_csi_from_ov5640: endpoint {
+			clock-lanes = <0>;
+			data-lanes = <1 2>;
+			remote-endpoint = <&ov5640_to_mipi_csi2>;
 		};
 	};
 };