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Ingenic JZ47xx LCD driver

Required properties:
- compatible: one of:
  * ingenic,jz4740-lcd
  * ingenic,jz4725b-lcd
  * ingenic,jz4770-lcd
- reg: LCD registers location and length
- clocks: LCD pixclock and device clock specifiers.
	   The device clock is only required on the JZ4740.
- clock-names: "lcd_pclk" and "lcd"
- interrupts: Specifies the interrupt line the LCD controller is connected to.

Example:

panel {
	compatible = "sharp,ls020b1dd01d";

	backlight = <&backlight>;
	power-supply = <&vcc>;

	port {
		panel_input: endpoint {
			remote-endpoint = <&panel_output>;
		};
	};
};


lcd: lcd-controller@13050000 {
	compatible = "ingenic,jz4725b-lcd";
	reg = <0x13050000 0x1000>;

	interrupt-parent = <&intc>;
	interrupts = <31>;

	clocks = <&cgu JZ4725B_CLK_LCD>;
	clock-names = "lcd";

	port {
		panel_output: endpoint {
			remote-endpoint = <&panel_input>;
		};
	};
};