TI AM335x BeagleBone Black LCD驱动移植

1.内核编译选项

2.设备树

/ {
	model = "TI AM335x BeagleBone Black";
	compatible = "ti,am335x-bone-black", "ti,am335x-bone", "ti,am33xx";
	panel {
		compatible = "ti,tilcdc,panel";
		status = "okay";
		pinctrl-names = "default";
		pinctrl-0 = <&lcd_pins_s0>;
		panel-info {
			ac-bias           = <255>;
			ac-bias-intrpt    = <0>;
			dma-burst-sz      = <16>;
			bpp               = <32>;
			fdd               = <0x80>;
			sync-edge         = <0>;
			sync-ctrl         = <1>;
			raster-order      = <0>;
			fifo-th           = <0>;
		};

		display-timings {
			1280x800p60 {
				clock-frequency = <68000000>;
				hactive = <1280>;
				vactive = <800>;
				hfront-porch = <64>;
				hback-porch = <5>;
				hsync-len = <47>;
				vback-porch = <2>;
				vfront-porch = <13>;
				vsync-len = <2>;
				hsync-active = <1>;
				vsync-active = <1>;
			};
};
};
&lcdc {
	status = "okay";
	blue-and-red-wiring = "crossed";
};
lcd_pins_s0: lcd_pins_s0 {
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x820, PIN_OUTPUT | MUX_MODE1)	
			AM33XX_IOPAD(0x824, PIN_OUTPUT | MUX_MODE1)		
			AM33XX_IOPAD(0x828, PIN_OUTPUT | MUX_MODE1)	
			AM33XX_IOPAD(0x82c, PIN_OUTPUT | MUX_MODE1)		
			AM33XX_IOPAD(0x830, PIN_OUTPUT | MUX_MODE1)		
			AM33XX_IOPAD(0x834, PIN_OUTPUT | MUX_MODE1)		
			AM33XX_IOPAD(0x838, PIN_OUTPUT | MUX_MODE1)		
			AM33XX_IOPAD(0x83c, PIN_OUTPUT | MUX_MODE1)		
			AM33XX_IOPAD(0x8a0, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8a4, PIN_OUTPUT | MUX_MODE0)								AM33XX_IOPAD(0x8a8, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8ac, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8b0, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8b4, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8b8, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8bc, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8c0, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8c4, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8c8, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8cc, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8d0, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8d4, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8d8, PIN_OUTPUT | MUX_MODE0)								AM33XX_IOPAD(0x8dc, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8e0, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8e4, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8e8, PIN_OUTPUT | MUX_MODE0)		
			AM33XX_IOPAD(0x8ec, PIN_OUTPUT | MUX_MODE0)		
		>;
	};

注意：这是lvds信号的屏幕，TI官方默认的是hdmi的屏幕，需要注释掉。