90 lines
2.4 KiB
Plaintext
90 lines
2.4 KiB
Plaintext
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Atmel LCDC Framebuffer
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-----------------------------------------------------
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Required properties:
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- compatible :
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"atmel,at91sam9261-lcdc" ,
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"atmel,at91sam9263-lcdc" ,
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"atmel,at91sam9g10-lcdc" ,
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"atmel,at91sam9g45-lcdc" ,
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"atmel,at91sam9g45es-lcdc" ,
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"atmel,at91sam9rl-lcdc" ,
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"atmel,at32ap-lcdc"
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- reg : Should contain 1 register ranges(address and length).
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Can contain an additional register range(address and length)
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for fixed framebuffer memory. Useful for dedicated memories.
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- interrupts : framebuffer controller interrupt
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- display: a phandle pointing to the display node
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Required nodes:
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- display: a display node is required to initialize the lcd panel
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This should be in the board dts.
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- default-mode: a videomode within the display with timing parameters
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as specified below.
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Optional properties:
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- lcd-supply: Regulator for LCD supply voltage.
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Example:
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fb0: fb@0x00500000 {
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compatible = "atmel,at91sam9g45-lcdc";
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reg = <0x00500000 0x1000>;
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interrupts = <23 3 0>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_fb>;
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display = <&display0>;
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status = "okay";
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#address-cells = <1>;
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#size-cells = <1>;
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};
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Example for fixed framebuffer memory:
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fb0: fb@0x00500000 {
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compatible = "atmel,at91sam9263-lcdc";
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reg = <0x00700000 0x1000 0x70000000 0x200000>;
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[...]
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};
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Atmel LCDC Display
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-----------------------------------------------------
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Required properties (as per of_videomode_helper):
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- atmel,dmacon: dma controller configuration
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- atmel,lcdcon2: lcd controller configuration
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- atmel,guard-time: lcd guard time (Delay in frame periods)
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- bits-per-pixel: lcd panel bit-depth.
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Optional properties (as per of_videomode_helper):
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- atmel,lcdcon-backlight: enable backlight
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- atmel,lcdcon-backlight-inverted: invert backlight PWM polarity
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- atmel,lcd-wiring-mode: lcd wiring mode "RGB" or "BRG"
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- atmel,power-control-gpio: gpio to power on or off the LCD (as many as needed)
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Example:
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display0: display {
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bits-per-pixel = <32>;
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atmel,lcdcon-backlight;
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atmel,dmacon = <0x1>;
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atmel,lcdcon2 = <0x80008002>;
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atmel,guard-time = <9>;
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atmel,lcd-wiring-mode = <1>;
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display-timings {
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native-mode = <&timing0>;
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timing0: timing0 {
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clock-frequency = <9000000>;
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hactive = <480>;
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vactive = <272>;
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hback-porch = <1>;
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hfront-porch = <1>;
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vback-porch = <40>;
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vfront-porch = <1>;
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hsync-len = <45>;
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vsync-len = <1>;
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};
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};
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};
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