89 lines
2.3 KiB
Plaintext
Executable file
89 lines
2.3 KiB
Plaintext
Executable file
Atmel LCDC Framebuffer
|
|
-----------------------------------------------------
|
|
|
|
Required properties:
|
|
- compatible :
|
|
"atmel,at91sam9261-lcdc" ,
|
|
"atmel,at91sam9263-lcdc" ,
|
|
"atmel,at91sam9g10-lcdc" ,
|
|
"atmel,at91sam9g45-lcdc" ,
|
|
"atmel,at91sam9g45es-lcdc" ,
|
|
"atmel,at91sam9rl-lcdc" ,
|
|
"atmel,at32ap-lcdc"
|
|
- reg : Should contain 1 register ranges(address and length).
|
|
Can contain an additional register range(address and length)
|
|
for fixed framebuffer memory. Useful for dedicated memories.
|
|
- interrupts : framebuffer controller interrupt
|
|
- display: a phandle pointing to the display node
|
|
|
|
Required nodes:
|
|
- display: a display node is required to initialize the lcd panel
|
|
This should be in the board dts.
|
|
- default-mode: a videomode within the display with timing parameters
|
|
as specified below.
|
|
|
|
Optional properties:
|
|
- lcd-supply: Regulator for LCD supply voltage.
|
|
|
|
Example:
|
|
|
|
fb0: fb@00500000 {
|
|
compatible = "atmel,at91sam9g45-lcdc";
|
|
reg = <0x00500000 0x1000>;
|
|
interrupts = <23 3 0>;
|
|
pinctrl-names = "default";
|
|
pinctrl-0 = <&pinctrl_fb>;
|
|
display = <&display0>;
|
|
#address-cells = <1>;
|
|
#size-cells = <1>;
|
|
|
|
};
|
|
|
|
Example for fixed framebuffer memory:
|
|
|
|
fb0: fb@00500000 {
|
|
compatible = "atmel,at91sam9263-lcdc";
|
|
reg = <0x00700000 0x1000 0x70000000 0x200000>;
|
|
[...]
|
|
};
|
|
|
|
Atmel LCDC Display
|
|
-----------------------------------------------------
|
|
Required properties (as per of_videomode_helper):
|
|
|
|
- atmel,dmacon: dma controller configuration
|
|
- atmel,lcdcon2: lcd controller configuration
|
|
- atmel,guard-time: lcd guard time (Delay in frame periods)
|
|
- bits-per-pixel: lcd panel bit-depth.
|
|
|
|
Optional properties (as per of_videomode_helper):
|
|
- atmel,lcdcon-backlight: enable backlight
|
|
- atmel,lcdcon-backlight-inverted: invert backlight PWM polarity
|
|
- atmel,lcd-wiring-mode: lcd wiring mode "RGB" or "BRG"
|
|
- atmel,power-control-gpio: gpio to power on or off the LCD (as many as needed)
|
|
|
|
Example:
|
|
display0: display {
|
|
bits-per-pixel = <32>;
|
|
atmel,lcdcon-backlight;
|
|
atmel,dmacon = <0x1>;
|
|
atmel,lcdcon2 = <0x80008002>;
|
|
atmel,guard-time = <9>;
|
|
atmel,lcd-wiring-mode = <1>;
|
|
|
|
display-timings {
|
|
native-mode = <&timing0>;
|
|
timing0: timing0 {
|
|
clock-frequency = <9000000>;
|
|
hactive = <480>;
|
|
vactive = <272>;
|
|
hback-porch = <1>;
|
|
hfront-porch = <1>;
|
|
vback-porch = <40>;
|
|
vfront-porch = <1>;
|
|
hsync-len = <45>;
|
|
vsync-len = <1>;
|
|
};
|
|
};
|
|
};
|