| 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@0x00500000 { |
| compatible = "atmel,at91sam9g45-lcdc"; |
| reg = <0x00500000 0x1000>; |
| interrupts = <23 3 0>; |
| pinctrl-names = "default"; |
| pinctrl-0 = <&pinctrl_fb>; |
| display = <&display0>; |
| status = "okay"; |
| #address-cells = <1>; |
| #size-cells = <1>; |
| |
| }; |
| |
| Example for fixed framebuffer memory: |
| |
| fb0: fb@0x00500000 { |
| 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>; |
| }; |
| }; |
| }; |
