1Atmel LCDC Framebuffer 2----------------------------------------------------- 3 4Required properties: 5- compatible : 6 "atmel,at91sam9261-lcdc" , 7 "atmel,at91sam9263-lcdc" , 8 "atmel,at91sam9g10-lcdc" , 9 "atmel,at91sam9g45-lcdc" , 10 "atmel,at91sam9g45es-lcdc" , 11 "atmel,at91sam9rl-lcdc" , 12 "atmel,at32ap-lcdc" 13- reg : Should contain 1 register ranges(address and length). 14 Can contain an additional register range(address and length) 15 for fixed framebuffer memory. Useful for dedicated memories. 16- interrupts : framebuffer controller interrupt 17- display: a phandle pointing to the display node 18 19Required nodes: 20- display: a display node is required to initialize the lcd panel 21 This should be in the board dts. 22- default-mode: a videomode within the display with timing parameters 23 as specified below. 24 25Optional properties: 26- lcd-supply: Regulator for LCD supply voltage. 27 28Example: 29 30 fb0: fb@00500000 { 31 compatible = "atmel,at91sam9g45-lcdc"; 32 reg = <0x00500000 0x1000>; 33 interrupts = <23 3 0>; 34 pinctrl-names = "default"; 35 pinctrl-0 = <&pinctrl_fb>; 36 display = <&display0>; 37 #address-cells = <1>; 38 #size-cells = <1>; 39 40 }; 41 42Example for fixed framebuffer memory: 43 44 fb0: fb@00500000 { 45 compatible = "atmel,at91sam9263-lcdc"; 46 reg = <0x00700000 0x1000 0x70000000 0x200000>; 47 [...] 48 }; 49 50Atmel LCDC Display 51----------------------------------------------------- 52Required properties (as per of_videomode_helper): 53 54 - atmel,dmacon: dma controller configuration 55 - atmel,lcdcon2: lcd controller configuration 56 - atmel,guard-time: lcd guard time (Delay in frame periods) 57 - bits-per-pixel: lcd panel bit-depth. 58 59Optional properties (as per of_videomode_helper): 60 - atmel,lcdcon-backlight: enable backlight 61 - atmel,lcdcon-backlight-inverted: invert backlight PWM polarity 62 - atmel,lcd-wiring-mode: lcd wiring mode "RGB" or "BRG" 63 - atmel,power-control-gpio: gpio to power on or off the LCD (as many as needed) 64 65Example: 66 display0: display { 67 bits-per-pixel = <32>; 68 atmel,lcdcon-backlight; 69 atmel,dmacon = <0x1>; 70 atmel,lcdcon2 = <0x80008002>; 71 atmel,guard-time = <9>; 72 atmel,lcd-wiring-mode = <1>; 73 74 display-timings { 75 native-mode = <&timing0>; 76 timing0: timing0 { 77 clock-frequency = <9000000>; 78 hactive = <480>; 79 vactive = <272>; 80 hback-porch = <1>; 81 hfront-porch = <1>; 82 vback-porch = <40>; 83 vfront-porch = <1>; 84 hsync-len = <45>; 85 vsync-len = <1>; 86 }; 87 }; 88 }; 89