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