Documentation/devicetree/bindings/display/atmel,lcdc.txt

   1 Atmel LCDC Framebuffer
   2 -----------------------------------------------------
   3
   4 Required 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
  18 Required 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
  24 Optional properties:
  25 - lcd-supply: Regulator for LCD supply voltage.
  26
  27 Example:
  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
  41 Example for fixed framebuffer memory:
  42
  43         fb0: fb@00500000 {
  44                 compatible = "atmel,at91sam9263-lcdc";
  45                 reg = <0x00700000 0x1000 0x70000000 0x200000>;
  46                 [...]
  47         };
  48
  49 Atmel LCDC Display
  50 -----------------------------------------------------
  51 Required 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
  58 Optional 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
  64 Example:
  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         };