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         "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
  19 Required 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
  25 Optional properties:
  26 - lcd-supply: Regulator for LCD supply voltage.
  27
  28 Example:
  29
  30         fb0: fb@0x00500000 {
  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                 status = "okay";
  38                 #address-cells = <1>;
  39                 #size-cells = <1>;
  40
  41         };
  42
  43 Example for fixed framebuffer memory:
  44
  45         fb0: fb@0x00500000 {
  46                 compatible = "atmel,at91sam9263-lcdc";
  47                 reg = <0x00700000 0x1000 0x70000000 0x200000>;
  48                 [...]
  49         };
  50
  51 Atmel LCDC Display
  52 -----------------------------------------------------
  53 Required properties (as per of_videomode_helper):
  54
  55  - atmel,dmacon: dma controller configuration
  56  - atmel,lcdcon2: lcd controller configuration
  57  - atmel,guard-time: lcd guard time (Delay in frame periods)
  58  - bits-per-pixel: lcd panel bit-depth.
  59
  60 Optional properties (as per of_videomode_helper):
  61  - atmel,lcdcon-backlight: enable backlight
  62  - atmel,lcdcon-backlight-inverted: invert backlight PWM polarity
  63  - atmel,lcd-wiring-mode: lcd wiring mode "RGB" or "BRG"
  64  - atmel,power-control-gpio: gpio to power on or off the LCD (as many as needed)
  65
  66 Example:
  67         display0: display {
  68                 bits-per-pixel = <32>;
  69                 atmel,lcdcon-backlight;
  70                 atmel,dmacon = <0x1>;
  71                 atmel,lcdcon2 = <0x80008002>;
  72                 atmel,guard-time = <9>;
  73                 atmel,lcd-wiring-mode = <1>;
  74
  75                 display-timings {
  76                         native-mode = <&timing0>;
  77                         timing0: timing0 {
  78                                 clock-frequency = <9000000>;
  79                                 hactive = <480>;
  80                                 vactive = <272>;
  81                                 hback-porch = <1>;
  82                                 hfront-porch = <1>;
  83                                 vback-porch = <40>;
  84                                 vfront-porch = <1>;
  85                                 hsync-len = <45>;
  86                                 vsync-len = <1>;
  87                         };
  88                 };
  89         };