arm,pl11x.txt

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    1 * ARM PrimeCell Color LCD Controller PL110/PL111
    2 
    3 See also Documentation/devicetree/bindings/arm/primecell.yaml
    4 
    5 Required properties:
    6 
    7 - compatible: must be one of:
    8         "arm,pl110", "arm,primecell"
    9         "arm,pl111", "arm,primecell"
   10 
   11 - reg: base address and size of the control registers block
   12 
   13 - interrupt-names: either the single entry "combined" representing a
   14         combined interrupt output (CLCDINTR), or the four entries
   15         "mbe", "vcomp", "lnbu", "fuf" representing the individual
   16         CLCDMBEINTR, CLCDVCOMPINTR, CLCDLNBUINTR, CLCDFUFINTR interrupts
   17 
   18 - interrupts: contains an interrupt specifier for each entry in
   19         interrupt-names
   20 
   21 - clock-names: should contain "clcdclk" and "apb_pclk"
   22 
   23 - clocks: contains phandle and clock specifier pairs for the entries
   24         in the clock-names property. See
   25         Documentation/devicetree/bindings/clock/clock-bindings.txt
   26 
   27 Optional properties:
   28 
   29 - memory-region: phandle to a node describing memory (see
   30         Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt)
   31         to be used for the framebuffer; if not present, the framebuffer
   32         may be located anywhere in the memory
   33 
   34 - max-memory-bandwidth: maximum bandwidth in bytes per second that the
   35         cell's memory interface can handle; if not present, the memory
   36         interface is fast enough to handle all possible video modes
   37 
   38 Required sub-nodes:
   39 
   40 - port: describes LCD panel signals, following the common binding
   41         for video transmitter interfaces; see
   42         Documentation/devicetree/bindings/media/video-interfaces.txt
   43 
   44 Deprecated properties:
   45         The port's endbpoint subnode had this, now deprecated property
   46         in the past. Drivers should be able to survive without it:
   47 
   48         - arm,pl11x,tft-r0g0b0-pads: an array of three 32-bit values,
   49                 defining the way CLD pads are wired up; first value
   50                 contains index of the "CLD" external pin (pad) used
   51                 as R0 (first bit of the red component), second value
   52                 index of the pad used as G0, third value index of the
   53                 pad used as B0, see also "LCD panel signal multiplexing
   54                 details" paragraphs in the PL110/PL111 Technical
   55                 Reference Manuals; this implicitly defines available
   56                 color modes, for example:
   57                 - PL111 TFT 4:4:4 panel:
   58                         arm,pl11x,tft-r0g0b0-pads = <4 15 20>;
   59                 - PL110 TFT (1:)5:5:5 panel:
   60                         arm,pl11x,tft-r0g0b0-pads = <1 7 13>;
   61                 - PL111 TFT (1:)5:5:5 panel:
   62                         arm,pl11x,tft-r0g0b0-pads = <3 11 19>;
   63                 - PL111 TFT 5:6:5 panel:
   64                         arm,pl11x,tft-r0g0b0-pads = <3 10 19>;
   65                 - PL110 and PL111 TFT 8:8:8 panel:
   66                         arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
   67                 - PL110 and PL111 TFT 8:8:8 panel, R & B components swapped:
   68                         arm,pl11x,tft-r0g0b0-pads = <16 8 0>;
   69 
   70 
   71 Example:
   72 
   73         clcd@10020000 {
   74                 compatible = "arm,pl111", "arm,primecell";
   75                 reg = <0x10020000 0x1000>;
   76                 interrupt-names = "combined";
   77                 interrupts = <0 44 4>;
   78                 clocks = <&oscclk1>, <&oscclk2>;
   79                 clock-names = "clcdclk", "apb_pclk";
   80                 max-memory-bandwidth = <94371840>; /* Bps, 1024x768@60 16bpp */
   81 
   82                 port {
   83                         clcd_pads: endpoint {
   84                                 remote-endpoint = <&clcd_panel>;
   85                         };
   86                 };
   87 
   88         };
   89 
   90         panel {
   91                 compatible = "panel-dpi";
   92 
   93                 port {
   94                         clcd_panel: endpoint {
   95                                 remote-endpoint = <&clcd_pads>;
   96                         };
   97                 };
   98 
   99                 panel-timing {
  100                         clock-frequency = <25175000>;
  101                         hactive = <640>;
  102                         hback-porch = <40>;
  103                         hfront-porch = <24>;
  104                         hsync-len = <96>;
  105                         vactive = <480>;
  106                         vback-porch = <32>;
  107                         vfront-porch = <11>;
  108                         vsync-len = <2>;
  109                 };
  110         };

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sys/contrib/device-tree/Bindings/display/arm,pl11x.txt