111 lines
3.2 KiB
Plaintext
111 lines
3.2 KiB
Plaintext
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* ARM PrimeCell Color LCD Controller PL110/PL111
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See also Documentation/devicetree/bindings/arm/primecell.yaml
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Required properties:
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- compatible: must be one of:
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"arm,pl110", "arm,primecell"
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"arm,pl111", "arm,primecell"
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- reg: base address and size of the control registers block
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- interrupt-names: either the single entry "combined" representing a
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combined interrupt output (CLCDINTR), or the four entries
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"mbe", "vcomp", "lnbu", "fuf" representing the individual
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CLCDMBEINTR, CLCDVCOMPINTR, CLCDLNBUINTR, CLCDFUFINTR interrupts
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- interrupts: contains an interrupt specifier for each entry in
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interrupt-names
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- clock-names: should contain "clcdclk" and "apb_pclk"
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- clocks: contains phandle and clock specifier pairs for the entries
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in the clock-names property. See
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Documentation/devicetree/bindings/clock/clock-bindings.txt
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Optional properties:
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- memory-region: phandle to a node describing memory (see
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Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt)
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to be used for the framebuffer; if not present, the framebuffer
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may be located anywhere in the memory
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- max-memory-bandwidth: maximum bandwidth in bytes per second that the
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cell's memory interface can handle; if not present, the memory
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interface is fast enough to handle all possible video modes
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Required sub-nodes:
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- port: describes LCD panel signals, following the common binding
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for video transmitter interfaces; see
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Documentation/devicetree/bindings/media/video-interfaces.txt
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Deprecated properties:
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The port's endbpoint subnode had this, now deprecated property
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in the past. Drivers should be able to survive without it:
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- arm,pl11x,tft-r0g0b0-pads: an array of three 32-bit values,
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defining the way CLD pads are wired up; first value
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contains index of the "CLD" external pin (pad) used
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as R0 (first bit of the red component), second value
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index of the pad used as G0, third value index of the
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pad used as B0, see also "LCD panel signal multiplexing
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details" paragraphs in the PL110/PL111 Technical
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Reference Manuals; this implicitly defines available
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color modes, for example:
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- PL111 TFT 4:4:4 panel:
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arm,pl11x,tft-r0g0b0-pads = <4 15 20>;
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- PL110 TFT (1:)5:5:5 panel:
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arm,pl11x,tft-r0g0b0-pads = <1 7 13>;
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- PL111 TFT (1:)5:5:5 panel:
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arm,pl11x,tft-r0g0b0-pads = <3 11 19>;
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- PL111 TFT 5:6:5 panel:
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arm,pl11x,tft-r0g0b0-pads = <3 10 19>;
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- PL110 and PL111 TFT 8:8:8 panel:
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arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
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- PL110 and PL111 TFT 8:8:8 panel, R & B components swapped:
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arm,pl11x,tft-r0g0b0-pads = <16 8 0>;
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Example:
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clcd@10020000 {
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compatible = "arm,pl111", "arm,primecell";
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reg = <0x10020000 0x1000>;
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interrupt-names = "combined";
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interrupts = <0 44 4>;
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clocks = <&oscclk1>, <&oscclk2>;
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clock-names = "clcdclk", "apb_pclk";
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max-memory-bandwidth = <94371840>; /* Bps, 1024x768@60 16bpp */
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port {
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clcd_pads: endpoint {
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remote-endpoint = <&clcd_panel>;
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};
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};
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};
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panel {
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compatible = "panel-dpi";
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port {
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clcd_panel: endpoint {
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remote-endpoint = <&clcd_pads>;
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};
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};
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panel-timing {
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clock-frequency = <25175000>;
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hactive = <640>;
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hback-porch = <40>;
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hfront-porch = <24>;
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hsync-len = <96>;
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vactive = <480>;
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vback-porch = <32>;
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vfront-porch = <11>;
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vsync-len = <2>;
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};
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};
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