Merge #595
595: raspberry-pi/4: Add touch support for official 7" display. r=Mic92 a=frederictobiasc Co-authored-by: Frédéric Christ <frederic.christ@secunet.com>
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raspberry-pi/4/touch-ft5406.nix
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raspberry-pi/4/touch-ft5406.nix
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{ config, lib, ... }:
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let
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cfg = config.hardware.raspberry-pi."4".touch-ft5406;
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in
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{
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options.hardware = {
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raspberry-pi."4".touch-ft5406 = {
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enable = lib.mkEnableOption ''
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Enable the touch controller of the official Raspberry Pi touch diplay.
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The overlay is taken from the official Raspberry Pi Linux fork, and
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the `compatible` field is updated to match the target device tree.
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https://github.com/raspberrypi/linux/blob/14b35093ca68bf2c81bbc90aace5007142b40b40/arch/arm/boot/dts/overlays/rpi-ft5406-overlay.dts
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For more information about the touch display, please refer to:
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https://www.raspberrypi.com/documentation/accessories/display.html
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'';
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};
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};
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config = lib.mkIf cfg.enable {
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hardware.deviceTree = {
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overlays = [
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{
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name = "rpi-ft5406-overlay";
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dtsText = ''
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/dts-v1/;
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/plugin/;
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/ {
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compatible = "brcm,bcm2711";
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fragment@0 {
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target-path = "/soc/firmware";
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__overlay__ {
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ts: touchscreen {
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compatible = "raspberrypi,firmware-ts";
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touchscreen-size-x = <800>;
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touchscreen-size-y = <480>;
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};
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};
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};
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__overrides__ {
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touchscreen-size-x = <&ts>,"touchscreen-size-x:0";
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touchscreen-size-y = <&ts>,"touchscreen-size-y:0";
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touchscreen-inverted-x = <&ts>,"touchscreen-inverted-x?";
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touchscreen-inverted-y = <&ts>,"touchscreen-inverted-y?";
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touchscreen-swapped-x-y = <&ts>,"touchscreen-swapped-x-y?";
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};
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};
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'';
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}
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];
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};
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};
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}
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