117 lines
3.6 KiB
Nix
117 lines
3.6 KiB
Nix
{ config, lib, ... }:
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let
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cfg = config.hardware.raspberry-pi."4".leds;
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mkDisableOption = name: lib.mkOption {
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default = false;
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example = true;
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description = "Whether to disable ${name}.";
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type = lib.types.bool;
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};
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in
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{
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options.hardware = {
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raspberry-pi."4".leds = {
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eth.disable = mkDisableOption ''ethernet LEDs.'';
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act.disable = mkDisableOption ''activity LED.'';
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pwr.disable = mkDisableOption ''power LED.'';
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};
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};
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# Adapted from: https://gist.github.com/SFrijters/206d2c09656affb04284f076c75a1969
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config = lib.mkMerge [
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(lib.mkIf cfg.eth.disable {
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hardware.deviceTree = {
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overlays = [
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# https://github.com/raspberrypi/firmware/blob/master/boot/overlays/README
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# eth_led0 Set mode of LED0 - amber on Pi3B+ (default "1"),
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# green on Pi4 (default "0").
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# The legal values are:
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#
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# Pi4
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#
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# 0=Speed/Activity 1=Speed
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# 2=Flash activity 3=FDX
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# 4=Off 5=On
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# 6=Alt 7=Speed/Flash
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# 8=Link 9=Activity
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#
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# Debugging:
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# $ hexdump /proc/device-tree/scb/ethernet@7d580000/mdio@e14/ethernet-phy@1/led-modes
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{
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name = "disable-eth-leds";
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filter = "*rpi-4-b*";
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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 = "raspberrypi,4-model-b";
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fragment@0 {
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target = <&phy1>;
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__overlay__ {
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led-modes = <0x04 0x04>;
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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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(lib.mkIf cfg.act.disable {
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hardware.deviceTree = {
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overlays = [
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# Debugging:
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# $ hexdump /proc/device-tree/leds/led-act/gpios
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# $ cat /proc/device-tree/leds/led-act/linux,default-trigger
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{
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name = "disable-act-led";
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filter = "*rpi-4-b*";
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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 = "raspberrypi,4-model-b";
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fragment@0 {
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target = <&act_led>;
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__overlay__ {
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gpios = <&gpio 42 0>; /* first two values copied from bcm2711-rpi-4-b.dts */
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linux,default-trigger = "none";
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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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(lib.mkIf cfg.pwr.disable {
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hardware.deviceTree = {
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overlays = [
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# Debugging:
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# $ hexdump /proc/device-tree/leds/led-pwr/gpios
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# $ cat /proc/device-tree/leds/led-pwr/linux,default-trigger
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{
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name = "disable-pwr-led";
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filter = "*rpi-4-b*";
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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 = "raspberrypi,4-model-b";
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fragment@0 {
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target = <&pwr_led>;
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__overlay__ {
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gpios = <&expgpio 2 0>; /* first two values copied from bcm2711-rpi-4-b.dts */
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linux,default-trigger = "default-on";
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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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];
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}
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