From a742fe3a04105756d6a700ef1e885b326b7e57cd Mon Sep 17 00:00:00 2001 From: Felix Buehler Date: Tue, 14 Nov 2023 20:48:59 +0100 Subject: [PATCH] raspberry-pi/4: add led disable overlay --- raspberry-pi/4/default.nix | 1 + raspberry-pi/4/leds.nix | 116 +++++++++++++++++++++++++++++++++++++ 2 files changed, 117 insertions(+) create mode 100644 raspberry-pi/4/leds.nix diff --git a/raspberry-pi/4/default.nix b/raspberry-pi/4/default.nix index 1c55265..41d065a 100644 --- a/raspberry-pi/4/default.nix +++ b/raspberry-pi/4/default.nix @@ -8,6 +8,7 @@ ./digi-amp-plus.nix ./dwc2.nix ./i2c.nix + ./leds.nix ./modesetting.nix ./pkgs-overlays.nix ./poe-hat.nix diff --git a/raspberry-pi/4/leds.nix b/raspberry-pi/4/leds.nix new file mode 100644 index 0000000..1f2404d --- /dev/null +++ b/raspberry-pi/4/leds.nix @@ -0,0 +1,116 @@ +{ config, lib, ... }: + +let + cfg = config.hardware.raspberry-pi."4".leds; +in +{ + options.hardware = { + raspberry-pi."4".leds = { + disable-eth = lib.mkEnableOption '' + disable ethernet LEDs. + ''; + disable-act = lib.mkEnableOption '' + disable activity LED. + ''; + disable-pwr = lib.mkEnableOption '' + disable power LED. + ''; + }; + }; + + # Adapted from: https://gist.github.com/SFrijters/206d2c09656affb04284f076c75a1969 + config = lib.mkMerge [ + (lib.mkIf cfg.disable-eth { + hardware.deviceTree = { + overlays = [ + # https://github.com/raspberrypi/firmware/blob/master/boot/overlays/README + # eth_led0 Set mode of LED0 - amber on Pi3B+ (default "1"), + # green on Pi4 (default "0"). + # The legal values are: + # + # Pi4 + # + # 0=Speed/Activity 1=Speed + # 2=Flash activity 3=FDX + # 4=Off 5=On + # 6=Alt 7=Speed/Flash + # 8=Link 9=Activity + # + # Debugging: + # $ hexdump /proc/device-tree/scb/ethernet@7d580000/mdio@e14/ethernet-phy@1/led-modes + { + name = "disable-eth-leds"; + filter = "*rpi-4-b*"; + dtsText = '' + /dts-v1/; + /plugin/; + /{ + compatible = "raspberrypi,4-model-b"; + fragment@0 { + target = <&phy1>; + __overlay__ { + led-modes = <0x04 0x04>; + }; + }; + }; + ''; + } + ]; + }; + }) + (lib.mkIf cfg.disable-act { + hardware.deviceTree = { + overlays = [ + # Debugging: + # $ hexdump /proc/device-tree/leds/led-act/gpios + # $ cat /proc/device-tree/leds/led-act/linux,default-trigger + { + name = "disable-act-led"; + filter = "*rpi-4-b*"; + dtsText = '' + /dts-v1/; + /plugin/; + /{ + compatible = "raspberrypi,4-model-b"; + fragment@0 { + target = <&act_led>; + __overlay__ { + gpios = <&gpio 42 0>; /* first two values copied from bcm2711-rpi-4-b.dts */ + linux,default-trigger = "none"; + }; + }; + }; + ''; + } + ]; + }; + }) + (lib.mkIf cfg.disable-pwr { + hardware.deviceTree = { + overlays = [ + # Debugging: + # $ hexdump /proc/device-tree/leds/led-pwr/gpios + # $ cat /proc/device-tree/leds/led-pwr/linux,default-trigger + { + name = "disable-pwr-led"; + filter = "*rpi-4-b*"; + dtsText = '' + /dts-v1/; + /plugin/; + /{ + compatible = "raspberrypi,4-model-b"; + fragment@0 { + target = <&pwr_led>; + __overlay__ { + gpios = <&expgpio 2 0>; /* first two values copied from bcm2711-rpi-4-b.dts */ + linux,default-trigger = "default-on"; + }; + }; + }; + ''; + } + ]; + }; + }) + ]; +}