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nixos-hardware/hardkernel/odroid-hc4/default.nix

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{ config, lib, ... }:
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{
# Based on the config from https://www.armbian.com/odroid-hc4/
hardware.fancontrol = {
enable = lib.mkDefault true;
config = let
# According to https://www.armbian.com/odroid-hc4/ the FCFANS line should be removed on kernel 5.15.
kernelVersion = config.boot.kernelPackages.kernel.version;
needFcFans = lib.versions.majorMinor kernelVersion != "5.15";
in lib.mkDefault (''
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INTERVAL=10
DEVPATH=hwmon0=devices/virtual/thermal/thermal_zone0 hwmon2=devices/platform/pwm-fan
DEVNAME=hwmon0=cpu_thermal hwmon2=pwmfan
FCTEMPS=hwmon2/pwm1=hwmon0/temp1_input
'' + lib.optionalString needFcFans ''
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FCFANS= hwmon2/pwm1=hwmon2/fan1_input
'' + ''
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MINTEMP=hwmon2/pwm1=50
MAXTEMP=hwmon2/pwm1=60
MINSTART=hwmon2/pwm1=20
MINSTOP=hwmon2/pwm1=28
MINPWM=hwmon2/pwm1=0
MAXPWM=hwmon2/pwm1=255
'');
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};
# Linux 5.15 sometimes crash under heavy network usage
systemd.watchdog.runtimeTime = lib.mkDefault "1min";
hardware.deviceTree.filter = "meson-sm1-odroid-hc4.dtb";
}