NixOS on ARM/ODROID-HC4: Difference between revisions
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=== NixOS installation === | === NixOS installation === | ||
# First follow the [[NixOS_on_ARM#Installation|generic installation steps]] to get the | # First follow the [[NixOS_on_ARM#Installation|generic installation steps]] to get the latest stable installer image. | ||
# Uncompress the .zst file. One may use the <code>unzstd</code> command (equivalent to <code>zstd -d</code>) on supported machines. The zstd commands can be accessed from the <code>zstd</code> package. | # Uncompress the .zst file. One may use the <code>unzstd</code> command (equivalent to <code>zstd -d</code>) on supported machines. The zstd commands can be accessed from the <code>zstd</code> package. | ||
# Patch this image (.img file) with U-Boot for Odroid HC4. <syntaxhighlight lang="bash"> | # Patch this image (.img file) with U-Boot for Odroid HC4. <syntaxhighlight lang="bash"> | ||
Revision as of 19:51, 15 June 2022
| Hardkernel ODROID-HC4 | |
|---|---|
| Manufacturer | Hardkernel |
| Architecture | AArch64 |
| Bootloader | U-Boot |
| Boot options | microSD (SATA?) |
Status
Mostly working, but some manual steps needed to get it running.
U-boot support in NixPkgs is currently in review: NixPkgs Pull Request #101454
Board-specific installation notes
Petitboot removal
Petitboot is installed on the SPI memory of the Odroid HC4 from factory. To be able to load an upstreamed version of U-Boot without having to press a hardware button at each boot, you may remove it. Please proceed with caution, this will make Hardkernel images unbootable!
From the Petitboot, go for “Exit to shell” and enter these commands to remove Petitboot:
flash_eraseall /dev/mtd0
flash_eraseall /dev/mtd1
flash_eraseall /dev/mtd2
flash_eraseall /dev/mtd3
This will make your SPI flash memory empty and the device will now start from SD on next boot.
See this Odroid forum topic to restore Petitboot.
NixOS installation
- First follow the generic installation steps to get the latest stable installer image.
- Uncompress the .zst file. One may use the
unzstdcommand (equivalent tozstd -d) on supported machines. The zstd commands can be accessed from thezstdpackage. - Patch this image (.img file) with U-Boot for Odroid HC4.
# Clone content of samueldr's wip/odroidc4 branch, edit the defconfig file, and build git clone https://github.com/samueldr/nixpkgs --depth 1 -b wip/odroidc4 && cd nixpkgs test "$(uname)" '==' 'Darwin' && sed -i '' 's/defconfig = "odroid-c4_defconfig"/defconfig = "odroid-hc4_defconfig"/' pkgs/misc/uboot/default.nix || sed -i 's/defconfig = "odroid-c4_defconfig"/defconfig = "odroid-hc4_defconfig"/' pkgs/misc/uboot/default.nix nix-build -I "nixpkgs=$PWD" -A pkgsCross.aarch64-multiplatform.ubootOdroidC4 sudo dd if=result/u-boot.bin of=PATH/TO/nixos-sd-image-21.05.XXXX.XXXXXXXX-aarch64-linux.img conv=fsync,notrunc bs=512 seek=1
- Flash the modified SD image file (.img) to a microSD card. This will erase all the data on the card!
Known issues
Fan doesn't work by default
You need to use software fan control (via fancontrol) for this. Add the following to your configuration.nix:
# Based on the config from https://www.armbian.com/odroid-hc4/. Made MINTEMP and MAXTEMP a bit more relaxed so the fan doesn't run on idle.
hardware.fancontrol = {
enable = true;
config = ''
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
MINTEMP=hwmon2/pwm1=55
MAXTEMP=hwmon2/pwm1=65
MINSTART=hwmon2/pwm1=20
MINSTOP=hwmon2/pwm1=28
MINPWM=hwmon2/pwm1=0
MAXPWM=hwmon2/pwm1=255
'';
};