Kernel Build Instructions

[pectec]

Hello everybody!

I got plans to implement an I2C to SPI kernel module, with the end goal of exposing the Pinedio Pinephone backplate as an SPI device and hopefully running meshtasticd using the standard SX1262 module.

I am currently stuck at the beginning stage of building the kernel such that I can begin development on this project.
Tried following the Arch Wiki but I fail at the step of installing devtools which on ARM doesn't seem to have pkgctl included. Downloaded the Kernel 6.9.3 but won't build sadly.
Also tried cloning this repository and making a guess on what to do with the ./build.sh script, to no surprise I don't know what I am doing here.

./build.sh --arch aarch64 --pkg device-pine64-pinephone --repo pine64
...
==> ERROR: No chroot dir defined, or invalid path '/home/alarm/work/pinedio/Pine64-Arch/./chroot-aarch64'
Error: Unable to build package in PKGBUILDS/pine64/device-pine64-pinephone

Caused by:
    makechrootpkg failed

I am trying to build on the pinephone itself, on following uname:
Linux mtt 6.7.7-1-danctnix #1 SMP PREEMPT_DYNAMIC Wed Mar 6 16:53:44 UTC 2024 aarch64 GNU/Linux

If anyone got any pointers on how to proceed, I would be thankful.
Got to be said tough, good distro so far!

[pectec]

I found out by playing around, I'll document my findings for the OG PinePhone in case somebody wants to build the kernel.

1. Check out this repository
2. Navigate to PKGBUILDS/pine64/linux-megi/pkg/linux-megi
3. Install dependencies: sudo pacman -Sy xmlto docbook-xsl inetutils bc dtc cpio. List is not comprehensive, but the next step will inform you of missing deps.
4. Call makepkg -Ac
5. Done, easy.

Now if you just want to checkout the kernel headers, the above revealed that you can just install the package linux-megi-headers.

[Danct12]

You can skip step 3, just run makepkg -s. You also don't need the c parm either unless you want to clean the build directory after build success/failure.