nicklasfrahm

I have an R5S, how would I create a new board configuration? I noticed that there is currently no bootconfig in the upstream u-boot repository. Would that be an issue?
 
I read through some of the developer documentation, but I can't find a section that explains how to go about adding support for a new board.

I have some familiarity with compilers and the likes, but I have never built a kernel or OS images by myself. I would however love to contribute.

I spent a day on this. Made some progress and some regression  I had a working nand-sata-install, could transfer to internal eMMC and boot from it but with latest images its not working anymore ... after going closer to @Cornelius patch.
 
u-boot button detection to switch booting from SD card is very unstable. It often hangs, so its some work to be done here ... Test image and a build PR: https://github.com/armbian/build/pull/4247 

Pick something you understand well enough or start learning by reading this forum, documentation, ...
https://forum.armbian.com/staffapplications/

Yeah that is one of the sections that are still missing and nobody took the challenge yet to make a write-up. However you can dig through old PRs that added support for a board to get an idea where things got added or adjusted.
Examples:
https://github.com/armbian/build/pull/3628
https://github.com/armbian/build/pull/3770