hi, I'd just like to share some resources I stumbled into:
BigTree tech CB1 is running on a H616
https://www.armbian.com/bigtreetech-cb1/
apparently they are using a 5.16 kernel as a base
https://github.com/bigtreetech/CB1-Kernel
https://github.com/bigtreetech/CB1
the commits and diffs could provide some hints on fixes, and there are apparently docs which may be unique