OpenEmbedded "poky" with some sysmocom specific modifications. Mostly used only up to sysmocom release 201310, but the "pyro" branch is still used for 201705
The odu-gpiotool is a small script created by roh to selectively reset
individual peripherals of the system by the administrator. It originates
from ticket https://projects.sysmocom.de/ortelius/issues/655