Which systemd unit initializes the ttyOX symlinks to UARTs (/dev/ttyO1,...) during boot? In the 2017-01-15 seeed-iot image.
I wish to start my service which expects those links to be there, so I'd need to pass to it the correct "After" dependency. Until now I thought "capemgr" service created the links, but apparently it doesn't. Maybe udev then?