I have a modem that can forward GPS time to a TCP socket, these are GGPA sentences, I would like to get this information to chronyd so I can use chronyd as the single source of time sync in the system.
My first try was to add

refclock SOCK /tmp/gps.sock refid GPS precision 1e-1 poll 3

To the config, then use a simple program to create that socket, and forward the time to it.
However I do not see any evidence that chronyd is pulling time from this socket? (i’ve restarted, called makestep etc etc) What I am getting wrong?