Thanks for your time and reply, userid0.
Can you tell me what are the reasons the drivers are not in the kernel?
I'd say that would be an advantage for both Digi and their customers, but I don't know what you know
FWIW, I was pretty disappointed when I found out I need an (out of tree) driver to get the etherlite working. The fact that it even doesn't compile is an unfortunate acknowledgement of the trouble out-of-tree drivers give.
Of course I should have just bought a device which doesn't require a driver, but that's too late now. Before you ask, it is too late to return it too.