Where to look . . . lspci does not return a result. Should I see a
device in dmesg ? Nothing so far.
It's attached via SDIO not PCI so you wouldn't expect it to be visible
via a tool like lspci.
Also there's a completely different r8723cs driver that is not
upstream, I think that the r8723bs driver could be made to support the
CS variant but no one has actually done that work that I'm aware of. I
took a little bit of a poke the other day at the published driver but
it was purely investigatory.
Finally as Dennis mentioned there probably needs to be the device tree
bits added. The issue with the Pine64 is that the WiFi/BT module is
optional so it should probably be added as an overlay, again someone
needs to do the work.
So sadly it's not a simple or quick fix. I kind of want to take a look
at the driver side of things as it's the same module in the original
Pinebook, but also the PinePhone and PineTab but I have little time to
spare and a lot of things to work upon, I'm also by no means a WiFi
driver expert.
Peter