[PATCH 0/4] RFC: ath79: add support for Mikrotik RB91xG

[Bjørn Mork]

Koen Vandeputte <koen.vandeputte at citymesh.com> writes:

> I've fixed most of the open stuff, with the exception of using a PCIe
> device in the slot. (checking currently what is wrong there)

Are you sure that's supported?  This is a slot intended only for LTE
modems, isn't it?

Looking at the picture at https://i.mt.lv/cdn/rb_images/884_hi_res.png I
can't see anything connecting to the PETn0/PETp0 pair.  There are
connections to the PERn0/PERp0 pair, but the traces do not look like
they're laid out for a PCIe differential pair. I suspect that's made for
some specific modem, using those pins for a debug UART. Like the Quectel
EC25:
https://forums.quectel.com/t/issue-in-interfacing-unilec-board-with-quectel-ec-25-e-mini-pcie-card/3057/5




Bjørn