The Quectel EG120K-EA (LTE Cat.12) reports USB ID 2c7c:030b and exposes
its QMI/RMNET function on a vendor-specific ff/ff/ff interface. The same
product ID is already known to the option driver as EM060K, which claims
the serial interfaces, but without a qmi_wwan entry the data interface is
left unbound and no cdc-wdm node appears.
Add the device using QMI_MATCH_FF_FF_FF so the DTR quirk is applied.
Tested on a GL.iNet GL-X2000, where the modem enumerates at SuperSpeed and
now brings up cdc-wdm0 and wwan0. A data session over MEO (268-06) was
verified end to end.
Accepted upstream via netdev/net, so this is carried as a backport and can
be dropped once the kernel is bumped to 7.3 or later. Inserting it ahead of
the MeigLink hack shifts that patch's offsets, so
780-usb-net-MeigLink_modem_support.patch is refreshed as well.
Link: https://patch.msgid.link/20260921093426.2870266-1-gilbertorconde@gmail.com
Signed-off-by: Gilberto Conde <gilbertorconde@gmail.com>
Gilberto Conde
23bebd5c32