On July 15, 2022 11:00:45 PM GMT+02:00, Reinhard Speyerer rspmn@arcor.de wrote:
the qcserial driver used in the usb-devices output above does not seem to be built from the mainline qcserial.c with your patch applied as USB interface 4 is ignored by the QCSERIAL_SWI layout.
Right, I will need to look into that then. I won't be able to access the devices for a couple of weeks, though. It might also just have been me no paying attention while testing. I'll get back to this.
To avoid potential side effects in case Sierra Wireless adds a vendor class USB interface 2 not intended to be used with qcserial.c it might be best to use a new QCSERIAL_SWI2 layout similar to what has been done in their MBPL drivers mentioned here https://forum.sierrawireless.com/t/rc7620-and-linux-driver/24308/ .
I'll have a look at this too.
Thanks, Frans