EM7455 not recognised anymore after usbmode change

IoT Modules MC/EM Series
22

The process is documented here:
https://docs.kernel.org/process/submitting-patches.html

Yes, I realize that this is a heavy process to learn just for two trivial one-line patches. But it’s an easy way to start. And I try to push people there so they see that there is nothing magic to it. If you find a bug in the kernel or some driver later, then you can just fix it and submit a patch.

And that’s very rewarding. To all of us

23

The script functionality is built into qmicli (from libqmi) now. And despite being a QMI tool, this can also be used over MBIM with modems supporting the QMUX MBIM service. E.g:

root@miraculix:/tmp# qmicli -p --device-open-mbim --device /dev/cdc-wdm0  --dms-swi-get-usb-composition 
[/dev/cdc-wdm0] Successfully retrieved USB compositions:
            USB composition 6: DM, NMEA, AT, QMI
        [*] USB composition 8: DM, NMEA, AT, MBIM
            USB composition 9: MBIM

And there’s a --dms-swi-set-usb-composition for switching compostions.

1 Like
24

I am closing here now.

Many thanks to @jyijyi and @dl5162 for helping and clarifying!