usb: serial: qcserial: add support for the Dell DW5821e module
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So this doesn't really match the Sierra layout in qcserial, where the QMI interface is documented as interface 8 (but perhaps we have other examples of that already).
Do you know what these serial ports are used for?
You know what, I kind of missed that. This Dell device is not based on Sierra Wireless, so using the Sierra layout is not a good idea. Let me try to confirm with the manufacturer the purpose of each interface.
Sounds good.
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Just based on the above, perhaps using option and matching on the vendor class, while blacklisting interface 1 would be more appropriate?
Being a Qualcomm based chipset, I believe qcserial would be more appropriate. I'll send an updated patch, including usb-devices output, once I have an explanation for all questions.
Note that we have other qualcomm based devices being handled by option already. The qcserial driver was intended for a special subset of Gobi modems with a particular interface layout and firmware loading requirements. So unless your device falls in any of those categories, option may still be preferred.
Thanks,
Johan
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