Modem Manager bring up

[Senthil Kumaresan]

Hi Aleksander,

Thanks for your support. I am trying to backport the WWAN system for my
kernel.
Just a thought.  Is there any possibility that we make the modem manager
know that there is no WWAN subsystem rather than use "/dev/mhi0_QMI"  to
detect the modem?

Thanks,
Senthil

On Mon, Feb 7, 2022 at 2:49 PM Senthil Kumaresan <sekumarejobs at gmail.com>
wrote:

> Hi Aleksander,
>
> Ok. Anyway, I am backporting the last mhi driver from Linux 5.15 to 4.19.
> I have compiled the driver successfully and loaded it to the target.
> The /dev/wwan0qmi0 is not there, because I did not take the
> drivers/net/wwan directory. I need to take them and rebuild and see whether
> the ModemManager is coming up or not.
>
> Thanks,
> Senthil
>
> On Mon, Feb 7, 2022 at 2:42 PM Aleksander Morgado <
> aleksander at aleksander.es> wrote:
>
>> Hey!
>>
>>
>>> I did use the following driver that you have shared earlier. Is that
>>> below not the correct one ? I have copied the below into my kernel which is
>>> 4.19.
>>>
>>> ttps://github.com/kristrev/mhi-for-kernel-4.14
>>> <https://github.com/kristrev/mhi-for-kernel-4.14>
>>>
>>>
>> Oh, really? Does this mean that 4.14 backport doesn't have the WWAN
>> subsystem support? I truly believed it would have had it, or so I was told
>> by some dev team that had tested it. Sorry if that's not the case :/ If so,
>> it would mean the backport from that repo isn't usable for MM. I have my
>> own patch-by-patch backport to 5.4 including the wwan subsystem, but
>> haven't tried to go back further yet, not sure how complex that would be to
>> include everything for 4.14.
>>
>> Not sure if I'm missing something, but I definitely wouldn't have
>> expected the mhi0_QMI port name.
>>
>> --
>> Aleksander
>> https://aleksander.es
>>
>
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