netdev - Re: [PATCH net-next] net: wwan: iosm: Enable M.2 7360 WWAN card support

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Date:   Mon, 15 Aug 2022 18:30:52 +0700
From:   Florian Klink <flokli@...kli.de>
To:     "Kumar, M Chetan" <m.chetan.kumar@...ux.intel.com>
Cc:     Jan Kiszka <jan.kiszka@...mens.com>, netdev@...r.kernel.org,
        kuba@...nel.org, davem@...emloft.net, johannes@...solutions.net,
        ryazanov.s.a@...il.com, loic.poulain@...aro.org,
        krishna.c.sudi@...el.com, linuxwwan@...el.com
Subject: Re: [PATCH net-next] net: wwan: iosm: Enable M.2 7360 WWAN card
 support

Hey,

On 22-02-10 21:46:21, Kumar, M Chetan wrote:
>On 2/10/2022 9:08 PM, Jan Kiszka wrote:
>>On 10.02.22 16:34, M Chetan Kumar wrote:
>>>This patch enables Intel M.2 7360 WWAN card support on
>>>IOSM Driver.
>>>[…]
>>
>>Hey, cool! I'll be happy to try that out soon. Any special userland
>>changes required, or will it "just work" with sufficiently recent
>>ModemManager or whatever?
>
>It need some changes at ModemManager side.

There's some people trying out this patchset in
https://github.com/xmm7360/xmm7360-pci/issues/31.

With the changes merged in, apparently the modem still reports a "SIM
not inserted" error.

https://github.com/xmm7360/xmm7360-pci/issues/31#issuecomment-1181936111
suggests it might be the "FCC lock" feature, but even then, it doesn't
seem to work.

There's now a ModemManager issue at
https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/612,
which is probably the more appropriate way to discuss this, rather than
another out-of-tree kernel driver.

If you have any more insights on what's missing to get this to work in
NetworkManager/ModemManager, any comment would be appreciated.

Thanks!
Florian