Cinterion MV31-W modem support

[Loic Poulain]

On Tue, 3 Aug 2021 at 17:13, ROSTANSKI Tomasz
<tomasz.rostanski at thalesgroup.com> wrote:
>
> Hi,
>
> The patch works. No QMI is being probed.
> I think I spotted the reason why not only cinterion module is considered appropriate for the modem.
> After executing the:
> mmcli --report-kernel-event="action=add,subsystem=wwan,name=wwan0mbim0"
>
> we can see:
>
> [2940]: <debug> [base-manager] kernel event reported:
> [2940]: <debug> [base-manager]   action:    add
> [2940]: <debug> [base-manager]   subsystem: wwan
> [2940]: <debug> [base-manager]   name:      wwan0mbim0
> [2940]: <debug> [base-manager]   uid:       n/a
> [2940]: <debug> [wwan0mbim0] preloading contents and properties...
> [2940]: <debug> [wwan0mbim0] sysfs path: /sys/devices/platform/soc at 0/884057000000.pci/pci0002:57/0002:57:00.0/0002:58:00.0/mhi0/wwan/wwan0/wwan0mbim0
> [2940]: <debug> [wwan0mbim0] port contents loaded:
> [2940]: <debug> [wwan0mbim0]   bus: pci
> [2940]: <debug> [wwan0mbim0]   device: /sys/devices/platform/soc at 0/884057000000.pci/pci0002:57/0002:57:00.0
> [2940]: <debug> [wwan0mbim0]   subsystems: wwan, mhi, pci
> [2940]: <debug> [wwan0mbim0]   drivers: mhi-pci-generic, pcieport
> [2940]: <debug> [wwan0mbim0]   vendor: 177d
> [2940]: <debug> [wwan0mbim0]   product: a22d
> [2940]: <debug> [wwan0mbim0]   revision: 0002
> [2940]: <debug> [wwan0mbim0]   ID_VENDOR_ID: 0x177d
> [2940]: <debug> [wwan0mbim0]   ID_MODEL_ID: 0xa22d
> [2940]: <debug> [wwan0mbim0]   ID_REVISION: 0x0002
>
> The detected vendor id is 0x177d:a22d is a PCI bridge:
> 0002:57:00.0 PCI bridge: Cavium, Inc. Device a22d (rev 02) (prog-if 00 [Normal decode])
> While the modem is:
> 0002:58:00.0 Wireless controller [0d40]: Thomson-CSF/TTM Device 00b3
> (Thomson-CSF is former name of Thales)

I observe quite the same on my side, looks like the PCI IDs are
retrieved from the parent instead of the device. It does not happen
with udev mechanism though. Should be fixed in kernel-generic I
assume...

Regards,
Loic