Hi Aleksander, I did backport the Linux-5.15 MHI driver and WWAN drivers to Linux-4.19 (My kernel) and it seems the control port interfaces were created after I loaded the wwan.ko & mhi_wwan_ctrl.ko drivers. I am expecting now that the ModemManager will be up. Let me try.
# ls -l /dev/wwan0* wwan0mbim0 wwan0qcdm0 wwan0qmi0 Thanks, SK On Tue, Feb 8, 2022 at 10:40 AM Senthil Kumaresan <sekumarej...@gmail.com> wrote: > 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 <sekumarej...@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 < >> aleksan...@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 >>> >>
