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Date:   Thu, 24 Dec 2020 15:59:01 +0100
From:   Pavel Machek <>
To:     Tony Lindgren <>
Cc:     Johan Hovold <>,,
        Greg Kroah-Hartman <>,
        Rob Herring <>,
        Alan Cox <>,
        Lee Jones <>, Jiri Slaby <>,
        Merlijn Wajer <>,
        Peter Hurley <>,
        Sebastian Reichel <>,,,,
Subject: Re: [PATCHv6 0/4] n_gsm serdev support and protocol driver for
 droid4 modem


> > My notes say:
> > 
> > /dev/motmdm1 -- basic support, calls, on/off                                    
> > /dev/motmdm3 -- send sms interface                                              
> > /dev/motmdm9 -- receive sms interface                                           
> >
> > (and gsmtty numbering is same)
> Yes I have not had a chance to look at these for several months now,
> but have the latest set in droid4-pending-v5.10 branch in my github
> tree.
> The gnss device is at /dev/gsmtty6, see the current droid4-agps tool
> to upload the almanac also on github. That's has turned out to be a
> pretty good gsm serdev test too :)

Thanks a lot for the info! Is it this one? . GPS worked for me even w/o
AGPS support, but I broke even that, so I need to fix that first.

> > For now I converted gnss driver to use serdev interface, and n_gsm to
> > provide it... Not yet finished but I believe I'm walking in the right
> > direction.
> Great, sounds good to me if you got things working with just serdev
> calls :) I'll try to take a look at this stuff again after I have
> the other pending droid4 issues out of the way like v5.12 charger
> and keyboard stuff.

Just ask for latest code :-). I still believe I'm going right
direction, but now I understand why you did it the way you did. Sound
code needs to listen on gsmtty1, with the data still being provided
for userspace.

Best regards,

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