[Gta04-owner] Polling CLCC error handling on Option modem (GTA04)

[Neil Jerram]

Denis Kenzior <denkenz at gmail.com> writes:

> You will never be able to
> hit any sort of power consumption targets with CLCC polling anyway.

I think we do still have another possible line of investigation here.
Neil Brown reported that the modem does generate NO CARRIER on one of
its serial ports - just not the one that is expected.  So perhaps that
can be understood and used, and then the CLCC polling could be switched
off.

Denis, I looked at the oFono code to try to see where CLCC polling is
enabled for an active call, and in fact I couldn't see (in
plugins/atmodem/voicecall.c, which I think is the relevant code) what
could cause oFono _not_ to do CLCC polling.  It looks unconditional
there - is that right?

Regards,
    Neil