[PATCH 0/1] Workaround for rut955 modem initialization

[Daniel Golle]

On Mon, Jun 28, 2021 at 02:19:11PM +0200, John Crispin wrote:
> 
> On 28.06.21 13:56, Ontje.Luensdorf at dlr.de wrote:
> > This will probably affect all other modems and we are not sure if this may cause
> > side-effects on other devices.
> 
> 
> As similar problem can be observed when looking at swconfig. some switches
> need a reset, others do not. for this purpose an "option reset 0/1" was
> introduced in uci. In this case maybe "modem_reset" might be a good option.

This particular device (Teltonika RUT955) got a dedicated reset line for
the USB-connected internal Quectel EC-25 modem available as GPIO which
could be toggled on boot if needed (in user-space or by wiring up
device-tree magic doing that).

That's more reliable than using QMI to trigger the reset, and also more
generic in terms of people not even using 'uqmi' on that device.


Cheers


Daniel