[PATCH 0/1] Workaround for rut955 modem initialization

Daniel Golle daniel at makrotopia.org
Mon Jun 28 15:38:04 PDT 2021

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.



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