On Donnerstag, 24. Juni 2021 09:28:59 CEST Johan Hovold wrote:
> [ +CC: Daniele and Bjørn ]
> 
> On Fri, Jun 11, 2021 at 03:58:41PM +0200, Stefan Brüns wrote:
> > The devices exposes two different interface compositions:
> > - QDL mode, single interface
> > - MBIM mode, MBIM class compliant plus AT/DM(/ADB)
> > 
> > Current firmware versions (up to 01.07.19) do not expose an NMEA port.
> 
> We already have at least one SDX55 based modem (FN980) supported by the
> option driver. Any particular reason why you chose to add it to qcserial
> instead of option?
> 
Support for qualcomm based modems are spread over option and qcserial. All 
other Sierra devices are supported by qcserial.
 
> Note that the FN980 also needs the ZLP flag set in QDL (flashing) mode,
> I'd assume this one needs it too.

It depends if you implement the Firehose protocol in accordance to the 
specification or not. 80-NG319-1 (Firehose specification) explicitly states to 
pad any XML command packet which is an exact multiple of 512 bytes with an 
extra newline or other whitespace character.

Regards,

Stefan

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