raiden00pl opened a new pull request, #19131:
URL: https://github.com/apache/nuttx/pull/19131
## Summary
- arch/nrf91: convert GNSS UTC time with timegm() not mktime()
The GNSS datetime reported by the modem is UTC. mktime() interprets the
broken-down time as local time, so a configured timezone would skew the
reported epoch. Use timegm() to convert it directly as UTC
- arch/nrf91: defer GNSS start until the modem is GNSS-capable
When the GNSS sensor is opened before the LTE stack has powered the modem
on, the modem is not yet in a GNSS-capable functional mode. Instead of
failing the activate with -EACCES, remember the request (priv->pending)
and let the GNSS thread poll the modem functional mode (AT+CFUN?) and
start GNSS once it becomes GNSS-capable. The LTE stack keeps ownership of
modem power.
Extract the configure/start sequence into nrf91_gnss_start() so it can be
used both from nrf91_gnss_enable() and from the thread's CFUN poll
## Impact
Improve reliability for applications with simultaneous LTE and GNSS
## Testing
thingy91 with lwm2m and GNSS
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