We are just kicking off a new design with a nRF54L15. We would like to use the GRTC as a pseudo real-time-clock. We know that it retains its value through a reset and in system OFF state, so it should do the job for our purposes and save the cost and need for an external real-time-clock. However, I read in section 2.2 of this Boot-up description that the GRTC is used as the system clock for Zephyr and gets initialized on startup. Are there any plans to provide an option to run the Zephyr system clock off a different source? Or whether we can do that without a lot of work? Or perhaps Zephyr does not reset the counter on power up and we can still use it as a continuous counter through resets? Looking to see if anyone else has used the GRTC as a RTC, or if anyone has thoughts on options, thanks.
