I recently enabled power management in my code base by adding these two oiptions to my prj.conf:
CONFIG_PM_DEVICE=yCONFIG_PM_DEVICE_RUNTIME=yThe code runs on an nRF5340 MCU with a LittleFS instance in an external MX25R64 QSPI flash. It all worked fine until I enabled the two options above in prj.conf, now I get this error each time the MCU starts:
<err> qspi_nor: pm_device_runtime_put failed: -16It appears that things continue to work normally though, but I've yet to run extensive read/write tests on the external flash and the above error is a bit concerning. I also have
CONFIG_NORDIC_QSPI_NOR_XIP=y in my prj.conf, which (among other things) is supposed to keep the external flash from sleeping if I understood correctly (I need this for various reasons).
Does anybody know how concerned I should be about this error? Thank you.