Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/NXP Semiconductors/QN908XC/RTC/CAL#0x0
DIR=FORWARD
RTC calibration register
RTC calibration ppm value the precision is 1 ppm.
RTC calibration direction indicator
0 (FORWARD): forward calibrate
1 (BACKWARD): backward calibrate
https://github.com/cmsis-svd/cmsis-svd-data