Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/SiM3_NRND/SIM3C167_B/RTC_0/LFOSCADJ#0x0
LFOSC Output Frequency Adjust
LFOSC Output Frequency Adjust.
https://github.com/cmsis-svd/cmsis-svd-data