Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series0/EZR32LG/EZR32LG230F256R63/DAC0/OPAOFFSET#0x0
Operational Amplifier Offset Register
OPA2 Offset Configuration Value
https://github.com/cmsis-svd/cmsis-svd-data