Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32MG1P/EFR32MG1P233F256IM48/GPIO/EM4WUEN#0x0
EM4 Wake Up Enable Register
EM4 Wake Up Enable
https://github.com/cmsis-svd/cmsis-svd-data