Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/EFR32BG22C222F352GN32/GPIO_S/CMU_CLKOUT0ROUTE#0x0
CLKOUT0 port/pin select
CLKOUT0 port select register
CLKOUT0 pin select register
https://github.com/cmsis-svd/cmsis-svd-data