Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/EFR32BG22C222F352GM40/GPIO_NS/MODEM_DOUTROUTE#0x0
DOUT port/pin select
DOUT port select register
DOUT pin select register
https://github.com/cmsis-svd/cmsis-svd-data