Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32GG12B/EFM32GG12B510F1024GM64/PDM/ROUTEPEN#0x0
I/O LOCATION Enable Register
DAT0 I/O Enable
DAT1 I/O Enable
DAT2 I/O Enable
DAT3 I/O Enable
CLK I/O Enable
https://github.com/cmsis-svd/cmsis-svd-data