Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32GG11B/EFM32GG11B840F1024GM64/ADC1/SCANMASK#0x0
Scan Sequence Input Mask Register
Scan Sequence Input Mask
https://github.com/cmsis-svd/cmsis-svd-data