Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series0/EZR32LG/EZR32LG330F128R69/UART1/ROUTE#0x0
LOCATION=LOC0
I/O Routing Register
RX Pin Enable
TX Pin Enable
CS Pin Enable
CLK Pin Enable
I/O Location
0 (LOC0): Location 0
1 (LOC1): Location 1
2 (LOC2): Location 2
3 (LOC3): Location 3
4 (LOC4): Location 4
5 (LOC5): Location 5
https://github.com/cmsis-svd/cmsis-svd-data