Due to a problem in the SoC EDS software version 15.1 and later, routing your Arria® 10 HPS UART to Shared I/O can cause u-boot to halt if if Early I/O is enabled.
To work around this problem in the SoC EDS software version 16.0 and earlier follow the steps below:
- Open uboot-socfpga/arch/arm/cpu/armv7/socfpga_arria10/cff.c and remove / comment out all printf/puts
- Rebuild u-boot-socfpga: make clean;make
This problem is scheduled to be fixed in a future release of the SoC EDS software.