The U-Boot next branch with additional patches that will appear in the v2021.04 release was tested. These comprise the implementation on non-blocking functions in the file protocol.
The SCT was run using the U-Boot sandbox on ARMv8:
./u-boot -T -l
- origin/master 7889951d0f56eab746a7c8fde350a022ba0361ca
- yet to publish FAT patches