Created attachment 223826 [details] .diff file for new port submission RockPi E is a RK3328-based SBC with dual Ethernet. See https://wiki.radxa.com/RockpiE. Original work was done by Sergey (https://reviews.freebsd.org/p/s199p.wa1k9r_gmail.com/). See: https://forum.radxa.com/t/freebsd-13-current-on-rock-pi4/2071/33
Please submit the diff to u-boot upstream first.
Created attachment 223974 [details] simplified diff u-boot-rock-pi-e is upstream in u-boot so I have simplified the diff as attached and will contact upstream to get other fixes put in there. I hope this is suitable to add as port for now.