Compiling a new u-boot for the Duo S

In an attempt to get my board completely updated I am a little stumped trying to get u-boot compiled for it. Does anyone have any instructions? I would like to try to use v2026.01 if possible but anything newer would be appreciated.

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How far have you got and what’s the stumbling point?

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The only thing I was able to find was the Duo board in mainline uboot which uses the CV1800B which is RISC-V, but I want to use the ARM64 side.

If I change this to arm64 it fails to compile. I have not seen an SG2000 uboot config.

If I get past compiling, I’m stuck again as I don’t know what the fip.bin is or how to generate it.