Unfortunately, to my knowledge there is no "official" buildroot image for the LicheeRV Nano that supports a Kernel higher than 5.x, although 7.x would bring native support for many features, likely the cpu governor.

However, there is also still a proprietary bootloader blob that has to be included, but still: I like the device and it's hardware... it could have better docs though.

I wrote some best practise, but a lot of thing are still missing: https://github.com/scpcom/LicheeSG-Nano-Build/blob/develop/b...

A newer project might be more successful on that: https://github.com/lone0/buildroot-external-licheervnano