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Probably a better example than WiFi would be the on-chip SDRAM controller. It's always somebody's IP and there's a blob in the boot firmware that's just binary register settings. Like so:
https://github.com/u-boot/u-boot/blob/master/arch/riscv/dts/...
I think that the TH1520 in the Beagle-V and Lichee Pi 4A only has support for 5.10 kernel at least for access to most of the features of the SoC. If you do not mind loosing access to most features of the SoC, then you can run any kernel.
ref: https://github.com/ThomasKaiser/sbc-bench/blob/master/Result...