***OpenWRT 21.02 + Kernel 5.4 ***
NanoPi-R2S NanoPi-R4S
-Vanilla OpenWRT + some ImmortalWRT patches for RockChip target (avoiding the ones oopsing)
-R2S : r8152 driver v1.11.11 backport for R2S + realtek r8169 firmwares package
-R4S : r8168 driver for R4S (realtek) instead of kernel r8169 + r8169 firmwares package
!!! not tested extensively !!! use at own risk