This board has two RTL-8125B interfaces (drivers/net/rtl8169.c). The secondary interface (labelled "wan") was not working because of a wrong PCI address in file rk3568.dtsi.
Moreover, users could not instruct u-boot to use this secondary interface (i.e., using ethprime), because both interfaces had the same name.
Lastly, the mac address generated by u-boot was not properly passed to the Linux kernel, in the case of RTL-8125B.
This series probably improves support of other similar boards too (e.g., Nanopi R5S).
Etienne Dublé (3): net: give a different name to rtl8169 interfaces rockchip: fix wrong PCI range address in rk3568 dtsi net: RTL-8125B -- write mac to MAC0_BKP
drivers/net/rtl8169.c | 26 +++++++++++++++++++++ dts/upstream/src/arm64/rockchip/rk3568.dtsi | 2 +- 2 files changed, 27 insertions(+), 1 deletion(-)