fw_setenv ethaddr "$(cat /sys/class/net/eth0/address)"
;;
bananapi,bpi-r3|\
-bananapi,bpi-r3-mini)
+bananapi,bpi-r3-mini|\
+bananapi,bpi-4)
[ -z "$(fw_printenv -n ethaddr 2>/dev/null)" ] &&
fw_setenv ethaddr "$(cat /sys/class/net/eth0/address)"
[ -z "$(fw_printenv -n eth1addr 2>/dev/null)" ] &&