YES! I do know this device is not supported for a long time. Yet, it is still safer to use older OpenWRT firmware rather than abandoned vendor firmware.
Does anybody know which OpenWRT firmware to use for this device?
D-Link DIR-615 (N300) Hardware Version : Q2
According to wikidevi this router uses a Realtek RTL8196E.
As i can't see any supported router with this SOC in the ToH, i'm sure there's no OpenWrt firmware for this ancient device, and never will be.