This article will document the process of making OpenWRT work on the DIR-615 rev. A1.
In its dmesg, the stock firmware reports this board as "Marvell Development Board (LSP Version 0.0.102)-- RD-88F5181L-VOIP-FE".
I have managed to unbrick a D-Link DIR-615 Rev A1 back to D-Link firmware (1.00) from firmware 1.10. Allow me to describe the situation: