Hi,
as someone already pointed out, we need to enable flashing first on the board using a GPIO pin. I have attached a patch for flashrom that enables flashing on the HP DL145 G3. I tested it on the DL145 I have here.
Please specify the board on the commandline, like in # ./flashrom -m "hp:dl145_g3" -E
The patch is probably not ready for primetime, maybe someone can review it?
Regards, Mondrian