Im busy with the hardware design and PCB layout for a custom design. Im using the AT91SAM9263 and will run linux on it. At the last moment there is a requirment to add a PS2 interface to allow a barcode scanner (keyboard emulator) to be connected.

What PS2 keyboard controller interaces does linux support allready without me changing of developing a driver for my "keyboard"?

a quickest out-of-the-box solution would be using usb->ps2 converter.