> Yes there are registers that you can read to identify the specific chip. > > It still might be useful to have a expected vs actual check as those ID > values are determined by pin strapping resistors. That i don't get? Can i turn a * 98DX2538: 24x1G + 2x10G + 2x10G Stack into a * 98DX2535: 24x1G + 4x1G Stack by strapping its pin differently? > It could also be used > to validate the dts (e.g. port 20 would be invalid on a 98DX3501). But > those are considerations for further down the track. Yes, that would be up to the switchdev driver to validate the DT based on the ID register. Andrew