On Fri, Oct 04, 2019 at 05:02:37PM +0200, Christian Kellner wrote: > Should work. What would the value be for Thunderbolt 3 (and before)? I > guess '0' if I am looking at the right thing (bits 31:24 in > ROUTER_CS_4)? Yes, it would be 0x10 and below that depending on the generation. > Is there any harm of also having the 'generation' exposed > as well? I like the simplicity of the mapping from that value to > Thunderbolt/USB4 standard version (e.g. I would show that in 'boltctl > list'); 'hw_version' will need a bit more "interpreting". If generation is the only thing you need, we can export that now and forget hw_version :)