Hi,
+ .help = "attach USB device 'bus.addr'",
+...@item usb_attach @var{devname}
/me sees a mismatch here.There is still the use case question. Also note that this might have unwanted side effects when drivers automagically attach/detach devices like usb-host.
Having this purely for debugging/troubleshooting purposes would be fine with me, but the documentation should clearly say so.
cheers, Gerd