Can I Xmodmap only a specific device?

Question

I'd like to reverse scroll direction, but only on my BCM5794 multitouch trackpad. Is this possible?

[Didn't we cover this one already?](http://unix.stackexchange.com/questions/33114/reverse-two-finger-scroll-direction-with-bcm5974) — Ignacio Vazquez-Abrams, May 09 '12 at 04:01
That switches it for both my external USB mouse as well as the trackpad. How can I do it for _only_ the touchpad? — Naftuli Kay, May 09 '12 at 04:24
Is there something I can do in `.Xmodmap` to limit it to only BCM5974? — Naftuli Kay, May 09 '12 at 04:30
`setxkbmap` has a `--device` argument, combining this with the right `id` from `xinput --list` might help here (if `setxkbmap` can be used to specify what you asked for). — sr_, May 09 '12 at 06:52

score 6 · Accepted Answer · answered Nov 27 '12 at 21:45

Yes:

xinput set-button-map ID <button map>

Where you find the ID via xinput list and the <button map> is what you would have passed to xmodmap. For instance I replace buttons on my USB mouse but I don't want my trackpad munged, my ~/.Xmodmap used to look like this:

pointer = 1 17 3 4 5 6 7 8 9 10 11 12 13 14 15 16 2 18 19 20 21 22 23 24

But using that changes all pointing devices including my built in trackpad, so I know that the xinput id is 10 so I run this:

xinput set-button-map 10 1 17 3 4 5 6 7 8 9 10 11 12 13 14 15 16 2 18 19 20 21 22 23 24

Can I Xmodmap only a specific device?

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