Hi,

Thanks for making this slick driver. I just used it on my recently purchased Beekeeb Toucan. One issue I noticed is that I wanted a way to get touch notifications. With touch notification I was able to add a layer that instantly turns on/off anytime a finger is touching the trackpad. This allows adding an input processor to switch layers to a layer that remaps some keys to be mouse buttons.

As I'm sure you know - to get touch data (z height) from the pinnacle part the chip needs to be in abs mode. So when this mode is enabled via the device-tree I use the @halfdane existing abs work (included as a dependency for my change) to configure the part. But I do my own math to convert the abs coords into relative moves before forwarding up the stack.

I don't know if you want this as a PR, but if you do here it is. If you have interest I'm happily willing to update the PR to match whatever requirements your project has.

Rock on.

This mode operates the chip in absolute mode (with all of the existing
absolute options).  But reports events as RELATIVE.  This allows use as a
relative touchpad but the addition of EVENT_BTN_TOUCH notifications when
a finger is either on or off of the touchpad.

Such notifications are especially useful to automate instantly switching to/from
a layer that has keys bounds as 'mouse buttons'. (with none of the lag/delays of
'temporary layers' or the cost of constantly sending bluetooth packets between
two halves of a split keybaord)