This is a fun little project of mine that converts Apple Magic Mouse's one-finger touch events to two-fingered touchpad-driven events.
This way, the userspace(e.g. libinput or Synaptics) can recognize those events as touchpad events and apply smooth scrolling.
See this demo.
Do a make, and replace /lib/modules's hid-magicmouse.ko to this one.
Or, simply do a rmmod hid_magicmouse; insmod hid-magicmouse.ko.
This is a little rough around the edges.
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You need to have two fingers on the surface at all times if you don't want it to randomly start scrolling.
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Upon switching from scrolling to just resting your fingers on the surface, you may find "finger-rejection" is less than ideal.
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A single tap on the surface will register as a right click. This needs a rejection implementation.