Force Touch click and pressure sensing

How it tests

Waits for a click, then asks for a firm press and watches the multi-touch pressure axis (ABS_MT_PRESSURE; the single-touch axis doesn't count, bcm5974 makes it from contact size).

How it decides

Supported: click and pressure past half its range. Partial: click works but there's no pressure axis (what Linux drivers give today), or the tester says pressure didn't rise. Failed: no trackpad or clicks do nothing.

How sure it is

It matches what Linux supports today and says so. Not yet run on a Force Touch Mac.

What could mislead it

• Could fail when it shouldn'tA pad whose pressure scale tops out lower never reaches 50 %.