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Diffstat (limited to 'Documentation/input/multi-touch-protocol.rst')
| -rw-r--r-- | Documentation/input/multi-touch-protocol.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/input/multi-touch-protocol.rst b/Documentation/input/multi-touch-protocol.rst index 307fe22d9668..21c1e6a22888 100644 --- a/Documentation/input/multi-touch-protocol.rst +++ b/Documentation/input/multi-touch-protocol.rst @@ -260,6 +260,10 @@ ABS_MT_PRESSURE of TOUCH and WIDTH for pressure-based devices or any device with a spatial signal intensity distribution. + If the resolution is zero, the pressure data is in arbitrary units. + If the resolution is nonzero, the pressure data is in units/gram. See + :ref:`input-event-codes` for details. + ABS_MT_DISTANCE The distance, in surface units, between the contact and the surface. Zero distance means the contact is touching the surface. A positive number means |