tree 36c1d3d3c3becdcda11bfdda002dde40b8b2f4aa
parent aa1b9b4836a8ab093ec06b0780553566a5430da7
author Martin Peres <martin.peres@labri.fr> 1346548845 +0200
committer Ben Skeggs <bskeggs@redhat.com> 1349233994 +1000

drm/nouveau/fan: rewrite the fan tachometer driver to get more precision, faster

The previous driver waited for 250ms to accumulate data. This version times a
complete fan rotation and extrapolates to RPM.

The fan rotational speed should now be read in less than 250ms (worst case)
and usually in less 50ms.

Signed-off-by: Martin Peres <martin.peres@labri.fr>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>