altos: Add fast-timer API. Use for quadrature and button drivers
authorKeith Packard <keithp@keithp.com>
Mon, 10 Jun 2013 05:09:13 +0000 (22:09 -0700)
committerKeith Packard <keithp@keithp.com>
Mon, 10 Jun 2013 05:09:13 +0000 (22:09 -0700)
This splits the fast-timer portion out of the debounce helper code and
shares that with the quadrature driver which now uses it directly.

Signed-off-by: Keith Packard <keithp@keithp.com>

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