ian 07936ba804 MFC r293781:
Restore uart PPS signal capture polarity to its historical norm, and add an
  option to invert the polarity in software. Also add an option to capture
  very narrow pulses by using the hardware's MSR delta-bit capability of
  latching line state changes.

Relnotes:	yes
2016-01-17 18:18:01 +00:00
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