Add PPS signal generator which utilizes STROBE pin of a parallel port to
send PPS signals. It uses parport abstraction layer and hrtimers to
precisely control the signal.
[akpm@linux-foundation.org: fix build]
Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds