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authorAlexander Gordeev <lasaine@lvk.cs.msu.su>2011-01-13 04:00:57 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 19:03:21 +0300
commite2c18e49a0d4f822ffc29fb4958943beb1ff08b7 (patch)
tree227dbb544277f7908fa1666ce21a15e6b2282ccb /Documentation/ioctl
parent025b40abe715d638e60516a657d354e8560c1a85 (diff)
downloadlinux-e2c18e49a0d4f822ffc29fb4958943beb1ff08b7.tar.xz
pps: capture MONOTONIC_RAW timestamps as well
MONOTONIC_RAW clock timestamps are ideally suited for frequency calculation and also fit well into the original NTP hardpps design. Now phase and frequency can be adjusted separately: the former based on REALTIME clock and the latter based on MONOTONIC_RAW clock. A new function getnstime_raw_and_real is added to timekeeping subsystem to capture both timestamps at the same time and atomically. Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su> Acked-by: John Stultz <johnstul@us.ibm.com> Cc: Rodolfo Giometti <giometti@enneenne.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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