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dp83640: Adjust ptp event timestamps

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Event timestamp values should be adjusted by 3*reference clock period +
  11 ns = 35 ns to compensate for input path and synchronization delays.

So subtract 35ns from event timestamps.

Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefan Sørensen 2014-07-11 08:18:26 +02:00 committed by David S. Miller
parent 5e6438db34
commit a0077a9fa3
1 changed files with 3 additions and 0 deletions
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3
drivers/net/phy/dp83640.c
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@ -755,6 +755,9 @@ static int decode_evnt(struct dp83640_private *dp83640,
event.type = PTP_CLOCK_EXTTS;
event.timestamp = phy2txts(&dp83640->edata);
/* Compensate for input path and synchronization delays */
event.timestamp -= 35;
for (i = 0; i < N_EXT_TS; i++) {
if (ext_status & exts_chan_to_edata(i)) {
event.index = i;