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| author | Ben Hutchings <bhutchings@solarflare.com> | 2012-09-03 11:34:58 +0100 |
|---|---|---|
| committer | Ben Hutchings <bhutchings@solarflare.com> | 2012-09-07 21:13:28 +0100 |
| commit | 220a60a425146b0e37998cc0b3082f0541aad866 (patch) | |
| tree | 44e48c4489f8e354d17269d41db19d015d9b95fe /drivers | |
| parent | ef2c7d7b59708d54213c7556a82d14de9a7e4475 (diff) | |
| download | linux-220a60a425146b0e37998cc0b3082f0541aad866.tar.gz linux-220a60a425146b0e37998cc0b3082f0541aad866.tar.bz2 linux-220a60a425146b0e37998cc0b3082f0541aad866.zip | |
pps/ptp: Allow PHC devices to adjust PPS events for known delay
Initial version by Stuart Hodgson <smhodgson@solarflare.com>
Some PHC device drivers may deliver PPS events with a significant
and variable delay, but still be able to measure precisely what
that delay is.
Add a pps_sub_ts() function for subtracting a delay from the
timestamp(s) in a PPS event, and a PTP event type (PTP_CLOCK_PPSUSR)
for which the caller provides a complete PPS event.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ptp/ptp_clock.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c index 1e528b539a07..966875dcda56 100644 --- a/drivers/ptp/ptp_clock.c +++ b/drivers/ptp/ptp_clock.c @@ -300,6 +300,11 @@ void ptp_clock_event(struct ptp_clock *ptp, struct ptp_clock_event *event) pps_get_ts(&evt); pps_event(ptp->pps_source, &evt, PTP_PPS_EVENT, NULL); break; + + case PTP_CLOCK_PPSUSR: + pps_event(ptp->pps_source, &event->pps_times, + PTP_PPS_EVENT, NULL); + break; } } EXPORT_SYMBOL(ptp_clock_event); |