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phc2sys: Mention that PPS output needs to be enabled without -s. 

Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
master
Miroslav Lichvar 2014-01-08 14:23:47 +01:00 committed by Richard Cochran
parent cee9397b66
commit 5dd5af5565
1 changed files with 7 additions and 2 deletions
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phc2sys.8
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@ -60,8 +60,13 @@ should be already close to the correct time before
.B phc2sys
is started or the
.B \-s
option should be used too. This option can be used only with the system clock as
the slave clock.
option should be used too. With the
.B \-s
option the PPS signal of the master clock is enabled automatically, otherwise
it has to be enabled before
.B phc2sys
is started (e.g. by running \f(CWecho 1 > /sys/class/ptp/ptp0/pps_enable\fP).
This option can be used only with the system clock as the slave clock.
.TP
.BI \-s " device"
Specify the master clock by device (e.g. /dev/ptp0) or interface (e.g. eth0) or