phc2sys: Mention that PPS output needs to be enabled without -s.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>master
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cee9397b66
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5dd5af5565
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@ -60,8 +60,13 @@ should be already close to the correct time before
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.B phc2sys
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.B phc2sys
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is started or the
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is started or the
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.B \-s
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.B \-s
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option should be used too. This option can be used only with the system clock as
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option should be used too. With the
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the slave clock.
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.B \-s
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option the PPS signal of the master clock is enabled automatically, otherwise
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it has to be enabled before
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.B phc2sys
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is started (e.g. by running \f(CWecho 1 > /sys/class/ptp/ptp0/pps_enable\fP).
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This option can be used only with the system clock as the slave clock.
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.TP
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.TP
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.BI \-s " device"
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.BI \-s " device"
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Specify the master clock by device (e.g. /dev/ptp0) or interface (e.g. eth0) or
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Specify the master clock by device (e.g. /dev/ptp0) or interface (e.g. eth0) or
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