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Fix the man page regarding the '-p' option. 

The -p option for ptp4l, which specifies the PHC device, was added
before the ethtool get_ts_info ioctl had been invented.  Today it does
not "force" the given device as the man page says.  Instead this is a
legacy option only useful when running on older kernels.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
master
Richard Cochran 2016-07-03 20:45:41 +02:00
parent d825b1d549
commit 0d61027fd3
1 changed files with 5 additions and 3 deletions
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8
ptp4l.8
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@ -1,4 +1,4 @@
.TH PTP4l 8 "December 2014" "linuxptp"
.TH PTP4l 8 "July 2016" "linuxptp"
.SH NAME
ptp4l - PTP Boundary/Ordinary Clock
@ -70,8 +70,10 @@ Specify a PTP port, it may be used multiple times. At least one port must be
specified by this option or in the configuration file.
.TP
.BI \-p " phc-device"
With hardware time stamping, force which PHC device (e.g. /dev/ptp0) should be
used.
(This option is deprecated.)
Before Linux kernel v3.5 there was no way to discover the PHC device
associated with a network interface. This option specifies the PHC
device (e.g. /dev/ptp0) to be used when running on legacy kernels.
.TP
.B \-s
Enable the slaveOnly mode.