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refclock_phc: support ethernet ifname as specifier

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This commit allows the user to select a PHC refclock associated with
an Ethernet interface by specifying the interface name. This allows
the user to handle situations where multiple NICs are exposing PHC
devices (or non-NIC PHC device files exist in the system) in a more
streamline manner.
This commit is contained in:
Shachar Raindel
2025-04-23 13:46:44 -07:00
committed by Miroslav Lichvar
parent 81362fa201
commit 6e541afbe9
5 changed files with 98 additions and 26 deletions
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5
doc/chrony.conf.adoc
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@@ -557,8 +557,9 @@ refclock SHM 1:perm=0644 refid GPS2
----
+
*PHC*:::
PTP hardware clock (PHC) driver. The parameter is the path to the device of
the PTP clock which should be used as a time source. If the clock is kept in
PTP hardware clock (PHC) driver. The parameter is the absolute path to the
device of the PTP clock which should be used as a time source, or the name of
the network interface whose PTP clock should be used. If the clock is kept in
TAI instead of UTC (e.g. it is synchronised by a PTP daemon), the current
UTC-TAI offset needs to be specified by the *offset* option. Alternatively, the
*pps* refclock option can be enabled to treat the PHC as a PPS refclock, using