From b796d90e80817d654d219708b47650f3cc9fa570 Mon Sep 17 00:00:00 2001 From: Miroslav Lichvar Date: Tue, 18 Jun 2013 15:52:31 +0200 Subject: [PATCH] Minor documentation improvements. Signed-off-by: Miroslav Lichvar --- phc2sys.8 | 8 ++++---- ptp4l.8 | 7 +++++-- 2 files changed, 9 insertions(+), 6 deletions(-) diff --git a/phc2sys.8 b/phc2sys.8 index 010fa18..8e03e81 100644 --- a/phc2sys.8 +++ b/phc2sys.8 @@ -40,9 +40,9 @@ program. Two synchronization modes are supported, one uses a pulse per second (PPS) signal provided by the source clock and the other mode reads time from the -source clock directly. The PPS mode is usually preferred, because reading the -PHC is slow and introduces an unknown error in the readings, but not all PHCs -provide the PPS signal. +source clock directly. Some clocks can be used in both modes, the mode which +will synchronize the slave clock with better accuracy depends on hardware and +driver implementation. .SH OPTIONS .TP @@ -58,7 +58,7 @@ option should be used too. 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 +Specify the master clock by device (e.g. /dev/ptp0) or interface (e.g. eth0) or by name (e.g. CLOCK_REALTIME for the system clock). When this option is used together with the .B \-d diff --git a/ptp4l.8 b/ptp4l.8 index a722d77..43a8697 100644 --- a/ptp4l.8 +++ b/ptp4l.8 @@ -32,10 +32,13 @@ a peer delay request is received. .TP .B \-E Select the delay request-response (E2E) mechanism. This is the default -mechanism. +mechanism. All clocks on single PTP communication path must use the same +mechanism. A warning will be printed when a peer delay request is received on +port using the E2E mechanism. .TP .B \-P -Select the peer delay (P2P) mechanism. +Select the peer delay (P2P) mechanism. A warning will be printed when a delay +request is received on port using the P2P mechanism. .TP .B \-2 Select the IEEE 802.3 network transport.