From 5dd5af5565880553b5a6736b517fe2a6759ddcd1 Mon Sep 17 00:00:00 2001 From: Miroslav Lichvar Date: Wed, 8 Jan 2014 14:23:47 +0100 Subject: [PATCH] phc2sys: Mention that PPS output needs to be enabled without -s. Signed-off-by: Miroslav Lichvar --- phc2sys.8 | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/phc2sys.8 b/phc2sys.8 index 5fcd6f0..22f6f44 100644 --- a/phc2sys.8 +++ b/phc2sys.8 @@ -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