On Mon, Nov 21, 2016 at 01:23:56AM +0300, Alexander Inyukhin wrote: > Hi, > > I'm trying to setup PTP on my 82579V, and it seems that clock speed is 3.84 > times faster than expected. > > $ phc_ctl /dev/ptp0 -- get wait 1 get > phc_ctl[33374.657]: clock time is 1479697143.971579879 or Mon Nov 21 05:59:03 > 2016 > phc_ctl[33375.657]: process slept for 1.000000 seconds > phc_ctl[33375.657]: clock time is 1479697147.811930581 or Mon Nov 21 05:59:07 > 2016 > $ python -c "print 1479697147.811930581 - 1479697143.971579879" > 3.84035086632 > > Most likely, this device has 96MHz clock instead of 25MHz (these values > are taken from ./drivers/net/ethernet/intel/e1000e/netdev.c file). > How could I fix that?
Looks like 83129b37ef is to blame. Before this patch e1000_pch2lan devices always have 96MHz clock, but now the clock speed depends on E1000_TSYNCRXCTL_SYSCFI bit. ------------------------------------------------------------------------------ _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
