On Tue, Feb 09, 2016 at 02:13:50PM +0530, Rayagond Kokatanur wrote:
> Is there any option to run both the clock on either UTC/TAI timescale ?

For SW time stamping, there is no PHC, and thus we use UTC.
For HW time stamping (PHC), there is no reason at all to use UTC.

If a ptp4l node with a PHC becomes slave to a UTC master, then it
applies the correction automatically.

> No, I am not running phc2sys on MASTER. But if I run phy2sys on master
> side (phy2sys -s /dev/ptp0 -w), then,

Try it like this on the master:

   phc2sys -a -r -r

Note the two 'r' flags.  And on the slave:

   phc2sys -a -r

See also the phc2sys man page.

Thanks,
Richard

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