Ah and one more clarification,

Because my device is reprisented using the POSIX interface, i do not
support the
phc_get_caps option. if I were to use the -p option to pass any clock, I
would have to
change this to something more basic, like I was doing in the posix_open
function, where
I was instead checking for the clock_gettime syscall. Would that be an
acceptable solution?

Regards,

Dimitrios

On Wed, Nov 7, 2018 at 4:07 PM Richard Cochran <[email protected]>
wrote:

> On Wed, Nov 07, 2018 at 03:16:22PM +0100, Dimitrios Katsaros wrote:
> > However, there is one issue for this setup to work correctly: fd clock
> > support is limited. The kernel does provide the ability to implement your
> > own POSIX clocks, but the daemons providing ptp clock support do not have
> > the ability to synchronize any system based POSIX clock, just the
> standard,
> > predefined clocks.
>
> The ptp4l program already has a command line option to specify the
> PHC.  Currently this is required to match the PHC associated with the
> network interface.  A minor change is needed to allow a different
> clock.
>
> So why not simply use the '-p' option?
>
> Initially, before we had the ethtool interfaces, this was needed to
> specify the PHC, but today the option is useless.
>
> We can change the code to relax the restrictions on the passed
> character device node path.
>
> Thanks,
> Richard
>
>
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