Boundary clock support for ptpd

[gnn]

On 4/15/10 15:54 , Wolfgang Grandegger wrote:
> Hello,
> 
> anybody listening?
> 

Yes, just a bit slow.

> Wolfgang Grandegger wrote:
>> Hello,
>>
>> I'm currently evaluating ptpd-1.0.0 for IEEE1588 time syncronization
>> with MPC8313 boards. I realized that there is an effort to support PTPv2
>> (at http://ptpd.svn.sourceforge.net/viewvc/ptpd/branches/v2/). Could
>> somebody give a brief status on what is already working/supported. I'm
>> especially looking for boundary clock support (master and slave on the
>> same board).
> 
> In the meantime I made some progress. I cascaded three MPC8313 boards
> and measured jitters of +-150ns on the second and +-300ns on the third
> board with ptpd *v1*. I will now try with v2 allowing for shorter sync
> intervals, which should reduce the jitter significantly.
> 
> I also found some interesting related link. Apart from the PTPDv2
> implementation mentioned above, there is another one, especially for the
> MPC8313, mentioned here:
> 
> http://forums.freescale.com/t5/Other-Microcontrollers/Open-source-for-IEEE-1588-PTP-v2-supporting-MPC831x-to-be/m-p/53829;jsessionid=9DF51308EB4B68D57F509D77E77C8DD9
> http://code.google.com/p/ptpv2d/
> 
> As I see it, this one also lacks support for recent kernel versions
> using the timestamping interface:
> 
> http://lxr.linux.no/linux/Documentation/networking/timestamping.txt
> 
> Is there already an effort supporting that generic interface in ptpd or
> ptpdv2?


I have not looked at that, but I will try to check that out.

Best,
George