On Fri, Jul 11, 2014 at 02:03:03AM +0800, Ronex Dicapriyo wrote:
> Hello,
> 
> I need to implement functionality of 1588 PTP standard in some harware IP 
> model. For this I have few queries as below:
> 
> 1) Linux ptp implementation -
>    How it uses/works for harware and software timestamping ?

In the Linux kernel soruces, see:

- Documentation/ptp
- Documentation/networking/timestamping.txt

> 2) If any application want to make use of it, which API's are useful to 
> set/modify/change timestamps and other functionality ?
>    Kindly if possible share some application example which has use this 
> library. And some reference to document/manual which can used to understands 
> guts of library.

Look at the linuxptp README, the sources, and the man pages.

Thanks,
Richard

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