[LinuxPPS] How to use PPS to adjust system clock time ?

[Rodolfo Giometti]

On 16/02/2019 08:53, Ran Shalit wrote:
> Thank you very much Rodolfo for the reply.
> I had assumed that linuxPPS interface should only use seconds (2,3,...) but I still don't understand where the nanosecond resolution in linuxpps interface arrives from.

 From the system clock.

> Is it that the linuxpps interface already attached the pps to the system clock ?

No. A pps device simply attachs a timestamp to each arriving pulse then a 
userland program uses these information to precisely set system clock.

Ciao,

Rodolfo

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