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Date:   Mon, 11 Jan 2021 18:14:20 -0800
From:   Richard Cochran <>
To:     Vincent MAILHOL <>
Cc:     Marc Kleine-Budde <>,
        linux-can <>,
        Jeroen Hofstee <>,
        Wolfgang Grandegger <>,
        "David S. Miller" <>,
        Jakub Kicinski <>,
        "open list:NETWORKING DRIVERS" <>,
        open list <>
Subject: Re: [PATCH v3 1/1] can: dev: add software tx timestamps

On Tue, Jan 12, 2021 at 09:00:33AM +0900, Vincent MAILHOL wrote:
> Out of curiosity, which programs do you use? I guess wireshark
> but please let me know if you use any other programs (I just use
> to write a small C program to do the stuff).

I was thinking of PTP over DeviceNET (which, in turn, is over CAN).
This is specified in Annex G of IEEE 1588.

The linuxptp stack has modular design and could one day support
DeviceNET.  It would be much easier for linuxptp if CAN interfaces
support hardware time stamping in the same way as other network


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