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From: Richard Cochran <richardcochran@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: "Csókás Bence" <csokas.bence@prolan.hu>,
	netdev@vger.kernel.org, "Fugang Duan" <fugang.duan@nxp.com>
Subject: Re: [PATCH] fec: Restart PPS after link state change
Date: Wed, 10 Aug 2022 18:37:19 -0700	[thread overview]
Message-ID: <YvRdTwRM4JBc5RuV@hoboy.vegasvil.org> (raw)
In-Reply-To: <YvRH06S/7E6J8RY0@lunn.ch>

On Thu, Aug 11, 2022 at 02:05:39AM +0200, Andrew Lunn wrote:
> > Yes. We use PPS to synchronize devices on a common backplane. We use PTP to
> > sync this PPS to a master clock. But if PTP sync drops out, we wouldn't want
> > the backplane-level synchronization to fail. The PPS needs to stay on as
> > long as userspace *explicitly* disables it, regardless of what happens to
> > the link.
> 
> We need the PTP Maintainers view on that. I don't know if that is
> normal or not.

IMO the least surprising behavior is that once enabled, a feature
stays on until explicitly disabled.

Thanks,
Richard

  reply	other threads:[~2022-08-11  1:37 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-09 12:41 [PATCH] fec: Restart PPS after link state change Csókás Bence
2022-08-09 17:28 ` Andrew Lunn
2022-08-10 11:36   ` Csókás Bence
2022-08-11  0:05     ` Andrew Lunn
2022-08-11  1:37       ` Richard Cochran [this message]
2022-08-11  2:05         ` Andrew Lunn
2022-08-11  8:07           ` Csókás Bence
2022-08-11 16:38           ` Richard Cochran
2022-08-11  9:23       ` Csókás Bence
2022-08-11 13:30         ` Andrew Lunn
2022-08-11 14:45           ` Csókás Bence
2022-08-10 14:00 Csókás Bence

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