linux-kernel - Re: [PATCH 10/12] misc: Flexcard basic timestamp counter support

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Date:   Wed, 14 Dec 2016 10:16:23 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Arnd Bergmann <arnd@...db.de>
cc:     Holger Dengler <dengler@...utronix.de>,
        Lee Jones <lee.jones@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Vinod Koul <vinod.koul@...el.com>,
        linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
        Sebastian Siewior <bigeasy@...utronix.de>,
        Juergen Bubeck <bubeck@...ug.com>,
        Peter Mahler <mahler@...ug.com>,
        Benedikt Spranger <b.spranger@...utronix.de>
Subject: Re: [PATCH 10/12] misc: Flexcard basic timestamp counter support

On Wed, 14 Dec 2016, Arnd Bergmann wrote:
> On Wednesday, December 14, 2016 1:11:51 AM CET Holger Dengler wrote:
> > The Eberspaecher Flexcard PMC II offers a Flexray network synchronized
> > counter with a selectable resolution of 1us, 100ns or 10ns. Add basic
> > support for the timestamp counter with 1us resolution, which is the
> > standard Flexray bus resolution.
> > 
> > Signed-off-by: Benedikt Spranger <b.spranger@...utronix.de>
> > Signed-off-by: Holger Dengler <dengler@...utronix.de>
> > cc: Arnd Bergmann <arnd@...db.de>
> > cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > 
> 
> Have you tried fitting this in the drivers/ptp/ framework rather
> than having your own posix clock for it?

It has nothing to do with PTP. It's a completely seperate clock and cannot
be used for PTP style time synchronization.

Thanks,

	tglx