netdev - Re: [PATCH v3 5/8] net: dsa: hellcreek: Add TAPRIO offloading support

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Date:   Thu, 27 Aug 2020 09:25:51 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Kurt Kanzenbach <kurt@...utronix.de>
Cc:     Vladimir Oltean <olteanv@...il.com>, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Kamil Alkhouri <kamil.alkhouri@...offenburg.de>,
        ilias.apalodimas@...aro.org
Subject: Re: [PATCH v3 5/8] net: dsa: hellcreek: Add TAPRIO offloading support

On Tue, Aug 25, 2020 at 11:55:37AM +0200, Kurt Kanzenbach wrote:
> 
> I get your point. But how to do it? We would need a timer based on the
> PTP clock in the switch.

Can't you use an hrtimer based on CLOCK_MONOTONIC?

I would expect the driver to work based solely on the device's clock.

Thanks,
Richard