netdev - Re: [PATCH net-next v2 0/5] ptp: Support hardware clocks with additional free running cycle counter

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Message-ID: <20220406230437.GB78819@hoboy.vegasvil.org>
Date:   Wed, 6 Apr 2022 16:04:37 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Gerhard Engleder <gerhard@...leder-embedded.com>
Cc:     vinicius.gomes@...el.com, yangbo.lu@....com, davem@...emloft.net,
        kuba@...nel.org, mlichvar@...hat.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2 0/5] ptp: Support hardware clocks with
 additional free running cycle counter

On Sun, Apr 03, 2022 at 07:55:39PM +0200, Gerhard Engleder wrote:
> ptp vclocks require a clock with free running time for the timecounter.
> Currently only a physical clock forced to free running is supported.
> If vclocks are used, then the physical clock cannot be synchronized
> anymore. The synchronized time is not available in hardware in this
> case. As a result, timed transmission with TAPRIO hardware support
> is not possible anymore.

I'm travelling this week, but I will review this as soon as I can.

Thanks,
Richard