linux-kernel - Re: [PATCH v2] net: stmmac: correct MAC propagation delay

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Message-ID: <ZME88hOgNug+PFga@hoboy.vegasvil.org>
Date:   Wed, 26 Jul 2023 08:34:10 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Marc Kleine-Budde <mkl@...gutronix.de>
Cc:     Jakub Kicinski <kuba@...nel.org>,
        Johannes Zink <j.zink@...gutronix.de>,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de,
        netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Russell King <linux@...linux.org.uk>,
        kernel test robot <lkp@...el.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Paolo Abeni <pabeni@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-arm-kernel@...ts.infradead.org, patchwork-jzi@...gutronix.de
Subject: Re: [PATCH v2] net: stmmac: correct MAC propagation delay

On Wed, Jul 26, 2023 at 08:04:37AM +0200, Marc Kleine-Budde wrote:

> At least the datasheet of the IP core tells to read the MAC delay from
> the IP core (1), add the PHY delay (2) and the clock domain crossing
> delay (3) and write it to the time stamp correction register.

That is great, until they change the data sheet.  Really, this happens.

Thanks,
Richard