linux-kernel - Re: [RFC PATCH net-next 7/9] net: dsa: microchip: ksz9477: add hardware time stamping support

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Message-ID: <20201022023233.GA904@hoboy.vegasvil.org>
Date:   Wed, 21 Oct 2020 19:42:01 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Christian Eggers <ceggers@...i.de>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Helmut Grohne <helmut.grohne@...enta.de>,
        Paul Barker <pbarker@...sulko.com>,
        Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>,
        George McCollister <george.mccollister@...il.com>,
        Marek Vasut <marex@...x.de>,
        Tristram Ha <Tristram.Ha@...rochip.com>,
        "David S . Miller" <davem@...emloft.net>,
        Woojung Huh <woojung.huh@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH net-next 7/9] net: dsa: microchip: ksz9477: add
 hardware time stamping support

I'm just catching up with this.

Really. Truly. Please -- Include the maintainer on CC for such patches!

In case you don't know who that is, you can always consult the MAINTAINERS file.

There you will find the following entry.

    PTP HARDWARE CLOCK SUPPORT
    M:      Richard Cochran <richardcochran@...il.com>
    L:      netdev@...r.kernel.org
    S:      Maintained
    W:      http://linuxptp.sourceforge.net/

On Thu, Oct 22, 2020 at 02:39:35AM +0300, Vladimir Oltean wrote:
> On Mon, Oct 19, 2020 at 07:24:33PM +0200, Christian Eggers wrote:
> > The PTP hardware performs internal detection of PTP frames (likely
> > similar as ptp_classify_raw() and ptp_parse_header()). As these filters
> > cannot be disabled, the current delay mode (E2E/P2P) and the clock mode
> > (master/slave) must be configured via sysfs attributes.

This is a complete no-go.  NAK.

Richard