linux-kernel - Re: [PATCH net-next v3 00/12] net: dsa: microchip: PTP support for KSZ956x

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Date:   Thu, 19 Nov 2020 06:28:06 +0100
From:   Christian Eggers <ceggers@...i.de>
To:     Vladimir Oltean <olteanv@...il.com>
CC:     Jakub Kicinski <kuba@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        "Richard Cochran" <richardcochran@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        "Vivien Didelot" <vivien.didelot@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Kurt Kanzenbach <kurt.kanzenbach@...utronix.de>,
        George McCollister <george.mccollister@...il.com>,
        Marek Vasut <marex@...x.de>,
        Helmut Grohne <helmut.grohne@...enta.de>,
        Paul Barker <pbarker@...sulko.com>,
        "Codrin Ciubotariu" <codrin.ciubotariu@...rochip.com>,
        Tristram Ha <Tristram.Ha@...rochip.com>,
        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: [PATCH net-next v3 00/12] net: dsa: microchip: PTP support for KSZ956x

Hi Vladimir,

On Thursday, 19 November 2020, 00:40:18 CET, Vladimir Oltean wrote:
> On Wed, Nov 18, 2020 at 09:30:01PM +0100, Christian Eggers wrote:
> > This series adds support for PTP to the KSZ956x and KSZ9477 devices.
> > 
> > There is only little documentation for PTP available on the data sheet
> > [1] (more or less only the register reference). Questions to the
> > Microchip support were seldom answered comprehensively or in reasonable
> > time. So this is more or less the result of reverse engineering.
> 
> [...]
> One thing that should definitely not be part of this series though is
> patch 11/12. Christian, given the conversation we had on your previous
> patch:
> https://lore.kernel.org/netdev/20201113025311.jpkplhmacjz6lkc5@skbuf/
sorry, I didn't read that carefully enough. Some of the other requested changes
were quite challenging for me. Additionally, finding the UDP checksum bug
needed some time for identifying because I didn't recognize that when it got
introduced.

> as well as the documentation patch that was submitted in the meantime:
> https://lore.kernel.org/netdev/20201117213826.18235-1-a.fatoum@pengutronix.de/ 
I am not subscribed to the list. 

> obviously you chose to completely disregard that. May we know why? How
> are you even making use of the PTP_CLK_REQ_PPS feature?
Of course I will drop that patch from the next series.

regards
Christian