linux-kernel - Re: [Patch net-next v3 00/13] net: dsa: microchip: add PTP support for KSZ9563/KSZ8563 and LAN937x

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Date:   Fri, 9 Dec 2022 17:24:32 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Arun Ramadoss <arun.ramadoss@...rochip.com>
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        woojung.huh@...rochip.com, UNGLinuxDriver@...rochip.com,
        andrew@...n.ch, vivien.didelot@...il.com, f.fainelli@...il.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, linux@...linux.org.uk,
        Tristram.Ha@...rochip.com, richardcochran@...il.com,
        ceggers@...i.de
Subject: Re: [Patch net-next v3 00/13] net: dsa: microchip: add PTP support
 for KSZ9563/KSZ8563 and LAN937x

On Fri, Dec 09, 2022 at 12:54:24PM +0530, Arun Ramadoss wrote:
> KSZ9563/KSZ8563 and  LAN937x switch are capable for supporting IEEE 1588 PTP
> protocol.  LAN937x has the same PTP register set similar to KSZ9563, hence the
> implementation has been made common for the KSZ switches.  KSZ9563 does not
> support two step timestamping but LAN937x supports both.  Tested the 1step &
> 2step p2p timestamping in LAN937x and p2p1step timestamping in KSZ9563.
> 
> This patch series is based on the Christian Eggers PTP support for KSZ9563.
> Applied the Christian patch and updated as per the latest refactoring of KSZ
> series code. The features added on top are PTP packet Interrupt
> implementation based on nested handler, LAN937x two step timestamping and
> programmable per_out pins.

>From my perspective, the DSA API is used correctly and it should be good
to go in the next patchset iteration. API usage is about all I tried to
concentrate upon. I of course encourage Richard and Christian to point out
if there's something out of the ordinary on the protocol side of things.