netdev - Re: [PATCH RFC net-next] net: phy: add Marvell PHY PTP support

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Message-ID: <20200726234856.GG1551@shell.armlinux.org.uk>
Date:   Mon, 27 Jul 2020 00:48:56 +0100
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Richard Cochran <richardcochran@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org
Subject: Re: [PATCH RFC net-next] net: phy: add Marvell PHY PTP support

On Tue, Jul 14, 2020 at 05:26:28PM +0100, Russell King wrote:
> The driver takes inspiration from the Marvell 88E6xxx DSA and DP83640
> drivers.  The hardware is very similar to the implementation found in
> the 88E6xxx DSA driver, but the access methods are very different,
> although it may be possible to create a library that both can use
> along with accessor functions.

I think this definitely needs to become a library - I've just been
looking at mvneta in Armada 388.  One of the three interfaces has
PTP support, and it looks like the register set is again very
similar to the 88E151x and 88E6xxx PTP/TAI register layouts, but
has yet another different access method.

We certainly don't want three copies of almost identical code...

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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