netdev - Re: [PATCH 2/2] net: dsa: mv88e6xxx: Add 88E6176 device tree support

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Message-ID: <20161127220846.GH13318@lunn.ch>
Date:   Sun, 27 Nov 2016 23:08:46 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Andreas Färber <afaerber@...e.de>
Cc:     netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Uwe Kleine-König <uwe@...ine-koenig.org>,
        Michal Hrusecki <Michal.Hrusecky@....cz>,
        Tomas Hlavacek <tomas.hlavacek@....cz>,
        Bed??icha Ko??atu <bedrich.kosata@....cz>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] net: dsa: mv88e6xxx: Add 88E6176 device tree support

> > This driver already supports nearly 30 different Marvell switch
> > models. Please document why the marvell,mv88e6176 is special and why
> > it needs its own compatible string when the others don't.
> 
> I don't understand.

Think about what i said. Why does the 6176 need its own compatible
string, when the two 6352s and the 6165 on the zii-devel-b don't have
one? And the DIR 665 has a 6171, which does not have a compatible
string of its own. The clearfog actually has a 6176, and it seems to
work fine without a compatible string.

> You as driver author should know that the .data pointer is vital to your
> driver

Exactly, so if i ask why is it needed, maybe you should stop and think
for a while.

> you even recently accepted another model that conflicted with
> my patch.

And think about that also, and you will find the 6390 family, who's
first device is 6190, is not compatible with the 6085, and so needs a
different compatible string.

	  Andrew