netdev - Re: DSA support for Marvell 88e6065 switch

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Date:   Sun, 18 Nov 2018 19:07:12 +0100
From:   Pavel Machek <pavel@....cz>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev@...r.kernel.org, f.fainelli@...il.com, buytenh@...vell.com,
        buytenh@...tstofly.org, nico@...vell.com
Subject: Re: DSA support for Marvell 88e6065 switch

On Thu 2018-11-15 21:26:18, Andrew Lunn wrote:
> On Thu, Nov 15, 2018 at 08:51:11PM +0100, Pavel Machek wrote:
> > Hi!
> > 
> > I'm trying to create support for Marvell 88e6065 switch... and it
> > seems like drivers/net/dsa supports everything, but this model.
> > 
> > Did someone work with this hardware before? Any idea if it would be
> > more suitable to support by existing 88e6060 code, or if 88e6xxx code
> > should serve as a base?
> 
> Hi Pavel
> 
> The 88e6xxx should be extended to support this. I think you will find
> a lot of the building blocks are already in the driver. Compare the
> various implementations of the functions in the mv88e6xxx_ops to what
> the datasheet says for the registers, and pick those that match.

Ok, so I played a bit.

It looks like e6065 has different register layout from those supported
by 6xxx, and is quite similar to e6060.

I understand how 88e6xxx code is supposed to work... but I don't
understand how e6060 code is supposed to be probed. It does not seem
to have device tree support. It seems to be older code, but is way
simpler, and seems to be targetted at similar hardware.

Best regards,

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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