netdev - Re: [PATCHv2 net-next 01/16] dt-bindings: net: update Marvell PPv2 binding for PPv2.2 support

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Message-ID: <20170221111246.2718c21a@free-electrons.com>
Date:   Tue, 21 Feb 2017 11:12:46 +0100
From:   Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     Rob Herring <robh@...nel.org>, Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, Yehuda Yitschak <yehuday@...vell.com>,
        Jason Cooper <jason@...edaemon.net>,
        Pawel Moll <pawel.moll@....com>,
        Ian Campbell <ijc+devicetree@...lion.org.uk>,
        netdev@...r.kernel.org, Hanna Hawa <hannah@...vell.com>,
        Nadav Haklai <nadavh@...vell.com>,
        Andrew Lunn <andrew@...n.ch>,
        Kumar Gala <galak@...eaurora.org>,
        Gregory Clement <gregory.clement@...e-electrons.com>,
        Stefan Chulski <stefanc@...vell.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-arm-kernel@...ts.infradead.org,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Subject: Re: [PATCHv2 net-next 01/16] dt-bindings: net: update Marvell PPv2
 binding for PPv2.2 support

Hello,

On Tue, 14 Feb 2017 15:25:03 +0100, Thomas Petazzoni wrote:

> I'll try to get some more information about this, but I suspect this is
> one case where we don't yet fully understand how all the HW works and
> what all registers are doing, so it's hard to do a perfect DT binding
> from day 1.

So I've looked into this more closely, and after drawing a diagram of
all the register areas, I came up with a much more reduced area, with
only networking related registers: starting at 0x129000 for a size of
0xb000. So now the DT node looks like this:

+                       cpm_ethernet: ethernet@0 {
+                               compatible = "marvell,armada-7k-pp22";
+                               reg = <0x0 0x100000>, <0x129000 0xb000>;

This will be part of my next iteration.

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com