linux-kernel - Re: [PATCHv2 0/5] Support for Marvell switches with integrated CPUs

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Message-ID: <5f93b0ad-0d45-1d9a-521b-581074dcd465@gmail.com>
Date:   Thu, 5 Jan 2017 11:52:12 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Chris Packham <Chris.Packham@...iedtelesis.co.nz>,
        Andrew Lunn <andrew@...n.ch>
Cc:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Jason Cooper <jason@...edaemon.net>,
        Gregory Clement <gregory.clement@...e-electrons.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Arnd Bergmann <arnd@...db.de>,
        Thierry Reding <treding@...dia.com>,
        Sudeep Holla <sudeep.holla@....com>,
        Juri Lelli <juri.lelli@....com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Kalyan Kinthada <Kalyan.Kinthada@...iedtelesis.co.nz>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCHv2 0/5] Support for Marvell switches with integrated CPUs

On 01/05/2017 11:46 AM, Chris Packham wrote:
> On 06/01/17 02:10, Andrew Lunn wrote:
>>> I'd love to see a switchdev driver but it's a huge task (and no I'm not
>>> committing to writing it). As it stands Marvell ship a switch SDK
>>> largely executes in userspace with a small kernel module providing some
>>> linkage to the underlying hardware.
>>
>> Is there any similarity to the mv88e6xxx family?
>>
>> If it was similar registers, just a different access mechanising, we
>> could probably extend the mv88e6xxx to support MMIO as well as MDIO.
> 
> No the prestera family of devices are considerably more powerful (and 
> complex) than the linkstreet devices.

I see, we have a similar situation with some of the Broadcom SoCs, the
BCM534xx/BCM5334x have a completely different integrated switching
engine that is not roboswitch compatible.

Thanks for the information, this is still valuable to have this
supported upstream.
-- 
Florian