linux-kernel - Re: [RFC v1 0/5] ARM: Initial support for Marvell Armada 1500

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Date:	Tue, 27 Aug 2013 18:51:29 +0200
From:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	Mark Rutland <mark.rutland@....com>, Andrew Lunn <andrew@...n.ch>,
	Russell King <linux@....linux.org.uk>,
	Ian Campbell <ian.campbell@...rix.com>,
	Pawel Moll <pawel.moll@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	linux-kernel@...r.kernel.org,
	Rob Herring <rob.herring@...xeda.com>,
	devicetree@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-arm-kernel@...ts.infradead.org,
	Jason Cooper <jason@...edaemon.net>
Subject: Re: [RFC v1 0/5] ARM: Initial support for Marvell Armada 1500

Dear Sebastian Hesselbarth,

On Tue, 27 Aug 2013 18:45:45 +0200, Sebastian Hesselbarth wrote:

> > After talking a bit with engineers within Marvell that work on this
> > SoC, I'm inclined to think that using mach-mvebu for this family of SoC
> > is not a good idea.
> 
> Thomas,
> 
> thanks for the info below. Reading a little bit through the GPL'ed
> source, I also quickly came to the same conclusion. It is more likely
> we can reuse some stuff from other SoCs than Orion or Armada 370/XP.

Yes, many of the IP blocks are for example DesignWare IPs, or ARM IPs
in the case of the Cortex-A based variants.

> > The codename used for those Armada 1500 SOCs is "Berlin", so a name
> > like mach-berlin, or mach-mvberlin (if we want to keep 'mv' to identify
> > the founder) seems like a good name.
> 
> I have already moved it under mach-mv88de3xxx as for now, all SoCs
> Marvell is providing as DE (Digital Entertainment) fit in that. I like
> mach-codename style more than plain numbers, maybe I rename the folder
> to mach-berlin before posting.

I also like mach-berlin a bit more than mach-mve88de3xxx, for a very
silly reason: when during a discussion you have to say mach-mv88de3xxx,
it's pretty annoying. We already have the horrible mach-mv78xx0, let's
not add more of this :)

> Speaking of "berlin", they found a 2WW bomb in my home town center today
> and are evacuating apartments. Mine too, so it looks like I'll have
> some time to prepare v2 tonight..

Doh!

> > Also, to help us understand the organization of the family of SOCs, I
> > asked a few informations to Marvell, and here is what I could collect:
> >
> > """
> > BGxname		CPU core	codename	L2 cache controller	internal name
> > BG2		PJ4B		Armada1500	Tauros3			MV88DE3100
> > BG2-CT		Cortex-A9	N/A		PL310			N/A
> > BG3		Cortex-A15	N/A		CA15 integrated		N/A
> > """
> >
> > As was told that the Armada X or MV88DEx names are not used during
> > development, and what Marvell is really using are the BGxx names.
> 
> Ok, I'll add that info to Marvell SoC documentation also.

That'd be nice indeed.

Thanks!

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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