linux-kernel - Re: [PATCH 14/18] ARM: mvebu: add support for the Armada 395 SoC family

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Date:	Thu, 28 Jul 2016 13:19:31 +0200
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Rob Herring <robh@...nel.org>
Cc:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Grzegorz Jaszczyk <jaz@...ihalf.com>,
	"devicetree\@vger.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel\@lists.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Mark Rutland <mark.rutland@....com>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Russell King - ARM Linux <linux@...linux.org.uk>,
	Marcin Wojtas <mw@...ihalf.com>,
	Lior Amsalem <alior@...vell.com>
Subject: Re: [PATCH 14/18] ARM: mvebu: add support for the Armada 395 SoC family

Hi Rob,
 
 On lun., juil. 25 2016, Thomas Petazzoni <thomas.petazzoni@...e-electrons.com> wrote:

> Hello,
>
> On Mon, 25 Jul 2016 10:12:43 -0500, Rob Herring wrote:
>
>> Yes, I get that, but that is only meaningful if you want to run an OS
>> that is only aware of 395 on a 398 SoC/board (though I'd guess the 390
>> compat is enough for that). Otherwise, that property is not really
>> meaningful as the additional nodes are enough to handle what is the
>> superset.
>> 
>> I would agree both are fine if both chips are in fact the same die,
>> just fused or packaged differently. I've seen a lot of chips that are
>> supposed to be sub/supersets of each other, but have different errata
>> lists because they are different die.
>
> Unfortunately HW vendors are rarely willing to publicly indicate whether
> the different chips in their families are actually the same die fused
> differently, or really different dies.

So do you want that we keep both "marvell,armada398" and
"marvell,armada395" or do you xant we use only "marvell,armada398" ?

Thanks,

Gregory


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

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