linux-kernel - Re: [PATCH 2/3] ARM: dts: document the berlin enable-method property

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Date:	Thu, 03 Apr 2014 11:14:54 +0200
From:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>
To:	Jisheng Zhang <jszhang@...vell.com>
CC:	"sebastian.hesselbarth@...il.com" <sebastian.hesselbarth@...il.com>,
	"alexandre.belloni@...e-electrons.com" 
	<alexandre.belloni@...e-electrons.com>,
	Jimmy Xu <zmxu@...vell.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] ARM: dts: document the berlin enable-method property



On 03/04/2014 10:54, Antoine Ténart wrote:
> Jisheng,
>
> On 03/04/2014 10:22, Jisheng Zhang wrote:
>> Hi,
>>
>> On Thu, 3 Apr 2014 01:08:15 -0700
>> Antoine Ténart <antoine.tenart@...e-electrons.com> wrote:
>>
>>> Signed-off-by: Antoine Ténart <antoine.tenart@...e-electrons.com>
>>> ---
>>>   Documentation/devicetree/bindings/arm/cpus.txt | 2 ++
>>>   1 file changed, 2 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/arm/cpus.txt
>>> b/Documentation/devicetree/bindings/arm/cpus.txt index
>>> 333f4aea3029..a9e42a2dbc99 100644 ---
>>> a/Documentation/devicetree/bindings/arm/cpus.txt +++
>>> b/Documentation/devicetree/bindings/arm/cpus.txt @@ -185,6 +185,8 @@
>>> nodes
>>> to be present and contain the properties described below.
>>> "qcom,gcc-msm8660"
>>>                   "qcom,kpss-acc-v1"
>>>                   "qcom,kpss-acc-v2"
>>> +                "marvell,88de31-smp" - cpu-core handling for
>>
>> why not "marvell,berlin-smp"?
>
> We have SMP on the BG2 and the BG2Q currently. Future boards may not be
> compatible with this method (BG3 ?), I think "marvell,berlin-smp" is too
> generic.
>
> We could use "marvell,88de31xx-smp" as Alexandre suggested.

"marvell,88de31xx-smp" is not a good choice too, since futur SoC may 
match the "xx" and not use this method. A better way should be to use 
the first SoC implementing the feature, so "marvell,88de3100".

Antoine

-- 
Antoine Ténart, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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