linux-kernel - Re: [RESEND PATCH 1/6] Document: bindings: DT: Add SMP enable method for MT6580 SoC platform

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Message-ID: <1436611086.17661.3.camel@mtksdaap41>
Date:	Sat, 11 Jul 2015 18:38:06 +0800
From:	Yingjoe Chen <yingjoe.chen@...iatek.com>
To:	Arnd Bergmann <arnd@...db.de>,
	Matthias Brugger <matthias.bgg@...il.com>
CC:	Matthias Brugger <matthias.bgg@...il.com>,
	Arnd Bergmann <arnd@...db.de>, <ibanezchen@...il.com>,
	<lorenzo.pieralisi@....com>, <linux@....linux.org.uk>,
	<heiko@...ech.de>, <catalin.marinas@....com>,
	<linux-kernel@...r.kernel.org>, <srv_wsdupstream@...iatek.com>,
	<marc.ceeeee@...il.com>, <robh+dt@...nel.org>,
	<linux-mediatek@...ts.infradead.org>, <galak@...eaurora.org>,
	<rchintakuntla@...ium.com>, <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RESEND PATCH 1/6] Document: bindings: DT: Add SMP enable
 method for MT6580 SoC platform

On Mon, 2015-06-29 at 11:03 +0800, Yingjoe Chen wrote:
> On Fri, 2015-06-19 at 02:01 +0800, Scott Shu wrote:
> > For MT6580 SoC platform, the secondary cores are in powered off state
> > as default, so compared with MT65xx series SoC, one new enable method
> > is needed. This method using the SPM (System Power Manager) inside
> > the SCYSYS to control the CPU power.
> > ---
> >  Documentation/devicetree/bindings/arm/cpus.txt | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt
> > index ac2903d..fb80b2e 100644
> > --- a/Documentation/devicetree/bindings/arm/cpus.txt
> > +++ b/Documentation/devicetree/bindings/arm/cpus.txt
> > @@ -194,6 +194,7 @@ nodes to be present and contain the properties described below.
> >  			    "marvell,armada-380-smp"
> >  			    "marvell,armada-390-smp"
> >  			    "marvell,armada-xp-smp"
> > +			    "mediatek,mt6580-smp"
> >  			    "mediatek,mt65xx-smp"
> >  			    "mediatek,mt81xx-tz-smp"
> >  			    "qcom,gcc-msm8660"
> 
> Hi
> 
> It seems we have 3 different kinds of cpu enable method now, and
> mt65xx-smp doesn't cover all mt65xx series. So maybe it make sense to
> change naming before it got merged.
> 
> Short summary for these methods:
> 
> mt65xx-smp:    	For mt65xx socs which wakeup all cores at boot.
> 		Tested on mt6589 by Matthias.
> mt6580-smp:     Only first core is alive at boot, so need to wakeup
> 		other cores using SPM. AFAIK only for mt6580 now.
> mt81xx-tz-smp:  For soc which wakeup all cores at boot, and have
> 		trustzone firmware. Suitable for mt8127, mt8135.


Hi Matthias, Arnd,

Any suggestion on the naming? Is it ok if I just rename mt65xx-smp to
mt6589-smp since that's the only one we tested?

Joe.C


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