linux-kernel - Re: [RFC PATCH 3/5] arm64: dts: Add Cavium ThunderX specific PMU

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Date:	Thu, 14 Jan 2016 17:06:05 +0100
From:	Jan Glauber <jan.glauber@...iumnetworks.com>
To:	Mark Rutland <mark.rutland@....com>
CC:	Jan Glauber <jan.glauber@...il.com>,
	Will Deacon <will.deacon@....com>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC PATCH 3/5] arm64: dts: Add Cavium ThunderX specific PMU

On Thu, Jan 14, 2016 at 02:47:12PM +0000, Mark Rutland wrote:
> Hi,
> 
> As it's the middle of the merge window, it will be a while before this
> sees a full review. In future, it would be better to wait until -rc1
> before posting new patches (appropriately rebased).

OK, fair enough. I'll repost after -rc1 if the patches don't fit
anymore.

> I did spot one thing however.
> 
> On Thu, Jan 14, 2016 at 01:55:43PM +0100, Jan Glauber wrote:
> > Add a compatible string for the Cavium ThunderX PMU.
> > 
> > Signed-off-by: Jan Glauber <jglauber@...ium.com>
> > ---
> >  Documentation/devicetree/bindings/arm/pmu.txt | 1 +
> >  arch/arm64/boot/dts/cavium/thunder-88xx.dtsi  | 5 +++++
> >  2 files changed, 6 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/arm/pmu.txt b/Documentation/devicetree/bindings/arm/pmu.txt
> > index 5651883..9bd0a33 100644
> > --- a/Documentation/devicetree/bindings/arm/pmu.txt
> > +++ b/Documentation/devicetree/bindings/arm/pmu.txt
> > @@ -25,6 +25,7 @@ Required properties:
> >  	"qcom,scorpion-pmu"
> >  	"qcom,scorpion-mp-pmu"
> >  	"qcom,krait-pmu"
> > +	"cavium,thunderx-pmu"
> >  - interrupts : 1 combined interrupt or 1 per core. If the interrupt is a per-cpu
> >                 interrupt (PPI) then 1 interrupt should be specified.
> >  
> > diff --git a/arch/arm64/boot/dts/cavium/thunder-88xx.dtsi b/arch/arm64/boot/dts/cavium/thunder-88xx.dtsi
> > index 9cb7cf9..84ac556 100644
> > --- a/arch/arm64/boot/dts/cavium/thunder-88xx.dtsi
> > +++ b/arch/arm64/boot/dts/cavium/thunder-88xx.dtsi
> > @@ -360,6 +360,11 @@
> >  		             <1 10 0xff01>;
> >  	};
> >  
> > +	pmu {
> > +		compatible = "cavium,thunderx-pmu", "arm,armv8-pmuv3";
> 
> In current dts, "cavium,thunder" is used as the CPU compatible string.
> 
> Please decide whether you want to call the CPU "Thunder", or
> "Thunder-X", and ensure that all compatible strings are consistent.

I think we should keep the already existing name then.

thanks,
Jan