linux-kernel - Re: [PATCH 2/2] DTS: dra7: Add "opp_high" opp node to support 1.5 GHz SoC operation

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Date:   Sat, 4 Feb 2017 00:06:15 +0100
From:   Lukasz Majewski <lukma@...x.de>
To:     Nishanth Menon <nm@...com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Tony Lindgren <tony@...mide.com>,
        Benoît Cousson <bcousson@...libre.com>,
        Russell King <linux@...linux.org.uk>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        <linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Kishon Vijay Abraham I <kishon@...com>
Subject: Re: [PATCH 2/2] DTS: dra7: Add "opp_high" opp node to support 1.5
 GHz SoC operation

Hi Nishanth,

> On 02/03/2017 09:24 AM, Lukasz Majewski wrote:
> > The "opp_high" property brings support for 1.5 GHz CPU frequency
> > for TI's am57xx line of processors.
> >
> > Signed-off-by: Lukasz Majewski <lukma@...x.de>
> > ---
> >  arch/arm/boot/dts/dra7.dtsi | 5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/dra7.dtsi
> > b/arch/arm/boot/dts/dra7.dtsi index a860a56..5e678cd 100644
> > --- a/arch/arm/boot/dts/dra7.dtsi
> > +++ b/arch/arm/boot/dts/dra7.dtsi
> > @@ -108,6 +108,11 @@
> >  			opp-hz = /bits/ 64 <1176000000>;
> >  			opp-microvolt = <1160000 885000 1160000>;
> >  		};
> > +
> > +		opp_high@...0000000 {
> > +			opp-hz = /bits/ 64 <1500000000>;
> > +			opp-microvolt = <1210000 950000 1250000>;
> > +		};
> >  	};
> >
> >  	/*
> >
> Please keep this out of the way till we get the AVS class0 integrated 
> in. devices wont be save at 1.5GHz without the opp powerdomain + AVS 
> Class0 implementation.
> 

Yes, correct. My AM5728 works with this opp, but AM5718 hangs when this
frequency is enabled.



Best regards,

Lukasz Majewski

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