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

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Message-ID: <e398ff96-dca7-7934-70b1-9a95c01d3b27@ti.com>
Date:   Fri, 3 Feb 2017 10:56:57 -0600
From:   Dave Gerlach <d-gerlach@...com>
To:     Lukasz Majewski <lukma@...x.de>, 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>
CC:     <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

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(+)
>

This can't be blindly enabled for all am57xx SoCs, there is a forthcoming 
ti-cpufreq [1] driver that is needed that will decided which OPPs can and cannot 
be enabled for the specific variant in use.

Regards,
Dave

[1] http://www.spinics.net/lists/devicetree/msg158967.html

> 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>;
> +		};
>  	};
>
>  	/*
>