linux-kernel - Re: [PATCH] ARM: dts: omap36xx: Remove turbo mode for 1GHz variants

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Message-Id: <8B45575E-A50B-407C-8920-D2A7E295DBE9@goldelico.com>
Date:   Sat, 9 Jan 2021 17:55:48 +0100
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Adam Ford <aford173@...il.com>
Cc:     Linux-OMAP <linux-omap@...r.kernel.org>, aford@...conembedded.com,
        Benoît Cousson <bcousson@...libre.com>,
        Tony Lindgren <tony@...mide.com>,
        Rob Herring <robh+dt@...nel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andreas Kemnade <andreas@...nade.info>
Subject: Re: [PATCH] ARM: dts: omap36xx: Remove turbo mode for 1GHz variants

Hi Adam,

> Am 09.01.2021 um 17:39 schrieb Adam Ford <aford173@...il.com>:
> 
> Previously, the 1GHz variants were marked as a turbo,
> because that variant has reduced thermal operating range.
> 
> Now that the thermal throttling is in place, it should be
> safe to remove the turbo-mode from the 1GHz variants, because
> the CPU will automatically slow if the thermal limit is reached.

Subject and description may be misunderstood in a way that 1GHz
is now disabled.

Rather the 1GHz OPP is now permanently enabled and does no longer
need to be manuall enabled through something like
/sys/devices/system/cpu/cpufreq/boost.

> 
> Signed-off-by: Adam Ford <aford173@...il.com>
> 
> diff --git a/arch/arm/boot/dts/logicpd-torpedo-som.dtsi b/arch/arm/boot/dts/logicpd-torpedo-som.dtsi
> index 3a5228562b0d..3451f9be104e 100644
> --- a/arch/arm/boot/dts/logicpd-torpedo-som.dtsi
> +++ b/arch/arm/boot/dts/logicpd-torpedo-som.dtsi
> @@ -70,6 +70,7 @@ nand@0,0 {
> 		gpmc,device-width = <2>;
> 		#address-cells = <1>;
> 		#size-cells = <1>;
> +		status = "disabled";

this does not seem to match the description?

> 	};
> };
> 
> -- 
> 2.25.1
> 

BR,
Nikolaus