linux-kernel - Re: [PATCH] [RESEND] arm64: dts: mt8173: Add dynamic power node.

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Message-ID: <4aaf8cee-eaa2-5de4-37f0-094b9bc8da22@linaro.org>
Date:   Thu, 5 Dec 2019 17:00:20 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     michael.kao@...iatek.com, Zhang Rui <rui.zhang@...el.com>,
        Eduardo Valentin <edubezval@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>, hsinyi@...omium.org,
        linux-pm@...r.kernel.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Dawei Chien <dawei.chien@...iatek.com>
Subject: Re: [PATCH] [RESEND] arm64: dts: mt8173: Add dynamic power node.


Hi Michael,


On 22/11/2019 10:06, michael.kao@...iatek.com wrote:
> From: "michael.kao" <michael.kao@...iatek.com>
> 
> This device node is for calculating dynamic power in mW.
> Since mt8173 has two clusters, there are two dynamic power
> coefficient as well.

Are you sure about the values? Usually, Big is ~x4 little, here it is ~x2.


> Signed-off-by: Dawei Chien <dawei.chien@...iatek.com>
> Signed-off-by: Michael.Kao <michael.kao@...iatek.com>
> 
> ---
>  arch/arm64/boot/dts/mediatek/mt8173.dtsi | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> index 15f1842f6df3..b03ca5a71338 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> @@ -157,6 +157,7 @@
>  			enable-method = "psci";
>  			cpu-idle-states = <&CPU_SLEEP_0>;
>  			#cooling-cells = <2>;
> +			dynamic-power-coefficient = <263>;
>  			clocks = <&infracfg CLK_INFRA_CA53SEL>,
>  				 <&apmixedsys CLK_APMIXED_MAINPLL>;
>  			clock-names = "cpu", "intermediate";
> @@ -170,6 +171,7 @@
>  			enable-method = "psci";
>  			cpu-idle-states = <&CPU_SLEEP_0>;
>  			#cooling-cells = <2>;
> +			dynamic-power-coefficient = <263>;
>  			clocks = <&infracfg CLK_INFRA_CA53SEL>,
>  				 <&apmixedsys CLK_APMIXED_MAINPLL>;
>  			clock-names = "cpu", "intermediate";
> @@ -183,6 +185,7 @@
>  			enable-method = "psci";
>  			cpu-idle-states = <&CPU_SLEEP_0>;
>  			#cooling-cells = <2>;
> +			dynamic-power-coefficient = <530>;
>  			clocks = <&infracfg CLK_INFRA_CA72SEL>,
>  				 <&apmixedsys CLK_APMIXED_MAINPLL>;
>  			clock-names = "cpu", "intermediate";
> @@ -196,6 +199,7 @@
>  			enable-method = "psci";
>  			cpu-idle-states = <&CPU_SLEEP_0>;
>  			#cooling-cells = <2>;
> +			dynamic-power-coefficient = <530>;
>  			clocks = <&infracfg CLK_INFRA_CA72SEL>,
>  				 <&apmixedsys CLK_APMIXED_MAINPLL>;
>  			clock-names = "cpu", "intermediate";
> 


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