linux-kernel - Re: [PATCH v1 1/3] arm64: dts: amlogic: a1: add cooling-cells for DVFS feature

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Date: Thu, 28 Mar 2024 15:08:42 +0100
From: neil.armstrong@...aro.org
To: Dmitry Rokosov <ddrokosov@...utedevices.com>, jbrunet@...libre.com,
 mturquette@...libre.com, khilman@...libre.com,
 martin.blumenstingl@...glemail.com, glaroque@...libre.com,
 rafael@...nel.org, daniel.lezcano@...aro.org, rui.zhang@...el.com,
 lukasz.luba@....com, robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
 conor+dt@...nel.org
Cc: kernel@...utedevices.com, rockosov@...il.com,
 linux-amlogic@...ts.infradead.org, linux-pm@...r.kernel.org,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v1 1/3] arm64: dts: amlogic: a1: add cooling-cells for
 DVFS feature

On 28/03/2024 14:44, Dmitry Rokosov wrote:
> It's used for CPU with DVFS feature to specify minimum and maximum
> cooling state used in the reference.
> Without these values DVFS will not work and dtbs_check will raise the
> error.
> 
> Signed-off-by: Dmitry Rokosov <ddrokosov@...utedevices.com>
> ---
>   arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> index fbee986421f1..f65d4a77ee52 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> @@ -32,6 +32,7 @@ cpu0: cpu@0 {
>   			reg = <0x0 0x0>;
>   			enable-method = "psci";
>   			next-level-cache = <&l2>;
> +			#cooling-cells = <2>;
>   		};
>   
>   		cpu1: cpu@1 {
> @@ -40,6 +41,7 @@ cpu1: cpu@1 {
>   			reg = <0x0 0x1>;
>   			enable-method = "psci";
>   			next-level-cache = <&l2>;
> +			#cooling-cells = <2>;
>   		};
>   
>   		l2: l2-cache0 {

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>