linux-kernel - Re: [PATCH] arm64: dts: add #cooling-cells to CPU nodes

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Date:   Thu, 11 Jan 2018 08:38:30 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Arnd Bergmann <arnd@...db.de>
CC:     Matthias Brugger <matthias.bgg@...il.com>, <arm@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Daniel Kurtz <djkurtz@...omium.org>,
        Andrew-sh Cheng <andrew-sh.cheng@...iatek.com>,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        "dawei.chien@...iatek.com" <dawei.chien@...iatek.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: add #cooling-cells to CPU nodes

On Wed, 2018-01-10 at 22:06 +0100, Arnd Bergmann wrote:
> dtc complains about the lack of #coolin-cells properties for the
> CPU nodes that are referred to as "cooling-device":
> 
> arch/arm64/boot/dts/mediatek/mt8173-evb.dtb: Warning (cooling_device_property): Missing property '#cooling-cells' in node /cpus/cpu@0 or bad phandle (referred from /thermal-zones/cpu_thermal/cooling-maps/map@0:cooling-device[0])
> arch/arm64/boot/dts/mediatek/mt8173-evb.dtb: Warning (cooling_device_property): Missing property '#cooling-cells' in node /cpus/cpu@100 or bad phandle (referred from /thermal-zones/cpu_thermal/cooling-maps/map@1:cooling-device[0])
> 
> Apparently this property must be '<2>' to match the binding.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
> If this looks ok, I'd apply it directly to the fixes branch
> for 4.15, as the warning is one that was introduced in this
> release.
> ---
>  arch/arm64/boot/dts/mediatek/mt8173.dtsi | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> index b477ad790071..9fbe4705ee88 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> @@ -155,6 +155,7 @@
>  			reg = <0x000>;
>  			enable-method = "psci";
>  			cpu-idle-states = <&CPU_SLEEP_0>;
> +			#cooling-cells = <2>;
>  			clocks = <&infracfg CLK_INFRA_CA53SEL>,
>  				 <&apmixedsys CLK_APMIXED_MAINPLL>;
>  			clock-names = "cpu", "intermediate";
> @@ -179,6 +180,7 @@
>  			reg = <0x100>;
>  			enable-method = "psci";
>  			cpu-idle-states = <&CPU_SLEEP_0>;
> +			#cooling-cells = <2>;
>  			clocks = <&infracfg CLK_INFRA_CA57SEL>,
>  				 <&apmixedsys CLK_APMIXED_MAINPLL>;
>  			clock-names = "cpu", "intermediate";

Tested-by: Chunfeng Yun <chunfeng.yun@...iatek.com>