linux-kernel - Re: [PATCH v2 31/31] arm64: dts: qcom: sm8650-*: Remove thermal zone polling delays

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Date: Fri, 10 May 2024 13:47:17 +0100
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>,
 Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, cros-qcom-dts-watchers@...omium.org,
 Krzysztof Kozlowski <krzk+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 31/31] arm64: dts: qcom: sm8650-*: Remove thermal zone
 polling delays

On 10/05/2024 12:59, Konrad Dybcio wrote:
> All of the thermal zone suppliers are interrupt-driven, remove the
> bogus and unnecessary polling that only wastes CPU time.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>   arch/arm64/boot/dts/qcom/sm8650.dtsi | 88 +++++++-----------------------------
>   1 file changed, 16 insertions(+), 72 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8650.dtsi b/arch/arm64/boot/dts/qcom/sm8650.dtsi
> index 62a6e77730bc..39e789b21acc 100644
> --- a/arch/arm64/boot/dts/qcom/sm8650.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8650.dtsi
> @@ -5328,8 +5328,6 @@ compute-cb@12 {
>   
>   	thermal-zones {
>   		aoss0-thermal {
> -			polling-delay-passive = <0>;
> -			polling-delay = <0>;

Commit log doesn't really match the values being subtracted

polling-delay:
   $ref: /schemas/types.yaml#/definitions/uint32
   description:
     The maximum number of milliseconds to wait between polls when
     checking this thermal zone. Setting this to 0 disables the polling
     timers setup by the thermal framework and assumes that the thermal
     sensors in this zone support interrupts.