linux-kernel - Re: [PATCH v10 6/6] arm64/dts/mt8195: Add temperature mitigation threshold

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Message-ID: <daed4793-3aae-f927-5634-cfb876709f93@gmail.com>
Date:   Fri, 13 Jan 2023 12:49:49 +0100
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     bchihi@...libre.com, daniel.lezcano@...aro.org, rafael@...nel.org,
        amitk@...nel.org, rui.zhang@...el.com
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        khilman@...libre.com, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, james.lo@...iatek.com,
        rex-bc.chen@...iatek.com
Subject: Re: [PATCH v10 6/6] arm64/dts/mt8195: Add temperature mitigation
 threshold



On 12/01/2023 16:28, bchihi@...libre.com wrote:
> From: Balsam CHIHI <bchihi@...libre.com>
> 
> The mt8195 board has several hotspots around the CPUs. Specify the
> targeted temperature threshold when to apply the mitigation and define
> the associated cooling devices.
> 
> Signed-off-by: Balsam CHIHI <bchihi@...libre.com>
> ---
>   arch/arm64/boot/dts/mediatek/mt8195.dtsi | 153 ++++++++++++++++++++---
>   1 file changed, 137 insertions(+), 16 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> index 683e5057d68d..0d6642603095 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> @@ -14,6 +14,7 @@
>   #include <dt-bindings/pinctrl/mt8195-pinfunc.h>
>   #include <dt-bindings/power/mt8195-power.h>
>   #include <dt-bindings/reset/mt8195-resets.h>
> +#include <dt-bindings/thermal/thermal.h>
>   #include <dt-bindings/thermal/mediatek-lvts.h>
>   
>   / {
> @@ -2413,107 +2414,227 @@ dp_tx: dp-tx@...00000 {
>   
>   	thermal_zones: thermal-zones {
>   		cpu0-thermal {
> -			polling-delay = <0>;
> -			polling-delay-passive = <0>;
> +			polling-delay = <1000>;
> +			polling-delay-passive = <250>;
>   			thermal-sensors = <&lvts_mcu MT819x_MCU_LITTLE_CPU0>;

New line here please.

>   			trips {
> +				cpu0_alert: trip-alert {
> +					temperature = <85000>;
> +					hysteresis = <2000>;
> +					type = "passive";
> +				};

New line here please and on other trip point definitions.

Regards,
Matthias