linux-kernel - Re: [PATCH v3 25/30] ARM: dts: sun8i: h3: add thermal zone to H3

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Date:   Fri, 31 Aug 2018 11:14:05 +0200
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Philipp Rossak <embed3d@...il.com>
Cc:     lee.jones@...aro.org, robh+dt@...nel.org, mark.rutland@....com,
        wens@...e.org, linux@...linux.org.uk, jic23@...nel.org,
        knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        eugen.hristev@...rochip.com, rdunlap@...radead.org,
        vilhelm.gray@...il.com, clabbe.montjoie@...il.com,
        quentin.schulz@...tlin.com, geert+renesas@...der.be,
        lukas@...ner.de, icenowy@...c.io, arnd@...db.de,
        broonie@...nel.org, arnaud.pouliquen@...com,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH v3 25/30] ARM: dts: sun8i: h3: add thermal zone to H3

On Thu, Aug 30, 2018 at 05:45:13PM +0200, Philipp Rossak wrote:
> This patch adds the thermal zones to the H3. We have only one sensor and
> that is placed in the cpu.
> 
> Signed-off-by: Philipp Rossak <embed3d@...il.com>
> ---
>  arch/arm/boot/dts/sun8i-h3.dtsi    | 31 +++++++++++++++++++++++++++++++
>  arch/arm/boot/dts/sunxi-h3-h5.dtsi |  1 +
>  2 files changed, 32 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
> index 5b7994cb1471..954848d5df50 100644
> --- a/arch/arm/boot/dts/sun8i-h3.dtsi
> +++ b/arch/arm/boot/dts/sun8i-h3.dtsi
> @@ -78,6 +78,8 @@
>  			clock-names = "cpu";
>  			operating-points-v2 = <&cpu0_opp_table>;
>  			#cooling-cells = <2>;
> +			cooling-min-level = <0>;
> +			cooling-max-level = <15>;
>  		};
>  
>  		cpu@1 {
> @@ -102,6 +104,35 @@
>  		};
>  	};
>  
> +	thermal-zones {
> +		cpu-thermal {
> +			/* milliseconds */
> +			polling-delay-passive = <250>;
> +			polling-delay = <1000>;
> +			thermal-sensors = <&ths>;
> +
> +			trips {
> +				cpu_hot_trip: cpu-warm {
> +					temperature = <65000>;
> +					hysteresis = <2000>;
> +					type = "passive";
> +				};
> +				cpu_very_hot_trip: cpu-very-hot {
> +					temperature = <90000>;
> +					hysteresis = <2000>;
> +					type = "critical";
> +				};
> +			};

Where are those trip points coming from?

Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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