linux-kernel - Re: [PATCH v5 2/9] arm64: dts: allwinner: h6: Add thermal trip points/cooling map

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Date:   Mon, 20 Apr 2020 15:46:04 +0200
From:   Ondřej Jirman <megous@...ous.com>
To:     Clément Péron <peron.clem@...il.com>
Cc:     Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH v5 2/9] arm64: dts: allwinner: h6: Add thermal trip
 points/cooling map

Hi,

On Mon, Apr 20, 2020 at 03:00:14PM +0200, Clément Péron wrote:
> From: Ondrej Jirman <megous@...ous.com>
> 
> This enables passive cooling by down-regulating CPU voltage
> and frequency.

Does this not produce a lot of warnings for you during compilation?

regards,
	o.

> Signed-off-by: Ondrej Jirman <megous@...ous.com>
> Signed-off-by: Clément Péron <peron.clem@...il.com>
> ---
>  arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 24 ++++++++++++++++++++
>  1 file changed, 24 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
> index 370e77b86fe1..60da1627772b 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
> @@ -964,6 +964,30 @@
>  			polling-delay-passive = <0>;
>  			polling-delay = <0>;
>  			thermal-sensors = <&ths 0>;
> +
> +			trips {
> +				cpu_alert: cpu-alert {
> +					temperature = <85000>;
> +					hysteresis = <2000>;
> +					type = "passive";
> +				};
> +
> +				cpu-crit {
> +					temperature = <100000>;
> +					hysteresis = <0>;
> +					type = "critical";
> +				};
> +			};
> +
> +			cooling-maps {
> +				map0 {
> +					trip = <&cpu_alert>;
> +					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> +							 <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> +							 <&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> +							 <&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> +				};
> +			};
>  		};
>  
>  		gpu-thermal {
> -- 
> 2.20.1
>