linux-kernel - Re: [PATCH v1 04/12] arm64: dts: msm8996: thermal: Add temperature sensors near major peripherals

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Message-ID: <20190220012456.GG2811@localhost.localdomain>
Date:   Tue, 19 Feb 2019 17:24:57 -0800
From:   Eduardo Valentin <edubezval@...il.com>
To:     Amit Kucheria <amit.kucheria@...aro.org>
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        bjorn.andersson@...aro.org, andy.gross@...aro.org,
        David Brown <david.brown@...aro.org>,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v1 04/12] arm64: dts: msm8996: thermal: Add temperature
 sensors near major peripherals

On Mon, Feb 18, 2019 at 06:05:18PM +0530, Amit Kucheria wrote:
> msm8996 has a total of 21 temperature sensors. Populate DT with
> information about them.
> 
> There are 2 sensors on each of the cpus - one on the top, the other
> below (we only expose one on the top in DT for now). For the GPU, we
> expose both, the one on the top and the one below.
> 
> Depending on the version of the silicon, sensor 2 is either placed near
> the L3 cache or the venus video decoder. It would've been nice to be
> able to be version-specific but we don't have DTs that differentiate the
> two versions of silicon yet.
> 
> Signed-off-by: Amit Kucheria <amit.kucheria@...aro.org>
> ---
>  arch/arm64/boot/dts/qcom/msm8996.dtsi | 98 +++++++++++++++++++++++++++
>  1 file changed, 98 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8996.dtsi b/arch/arm64/boot/dts/qcom/msm8996.dtsi
> index ae6e9f0778f0..8e36a39e1386 100644
> --- a/arch/arm64/boot/dts/qcom/msm8996.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8996.dtsi
> @@ -237,6 +237,104 @@
>  				};
>  			};
>  		};
> +
> +		gpu-thermal-top {
> +			polling-delay-passive = <250>;
> +			polling-delay = <1000>;
> +
> +			thermal-sensors = <&tsens1 6>;
> +
> +			trips {
> +				gpu1_alert0: trip-point@0 {
> +					temperature = <75000>;
> +					hysteresis = <2000>;
> +					type = "passive";

What is the cooling map for this?

> +				};
> +
> +				gpu1_crit: gpu_crit {
> +					temperature = <95000>;
> +					hysteresis = <2000>;
> +					type = "critical";
> +				};
> +			};
> +		};
> +
> +		gpu-thermal-bottom {
> +			polling-delay-passive = <250>;
> +			polling-delay = <1000>;
> +
> +			thermal-sensors = <&tsens1 7>;
> +
> +			trips {
> +				gpu2_alert0: trip-point@0 {
> +					temperature = <75000>;
> +					hysteresis = <2000>;
> +					type = "passive";
> +				};
> +
> +				gpu2_crit: gpu_crit {
> +					temperature = <95000>;
> +					hysteresis = <2000>;
> +					type = "critical";
> +				};
> +			};
> +		};
> +
> +		m4m-thermal {
> +			polling-delay-passive = <250>;
> +			polling-delay = <1000>;
> +
> +			thermal-sensors = <&tsens0 1>;
> +		};
> +
> +		l3_or_venus-thermal {
> +			polling-delay-passive = <250>;
> +			polling-delay = <1000>;
> +
> +			thermal-sensors = <&tsens0 2>;
> +		};
> +
> +		cluster0-l2-thermal {
> +			polling-delay-passive = <250>;
> +			polling-delay = <1000>;
> +
> +			thermal-sensors = <&tsens0 7>;
> +		};
> +
> +		cluster1-l2-thermal {
> +			polling-delay-passive = <250>;
> +			polling-delay = <1000>;
> +
> +			thermal-sensors = <&tsens0 12>;
> +		};
> +
> +		camera-thermal {
> +			polling-delay-passive = <250>;
> +			polling-delay = <1000>;
> +
> +			thermal-sensors = <&tsens1 1>;
> +		};
> +
> +		q6-dsp-thermal {
> +			polling-delay-passive = <250>;
> +			polling-delay = <1000>;
> +
> +			thermal-sensors = <&tsens1 2>;
> +		};
> +
> +		mem-thermal {
> +			polling-delay-passive = <250>;
> +			polling-delay = <1000>;
> +
> +			thermal-sensors = <&tsens1 3>;
> +		};
> +
> +		modemtx-thermal {
> +			polling-delay-passive = <250>;
> +			polling-delay = <1000>;
> +
> +			thermal-sensors = <&tsens1 4>;
> +		};
>  	};
>  
>  	timer {
> -- 
> 2.17.1
>