linux-kernel - Re: [PATCH] arm64: dts: qcom: sc8280xp: Introduce additional tsens instances

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Date: Fri, 19 Jan 2024 00:31:06 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Bjorn Andersson <quic_bjorande@...cinc.com>,
 Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sc8280xp: Introduce additional tsens
 instances



On 1/19/24 00:00, Bjorn Andersson wrote:
> The SC8280XP contains two additional tsens instances, providing among
> other things thermal measurements for the GPU.
> 
> Add these and a GPU thermal-zone.
> 
> Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
> ---
>   arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 37 ++++++++++++++++++++++++++++++++++
>   1 file changed, 37 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> index febf28356ff8..68b5ac0339a0 100644
> --- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> @@ -4033,6 +4033,28 @@ tsens1: thermal-sensor@...5000 {
>   			#thermal-sensor-cells = <1>;
>   		};
>   
> +		tsens2: thermal-sensor@...1000 {
> +			compatible = "qcom,sc8280xp-tsens", "qcom,tsens-v2";
> +			reg = <0 0x0c251000 0 0x1ff>, /* TM */
> +			      <0 0x0c224000 0 0x8>; /* SROT */

I've previously called for removing these comments that we've been
copypasting around for years and years, and I'm gonna stand by that :P

[...]

>   
> +		gpu-thermal {
> +			polling-delay-passive = <250>;
> +			polling-delay = <1000>;

Hm, did tsens only gain support of non-polled reporting with 8450?

If not, we should definitely update all the relevant SoCs.

Konrad