linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: sm7225-fairphone-fp4: Add PM6150L thermals

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Date: Tue, 9 Jan 2024 11:09:42 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Luca Weiss <luca.weiss@...rphone.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: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: qcom: sm7225-fairphone-fp4: Add PM6150L
 thermals



On 1/5/24 15:54, Luca Weiss wrote:
> Configure the thermals for the PA_THERM1, MSM_THERM, PA_THERM0,
> RFC_CAM_THERM, CAM_FLASH_THERM and QUIET_THERM thermistors connected to
> PM6150L.
> 
> Due to hardware constraints we can only register 4 zones with
> pm6150l_adc_tm, the other 2 we can register via generic-adc-thermal.

Ugh.. so the ADC can support more inputs than the ADC_TM that was
designed to ship alongside it can?

And that's why the "generic-adc-thermal"-provided zones need to
be polled?

> 
> The trip points can really only be considered as placeholders, more
> configuration with cooling etc. can be added later.
> 
> Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
> ---
[...]

I've read the sentence above, but..
> +		sdm-skin-thermal {
> +			polling-delay-passive = <1000>;
> +			polling-delay = <5000>;
> +			thermal-sensors = <&msm_therm_sensor>;
> +
> +			trips {
> +				active-config0 {
> +					temperature = <125000>;
> +					hysteresis = <1000>;
> +					type = "passive";

I don't fancy burnt fingers for dinner!

Konrad