linux-kernel - Re: [PATCH v2 2/4] arm64: dts: qcom: sc7180: Disable charger thermal for lazor

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Date:   Thu, 25 Feb 2021 12:13:49 -0800
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     devicetree@...r.kernel.org,
        Douglas Anderson <dianders@...omium.org>,
        linux-arm-msm@...r.kernel.org, Stephen Boyd <swboyd@...omium.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/4] arm64: dts: qcom: sc7180: Disable charger thermal
 for lazor

> Subject: [PATCH v2 2/4] arm64: dts: qcom: sc7180: Disable charger thermal for lazor

Should be 'Disable charger thermal *zone* for lazor'

Maybe Bjorn can fix this when applying if no respin is needed.

On Thu, Feb 25, 2021 at 10:33:35AM -0800, Matthias Kaehlcke wrote:
> Lazor is stuffed with a 47k NTC as thermistor for the charger
> temperature which currently isn't supported by the PM6150 ADC
> driver. Disable the charger thermal zone to avoid the use of
> bogus temperature values.
> 
> Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
> ---
> 
> Changes in v2:
> - disable the thermal zone instead of deleting the zone and ADC nodes
> - updated subject and commit message
> 
>  arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts | 9 +++++++++
>  arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts | 9 +++++++++
>  arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r3.dts | 9 +++++++++
>  3 files changed, 27 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts
> index 30e3e769d2b4..5c997cd90069 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts
> @@ -14,6 +14,15 @@ / {
>  	compatible = "google,lazor-rev0", "qcom,sc7180";
>  };
>  
> +/*
> + * Lazor is stuffed with a 47k NTC as charger thermistor which currently is
> + * not supported by the PM6150 ADC driver. Disable the charger thermal zone
> + * to avoid using bogus temperature values.
> + */
> +&charger_thermal {
> +	status = "disabled";
> +};
> +
>  &pp3300_hub {
>  	/* pp3300_l7c is used to power the USB hub */
>  	/delete-property/regulator-always-on;
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts
> index c2ef06367baf..d9fbcc7bc5bd 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts
> @@ -14,6 +14,15 @@ / {
>  	compatible = "google,lazor-rev1", "google,lazor-rev2", "qcom,sc7180";
>  };
>  
> +/*
> + * Lazor is stuffed with a 47k NTC as charger thermistor which currently is
> + * not supported by the PM6150 ADC driver. Disable the charger thermal zone
> + * to avoid using bogus temperature values.
> + */
> +&charger_thermal {
> +	status = "disabled";
> +};
> +
>  &pp3300_hub {
>  	/* pp3300_l7c is used to power the USB hub */
>  	/delete-property/regulator-always-on;
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r3.dts b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r3.dts
> index 1b9d2f46359e..19e69adb9e04 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r3.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r3.dts
> @@ -13,3 +13,12 @@ / {
>  	model = "Google Lazor (rev3+)";
>  	compatible = "google,lazor", "qcom,sc7180";
>  };
> +
> +/*
> + * Lazor is stuffed with a 47k NTC as charger thermistor which currently is
> + * not supported by the PM6150 ADC driver. Disable the charger thermal zone
> + * to avoid using bogus temperature values.
> + */
> +&charger_thermal {
> +	status = "disabled";
> +};
> -- 
> 2.30.0.617.g56c4b15f3c-goog
>