linux-kernel - Re: [PATCH] arm64: dts: qcom: sc8280xp-pmics: fix pon compatible and registers

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Date:   Mon, 3 Apr 2023 11:18:07 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Johan Hovold <johan+linaro@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sc8280xp-pmics: fix pon compatible and
 registers

On 27/03/2023 14:29, Johan Hovold wrote:
> The pmk8280 PMIC PON peripheral is gen3 and uses two sets of registers;
> hlos and pbs.
> 
> This specifically fixes the following error message during boot when the
> pbs registers are not defined:
> 
> 	PON_PBS address missing, can't read HW debounce time
> 
> Note that this also enables the spurious interrupt workaround introduced
> by commit 0b65118e6ba3 ("Input: pm8941-pwrkey - add software key press
> debouncing support") (which may or may not be needed).
> 
> Fixes: ccd3517faf18 ("arm64: dts: qcom: sc8280xp: Add reference device")
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> ---
>  arch/arm64/boot/dts/qcom/sc8280xp-pmics.dtsi | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-pmics.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp-pmics.dtsi
> index c35e7f6bd657..a0ba535bb6c9 100644
> --- a/arch/arm64/boot/dts/qcom/sc8280xp-pmics.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc8280xp-pmics.dtsi
> @@ -59,8 +59,9 @@ pmk8280: pmic@0 {
>  		#size-cells = <0>;
>  
>  		pmk8280_pon: pon@...0 {
> -			compatible = "qcom,pm8998-pon";
> -			reg = <0x1300>;
> +			compatible = "qcom,pmk8350-pon";

Same comment as Dmitry's. There is no compatible "qcom,pmk8350-pon"
ccd3517faf18, therefore indicated backport (through AUTOSEL) will lead
to invalid stable kernel.

You must drop the Fixes tag, because this cannot be backported.

Best regards,
Krzysztof