linux-kernel - Re: [PATCH 3/5] arm64: dts: qcom: sm6125-seine: Provide regulators to SDHCI 1

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Date:   Fri, 23 Dec 2022 13:00:18 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Marijn Suijten <marijn.suijten@...ainline.org>,
        phone-devel@...r.kernel.org, Bjorn Andersson <andersson@...nel.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        Andy Gross <agross@...nel.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 3/5] arm64: dts: qcom: sm6125-seine: Provide regulators to
 SDHCI 1



On 22.12.2022 21:36, Marijn Suijten wrote:
> While SDHCI 1 appears to work out of the box, we cannot rely on the
> bootloader-enabled regulators nor expect them to remain enabled (e.g.
> when finally dropping pd_ignore_unused).
Unrelated, unused-yet-enabled (as far as Linux is concerned, anyway,
it doesn't know the state of smd rpm regulators unless you add
regulator-boot-on) regulators get swept by "regulator cleanup".

  Provide it the necessary l24
> and l11 regulators now that PM6125 regulators have been made available
> on this board.
> 
> As usual regulator voltages are decreased to the maximum voted by the
> downstream driver for safety.  No other hardware feeds off of these
> regulators anyway (except UFS, which isn't used on the seine board in
> favour of a DV6DMB eMMC card connected to SDHCI 1).
> 
> Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad
>  .../boot/dts/qcom/sm6125-sony-xperia-seine-pdx201.dts     | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm6125-sony-xperia-seine-pdx201.dts b/arch/arm64/boot/dts/qcom/sm6125-sony-xperia-seine-pdx201.dts
> index 15b43cff210b..eaddbe522695 100644
> --- a/arch/arm64/boot/dts/qcom/sm6125-sony-xperia-seine-pdx201.dts
> +++ b/arch/arm64/boot/dts/qcom/sm6125-sony-xperia-seine-pdx201.dts
> @@ -348,7 +348,8 @@ pm6125_l10: l10 {
>  
>  		pm6125_l11: l11 {
>  			regulator-min-microvolt = <1800000>;
> -			regulator-max-microvolt = <1952000>;
> +			regulator-max-microvolt = <1800000>;
> +			regulator-allow-set-load;
>  		};
>  
>  		pm6125_l12: l12 {
> @@ -413,7 +414,8 @@ pm6125_l23: l23 {
>  
>  		pm6125_l24: l24 {
>  			regulator-min-microvolt = <2944000>;
> -			regulator-max-microvolt = <3304000>;
> +			regulator-max-microvolt = <2950000>;
> +			regulator-allow-set-load;
>  		};
>  	};
>  };
> @@ -437,6 +439,8 @@ sd-cd-pins {
>  };
>  
>  &sdhc_1 {
> +	vmmc-supply = <&pm6125_l24>;
> +	vqmmc-supply = <&pm6125_l11>;
>  	status = "okay";
>  };
>