linux-kernel - Re: [PATCH 1/4] arm64: dts: qcom: sm8450: move SDHCI pin configuration to DTSI

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Date:   Wed, 26 Oct 2022 22:11:13 +0200
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...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
Cc:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: Re: [PATCH 1/4] arm64: dts: qcom: sm8450: move SDHCI pin
 configuration to DTSI


On 26/10/2022 22:03, Krzysztof Kozlowski wrote:
> The SDHCI pin configuration/mux nodes are actually common to all
> upstreamed boards, so define them in SoC DTSI to reduce code
> duplication.
>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@...ainline.org>


Konrad

>
> In theory drive strength belongs to the board DTS, not SoC DTSI, but I
> am following the advice here:
> https://lore.kernel.org/lkml/CAD=FV=VUL4GmjaibAMhKNdpEso_Hg_R=XeMaqah1LSj_9-Ce4Q@mail.gmail.com/
> ---
>   .../qcom/sm8450-sony-xperia-nagara-pdx223.dts | 20 -------------------
>   arch/arm64/boot/dts/qcom/sm8450.dtsi          | 20 +++++++++++++++++++
>   2 files changed, 20 insertions(+), 20 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara-pdx223.dts b/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara-pdx223.dts
> index 82918c2d956f..718c690af8ad 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara-pdx223.dts
> +++ b/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara-pdx223.dts
> @@ -572,26 +572,6 @@ &spi10 {
>   &tlmm {
>   	gpio-reserved-ranges = <28 4>;
>   
> -	sdc2_default_state: sdc2-default-state {
> -		clk-pins {
> -			pins = "sdc2_clk";
> -			drive-strength = <16>;
> -			bias-disable;
> -		};
> -
> -		cmd-pins {
> -			pins = "sdc2_cmd";
> -			drive-strength = <16>;
> -			bias-pull-up;
> -		};
> -
> -		data-pins {
> -			pins = "sdc2_data";
> -			drive-strength = <16>;
> -			bias-pull-up;
> -		};
> -	};
> -
>   	ts_int_default: ts-int-default-state {
>   		pins = "gpio23";
>   		function = "gpio";
> diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> index 1d1775334575..1df5c964c6f7 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> @@ -2515,6 +2515,26 @@ tlmm: pinctrl@...0000 {
>   			gpio-ranges = <&tlmm 0 0 211>;
>   			wakeup-parent = <&pdc>;
>   
> +			sdc2_default_state: sdc2-default-state {
> +				clk-pins {
> +					pins = "sdc2_clk";
> +					drive-strength = <16>;
> +					bias-disable;
> +				};
> +
> +				cmd-pins {
> +					pins = "sdc2_cmd";
> +					drive-strength = <16>;
> +					bias-pull-up;
> +				};
> +
> +				data-pins {
> +					pins = "sdc2_data";
> +					drive-strength = <16>;
> +					bias-pull-up;
> +				};
> +			};
> +
>   			sdc2_sleep_state: sdc2-sleep-state {
>   				clk-pins {
>   					pins = "sdc2_clk";