linux-kernel - Re: [PATCH v2 6/6] arm64: dts: qcom: msm8956-loire: Add SD Card Detect to SDC2 pin states

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Date: Mon, 22 Jan 2024 12:48:27 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Marijn Suijten <marijn.suijten@...ainline.org>,
 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, Luca Weiss <luca@...tu.xyz>,
 Adam Skladowski <a39.skl@...il.com>, Konrad Dybcio
 <konrad.dybcio@...aro.org>, Martin Botka <martin.botka@...ainline.org>,
 Jami Kettunen <jami.kettunen@...ainline.org>, linux-arm-msm@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/6] arm64: dts: qcom: msm8956-loire: Add SD Card
 Detect to SDC2 pin states

Il 21/01/24 23:33, Marijn Suijten ha scritto:
> In addition to the SDC2 pins, set the SD Card Detect pin in a sane state
> to be used as an interrupt when an SD Card is slotted in or removed.
> 
> Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
> ---
>   arch/arm64/boot/dts/qcom/msm8956-sony-xperia-loire.dtsi | 17 +++++++++++++++++
>   1 file changed, 17 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8956-sony-xperia-loire.dtsi b/arch/arm64/boot/dts/qcom/msm8956-sony-xperia-loire.dtsi
> index b0b83edd3627..75412e37334c 100644
> --- a/arch/arm64/boot/dts/qcom/msm8956-sony-xperia-loire.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8956-sony-xperia-loire.dtsi
> @@ -264,10 +264,27 @@ &sdhc_1 {
>   	status = "okay";
>   };
>   
> +&sdc2_off_state {
> +	sd-cd-pins {
> +		pins = "gpio100";
> +		function = "gpio";
> +		drive-strength = <2>;
> +		bias-disable;
> +	};

Are you sure that you really don't want card detect during system suspend?

You could simply add a sdc2-cd-pins out of sdc2_{on,off}_state and add use it for
both default and sleep.

pinctrl-0 = <&sdc2_on_state>, <&sdc2_card_det_n>;
pinctrl-1 = <&sdc2_off_state>;

Cheers,
Angelo

> +};
> +
>   &sdc2_on_state {
>   	clk-pins {
>   		drive-strength = <10>;
>   	};
> +
> +	sd-cd-pins {
> +		pins = "gpio100";
> +		function = "gpio";
> +		drive-strength = <2>;
> +		input-enable;
> +		bias-pull-up;
> +	};
>   };
>   
>   &sdhc_2 {
>