Re: [PATCH v3 1/3] arm64: dts: qcom: sdm845-shift-axolotl: Enable sdcard

[Vladimir Zapolskiy]

On 4/2/26 12:54, David Heidelberg via B4 Relay wrote:
> From: Casey Connolly <casey.connolly@xxxxxxxxxx>
>
> The SHIFT6mq features an sdcard slot, add it.
>
> Signed-off-by: Casey Connolly <casey.connolly@xxxxxxxxxx>
> Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>
> Co-developed-by: David Heidelberg <david@xxxxxxx>
> Signed-off-by: David Heidelberg <david@xxxxxxx>
> ---
>   arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 44 +++++++++++++++++++++++
>   1 file changed, 44 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
> index 740eb22550724..b05f04a621e5b 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
> +++ b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
> @@ -600,6 +600,24 @@ &qupv3_id_1 {
>   	status = "okay";
>   };
>   
> +&sdhc_2 {
> +	pinctrl-0 = <&sdc2_default_state &sdc2_card_det_n>;

If card detection is broken and disabled, then likely card detection
GPIO can be omitted, no?

> +	pinctrl-names = "default";
> +
> +	vmmc-supply = <&vreg_l21a_2p95>;
> +	vqmmc-supply = <&vreg_l13a_2p95>;
> +
> +	bus-width = <4>;
> +	/*
> +	 * Card detection is broken, but because the battery must be removed
> +	 * to insert the card, we use this rather than the broken-cd property
> +	 * which would just waste CPU cycles polling.
> +	 */
> +	non-removable;
> +
> +	status = "okay";
> +};
> +
>   &slpi_pas {
>   	firmware-name = "qcom/sdm845/SHIFT/axolotl/slpi.mbn";
>   
> @@ -609,6 +627,32 @@ &slpi_pas {
>   &tlmm {
>   	gpio-reserved-ranges = <0 4>, <81 4>;
>   
> +	sdc2_default_state: sdc2-default-state {
> +		clk-pins {
> +			pins = "sdc2_clk";
> +			drive-strength = <16>;
> +			bias-disable;
> +		};
> +
> +		cmd-pins {
> +			pins = "sdc2_cmd";
> +			drive-strength = <10>;
> +			bias-pull-up;
> +		};
> +
> +		data-pins {
> +			pins = "sdc2_data";
> +			drive-strength = <10>;
> +			bias-pull-up;
> +		};
> +	};
> +
> +	sdc2_card_det_n: sd-card-det-n-state {
> +		pins = "gpio126";
> +		function = "gpio";
> +		bias-disable;
> +	};
> +
>   	sde_dsi_active: sde-dsi-active-state {
>   		pins = "gpio6", "gpio11";
>   		function = "gpio";

--
Best wishes,
Vladimir