arm64: dts: qcom: sdm845-shift-axolotl: Enable sdcard

The SHIFT6mq features an sdcard slot, add it.

Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Co-developed-by: David Heidelberg <david@ixit.cz>
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://lore.kernel.org/r/20260402-axolotl-misc-p1-v3-1-8934e9db6831@ixit.cz
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Author: kcxt

arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts

@@ -600,6 +600,24 @@
 	status = "okay";
 };
 
+&sdhc_2 {
+	pinctrl-0 = <&sdc2_default_state &sdc2_card_det_n>;
+	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 @@
 &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";