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

From: David Heidelberg via B4 Relay

Date: Fri Mar 20 2026 - 12:45:31 EST


From: Casey Connolly <casey.connolly@xxxxxxxxxx>

The SHIFT6mq features an sdcard slot, add it.

Signed-off-by: Casey Connolly <casey.connolly@xxxxxxxxxx>
Signed-off-by: David Heidelberg <david@xxxxxxx>
---
arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 43 +++++++++++++++++++++++
1 file changed, 43 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
index 51b041f91d3e2..1f21da310b762 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
@@ -600,6 +600,23 @@ &qupv3_id_1 {
status = "okay";
};

+&sdhc_2 {
+ status = "okay";
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&sdc2_default_state &sdc2_card_det_n>;
+
+ 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;
+};
+
&slpi_pas {
firmware-name = "qcom/sdm845/SHIFT/axolotl/slpi.mbn";

@@ -609,6 +626,32 @@ &slpi_pas {
&tlmm {
gpio-reserved-ranges = <0 4>, <81 4>;

+ sdc2_default_state: sdc2-default-state {
+ clk-pins {
+ pins = "sdc2_clk";
+ bias-disable;
+ drive-strength = <16>;
+ };
+
+ cmd-pins {
+ pins = "sdc2_cmd";
+ bias-pull-up;
+ drive-strength = <10>;
+ };
+
+ data-pins {
+ pins = "sdc2_data";
+ bias-pull-up;
+ drive-strength = <10>;
+ };
+ };
+
+ sdc2_card_det_n: sd-card-det-n-state {
+ pins = "gpio126";
+ function = "gpio";
+ bias-pull-up;
+ };
+
sde_dsi_active: sde-dsi-active-state {
pins = "gpio6", "gpio11";
function = "gpio";

--
2.53.0