Re: [PATCH v3 1/3] arm64: dts: qcom: sdm845-shift-axolotl: Enable sdcard
From: David Heidelberg
Date: Thu Apr 02 2026 - 07:27:48 EST
On 02/04/2026 13:16, Vladimir Zapolskiy wrote:
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?
Could be, but current use, since it's broken, is to minimize power consumption which we do by setting this GPIO with bias-disable and still documenting it's presence.
David
+ 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";
--
David Heidelberg