[PATCH] arm64: dts: qcom: sdm845-shift-axolotl: describe WiFi/BT properly

[PATCH] arm64: dts: qcom: sdm845-shift-axolotl: describe WiFi/BT properly

[David Heidelberg via B4 Relay]

From: David Heidelberg <david@ixit.cz>

The onboard WiFi / BT device, WCN3990, has a simple on-chip PMU, which
further spreads generated voltage. Describe the PMU in the device tree.

Signed-off-by: David Heidelberg <david@ixit.cz>
---
 arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 65 +++++++++++++++++++----
 1 file changed, 55 insertions(+), 10 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
index 7d81198bc499c..c14a798035d1b 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
@@ -105,6 +105,43 @@ vreg_s4a_1p8: pm8998-smps4 {
 
 		vin-supply = <&vph_pwr>;
 	};
+
+	wcn3990-pmu {
+		compatible = "qcom,wcn3990-pmu";
+
+		pinctrl-0 = <&sw_ctrl_default>;
+		pinctrl-names = "default";
+
+		vddio-supply = <&vreg_s4a_1p8>;
+		vddxo-supply = <&vreg_l7a_1p8>;
+		vddrf-supply = <&vreg_l17a_1p3>;
+		vddch0-supply = <&vreg_l25a_3p3>;
+		vddch1-supply = <&vreg_l23a_3p3>;
+
+		swctrl-gpios = <&pm8998_gpios 3 GPIO_ACTIVE_HIGH>;
+
+		regulators {
+			vreg_pmu_io: ldo0 {
+				regulator-name = "vreg_pmu_io";
+			};
+
+			vreg_pmu_xo: ldo1 {
+				regulator-name = "vreg_pmu_xo";
+			};
+
+			vreg_pmu_rf: ldo2 {
+				regulator-name = "vreg_pmu_rf";
+			};
+
+			vreg_pmu_ch0: ldo3 {
+				regulator-name = "vreg_pmu_ch0";
+			};
+
+			vreg_pmu_ch1: ldo4 {
+				regulator-name = "vreg_pmu_ch1";
+			};
+		};
+	};
 };
 
 &adsp_pas {
@@ -526,6 +563,13 @@ &mss_pil {
 };
 
 &pm8998_gpios {
+	sw_ctrl_default: sw-ctrl-default-state {
+		pins = "gpio3";
+		function = "normal";
+		input-enable;
+		bias-pull-down;
+	};
+
 	volume_up_gpio: pm8998-gpio6-state {
 		pinconf {
 			pins = "gpio6";
@@ -732,10 +776,11 @@ bluetooth {
 		 */
 		firmware-name = "SHIFT/axolotl/crnv21.bin";
 
-		vddio-supply = <&vreg_s4a_1p8>;
-		vddxo-supply = <&vreg_l7a_1p8>;
-		vddrf-supply = <&vreg_l17a_1p3>;
-		vddch0-supply = <&vreg_l25a_3p3>;
+		vddio-supply = <&vreg_pmu_io>;
+		vddxo-supply = <&vreg_pmu_xo>;
+		vddrf-supply = <&vreg_pmu_rf>;
+		vddch0-supply = <&vreg_pmu_ch0>;
+
 		max-speed = <3200000>;
 	};
 };
@@ -790,14 +835,14 @@ &venus {
 };
 
 &wifi {
-	status = "okay";
-
 	vdd-0.8-cx-mx-supply = <&vreg_l5a_0p8>;
-	vdd-1.3-rfa-supply = <&vreg_l17a_1p3>;
-	vdd-1.8-xo-supply = <&vreg_l7a_1p8>;
-	vdd-3.3-ch0-supply = <&vreg_l25a_3p3>;
-	vdd-3.3-ch1-supply = <&vreg_l23a_3p3>;
+	vdd-1.8-xo-supply = <&vreg_pmu_xo>;
+	vdd-1.3-rfa-supply = <&vreg_pmu_rf>;
+	vdd-3.3-ch0-supply = <&vreg_pmu_ch0>;
+	vdd-3.3-ch1-supply = <&vreg_pmu_ch1>;
 
 	qcom,calibration-variant = "shift_axolotl";
 	qcom,snoc-host-cap-8bit-quirk;
+
+	status = "okay";
 };

---
base-commit: e6efabc0afca02efa263aba533f35d90117ab283
change-id: 20260415-axolotl-wifi-9280ef88618a

Best regards,
-- 
David Heidelberg <david@ixit.cz>

Re: [PATCH] arm64: dts: qcom: sdm845-shift-axolotl: describe WiFi/BT properly

[Konrad Dybcio]

On 4/15/26 1:56 PM, David Heidelberg via B4 Relay wrote:
> From: David Heidelberg <david@ixit.cz>
> 
> The onboard WiFi / BT device, WCN3990, has a simple on-chip PMU, which
> further spreads generated voltage. Describe the PMU in the device tree.
> 
> Signed-off-by: David Heidelberg <david@ixit.cz>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: [PATCH] arm64: dts: qcom: sdm845-shift-axolotl: describe WiFi/BT properly

[Dmitry Baryshkov]

On Wed, Apr 15, 2026 at 01:56:08PM +0200, David Heidelberg via B4 Relay wrote:
> From: David Heidelberg <david@ixit.cz>
> 
> The onboard WiFi / BT device, WCN3990, has a simple on-chip PMU, which
> further spreads generated voltage. Describe the PMU in the device tree.
> 
> Signed-off-by: David Heidelberg <david@ixit.cz>
> ---
>  arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 65 +++++++++++++++++++----
>  1 file changed, 55 insertions(+), 10 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>


-- 
With best wishes
Dmitry