From: David Heidelberg <david@ixit.cz>
Date: Fri, 27 Mar 2026 13:07:08 +0000 (+0100)
Subject: arm64: dts: qcom: sdm845-google: Describe Wi-Fi/BT properly
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0a9c8715663998dc4d8eaa8f1a40440214906d96;p=thirdparty%2Fkernel%2Flinux.git

arm64: dts: qcom: sdm845-google: Describe Wi-Fi/BT properly

The onboard Wi-Fi / BT device, WCN3990, has a simple on-chip PMU, which
further spreads generated voltage. Describe the PMU in the device tree
and rewire Bluetooth and Wi-Fi supply properties to use the PMU LDO
outputs instead of referencing the SoC regulators directly.

Couldn't verify the swctrl GPIO thus omitted.

Assisted-by: Claude:claude-opus-4.6
Signed-off-by: David Heidelberg <david@ixit.cz>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260327-wcn3990-pwrctl-sdm845-v1-1-3f5c34e3fdd0@ixit.cz
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
---

diff --git a/arch/arm64/boot/dts/qcom/sdm845-google-common.dtsi b/arch/arm64/boot/dts/qcom/sdm845-google-common.dtsi
index fd9788d5c3f54..6930066857768 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-google-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845-google-common.dtsi
@@ -131,6 +131,33 @@
 
 		vin-supply = <&vph_pwr>;
 	};
+
+	wcn3990-pmu {
+		compatible = "qcom,wcn3990-pmu";
+
+		vddio-supply = <&vreg_s4a_1p8>;
+		vddxo-supply = <&vreg_l7a_1p8>;
+		vddrf-supply = <&vreg_l17a_1p3>;
+		vddch0-supply = <&vreg_l25a_3p3>;
+
+		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";
+			};
+		};
+	};
 };
 
 &adsp_pas {
@@ -462,10 +489,11 @@
 	bluetooth {
 		compatible = "qcom,wcn3990-bt";
 
-		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>;
 	};
 };
@@ -526,9 +554,9 @@
 
 &wifi {
 	vdd-0.8-cx-mx-supply = <&vreg_l5a_0p8>;
-	vdd-1.8-xo-supply = <&vreg_l7a_1p8>;
-	vdd-1.3-rfa-supply = <&vreg_l17a_1p3>;
-	vdd-3.3-ch0-supply = <&vreg_l25a_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>;
 
 	qcom,snoc-host-cap-8bit-quirk;