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 fd9788d5c3f54f550e410211ba54663bbb63e48f..6930066857768205bfce894698c0697eeaf3f77a 100644 (file)
--- 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;