linux-kernel - [PATCH 11/14] arm64: dts: qcom: qrb4210-rb2: describe WiFi/BT properly

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Message-Id: <20251231-wcn3990-pwrctl-v1-11-1ff4d6028ad5@oss.qualcomm.com>
Date: Wed, 31 Dec 2025 01:36:01 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bartosz Golaszewski <brgl@...nel.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        Jeff Johnson <jjohnson@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Balakrishna Godavarthi <quic_bgodavar@...cinc.com>,
        Matthias Kaehlcke <mka@...omium.org>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        linux-wireless@...r.kernel.org, ath10k@...ts.infradead.org,
        linux-pm@...r.kernel.org, Krzysztof Kozlowski <krzk@...nel.org>
Subject: [PATCH 11/14] arm64: dts: qcom: qrb4210-rb2: describe WiFi/BT
 properly

The onboard WiFi / BT device, WCN3988, has a simple on-chip PMU, which
further spreads generated voltage. Describe the PMU in the device tree.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 60 +++++++++++++++++++++++++++-----
 1 file changed, 52 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
index 5f8613150bdd..4e1b189dc9d7 100644
--- a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
+++ b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
@@ -237,6 +237,42 @@ vph_pwr: regulator-vph-pwr {
 		regulator-always-on;
 		regulator-boot-on;
 	};
+
+	wcn3988-pmu {
+		compatible = "qcom,wcn3988-pmu";
+
+		pinctrl-0 = <&sw_ctrl_default>;
+		pinctrl-names = "default";
+
+		vddio-supply = <&vreg_l9a_1p8>;
+		vddxo-supply = <&vreg_l16a_1p3>;
+		vddrfa1p3-supply = <&vreg_l17a_1p3>;
+		vddch0-supply = <&vreg_l23a_3p3>;
+
+		swctrl-gpios = <&tlmm 87 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";
+			};
+		};
+	};
 };
 
 &gpi_dma0 {
@@ -684,6 +720,12 @@ lt9611_irq_pin: lt9611-irq-state {
 		bias-disable;
 	};
 
+	sw_ctrl_default: sw-ctrl-default-state {
+		pins = "gpio87";
+		function = "gpio";
+		bias-pull-down;
+	};
+
 	sdc2_card_det_n: sd-card-det-n-state {
 		pins = "gpio88";
 		function = "gpio";
@@ -703,11 +745,10 @@ &uart3 {
 	bluetooth {
 		compatible = "qcom,wcn3988-bt";
 
-		vddio-supply = <&vreg_l9a_1p8>;
-		vddxo-supply = <&vreg_l16a_1p3>;
-		vddrf-supply = <&vreg_l17a_1p3>;
-		vddch0-supply = <&vreg_l23a_3p3>;
-		enable-gpios = <&tlmm 87 GPIO_ACTIVE_HIGH>;
+		vddio-supply = <&vreg_pmu_io>;
+		vddxo-supply = <&vreg_pmu_xo>;
+		vddrf-supply = <&vreg_pmu_rf>;
+		vddch0-supply = <&vreg_pmu_ch0>;
 		max-speed = <3200000>;
 	};
 };
@@ -744,10 +785,13 @@ &usb_qmpphy_out {
 };
 
 &wifi {
+	/* SoC */
 	vdd-0.8-cx-mx-supply = <&vreg_l8a_0p664>;
-	vdd-1.8-xo-supply = <&vreg_l16a_1p3>;
-	vdd-1.3-rfa-supply = <&vreg_l17a_1p3>;
-	vdd-3.3-ch0-supply = <&vreg_l23a_3p3>;
+
+	/* WiFi / BT PMU */
+	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,calibration-variant = "Thundercomm_RB2";
 	firmware-name = "qrb4210";
 

-- 
2.47.3