WORKAROUND: Add qref and refgen regulator support for QCS8300 and SA8775p PCIe PHYs

Documentation/devicetree/bindings/net/bluetooth/qcom,qcc2072-bt.yaml

@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/bluetooth/qcom,qcc2072-bt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm QCC2072 Bluetooth
+
+maintainers:
+  - Balakrishna Godavarthi <quic_bgodavar@quicinc.com>
+  - Rocky Liao <quic_rjliao@quicinc.com>
+
+description:
+  Qualcomm QCC2072 is a UART-based Bluetooth controller.
+
+properties:
+  compatible:
+    enum:
+      - qcom,qcc2072-bt
+
+required:
+  - compatible
+
+allOf:
+  - $ref: bluetooth-controller.yaml#
+  - $ref: qcom,bluetooth-common.yaml#
+  - $ref: /schemas/serial/serial-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    serial {
+        bluetooth {
+            compatible = "qcom,qcc2072-bt";
+            max-speed = <3200000>;
+        };
+    };

arch/arm64/boot/dts/qcom/Makefile

@@ -179,11 +179,13 @@ dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2.dtb
 
 qcs6490-rb3gen2-vision-mezzanine-dtbs := qcs6490-rb3gen2.dtb qcs6490-rb3gen2-vision-mezzanine.dtbo
 qcs6490-rb3gen2-industrial-mezzanine-dtbs := qcs6490-rb3gen2.dtb qcs6490-rb3gen2-industrial-mezzanine.dtbo
+qcs6490-rb3gen2-industrial-mezzanine-m2-cologne-dtbs := qcs6490-rb3gen2.dtb qcs6490-rb3gen2-industrial-mezzanine.dtbo qcs6490-rb3gen2-industrial-mezzanine-m2-cologne.dtbo
 
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2-industrial-mezzanine.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2-vision-mezzanine.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-thundercomm-minipc-g1iot.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-thundercomm-rubikpi3.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2-industrial-mezzanine-m2-cologne.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs8300-ride.dtb
 
 qcs8300-ride-el2-dtbs := qcs8300-ride.dtb monaco-el2.dtbo

arch/arm64/boot/dts/qcom/glymur-crd.dtsi

@@ -522,14 +522,14 @@
 	pinctrl-0 = <&pcie6_default>;
 	pinctrl-names = "default";
 
-	status = "okay";
+	status = "disabled";
 };
 
 &pcie6_phy {
 	vdda-phy-supply = <&vreg_l1c_e1_0p82>;
 	vdda-pll-supply = <&vreg_l4f_e1_1p08>;
 
-	status = "okay";
+	status = "disabled";
 };
 
 &pcie6_port0 {

arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts

@@ -522,6 +522,23 @@
 		regulator-boot-on;
 	};
 
+	vreg_wcn_bt_en: regulator-wcn-bt-en {
+		compatible = "regulator-fixed";
+
+		regulator-name = "VREG_WCN_BT_EN";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+
+		gpio = <&tlmm 116 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&wcn_bt_en>;
+		pinctrl-names = "default";
+
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
 	vreg_wwan: regulator-wwan {
 		compatible = "regulator-fixed";
 
@@ -687,10 +704,9 @@
 		vddrfa1p2-supply = <&vreg_wcn_1p9>;
 		vddrfa1p8-supply = <&vreg_wcn_1p9>;
 
-		bt-enable-gpios = <&tlmm 116 GPIO_ACTIVE_HIGH>;
 		wlan-enable-gpios = <&tlmm 117 GPIO_ACTIVE_HIGH>;
 
-		pinctrl-0 = <&wcn_bt_en>, <&wcn_wlan_en>;
+		pinctrl-0 = <&wcn_wlan_en>;
 		pinctrl-names = "default";
 
 		regulators {
@@ -1519,13 +1535,13 @@
 		compatible = "qcom,wcn7850-bt";
 		max-speed = <3200000>;
 
-		vddaon-supply = <&vreg_pmu_aon_0p59>;
-		vddwlcx-supply = <&vreg_pmu_wlcx_0p8>;
-		vddwlmx-supply = <&vreg_pmu_wlmx_0p85>;
-		vddrfacmn-supply = <&vreg_pmu_rfa_cmn>;
-		vddrfa0p8-supply = <&vreg_pmu_rfa_0p8>;
-		vddrfa1p2-supply = <&vreg_pmu_rfa_1p2>;
-		vddrfa1p8-supply = <&vreg_pmu_rfa_1p8>;
+		vddrfacmn-supply = <&vreg_wcn_3p3>;
+		vddaon-supply = <&vreg_wcn_3p3>;
+		vddwlcx-supply = <&vreg_wcn_3p3>;
+		vddwlmx-supply = <&vreg_wcn_3p3>;
+		vddrfa0p8-supply = <&vreg_wcn_3p3>;
+		vddrfa1p2-supply = <&vreg_wcn_3p3>;
+		vddrfa1p8-supply = <&vreg_wcn_3p3>;
 	};
 };
 

arch/arm64/boot/dts/qcom/lemans-evk.dts

@@ -721,6 +721,8 @@
 &pcie0_phy {
 	vdda-phy-supply = <&vreg_l5a>;
 	vdda-pll-supply = <&vreg_l1c>;
+	vdda-qref-supply = <&vreg_l4a>;
+	vdda-refgen-supply = <&vreg_l7a>;
 
 	status = "okay";
 };
@@ -738,6 +740,8 @@
 &pcie1_phy {
 	vdda-phy-supply = <&vreg_l5a>;
 	vdda-pll-supply = <&vreg_l1c>;
+	vdda-qref-supply = <&vreg_l4a>;
+	vdda-refgen-supply = <&vreg_l7a>;
 
 	status = "okay";
 };

arch/arm64/boot/dts/qcom/lemans-ride-common.dtsi

@@ -983,13 +983,17 @@
 &pcie0_phy {
 	vdda-phy-supply = <&vreg_l5a>;
 	vdda-pll-supply = <&vreg_l1c>;
+	vdda-qref-supply = <&vreg_l4a>;
+	vdda-refgen-supply = <&vreg_l7a>;
 
 	status = "okay";
 };
 
 &pcie1_phy {
 	vdda-phy-supply = <&vreg_l5a>;
 	vdda-pll-supply = <&vreg_l1c>;
+	vdda-qref-supply = <&vreg_l4a>;
+	vdda-refgen-supply = <&vreg_l7a>;
 
 	status = "okay";
 };

arch/arm64/boot/dts/qcom/lemans.dtsi

@@ -2864,6 +2864,8 @@
 
 			#phy-cells = <0>;
 
+			refgen-supply = <&refgen>;
+
 			status = "disabled";
 		};
 
@@ -3035,6 +3037,8 @@
 
 			#phy-cells = <0>;
 
+			refgen-supply = <&refgen>;
+
 			status = "disabled";
 		};
 

arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts

@@ -475,3 +475,13 @@
 
 	status = "okay";
 };
+
+&pcie0_phy {
+	vdda-qref-supply = <&vreg_l4a>;
+	vdda-refgen-supply = <&vreg_l7a>;
+};
+
+&pcie1_phy {
+	vdda-qref-supply = <&vreg_l4a>;
+	vdda-refgen-supply = <&vreg_l7a>;
+};

arch/arm64/boot/dts/qcom/monaco-evk.dts

@@ -623,6 +623,8 @@
 &pcie0_phy {
 	vdda-phy-supply = <&vreg_l6a>;
 	vdda-pll-supply = <&vreg_l5a>;
+	vdda-qref-supply = <&vreg_l4a>;
+	vdda-refgen-supply = <&vreg_l7a>;
 
 	status = "okay";
 };
@@ -637,6 +639,8 @@
 &pcie1_phy {
 	vdda-phy-supply = <&vreg_l6a>;
 	vdda-pll-supply = <&vreg_l5a>;
+	vdda-qref-supply = <&vreg_l4a>;
+	vdda-refgen-supply = <&vreg_l7a>;
 
 	status = "okay";
 };

arch/arm64/boot/dts/qcom/monaco.dtsi

@@ -2452,6 +2452,8 @@
 
 			#phy-cells = <0>;
 
+			refgen-supply = <&refgen>;
+
 			status = "disabled";
 		};
 
@@ -2643,6 +2645,8 @@
 
 			#phy-cells = <0>;
 
+			refgen-supply = <&refgen>;
+
 			status = "disabled";
 		};
 

arch/arm64/boot/dts/qcom/purwa-iot-evk.dts

@@ -514,6 +514,23 @@
 		regulator-boot-on;
 	};
 
+	vreg_wcn_bt_en: regulator-wcn-bt-en {
+		compatible = "regulator-fixed";
+
+		regulator-name = "VREG_WCN_BT_EN";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+
+		gpio = <&tlmm 116 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&wcn_bt_en>;
+		pinctrl-names = "default";
+
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
 	vreg_wwan: regulator-wwan {
 		compatible = "regulator-fixed";
 
@@ -628,10 +645,9 @@
 		vddrfa1p2-supply = <&vreg_wcn_1p9>;
 		vddrfa1p8-supply = <&vreg_wcn_1p9>;
 
-		bt-enable-gpios = <&tlmm 116 GPIO_ACTIVE_HIGH>;
 		wlan-enable-gpios = <&tlmm 117 GPIO_ACTIVE_HIGH>;
 
-		pinctrl-0 = <&wcn_bt_en>, <&wcn_wlan_en>;
+		pinctrl-0 = <&wcn_wlan_en>;
 		pinctrl-names = "default";
 
 		regulators {
@@ -1504,13 +1520,13 @@
 		compatible = "qcom,wcn7850-bt";
 		max-speed = <3200000>;
 
-		vddaon-supply = <&vreg_pmu_aon_0p59>;
-		vddwlcx-supply = <&vreg_pmu_wlcx_0p8>;
-		vddwlmx-supply = <&vreg_pmu_wlmx_0p85>;
-		vddrfacmn-supply = <&vreg_pmu_rfa_cmn>;
-		vddrfa0p8-supply = <&vreg_pmu_rfa_0p8>;
-		vddrfa1p2-supply = <&vreg_pmu_rfa_1p2>;
-		vddrfa1p8-supply = <&vreg_pmu_rfa_1p8>;
+		vddaon-supply = <&vreg_wcn_3p3>;
+		vddwlcx-supply = <&vreg_wcn_3p3>;
+		vddwlmx-supply = <&vreg_wcn_3p3>;
+		vddrfacmn-supply = <&vreg_wcn_3p3>;
+		vddrfa0p8-supply = <&vreg_wcn_3p3>;
+		vddrfa1p2-supply = <&vreg_wcn_3p3>;
+		vddrfa1p8-supply = <&vreg_wcn_3p3>;
 	};
 };
 

arch/arm64/boot/dts/qcom/qcs6490-rb3gen2-industrial-mezzanine-m2-cologne.dtso

@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2026, Qualcomm Innovation Center, Inc. All rights reserved.
+*/
+
+/dts-v1/;
+/plugin/;
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+&tlmm {
+	qup_uart4_sleep_cts: qup-uart4-sleep-cts-state {
+		pins = "gpio16";
+		function = "gpio";
+		/*
+		 * Configure a bias-bus-hold on CTS to lower power
+		 * usage when Bluetooth is turned off. Bus hold will
+		 * maintain a low power state regardless of whether
+		 * the Bluetooth module drives the pin in either
+		 * direction or leaves the pin fully unpowered.
+		 */
+		bias-bus-hold;
+	};
+
+	qup_uart4_sleep_rts: qup-uart4-sleep-rts-state {
+		pins = "gpio17";
+		function = "gpio";
+		/*
+		 * Configure pull-down on RTS. As RTS is active low
+		 * signal, pull it low to indicate the BT SoC that it
+		 * can wakeup the system anytime from suspend state by
+		 * pulling RX low (by sending wakeup bytes).
+		 */
+		bias-pull-down;
+	};
+
+	qup_uart4_sleep_rx: qup-uart4-sleep-rx-state {
+		pins = "gpio19";
+		function = "gpio";
+		/*
+		 * Configure a pull-up on RX. This is needed to avoid
+		 * garbage data when the TX pin of the Bluetooth module
+		 * is floating which may cause spurious wakeups.
+		 */
+		bias-pull-up;
+	};
+
+	qup_uart4_sleep_tx: qup-uart4-sleep-tx-state {
+		pins = "gpio18";
+		function = "gpio";
+		/*
+		 * Configure pull-up on TX when it isn't actively driven
+		 * to prevent BT SoC from receiving garbage during sleep.
+		 */
+		bias-pull-up;
+	};
+
+	sw_ctrl: sw-ctrl-state {
+		pins = "gpio86";
+		function = "gpio";
+		bias-pull-down;
+	};
+};
+
+&qup_uart4_cts {
+	/*
+	 * Configure a bias-bus-hold on CTS to lower power
+	 * usage when Bluetooth is turned off. Bus hold will
+	 * maintain a low power state regardless of whether
+	 * the Bluetooth module drives the pin in either
+	 * direction or leaves the pin fully unpowered.
+	 */
+	bias-bus-hold;
+};
+
+&qup_uart4_rts {
+	/* We'll drive RTS, so no pull */
+	drive-strength = <2>;
+	bias-disable;
+};
+
+&qup_uart4_rx {
+	/*
+	 * Configure a pull-up on RX. This is needed to avoid
+	 * garbage data when the TX pin of the Bluetooth module is
+	 * in tri-state (module powered off or not driving the
+	 * signal yet).
+	 */
+	bias-pull-up;
+};
+
+&qup_uart4_tx {
+	/* We'll drive TX, so no pull */
+	drive-strength = <2>;
+	bias-disable;
+};
+
+&uart4 {
+	status = "okay";
+	/delete-property/ interrupts;
+	interrupts-extended = <&intc GIC_SPI 605 IRQ_TYPE_LEVEL_HIGH>,
+				<&tlmm 19 IRQ_TYPE_EDGE_FALLING>;
+	pinctrl-names = "default", "sleep";
+	pinctrl-1 = <&qup_uart4_sleep_cts>, <&qup_uart4_sleep_rts>,
+			<&qup_uart4_sleep_tx>, <&qup_uart4_sleep_rx>;
+
+	bluetooth: bluetooth {
+		compatible = "qcom,qcc2072-bt";
+		max-speed = <3200000>;
+	};
+};