FROMLIST: arm64: dts: qcom: Add M.2 QCC2072 support on qcs6490-rb3gen2 industrial mezzanine

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

@@ -175,8 +175,10 @@ dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2-el2.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-industrial-mezzanine-m2-cologne.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

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>;
+	};
+};

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

@@ -527,3 +527,7 @@
 &wifi {
        status = "disabled";
 };
+
+&uart7 {
+       status = "disabled";
+};