arm64: dts: rockchip: Add Bluetooth support for Khadas Edge 2L

Enable Bluetooth support for the Ampak AP6275P module on the
Khadas Edge 2L. This involves enabling the UART5 interface for
HCI communication and defining the required regulators and
power-sequence pins.

Signed-off-by: Gray Huang <gray.huang@wesion.com>
Link: https://patch.msgid.link/20260507033541.2576335-3-gray.huang@wesion.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: WesionGray

arch/arm64/boot/dts/rockchip/rk3576-khadas-edge-2l.dts

@@ -552,6 +552,20 @@
 };
 
 &pinctrl {
+	bluetooth {
+		bt_reg_on: bt-reg-on {
+			rockchip,pins = <4 RK_PB2 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+
+		bt_wake_host: bt-wake-host {
+			rockchip,pins = <0 RK_PB1 RK_FUNC_GPIO &pcfg_pull_down>;
+		};
+
+		host_wake_bt: host-wake-bt {
+			rockchip,pins = <0 RK_PA5 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+	};
+
 	pcie0 {
 		pcie0_rst: pcie0-rst {
 			rockchip,pins = <4 RK_PB4 RK_FUNC_GPIO &pcfg_pull_none>;
@@ -598,6 +612,27 @@
 	status = "okay";
 };
 
+&uart5 {
+	pinctrl-0 = <&uart5m1_xfer &uart5m1_ctsn &uart5m1_rtsn>;
+	pinctrl-names = "default";
+	uart-has-rtscts;
+	status = "okay";
+
+	bluetooth {
+		compatible = "brcm,bcm43438-bt";
+		clocks = <&hym8563>;
+		clock-names = "lpo";
+		device-wakeup-gpios = <&gpio0 RK_PA5 GPIO_ACTIVE_HIGH>;
+		interrupt-parent = <&gpio0>;
+		interrupts = <RK_PB1 IRQ_TYPE_LEVEL_HIGH>;
+		pinctrl-0 = <&bt_reg_on &bt_wake_host &host_wake_bt>;
+		pinctrl-names = "default";
+		shutdown-gpios = <&gpio4 RK_PB2 GPIO_ACTIVE_HIGH>;
+		vbat-supply = <&vcc_3v3_s3>;
+		vddio-supply = <&vcc_1v8_s3>;
+	};
+};
+
 &usb_drd1_dwc3 {
 	dr_mode = "host";
 	status = "okay";