arm64: dts: rockchip: Add bluetooth support to ArmSoM Sige7

ArmSoM Sige7 has onboard AP6275P Wi-Fi6 (PCIe) and BT5 (UART) module
which is similar with Khadas Edge2. This commit enables bluetooth
at uart6.

Signed-off-by: Jianfeng Liu <liujianfeng1994@gmail.com>
Link: https://lore.kernel.org/r/20250621135319.61766-1-liujianfeng1994@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: amazingfate

arch/arm64/boot/dts/rockchip/rk3588-armsom-sige7.dts

@@ -373,6 +373,20 @@
 			rockchip,pins = <4 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
+
+	wireless-bluetooth {
+		bt_reset_pin: bt-reset-pin {
+			rockchip,pins = <3 RK_PA6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		bt_wake_pin: bt-wake-pin {
+			rockchip,pins = <3 RK_PD5 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+
+		bt_wake_host_irq: bt-wake-host-irq {
+			rockchip,pins = <0 RK_PC5 RK_FUNC_GPIO &pcfg_pull_down>;
+		};
+	};
 };
 
 &pwm1 {
@@ -767,6 +781,28 @@
 	status = "okay";
 };
 
+&uart6 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart6m1_xfer &uart6m1_ctsn &uart6m1_rtsn>;
+	status = "okay";
+
+	bluetooth {
+		compatible = "brcm,bcm43438-bt";
+		clocks = <&hym8563>;
+		clock-names = "lpo";
+		interrupt-parent = <&gpio0>;
+		interrupts = <RK_PC5 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "host-wakeup";
+		device-wakeup-gpios = <&gpio3 RK_PD5 GPIO_ACTIVE_HIGH>;
+		shutdown-gpios = <&gpio3 RK_PA6 GPIO_ACTIVE_HIGH>;
+		max-speed = <1500000>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&bt_wake_host_irq &bt_wake_pin &bt_reset_pin>;
+		vbat-supply = <&vcc_3v3_s3>;
+		vddio-supply = <&vcc_1v8_s3>;
+	};
+};
+
 &usbdp_phy1 {
 	status = "okay";
 };