linux-kernel - [PATCH 4/4] arm64: dts: rockchip: enable bluetooth on ArmSoM Sige5

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Message-Id: <20250603-sige5-updates-v1-4-717e8ce4ab77@gmail.com>
Date: Tue, 03 Jun 2025 21:01:16 +0400
From: Alexey Charkov <alchark@...il.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Alexey Charkov <alchark@...il.com>
Subject: [PATCH 4/4] arm64: dts: rockchip: enable bluetooth on ArmSoM Sige5

ArmSoM Sige5 uses a soldered-on UART connected Bluetooth controller.
Namely, board v1.1 uses a Realtek based BL-M8852BS2, while v1.2 uses a
Broadcom based BW3752-50B1.

Add required device tree nodes to enable the Broadcom based module.

Signed-off-by: Alexey Charkov <alchark@...il.com>
---
 .../boot/dts/rockchip/rk3576-armsom-sige5.dts      | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-armsom-sige5.dts b/arch/arm64/boot/dts/rockchip/rk3576-armsom-sige5.dts
index dcd033859398312f7693bebb7f080ee4f2ecaa32..46e5d6e30898a0f937283e986f188947e10250ec 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-armsom-sige5.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-armsom-sige5.dts
@@ -791,6 +791,20 @@ usb_host_pwren: usb-host-pwren {
 		};
 	};
 
+	wireless-bluetooth {
+		bt_reg_on: bt-reg-on {
+			rockchip,pins = <1 RK_PC7 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+
+		host_wake_bt: host-wake-bt {
+			rockchip,pins = <1 RK_PD4 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+
+		bt_wake_host: bt-wake-host {
+			rockchip,pins = <0 RK_PB1 RK_FUNC_GPIO &pcfg_pull_down>;
+		};
+	};
+
 	wireless-wlan {
 		wifi_wake_host: wifi-wake-host {
 			rockchip,pins = <0 RK_PB0 RK_FUNC_GPIO &pcfg_pull_down>;
@@ -872,6 +886,25 @@ &uart0 {
 	status = "okay";
 };
 
+&uart4 {
+	pinctrl-0 = <&uart4m1_xfer &uart4m1_ctsn &uart4m1_rtsn>;
+	pinctrl-names = "default";
+	uart-has-rtscts;
+	status = "okay";
+
+	bluetooth {
+		compatible = "brcm,bcm43438-bt";
+		clocks = <&hym8563>;
+		clock-names = "lpo";
+		device-wakeup-gpios = <&gpio1 RK_PD7 GPIO_ACTIVE_HIGH>;
+		interrupt-parent = <&gpio0>;
+		interrupts = <RK_PB1 IRQ_TYPE_EDGE_FALLING>;
+		pinctrl-0 = <&bt_reg_on>, <&bt_wake_host>, <&host_wake_bt>;
+		pinctrl-names = "default";
+		shutdown-gpios = <&gpio0 RK_PC6 GPIO_ACTIVE_HIGH>;
+	};
+};
+
 &usb_drd1_dwc3 {
 	dr_mode = "host";
 	status = "okay";

-- 
2.49.0