[PATCH 3/3] arm64: dts: amlogic: t7: khadas-vim4: Enable Bluetooth

[Ronald Claveau]

Enable UART C on the Khadas VIM4 board and attach the BCM43438
 compatible Bluetooth controller to it. The node configures the RTS/CTS
hardware flow control, the associated pinmux, the power supplies (vddao_3v3
and vddao_1v8), the 32 kHz LPO clock shared with the wifi32k fixed
clock, and the GPIO lines used for host wakeup, device wakeup and
shutdown.

Signed-off-by: Ronald Claveau <linux-kernel-dev at aliel.fr>
---
 .../dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts     | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
index 69d6118ba57e7..16f648908090f 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
+++ b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
@@ -253,3 +253,22 @@ &uart_a {
 	clocks = <&xtal>, <&xtal>, <&xtal>;
 	clock-names = "xtal", "pclk", "baud";
 };
+
+&uart_c {
+	status = "okay";
+	pinctrl-0 = <&uart_c_pins>;
+	pinctrl-names = "default";
+	uart-has-rtscts;
+
+	bluetooth {
+		compatible = "brcm,bcm43438-bt";
+		shutdown-gpios = <&gpio GPIOX_17 GPIO_ACTIVE_HIGH>;
+		host-wakeup-gpios = <&gpio GPIOX_18 GPIO_ACTIVE_HIGH>;
+		device-wakeup-gpios = <&gpio GPIOX_19 GPIO_ACTIVE_HIGH>;
+		max-speed = <3000000>;
+		clocks = <&wifi32k>;
+		clock-names = "lpo";
+		vbat-supply = <&vddao_3v3>;
+		vddio-supply = <&vddao_1v8>;
+	};
+};

-- 
2.49.0