[PATCH 1/2] riscv: dts: thead: Enable bluetooth on BeagleV-Ahead

[Thomas Gerner]

On the BeagleV-Ahead the bluetooth module of the Ampak AP6203BM is
identified by the btbcm driver as BCM4362A2. The module is connected by
UART4, several gpio pins and an I2S interface. The I2S is currently not
used as there is no driver. 

Signed-off-by: Thomas Gerner <thomas.gerner at muenchen-mail.de>
---
 .../boot/dts/thead/th1520-beaglev-ahead.dts   | 89 +++++++++++++++++++
 1 file changed, 89 insertions(+)

diff --git a/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts b/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
index e16484a47653..bf64eb667745 100644
--- a/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
+++ b/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
@@ -76,6 +76,23 @@ led-5 {
 		};
 	};
 
+	reg_vbat_1v8: regulator-vbat-1v8 {
+		compatible = "regulator-fixed";
+		regulator-boot-on;
+		regulator-max-microvolt = <1800000>;
+		regulator-min-microvolt = <1800000>;
+		regulator-name = "vbat-1v8";
+	};
+
+	reg_vbat_3v3: regulator-vbat-3v3 {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		regulator-boot-on;
+		regulator-max-microvolt = <3300000>;
+		regulator-min-microvolt = <3300000>;
+		regulator-name = "vbat-3v3";
+	};
+
 	hdmi-connector {
 		compatible = "hdmi-connector";
 		type = "d";
@@ -152,6 +169,31 @@ led-pins {
 };
 
 &padctrl0_apsys {
+	bluetooth_in_pins: bluetooth-0 {
+		in-pins {
+			bias-disable;
+			drive-strength = <1>;
+			function = "gpio";
+			input-enable;
+			input-schmitt-enable;
+			pins = "GPIO2_30";
+			slew-rate = <0>;
+		};
+	};
+
+	bluetooth_out_pins: bluetooth-1 {
+		out-pins {
+			bias-disable;
+			drive-strength = <3>;
+			function = "gpio";
+			input-disable;
+			input-schmitt-disable;
+			pins = "SDIO1_DETN",	/* GPIO2_29 */
+			       "SDIO1_WPRTN";	/* GPIO2_28 */
+			slew-rate = <0>;
+		};
+	};
+
 	gmac0_pins: gmac0-0 {
 		tx-pins {
 			pins = "GMAC0_TX_CLK",
@@ -268,6 +310,30 @@ reg-on-pins {
 	};
 };
 
+&padctrl1_apsys {
+	uart4_pins: uart4-0 {
+		rx-pins {
+			bias-disable;
+			drive-strength = <1>;
+			function = "uart";
+			input-enable;
+			pins = "UART4_RXD", "UART4_CTSN";
+			input-schmitt-enable;
+			slew-rate = <0>;
+		};
+
+		tx-pins {
+			bias-disable;
+			drive-strength = <3>;
+			function = "uart";
+			input-disable;
+			pins = "UART4_TXD", "UART4_RTSN";
+			input-schmitt-disable;
+			slew-rate = <0>;
+		};
+	};
+};
+
 &sdio0 {
 	bus-width = <4>;
 	max-frequency = <198000000>;
@@ -314,3 +380,26 @@ &uart0 {
 	pinctrl-0 = <&uart0_pins>;
 	status = "okay";
 };
+
+&uart4 {
+	pinctrl-0 = <&uart4_pins>;
+	pinctrl-names = "default";
+	uart-has-rtscts;
+
+	status = "okay";
+
+	bluetooth {
+		compatible = "brcm,bcm4329-bt";
+		device-wakeup-gpios = <&gpio2 29 GPIO_ACTIVE_HIGH>;
+		interrupt-parent = <&gpio2>;
+		interrupts = <30 IRQ_TYPE_EDGE_RISING>;
+		interrupt-names = "host-wakeup";
+		max-speed = <921600>;
+		pinctrl-0 = <&bluetooth_in_pins>;
+		pinctrl-1 = <&bluetooth_out_pins>;
+		pinctrl-names = "default";
+		shutdown-gpios = <&gpio2 28 GPIO_ACTIVE_HIGH>; 	/* BT-REG-ON */
+		vbat-supply = <&reg_vbat_3v3>;
+		vddio-supply = <&reg_vbat_1v8>;
+	};
+};
-- 
2.53.0