arm64: dts: rockchip: Add Bluetooth on rk3576-evb1-v10

Add device tree nodes to enable Bluetooth in the Ampak AP6275P module
found on Rockchip RK3576 EVB1 and connected over a UART link.

Note that this doesn't enable the out-of-band PCM connection. It's
routed to SAI2 M0 pins in case anyone wishes to add it.

Tested-by: Pavel Zhovner <pavel@flipperdevices.com>
Signed-off-by: Alexey Charkov <alchark@gmail.com>
Link: https://lore.kernel.org/r/20250813-evb1-rtcwifibt-v1-3-d13c83422971@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts b/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
index 1adbbcc1c569a124b19d4e6a3419743eb7b5c7d8..439831715cbb55a67ce9ca8736d70549377e8048 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
@@ -766,6 +766,20 @@
 };
 
 &pinctrl {
+       bluetooth {
+               bt_reg_on: bt-reg-on {
+                       rockchip,pins = <1 RK_PC7 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 = <1 RK_PD4 RK_FUNC_GPIO &pcfg_pull_up>;
+               };
+       };
+
        hym8563 {
                rtc_int: rtc-int {
                        rockchip,pins = <0 RK_PA0 RK_FUNC_GPIO &pcfg_pull_up>;
@@ -855,6 +869,27 @@
        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_PD4 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 = <&gpio1 RK_PC7 GPIO_ACTIVE_HIGH>;
+               vbat-supply = <&vcc_3v3_s3>;
+               vddio-supply = <&vcc_1v8_s3>;
+       };
+};
+
 &ufshc {
        status = "okay";
 };