[PATCH] arm64: dts: rockchip: Add the buzzer to Kobol Helios64

[Igor Velkov via B4 Relay]

From: Igor Velkov <iav@xxxxxx>

Helios64 has a 2-pin header, P4, for an external buzzer: pin 1 is 5 V,
pin 2 is switched to ground by a MOSFET driven from GPIO4_D3
(BUZZER_ON), active high. Describe it as a gpio-beeper.

Assisted-by: LLM
Signed-off-by: Igor Velkov <iav@xxxxxx>
---
Schematic, sheets 30 and 35:
https://wiki.kobol.io/helios64/files/schematics/Helios64_Schematics_Rev1.2.pdf
P4 in the header list ("Buzzer Alarm Speaker"):
https://wiki.kobol.io/helios64/hardware/

Tested on mainline: GPIO4_D3 follows the beeper input events. Nothing is
plugged into P4 here, so no sound check.
---
 arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
index 63ad79b4c8ac..d84b777b7153 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
@@ -58,6 +58,11 @@ avdd_1v8_s0: regulator-avdd-1v8-s0 {
 		vin-supply = <&vcc3v3_sys_s3>;
 	};
 
+	beeper {
+		compatible = "gpio-beeper";
+		gpios = <&gpio4 RK_PD3 GPIO_ACTIVE_HIGH>;
+	};
+
 	chosen {
 		stdout-path = "serial2:1500000n8";
 	};

---
base-commit: d2abcbb905b0e4b2e06b257fa1e5bcf4faa6dbda
change-id: 20261010-b4-helios64-beeper-a130e2a23508

Best regards,
-- 
Igor Velkov <iav@xxxxxx>