linux-kernel - [PATCH v2 5/5] arm64: dts: rockchip: add Khadas MCU and fan control nodes

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Message-ID: <1e4a191ff94098a5b086a83d14b37944351242ab.1753179491.git.efectn@protonmail.com>
Date: Tue, 22 Jul 2025 15:38:15 +0300
From: muhammed.efecetin.67@...il.com
To: linux-rockchip@...ts.infradead.org
Cc: devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	heiko@...ech.de,
	neil.armstrong@...aro.org,
	lee@...nel.org,
	rafael@...nel.org,
	efectn@...tonmail.com,
	daniel.lezcano@...aro.org
Subject: [PATCH v2 5/5] arm64: dts: rockchip: add Khadas MCU and fan control nodes

From: Muhammed Efe Cetin <efectn@...tonmail.com>

Add Khadas MCU fan control to Khadas Edge 2 with 4 fan control levels.

Signed-off-by: Muhammed Efe Cetin <efectn@...tonmail.com>
---
 .../dts/rockchip/rk3588s-khadas-edge2.dts     | 58 +++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts b/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts
index 2c22abaf4..b51b64732 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts
@@ -271,12 +271,70 @@ hym8563: rtc@51 {
 		clock-output-names = "hym8563";
 		wakeup-source;
 	};
+
+	khadas_mcu: system-controller@18 {
+		compatible = "khadas,mcu-v2";
+		reg = <0x18>;
+		#cooling-cells = <2>;
+	};
 };
 
 &i2s5_8ch {
 	status = "okay";
 };
 
+&package_thermal {
+	polling-delay = <2000>;
+
+	trips {
+		package_fan0: package-fan0 {
+			temperature = <50000>;
+			hysteresis = <5000>;
+			type = "active";
+		};
+
+		package_fan1: package-fan1 {
+			temperature = <60000>;
+			hysteresis = <5000>;
+			type = "active";
+		};
+
+		package_fan2: package-fan2 {
+			temperature = <65000>;
+			hysteresis = <5000>;
+			type = "active";
+		};
+
+		package_fan3: package-fan3 {
+			temperature = <75000>;
+			hysteresis = <5000>;
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map0 {
+			trip = <&package_fan0>;
+			cooling-device = <&khadas_mcu THERMAL_NO_LIMIT 50>;
+		};
+
+		map1 {
+			trip = <&package_fan1>;
+			cooling-device = <&khadas_mcu 50 72>;
+		};
+
+		map2 {
+			trip = <&package_fan2>;
+			cooling-device = <&khadas_mcu 72 100>;
+		};
+
+		map3 {
+			trip = <&package_fan3>;
+			cooling-device = <&khadas_mcu 100 THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
 &pd_gpu {
 	domain-supply = <&vdd_gpu_s0>;
 };
-- 
2.50.1