linux-kernel - [PATCH 2/2] arm64: dts: rockchip: Enable automatic fan control on Radxa Rock 5C

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Message-Id: <20250120-rock-5c-fan-v1-2-5fb8446c981b@gmail.com>
Date: Mon, 20 Jan 2025 23:22:47 +0400
From: Alexey Charkov <alchark@...il.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Alexey Charkov <alchark@...il.com>
Subject: [PATCH 2/2] arm64: dts: rockchip: Enable automatic fan control on
 Radxa Rock 5C

Add the necessary cooling map to enable the kernel's thermal subsystem
to manage the fan speed automatically depending on the overall SoC
package temperature on Radxa Rock 5C

Signed-off-by: Alexey Charkov <alchark@...il.com>
---
 arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts | 32 +++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts
index 1b66a69cf0f8795d7305852fa7fef3d0672ada7f..6e56d7704cbe0dc06242cb39df56b2fc9d6bc774 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts
@@ -68,7 +68,7 @@ led-1 {
 		};
 	};
 
-	fan {
+	fan: fan {
 		compatible = "pwm-fan";
 		#cooling-cells = <2>;
 		cooling-levels = <0 24 44 64 128 192 255>;
@@ -417,6 +417,36 @@ rgmii_phy1: ethernet-phy@1 {
 	};
 };
 
+&package_thermal {
+	polling-delay = <1000>;
+
+	trips {
+		package_fan0: package-fan0 {
+			temperature = <55000>;
+			hysteresis = <2000>;
+			type = "active";
+		};
+
+		package_fan1: package-fan1 {
+			temperature = <65000>;
+			hysteresis = <2000>;
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map0 {
+			trip = <&package_fan0>;
+			cooling-device = <&fan THERMAL_NO_LIMIT 1>;
+		};
+
+		map1 {
+			trip = <&package_fan1>;
+			cooling-device = <&fan 2 THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
 &pcie2x1l2 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pcie20x1_2_perstn_m0>;

-- 
2.48.1