linux-kernel - [PATCH 3/4] arm64: dts: rockchip: enable temperature driven fan control on Rock 5B

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Date: Thu, 25 Jan 2024 00:30:06 +0400
From: Alexey Charkov <alchark@...il.com>
To: Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: Daniel Lezcano <daniel.lezcano@...aro.org>, 
 Dragan Simic <dsimic@...jaro.org>, 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 3/4] arm64: dts: rockchip: enable temperature driven fan
 control on Rock 5B

This enables thermal monitoring on Radxa Rock 5B and links the PWM
fan as an active cooling device managed automatically by the thermal
subsystem, with a target SoC temperature of 55C

Signed-off-by: Alexey Charkov <alchark@...il.com>
---
 arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
index 9b7bf6cec8bd..c4c94e0b6163 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
@@ -52,7 +52,7 @@ led_rgb_b {
 
 	fan: pwm-fan {
 		compatible = "pwm-fan";
-		cooling-levels = <0 95 145 195 255>;
+		cooling-levels = <0 120 150 180 210 240 255>;
 		fan-supply = <&vcc5v0_sys>;
 		pwms = <&pwm1 0 50000 0>;
 		#cooling-cells = <2>;
@@ -180,6 +180,25 @@ &cpu_l3 {
 	cpu-supply = <&vdd_cpu_lit_s0>;
 };
 
+&package_thermal {
+	polling-delay = <1000>;
+
+	trips {
+		package_fan: package-fan {
+			temperature = <55000>;
+			hysteresis = <2000>;
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map-fan {
+			trip = <&package_fan>;
+			cooling-device = <&fan THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
 &i2c0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&i2c0m2_xfer>;
@@ -738,6 +757,10 @@ regulator-state-mem {
 	};
 };
 
+&tsadc {
+	status = "okay";
+};
+
 &uart2 {
 	pinctrl-0 = <&uart2m0_xfer>;
 	status = "okay";

-- 
2.43.0