linux-kernel - [PATCH v2 2/4] arm64: dts: rockchip: enable temperature driven fan control on Rock 5B

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Date: Tue, 30 Jan 2024 22:21:14 +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>, Viresh Kumar <viresh.kumar@...aro.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 v2 2/4] 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 65C and a minimum-spin
interval from 55C to 65C to ensure airflow when the system gets warm

Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: Alexey Charkov <alchark@...il.com>
---
 arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts | 34 ++++++++++++++++++++++++-
 1 file changed, 33 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 a0e303c3a1dc..b485edeef876 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>;
@@ -173,6 +173,34 @@ &cpu_l3 {
 	cpu-supply = <&vdd_cpu_lit_s0>;
 };
 
+&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 1 THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
 &i2c0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&i2c0m2_xfer>;
@@ -731,6 +759,10 @@ regulator-state-mem {
 	};
 };
 
+&tsadc {
+	status = "okay";
+};
+
 &uart2 {
 	pinctrl-0 = <&uart2m0_xfer>;
 	status = "okay";

-- 
2.43.0