From 0c02a103908b8c55633013deb9c76843db879bd6 Mon Sep 17 00:00:00 2001
From: Hugh Cole-Baker <sigmaris@gmail.com>
Date: Sun, 25 Jan 2026 18:10:14 +0000
Subject: [PATCH] arm64: dts: rockchip: add pwm-fan for NanoPC-T6

FriendlyELEC offers an optional heatsink and fan addon [1] for the
NanoPC-T6 and T6 LTS, which plugs in to the fan connector on the board
driven by pwm1. Add the fan as an active cooling device for the SoC package.
The PWM duty cycle values are taken from the vendor's source [2].

Signed-off-by: Hugh Cole-Baker <sigmaris@gmail.com>

[1]: https://www.friendlyelec.com/index.php?route=product/product&product_id=305
[2]: https://github.com/friendlyarm/kernel-rockchip/blob/4944602540b62f5aad139fe602a76cf7c3176128/arch/arm64/boot/dts/rockchip/rk3588-nanopi6-rev01.dts#L75-L90

Reviewed-by: Dragan Simic <dsimic@manjaro.org>
Link: https://patch.msgid.link/20260125181228.25145-1-sigmaris@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
 .../boot/dts/rockchip/rk3588-nanopc-t6.dtsi   | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
index 90e7fe254491..84b6b53f016a 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
@@ -11,6 +11,7 @@
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/pinctrl/rockchip.h>
 #include <dt-bindings/soc/rockchip,vop2.h>
+#include <dt-bindings/thermal/thermal.h>
 #include <dt-bindings/usb/pd.h>
 #include "rk3588.dtsi"
 
@@ -89,6 +90,14 @@ usr_led: led-1 {
 		};
 	};
 
+	fan: pwm-fan {
+		compatible = "pwm-fan";
+		cooling-levels = <0 35 64 100 150 255>;
+		fan-supply = <&vcc5v0_sys>;
+		pwms = <&pwm1 0 50000 0>;
+		#cooling-cells = <2>;
+	};
+
 	sound {
 		compatible = "simple-audio-card";
 		pinctrl-names = "default";
@@ -590,6 +599,36 @@ &i2s6_8ch {
 	status = "okay";
 };
 
+&package_thermal {
+	polling-delay = <1000>;
+
+	trips {
+		package_warm: package-warm {
+			temperature = <55000>;
+			hysteresis = <2000>;
+			type = "active";
+		};
+
+		package_hot: package-hot {
+			temperature = <65000>;
+			hysteresis = <2000>;
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map0 {
+			trip = <&package_warm>;
+			cooling-device = <&fan THERMAL_NO_LIMIT 1>;
+		};
+
+		map1 {
+			trip = <&package_hot>;
+			cooling-device = <&fan 2 THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
 &pcie2x1l0 {
 	reset-gpios = <&gpio4 RK_PB3 GPIO_ACTIVE_HIGH>;
 	vpcie3v3-supply = <&vcc_3v3_pcie20>;