[PATCH v2] arm64: dts: rockchip: Enable automatic fan control on Rock 5A/5C

[FUKAUMI Naoki]

Link the PWM fan on Radxa ROCK 5A/5C as an active cooling device
managed automatically by the thermal subsystem, with a target SoC
temperature of 65 oC and a minimum-spin interval from 55 oC to 65 oC,
to ensure airflow when the system gets warm.

Signed-off-by: FUKAUMI Naoki <naoki at radxa.com>
---
this patch depends on [1] which depends on [2].

[1] https://patchwork.kernel.org/project/linux-rockchip/cover/20241209132406.4232-1-naoki@radxa.com/
[2] https://patchwork.kernel.org/project/linux-rockchip/cover/20241209125131.4101-1-naoki@radxa.com/
---
Changes in v2
- reword commit message (Dragan Simic)
---
 .../boot/dts/rockchip/rk3588s-rock-5.dtsi     | 32 ++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5.dtsi b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5.dtsi
index 7ae032b3534c..d0b9513d56a7 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5.dtsi
@@ -64,7 +64,7 @@ led-1 {
 		};
 	};
 
-	pwm-fan {
+	fan: pwm-fan {
 		compatible = "pwm-fan";
 		#cooling-cells = <2>;
 		cooling-levels = <0 64 128 192 255>;
@@ -380,6 +380,36 @@ rgmii_phy1: ethernet-phy at 1 {
 	};
 };
 
+&package_thermal {
+	polling-delay = <1000>;
+
+	trips {
+		package_fan0: package-fan0 {
+			hysteresis = <2000>;
+			temperature = <55000>;
+			type = "active";
+		};
+
+		package_fan1: package-fan1 {
+			hysteresis = <2000>;
+			temperature = <65000>;
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map0 {
+			cooling-device = <&fan THERMAL_NO_LIMIT 1>;
+			trip = <&package_fan0>;
+		};
+
+		map1 {
+			cooling-device = <&fan 2 THERMAL_NO_LIMIT>;
+			trip = <&package_fan1>;
+		};
+	};
+};
+
 &pcie2x1l2 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pcie20x1_2_perstn_m0>,
-- 
2.43.0