arm64: dts: rockchip: Enable automatic fan control on Turing RK1

This patch adds thermal trip points and cooling maps to the Turing RK1
in order to enable automatic control of the external PWM fan. The fan is
not active below 45C, as the heatsink alone can generally keep the chip
in this temperature region at idle load. This cooling profile errs on
the side of quietness, since the RK1 is commonly deployed in a Turing
Pi 2 clusterboard alongside three others, with additional cooling
provided at the chassis level.

Helped-by: soxrok2212 <soxrok2212@gmail.com>
Signed-off-by: Sam Edwards <CFSworks@gmail.com>
Link: https://lore.kernel.org/r/20240912025034.180233-4-CFSworks@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-turing-rk1.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-turing-rk1.dtsi
index 9bcb5acdea54da966176dd2726192e6045c66179..f6a12fe12d4598483eaaa518b10d59059ed92616 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3588-turing-rk1.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-turing-rk1.dtsi
@@ -208,6 +208,59 @@
        };
 };
 
+&package_thermal {
+       trips {
+               package_active1: trip-active1 {
+                       temperature = <45000>;
+                       hysteresis = <5000>;
+                       type = "active";
+               };
+               package_active2: trip-active2 {
+                       temperature = <50000>;
+                       hysteresis = <5000>;
+                       type = "active";
+               };
+               package_active3: trip-active3 {
+                       temperature = <60000>;
+                       hysteresis = <5000>;
+                       type = "active";
+               };
+               package_active4: trip-active4 {
+                       temperature = <70000>;
+                       hysteresis = <5000>;
+                       type = "active";
+               };
+               package_active5: trip-active5 {
+                       temperature = <80000>;
+                       hysteresis = <5000>;
+                       type = "active";
+               };
+       };
+
+       cooling-maps {
+               map1 {
+                       trip = <&package_active1>;
+                       cooling-device = <&fan 1 1>;
+               };
+               map2 {
+                       trip = <&package_active2>;
+                       cooling-device = <&fan 2 2>;
+               };
+               map3 {
+                       trip = <&package_active3>;
+                       cooling-device = <&fan 3 3>;
+               };
+               map4 {
+                       trip = <&package_active4>;
+                       cooling-device = <&fan 4 4>;
+               };
+               map5 {
+                       trip = <&package_active5>;
+                       cooling-device = <&fan 5 5>;
+               };
+       };
+};
+
 &pcie2x1l1 {
        linux,pci-domain = <1>;
        pinctrl-names = "default";