arm64: dts: mt7986: add pwm-fan and cooling-maps to BPI-R3 dts

Add pwm-fan and cooling-maps to BananaPi-R3 devicetree.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230530201235.22330-5-linux@fw-web.deSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts

@@ -38,6 +38,15 @@ dcin: regulator-12vd {
 		regulator-always-on;
 	};
 
+	fan: pwm-fan {
+		compatible = "pwm-fan";
+		#cooling-cells = <2>;
+		/* cooling level (0, 1, 2) - pwm inverted */
+		cooling-levels = <255 96 0>;
+		pwms = <&pwm 0 10000 0>;
+		status = "okay";
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 
@@ -133,6 +142,28 @@ sfp2: sfp-2 {
 	};
 };
 
+&cpu_thermal {
+	cooling-maps {
+		cpu-active-high {
+			/* active: set fan to cooling level 2 */
+			cooling-device = <&fan 2 2>;
+			trip = <&cpu_trip_active_high>;
+		};
+
+		cpu-active-low {
+			/* active: set fan to cooling level 1 */
+			cooling-device = <&fan 1 1>;
+			trip = <&cpu_trip_active_low>;
+		};
+
+		cpu-passive {
+			/* passive: set fan to cooling level 0 */
+			cooling-device = <&fan 0 0>;
+			trip = <&cpu_trip_passive>;
+		};
+	};
+};
+
 &crypto {
 	status = "okay";
 };