add pwm-fan

arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts

@@ -37,6 +37,13 @@
 		};
 	};
 
+	fan0: pwm-fan {
+		compatible = "pwm-fan";
+		#cooling-cells = <2>;
+		pwms = <&pwm 2 10000 0>;
+		cooling-levels = <0 102 170 230>;
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 
@@ -582,6 +589,23 @@
 	status = "okay";
 };
 
+&cpu_thermal {
+	trips {
+		cpu_active: cpu-active {
+			temperature = <70000>;
+			hysteresis = <2000>;
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map1 {
+			trip = <&cpu_active>;
+			cooling-device = <&fan0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins>;

arch/arm64/boot/dts/mediatek/mt7622.dtsi

@@ -143,13 +143,13 @@
 
 			trips {
 				cpu_passive: cpu-passive {
-					temperature = <47000>;
+					temperature = <75000>;
 					hysteresis = <2000>;
 					type = "passive";
 				};
 
 				cpu_active: cpu-active {
-					temperature = <67000>;
+					temperature = <80000>;
 					hysteresis = <2000>;
 					type = "active";
 				};
@@ -428,6 +428,7 @@
 	pwm: pwm@11006000 {
 		compatible = "mediatek,mt7622-pwm";
 		reg = <0 0x11006000 0 0x1000>;
+		#pwm-cells = <3>;
 		interrupts = <GIC_SPI 77 IRQ_TYPE_LEVEL_LOW>;
 		clocks = <&topckgen CLK_TOP_PWM_SEL>,
 			 <&pericfg CLK_PERI_PWM_PD>,

arch/arm64/configs/mt7622_bpi-r64_defconfig

@@ -480,3 +480,4 @@ CONFIG_XFS_FS=m
 
 #CONFIG_BLK_DEV_INITRD=y
 #CONFIG_INITRAMFS_SOURCE="../buildroot/arm64_rootfs.cpio"
+CONFIG_SENSORS_PWM_FAN=m

build.conf

@@ -9,7 +9,7 @@ uploaddir=/var/lib/tftp
 #ramdisksize=4G
 
 board=bpi-r2
-#board=bpi-r64
+board=bpi-r64
 #mainline uboot for r64 (old ATF) needs 64bit uImage
 #uimagearch=arm64