tast

target/linux/rockchip/armv8/base-files/etc/init.d/rockchip-fan

@@ -0,0 +1,8 @@
+#!/bin/sh /etc/rc.common
+
+START=96
+ 
+start() {
+	echo "fa-pwmfan started"
+	/usr/bin/rockchip-pwm-fan.sh > /dev/null&
+}

target/linux/rockchip/armv8/base-files/usr/bin/rockchip-pwm-fan.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+echo -n 4 > /sys/class/thermal/cooling_device0/cur_state
+sleep 5
+echo -n 0 > /sys/class/thermal/cooling_device0/cur_state
+declare -a CpuTemps=(70000 60000 50000 40000 35000)
+declare -a PwmDutyCycles=(4 3 2 1 0)
+declare -a Percents=(100 70 50 20 0)
+DefaultDuty=0
+DefaultPercents=0
+
+while true
+do
+  temp=$(cat /sys/class/thermal/thermal_zone0/temp)
+	INDEX=0
+	FOUNDTEMP=0
+	DUTY=$DefaultDuty
+	PERCENT=$DefaultPercents
+	
+	for i in 0 1 2 3 4; do
+		if [ $temp -gt ${CpuTemps[$i]} ]; then
+			INDEX=$i
+			FOUNDTEMP=1
+			break
+		fi	
+	done
+	if [ ${FOUNDTEMP} == 1 ]; then
+		DUTY=${PwmDutyCycles[$i]}
+		PERCENT=${Percents[$i]}
+	fi
+
+	if [[ $last_dutu -eq '0' ]]; then
+		if [[ $DUTY -ne '0' ]]; then 
+			echo -n 4 > /sys/class/thermal/cooling_device0/cur_state;
+			sleep 1s;
+			echo -n $DUTY > /sys/class/thermal/cooling_device0/cur_state;
+		else
+			echo -n 0 > /sys/class/thermal/cooling_device0/cur_state;
+		fi
+	else
+		echo -n $DUTY > /sys/class/thermal/cooling_device0/cur_state;
+	fi
+
+	last_dutu=$DUTY
+	echo "temp: $temp, duty: $DUTY, ${PERCENT}%"
+	sleep 10s;
+done