50 lines
896 B
Bash
Executable file
50 lines
896 B
Bash
Executable file
#!/usr/bin/env bash
|
|
|
|
set -e
|
|
|
|
DEVICE="$1" # eg: /sys/class/drm/card1/device
|
|
HWMON=$(echo "$DEVICE"/hwmon/hwmon*)
|
|
|
|
exit() {
|
|
echo "Setting controll to auto" >&2
|
|
echo 2 > "$HWMON/pwm1_enable"
|
|
}
|
|
|
|
trap exit EXIT INT
|
|
|
|
bail() {
|
|
echo "Error: $@" >&2
|
|
echo "Exiting..." >&2
|
|
exit 1
|
|
}
|
|
|
|
if ! [ -d $HWMON ]; then
|
|
bail "Invalid HWMON"
|
|
fi
|
|
|
|
TEMP_INPUT="$HWMON/temp2_input"
|
|
|
|
if ! [ -f $TEMP_INPUT ]; then
|
|
bail "Invalid TEMP_INPUT"
|
|
fi
|
|
|
|
MIN="$2"
|
|
MAX="$3"
|
|
|
|
echo "Running..." >&2
|
|
while true; do
|
|
TEMPERATURE_RAW=$(cat "$TEMP_INPUT")
|
|
TEMPERATURE="$(( $TEMPERATURE_RAW / 1000 ))"
|
|
# Remap from a number between 60_000..90_000 to 0..255
|
|
PWM=$(( ($TEMPERATURE - $MIN) * 255 / ($MAX - $MIN) ))
|
|
|
|
if [ "$PWM" -gt 255 ]; then
|
|
PWM=255
|
|
elif [ "$PWM" -lt 0 ]; then
|
|
PWM=0
|
|
fi
|
|
|
|
echo 1 > "$HWMON/pwm1_enable"
|
|
echo "$PWM" > "$HWMON/pwm1"
|
|
sleep .1s
|
|
done
|