fan control script for AMD GPU in linux

fanctl.py

#!/bin/env python3
import time
import os
import math

os.chdir('/sys/class/drm/card0/device/hwmon/hwmon2/')

temp = 'temp1'
fan = 'fan1'

def read(path):
    with open(path) as f:
        return int(f.read())

def write(path, n):
    with open(path, 'w') as f:
        f.write(str(n))

fan_min = read(fan+"_min")
fan_max = read(fan+"_max")
print(fan_min, fan_max)

write(fan+"_enable", 1)

while True:
    t = read(temp+"_input")/1000

    temp_min = 40
    temp_max = 80
    if t < temp_min:
        f = fan_min
    elif t > temp_max:
        f = fan_max
    else:
        p = math.floor((t-temp_min)/(temp_max - temp_min)*(fan_max - fan_min) + fan_min)
    print(t, p)    
    write(fan+'_target', p)
    time.sleep(1)

fanctl.service

[Unit]
Description=AMD GPU fan control

[Service]
Type=simple
ExecStart=/home/riaqn/projects/amdgpu-fan/fanctl.py

[Install]
WantedBy=multi-user.target