add fancontrol

machines/storage/s0/fancontrol.rs

@@ -0,0 +1,47 @@
+use std::cmp::{max, min};
+use std::path::PathBuf;
+use std::fs::{read_dir, read_to_string, write};
+use std::thread::sleep;
+use std::time::Duration;
+
+const MINTEMP : i32 = 50000;
+const MAXTEMP : i32 = 80000;
+const MINSTART : i32 = 60;
+const MINSTOP : i32 = 29;
+const MAXPWM : i32 = 255;
+
+
+fn adjust(fan: &PathBuf, sensor: &PathBuf) {
+    let temp: i32 = read_to_string(sensor).unwrap().trim().parse().unwrap();
+    let prev_pwm: i32 = read_to_string(fan).unwrap().trim().parse().unwrap();
+
+    let mut pwm: i32;
+    pwm = (temp - MINTEMP) * 255 / (MAXTEMP - MINTEMP);
+    pwm = max(pwm, 0);
+    if pwm > 0 {
+        pwm = max(pwm, if prev_pwm < MINSTOP { MINSTART } else { MINSTOP });
+        pwm = min(pwm, MAXPWM);
+    }
+    //println!("sensor: {}, pwm: {}", temp, pwm);
+    write(fan, pwm.to_string()).unwrap();
+}
+
+fn main() {
+    let mut fans = Vec::new();
+    for hwmon_dir in ["/sys/devices/platform/p6-fan/hwmon", "/sys/devices/platform/p7-fan/hwmon"].iter() {
+        for dir in read_dir(hwmon_dir).unwrap() {
+            let mut p = dir.unwrap().path();
+            p.push("pwm1");
+            if p.exists() {
+                fans.push(p)
+            }
+        }
+    }
+    let fans = fans;
+    loop {
+        for fan in &fans {
+            adjust(fan, &PathBuf::from("/sys/devices/virtual/thermal/thermal_zone0/hwmon0/temp1_input"))
+        }
+        sleep(Duration::from_secs(5));
+    }
+}