#!/bin/sh
MIN_FREQUENCY=$(cat /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_min_freq)
MAX_FREQUENCY=$(cat /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_max_freq)
SCALING_MAX=$(cat /sys/devices/system/cpu/cpufreq/policy0/scaling_max_freq)
SCALING_MIN=$(cat /sys/devices/system/cpu/cpufreq/policy0/scaling_min_freq)
GOVERNOR=$(cat /sys/devices/system/cpu/cpufreq/policy0/scaling_governor)

if [ "$1" = "get" ]; then
  echo "Minimum / Maximum Frequencies: $SCALING_MIN / $SCALING_MAX"
  echo "Governor: $GOVERNOR"
elif [ "$1" = "set" ]; then
  case "$2" in
    "")
      echo "Set what? Nothing was changed, exiting...";;
    "defaults")
      echo "$MIN_FREQUENCY" | sudo tee /sys/devices/system/cpu/cpufreq/policy*/scaling_min_freq
      echo "$MAX_FREQUENCY" | sudo tee /sys/devices/system/cpu/cpufreq/policy*/scaling_max_freq;;
    "minfreq")
      echo "$MIN_FREQUENCY" | sudo tee /sys/devices/system/cpu/cpufreq/policy*/scaling_max_freq
      echo "$MIN_FREQUENCY" | sudo tee /sys/devices/system/cpu/cpufreq/policy*/scaling_min_freq;;
    "maxfreq")
      echo "$MAX_FREQUENCY" | sudo tee /sys/devices/system/cpu/cpufreq/policy*/scaling_min_freq
      echo "$MAX_FREQUENCY" | sudo tee /sys/devices/system/cpu/cpufreq/policy*/scaling_max_freq;;
    "ondemand")
      echo "ondemand" | sudo tee /sys/devices/system/cpu/cpufreq/policy*/scaling_governor;;
    "schedutil")
      echo "schedutil" | sudo tee /sys/devices/system/cpu/cpufreq/policy*/scaling_governor;;
    "performance")
      echo "performance" | sudo tee /sys/devices/system/cpu/cpufreq/policy*/scaling_governor;;
  esac
fi