#! /bin/sh

PATH=/sbin:/bin:/usr/sbin:/usr/bin
NAME=cpufreq_setup

DEFAULT_GOV="performance"
OPTIMAL_GOV="ondemand"
IGNORE_NICE=0

SYSFS_ROOT="/sys/devices/system/cpu/cpu0/cpufreq"
SYSFS_GOV="$SYSFS_ROOT/scaling_governor"
SYSFS_AVAIL_GOV="$SYSFS_ROOT/scaling_available_governors"

function setgovernor()
{
	GOV=$1
	SYSFS_IGNORENICE="$SYSFS_ROOT/$GOV/ignore_nice"
	echo -n "Setting cpufreq governor to: "
	if [ -f $SYSFS_GOV ]; then
		grep -q $GOV $SYSFS_AVAIL_GOV 
		if [ $? -eq 0 ]; then
			echo $GOV
			echo $GOV > $SYSFS_GOV
			if [ -f $SYSFS_IGNORENICE ]; then
				echo $IGNORE_NICE > $SYSFS_IGNORENICE
			fi
		else
			echo "governor $GOV is not available!"
		fi	
        else
                echo "required sysfs objects not found!"
        fi
}

case "$1" in
  start)
	setgovernor $OPTIMAL_GOV
	;;
  stop)
	setgovernor $DEFAULT_GOV
	;;
  *)
	N=/etc/init.d/$NAME
	echo "Usage: $N {start|stop}" >&2
	exit 1
	;;
esac

exit 0