#!/bin/bash

RETVAL=0

start() {
	touch /var/lock/subsys/cpufreq
	test -f /etc/sysconfig/cpufreq && . /etc/sysconfig/cpufreq
	for cpu in /sys/devices/system/cpu/* ; do
		[ "x$GOVERNOR" != "x" ] && [ -f  $cpu/cpufreq/scaling_governor ] && echo $GOVERNOR > $cpu/cpufreq/scaling_governor
		[ "x$MAX_FREQ" != "x" ] && [ -f  $cpu/cpufreq/scaling_max_freq ] && echo $MAX_FREQ > $cpu/cpufreq/scaling_max_freq
		[ "x$MIN_FREQ" != "x" ] && [ -f  $cpu/cpufreq/scaling_min_freq ] && echo $MIN_FREQ > $cpu/cpufreq/scaling_min_freq
	done
}

stop() {
	# make sure no governor module is in use first
	# by switching to userspace governor (because it's built-in and won't modify frequency)
	for cpu in /sys/devices/system/cpu/* ; do
	    [ -f  $cpu/cpufreq/scaling_governor ] && echo userspace > $cpu/cpufreq/scaling_governor
	done
	rm -f /var/lock/subsys/cpufreq
}

reload() {
	stop
	start
}

case "$1" in
	start)
		start
		;;
	stop)
		stop
		;;
	reload)
		reload
		;;
	*)
		echo "Usage: %s {start|stop|reload}" `basename $0`
		RETVAL=1
		;;
esac

exit $RETVAL