#!/sbin/runscript
# Copyright 2005-02-24 Carl Meyer <carl@meyerloewen.net>
# Distributed under the terms of the GNU General Public License v2

CPUFREQ_DIR=/sys/devices/system/cpu/cpu0/cpufreq

load_modules() {
	for MODULE in ${CPUFREQ_MODULES}
	do
		if [ -z `cut -d' ' -f1 /proc/modules | egrep "^${MODULE}\$"` ] &&
		   [ -z `cut -d' ' -f1 /proc/modules | egrep "^${MODULE//-/_}\$"` ]; then
			ebegin "   Loading: ${MODULE}"
			/sbin/modprobe ${MODULE}
			eend $?
		fi
	done
	if [ ! -d "${CPUFREQ_DIR}" ]; then
		eerror "ERROR: failed to load necessary modules"
	fi
}

start() {
	if [ -f /proc/modules ]; then
		ebegin "Loading cpufreq modules"
		if load_modules; then
			eend 0
		else
			eend 1
			return 1
		fi
	fi
	ebegin "Switching to ${CPUFREQ_BATT_GOV} CPU frequency governor..."
	if [ -w "${CPUFREQ_DIR}/scaling_governor" ] && [ -n "`grep ${CPUFREQ_BATT_GOV} ${CPUFREQ_DIR}/scaling_available_governors`" ]; then 
		echo "${CPUFREQ_BATT_GOV}" > ${CPUFREQ_DIR}/scaling_governor
		eend 0
	else
		eend 1
	fi
}

stop() {
	ebegin "Switching to ${CPUFREQ_NORMAL_GOV} CPU frequency governor..."
	if [ -w "${CPUFREQ_DIR}/scaling_governor" ] && [ -n "`grep ${CPUFREQ_NORMAL_GOV} ${CPUFREQ_DIR}/scaling_available_governors`" ]; then 
		echo "${CPUFREQ_NORMAL_GOV}" > ${CPUFREQ_DIR}/scaling_governor
		eend 0
	else
		eend 1
	fi
}