#!/bin/sh
#
###############################################################################
# Copyright (C) 2005 Francois COJEAN
# Copyleft 2007 Sun Seng David TAN

# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
###############################################################################

# this script change the CPU governor according to the temperature detected.
# Note : this script need to be run as root.
# TODO : maybe use inotify

# Set up the different variables
# Edit all this variable to value which fit to your computer

POWERSAVE_SCALING_GOVERNOR="powersave"
CONSERVATIVE_SCALING_GOVERNOR="conservative"
ONDEMAND_SCALING_GOVERNOR="ondemand"

CPU_FREQ_PATH="/sys/devices/system/cpu/cpu0/cpufreq"
SCALING_GOVERNOR_FILE="scaling_governor"
TEMPERATURE_ACPI_PATH="/proc/acpi/thermal_zone/TZS0"

TEMPERATURE_MAX=87
TEMPERATURE_SAFE=73



while true; do
TEMPERATURE="`cat $TEMPERATURE_ACPI_PATH/temperature |cut -d' ' -f14`"
echo $TEMPERATURE
if [ $TEMPERATURE -gt $TEMPERATURE_MAX ]
then
echo "$POWERSAVE_SCALING_GOVERNOR" > $CPU_FREQ_PATH/$SCALING_GOVERNOR_FILE
echo "CPU_FREQ : $POWERSAVE_SCALING_GOVERNOR enable"
fi
if [ $TEMPERATURE -lt $TEMPERATURE_SAFE ]
then
echo "$ONDEMAND_SCALING_GOVERNOR" > $CPU_FREQ_PATH/$SCALING_GOVERNOR_FILE
echo "CPU_FREQ : $ONDEMAND_SCALING_GOVERNOR enable"
fi
sleep 1
done