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#!/bin/bash -e
shopt -s nullglob
case "$1" in
start)
. /etc/default/phc-intel
if [ -z "$VIDS" ]; then
echo '=> Please edit /etc/default/phc-intel'
exit 1
fi
echo ':: Setting PHC VIDs'
for i in /sys/devices/system/cpu/cpu*/cpufreq/phc_vids; do
echo $VIDS > "$i"
done
;;
stop)
echo ':: Resetting default PHC VIDs'
for i in /sys/devices/system/cpu/cpu*/cpufreq; do
[ -e "$i/phc_default_vids" -a -e "$i/phc_vids" ] && cp "$i"/phc_{default_,}vids
done
;;
status)
check_off () {
for i in /sys/devices/system/cpu/cpu*/cpufreq; do
[ "$(< $i/phc_vids)" = "$(< $i/phc_default_vids)" ] || return;
done
}
check_on () {
for i in /sys/devices/system/cpu/cpu*/cpufreq/phc_vids; do
[[ "$(< $i)" =~ "$VIDS" ]] || return;
done
}
echo -n 'PHC status: '
. /etc/default/phc-intel
if check_off; then
echo 'inactive'
elif check_on; then
echo 'active'
else
echo 'unknown'
fi
;;
setup)
echo ':: Removing old phc-intel modules'
echo
for i in /usr/lib/modules/*; do
if [ -f "$i/phc-intel.ko" -a ! -f "$i/version" ]; then
rm -f "$i/phc-intel.ko"
rmdir --ignore-fail-on-non-empty "$i"
elif [ -f "$i/extra/phc-intel.ko" -a ! -d "$i/kernel" ]; then
rm -f "$i/extra/phc-intel.ko"
rmdir -p --ignore-fail-on-non-empty "$i/extra"
fi
done
echo ':: Compiling new phc-intel module'
echo
cd /usr/src/phc-intel/
make
echo
echo ':: Installing new phc-intel module'
echo
make install
echo
echo ':: Cleaning up'
echo
make clean
;;
set)
. /etc/default/phc-intel
[ -z "$VIDS" ] && exit
for i in $(< /proc/cmdline); do
[ $i = nophc ] && exit
done
for i in /sys/devices/system/cpu/cpu*/cpufreq/phc_vids; do
echo $VIDS > "$i"
done
;;
*)
echo "usage: $0 {start|stop|status|setup|set}"
esac
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