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|
#!/bin/sh
#
# This script adjusts the power control of a set of PCI devices that
# prove beneficial to enable power savings
#
PCI_DEVICES_PM_ENABLE="${PCI_DEVICES_PM_ENABLE:-true}"
set_pci_device()
{
for dev in /sys/bus/pci/devices/* ; do
if [ -e $dev/class -a -e $dev/power/control ]; then
id=`basename $dev`
case `cat $dev/class` in
0x020000) # ethernet
echo "Setting Ethernet device $id to $1"
echo $1 > $dev/power/control
;;
0x028000) # wireless
echo "Setting Wireless device $id to $1"
echo $1 > $dev/power/control
;;
0x040300) # audio
echo "Setting Audio device $id to $1"
echo $1 > $dev/power/control
;;
0x060000) # host bridge
echo "Setting Host Bridge $id to $1"
echo $1 > $dev/power/control
;;
0x080500) # SD card reader
echo "Setting SD card reader device $id to $1"
echo $1 > $dev/power/control
;;
0x088000|0x088001) # card reader
echo "Setting card reader device $id to $1"
echo $1 > $dev/power/control
;;
0x0c0000|0x0c0010) # firewire
echo "Setting FireWire device $id to $1"
echo $1 > $dev/power/control
;;
esac
fi
done
}
case "$1" in
true) # powersaving on
[ "$PCI_DEVICES_PM_ENABLE" = true ] && set_pci_device "auto"
;;
false) # powersaving off
[ "$PCI_DEVICES_PM_ENABLE" = true ] && set_pci_device "on"
;;
*)
exit 254
;;
esac
exit 0
|
