recipes/pandora-system/pandora-scripts/op_cpuspeed.sh

   1 #!/bin/bash
   2 #get value range
   3 minmhz="$(cat /etc/pandora/conf/cpu.conf | grep 'min:' | awk -F\: '{print $2}')"
   4 safemhz="$(cat /etc/pandora/conf/cpu.conf | grep 'safe:' | awk -F\: '{print $2}')"
   5 maxmhz="$(cat /etc/pandora/conf/cpu.conf | grep 'max:' | awk -F\: '{print $2}')"
   6 warn="$(cat /etc/pandora/conf/cpu.conf | grep 'warn:' | awk -F\: '{print $2}')"
   7 device=/proc/pandora/cpu_mhz_max
   8 curmhz="$(cat $device)"
   9 newmhz="$(cat $device)"
  10
  11 if [ "$1" = "-n" ]; then
  12     shift
  13     warn=no
  14 fi
  15
  16 if [ ! -e $device ]; then
  17     if [ -z "$1" -a -n "$DISPLAY" ]; then
  18         zenity --info --title="CPU-Settings not supported" --text \
  19             "Sorry, the experimental kernel does not support setting the clockspeed (yet)."
  20     fi
  21     exit 1
  22 fi
  23
  24 if [ ! $1 ]; then
  25         if [ $DISPLAY ]; then
  26                 newmhz=$(zenity --scale --text "Set CPU clockspeed" --min-value=$minmhz --max-value=$maxmhz --value=$curmhz --step 1)
  27         else
  28                 read -p "Please enter the desired clockspeed: " newmhz
  29         fi
  30 else
  31         newmhz=$1
  32 fi
  33
  34 if ! [ 0 -lt "$newmhz" -a "$newmhz" -lt 10000 ]; then
  35         echo "invalid argument: $newmhz"
  36         exit 1
  37 fi
  38
  39 if [ $newmhz ]; then
  40         if [ $newmhz -gt $safemhz ]; then
  41                 if [ $warn != no ]; then
  42                         if [ $DISPLAY ]; then
  43                                 answer=$(zenity --question --title "Alert" --text "You are trying to set the CPU clock to $newmhz which is above the warning level of $safemhz, doing so may burn down your house, sour milk, or just blow up (OK, not that likely)! Proceed?";echo $?)
  44                                 echo $answer
  45                                 if [ $answer = 1 ]; then exit 1; fi
  46                         else
  47                                 answer="n";read -p "You are trying to set the CPU clock to $newmhz which is above the warning level of $safemhz, doing so may burn down your house, sour milk, or just blow up (OK, not that likely)! Proceed? [y/n]" -t 10 answer
  48                                 echo $answer
  49                                 if [ $answer = n ]; then exit 1; fi
  50                         fi
  51                 fi
  52         fi
  53
  54         if [ $newmhz -le $minmhz ]; then newmhz=$minmhz; fi
  55         if [ $newmhz -ge $maxmhz ]; then newmhz=$maxmhz; fi
  56         echo $newmhz > $device
  57         echo cpu_mhz_max set to $(cat $device)
  58
  59         if [ -e /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor ]; then
  60                 # must poke cpufreq so it does the actual clock transition
  61                 # according to new limits
  62                 gov=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor)
  63                 echo $gov > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
  64         fi
  65 fi