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 $device)"
  10
  11 if [ "$curmhz" -gt "$maxmhz" ]; then
  12   curmhz=$maxmhz
  13 fi
  14
  15 if [ "$1" = "-n" ]; then
  16     shift
  17     warn=no
  18 fi
  19
  20 if [ ! -e $device ]; then
  21     if [ -z "$1" -a -n "$DISPLAY" ]; then
  22         zenity --info --title="CPU-Settings not supported" --text \
  23             "Sorry, the experimental kernel does not support setting the clockspeed (yet)."
  24     fi
  25     exit 1
  26 fi
  27
  28 if [ ! $1 ]; then
  29         if [ $DISPLAY ]; then
  30                 newmhz=$(zenity --scale --text "Set CPU clockspeed" --min-value=$minmhz --max-value=$maxmhz --value=$curmhz --step 1)
  31         else
  32                 read -p "Please enter the desired clockspeed: " newmhz
  33         fi
  34 else
  35         newmhz=$1
  36 fi
  37
  38 if ! [ 0 -lt "$newmhz" -a "$newmhz" -lt 10000 ]; then
  39         echo "invalid argument: $newmhz"
  40         exit 1
  41 fi
  42
  43 if [ $newmhz ]; then
  44         if [ $newmhz -gt $safemhz ]; then
  45                 if [ $warn != no ]; then
  46                         if [ $DISPLAY ]; then
  47                                 answer=$(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 $?)
  48                                 echo $answer
  49                                 if [ $answer = 1 ]; then exit 1; fi
  50                         else
  51                                 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
  52                                 echo $answer
  53                                 if [ $answer = n ]; then exit 1; fi
  54                         fi
  55                 fi
  56         fi
  57
  58         if [ $newmhz -le $minmhz ]; then newmhz=$minmhz; fi
  59         if [ $newmhz -ge $maxmhz ]; then newmhz=$maxmhz; fi
  60         echo $newmhz > $device
  61         echo cpu_mhz_max set to $(cat $device)
  62
  63         if [ -e /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor ]; then
  64                 # must poke cpufreq so it does the actual clock transition
  65                 # according to new limits
  66                 gov=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor)
  67                 echo $gov > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
  68                 if [ "$gov" = "userspace" ]; then
  69                         echo $[ $newmhz * 1000 ] > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
  70                 fi
  71         fi
  72 fi