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

   1 #!/bin/bash
   2 #get value range
   3 cpu_conf=/etc/pandora/conf/cpu.conf
   4 minmhz="$(grep '^min:' $cpu_conf | awk -F\: '{print $2}')"
   5 safemhz="$(grep '^safe:' $cpu_conf | awk -F\: '{print $2}')"
   6 maxmhz="$(grep '^max:' $cpu_conf | awk -F\: '{print $2}')"
   7 warn="$(grep '^warn:' $cpu_conf | awk -F\: '{print $2}')"
   8 device=/proc/pandora/cpu_mhz_max
   9 curmhz="$(cat $device)"
  10 newmhz="$(cat $device)"
  11
  12 if [ "$curmhz" -gt "$maxmhz" ]; then
  13   curmhz=$maxmhz
  14 fi
  15
  16 if [ "$1" = "-n" ]; then
  17     shift
  18     warn=no
  19 fi
  20
  21 if [ ! -e $device ]; then
  22     if [ -z "$1" -a -n "$DISPLAY" ]; then
  23         zenity --info --title="CPU-Settings not supported" --text \
  24             "Sorry, the experimental kernel does not support setting the clockspeed (yet)."
  25     fi
  26     exit 1
  27 fi
  28
  29 if [ ! $1 ]; then
  30         if [ $DISPLAY ]; then
  31                 newmhz=$(zenity --scale --title "CPU clockspeed" --text "Set CPU clockspeed" --min-value=$minmhz --max-value=$maxmhz --value=$curmhz --step 1)
  32         else
  33                 read -p "Please enter the desired clockspeed: " newmhz
  34         fi
  35 else
  36         newmhz=$1
  37 fi
  38
  39 if ! [ 0 -lt "$newmhz" -a "$newmhz" -lt 10000 ]; then
  40         echo "invalid argument: $newmhz"
  41         exit 1
  42 fi
  43
  44 if [ $newmhz ]; then
  45         if [ $newmhz -gt $safemhz ]; then
  46                 if [ $warn != no ]; then
  47                         if [ $DISPLAY ]; then
  48                                 answer=$(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 $?)
  49                                 echo $answer
  50                                 if [ $answer = 1 ]; then exit 1; fi
  51                         else
  52                                 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
  53                                 echo $answer
  54                                 if [ $answer = n ]; then exit 1; fi
  55                         fi
  56                 fi
  57         fi
  58
  59         if [ $newmhz -le $minmhz ]; then newmhz=$minmhz; fi
  60         if [ $newmhz -ge $maxmhz ]; then newmhz=$maxmhz; fi
  61         echo $newmhz > $device
  62         echo "cpu_mhz_max set to $(cat $device)"
  63
  64         if [ -e /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor ]; then
  65                 # must poke cpufreq so it does the actual clock transition
  66                 # according to new limits
  67                 gov=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor)
  68                 echo $gov > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
  69                 if [ "$gov" = "userspace" ]; then
  70                         echo $[ $newmhz * 1000 ] > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
  71                 fi
  72                 echo "current CPU clock is $(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq)"
  73         fi
  74 fi