#!/bin/bash
|
|
DMC_PATH1=/sys/class/devfreq/dmc
|
DMC_PATH2=/sys/bus/platform/drivers/rk3399-dmc-freq/dmc/devfreq/dmc
|
|
if [ -d "$DMC_PATH1" ];then
|
DMC_PATH=$DMC_PATH1
|
elif [ -d $DMC_PATH2 ];then
|
DMC_PATH=$DMC_PATH2
|
else
|
echo "non-existent dmc path,please check if enable dmc"
|
exit
|
fi
|
|
echo "DMC_PATH:"$DMC_PATH
|
|
if [ "$#" -eq "1" ];then
|
echo userspace > $DMC_PATH/governor
|
echo $1 > $DMC_PATH/userspace/set_freq
|
val=$(cat $DMC_PATH/cur_freq)
|
echo "already change to" $val"Hz done."
|
array=$(cat $DMC_PATH/available_frequencies)
|
let j=${#array[@]}-1
|
if [ "$val" -eq "${array[j]}" ];then
|
echo "change frequency to available max frequency done."
|
else
|
echo "!!!warning!!!"
|
echo "!!!warning!!! available max frequency is" ${array[j]}"Hz"
|
echo "!!!warning!!! please check frequency" $val"Hz if you need."
|
echo "!!!warning!!!"
|
fi
|
exit
|
else
|
unset FREQS
|
read -a FREQS < $DMC_PATH/available_frequencies
|
|
RANDOM=$$$(date +%s)
|
while true; do
|
echo userspace > $DMC_PATH/governor
|
FREQ=${FREQS[$RANDOM % ${#FREQS[@]} ]}
|
echo "set ddr frequency to $FREQ"
|
echo ${FREQ} > $DMC_PATH/userspace/set_freq
|
done
|
fi
|
