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