test-dvfs.sh

#!/bin/sh

if [ "$#" -gt 0 ] ; then
	if [ "$1" == "1" ] ; then
		CPU="cpu0"
		MSR="sys_cpu_div16"
		devmem 0xFF63C15C 32 0x15002A2
	elif [ "$1" == "2" ] ; then
		CPU="cpu2"
		MSR="sys_cpub_div16"
		devmem 0xFF63C200 32 0x15002A2
	else
		echo "Invalid CPU cluster"
		exit 1
	fi
else
	echo "Usage: $0 <cpu cluster, 1 or 2> [debug]"
	exit 1
fi

DEBUG="$2"

# mount debugfs if not mounted yet
[ -d /sys/kernel/debug/meson-clk-msr ] || mount -t debugfs none /sys/kernel/debug

FREQS=`cat /sys/bus/cpu/devices/$CPU/cpufreq/scaling_available_frequencies`
echo 1 > /sys/bus/cpu/devices/$CPU/cpufreq/stats/reset
while true ; do
	clear
	cat /sys/bus/cpu/devices/$CPU/cpufreq/stats/trans_table
        for f in $FREQS ; do
                TARGET=`expr $f \* 1000`
		[ $DEBUG ] && echo "=> $TARGET"
        	echo $f > /sys/bus/cpu/devices/$CPU/cpufreq/scaling_setspeed ;
                MIN=`expr $TARGET \* 99 / 100`
                MAX=`expr $TARGET \* 101 / 100`
                CUR=`cat /sys/kernel/debug/meson-clk-msr/clks/$MSR | cut -f 1`
                CURRENT=`expr $CUR \* 16`
		[ $DEBUG ] && echo "<= $CURRENT"
                if [ $CURRENT -gt $MAX -o $CURRENT -lt $MIN ] ; then
                        echo invalid $CURRENT != $TARGET
                        exit 1
                fi
                [ $DEBUG ] && echo $TARGET == $CURRENT
                for g in $FREQS ; do
                        TARGET=`expr $g \* 1000`
			[ $DEBUG ] && echo "=> $TARGET"
                        echo $g > /sys/bus/cpu/devices/$CPU/cpufreq/scaling_setspeed ;
                        MIN=`expr $TARGET \* 99 / 100`
                        MAX=`expr $TARGET \* 101 / 100`
                        CUR=`cat /sys/kernel/debug/meson-clk-msr/clks/$MSR | cut -f 1`
                        CURRENT=`expr $CUR \* 16`
			[ $DEBUG ] && echo "<= $CURRENT"
                        [ $DEBUG ] && echo $TARGET == $CURRENT
                        if [ $CURRENT -gt $MAX -o $CURRENT -lt $MIN ] ; then
                                echo invalid $CURRENT != $TARGET
                                exit 1
                        fi
                        TARGET=`expr $f \* 1000`
			[ $DEBUG ] && echo "=> $TARGET"
                        echo $f > /sys/bus/cpu/devices/$CPU/cpufreq/scaling_setspeed ;
                        MIN=`expr $TARGET \* 99 / 100`
                        MAX=`expr $TARGET \* 101 / 100`
                        CUR=`cat /sys/kernel/debug/meson-clk-msr/clks/$MSR | cut -f 1`
                        CURRENT=`expr $CUR \* 16`
			[ $DEBUG ] && echo "<= $CURRENT"
                        [ $DEBUG ] && echo $TARGET == $CURRENT
                        if [ $CURRENT -gt $MAX -o $CURRENT -lt $MIN ] ; then
                                echo invalid $CURRENT != $TARGET
                                exit 1
                        fi
                done
        done
done