Script to set core and memory frequencies on the NVIDIA Jetson TK1 board.

set_clocks_jetson.sh

#!/bin/bash

if [ $# -ne 2 ]; then
  echo "Format: set_clocks.sh <core_clock (kHz)> <mem_clock (kHz)>"
  exit -1
fi

echo "Supported core clocks:"
cat /sys/kernel/debug/clock/gbus/possible_rates

echo ""
echo "Supported memory clocks:"
cat /sys/kernel/debug/clock/emc/possible_rates

echo ""
echo -n "Current core clock: "
cat /sys/kernel/debug/clock/gbus/rate
echo -n "Current memory clock: "
cat /sys/kernel/debug/clock/emc/rate

echo ""

echo $(($1 * 1000)) > /sys/kernel/debug/clock/override.gbus/rate
echo 1 > /sys/kernel/debug/clock/override.gbus/state

echo -n "New clock rate: "
cat /sys/kernel/debug/clock/gbus/rate

echo $(($2 * 1000)) > /sys/kernel/debug/clock/override.emc/rate
echo 1 > /sys/kernel/debug/clock/override.emc/state

echo -n "New memory clock rate: "
cat /sys/kernel/debug/clock/emc/rate