Changing the GPU clock speed on jetson nano

So, I have been following this site (Jetson/Performance - eLinux.org) to change the clock speed on my jetson nano. But it seems that I cannot change the GPU clock as mentioned here. The instruction given here are:

 echo 852000000 > /sys/kernel/debug/clock/override.gbus/rate
 echo 1 > /sys/kernel/debug/clock/override.gbus/state

I have changed to location of the files. So the command I run is:

 echo 852000000 > /sys/kernel/debug/clk/override.gbus/clk_rate
 echo 1 > /sys/kernel/debug/clk/override.gbus/clk_state

But I keep getting permission denied error even when I’m running with the super user.

That Jetson/Performance - eLinux.org can’t work on Nano, please refer to NVIDIA Jetson Linux Driver Package Software Features : Clock Frequency and Power Management | NVIDIA Docs

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