Vdd-gpu and vdd-cpu doesn't contain (current) voltage file in Jetson Nano

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

Hi all,

I have been trying to get my CPU & GPU max, min, and current voltage supplies in my Jetson Nano device. When I accessed the following path in my Jetson: /sys/kernel/debug/regulator. I found already the min_uv and max_uv files in it but I didn’t manage to find the “voltage” file or “current_voltage” file.

I checked a work which was done on Jetson TX2 and it seems they can find the CPU & GPU max, min, and current voltage files in the following directory: /sys/kernel/debug/bpmp/debug/regulator/.

Can anyone guide me on how to access the current voltage file in Jetson Nano?

4

Hi,

What is your purpose for accessing the voltage file? Changing the configuration could risk damaging the device.

For example, to access cpu0, you can retrieve the file from /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq.
For the GPU, the file can be found at /sys/class/devfreq/*.gpu/max_freq.

Also you can execute jetson_clocks --show to display current setting.

Thanks

5

Hi David,

Thank you for the help.

I think the files cpuinfo_max_freq and max_freq give me the maximum frequency for the Jetson device. I was wondering how to get access to the current voltage, the same as min_uv and max_uv provide.

6

Hi,

You can refer to this document to check the current voltage if your Jetson Nano is equipped with the INA3221 sensor.

Thanks

8

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.