I was wondering if anyone is aware of how I can change the CPU Core Voltage of a Raspberry pi using system calls from the terminal. I know that we can do this by setting the over_voltage parameter in /boot/config.txt but I was wondering that since some module reads that file to essentially set the voltage and frequency during boot there might be a way to change this from the terminal. I am using a Raspberry Pi 3B+.
I also know that the frequency of the device can be changed using the files in /sys/devices/system/cpu/cpu0/cpufreq but I am specifically looking to see if we can change the voltage of the device in a similar way from the command line after the boot process.
Thank you for any help and suggestions I can get.