i.MX8 QuadMax: Powering off CPU cores

[alvaro_tx]

Hi, in order to save power consumption I would like to power off entire cores domains (A72, A53, GPU) like mentioned on AN13249. However, there is no explanation on how to do this. 

I tried using (echo 0 > /sys/devices/system/cpu/cpuX/online) but that barely changes the power consumption. 

Any help?

Thanks, 
Alvaro.

[Rita_Wang]

Which version are you using, I am not sure if this command is work or not?

[alvaro_tx]

Downstream Linux 5.15 

The command works to disable the access to Linux (I can no longer see the cores with /proc/cpuinfo), but doesn't seem to work to power off the cores.