i.MX8QM disable Cortex-A cores and power management

[rkohli2000]

Hi,

I'd like to disable Cortex-A (and/or Cortex-M) cores for the iMX8QM MEK at start up. Potentially disable the cores at run time as well. Are there any examples/explanations of this ?

Also, about the power management features available for Cortex-A we can use for the iMX8QM.

My image is not using U-boot. The image has scfw, mx8qm-ahab-container.img and bl31.bin to boot the Cortex-A test image.

Thank you.

[igorpadykov]

Hi rkohli2000

for such example one can look at  i.MX8 Android Auto releases,

in this case the M4 is the parent of the AP and M4 boots the AP via sc_pm_boot()

https://www.nxp.com/design/software/embedded-software/i-mx-software/android-os-for-i-mx-applications...

Best regards
igor