Hi,
We have a beaglebone black reference design based embedded platform that has a AM3351 ZCE instead of AM3357. With this processor, VDD_MPU is tied to VDD_CORE as per it's datasheet.
In the device tree file for beaglebone black, the following section supplies the pmic dcdc regulator corresponding to VDD_MPU for DVFS.
cpus {
cpu@0 {
cpu0-supply = <&dcdc2_reg>;
};
};
For AM3351 ZCE, do I change this to the regulator for VDD_CORE, which also supplies VDD_MPU internally? During DVFS, this would also scale the VDD_CORE voltage in step with VDD_MPU. Is this OK?
I already tested this change and things look to be working fine. I just want to confirm that this is the recommended way to allow DVFS and that there aren't any subtle side effects I might be missing.
cheers,
Arun
