Hi, Rob,

On 8/22/25 2:55 PM, Rob Herring wrote:

On Tue, Aug 19, 2025 at 11:45:36AM +0000, Tudor Ambarus wrote:

quoted

The firmware exposes clocks that can be controlled via the ACPM
interface. Describe the clocks exposed by the APM firmware.

ACPM? APM is Advanced Power Management aka the predecessor to ACPI?

ACPM (Alive Clock and Power Manager) is a firmware that operates on the                                 
APM (Active Power Management) module that handles overall power management                              
activities. APM is built around a GREBE processor.

In linux we have an ACPM protocol driver that communicates with the firmware
via mailbox channels. It's similar to arm,scmi if you want.

Cheers,
ta