Re: [PATCH 1/3] dt-bindings: firmware: google,gs101-acpm-ipc: add clocks node

[Tudor Ambarus]

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:
>> 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