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
