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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <b7bfe424-2cfd-4897-ab0d-69c8e92acf24@kernel.org>
Date: Sun, 24 Aug 2025 19:00:22 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Tudor Ambarus <tudor.ambarus@...aro.org>, Rob Herring <robh@...nel.org>
Cc: Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Peter Griffin
 <peter.griffin@...aro.org>, André Draszik
 <andre.draszik@...aro.org>, Michael Turquette <mturquette@...libre.com>,
 Stephen Boyd <sboyd@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>,
 Sylwester Nawrocki <s.nawrocki@...sung.com>,
 Chanwoo Choi <cw00.choi@...sung.com>, linux-kernel@...r.kernel.org,
 linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
 willmcvicker@...gle.com, kernel-team@...roid.com
Subject: Re: [PATCH 1/3] dt-bindings: firmware: google,gs101-acpm-ipc: add
 clocks node

On 22/08/2025 17:03, Tudor Ambarus wrote:
> 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     

Please unwrap the acronym in one place of bindings commit msgs.

> 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.

Rest of Rob's comment seems valid, so this also invalidates the DTS.


Best regards,
Krzysztof