linux-kernel - Re: [PATCH v3 06/13] dt-bindings: reserved-memory: Wakeup Mailbox for Intel processors

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Message-ID: <20250506-pompous-meaty-crane-97efce@kuoka>
Date: Tue, 6 May 2025 09:10:22 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Cc: x86@...nel.org, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Rob Herring <robh@...nel.org>, 
	"K. Y. Srinivasan" <kys@...rosoft.com>, Haiyang Zhang <haiyangz@...rosoft.com>, 
	Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>, 
	Michael Kelley <mhklinux@...look.com>, devicetree@...r.kernel.org, 
	Saurabh Sengar <ssengar@...ux.microsoft.com>, Chris Oo <cho@...rosoft.com>, linux-hyperv@...r.kernel.org, 
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org, 
	"Ravi V. Shankar" <ravi.v.shankar@...el.com>, Ricardo Neri <ricardo.neri@...el.com>
Subject: Re: [PATCH v3 06/13] dt-bindings: reserved-memory: Wakeup Mailbox
 for Intel processors

On Mon, May 05, 2025 at 10:16:10PM GMT, Ricardo Neri wrote:
> > If this is a device, then compatibles specific to devices. You do not
> > get different rules than all other bindings... or this does not have to
> > be binding at all. Why standard reserved-memory does not work for here?
> > 
> > Why do you need compatible in the first place?
> 
> Are you suggesting something like this?
> 
> reserved-memory {
> 	# address-cells = <2>;
> 	# size-cells = <1>;
> 
> 	wakeup_mailbox: wakeupmb@...000 {
> 		reg = < 0x0 0xfff000 0x1000>
> 	}
> 
> and then reference to the reserved memory using the wakeup_mailbox
> phandle?

Yes just like every other, typical reserved memory block.

Best regards,
Krzysztof