linux-kernel - Re: [RFC PATCH 0/9] dt: dependencies (for deterministic driver initialization order based on the DT)

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Message-ID: <53FED13C.4070606@ahsoftware.de>
Date:	Thu, 28 Aug 2014 08:50:36 +0200
From:	Alexander Holler <holler@...oftware.de>
To:	Stephen Warren <swarren@...dotorg.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Grant Likely <grant.likely@...aro.org>
CC:	Mark Rutland <Mark.Rutland@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Jon Loeliger <jdl@....com>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC PATCH 0/9] dt: dependencies (for deterministic driver initialization
 order based on the DT)

Am 27.08.2014 18:37, schrieb Stephen Warren:

> Of course, there are probably cases where we could/should add some more
> phandles/... and likewise cases where we shouldn't. That's why detailed
> research is needed.

Just because I'm curious, I wonder how this research does or shoud look 
like.

Defered probes did come to light with 3.4, that was more than 2 years 
ago. Ok, most people (like me) just noticed it during the last months 
when they switched to DT and have run into a problem (the deferred probe 
mechanism is an error-message killer), but some must have seen it 
already 2 years ago.

And I wonder how the ACPI world solves that problem. My guess would be 
hardcoded stuff in the firmware-blob (BIOS), just like it happened with 
board files, but I've never seen BIOS code and my knowledge about ACPI 
is almost zero. ;)

Regards,

Alexander Holler
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