linux-kernel - Re: [PATCH v9 09/21] ARM64 / ACPI: Introduce early

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Message-ID: <20150305181131.GC4932@quad.lixom.net>
Date:	Thu, 5 Mar 2015 10:11:31 -0800
From:	Olof Johansson <olof@...om.net>
To:	Hanjun Guo <hanjun.guo@...aro.org>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Will Deacon <will.deacon@....com>,
	Grant Likely <grant.likely@...aro.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Mark Rutland <mark.rutland@....com>,
	Graeme Gregory <graeme.gregory@...aro.org>,
	Sudeep Holla <Sudeep.Holla@....com>,
	Jon Masters <jcm@...hat.com>,
	Marc Zyngier <marc.zyngier@....com>,
	Mark Brown <broonie@...nel.org>,
	Robert Richter <rric@...nel.org>,
	Timur Tabi <timur@...eaurora.org>,
	Ashwin Chaugule <ashwinc@...eaurora.org>,
	suravee.suthikulpanit@....com, linux-acpi@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linaro-acpi@...ts.linaro.org, Al Stone <al.stone@...aro.org>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: Re: [PATCH v9 09/21] ARM64 / ACPI: Introduce early_param "acpi=" to
 enable/disable ACPI

On Wed, Feb 25, 2015 at 04:39:49PM +0800, Hanjun Guo wrote:
> From: Al Stone <al.stone@...aro.org>
> 
> This implements the following policy to decide whether ACPI should
> be used to boot the system:
> - acpi=off: ACPI will not be used to boot the system, even if there is
>   no alternative available (e.g., device tree is empty)
> - acpi=force: only ACPI will be used to boot the system; if that fails,
>   there will be no fallback to alternative methods (such as device tree)
> - otherwise, ACPI will be used as a fallback if the device tree turns out
>   to lack a platform description; the heuristic to decide this is whether
>   /chosen is the only node present at depth 1
> 
> CC: Catalin Marinas <catalin.marinas@....com>
> CC: Will Deacon <will.deacon@....com>
> CC: Rafael J. Wysocki <rjw@...ysocki.net>
> Signed-off-by: Al Stone <al.stone@...aro.org>
> Signed-off-by: Graeme Gregory <graeme.gregory@...aro.org>
> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>

Acked-by: Olof Johansson <olof@...om.net>



-Olof
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