linux-kernel - Re: [patch 0/3] AHCI Link Power Management

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Message-Id: <20070612085600.72d02b19.kristen.c.accardi@intel.com>
Date:	Tue, 12 Jun 2007 08:56:00 -0700
From:	Kristen Carlson Accardi <kristen.c.accardi@...el.com>
To:	Tejun Heo <htejun@...il.com>
Cc:	Arjan van de Ven <arjan@...ux.intel.com>, jeff@...zik.org,
	james.bottomley@...eleye.com, linux-ide@...r.kernel.org,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Pavel Machek <pavel@....cz>, Jens Axboe <jens.axboe@...cle.com>
Subject: Re: [patch 0/3] AHCI Link Power Management

On Tue, 12 Jun 2007 13:40:15 +0900
Tejun Heo <htejun@...il.com> wrote:

> I don't think the end result will vary in any significant way.  My
> biggest argument for sw implementation is it can be used for other
> controllers.

What I had in mind when I created the new port operation "enable_pm"
was that other controllers (besides the ahci controller) could define their
own method of enabling power management.  Maybe for non-ahci controllers this
is a software based solution which uses generic SATA dipm/hipm stuff and 
polling.  

See patch 2/3 of this series for the implementation of this.

Kristen
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