Date: Thu, 25 Oct 2007 14:50:47 -0700
From: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
To: Ingo Oeser <ioe-lkml@rameria.de>
Cc: akpm@linux-foundation.org, jeff@garzik.org, linux-ide@vger.kernel.org,
       linux-kernel@vger.kernel.org, Richard Purdie <rpurdie@openedhand.com>
Subject: Re: [PATCH] ata: ahci: Enable enclosure management via LED (resend)
Message-Id: <20071025145047.1c5e96f3.kristen.c.accardi@intel.com>
In-Reply-To: <200710252335.12975.ioe-lkml@rameria.de>
References: <20071024155845.5129d6a4.kristen.c.accardi@intel.com>
	<200710252335.12975.ioe-lkml@rameria.de>
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On Thu, 25 Oct 2007 23:35:11 +0200
Ingo Oeser <ioe-lkml@rameria.de> wrote:

> Hi Kristen,
> 
> On Thursday 25 October 2007, Kristen Carlson Accardi wrote:
> > Enable enclosure management via LED
> > 
> > As described in the AHCI spec, some AHCI controllers may support 
> > Enclosure management via a variety of protocols.  This patch
> > adds support for the LED message type that is specified in 
> > AHCI 1.1 and higher.
> 
> Linux has a LED subsystem for that. May I suggest, that you just register
> these leds and let userspace handle them via that via the LED API?
> 
> The LED userspace API is described in Documentation/leds-class.txt
> and the headers for registering LEDs is linux/leds.h under include/
> 
> Since you explicitly WANT user space to control these, that should
> be the right API. 
> 
> Richard, what do YOU think?
> 
> 
> Best Regards
> 
> Ingo Oeser
> 

I did look into using the LED class for this, but it didn't appropriate
as I wanted the leds to be associated with a particular disk, and not
with the platform as a whole.  It seemed to me that the led_class was 
a bit of overkill for what we needed to do here, since we just need 
on/off and nothing else.
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