linux-kernel - Re: leds-hp-disk vs lis3lv02d

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Date:	Mon, 27 Oct 2008 14:03:44 +0100
From:	Pavel Machek <pavel@...e.cz>
To:	Thomas Renninger <trenn@...e.de>
Cc:	Eric Piel <eric.piel@...mplin-utc.net>, akpm@...ux-foundation.org,
	burman.yan@...il.com, rpurdie@...ys.net,
	LKML <linux-kernel@...r.kernel.org>,
	Len Brown <len.brown@...el.com>,
	Kay Sievers <kasievers@...e.de>, hmh@....eng.br
Subject: Re: leds-hp-disk vs lis3lv02d


> > OTOH  it should 
> > not block merge; both drivers still work and are useful.
> But for long-term the HPQ0004 specific things in the lids3v driver should get 
> merged with your HP leds driver also registering for HPQ0004 and the lids3v 
> specific things should get a separate driver which HPQ0004 driver makes use 
> of?

Yep, that sounds sane.

> Pavel: I am also not sure whether it's a good idea to mis-use the HP's LED for 
> mail notification or similar or to expose this one as a general LED. This LED 
> is intended to be used with the disk parking feature by the vendor?
> I don't know the LED interface well, but if it's now possible that
> every mail 

That's how LED interface works. This _is_ general LED.

Check permissions in /sys; root  permissons should be needed to
blink the LED.

> or other app can reprogram the disk parking LED for it's own purposes, this 
> sounds wrong. The LED can still be accessed and activated, e.g. when disk 
> gets parked behind the OS'es back. If this is a nice hack to e.g. use LED for 
> suspend debugging or similar, then it should be well hidden to the outside 
> world.

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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