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Subject: Re: [PATCH] leds: triggers: introduce gpio led trigger
From: Richard Purdie <rpurdie@rpsys.net>
To: Felipe Balbi <felipe.balbi@nokia.com>
Cc: linux-kernel@vger.kernel.org,
       David Brownell <dbrownell@users.sourceforge.net>,
       Andrew Morton <akpm@linux-foundation.org>,
       Felipe Balbi <me@felipe.balbi.com>, Felipe Balbi <me@felipebalbi.com>
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Date: Tue, 17 Feb 2009 23:11:13 +0000
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On Tue, 2009-02-17 at 13:18 +0200, Felipe Balbi wrote:
> From: Felipe Balbi <me@felipe.balbi.com>
> 
> The gpio led trigger will allow leds to be triggered by
> gpio events.
> 
> When we give the led a gpio number, the trigger will
> request_irq() on that so we don't have to keep polling
> for gpio state.
> 
> It's useful for usecases as n810's keypad leds that could
> be triggered by the gpio event generated when user slides
> up to show the keypad.
> 
> We also provide means for userland to tell us what is the
> desired brightness for that special led when it goes on
> so userland could use information from ambient light sensors
> and not set led brightness too high if it's not necessary.
> 
> This trigger was tested with n810.

Added to the LED tree, thanks.

Richard


-- 
Richard Purdie
Intel Open Source Technology Centre