linux-kernel - Re: [PATCH]input: Change timer function to workqueue for gpio

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Date:	Thu, 25 Jun 2009 23:48:46 +0800
From:	Alek Du <alek.du@...el.com>
To:	Jani Nikula <ext-jani.1.nikula@...ia.com>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Trilok Soni <soni.trilok@...il.com>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	"ben-linux@...ff.org" <ben-linux@...ff.org>
Subject: Re: [PATCH]input: Change timer function to workqueue for gpio_keys
 driver

On Thu, 25 Jun 2009 23:42:08 +0800
Jani Nikula <ext-jani.1.nikula@...ia.com> wrote:

> On Thu, 2009-06-25 at 17:09 +0200, ext Alek Du wrote:
> > On Thu, 25 Jun 2009 23:05:55 +0800
> > Jani Nikula <ext-jani.1.nikula@...ia.com> wrote:
> > > Actually scrap that, the input layer already ignores events with no
> > > state changes, right?
> > > 
> > Yes, correct. I just want to reply your previous mail, but seems you find that. :-)
> 
> The point about your patch breaking debouncing is still valid, though.
> 
>
How? If IRQ triggered then the delay work scheduled, after debouncing time, in work, it checks GPIO pin state again,
if pin is active, send "1" to input layer -- key pressed, if de-active, send "0" -- no event. 

I really did test on my board, could you also try it out?

Thanks,
Alek
> BR,
> Jani.
> 
> 
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