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From: Haavard Skinnemoen <hskinnemoen@atmel.com>
To: David Brownell <david-b@pacbell.net>
Cc: Linux Kernel list <linux-kernel@vger.kernel.org>,
	Andrew Victor <andrew@sanpeople.com>,
	Milan Svoboda <msvoboda@ra.rockwell.com>
Subject: Re: [patch 2.6.20-rc2] gpio_direction_output() needs an initial value
Date: Fri, 2 Mar 2007 10:26:17 +0100	[thread overview]
Message-ID: <20070302102617.2fb8e0dc@dhcp-252-105.norway.atmel.com> (raw)
In-Reply-To: <200703011825.10370.david-b@pacbell.net>

On Thu, 1 Mar 2007 18:25:09 -0800
David Brownell <david-b@pacbell.net> wrote:

> It's been pointed out that output GPIOs should have an initial value, to
> avoid signal glitching ... among other things, it can be some time before
> a driver is ready.  This patch corrects that oversight, fixing
> 
>  - documentation
>  - platforms supporting the GPIO interface
>  - users of that call (just one for now, others are pending)
> 
> Note that most platforms are clear about the hardware letting the output
> value be set before the pin direction is changed, but the s3c241x docs
> are vague on that topic ... so those chips might not avoid the glitches.
> 
> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

Thanks, Dave.

Haavard

  parent reply	other threads:[~2007-03-02  9:26 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-03-02  2:25 David Brownell
2007-03-02  5:48 ` Andrew Victor
2007-03-02 18:45   ` David Brownell
2007-03-02  9:26 ` Haavard Skinnemoen [this message]
2007-03-02  7:20 Milan Svoboda

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