linux-kernel - Re: [PATCH] AMD Geode CS5535/5536 GPIO driver

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Message-ID: <20090206101618.7102e46b@i1501.lan.towertech.it>
Date:	Fri, 6 Feb 2009 10:16:18 +0100
From:	Alessandro Zummo <azummo-lists@...ertech.it>
To:	David Brownell <david-b@...bell.net>
Cc:	jordan@...micpenguin.net, linux-geode@...ts.infradead.org,
	dilinger@...ued.net, dsaxena@...top.org,
	"Martin-Éric Racine" <q-funk@....fi>,
	lkml <linux-kernel@...r.kernel.org>, rpurdie@...ys.net,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] AMD Geode CS5535/5536 GPIO driver

On Thu, 5 Feb 2009 16:12:20 -0800
David Brownell <david-b@...bell.net> wrote:

> Unless this hardware misbehaves when both output and input
> modes are enabled (e.g. in the window between those two calls),
> I'd suggest just not clearing INPUT_ENABLE.  It's legit to
> ask for the *actual* value of an output line, e.g. for when
> it uses open drain mode.  (And didn't this hardware have an
> option for open drain GPIO signaling?)

 seems reasonable,
 I'll let the Geode people decide what to do here... 

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Torino, Italy

  http://www.towertech.it

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