From mboxrd@z Thu Jan  1 00:00:00 1970
From: LW@KARO-electronics.de (=?utf-8?Q?Lothar_Wa=C3=9Fmann?=)
Date: Wed, 22 May 2013 09:02:56 +0200
Subject: [PATCH] ARM: iomux-mx51: Always define PU
 E for pins used as GPIO
In-Reply-To: <1369203552.559574351@f389.i.mail.ru>
References: <1369124845-19244-1-git-send-email-shc_work@mail.ru>
 <20130521192430.GU32299@pengutronix.de>
 <1369203552.559574351@f389.i.mail.ru>
Message-ID: <20892.28064.82907.942799@ipc1.ka-ro>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hi,

Alexander Shiyan writes:
> > On Tue, May 21, 2013 at 12:27:25PM +0400, Alexander Shiyan wrote:
> > > This patch adds a PUE bit for pins which used as GPIO. This allow
> > > to use the GPIOs correctly as inputs when source is open-drain with
> > > external pullup resistor (IRQ open-drain outputs for example).
> > 
> > I don't understand. If there's an external pullup why do you want to
> > turn on the internal one?
> 
> It is just switch off keeper circuit.
> 
If you want to switch the keeper circuit off why don't you do that by
removing PAD_CTL_PKE rather than adding PAD_CTL_PUE?


Lothar Wa?mann
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