From: Wolfram Sang <w.sang@pengutronix.de>
To: Alexander Stein <alexander.stein@systec-electronic.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>,
Eric Miao <eric.y.miao@gmail.com>,
Peter Tyser <ptyser@xes-inc.com>,
linux-kernel@vger.kernel.org, Alek Du <alek.du@intel.com>,
Samuel Ortiz <sameo@linux.intel.com>,
David Brownell <dbrownell@users.sourceforge.net>,
Uwe Kleine-K?nig <u.kleine-koenig@pengutronix.de>,
Mark Brown <broonie@opensource.wolfsonmicro.com>,
Joe Perches <joe@perches.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Grant Likely <grant.likely@secretlab.ca>
Subject: Re: [PATCH v2 1/4] gpiolib: Add "unknown" direction support
Date: Mon, 21 Feb 2011 10:47:56 +0100 [thread overview]
Message-ID: <20110221094756.GC2616@pengutronix.de> (raw)
In-Reply-To: <201102211037.19572.alexander.stein@systec-electronic.com>
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> We had exported our 5V_enable gpio to sysfs to allow a user-space application
> to enable/disable devices connected to 5V circuit.
> But on the other hand we had to read the current status of this gpio in the
> power-fail interrupt handler to distinguish between false-positive (5V
> disabled) and a correct detection.
What about gpio_export() (description in Documentation/gpio.txt)?
Regards,
Wolfram
--
Pengutronix e.K. | Wolfram Sang |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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next prev parent reply other threads:[~2011-02-21 9:48 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-17 0:56 [PATCH v2 1/4] gpiolib: Add "unknown" direction support Peter Tyser
2011-02-17 0:56 ` [PATCH v2 2/4] gpiolib: Add ability to get GPIO pin direction Peter Tyser
2011-02-17 11:00 ` Wolfram Sang
2011-02-17 0:56 ` [PATCH v2 3/4] gpio: pca953x: Implement get_direction() hook Peter Tyser
2011-02-17 0:56 ` [PATCH v2 4/4] gpio: Add support for Intel ICHx/3100/Series[56] GPIO Peter Tyser
2011-02-17 7:33 ` [PATCH v2 1/4] gpiolib: Add "unknown" direction support Eric Miao
2011-02-17 11:05 ` Uwe Kleine-König
2011-02-17 12:03 ` Lars-Peter Clausen
2011-02-17 12:21 ` Alexander Stein
2011-02-17 13:06 ` Lars-Peter Clausen
2011-02-21 9:09 ` Alexander Stein
2011-02-21 9:19 ` Wolfram Sang
2011-02-21 9:37 ` Alexander Stein
2011-02-21 9:47 ` Wolfram Sang [this message]
2011-02-21 11:07 ` Alexander Stein
2011-02-21 11:22 ` Wolfram Sang
2011-02-21 11:38 ` Alexander Stein
2011-02-21 20:25 ` Ryan Mallon
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