From: Mark Brown <broonie-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
To: Laxman Dewangan <ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org,
linus.walleij-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org,
rdunlap-/UHa2rfvQTnk1uMJSBkQmQ@public.gmane.org,
linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH V2 2/3] gpio: gpiolib: Support for open drain/collector gpios
Date: Fri, 17 Feb 2012 08:37:01 -0800 [thread overview]
Message-ID: <20120217163659.GD10146@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <1329490582-22107-4-git-send-email-ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
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On Fri, Feb 17, 2012 at 08:26:21PM +0530, Laxman Dewangan wrote:
> Adding support for the open drain gpio on which client
> can specify the open drain property through GPIO flag
> GPIOF_OPEN_DRAIN at the time of gpio request.
> The open drain pins are normally pulled high and it
> cannot be driven to output with value of 1 and so
> when client request for setting the pin to HIGH, the
> gpio will be set to input direction to make pin in tristate
> and hence PULL-UP on pins will make the state to HIGH.
> The open drain pin can be driven to LOW by setting output
> with value of 0.
Reviwed-by: Mark Brown <broonie-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
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next prev parent reply other threads:[~2012-02-17 16:37 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-17 14:56 [PATCH V2 0/3] Open drain/open source support from gpio library Laxman Dewangan
[not found] ` <1329490582-22107-1-git-send-email-ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-02-17 14:56 ` Laxman Dewangan
[not found] ` <1329490582-22107-2-git-send-email-ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-02-17 18:21 ` Linus Walleij
2012-02-27 12:45 ` Laxman Dewangan
2012-02-17 14:56 ` [PATCH V2 1/3] Documentation: gpio: Add details of open-drain/source configuration Laxman Dewangan
2012-02-17 14:56 ` [PATCH V2 2/3] gpio: gpiolib: Support for open drain/collector gpios Laxman Dewangan
[not found] ` <1329490582-22107-4-git-send-email-ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-02-17 16:37 ` Mark Brown [this message]
2012-02-17 14:56 ` [PATCH V2 3/3] gpio: gpiolib: Support for open source/emitter gpios Laxman Dewangan
[not found] ` <1329490582-22107-5-git-send-email-ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-02-17 16:30 ` Mark Brown
2012-03-05 14:50 ` [PATCH V2 0/3] Open drain/open source support from gpio library Grant Likely
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