From: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
To: Jean-Christophe PLAGNIOL-VILLARD
<plagnioj-sclMFOaUSTBWk0Htik3J/w@public.gmane.org>,
Thierry Reding
<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Denis Carikli <denis-fO0SIAKYzcbQT0dZR+AlfA@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Ian Campbell
<ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>,
Eric B??nard <eric-fO0SIAKYzcbQT0dZR+AlfA@public.gmane.org>,
Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>,
Jingoo Han <jg1.han-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>,
Richard Purdie <rpurdie-Fm38FmjxZ/leoWH0uzbU5w@public.gmane.org>,
Laurent Pinchart
<laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>,
Sascha Hauer <kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Lothar Wa??mann
<LW-bxm8fMRDkQLDiMYJYoSAnRvVK+yQ3ZXh@public.gmane.org>
Subject: Re: [PATCHv4] video: backlight: gpio-backlight: Add DT support.
Date: Wed, 23 Oct 2013 17:49:06 +0100 [thread overview]
Message-ID: <5267FE02.6000001@wwwdotorg.org> (raw)
In-Reply-To: <20131023134236.GE17512-HVbc7XotTAhnXn40ka+A6Q@public.gmane.org>
On 10/23/2013 02:42 PM, Jean-Christophe PLAGNIOL-VILLARD wrote:
...
> For me gpio_get_value can return the value of a an output gpio but this need
> to be checked with LinusW
That's certainly not true for all possible GPIO controllers; there are
at least some that can't read either:
* The value of the physical wire, if the GPIO is configured as an output.
* The value that the GPIO controller is driving as an output.
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WARNING: multiple messages have this Message-ID (diff)
From: swarren@wwwdotorg.org (Stephen Warren)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCHv4] video: backlight: gpio-backlight: Add DT support.
Date: Wed, 23 Oct 2013 17:49:06 +0100 [thread overview]
Message-ID: <5267FE02.6000001@wwwdotorg.org> (raw)
In-Reply-To: <20131023134236.GE17512@ns203013.ovh.net>
On 10/23/2013 02:42 PM, Jean-Christophe PLAGNIOL-VILLARD wrote:
...
> For me gpio_get_value can return the value of a an output gpio but this need
> to be checked with LinusW
That's certainly not true for all possible GPIO controllers; there are
at least some that can't read either:
* The value of the physical wire, if the GPIO is configured as an output.
* The value that the GPIO controller is driving as an output.
next prev parent reply other threads:[~2013-10-23 16:49 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-18 15:04 [PATCH 01/11] of: add vendor prefix for Eukréa Electromatique Denis Carikli
2013-10-18 15:04 ` Denis Carikli
2013-10-18 15:04 ` [PATCH 02/11] video: imxfb: Introduce regulator support Denis Carikli
2013-10-18 15:04 ` Denis Carikli
2013-10-19 10:45 ` Jean-Christophe PLAGNIOL-VILLARD
2013-10-19 10:45 ` Jean-Christophe PLAGNIOL-VILLARD
[not found] ` <20131019104555.GI18477-HVbc7XotTAhnXn40ka+A6Q@public.gmane.org>
2013-10-21 9:13 ` [PATCHv4] video: backlight: gpio-backlight: Add DT support Denis Carikli
2013-10-21 9:13 ` Denis Carikli
[not found] ` <1382346813-8449-1-git-send-email-denis-fO0SIAKYzcbQT0dZR+AlfA@public.gmane.org>
2013-10-21 22:48 ` Laurent Pinchart
2013-10-21 22:48 ` Laurent Pinchart
2013-10-22 5:11 ` Jean-Christophe PLAGNIOL-VILLARD
2013-10-22 5:11 ` Jean-Christophe PLAGNIOL-VILLARD
2013-10-22 4:58 ` Jean-Christophe PLAGNIOL-VILLARD
2013-10-22 4:58 ` Jean-Christophe PLAGNIOL-VILLARD
[not found] ` <20131022045833.GB17512-HVbc7XotTAhnXn40ka+A6Q@public.gmane.org>
2013-10-22 7:23 ` Thierry Reding
2013-10-22 7:23 ` Thierry Reding
2013-10-22 15:34 ` Jean-Christophe PLAGNIOL-VILLARD
2013-10-22 15:34 ` Jean-Christophe PLAGNIOL-VILLARD
[not found] ` <20131022153445.GD17512-HVbc7XotTAhnXn40ka+A6Q@public.gmane.org>
2013-10-22 20:01 ` Thierry Reding
2013-10-22 20:01 ` Thierry Reding
2013-10-23 13:42 ` Jean-Christophe PLAGNIOL-VILLARD
2013-10-23 13:42 ` Jean-Christophe PLAGNIOL-VILLARD
[not found] ` <20131023134236.GE17512-HVbc7XotTAhnXn40ka+A6Q@public.gmane.org>
2013-10-23 16:49 ` Stephen Warren [this message]
2013-10-23 16:49 ` Stephen Warren
[not found] ` <5267FE02.6000001-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-10-23 20:08 ` Thierry Reding
2013-10-23 20:08 ` Thierry Reding
2013-10-23 16:51 ` Stephen Warren
2013-10-23 16:51 ` Stephen Warren
[not found] ` <5267FE81.3070201-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-10-23 20:20 ` Thierry Reding
2013-10-23 20:20 ` Thierry Reding
2013-10-23 22:38 ` Laurent Pinchart
2013-10-23 22:38 ` Laurent Pinchart
2013-10-24 11:05 ` Thierry Reding
2013-10-24 11:05 ` Thierry Reding
[not found] ` <20131024110524.GB11296-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2013-10-25 13:57 ` Laurent Pinchart
2013-10-25 13:57 ` Laurent Pinchart
2013-10-31 23:44 ` Jingoo Han
2013-10-31 23:44 ` Jingoo Han
[not found] ` <003701ced693$2f856150$8e9023f0$%han-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2013-11-01 9:57 ` Thierry Reding
2013-11-01 9:57 ` Thierry Reding
[not found] ` <20131101095754.GJ27864-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2013-11-04 0:20 ` Jingoo Han
2013-11-04 0:20 ` Jingoo Han
2013-10-31 23:37 ` Jingoo Han
2013-10-31 23:37 ` Jingoo Han
[not found] ` <001e01ced692$267a6d90$736f48b0$%han-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2013-11-01 10:13 ` Thierry Reding
2013-11-01 10:13 ` Thierry Reding
[not found] ` <20131101101346.GK27864-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2013-11-06 0:08 ` Laurent Pinchart
2013-11-06 0:08 ` Laurent Pinchart
2013-10-25 20:10 ` Grant Likely
2013-10-25 20:10 ` Grant Likely
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