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From: Chris Ball <cjb@laptop.org>
To: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>,
	linux-mmc@vger.kernel.org, devicetree-discuss@lists.ozlabs.org,
	linux-samsung-soc@vger.kernel.org, grant.likely@secretlab.ca,
	rob.herring@calxeda.com, patches@linaro.org
Subject: Re: [PATCH] mmc: dt: Add 'broken-cd' DT binding
Date: Tue, 21 Aug 2012 07:56:15 -0400	[thread overview]
Message-ID: <87k3ws5uhs.fsf@octavius.laptop.org> (raw)
In-Reply-To: <CAJuYYwSv+dum8RP9xy+AZCH9pTU0peDpwjt7TA5zn3MFsG1uWA@mail.gmail.com> (Thomas Abraham's message of "Tue, 21 Aug 2012 16:44:49 +0530")

Hi,

On Tue, Aug 21 2012, Thomas Abraham wrote:
> I am trying to have a way to represent a gpio line as card detect line
> that is not connected to the card-detect pad of the mmc controller but
> instead used as a gpio interrupt line or polled gpio line.
>
> 'broken-cd' would imply that the card-detect pad of the mmc controller
> is not connected to the card-detect pin at the slot. The 'cd-gpios'
> property in that case would let the driver code to use the 'cd-gpios'
> line as the external gpio interrupt or poll it.

How about this?

broken-cd: No CD available, use polling.

cd-gpios: The CD pin on the host is working and brought out to a GPIO.

external-cd-gpios: The CD pin on the host is broken, but there's an
                   independent external GPIO available.


(Each host should only have one of these properties.)
                   
Thanks,

- Chris.
-- 
Chris Ball   <cjb@laptop.org>   <http://printf.net/>
One Laptop Per Child

  reply	other threads:[~2012-08-21 11:56 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-21 11:09 [PATCH] mmc: dt: Add 'broken-cd' DT binding Thomas Abraham
2012-08-21 11:01 ` Arnd Bergmann
2012-08-21 11:14   ` Chris Ball
2012-08-21 11:14   ` Thomas Abraham
2012-08-21 11:56     ` Chris Ball [this message]
2012-08-21 12:08       ` Arnd Bergmann
2012-08-21 14:21         ` Rob Herring
2012-08-21 14:48         ` Chris Ball
2012-08-21 15:03           ` Rob Herring
2012-08-21 15:18             ` Chris Ball
2012-08-21 16:01               ` Rob Herring
2012-08-21 17:33                 ` Thomas Abraham
     [not found]                   ` <CAJuYYwR+oCQUcgoy6ZuHp0XAa+EAj9d-FvLtwsQcP3muFMrKLA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-08-21 18:32                     ` Mitch Bradley
2012-08-22  5:51                   ` Shawn Guo
2012-08-22 10:17                     ` Chris Ball
2012-08-22 10:51                       ` Thomas Abraham
2012-08-22 11:08                         ` Chris Ball
2012-08-22 12:04                           ` Thomas Abraham
2012-08-22 14:54                             ` Chris Ball
2012-08-22 14:59                               ` Thomas Abraham
2012-08-22 18:05                               ` [PATCH] mmc: dt: Add card-detection properties to core binding Chris Ball
2012-08-24  5:44                                 ` Shawn Guo
     [not found]                             ` <CAJuYYwQLUs5qb8NqtPf3=ytNHJ_VdnN8Z4yWwyk2+OTftdWFXw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-08-22 17:09                               ` [PATCH] mmc: dt: Add 'broken-cd' DT binding Mitch Bradley
2012-08-23  6:59                                 ` Thomas Abraham
2012-08-22 14:54                       ` Stephen Warren
2012-08-22 14:58                         ` Chris Ball
2012-08-21 15:21             ` Thomas Abraham
2012-08-22  6:00           ` Shawn Guo
2012-08-22 12:26           ` Shawn Guo
2012-08-22 13:54             ` Chris Ball
2012-08-21 12:30       ` Thomas Abraham
2012-08-21 11:09 ` Thomas Abraham

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