From: David Gibson <david@gibson.dropbear.id.au>
To: Mitch Bradley <wmb@firmworks.com>
Cc: devicetree-discuss list <devicetree-discuss@ozlabs.org>,
linuxppc-dev list <linuxppc-dev@ozlabs.org>
Subject: Re: GPIO - marking individual pins (not) available in device tree
Date: Fri, 24 Oct 2008 14:27:39 +1100 [thread overview]
Message-ID: <20081024032739.GD4267@yookeroo.seuss> (raw)
In-Reply-To: <4900F90B.80703@firmworks.com>
On Thu, Oct 23, 2008 at 12:22:03PM -1000, Mitch Bradley wrote:
> You could have the gpio node define an "address space" where each
> "address" is a GPIO pin number.
>
> The node would have one address cell and one size cell, and the
Not necessarily. If you were to have such an address space, the only
sane way of encoding it would be using the same "gpio descriptor"
format as is used in 'gpios' properties. Which would mean the gpio
controller would in this situation have #address-cells == #gpio-cells.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
WARNING: multiple messages have this Message-ID (diff)
From: David Gibson <david-xT8FGy+AXnRB3Ne2BGzF6laj5H9X9Tb+@public.gmane.org>
To: Mitch Bradley <wmb-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
Cc: devicetree-discuss list
<devicetree-discuss-mnsaURCQ41sdnm+yROfE0A@public.gmane.org>,
linuxppc-dev list
<linuxppc-dev-mnsaURCQ41sdnm+yROfE0A@public.gmane.org>
Subject: Re: GPIO - marking individual pins (not) available in device tree
Date: Fri, 24 Oct 2008 14:27:39 +1100 [thread overview]
Message-ID: <20081024032739.GD4267@yookeroo.seuss> (raw)
In-Reply-To: <4900F90B.80703-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
On Thu, Oct 23, 2008 at 12:22:03PM -1000, Mitch Bradley wrote:
> You could have the gpio node define an "address space" where each
> "address" is a GPIO pin number.
>
> The node would have one address cell and one size cell, and the
Not necessarily. If you were to have such an address space, the only
sane way of encoding it would be using the same "gpio descriptor"
format as is used in 'gpios' properties. Which would mean the gpio
controller would in this situation have #address-cells == #gpio-cells.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
next prev parent reply other threads:[~2008-10-24 3:27 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-23 21:32 GPIO - marking individual pins (not) available in device tree Matt Sealey
2008-10-23 21:32 ` Matt Sealey
2008-10-23 22:22 ` Mitch Bradley
2008-10-23 23:05 ` Matt Sealey
2008-10-24 0:52 ` Mitch Bradley
2008-10-24 3:29 ` David Gibson
2008-10-24 3:29 ` David Gibson
2008-10-24 4:17 ` Mitch Bradley
2008-10-24 4:17 ` Mitch Bradley
2008-10-24 4:45 ` David Gibson
2008-10-24 4:45 ` David Gibson
2008-10-24 22:14 ` Matt Sealey
2008-10-26 23:47 ` David Gibson
2008-10-27 15:40 ` Matt Sealey
2008-10-27 18:34 ` Anton Vorontsov
2008-10-27 18:56 ` Matt Sealey
2008-10-27 20:10 ` Anton Vorontsov
2008-10-27 20:10 ` Anton Vorontsov
2008-10-27 21:56 ` Matt Sealey
2008-10-27 21:56 ` Matt Sealey
2008-10-27 23:12 ` Anton Vorontsov
2008-10-27 23:12 ` Anton Vorontsov
2008-10-27 23:40 ` Anton Vorontsov
2008-10-28 0:47 ` Matt Sealey
2008-10-28 1:11 ` Matt Sealey
2008-10-28 1:11 ` Matt Sealey
2008-10-28 2:37 ` Anton Vorontsov
2008-10-28 16:53 ` Matt Sealey
2008-10-28 16:53 ` Matt Sealey
2008-10-28 17:39 ` Grant Likely
2008-10-28 19:46 ` Matt Sealey
2008-10-28 19:46 ` Matt Sealey
2008-10-28 0:15 ` David Gibson
2008-10-28 0:15 ` David Gibson
2008-10-28 0:51 ` Matt Sealey
2008-10-28 1:50 ` David Gibson
2008-10-28 5:20 ` Grant Likely
2008-10-28 5:20 ` Grant Likely
2008-10-24 22:03 ` Matt Sealey
2008-10-24 22:20 ` Stephen Neuendorffer
2008-10-24 22:20 ` Stephen Neuendorffer
2008-10-26 21:39 ` Matt Sealey
2008-10-24 23:44 ` Mitch Bradley
2008-10-26 21:13 ` Matt Sealey
2008-10-26 21:13 ` Matt Sealey
2008-10-26 23:53 ` David Gibson
2008-10-27 16:12 ` Matt Sealey
2008-10-27 16:12 ` Matt Sealey
2008-10-27 16:35 ` Scott Wood
2008-10-27 16:35 ` Scott Wood
2008-10-27 17:05 ` Matt Sealey
2008-10-27 17:25 ` Scott Wood
2008-10-27 17:49 ` Matt Sealey
2008-10-27 17:54 ` Scott Wood
2008-10-28 0:38 ` David Gibson
2008-10-28 0:38 ` David Gibson
2008-10-28 0:34 ` David Gibson
2008-10-28 0:34 ` David Gibson
2008-10-24 4:58 ` David Gibson
2008-10-24 3:27 ` David Gibson [this message]
2008-10-24 3:27 ` David Gibson
2008-10-24 16:41 ` Anton Vorontsov
2008-10-24 17:01 ` Anton Vorontsov
2008-10-24 22:17 ` Matt Sealey
2008-10-24 22:17 ` Matt Sealey
2008-10-24 22:37 ` Anton Vorontsov
-- strict thread matches above, loose matches on Subject: below --
2008-10-28 13:31 Konstantinos Margaritis
2008-10-28 14:11 ` Anton Vorontsov
2008-10-28 14:11 ` Anton Vorontsov
2008-10-28 14:15 ` Grant Likely
2008-10-28 14:15 ` Grant Likely
2008-10-28 17:06 ` Matt Sealey
2008-10-28 17:06 ` Matt Sealey
2008-10-28 17:32 ` Grant Likely
2008-10-28 23:37 ` David Gibson
2008-10-28 23:37 ` David Gibson
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