From: Bill Gatliff <bgat@billgatliff.com>
To: David Brownell <david-b@pacbell.net>
Cc: Paul Mundt <lethal@linux-sh.org>,
Linux Kernel list <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>,
Andrew Victor <andrew@sanpeople.com>,
Haavard Skinnemoen <hskinnemoen@atmel.com>,
jamey.hicks@hp.com, Kevin Hilman <khilman@mvista.com>,
Nicolas Pitre <nico@cam.org>, Russell King <rmk@arm.linux.org.uk>,
Tony Lindgren <tony@atomide.com>
Subject: Re: [patch/rfc 2.6.19-rc5] arch-neutral GPIO calls
Date: Mon, 20 Nov 2006 21:44:14 -0600 [thread overview]
Message-ID: <4562760E.3000906@billgatliff.com> (raw)
In-Reply-To: <200611201349.29999.david-b@pacbell.net>
David Brownell wrote:
>A fine example of two platform-specific notions. First, that GPIO signals
>are muxed in that way ... they could easily have dedicated pins!! Second,
>that there's even a one-to-one association between pins and GPIOs ... I'll
>repeat the previous example of OMAP1, where certain GPIOs could come out on
>any of several pins. And where some pins can be muxed to work with more
>than one GPIO (but only one at a time, of course). Clearly, neither pin
>refcounting nor GPIO claiming can be sufficient to prevent such problems ...
>
>
So, you're saying that if GPIOA1 can come out on pins ZZ1 and BB6, then
there would be two unique "GPIO numbers", one for each possibility?
b.g.
--
Bill Gatliff
bgat@billgatliff.com
next prev parent reply other threads:[~2006-11-21 3:44 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-11 23:41 [patch/rfc 2.6.19-rc5] arch-neutral GPIO calls David Brownell
2006-11-12 1:27 ` H. Peter Anvin
2006-11-12 3:04 ` David Brownell
2006-11-12 3:15 ` H. Peter Anvin
2006-11-13 3:30 ` Bill Gatliff
2006-11-13 17:38 ` Paul Mundt
2006-11-13 17:56 ` Thiago Galesi
2006-11-13 19:25 ` David Brownell
2006-11-13 19:50 ` Bill Gatliff
2006-11-13 18:19 ` Bill Gatliff
2006-11-13 18:38 ` Paul Mundt
2006-11-13 19:29 ` Bill Gatliff
2006-11-13 20:15 ` Paul Mundt
2006-11-20 21:49 ` David Brownell
2006-11-21 3:44 ` Bill Gatliff [this message]
2006-11-21 4:45 ` David Brownell
2006-11-21 5:09 ` Bill Gatliff
2006-11-21 5:35 ` David Brownell
2006-11-21 6:09 ` Paul Mundt
2006-11-21 18:13 ` David Brownell
2006-11-22 3:36 ` Bill Gatliff
2006-11-22 3:55 ` Paul Mundt
2006-11-22 4:45 ` [Bulk] " David Brownell
2006-11-22 4:47 ` Bill Gatliff
2006-11-21 15:57 ` Bill Gatliff
2006-11-23 0:40 ` David Brownell
2006-11-30 6:57 ` pHilipp Zabel
2006-11-30 7:29 ` pHilipp Zabel
2006-11-30 22:24 ` David Brownell
2006-11-20 22:15 ` David Brownell
2006-11-21 2:56 ` Bill Gatliff
2006-11-13 20:00 ` David Brownell
2006-11-13 21:30 ` Paul Mundt
2006-11-14 3:21 ` David Brownell
2006-11-13 19:21 ` David Brownell
2006-11-13 19:43 ` Bill Gatliff
2006-11-13 20:15 ` David Brownell
2006-11-13 20:26 ` Bill Gatliff
2006-11-13 20:53 ` David Brownell
2006-11-13 20:58 ` Bill Gatliff
2006-11-13 20:29 ` Bill Gatliff
2006-11-16 14:54 ` [RFC/PATCH] arch-neutral GPIO calls: AVR32 implementation Haavard Skinnemoen
2006-11-20 21:47 ` David Brownell
2006-11-21 3:11 ` Bill Gatliff
2006-11-21 5:06 ` David Brownell
2006-11-21 5:51 ` Bill Gatliff
2006-11-21 18:19 ` David Brownell
2006-11-21 9:11 ` Haavard Skinnemoen
2006-11-21 19:03 ` David Brownell
2006-11-28 12:36 ` [RFC/PATCH] arch-neutral GPIO calls: AVR32 implementation [take 2] Haavard Skinnemoen
2006-11-30 19:05 ` David Brownell
2006-12-01 9:51 ` Haavard Skinnemoen
2006-12-20 21:04 ` [patch 2.6.20-rc1 0/6] arch-neutral GPIO calls David Brownell
2006-12-20 21:08 ` [patch 2.6.20-rc1 1/6] GPIO core David Brownell
2006-12-27 17:49 ` Pavel Machek
2006-12-28 22:05 ` David Brownell
2006-12-29 0:27 ` Pavel Machek
2006-12-30 1:18 ` David Brownell
2007-01-01 20:55 ` Pavel Machek
2007-01-01 21:27 ` David Brownell
2007-01-02 14:18 ` Pavel Machek
2006-12-20 21:09 ` [patch 2.6.20-rc1 2/6] OMAP GPIO wrappers David Brownell
2006-12-20 21:11 ` [patch 2.6.20-rc1 3/6] AT91 " David Brownell
2006-12-21 6:10 ` Andrew Morton
2006-12-21 6:45 ` David Brownell
2006-12-20 21:12 ` [patch 2.6.20-rc1 4/6] PXA " David Brownell
2006-12-21 6:12 ` Andrew Morton
2006-12-21 6:44 ` David Brownell
2006-12-21 14:27 ` Nicolas Pitre
2006-12-21 15:03 ` pHilipp Zabel
2006-12-21 17:25 ` Nicolas Pitre
2006-12-21 19:32 ` pHilipp Zabel
2006-12-21 20:10 ` Nicolas Pitre
2006-12-21 20:32 ` Bill Gatliff
2006-12-22 6:53 ` pHilipp Zabel
2006-12-28 20:47 ` David Brownell
2006-12-30 2:15 ` Nicolas Pitre
2006-12-30 2:38 ` David Brownell
2007-01-01 19:43 ` David Brownell
2006-12-30 1:13 ` David Brownell
2006-12-21 19:25 ` David Brownell
2006-12-27 17:53 ` Pavel Machek
2006-12-28 20:48 ` David Brownell
2006-12-28 20:50 ` Pavel Machek
2006-12-28 20:53 ` Pavel Machek
2006-12-20 21:13 ` [patch 2.6.20-rc1 5/6] SA1100 " David Brownell
2006-12-21 6:13 ` Andrew Morton
2006-12-22 7:16 ` pHilipp Zabel
2006-12-22 15:05 ` Nicolas Pitre
2006-12-30 2:21 ` David Brownell
2006-12-30 3:15 ` Nicolas Pitre
2006-12-30 6:01 ` David Brownell
2006-12-30 13:59 ` pHilipp Zabel
2006-12-30 15:08 ` Russell King
2006-12-23 11:37 ` Russell King
2006-12-23 20:39 ` David Brownell
2006-12-27 18:24 ` Pavel Machek
2006-12-20 21:14 ` [patch 2.6.20-rc1 6/6] S3C2410 " David Brownell
2006-12-21 10:33 ` Arnaud Patard
2006-12-21 15:29 ` pHilipp Zabel
2006-12-23 11:40 ` Russell King
2006-12-20 23:30 ` [patch 2.6.20-rc1 0/6] arch-neutral GPIO calls Håvard Skinnemoen
2006-12-20 23:46 ` David Brownell
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