Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030700AbWKUDoN (ORCPT ); Mon, 20 Nov 2006 22:44:13 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030701AbWKUDoN (ORCPT ); Mon, 20 Nov 2006 22:44:13 -0500 Received: from smtp1.mtco.com ([207.179.226.202]:40372 "EHLO smtp1.mtco.com") by vger.kernel.org with ESMTP id S1030700AbWKUDoM (ORCPT ); Mon, 20 Nov 2006 22:44:12 -0500 Message-ID: <4562760E.3000906@billgatliff.com> Date: Mon, 20 Nov 2006 21:44:14 -0600 From: Bill Gatliff User-Agent: Debian Thunderbird 1.0.2 (X11/20060926) X-Accept-Language: en-us, en MIME-Version: 1.0 To: David Brownell CC: Paul Mundt , Linux Kernel list , Andrew Morton , Andrew Victor , Haavard Skinnemoen , jamey.hicks@hp.com, Kevin Hilman , Nicolas Pitre , Russell King , Tony Lindgren Subject: Re: [patch/rfc 2.6.19-rc5] arch-neutral GPIO calls References: <200611111541.34699.david-b@pacbell.net> <4558C794.90602@billgatliff.com> <20061113201535.GA20388@linux-sh.org> <200611201349.29999.david-b@pacbell.net> In-Reply-To: <200611201349.29999.david-b@pacbell.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 993 Lines: 27 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/