Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753693Ab1DRISo (ORCPT ); Mon, 18 Apr 2011 04:18:44 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:35246 "EHLO www.etchedpixels.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753597Ab1DRISj (ORCPT ); Mon, 18 Apr 2011 04:18:39 -0400 Date: Mon, 18 Apr 2011 09:19:02 +0100 From: Alan Cox To: Ben Nizette Cc: Linus Walleij , Grant Likely , , , Lee Jones , Linus Walleij Subject: Re: [PATCH 1/2] gpio: add pin biasing and drive mode to gpiolib Message-ID: <20110418091902.13345132@lxorguk.ukuu.org.uk> In-Reply-To: <3F5641E3-C443-4541-9FDA-24D215597C1F@niasdigital.com> References: <1303076273-8093-1-git-send-email-linus.walleij@stericsson.com> <3F5641E3-C443-4541-9FDA-24D215597C1F@niasdigital.com> X-Mailer: Claws Mail 3.7.8 (GTK+ 2.22.0; x86_64-redhat-linux-gnu) Face: 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 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 806 Lines: 18 > gpiolib handles input and output, high and low because that's all that could reasonably be expected to a) always work and b) be changed at run time in the driver. Imagine if file systems only handled 8.3 filenames because that's all that could reasonably be expected to a) always work ! > So in short - what's the use case? Which driver requires this? > Also your comment re simply in or out on or off is incorrect. Pins may also be in use by firmware and the like and in a 'neither' state. Something certain gpio people seem to be in denial over. Alan -- 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/