Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754767Ab1DTMVy (ORCPT ); Wed, 20 Apr 2011 08:21:54 -0400 Received: from mail-ww0-f44.google.com ([74.125.82.44]:34749 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752292Ab1DTMVx (ORCPT ); Wed, 20 Apr 2011 08:21:53 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; b=TtD4DqDbv34qrHa9ivigg0yPaiW4qxZJMuQb4cY0hj92tu6SSdHua66622WvcpsG88 9hj0UsZd7/yEnuSntvkI/tEbYrcyjSOD2+pqY6+LJJKLA6KmGFtCx0BN0iussmXMW3ut zftdkcCvTge0/DHVGUo3LxBG/woll1tK4kcJg= MIME-Version: 1.0 In-Reply-To: <6C3F739A-A157-4796-9572-C6B0FAC2565E@niasdigital.com> References: <1303076273-8093-1-git-send-email-linus.walleij@stericsson.com> <3F5641E3-C443-4541-9FDA-24D215597C1F@niasdigital.com> <20110418091902.13345132@lxorguk.ukuu.org.uk> <92FFDB9F-37F1-4618-A53D-FEF4151A4953@niasdigital.com> <20110418132629.12d9a106@lxorguk.ukuu.org.uk> <6C3F739A-A157-4796-9572-C6B0FAC2565E@niasdigital.com> Date: Wed, 20 Apr 2011 14:21:51 +0200 X-Google-Sender-Auth: kmvzOD0PgNs4lXmHjcJFd_cuXBg Message-ID: Subject: Re: [PATCH 1/2] gpio: add pin biasing and drive mode to gpiolib From: Linus Walleij To: Ben Nizette Cc: Alan Cox , linux-kernel@vger.kernel.org, Grant Likely , Lee Jones , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 709 Lines: 19 2011/4/19 Ben Nizette : > On 18/04/2011, at 10:26 PM, Alan Cox wrote: > >> The logical extension to that is to delete the gpio layer because the >> board code can do it ? > > Well anything that is done once at startup, yes, This patch is about biasing and drive modes. We need to alter these at runtime (from board code, indeed) due to the fact that when you go to sleep e.g. floating a pin yeilds better power characteristics. Linus Walleij -- 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/