Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262040AbVBPPYY (ORCPT ); Wed, 16 Feb 2005 10:24:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262043AbVBPPYX (ORCPT ); Wed, 16 Feb 2005 10:24:23 -0500 Received: from port-83-236-181-26.static.qsc.de ([83.236.181.26]:1688 "EHLO metis.extern.pengutronix.de") by vger.kernel.org with ESMTP id S262040AbVBPPYV (ORCPT ); Wed, 16 Feb 2005 10:24:21 -0500 Date: Wed, 16 Feb 2005 16:24:17 +0100 From: Robert Schwebel To: krishna Cc: Linux Kernel Subject: Re: What is the purpose of GPIO pins. Message-ID: <20050216152417.GF1722@pengutronix.de> References: <4211E434.7060405@globaledgesoft.com> <4211E9A4.6010908@globaledgesoft.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <4211E9A4.6010908@globaledgesoft.com> User-Agent: Mutt/1.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 934 Lines: 21 On Tue, Feb 15, 2005 at 05:53:00PM +0530, krishna wrote: > NO, Sorry I wasn't clear. > I am asking about GPIO controllers used in HandHeld Devices. Embedded CPUs usually have general purpose I/O pins for all kind of stuff; you can just use them as inputs (for example for reading keyboards), outputs (e.g. setting LEDs) or use them as interrupt sources with various properties (level, edge, ...). Robert -- Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry Handelsregister: Amtsgericht Hildesheim, HRA 2686 Hannoversche Str. 2, 31134 Hildesheim, Germany Phone: +49-5121-206917-0 | Fax: +49-5121-206917-9 - 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/