Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965951Ab3E2MVI (ORCPT ); Wed, 29 May 2013 08:21:08 -0400 Received: from mail-ie0-f175.google.com ([209.85.223.175]:48398 "EHLO mail-ie0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965859Ab3E2MVG (ORCPT ); Wed, 29 May 2013 08:21:06 -0400 MIME-Version: 1.0 In-Reply-To: <20130524115053.GB5203@ab42.lan> References: <20130429161725.GB30136@ab42.lan> <5182B557.4040804@wwwdotorg.org> <20130508164123.GA10248@ab42.lan> <518AAF31.8080502@wwwdotorg.org> <20130510082521.GA2125@ab42.lan> <51942472.9010402@wwwdotorg.org> <20130522142824.GC4789@ab42.lan> <20130524115053.GB5203@ab42.lan> Date: Wed, 29 May 2013 14:21:05 +0200 Message-ID: Subject: Re: [PATCH 1/2] pinmux: Add TB10x pinmux driver From: Linus Walleij To: Christian Ruppert Cc: Haojian Zhuang , Stephen Warren , Shiraz HASHIM , Patrice CHOTARD , "linux-kernel@vger.kernel.org" , Grant Likely , Rob Herring , Rob Landley , Sascha Leuenberger , Pierrick Hascoet , "devicetree-discuss@lists.ozlabs.org" , "linux-doc@vger.kernel.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: 1261 Lines: 29 On Fri, May 24, 2013 at 1:50 PM, Christian Ruppert wrote: > I haven't understood how to associate GPIOs to > other functions, however: Our hardware pin controller makes GPIO pins > available depending on the configuration of the non-GPIO interfaces. > This means that in many configurations, GPIO banks are only partially > available because some pins are used for other purposes. We can't expect > our customers to manually change the pin assignments in the device tree > in order to take this into account for every PCB. But what is it your customers do when customizing a board then? Part of the promise of the device tree is to make it easy for downstream users to customize the kernel, *especially* for different boards/systems using the same SoC, for example. It is very much intended as a customization tools for embedded developers getting boards from a chipset vendor. Maybe I don't understand what is meant by changing the pin assignments above ... Yours, 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/