From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757598Ab1GDOTd (ORCPT ); Mon, 4 Jul 2011 10:19:33 -0400 Received: from gate.eia.be ([194.78.71.18]:11340 "EHLO mail.eia.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753797Ab1GDOTb (ORCPT ); Mon, 4 Jul 2011 10:19:31 -0400 Date: Mon, 4 Jul 2011 16:19:24 +0200 From: Kurt Van Dijck To: Arnd Bergmann Cc: Ryan Mallon , Sascha Hauer , Bill Gatliff , linux-kernel@vger.kernel.org, Ryan Mallon , Shawn Guo , linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 1/3] PWM: add pwm framework support Message-ID: <20110704141924.GF316@e-circ.dyndns.org> Mail-Followup-To: Arnd Bergmann , Ryan Mallon , Sascha Hauer , Bill Gatliff , linux-kernel@vger.kernel.org, Ryan Mallon , Shawn Guo , linux-arm-kernel@lists.infradead.org References: <201106301441.24493.arnd@arndb.de> <4E11994B.7070103@gmail.com> <20110704110523.GB316@e-circ.dyndns.org> <201107041553.07643.arnd@arndb.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <201107041553.07643.arnd@arndb.de> User-Agent: Mutt/1.5.20 (2009-06-14) X-OriginalArrivalTime: 04 Jul 2011 14:19:28.0515 (UTC) FILETIME=[6271AD30:01CC3A55] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jul 04, 2011 at 03:53:07PM +0200, Arnd Bergmann wrote: > On Monday 04 July 2011, Kurt Van Dijck wrote: > > With socketCAN, we encountered a similar problem. Every chip maker > > tries to create added value by means of special options. You can't > > support them all in the framework. Therefore, sysfs can be added > > to configure special things. > > I would expect that pwm is much simpler than CAN, ack > so the amount > of creativity there is also limited. That is true for a single PWM channel. With multiple PWM channels, hardware design tends to be creative in coupling several channels together somehow in order to create some diesel engine control signal ... > > Arnd Anyway, I explained my concern. It's just _an_ opinion. Kurt