From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: [PATCH v3 02/10] pwm: Allow chips to support multiple PWMs. Date: Tue, 6 Mar 2012 15:38:11 +0000 Message-ID: <201203061538.11709.arnd@arndb.de> References: <1329923841-32017-1-git-send-email-thierry.reding@avionic-design.de> <20120223160420.GA9899@avionic-0098.mockup.avionic-design.de> <20120303193249.GA22021@avionic-0098.mockup.avionic-design.de> Mime-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20120303193249.GA22021-RM9K5IK7kjIQXX3q8xo1gnVAuStQJXxyR5q1nwbD4aMs9pC9oP6+/A@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Thierry Reding Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Sascha Hauer , Matthias Kaehlcke , Kurt Van Dijck , Rob Herring , Grant Likely , Colin Cross , Olof Johansson , Richard Purdie , Mark Brown , Mitch Bradley , Mike Frysinger , Eric Miao , Lars-Peter Clausen , Ryan Mallon List-Id: linux-tegra@vger.kernel.org On Saturday 03 March 2012, Thierry Reding wrote: > * Thierry Reding wrote: > > * Arnd Bergmann wrote: > > > On Thursday 23 February 2012, Thierry Reding wrote: > > > > > Is this only used for the device tree functions? If so, I would recommend > > > > > making it less generic and always search for a device node. > > > > > > > > It is currently only used to look up a struct pwm_chip for a given struct > > > > device_node, yes. But I can see other uses for this. For instance this could > > > > be useful if we ever want to provide an alternative way of requesting a PWM > > > > on a per-chip basis. > > > > > > Nah, just keep it simple for now. If we need it later, we can still > > > add something like this back, but for now it's just a source of > > > confusion and possible bugs. > > > > Will do. > > I turns out that this is not as easy to do as I thought. The problem is that > if I remove the pwmchip_find() from the core and move the lookup > functionality into the OF support code I no longer have access to the list of > PWM chips. So I guess it will have to stay in to keep things encapsulated > properly. Well, or you move everything into the one file. If you have the device tree support function in the same file as everything else, you no longer need the additional complexity. Arnd