From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [RFC PATCHv1 1/2] Export SoC info through sysfs Date: Thu, 10 Mar 2011 16:19:18 +0000 Message-ID: <20110310161917.GD27206@opensource.wolfsonmicro.com> References: <1299689961-5028-1-git-send-email-maxime.coquelin-nonst@stericsson.com> <201103101602.19241.arnd@arndb.de> <20110310152011.GH22195@opensource.wolfsonmicro.com> <201103101711.59544.arnd@arndb.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <201103101711.59544.arnd@arndb.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Arnd Bergmann Cc: ext Nishanth Menon , ext Tony Lindgren , Peter De-Schrijver , Ambresh , Saravana Kannan , Jouni Hogander , Lee Jones , Rabin VINCENT , Russell King , Jonas ABERG , ext Kevin Hilman , David Brown , Maxime Coquelin , "linux-arm-msm@vger.kernel.org" , Loic PALLARDY , "eduardo.valentin@nokia.com" , maxime_coquelin@yahoo.fr, Ryan Mallon , Linux-OMAP , linux-arm-kernel@lists.infradead.org, Daniel Walker List-Id: linux-arm-msm@vger.kernel.org On Thu, Mar 10, 2011 at 05:11:59PM +0100, Arnd Bergmann wrote: > On Thursday 10 March 2011, Mark Brown wrote: > > You could, though the bus will just be a noop. Typically it's more than > > one bus but software basically can't tell. > Yes. The main reason for representing such a bus in sysfs would be > to match the SOC's block diagram with the structure in the kernel. If you're doing that things like power domains tend to be a lot more interesting since you can do something meaningful with them in software. The non-visible buses aren't reliably documented anyway and the first procesor datasheet I just pulled up had a whole bunch of devices that span multiple buses anyway :)