From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: [PATCH 1/5] capemgr: Beaglebone DT overlay based cape manager Date: Wed, 9 Jan 2013 10:21:23 +0000 Message-ID: <201301091021.24147.arnd@arndb.de> References: <1357584666-17374-1-git-send-email-panto@antoniou-consulting.com> <57EDCDB4-2AC9-4052-BBA6-9F4A5D3C3D8C@antoniou-consulting.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <57EDCDB4-2AC9-4052-BBA6-9F4A5D3C3D8C-wVdstyuyKrO8r51toPun2/C9HSW9iNxf@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: "devicetree-discuss" To: Pantelis Antoniou Cc: linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Lee Jones , Rabin VINCENT , Russell King - ARM Linux , Koen Kooi , Russ Dill , Sascha Hauer , Matt Porter , devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, Rob Herring , Linus Walleij , linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Matt Ranostay , Greg Kroah-Hartman , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Rob Clark , Joel A Fernandes , Guennadi Liakhovetski List-Id: linux-omap@vger.kernel.org On Wednesday 09 January 2013, Pantelis Antoniou wrote: > I've also heard in passing of some boards that just have an area in NAND > where a list of plugged in boards is stored. It can be simplified by > having the bootloader pass a command line argument. > > Other than the different probe method (and possible future hot-plug capability) > I don't see anything different. > > What do you think? Just one comment on the command line option from the boot loader: If the boot loader is already DT aware, it should not need to modify the command line, but instead should just enable or disable the right nodes in the tree to statically configure all the peripherals on the extension board. That of course won't work for hotpluggable devices. Arnd