From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grant Likely Subject: Re: [PATCH 2/2] x86: of: define irq functions to allow drivers/of/* to build on x86 Date: Fri, 10 Sep 2010 12:21:35 -0600 Message-ID: <20100910182135.GG11284@angua.secretlab.ca> References: <20100910060151.6613e9c3@debxo> <20100910172538.GC11284@angua.secretlab.ca> <20100910181458.GA7243@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20100910181458.GA7243-X9Un+BFzKDI@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org To: Ingo Molnar Cc: Andres Salomon , devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Mitch Bradley , mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org, tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org List-Id: devicetree@vger.kernel.org On Fri, Sep 10, 2010 at 08:14:58PM +0200, Ingo Molnar wrote: > > * Grant Likely wrote: > > > On Fri, Sep 10, 2010 at 06:01:51AM -0700, Andres Salomon wrote: > > > > > > - Define a stub irq_create_of_mapping for x86 as a stop-gap solution until > > > drivers/of/irq is further along. > > > - Define irq_dispose_mapping for x86 to appease of_i2c.c > > > > > > Signed-off-by: Andres Salomon > > > > Applied to my test-devicetree branch. I'll need an ack from the x86 > > maintainers before I put it into my -next branch. > > The purpose of the patch is not clear to me. What does it do and why? It allows CONFIG_OF to be enabled on x86 without a build failure. > The changelog says it's a stopgap measure - what exactly is the long > term plan and how long will it take? It is a stop gap because it performs a trivial direct map of an IRQ number in the device tree data structure to a Linux irq number. This works for a single IRQ controller, but falls apart when cascaded controller are described in the device tree. The long term plan is to have the drivers/of/ code handling the mapping intelligently like powerpc currently does. g.