From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ralf Baechle Subject: Re: [PATCH v2 1/2] irq: add irq_domain translation infrastructure Date: Tue, 19 Jul 2011 11:34:27 +0100 Message-ID: <20110719103426.GA31394@linux-mips.org> References: <20110718222610.1911.5673.stgit@ponder> <20110718223140.1911.80783.stgit@ponder> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20110718223140.1911.80783.stgit@ponder> 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: Grant Likely Cc: Michal Simek , Benjamin Herrenschmidt , Sebastian Andrzej Siewior , linux-kernel@vger.kernel.org, Andres Salomon , Thomas Gleixner , devicetree-discuss@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org On Mon, Jul 18, 2011 at 04:31:40PM -0600, Grant Likely wrote: > This patch adds irq_domain infrastructure for translating from > hardware irq numbers to linux irqs. This is particularly important > for architectures adding device tree support because the current > implementation (excluding PowerPC and SPARC) cannot handle > translation for more than a single interrupt controller. irq_domain > supports device tree translation for any number of interrupt > controllers. > > This patch converts x86, Microblaze, ARM and MIPS to use irq_domain > for device tree irq translation. x86 is untested beyond compiling it, > irq_domain is enabled for MIPS and Microblaze, but the old behaviour is > preserved until the core code is modified to actually register an > irq_domain yet. On ARM it works and is required for much of the new > ARM device tree board support. > > PowerPC has /not/ been converted to use this new infrastructure. It > is still missing some features before it can replace the virq > infrastructure already in powerpc (see documentation on > irq_domain_map/unmap for details). Followup patches will add the > missing pieces and migrate PowerPC to use irq_domain. > > SPARC has its own method of managing interrupts from the device tree > and is unaffected by this change. I like it - yet another building block of the conversion of MIPS to DT in place. Acked-by: Ralf Baechle Thanks, Ralf