Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755594Ab3I3OQM (ORCPT ); Mon, 30 Sep 2013 10:16:12 -0400 Received: from service87.mimecast.com ([91.220.42.44]:49476 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755552Ab3I3OQJ convert rfc822-to-8bit (ORCPT ); Mon, 30 Sep 2013 10:16:09 -0400 Message-ID: <524987A3.4090204@arm.com> Date: Mon, 30 Sep 2013 15:16:03 +0100 From: Marc Zyngier User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130330 Thunderbird/17.0.5 MIME-Version: 1.0 To: Sricharan R CC: "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-doc@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-omap@vger.kernel.org" , "tglx@linutronix.de" , "linus.walleij@linaro.org" , "santosh.shilimkar@ti.com" , "linux@arm.linux.org.uk" , "tony@atomide.com" , "rnayak@ti.com" , "grant.likely@linaro.org" , "rob.herring@calxeda.com" , Mark Rutland Subject: Re: [RFC PATCH 1/6] DRIVERS: IRQCHIP: IRQ-GIC: Add support for routable irqs References: <1380549564-31045-1-git-send-email-r.sricharan@ti.com> <1380549564-31045-2-git-send-email-r.sricharan@ti.com> In-Reply-To: <1380549564-31045-2-git-send-email-r.sricharan@ti.com> X-Enigmail-Version: 1.4.6 X-OriginalArrivalTime: 30 Sep 2013 14:16:04.0338 (UTC) FILETIME=[990FFD20:01CEBDE7] X-MC-Unique: 113093015160603101 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1105 Lines: 25 On 30/09/13 14:59, Sricharan R wrote: > In some socs the gic can be preceded by a crossbar IP which > routes the peripheral interrupts to the gic inputs. The peripheral > interrupts are associated with a fixed crossbar input line and the > crossbar routes that to one of the free gic input line. > > The DT entries for peripherals provides the fixed crossbar input line > as its interrupt number and the mapping code should associate this with > a free gic input line. This patch adds the support inside the gic irqchip > to handle such routable irqs. The routable irqs are registered in a linear > domain. The registered routable domain's callback should be implemented > to get a free irq and to configure the IP to route it. Isn't this just another chained interrupt controller? How is it GIC specific? M. -- Jazz is not dead. It just smells funny... -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/