Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755878Ab3I3O2n (ORCPT ); Mon, 30 Sep 2013 10:28:43 -0400 Received: from service87.mimecast.com ([91.220.42.44]:60962 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755851Ab3I3O2k convert rfc822-to-8bit (ORCPT ); Mon, 30 Sep 2013 10:28:40 -0400 Message-ID: <52498A94.7090009@arm.com> Date: Mon, 30 Sep 2013 15:28:36 +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: Santosh Shilimkar CC: Sricharan R , "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" , "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> <524987A3.4090204@arm.com> <5249890B.7020906@ti.com> In-Reply-To: <5249890B.7020906@ti.com> X-Enigmail-Version: 1.4.6 X-OriginalArrivalTime: 30 Sep 2013 14:28:37.0172 (UTC) FILETIME=[59C95740:01CEBDE9] X-MC-Unique: 113093015283800201 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: 1525 Lines: 39 On 30/09/13 15:22, Santosh Shilimkar wrote: > On Monday 30 September 2013 10:16 AM, Marc Zyngier wrote: >> 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? >> > No it isn't a irq controller rather a event router. Patch is missing > reference to the previous discussion. Previous discussion is here [1] > > Regards, > Santosh > > [1] https://lkml.org/lkml/2013/9/13/413 Right. I need to go and understand that bit first. Thanks Santosh. 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/