From mboxrd@z Thu Jan 1 00:00:00 1970 From: Santosh Shilimkar Subject: Re: [RFC PATCH 1/6] DRIVERS: IRQCHIP: IRQ-GIC: Add support for routable irqs Date: Mon, 30 Sep 2013 10:22:03 -0400 Message-ID: <5249890B.7020906@ti.com> 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> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <524987A3.4090204@arm.com> Sender: linux-omap-owner@vger.kernel.org To: Marc Zyngier 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 List-Id: devicetree@vger.kernel.org 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