From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sricharan R Subject: Re: [RFC PATCH 1/6] DRIVERS: IRQCHIP: IRQ-GIC: Add support for routable irqs Date: Thu, 24 Oct 2013 16:14:16 +0530 Message-ID: <5268FA00.1010902@ti.com> References: <1380549564-31045-1-git-send-email-r.sricharan@ti.com> <1380549564-31045-2-git-send-email-r.sricharan@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-doc-owner@vger.kernel.org To: Kumar Gala 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, marc.zyngier@arm.com, grant.likely@linaro.org, rob.herring@calxeda.com, mark.rutland@arm.com List-Id: devicetree@vger.kernel.org On Thursday 24 October 2013 03:08 PM, Kumar Gala wrote: > On Sep 30, 2013, at 8:59 AM, 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. >> >> Cc: Thomas Gleixner >> Cc: Linus Walleij >> Cc: Santosh Shilimkar >> Cc: Russell King >> Cc: Tony Lindgren >> Cc: Rajendra Nayak >> Cc: Marc Zyngier >> Cc: Grant Likely >> Cc: Rob Herring >> Signed-off-by: Sricharan R >> --- >> Documentation/devicetree/bindings/arm/gic.txt | 5 +++ >> arch/arm/boot/dts/dra7.dtsi | 1 + >> drivers/irqchip/irq-gic.c | 57 +++++++++++++++++++++---- >> include/linux/irqchip/arm-gic.h | 8 +++- >> 4 files changed, 61 insertions(+), 10 deletions(-) >> >> diff --git a/Documentation/devicetree/bindings/arm/gic.txt b/Documentation/devicetree/bindings/arm/gic.txt >> index 3dfb0c0..2d8c680 100644 >> --- a/Documentation/devicetree/bindings/arm/gic.txt >> +++ b/Documentation/devicetree/bindings/arm/gic.txt >> @@ -49,6 +49,11 @@ Optional >> regions, used when the GIC doesn't have banked registers. The offset is >> cpu-offset * cpu-nr. >> >> +- routable-irqs : Total number of gic irq inputs which are not directly >> + connected from the peripherals, but are routed dynamically >> + by a crossbar/multiplexer preceding the GIC. The GIC irq >> + input line is assigned dynamically when the corresponding >> + peripheral's crossbar line is mapped. > arm,routable-irqs ok will change here as well. Thanks for reviewing. Regards, Sricharan