Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754359Ab3JXJiW (ORCPT ); Thu, 24 Oct 2013 05:38:22 -0400 Received: from smtp.codeaurora.org ([198.145.11.231]:35439 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751610Ab3JXJiU convert rfc822-to-8bit (ORCPT ); Thu, 24 Oct 2013 05:38:20 -0400 Subject: Re: [RFC PATCH 1/6] DRIVERS: IRQCHIP: IRQ-GIC: Add support for routable irqs Mime-Version: 1.0 (Apple Message framework v1283) Content-Type: text/plain; charset=us-ascii From: Kumar Gala In-Reply-To: <1380549564-31045-2-git-send-email-r.sricharan@ti.com> Date: Thu, 24 Oct 2013 04:38:23 -0500 Cc: , , , , , , , , , , , , , , Content-Transfer-Encoding: 8BIT Message-Id: References: <1380549564-31045-1-git-send-email-r.sricharan@ti.com> <1380549564-31045-2-git-send-email-r.sricharan@ti.com> To: Sricharan R X-Mailer: Apple Mail (2.1283) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2677 Lines: 63 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 > Example: > > intc: interrupt-controller@fff11000 { - k -- Employee of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- 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/