From: Rob Herring <robherring2@gmail.com>
To: Sricharan R <r.sricharan@ti.com>
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,
mark.rutland@arm.com
Subject: Re: [RFC PATCH 0/6] DRIVERS: IRQCHIP: Add support for crossbar IP
Date: Mon, 30 Sep 2013 10:09:53 -0500 [thread overview]
Message-ID: <52499441.1030403@gmail.com> (raw)
In-Reply-To: <1380549564-31045-1-git-send-email-r.sricharan@ti.com>
On 09/30/2013 08:59 AM, Sricharan R wrote:
> Some socs have a large number of interrupts requests to service
> the needs of its many peripherals and subsystems. All of the interrupt
> requests lines from the subsystems are not needed at the same
> time, so they have to be muxed to the controllers appropriately.
> In such places a interrupt controllers are preceded by an
> IRQ CROSSBAR that provides flexibility in muxing the device interrupt
> requests to the controller inputs.
>
> This series models the peripheral interrupts that can be routed through
> the crossbar to the GIC as 'routable-irqs'. The routable irqs are added
> in a separate linear domain inside the GIC. The registered routable domain's
> callback are invoked as a part of the GIC's callback, which in turn should
> allocate a free irq line and configure the IP accordingly. So every peripheral
> in the dts files mentions the fixed crossbar number as its interrupt. A free
> gic line for that gets allocated and configured when the peripheral's interrupt
> is mapped.
>
> The minimal crossbar driver to track and allocate free GIC lines and configure the
> crossbar is added here, along with the DT bindings.
Seems like interrupt-map property is what you need here.
http://devicetree.org/Device_Tree_Usage#Advanced_Interrupt_Mapping
Versatile Express also has an example.
Rob
>
> Sricharan R (6):
> DRIVERS: IRQCHIP: IRQ-GIC: Add support for routable irqs
> DRIVERS: IRQCHIP: CROSSBAR: Add support for Crossbar IP
> ARM: DTS: DRA: Add crossbar device binding
> ARM: DTS: DRA: Replace peripheral interrupt numbers with crossbar
> inputs.
> ARM: OMAP4+: Correct Wakeup-gen code to use physical irq number
> ARM: DRA: Enable Crossbar IP support for DRA7XX
>
> Documentation/devicetree/bindings/arm/gic.txt | 5 +
> .../devicetree/bindings/arm/omap/crossbar.txt | 27 +++
> arch/arm/boot/dts/dra7.dtsi | 98 +++++-----
> arch/arm/mach-omap2/Kconfig | 1 +
> arch/arm/mach-omap2/omap-wakeupgen.c | 4 +-
> arch/arm/mach-omap2/omap4-common.c | 4 +
> drivers/irqchip/Kconfig | 8 +
> drivers/irqchip/Makefile | 1 +
> drivers/irqchip/irq-crossbar.c | 195 ++++++++++++++++++++
> drivers/irqchip/irq-gic.c | 57 +++++-
> include/linux/irqchip/arm-gic.h | 8 +-
> include/linux/irqchip/irq-crossbar.h | 11 ++
> 12 files changed, 363 insertions(+), 56 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/arm/omap/crossbar.txt
> create mode 100644 drivers/irqchip/irq-crossbar.c
> create mode 100644 include/linux/irqchip/irq-crossbar.h
>
next prev parent reply other threads:[~2013-09-30 15:09 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-30 13:59 [RFC PATCH 0/6] DRIVERS: IRQCHIP: Add support for crossbar IP Sricharan R
2013-09-30 13:59 ` [RFC PATCH 1/6] DRIVERS: IRQCHIP: IRQ-GIC: Add support for routable irqs Sricharan R
2013-09-30 14:16 ` Marc Zyngier
2013-09-30 14:22 ` Santosh Shilimkar
2013-09-30 14:28 ` Marc Zyngier
[not found] ` <5249890B.7020906-l0cyMroinI0@public.gmane.org>
2013-09-30 15:00 ` Sricharan R
2013-10-08 11:23 ` Linus Walleij
2013-10-24 9:12 ` Thomas Gleixner
2013-10-24 10:21 ` Sricharan R
2013-10-24 9:38 ` Kumar Gala
2013-10-24 10:44 ` Sricharan R
2013-09-30 13:59 ` [RFC PATCH 2/6] DRIVERS: IRQCHIP: CROSSBAR: Add support for Crossbar IP Sricharan R
2013-10-24 9:20 ` Thomas Gleixner
2013-10-24 10:21 ` Sricharan R
2013-10-24 9:33 ` Kumar Gala
2013-10-24 10:43 ` Sricharan R
2013-10-24 11:00 ` Kumar Gala
2013-09-30 13:59 ` [RFC PATCH 3/6] ARM: DTS: DRA: Add crossbar device binding Sricharan R
[not found] ` <1380549564-31045-1-git-send-email-r.sricharan-l0cyMroinI0@public.gmane.org>
2013-09-30 13:59 ` [RFC PATCH 4/6] ARM: DTS: DRA: Replace peripheral interrupt numbers with crossbar inputs Sricharan R
2013-09-30 14:19 ` [RFC PATCH 0/6] DRIVERS: IRQCHIP: Add support for crossbar IP Santosh Shilimkar
2013-09-30 13:59 ` [RFC PATCH 5/6] ARM: OMAP4+: Correct Wakeup-gen code to use physical irq number Sricharan R
2013-09-30 13:59 ` [RFC PATCH 6/6] ARM: DRA: Enable Crossbar IP support for DRA7XX Sricharan R
2013-09-30 15:09 ` Rob Herring [this message]
2013-10-01 11:13 ` [RFC PATCH 0/6] DRIVERS: IRQCHIP: Add support for crossbar IP Sricharan R
2013-10-01 13:48 ` Rob Herring
[not found] ` <524AD290.207-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-10-01 13:57 ` Santosh Shilimkar
2013-10-01 14:53 ` Rob Herring
2013-10-01 15:07 ` Santosh Shilimkar
2013-10-15 7:35 ` Sricharan R
2013-10-24 8:57 ` Thomas Gleixner
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