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    Subject[PATCH V5 0/4] DRIVERS: IRQCHIP: Add support for crossbar IP
    Date
    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 interrupts
    are mapped.

    The minimal crossbar driver to track and allocate free GIC lines and configure the
    crossbar is added here, along with the DT bindings.

    V5:
    Addressed a comment from Mark Rutland <mark.rutland@arm.com>,
    updated tags and rebased on 3.13-rc2

    V4:
    Addressed a couple of comments and split the DTS file updates in to
    a separate series.

    V3:
    Addressed few more comments from Thomas Gleixner <tglx@linutronix.de>

    Rebased patches 3,4,5,7 which updates the DTS file on top of below branch
    git://git.kernel.org/pub/scm/linux/kernel/git/bcousson/linux-omap-dt.git
    for_3.13/dts

    Rebased patches 1,2,6 on top of 3.12 mainline
    Updated Commit tags

    V2:
    Addressed Thomas Gleixner <tglx@linutronix.de> comments and
    Kumar Gala <galak@codeaurora.org>

    Split updating the DRA7.dtsi file for adding the routable-irqs

    Previous discussions that led to this is at
    https://lkml.org/lkml/2013/9/18/540

    The V1,V2,V3,V4 post of these patches is at
    [V1] https://lkml.org/lkml/2013/9/30/283
    [V2] http://www.spinics.net/lists/linux-omap/msg99540.html
    [V3] http://www.kernelhub.org/?msg=356470&p=2
    [V4] http://www.spinics.net/lists/linux-doc/msg16726.html

    Sricharan R (4):
    DRIVERS: IRQCHIP: IRQ-GIC: Add support for routable irqs
    DRIVERS: IRQCHIP: CROSSBAR: Add support for Crossbar IP
    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 | 6 +
    .../devicetree/bindings/arm/omap/crossbar.txt | 27 +++
    arch/arm/mach-omap2/Kconfig | 1 +
    arch/arm/mach-omap2/omap-wakeupgen.c | 4 +-
    arch/arm/mach-omap2/omap4-common.c | 2 +
    drivers/irqchip/Kconfig | 8 +
    drivers/irqchip/Makefile | 1 +
    drivers/irqchip/irq-crossbar.c | 208 ++++++++++++++++++++
    drivers/irqchip/irq-gic.c | 81 +++++++-
    include/linux/irqchip/arm-gic.h | 7 +-
    include/linux/irqchip/irq-crossbar.h | 11 ++
    11 files changed, 343 insertions(+), 13 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

    --
    1.7.9.5



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