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 <tglx@xxxxxxxxxxxxx>
> Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
> Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
> Cc: Russell King <linux@xxxxxxxxxxxxxxxx>
> Cc: Tony Lindgren <tony@xxxxxxxxxxx>
> Cc: Rajendra Nayak <rnayak@xxxxxx>
> Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
> Cc: Grant Likely <grant.likely@xxxxxxxxxx>
> Cc: Rob Herring <rob.herring@xxxxxxxxxxx>
> Signed-off-by: Sricharan R <r.sricharan@xxxxxx>
> ---
> 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
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