FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/interrupt-controller/samsung,exynos4210-combiner.txt

     * Samsung Exynos Interrupt Combiner Controller
     
     Samsung's Exynos4 architecture includes a interrupt combiner controller which
     can combine interrupt sources as a group and provide a single interrupt request
     for the group. The interrupt request from each group are connected to a parent
     interrupt controller, such as GIC in case of Exynos4210.
     
     The interrupt combiner controller consists of multiple combiners. Up to eight
     interrupt sources can be connected to a combiner. The combiner outputs one
    combined interrupt for its eight interrupt sources. The combined interrupt
    is usually connected to a parent interrupt controller.
    
    A single node in the device tree is used to describe the interrupt combiner
    controller module (which includes multiple combiners). A combiner in the
    interrupt controller module shares config/control registers with other
    combiners. For example, a 32-bit interrupt enable/disable config register
    can accommodate up to 4 interrupt combiners (with each combiner supporting
    up to 8 interrupt sources).
    
    Required properties:
    - compatible: should be "samsung,exynos4210-combiner".
    - interrupt-controller: Identifies the node as an interrupt controller.
    - #interrupt-cells: should be <2>. The meaning of the cells are
            * First Cell: Combiner Group Number.
            * Second Cell: Interrupt number within the group.
    - reg: Base address and size of interrupt combiner registers.
    - interrupts: The list of interrupts generated by the combiners which are then
        connected to a parent interrupt controller. The format of the interrupt
        specifier depends in the interrupt parent controller.
    
    Optional properties:
    - samsung,combiner-nr: The number of interrupt combiners supported. If this
      property is not specified, the default number of combiners is assumed
      to be 16.
    
    
    Example:
    
            The following is a an example from the Exynos4210 SoC dtsi file.
    
            combiner:interrupt-controller@10440000 {
                    compatible = "samsung,exynos4210-combiner";
                    interrupt-controller;
                    #interrupt-cells = <2>;
                    reg = <0x10440000 0x1000>;
                    interrupts = <0 0 0>, <0 1 0>, <0 2 0>, <0 3 0>,
                                 <0 4 0>, <0 5 0>, <0 6 0>, <0 7 0>,
                                 <0 8 0>, <0 9 0>, <0 10 0>, <0 11 0>,
                                 <0 12 0>, <0 13 0>, <0 14 0>, <0 15 0>;
            };

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