linux/Documentation/devicetree/bindings/arc/interrupts.txt
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   1* ARC700 incore Interrupt Controller
   2
   3  The core interrupt controller provides 32 prioritised interrupts (2 levels)
   4  to ARC700 core.
   5
   6Properties:
   7
   8- compatible: "snps,arc700-intc"
   9- interrupt-controller: This is an interrupt controller.
  10- #interrupt-cells: Must be <1>.
  11
  12  Single Cell "interrupts" property of a device specifies the IRQ number
  13  between 0 to 31
  14
  15  intc accessed via the special ARC AUX register interface, hence "reg" property
  16  is not specified.
  17
  18Example:
  19
  20        intc: interrupt-controller {
  21                compatible = "snps,arc700-intc";
  22                interrupt-controller;
  23                #interrupt-cells = <1>;
  24        };
  25