Documentation/devicetree/bindings/interrupt-controller/atmel,aic.txt

   1 * Advanced Interrupt Controller (AIC)
   2
   3 Required properties:
   4 - compatible: Should be "atmel,<chip>-aic"
   5   <chip> can be "at91rm9200", "sama5d2", "sama5d3" or "sama5d4"
   6 - interrupt-controller: Identifies the node as an interrupt controller.
   7 - interrupt-parent: For single AIC system, it is an empty property.
   8 - #interrupt-cells: The number of cells to define the interrupts. It should be 3.
   9   The first cell is the IRQ number (aka "Peripheral IDentifier" on datasheet).
  10   The second cell is used to specify flags:
  11     bits[3:0] trigger type and level flags:
  12       1 = low-to-high edge triggered.
  13       2 = high-to-low edge triggered.
  14       4 = active high level-sensitive.
  15       8 = active low level-sensitive.
  16       Valid combinations are 1, 2, 3, 4, 8.
  17       Default flag for internal sources should be set to 4 (active high).
  18   The third cell is used to specify the irq priority from 0 (lowest) to 7
  19   (highest).
  20 - reg: Should contain AIC registers location and length
  21 - atmel,external-irqs: u32 array of external irqs.
  22
  23 Examples:
  24         /*
  25          * AIC
  26          */
  27         aic: interrupt-controller@fffff000 {
  28                 compatible = "atmel,at91rm9200-aic";
  29                 interrupt-controller;
  30                 interrupt-parent;
  31                 #interrupt-cells = <3>;
  32                 reg = <0xfffff000 0x200>;
  33         };
  34
  35         /*
  36          * An interrupt generating device that is wired to an AIC.
  37          */
  38         dma: dma-controller@ffffec00 {
  39                 compatible = "atmel,at91sam9g45-dma";
  40                 reg = <0xffffec00 0x200>;
  41                 interrupts = <21 4 5>;
  42         };