1* Advanced Interrupt Controller (AIC)
2
3Required properties:
4- compatible: Should be "atmel,<chip>-aic"
5  <chip> can be "at91rm9200", "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
23Examples:
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	};
43