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