| * Advanced Interrupt Controller (AIC) |
| |
| Required properties: |
| - compatible: Should be "atmel,<chip>-aic" |
| - interrupt-controller: Identifies the node as an interrupt controller. |
| - interrupt-parent: For single AIC system, it is an empty property. |
| - #interrupt-cells: The number of cells to define the interrupts. It sould be 2. |
| The first cell is the IRQ number (aka "Peripheral IDentifier" on datasheet). |
| The second cell is used to specify flags: |
| bits[3:0] trigger type and level flags: |
| 1 = low-to-high edge triggered. |
| 2 = high-to-low edge triggered. |
| 4 = active high level-sensitive. |
| 8 = active low level-sensitive. |
| Valid combinations are 1, 2, 3, 4, 8. |
| Default flag for internal sources should be set to 4 (active high). |
| - reg: Should contain AIC registers location and length |
| |
| Examples: |
| /* |
| * AIC |
| */ |
| aic: interrupt-controller@fffff000 { |
| compatible = "atmel,at91rm9200-aic"; |
| interrupt-controller; |
| interrupt-parent; |
| #interrupt-cells = <2>; |
| reg = <0xfffff000 0x200>; |
| }; |
| |
| /* |
| * An interrupt generating device that is wired to an AIC. |
| */ |
| dma: dma-controller@ffffec00 { |
| compatible = "atmel,at91sam9g45-dma"; |
| reg = <0xffffec00 0x200>; |
| interrupts = <21 4>; |
| }; |