| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * Advanced Interrupt Controller (AIC) |
| 2 | |
| 3 | Required properties: |
| 4 | - compatible: Should be: |
| 5 | - "atmel,<chip>-aic" where <chip> can be "at91rm9200", "sama5d2", |
| 6 | "sama5d3" or "sama5d4" |
| 7 | - "microchip,<chip>-aic" where <chip> can be "sam9x60" |
| 8 | |
| 9 | - interrupt-controller: Identifies the node as an interrupt controller. |
| 10 | - #interrupt-cells: The number of cells to define the interrupts. It should be 3. |
| 11 | The first cell is the IRQ number (aka "Peripheral IDentifier" on datasheet). |
| 12 | The second cell is used to specify flags: |
| 13 | bits[3:0] trigger type and level flags: |
| 14 | 1 = low-to-high edge triggered. |
| 15 | 2 = high-to-low edge triggered. |
| 16 | 4 = active high level-sensitive. |
| 17 | 8 = active low level-sensitive. |
| 18 | Valid combinations are 1, 2, 3, 4, 8. |
| 19 | Default flag for internal sources should be set to 4 (active high). |
| 20 | The third cell is used to specify the irq priority from 0 (lowest) to 7 |
| 21 | (highest). |
| 22 | - reg: Should contain AIC registers location and length |
| 23 | - atmel,external-irqs: u32 array of external irqs. |
| 24 | |
| 25 | Examples: |
| 26 | /* |
| 27 | * AIC |
| 28 | */ |
| 29 | aic: interrupt-controller@fffff000 { |
| 30 | compatible = "atmel,at91rm9200-aic"; |
| 31 | interrupt-controller; |
| 32 | #interrupt-cells = <3>; |
| 33 | reg = <0xfffff000 0x200>; |
| 34 | }; |
| 35 | |
| 36 | /* |
| 37 | * An interrupt generating device that is wired to an AIC. |
| 38 | */ |
| 39 | dma: dma-controller@ffffec00 { |
| 40 | compatible = "atmel,at91sam9g45-dma"; |
| 41 | reg = <0xffffec00 0x200>; |
| 42 | interrupts = <21 4 5>; |
| 43 | }; |