| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * Atmel GPIO controller (PIO) |
| 2 | |
| 3 | Required properties: |
| 4 | - compatible: "atmel,<chip>-gpio", where <chip> is at91rm9200 or at91sam9x5. |
| 5 | - reg: Should contain GPIO controller registers location and length |
| 6 | - interrupts: Should be the port interrupt shared by all the pins. |
| 7 | - #gpio-cells: Should be two. The first cell is the pin number and |
| 8 | the second cell is used to specify optional parameters to declare if the GPIO |
| 9 | is active high or low. See gpio.txt. |
| 10 | - gpio-controller: Marks the device node as a GPIO controller. |
| 11 | - interrupt-controller: Marks the device node as an interrupt controller. |
| 12 | - #interrupt-cells: Should be two. The first cell is the pin number and the |
| 13 | second cell is used to specify irq type flags, see the two cell description |
| 14 | in interrupt-controller/interrupts.txt for details. |
| 15 | |
| 16 | optional properties: |
| 17 | - #gpio-lines: Number of gpio if absent 32. |
| 18 | |
| 19 | |
| 20 | Example: |
| 21 | pioA: gpio@fffff200 { |
| 22 | compatible = "atmel,at91rm9200-gpio"; |
| 23 | reg = <0xfffff200 0x100>; |
| 24 | interrupts = <2 4>; |
| 25 | #gpio-cells = <2>; |
| 26 | gpio-controller; |
| 27 | #gpio-lines = <19>; |
| 28 | interrupt-controller; |
| 29 | #interrupt-cells = <2>; |
| 30 | }; |
| 31 | |