| * Atmel GPIO controller (PIO) |
| |
| Required properties: |
| - compatible: "atmel,<chip>-gpio", where <chip> is at91rm9200 or at91sam9x5. |
| - reg: Should contain GPIO controller registers location and length |
| - interrupts: Should be the port interrupt shared by all the pins. |
| - #gpio-cells: Should be two. The first cell is the pin number and |
| the second cell is used to specify optional parameters (currently |
| unused). |
| - gpio-controller: Marks the device node as a GPIO controller. |
| |
| optional properties: |
| - #gpio-lines: Number of gpio if absent 32. |
| |
| |
| Example: |
| pioA: gpio@fffff200 { |
| compatible = "atmel,at91rm9200-gpio"; |
| reg = <0xfffff200 0x100>; |
| interrupts = <2 4>; |
| #gpio-cells = <2>; |
| gpio-controller; |
| #gpio-lines = <19>; |
| }; |
| |
