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32 lines
1.1 KiB
32 lines
1.1 KiB
* Atmel GPIO controller (PIO)
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Required properties:
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- compatible: "atmel,<chip>-gpio", where <chip> is at91rm9200 or at91sam9x5.
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- reg: Should contain GPIO controller registers location and length
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- interrupts: Should be the port interrupt shared by all the pins.
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- #gpio-cells: Should be two. The first cell is the pin number and
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the second cell is used to specify optional parameters to declare if the GPIO
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is active high or low. See gpio.txt.
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- gpio-controller: Marks the device node as a GPIO controller.
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- interrupt-controller: Marks the device node as an interrupt controller.
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- #interrupt-cells: Should be two. The first cell is the pin number and the
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second cell is used to specify irq type flags, see the two cell description
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in interrupt-controller/interrupts.txt for details.
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optional properties:
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- #gpio-lines: Number of gpio if absent 32.
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Example:
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pioA: gpio@fffff200 {
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compatible = "atmel,at91rm9200-gpio";
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reg = <0xfffff200 0x100>;
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interrupts = <2 4>;
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#gpio-cells = <2>;
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gpio-controller;
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#gpio-lines = <19>;
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interrupt-controller;
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#interrupt-cells = <2>;
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};
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