Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / gpio / gpio_atmel.txt

diff --git a/kernel/Documentation/devicetree/bindings/gpio/gpio_atmel.txt b/kernel/Documentation/devicetree/bindings/gpio/gpio_atmel.txt
new file mode 100644 (file)
index 0000000..85f8c0d
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+++ b/kernel/Documentation/devicetree/bindings/gpio/gpio_atmel.txt
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+* 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>;
+       };
+