Add devicetree source files as of Linux-3.15-rc2

This adds the Linux dts files to barebox. The dts files are
generated from Ian Campbells device-tree-rebasing.git:

git://xenbits.xen.org/people/ianc/device-tree-rebasing.git

The dts are found in dts/ in the barebox repository and
will be updated from upstream regularly, probably for each upstream
-rc.

To keep the synchronization with upstream easy no changes to
the original files are allowed under dts/. Instead changes to
upstream dts files will be done using overlays in arch/$ARCH/dts/.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 25 insertions, 0 deletions

diff --git a/dts/Bindings/gpio/gpio_atmel.txt b/dts/Bindings/gpio/gpio_atmel.txt
new file mode 100644
index 0000000000..85f8c0d084
--- /dev/null
+++ b/dts/Bindings/gpio/gpio_atmel.txt
@@ -0,0 +1,25 @@
+* 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>;
+	};
+