[PATCH 1/2] DT: Add documentation for gpio-falcon

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Describe gpio-falcon binding.

Signed-off-by: John Crispin <blogic@xxxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-gpio@xxxxxxxxxxxxxxx
---
 .../devicetree/bindings/gpio/gpio-falcon.txt       |   25 ++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-falcon.txt

diff --git a/Documentation/devicetree/bindings/gpio/gpio-falcon.txt b/Documentation/devicetree/bindings/gpio/gpio-falcon.txt
new file mode 100644
index 0000000..60bc6cd
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-falcon.txt
@@ -0,0 +1,25 @@
+Lantiq Falon SoC GPIO controller bindings
+
+Required properties:
+- compatible:
+  - "lantiq,falcon-gpio" for Falcon SoC controllers
+- #gpio-cells : Should be two.
+  - first cell is the pin number
+  - second cell is used to specify optional parameters (unused)
+- gpio-controller : Marks the device node as a GPIO controller
+- reg : Physical base address and length of the controller's registers
+- interrupt-parent: phandle to the IM device node that the irq is routed via
+- interrupts : Specify the IM interrupt number
+- lantiq,bank : The physical GPIO bank that this block is assiciated with
+
+Example:
+
+	gpio0: gpio@810000 {
+		compatible = "lantiq,falcon-gpio";
+		#gpio-cells = <2>;
+		gpio-controller;
+		reg = <0x810000 0x80>;
+		interrupt-parent = <&icu0>;
+		interrupts = <44>;
+		lantiq,bank = <0>;
+	};
-- 
1.7.10.4

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