Document: devicetree: add OF documents for arch-mmp

Add OF support in Document/devicetree directory.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 23 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/gpio/mrvl-gpio.txt b/Documentation/devicetree/bindings/gpio/mrvl-gpio.txt
new file mode 100644
index 000000000000..1e34cfe5ebea
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/mrvl-gpio.txt
@@ -0,0 +1,23 @@
+* Marvell PXA GPIO controller
+
+Required properties:
+- compatible : Should be "mrvl,pxa-gpio" or "mrvl,mmp-gpio"
+- reg : Address and length of the register set for the device
+- interrupts : Should be the port interrupt shared by all gpio pins, if
+- interrupt-name : Should be the name of irq resource.
+  one number.
+- gpio-controller : Marks the device node as a gpio controller.
+- #gpio-cells : Should be one.  It is the pin number.
+
+Example:
+
+        gpio: gpio@d4019000 {
+                compatible = "mrvl,mmp-gpio", "mrvl,pxa-gpio";
+                reg = <0xd4019000 0x1000>;
+                interrupts = <49>, <17>, <18>;
+                interrupt-name = "gpio_mux", "gpio0", "gpio1";
+                gpio-controller;
+                #gpio-cells = <1>;
+                interrupt-controller;
+                #interrupt-cells = <1>;
+      };