dt-bindings: watchdog: Add Aspeed watchdog timer bindings

Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
new file mode 100644 (file)
index 0000000..c5e74d7
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
@@ -0,0 +1,16 @@
+Aspeed Watchdog Timer
+
+Required properties:
+ - compatible: must be one of:
+       - "aspeed,ast2400-wdt"
+       - "aspeed,ast2500-wdt"
+
+ - reg: physical base address of the controller and length of memory mapped
+   region
+
+Example:
+
+       wdt1: watchdog@1e785000 {
+               compatible = "aspeed,ast2400-wdt";
+               reg = <0x1e785000 0x1c>;
+       };