watchdog: dw: Enable OF support for DW watchdog timer

Add device tree support to the DW watchdog timer.

Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Acked-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Pavel Machek <pavel@denx.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: Viresh Kumar <viresh.linux@gmail.com>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: devicetree@vger.kernel.org
Cc: linux-watchdog@vger.kernel.org

1 files changed, 21 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/watchdog/dw_wdt.txt b/Documentation/devicetree/bindings/watchdog/dw_wdt.txt
new file mode 100644
index 000000000000..08e16f684f2d
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/dw_wdt.txt
@@ -0,0 +1,21 @@
+Synopsys Designware Watchdog Timer
+
+Required Properties:
+
+- compatible    : Should contain "snps,dw-wdt"
+- reg           : Base address and size of the watchdog timer registers.
+- clocks        : phandle + clock-specifier for the clock that drives the
+                watchdog timer.
+
+Optional Properties:
+
+- interrupts    : The interrupt used for the watchdog timeout warning.
+
+Example:
+
+        watchdog0: wd@ffd02000 {
+                compatible = "snps,dw-wdt";
+                reg = <0xffd02000 0x1000>;
+                interrupts = <0 171 4>;
+                clocks = <&per_base_clk>;
+        };