watchdog: digicolor: document device tree binding

[sfrench/cifs-2.6.git] / Documentation / devicetree / bindings / watchdog / digicolor-wdt.txt

diff --git a/Documentation/devicetree/bindings/watchdog/digicolor-wdt.txt b/Documentation/devicetree/bindings/watchdog/digicolor-wdt.txt
new file mode 100644 (file)
index 0000000..a882967
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/digicolor-wdt.txt
@@ -0,0 +1,25 @@
+Conexant Digicolor SoCs Watchdog timer
+
+The watchdog functionality in Conexant Digicolor SoCs relies on the so called
+"Agent Communication" block. This block includes the eight programmable system
+timer counters. The first timer (called "Timer A") is the only one that can be
+used as watchdog.
+
+Required properties:
+
+- compatible : Should be "cnxt,cx92755-wdt"
+- reg : Specifies base physical address and size of the registers
+- clocks : phandle; specifies the clock that drives the timer
+
+Optional properties:
+
+- timeout-sec : Contains the watchdog timeout in seconds
+
+Example:
+
+       watchdog@f0000fc0 {
+               compatible = "cnxt,cx92755-wdt";
+               reg = <0xf0000fc0 0x8>;
+               clocks = <&main_clk>;
+               timeout-sec = <15>;
+       };