[PATCH v3 05/16] watchdog: lantiq: add device tree binding documentation

[Hauke Mehrtens <hauke@xxxxxxxxxx>]

The binding was not documented before, add the documentation now.

Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
 .../devicetree/bindings/watchdog/lantiq-wdt.txt    | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/lantiq-wdt.txt

diff --git a/Documentation/devicetree/bindings/watchdog/lantiq-wdt.txt b/Documentation/devicetree/bindings/watchdog/lantiq-wdt.txt
new file mode 100644
index 000000000000..675c30e23b65
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/lantiq-wdt.txt
@@ -0,0 +1,28 @@
+Lantiq WTD watchdog binding
+============================
+
+This describes the binding of the Lantiq watchdog driver.
+
+-------------------------------------------------------------------------------
+Required properties:
+- compatible		: Should be one of
+				"lantiq,wdt"
+				"lantiq,wdt-xrx100"
+				"lantiq,wdt-falcon"
+
+Optional properties:
+- regmap		: A phandle to the RCU syscon
+- offset-status		: Offset of the reset cause register
+- mask-status		: Mask of the reset cause register value
+
+
+-------------------------------------------------------------------------------
+Example for the watchdog on the xRX200 SoCs:
+		watchdog@803F0 {
+			compatible = "lantiq,wdt-xrx200", "lantiq,wdt-xrx100";
+			reg = <0x803F0 0x10>;
+
+			regmap = <&rcu0>;
+			offset-status = <0x14>;
+			mask-status = <0x80000000>;
+		};
-- 
2.11.0

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