From: Fu Wei <fu.wei@xxxxxxxxxx>
The sbsa-gwdt.txt documentation in devicetree/bindings/watchdog is for
introducing SBSA(Server Base System Architecture) Generic Watchdog
device node info into FDT
Signed-off-by: Fu Wei <fu.wei@xxxxxxxxxx>
---
.../devicetree/bindings/watchdog/sbsa-gwdt.txt | 36 ++++++++++++++++++++++
1 file changed, 36 insertions(+)
create mode 100644 Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt
diff --git a/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt
new file mode 100644
index 0000000..bd1768d
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt
@@ -0,0 +1,36 @@
+* SBSA(Server Base System Architecture) Generic Watchdog
+
+The SBSA Generic Watchdog Timer is used for resetting the system after
+two stages of timeout.
+More details: ARM-DEN-0029 - Server Base System Architecture (SBSA)
+
+Required properties:
+- compatible : Should at least contain "arm,sbsa-gwdt".
+
+- reg : base physical address of the frames and length of memory mapped region.
+
+- reg-names : Should contain the resource reg names to show the order of
+ the values in "reg".
+ Must include the following entries : "refresh", "control".
+
+- interrupts : Should at least contain WS0 interrupt,
+ the WS1 Signal is optional.
+
+- interrupt-names : Should contain the resource interrupt names.
+ Must include the following entries : "ws0". "ws1" is optional.
+
+Optional properties
+- timeout-sec : Watchdog pre-timeout and timeout values (in seconds).
+ The first is timeout values, then pre-timeout.
+
+Example for FVP Foundation Model v8:
+
+watchdog@2a450000 {
+ compatible = "arm,sbsa-gwdt";
+ reg = <0x0 0x2a450000 0 0x10000>,
+ <0x0 0x2a440000 0 0x10000>;
+ reg-names = "refresh", "control";
+ interrupts = <0 27 4>;
+ interrupt-names = "ws0";
+ timeout-sec = <10 5>;
+};
--
1.9.1
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