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[PATCHv5,3/4] devicetree: Document generic watchdog properties

Message ID 1428671199-5562-4-git-send-email-timo.kokkonen@offcode.fi (mailing list archive)
State New, archived
Headers show

Commit Message

Timo Kokkonen April 10, 2015, 1:06 p.m. UTC 
There is no documentation for the watchdog properties that are common
among most of the watchdog drivers. Add document where these generic
properties can be described and told how they should be used in
drivers.

Signed-off-by: Timo Kokkonen <timo.kokkonen@offcode.fi>
---
 .../devicetree/bindings/watchdog/watchdog.txt        | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/watchdog.txt
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Patch

diff --git a/Documentation/devicetree/bindings/watchdog/watchdog.txt b/Documentation/devicetree/bindings/watchdog/watchdog.txt
new file mode 100644
index 0000000..3781406
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/watchdog.txt
@@ -0,0 +1,20 @@ 
+These properties are common among most watchdog drivers. Any driver
+that requires the functionality listed below should implement them
+using these definitions.
+
+Optional properties:
+- timeout-sec: Contains the watchdog timeout in seconds.
+- early-timeout-sec: If present, specify the timeout in seconds for
+  how long it can take for the watchdog daemon to take over the
+  watchdog device. If driver supports this property it must ensure the
+  watchdog hardware is running during this period and a watchdog reset
+  must occur if user space fails to open the device in time. If left
+  zero, the driver only needs to guarantee the watchdog is not
+  stopped or is started during driver init.
+
+Example:
+
+watchdog {
+	 timeout-sec = <60>;
+	 early-timeout-sec = <120>;
+};