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-rw-r--r--Documentation/watchdog/watchdog-api.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/watchdog/watchdog-api.txt b/Documentation/watchdog/watchdog-api.txt
index 7dc2c1c6f77..d738ec25eaa 100644
--- a/Documentation/watchdog/watchdog-api.txt
+++ b/Documentation/watchdog/watchdog-api.txt
@@ -134,6 +134,15 @@ There is also a get function for getting the pretimeout:
Not all watchdog drivers will support a pretimeout.
+Get the number of seconds before reboot:
+
+Some watchdog drivers have the ability to report the remaining time
+before the system will reboot. The WDIOC_GETTIMELEFT is the ioctl
+that returns the number of seconds before reboot.
+
+ ioctl(fd, WDIOC_GETTIMELEFT, &timeleft);
+ printf("The timeout was is %d seconds\n", timeleft);
+
Environmental monitoring:
All watchdog drivers are required return more information about the system,