diff options
Diffstat (limited to 'Documentation/watchdog')
| -rw-r--r-- | Documentation/watchdog/watchdog-kernel-api.txt | 7 | ||||
| -rw-r--r-- | Documentation/watchdog/watchdog-parameters.txt | 3 |
2 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/watchdog/watchdog-kernel-api.txt b/Documentation/watchdog/watchdog-kernel-api.txt index a0438f395..d8b0d3367 100644 --- a/Documentation/watchdog/watchdog-kernel-api.txt +++ b/Documentation/watchdog/watchdog-kernel-api.txt @@ -36,6 +36,10 @@ The watchdog_unregister_device routine deregisters a registered watchdog timer device. The parameter of this routine is the pointer to the registered watchdog_device structure. +The watchdog subsystem includes an registration deferral mechanism, +which allows you to register an watchdog as early as you wish during +the boot process. + The watchdog device structure looks like this: struct watchdog_device { @@ -52,6 +56,7 @@ struct watchdog_device { void *driver_data; struct mutex lock; unsigned long status; + struct list_head deferred; }; It contains following fields: @@ -80,6 +85,8 @@ It contains following fields: information about the status of the device (Like: is the watchdog timer running/active, is the nowayout bit set, is the device opened via the /dev/watchdog interface or not, ...). +* deferred: entry in wtd_deferred_reg_list which is used to + register early initialized watchdogs. The list of watchdog operations is defined as: diff --git a/Documentation/watchdog/watchdog-parameters.txt b/Documentation/watchdog/watchdog-parameters.txt index 692791cc6..9f9ec9f76 100644 --- a/Documentation/watchdog/watchdog-parameters.txt +++ b/Documentation/watchdog/watchdog-parameters.txt @@ -208,6 +208,9 @@ nowayout: Watchdog cannot be stopped once started ------------------------------------------------- omap_wdt: timer_margin: initial watchdog timeout (in seconds) +early_enable: Watchdog is started on module insertion (default=0 +nowayout: Watchdog cannot be stopped once started + (default=kernel config parameter) ------------------------------------------------- orion_wdt: heartbeat: Initial watchdog heartbeat in seconds |