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| author | Guenter Roeck <linux@roeck-us.net> | 2016-02-28 22:12:18 +0100 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2016-03-16 21:11:19 +0100 |
| commit | 15013ad813f6544be8e79afc23672745950d59bc (patch) | |
| tree | 8cb6da1a21407a0a30d8430fb10a6993863c371b /Documentation/watchdog | |
| parent | watchdog: Make stop function optional (diff) | |
| download | linux-15013ad813f6544be8e79afc23672745950d59bc.tar.xz linux-15013ad813f6544be8e79afc23672745950d59bc.zip | |
watchdog: Add support for minimum time between heartbeats
Some watchdogs require a minimum time between heartbeats.
Examples are the watchdogs in DA9062 and AT91SAM9x.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'Documentation/watchdog')
| -rw-r--r-- | Documentation/watchdog/watchdog-kernel-api.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/watchdog/watchdog-kernel-api.txt b/Documentation/watchdog/watchdog-kernel-api.txt index 9eabca1d9355..917eeeabfa5e 100644 --- a/Documentation/watchdog/watchdog-kernel-api.txt +++ b/Documentation/watchdog/watchdog-kernel-api.txt @@ -52,6 +52,7 @@ struct watchdog_device { unsigned int timeout; unsigned int min_timeout; unsigned int max_timeout; + unsigned int min_hw_heartbeat_ms; unsigned int max_hw_heartbeat_ms; struct notifier_block reboot_nb; struct notifier_block restart_nb; @@ -81,6 +82,8 @@ It contains following fields: * max_timeout: the watchdog timer's maximum timeout value (in seconds), as seen from userspace. If set, the maximum configurable value for 'timeout'. Not used if max_hw_heartbeat_ms is non-zero. +* min_hw_heartbeat_ms: Minimum time between heartbeats sent to the chip, + in milli-seconds. * max_hw_heartbeat_ms: Maximum hardware heartbeat, in milli-seconds. If set, the infrastructure will send heartbeats to the watchdog driver if 'timeout' is larger than max_hw_heartbeat_ms, unless WDOG_ACTIVE |