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watchdog: Improve description of min_hw_heartbeat_ms 

The description of min_hw_heartbeat_ms is misleading and needs some
improvements.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Guenter Roeck 2016-05-27 14:19:06 -07:00 committed by Wim Van Sebroeck
parent c3c1e29c8a
commit f9f535c1b7
2 changed files with 5 additions and 3 deletions
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5
Documentation/watchdog/watchdog-kernel-api.txt
View File

@ -82,8 +82,9 @@ 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.
* min_hw_heartbeat_ms: Hardware limit for minimum time between heartbeats,
in milli-seconds. This value is normally 0; it should only be provided
if the hardware can not tolerate lower intervals between heartbeats.
* 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

3
include/linux/watchdog.h
View File

@ -66,7 +66,8 @@ struct watchdog_ops {
* as configurable from user space. Only relevant if
* max_hw_heartbeat_ms is not provided.
* @min_hw_heartbeat_ms:
* Minimum time between heartbeats, in milli-seconds.
* Hardware limit for minimum time between heartbeats,
* in milli-seconds.
* @max_hw_heartbeat_ms:
* Hardware limit for maximum timeout, in milli-seconds.
* Replaces max_timeout if specified.