watchdog: Introduce hardware maximum heartbeat in watchdog core

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Introduce an optional hardware maximum heartbeat in the watchdog core.
The hardware maximum heartbeat can be lower than the maximum timeout.

Drivers can set the maximum hardware heartbeat value in the watchdog data
structure. If the configured timeout exceeds the maximum hardware heartbeat,
the watchdog core enables a timer function to assist sending keepalive
requests to the watchdog driver.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

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Guenter Roeck 2016-02-28 13:12:15 -08:00 • committed by Wim Van Sebroeck

parent fb32e9b9de

commit 664a39236e

3 changed files with 158 additions and 18 deletions

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19

Documentation/watchdog/watchdog-kernel-api.txt

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129

drivers/watchdog/watchdog_dev.c

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28

include/linux/watchdog.h

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