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watchdog: core: dt: add support for the timeout-sec dt property

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Add support for watchdog drivers to initialize/set the timeout field
of the watchdog_device structure. The timeout field is initialised
either with the module timeout parameter value (if valid) or with the
timeout-sec dt property (if valid). If both are invalid the initial
value is unchanged.

Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Fabio Porcedda
2013-01-08 11:04:10 +01:00
committed by Wim Van Sebroeck
parent e3e83d0001
commit 3048253ed9
4 changed files with 80 additions and 12 deletions
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9
include/linux/watchdog.h
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@@ -118,6 +118,13 @@ static inline void watchdog_set_nowayout(struct watchdog_device *wdd, bool noway
set_bit(WDOG_NO_WAY_OUT, &wdd->status);
}
/* Use the following function to check if a timeout value is invalid */
static inline bool watchdog_timeout_invalid(struct watchdog_device *wdd, unsigned int t)
{
return ((wdd->max_timeout != 0) &&
(t < wdd->min_timeout || t > wdd->max_timeout));
}
/* Use the following functions to manipulate watchdog driver specific data */
static inline void watchdog_set_drvdata(struct watchdog_device *wdd, void *data)
{
@@ -130,6 +137,8 @@ static inline void *watchdog_get_drvdata(struct watchdog_device *wdd)
}
/* drivers/watchdog/watchdog_core.c */
extern int watchdog_init_timeout(struct watchdog_device *wdd,
unsigned int timeout_parm, struct device *dev);
extern int watchdog_register_device(struct watchdog_device *);
extern void watchdog_unregister_device(struct watchdog_device *);