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drivers/timers/watchdog: add watchdog timer notifier chain

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Add support for watchdog timer notifer chain so that users
can customize the callback function when the watchdog timer
times out which enabled by Auto-monitor

Signed-off-by: yaojiaqi <yaojiaqi@lixiang.com>
This commit is contained in:
yaojiaqi 2024-12-30 14:59:33 +08:00 • committed by Xiang Xiao
parent aa0aecbd80
commit 43797ea6cc
3 changed files with 146 additions and 0 deletions
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71
include/nuttx/timers/watchdog.h
View file

@ -31,6 +31,7 @@
#include <nuttx/compiler.h>
#include <nuttx/irq.h>
#include <nuttx/fs/ioctl.h>
#include <nuttx/notifier.h>
#ifdef CONFIG_WATCHDOG
@ -88,6 +89,35 @@
#define WDFLAGS_CAPTURE (1 << 2) /* 1=Call the user function when the
* watchdog timer expires */
/* Keepalive Actions ********************************************************/
/* According to the keepalive action specified by the Auto-monitor, callback
* functions registered on the watchdog notifier chain may take corresponding
* actions.
*
* These are detected and handled by the "upper half" watchdog timer driver.
*
* WATCHDOG_KEEPALIVE_BY_ONESHOT - The watchdog timer is keepalive by
* oneshot timer.
* WATCHDOG_KEEPALIVE_BY_TIMER - The watchdog timer is keepalive by
* timer.
* WATCHDOG_KEEPALIVE_BY_WDOG - The watchdog timer is keepalive by
* wdog.
* WATCHDOG_KEEPALIVE_BY_WORKER - The watchdog timer is keepalive by
* worker queue.
* WATCHDOG_KEEPALIVE_BY_CAPTURE - The watchdog timer is keepalive by
* capture.
* WATCHDOG_KEEPALIVE_BY_IDLE - The watchdog timer is keepalive by
* idle task.
*/
#define WATCHDOG_KEEPALIVE_BY_ONESHOT 0
#define WATCHDOG_KEEPALIVE_BY_TIMER 1
#define WATCHDOG_KEEPALIVE_BY_WDOG 2
#define WATCHDOG_KEEPALIVE_BY_WORKER 3
#define WATCHDOG_KEEPALIVE_BY_CAPTURE 4
#define WATCHDOG_KEEPALIVE_BY_IDLE 5
/****************************************************************************
* Public Types
****************************************************************************/
@ -197,6 +227,47 @@ extern "C"
#define EXTERN extern
#endif
#ifdef CONFIG_WATCHDOG_TIMEOUT_NOTIFIER
/****************************************************************************
* Name: watchdog_notifier_chain_register
*
* Description:
* Add notifier to the watchdog notifier chain
*
* Input Parameters:
* nb - New entry in notifier chain
*
****************************************************************************/
void watchdog_notifier_chain_register(FAR struct notifier_block *nb);
/****************************************************************************
* Name: watchdog_notifier_chain_unregister
*
* Description:
* Remove notifier from the watchdog notifier chain
*
* Input Parameters:
* nb - Entry to remove from notifier chain
*
****************************************************************************/
void watchdog_notifier_chain_unregister(FAR struct notifier_block *nb);
/****************************************************************************
* Name: watchdog_automonitor_timeout
*
* Description:
* This function can be called in the watchdog timeout interrupt handler.
* If so, callbacks on the watchdog timer notify chain are called when the
* watchdog timer times out.
*
****************************************************************************/
void watchdog_automonitor_timeout(void);
#endif /* CONFIG_WATCHDOG_TIMEOUT_NOTIFIER */
/****************************************************************************
* Name: watchdog_register
*