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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef INCLUDE_WATCHDOG_H
# define INCLUDE_WATCHDOG_H
#include <poller.h>
#include <driver.h>
#include <param.h>
enum wdog_hw_runnning {
WDOG_HW_RUNNING_UNSUPPORTED = PARAM_TRISTATE_UNKNOWN,
WDOG_HW_RUNNING = PARAM_TRISTATE_TRUE,
WDOG_HW_NOT_RUNNING = PARAM_TRISTATE_FALSE
};
struct device_node;
struct watchdog {
int (*set_timeout)(struct watchdog *, unsigned);
const char *name;
struct device_d *hwdev;
struct device_d dev;
unsigned int priority;
unsigned int timeout_max;
unsigned int timeout_cur;
unsigned int poller_timeout_cur;
unsigned int poller_enable;
uint64_t last_ping;
int seconds_to_expire;
struct poller_async poller;
struct list_head list;
int running; /* enum wdog_hw_running */
};
/*
* Use the following function to check whether or not the hardware watchdog
* is running
*/
static inline int watchdog_hw_running(struct watchdog *w)
{
if (w->running == WDOG_HW_RUNNING_UNSUPPORTED)
return -ENOSYS;
return w->running == WDOG_HW_RUNNING;
}
#ifdef CONFIG_WATCHDOG
int watchdog_register(struct watchdog *);
int watchdog_deregister(struct watchdog *);
struct watchdog *watchdog_get_default(void);
struct watchdog *watchdog_get_by_name(const char *name);
int watchdog_get_alias_id_from(struct watchdog *, struct device_node *);
int watchdog_set_timeout(struct watchdog*, unsigned);
int watchdog_inhibit_all(void);
#else
static inline int watchdog_register(struct watchdog *w)
{
return 0;
}
static inline int watchdog_deregister(struct watchdog *w)
{
return 0;
}
static inline struct watchdog *watchdog_get_default(void)
{
return NULL;
}
static inline struct watchdog *watchdog_get_by_name(const char *name)
{
return NULL;
}
static inline int watchdog_set_timeout(struct watchdog*w, unsigned t)
{
return 0;
}
static inline int watchdog_inhibit_all(void)
{
return -ENOSYS;
}
static inline int watchdog_get_alias_id_from(struct watchdog *wd, struct device_node *np)
{
return -ENOSYS;
}
#endif
#define WATCHDOG_DEFAULT_PRIORITY 100
#endif /* INCLUDE_WATCHDOG_H */
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