/* SPDX-License-Identifier: GPL-2.0 */

  #ifndef __WATCHDOG_PRETIMEOUT_H
  #define __WATCHDOG_PRETIMEOUT_H
  
  #define WATCHDOG_GOV_NAME_MAXLEN	20
  
  struct watchdog_device;
  
  struct watchdog_governor {
  	const char	name[WATCHDOG_GOV_NAME_MAXLEN];
  	void		(*pretimeout)(struct watchdog_device *wdd);
  };
  
  #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_GOV)
  /* Interfaces to watchdog pretimeout governors */
  int watchdog_register_governor(struct watchdog_governor *gov);
  void watchdog_unregister_governor(struct watchdog_governor *gov);
  
  /* Interfaces to watchdog_dev.c */
  int watchdog_register_pretimeout(struct watchdog_device *wdd);
  void watchdog_unregister_pretimeout(struct watchdog_device *wdd);

  int watchdog_pretimeout_available_governors_get(char *buf);

  int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, char *buf);

  int watchdog_pretimeout_governor_set(struct watchdog_device *wdd,
  				     const char *buf);

  #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP)
  #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV		"noop"

  #elif IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC)
  #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV		"panic"

  #endif

  #else
  static inline int watchdog_register_pretimeout(struct watchdog_device *wdd)
  {
  	return 0;
  }
  
  static inline void watchdog_unregister_pretimeout(struct watchdog_device *wdd)
  {
  }

  static inline int watchdog_pretimeout_available_governors_get(char *buf)
  {
  	return -EINVAL;
  }

  static inline int watchdog_pretimeout_governor_get(struct watchdog_device *wdd,
  						   char *buf)
  {
  	return -EINVAL;
  }

  
  static inline int watchdog_pretimeout_governor_set(struct watchdog_device *wdd,
  						   const char *buf)
  {
  	return -EINVAL;
  }

  #endif
  
  #endif