drivers/watchdog/watchdog_pretimeout.h

   1 #ifndef __WATCHDOG_PRETIMEOUT_H
   2 #define __WATCHDOG_PRETIMEOUT_H
   3
   4 #define WATCHDOG_GOV_NAME_MAXLEN        20
   5
   6 struct watchdog_device;
   7
   8 struct watchdog_governor {
   9         const char      name[WATCHDOG_GOV_NAME_MAXLEN];
  10         void            (*pretimeout)(struct watchdog_device *wdd);
  11 };
  12
  13 #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_GOV)
  14 /* Interfaces to watchdog pretimeout governors */
  15 int watchdog_register_governor(struct watchdog_governor *gov);
  16 void watchdog_unregister_governor(struct watchdog_governor *gov);
  17
  18 /* Interfaces to watchdog_dev.c */
  19 int watchdog_register_pretimeout(struct watchdog_device *wdd);
  20 void watchdog_unregister_pretimeout(struct watchdog_device *wdd);
  21 int watchdog_pretimeout_available_governors_get(char *buf);
  22 int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, char *buf);
  23 int watchdog_pretimeout_governor_set(struct watchdog_device *wdd,
  24                                      const char *buf);
  25
  26 #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP)
  27 #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV         "noop"
  28 #elif IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC)
  29 #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV         "panic"
  30 #endif
  31
  32 #else
  33 static inline int watchdog_register_pretimeout(struct watchdog_device *wdd)
  34 {
  35         return 0;
  36 }
  37
  38 static inline void watchdog_unregister_pretimeout(struct watchdog_device *wdd)
  39 {
  40 }
  41
  42 static inline int watchdog_pretimeout_available_governors_get(char *buf)
  43 {
  44         return -EINVAL;
  45 }
  46
  47 static inline int watchdog_pretimeout_governor_get(struct watchdog_device *wdd,
  48                                                    char *buf)
  49 {
  50         return -EINVAL;
  51 }
  52
  53 static inline int watchdog_pretimeout_governor_set(struct watchdog_device *wdd,
  54                                                    const char *buf)
  55 {
  56         return -EINVAL;
  57 }
  58 #endif
  59
  60 #endif