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89873a711d
The change adds an option to a user with CONFIG_WATCHDOG_SYSFS and CONFIG_WATCHDOG_PRETIMEOUT_GOV enabled to get information about all registered watchdog pretimeout governors by reading watchdog device attribute named "pretimeout_available_governors". Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
#ifndef __WATCHDOG_PRETIMEOUT_H
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#define __WATCHDOG_PRETIMEOUT_H
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#define WATCHDOG_GOV_NAME_MAXLEN 20
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struct watchdog_device;
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struct watchdog_governor {
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const char name[WATCHDOG_GOV_NAME_MAXLEN];
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void (*pretimeout)(struct watchdog_device *wdd);
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};
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#if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_GOV)
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/* Interfaces to watchdog pretimeout governors */
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int watchdog_register_governor(struct watchdog_governor *gov);
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void watchdog_unregister_governor(struct watchdog_governor *gov);
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/* Interfaces to watchdog_dev.c */
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int watchdog_register_pretimeout(struct watchdog_device *wdd);
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void watchdog_unregister_pretimeout(struct watchdog_device *wdd);
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int watchdog_pretimeout_available_governors_get(char *buf);
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int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, char *buf);
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int watchdog_pretimeout_governor_set(struct watchdog_device *wdd,
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const char *buf);
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#if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP)
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#define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "noop"
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#elif IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC)
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#define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "panic"
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#endif
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#else
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static inline int watchdog_register_pretimeout(struct watchdog_device *wdd)
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{
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return 0;
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}
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static inline void watchdog_unregister_pretimeout(struct watchdog_device *wdd)
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{
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}
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static inline int watchdog_pretimeout_available_governors_get(char *buf)
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{
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return -EINVAL;
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}
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static inline int watchdog_pretimeout_governor_get(struct watchdog_device *wdd,
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char *buf)
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{
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return -EINVAL;
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}
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static inline int watchdog_pretimeout_governor_set(struct watchdog_device *wdd,
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const char *buf)
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{
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return -EINVAL;
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}
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#endif
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#endif
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