1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef __WATCHDOG_PRETIMEOUT_H |
3 | #define __WATCHDOG_PRETIMEOUT_H |
4 | |
5 | #define WATCHDOG_GOV_NAME_MAXLEN 20 |
6 | |
7 | struct watchdog_device; |
8 | |
9 | struct watchdog_governor { |
10 | const char name[WATCHDOG_GOV_NAME_MAXLEN]; |
11 | void (*pretimeout)(struct watchdog_device *wdd); |
12 | }; |
13 | |
14 | #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_GOV) |
15 | /* Interfaces to watchdog pretimeout governors */ |
16 | int watchdog_register_governor(struct watchdog_governor *gov); |
17 | void watchdog_unregister_governor(struct watchdog_governor *gov); |
18 | |
19 | /* Interfaces to watchdog_dev.c */ |
20 | int watchdog_register_pretimeout(struct watchdog_device *wdd); |
21 | void watchdog_unregister_pretimeout(struct watchdog_device *wdd); |
22 | int watchdog_pretimeout_available_governors_get(char *buf); |
23 | int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, char *buf); |
24 | int watchdog_pretimeout_governor_set(struct watchdog_device *wdd, |
25 | const char *buf); |
26 | |
27 | #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP) |
28 | #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "noop" |
29 | #elif IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC) |
30 | #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "panic" |
31 | #endif |
32 | |
33 | #else |
34 | static inline int watchdog_register_pretimeout(struct watchdog_device *wdd) |
35 | { |
36 | return 0; |
37 | } |
38 | |
39 | static inline void watchdog_unregister_pretimeout(struct watchdog_device *wdd) |
40 | { |
41 | } |
42 | |
43 | static inline int watchdog_pretimeout_available_governors_get(char *buf) |
44 | { |
45 | return -EINVAL; |
46 | } |
47 | |
48 | static inline int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, |
49 | char *buf) |
50 | { |
51 | return -EINVAL; |
52 | } |
53 | |
54 | static inline int watchdog_pretimeout_governor_set(struct watchdog_device *wdd, |
55 | const char *buf) |
56 | { |
57 | return -EINVAL; |
58 | } |
59 | #endif |
60 | |
61 | #endif |
62 | |