1/* SPDX-License-Identifier: LGPL-2.1+ */
2/* Copyright (C) 2022, Linaro Ltd - Daniel Lezcano <daniel.lezcano@linaro.org> */
3#ifndef __LIBTHERMAL_H
4#define __LIBTHERMAL_H
5
6#include <linux/thermal.h>
7
8#ifndef LIBTHERMAL_API
9#define LIBTHERMAL_API __attribute__((visibility("default")))
10#endif
11
12#ifdef __cplusplus
13extern "C" {
14#endif
15
16struct thermal_sampling_ops {
17	int (*tz_temp)(int tz_id, int temp, void *arg);
18};
19
20struct thermal_events_ops {
21	int (*tz_create)(const char *name, int tz_id, void *arg);
22	int (*tz_delete)(int tz_id, void *arg);
23	int (*tz_enable)(int tz_id, void *arg);
24	int (*tz_disable)(int tz_id, void *arg);
25	int (*trip_high)(int tz_id, int trip_id, int temp, void *arg);
26	int (*trip_low)(int tz_id, int trip_id, int temp, void *arg);
27	int (*trip_add)(int tz_id, int trip_id, int type, int temp, int hyst, void *arg);
28	int (*trip_change)(int tz_id, int trip_id, int type, int temp, int hyst, void *arg);
29	int (*trip_delete)(int tz_id, int trip_id, void *arg);
30	int (*cdev_add)(const char *name, int cdev_id, int max_state, void *arg);
31	int (*cdev_delete)(int cdev_id, void *arg);
32	int (*cdev_update)(int cdev_id, int cur_state, void *arg);
33	int (*gov_change)(int tz_id, const char *gov_name, void *arg);
34};
35
36struct thermal_ops {
37	struct thermal_sampling_ops sampling;
38	struct thermal_events_ops events;
39};
40
41struct thermal_trip {
42	int id;
43	int type;
44	int temp;
45	int hyst;
46};
47
48struct thermal_zone {
49	int id;
50	int temp;
51	char name[THERMAL_NAME_LENGTH];
52	char governor[THERMAL_NAME_LENGTH];
53	struct thermal_trip *trip;
54};
55
56struct thermal_cdev {
57	int id;
58	char name[THERMAL_NAME_LENGTH];
59	int max_state;
60	int min_state;
61	int cur_state;
62};
63
64typedef enum {
65	THERMAL_ERROR = -1,
66	THERMAL_SUCCESS = 0,
67} thermal_error_t;
68
69struct thermal_handler;
70
71typedef int (*cb_tz_t)(struct thermal_zone *, void *);
72
73typedef int (*cb_tt_t)(struct thermal_trip *, void *);
74
75typedef int (*cb_tc_t)(struct thermal_cdev *, void *);
76
77LIBTHERMAL_API int for_each_thermal_zone(struct thermal_zone *tz, cb_tz_t cb, void *arg);
78
79LIBTHERMAL_API int for_each_thermal_trip(struct thermal_trip *tt, cb_tt_t cb, void *arg);
80
81LIBTHERMAL_API int for_each_thermal_cdev(struct thermal_cdev *cdev, cb_tc_t cb, void *arg);
82
83LIBTHERMAL_API struct thermal_zone *thermal_zone_find_by_name(struct thermal_zone *tz,
84							      const char *name);
85
86LIBTHERMAL_API struct thermal_zone *thermal_zone_find_by_id(struct thermal_zone *tz, int id);
87
88LIBTHERMAL_API struct thermal_zone *thermal_zone_discover(struct thermal_handler *th);
89
90LIBTHERMAL_API struct thermal_handler *thermal_init(struct thermal_ops *ops);
91
92LIBTHERMAL_API void thermal_exit(struct thermal_handler *th);
93
94/*
95 * Netlink thermal events
96 */
97LIBTHERMAL_API thermal_error_t thermal_events_exit(struct thermal_handler *th);
98
99LIBTHERMAL_API thermal_error_t thermal_events_init(struct thermal_handler *th);
100
101LIBTHERMAL_API thermal_error_t thermal_events_handle(struct thermal_handler *th, void *arg);
102
103LIBTHERMAL_API int thermal_events_fd(struct thermal_handler *th);
104
105/*
106 * Netlink thermal commands
107 */
108LIBTHERMAL_API thermal_error_t thermal_cmd_exit(struct thermal_handler *th);
109
110LIBTHERMAL_API thermal_error_t thermal_cmd_init(struct thermal_handler *th);
111
112LIBTHERMAL_API thermal_error_t thermal_cmd_get_tz(struct thermal_handler *th,
113						  struct thermal_zone **tz);
114
115LIBTHERMAL_API thermal_error_t thermal_cmd_get_cdev(struct thermal_handler *th,
116						    struct thermal_cdev **tc);
117
118LIBTHERMAL_API thermal_error_t thermal_cmd_get_trip(struct thermal_handler *th,
119						    struct thermal_zone *tz);
120
121LIBTHERMAL_API thermal_error_t thermal_cmd_get_governor(struct thermal_handler *th,
122							struct thermal_zone *tz);
123
124LIBTHERMAL_API thermal_error_t thermal_cmd_get_temp(struct thermal_handler *th,
125						    struct thermal_zone *tz);
126
127/*
128 * Netlink thermal samples
129 */
130LIBTHERMAL_API thermal_error_t thermal_sampling_exit(struct thermal_handler *th);
131
132LIBTHERMAL_API thermal_error_t thermal_sampling_init(struct thermal_handler *th);
133
134LIBTHERMAL_API thermal_error_t thermal_sampling_handle(struct thermal_handler *th, void *arg);
135
136LIBTHERMAL_API int thermal_sampling_fd(struct thermal_handler *th);
137
138#endif /* __LIBTHERMAL_H */
139
140#ifdef __cplusplus
141}
142#endif
143