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1 | /* | |
2 | * thermal_core.h | |
3 | * | |
4 | * Copyright (C) 2012 Intel Corp | |
5 | * Author: Durgadoss R <durgadoss.r@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; version 2 of the License. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License along | |
18 | * with this program; if not, write to the Free Software Foundation, Inc., | |
19 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
20 | * | |
21 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
22 | */ | |
23 | ||
24 | #ifndef __THERMAL_CORE_H__ | |
25 | #define __THERMAL_CORE_H__ | |
26 | ||
27 | #include <linux/device.h> | |
28 | #include <linux/thermal.h> | |
29 | ||
30 | /* Initial state of a cooling device during binding */ | |
31 | #define THERMAL_NO_TARGET -1UL | |
32 | ||
33 | /* | |
34 | * This structure is used to describe the behavior of | |
35 | * a certain cooling device on a certain trip point | |
36 | * in a certain thermal zone | |
37 | */ | |
38 | struct thermal_instance { | |
39 | int id; | |
40 | char name[THERMAL_NAME_LENGTH]; | |
41 | struct thermal_zone_device *tz; | |
42 | struct thermal_cooling_device *cdev; | |
43 | int trip; | |
44 | bool initialized; | |
45 | unsigned long upper; /* Highest cooling state for this trip point */ | |
46 | unsigned long lower; /* Lowest cooling state for this trip point */ | |
47 | unsigned long target; /* expected cooling state */ | |
48 | char attr_name[THERMAL_NAME_LENGTH]; | |
49 | struct device_attribute attr; | |
50 | char weight_attr_name[THERMAL_NAME_LENGTH]; | |
51 | struct device_attribute weight_attr; | |
52 | struct list_head tz_node; /* node in tz->thermal_instances */ | |
53 | struct list_head cdev_node; /* node in cdev->thermal_instances */ | |
54 | unsigned int weight; /* The weight of the cooling device */ | |
55 | }; | |
56 | ||
57 | #define to_thermal_zone(_dev) \ | |
58 | container_of(_dev, struct thermal_zone_device, device) | |
59 | ||
60 | #define to_cooling_device(_dev) \ | |
61 | container_of(_dev, struct thermal_cooling_device, device) | |
62 | ||
63 | int thermal_register_governor(struct thermal_governor *); | |
64 | void thermal_unregister_governor(struct thermal_governor *); | |
65 | void thermal_zone_device_rebind_exception(struct thermal_zone_device *, | |
66 | const char *, size_t); | |
67 | void thermal_zone_device_unbind_exception(struct thermal_zone_device *, | |
68 | const char *, size_t); | |
69 | int thermal_zone_device_set_policy(struct thermal_zone_device *, char *); | |
70 | int thermal_build_list_of_policies(char *buf); | |
71 | ||
72 | /* sysfs I/F */ | |
73 | int thermal_zone_create_device_groups(struct thermal_zone_device *, int); | |
74 | void thermal_zone_destroy_device_groups(struct thermal_zone_device *); | |
75 | void thermal_cooling_device_setup_sysfs(struct thermal_cooling_device *); | |
76 | /* used only at binding time */ | |
77 | ssize_t | |
78 | thermal_cooling_device_trip_point_show(struct device *, | |
79 | struct device_attribute *, char *); | |
80 | ssize_t thermal_cooling_device_weight_show(struct device *, | |
81 | struct device_attribute *, char *); | |
82 | ||
83 | ssize_t thermal_cooling_device_weight_store(struct device *, | |
84 | struct device_attribute *, | |
85 | const char *, size_t); | |
86 | ||
87 | #ifdef CONFIG_THERMAL_GOV_STEP_WISE | |
88 | int thermal_gov_step_wise_register(void); | |
89 | void thermal_gov_step_wise_unregister(void); | |
90 | #else | |
91 | static inline int thermal_gov_step_wise_register(void) { return 0; } | |
92 | static inline void thermal_gov_step_wise_unregister(void) {} | |
93 | #endif /* CONFIG_THERMAL_GOV_STEP_WISE */ | |
94 | ||
95 | #ifdef CONFIG_THERMAL_GOV_FAIR_SHARE | |
96 | int thermal_gov_fair_share_register(void); | |
97 | void thermal_gov_fair_share_unregister(void); | |
98 | #else | |
99 | static inline int thermal_gov_fair_share_register(void) { return 0; } | |
100 | static inline void thermal_gov_fair_share_unregister(void) {} | |
101 | #endif /* CONFIG_THERMAL_GOV_FAIR_SHARE */ | |
102 | ||
103 | #ifdef CONFIG_THERMAL_GOV_BANG_BANG | |
104 | int thermal_gov_bang_bang_register(void); | |
105 | void thermal_gov_bang_bang_unregister(void); | |
106 | #else | |
107 | static inline int thermal_gov_bang_bang_register(void) { return 0; } | |
108 | static inline void thermal_gov_bang_bang_unregister(void) {} | |
109 | #endif /* CONFIG_THERMAL_GOV_BANG_BANG */ | |
110 | ||
111 | #ifdef CONFIG_THERMAL_GOV_USER_SPACE | |
112 | int thermal_gov_user_space_register(void); | |
113 | void thermal_gov_user_space_unregister(void); | |
114 | #else | |
115 | static inline int thermal_gov_user_space_register(void) { return 0; } | |
116 | static inline void thermal_gov_user_space_unregister(void) {} | |
117 | #endif /* CONFIG_THERMAL_GOV_USER_SPACE */ | |
118 | ||
119 | #ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR | |
120 | int thermal_gov_power_allocator_register(void); | |
121 | void thermal_gov_power_allocator_unregister(void); | |
122 | #else | |
123 | static inline int thermal_gov_power_allocator_register(void) { return 0; } | |
124 | static inline void thermal_gov_power_allocator_unregister(void) {} | |
125 | #endif /* CONFIG_THERMAL_GOV_POWER_ALLOCATOR */ | |
126 | ||
127 | /* device tree support */ | |
128 | #ifdef CONFIG_THERMAL_OF | |
129 | int of_parse_thermal_zones(void); | |
130 | void of_thermal_destroy_zones(void); | |
131 | int of_thermal_get_ntrips(struct thermal_zone_device *); | |
132 | bool of_thermal_is_trip_valid(struct thermal_zone_device *, int); | |
133 | const struct thermal_trip * | |
134 | of_thermal_get_trip_points(struct thermal_zone_device *); | |
135 | #else | |
136 | static inline int of_parse_thermal_zones(void) { return 0; } | |
137 | static inline void of_thermal_destroy_zones(void) { } | |
138 | static inline int of_thermal_get_ntrips(struct thermal_zone_device *tz) | |
139 | { | |
140 | return 0; | |
141 | } | |
142 | static inline bool of_thermal_is_trip_valid(struct thermal_zone_device *tz, | |
143 | int trip) | |
144 | { | |
145 | return false; | |
146 | } | |
147 | static inline const struct thermal_trip * | |
148 | of_thermal_get_trip_points(struct thermal_zone_device *tz) | |
149 | { | |
150 | return NULL; | |
151 | } | |
152 | #endif | |
153 | ||
154 | #endif /* __THERMAL_CORE_H__ */ |