4 * Copyright (C) 2012 Intel Corp
5 * Author: Durgadoss R <durgadoss.r@intel.com>
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.
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.
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.
21 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 #ifndef __THERMAL_CORE_H__
25 #define __THERMAL_CORE_H__
27 #include <linux/device.h>
28 #include <linux/thermal.h>
30 /* Initial state of a cooling device during binding */
31 #define THERMAL_NO_TARGET -1UL
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
38 struct thermal_instance {
40 char name[THERMAL_NAME_LENGTH];
41 struct thermal_zone_device *tz;
42 struct thermal_cooling_device *cdev;
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 */
57 #define to_thermal_zone(_dev) \
58 container_of(_dev, struct thermal_zone_device, device)
60 int thermal_register_governor(struct thermal_governor *);
61 void thermal_unregister_governor(struct thermal_governor *);
62 void thermal_zone_device_rebind_exception(struct thermal_zone_device *,
63 const char *, size_t);
64 void thermal_zone_device_unbind_exception(struct thermal_zone_device *,
65 const char *, size_t);
66 int thermal_zone_device_set_policy(struct thermal_zone_device *, char *);
67 int thermal_build_list_of_policies(char *buf);
69 #ifdef CONFIG_THERMAL_GOV_STEP_WISE
70 int thermal_gov_step_wise_register(void);
71 void thermal_gov_step_wise_unregister(void);
73 static inline int thermal_gov_step_wise_register(void) { return 0; }
74 static inline void thermal_gov_step_wise_unregister(void) {}
75 #endif /* CONFIG_THERMAL_GOV_STEP_WISE */
77 #ifdef CONFIG_THERMAL_GOV_FAIR_SHARE
78 int thermal_gov_fair_share_register(void);
79 void thermal_gov_fair_share_unregister(void);
81 static inline int thermal_gov_fair_share_register(void) { return 0; }
82 static inline void thermal_gov_fair_share_unregister(void) {}
83 #endif /* CONFIG_THERMAL_GOV_FAIR_SHARE */
85 #ifdef CONFIG_THERMAL_GOV_BANG_BANG
86 int thermal_gov_bang_bang_register(void);
87 void thermal_gov_bang_bang_unregister(void);
89 static inline int thermal_gov_bang_bang_register(void) { return 0; }
90 static inline void thermal_gov_bang_bang_unregister(void) {}
91 #endif /* CONFIG_THERMAL_GOV_BANG_BANG */
93 #ifdef CONFIG_THERMAL_GOV_USER_SPACE
94 int thermal_gov_user_space_register(void);
95 void thermal_gov_user_space_unregister(void);
97 static inline int thermal_gov_user_space_register(void) { return 0; }
98 static inline void thermal_gov_user_space_unregister(void) {}
99 #endif /* CONFIG_THERMAL_GOV_USER_SPACE */
101 #ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
102 int thermal_gov_power_allocator_register(void);
103 void thermal_gov_power_allocator_unregister(void);
105 static inline int thermal_gov_power_allocator_register(void) { return 0; }
106 static inline void thermal_gov_power_allocator_unregister(void) {}
107 #endif /* CONFIG_THERMAL_GOV_POWER_ALLOCATOR */
109 /* device tree support */
110 #ifdef CONFIG_THERMAL_OF
111 int of_parse_thermal_zones(void);
112 void of_thermal_destroy_zones(void);
113 int of_thermal_get_ntrips(struct thermal_zone_device *);
114 bool of_thermal_is_trip_valid(struct thermal_zone_device *, int);
115 const struct thermal_trip *
116 of_thermal_get_trip_points(struct thermal_zone_device *);
118 static inline int of_parse_thermal_zones(void) { return 0; }
119 static inline void of_thermal_destroy_zones(void) { }
120 static inline int of_thermal_get_ntrips(struct thermal_zone_device *tz)
124 static inline bool of_thermal_is_trip_valid(struct thermal_zone_device *tz,
129 static inline const struct thermal_trip *
130 of_thermal_get_trip_points(struct thermal_zone_device *tz)
136 #endif /* __THERMAL_CORE_H__ */