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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 */
38struct 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;
bb431ba2 44 bool initialized;
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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;
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50 char weight_attr_name[THERMAL_NAME_LENGTH];
51 struct device_attribute weight_attr;
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52 struct list_head tz_node; /* node in tz->thermal_instances */
53 struct list_head cdev_node; /* node in cdev->thermal_instances */
6cd9e9f6 54 unsigned int weight; /* The weight of the cooling device */
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55};
56
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57#define to_thermal_zone(_dev) \
58 container_of(_dev, struct thermal_zone_device, device)
59
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60int thermal_register_governor(struct thermal_governor *);
61void thermal_unregister_governor(struct thermal_governor *);
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62void thermal_zone_device_rebind_exception(struct thermal_zone_device *,
63 const char *, size_t);
64void thermal_zone_device_unbind_exception(struct thermal_zone_device *,
65 const char *, size_t);
6b885202 66int thermal_zone_device_set_policy(struct thermal_zone_device *, char *);
97d2423b 67int thermal_build_list_of_policies(char *buf);
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68
69#ifdef CONFIG_THERMAL_GOV_STEP_WISE
70int thermal_gov_step_wise_register(void);
71void thermal_gov_step_wise_unregister(void);
72#else
73static inline int thermal_gov_step_wise_register(void) { return 0; }
74static inline void thermal_gov_step_wise_unregister(void) {}
75#endif /* CONFIG_THERMAL_GOV_STEP_WISE */
76
77#ifdef CONFIG_THERMAL_GOV_FAIR_SHARE
78int thermal_gov_fair_share_register(void);
79void thermal_gov_fair_share_unregister(void);
80#else
81static inline int thermal_gov_fair_share_register(void) { return 0; }
82static inline void thermal_gov_fair_share_unregister(void) {}
83#endif /* CONFIG_THERMAL_GOV_FAIR_SHARE */
84
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85#ifdef CONFIG_THERMAL_GOV_BANG_BANG
86int thermal_gov_bang_bang_register(void);
87void thermal_gov_bang_bang_unregister(void);
88#else
89static inline int thermal_gov_bang_bang_register(void) { return 0; }
90static inline void thermal_gov_bang_bang_unregister(void) {}
91#endif /* CONFIG_THERMAL_GOV_BANG_BANG */
92
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93#ifdef CONFIG_THERMAL_GOV_USER_SPACE
94int thermal_gov_user_space_register(void);
95void thermal_gov_user_space_unregister(void);
96#else
97static inline int thermal_gov_user_space_register(void) { return 0; }
98static inline void thermal_gov_user_space_unregister(void) {}
99#endif /* CONFIG_THERMAL_GOV_USER_SPACE */
100
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101#ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
102int thermal_gov_power_allocator_register(void);
103void thermal_gov_power_allocator_unregister(void);
104#else
105static inline int thermal_gov_power_allocator_register(void) { return 0; }
106static inline void thermal_gov_power_allocator_unregister(void) {}
107#endif /* CONFIG_THERMAL_GOV_POWER_ALLOCATOR */
108
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109/* device tree support */
110#ifdef CONFIG_THERMAL_OF
111int of_parse_thermal_zones(void);
112void of_thermal_destroy_zones(void);
08dab66e 113int of_thermal_get_ntrips(struct thermal_zone_device *);
a9bf2cc4 114bool of_thermal_is_trip_valid(struct thermal_zone_device *, int);
ebc3193a 115const struct thermal_trip *
ce8be778 116of_thermal_get_trip_points(struct thermal_zone_device *);
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117#else
118static inline int of_parse_thermal_zones(void) { return 0; }
119static inline void of_thermal_destroy_zones(void) { }
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120static inline int of_thermal_get_ntrips(struct thermal_zone_device *tz)
121{
122 return 0;
123}
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124static inline bool of_thermal_is_trip_valid(struct thermal_zone_device *tz,
125 int trip)
126{
ce1d9491 127 return false;
a9bf2cc4 128}
ebc3193a 129static inline const struct thermal_trip *
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130of_thermal_get_trip_points(struct thermal_zone_device *tz)
131{
132 return NULL;
133}
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134#endif
135
71350db4 136#endif /* __THERMAL_CORE_H__ */