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 	unsigned long upper;	/* Highest cooling state for this trip point */
45 	unsigned long lower;	/* Lowest cooling state for this trip point */
46 	unsigned long target;	/* expected cooling state */
47 	char attr_name[THERMAL_NAME_LENGTH];
48 	struct device_attribute attr;
49 	struct list_head tz_node; /* node in tz->thermal_instances */
50 	struct list_head cdev_node; /* node in cdev->thermal_instances */
51 };
52 
53 int thermal_register_governor(struct thermal_governor *);
54 void thermal_unregister_governor(struct thermal_governor *);
55 
56 #ifdef CONFIG_THERMAL_GOV_STEP_WISE
57 int thermal_gov_step_wise_register(void);
58 void thermal_gov_step_wise_unregister(void);
59 #else
60 static inline int thermal_gov_step_wise_register(void) { return 0; }
61 static inline void thermal_gov_step_wise_unregister(void) {}
62 #endif /* CONFIG_THERMAL_GOV_STEP_WISE */
63 
64 #ifdef CONFIG_THERMAL_GOV_FAIR_SHARE
65 int thermal_gov_fair_share_register(void);
66 void thermal_gov_fair_share_unregister(void);
67 #else
68 static inline int thermal_gov_fair_share_register(void) { return 0; }
69 static inline void thermal_gov_fair_share_unregister(void) {}
70 #endif /* CONFIG_THERMAL_GOV_FAIR_SHARE */
71 
72 #ifdef CONFIG_THERMAL_GOV_BANG_BANG
73 int thermal_gov_bang_bang_register(void);
74 void thermal_gov_bang_bang_unregister(void);
75 #else
76 static inline int thermal_gov_bang_bang_register(void) { return 0; }
77 static inline void thermal_gov_bang_bang_unregister(void) {}
78 #endif /* CONFIG_THERMAL_GOV_BANG_BANG */
79 
80 #ifdef CONFIG_THERMAL_GOV_USER_SPACE
81 int thermal_gov_user_space_register(void);
82 void thermal_gov_user_space_unregister(void);
83 #else
84 static inline int thermal_gov_user_space_register(void) { return 0; }
85 static inline void thermal_gov_user_space_unregister(void) {}
86 #endif /* CONFIG_THERMAL_GOV_USER_SPACE */
87 
88 /* device tree support */
89 #ifdef CONFIG_THERMAL_OF
90 int of_parse_thermal_zones(void);
91 void of_thermal_destroy_zones(void);
92 #else
93 static inline int of_parse_thermal_zones(void) { return 0; }
94 static inline void of_thermal_destroy_zones(void) { }
95 #endif
96 
97 #endif /* __THERMAL_CORE_H__ */
98