• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  *  thermal.h  ($Revision: 0 $)
3  *
4  *  Copyright (C) 2008  Intel Corp
5  *  Copyright (C) 2008  Zhang Rui <rui.zhang@intel.com>
6  *  Copyright (C) 2008  Sujith Thomas <sujith.thomas@intel.com>
7  *
8  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; version 2 of the License.
12  *
13  *  This program is distributed in the hope that it will be useful, but
14  *  WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  *  General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License along
19  *  with this program; if not, write to the Free Software Foundation, Inc.,
20  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21  *
22  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23  */
24 
25 #ifndef __THERMAL_H__
26 #define __THERMAL_H__
27 
28 #include <linux/idr.h>
29 #include <linux/device.h>
30 
31 struct thermal_zone_device;
32 struct thermal_cooling_device;
33 
34 struct thermal_zone_device_ops {
35 	int (*bind) (struct thermal_zone_device *,
36 		     struct thermal_cooling_device *);
37 	int (*unbind) (struct thermal_zone_device *,
38 		       struct thermal_cooling_device *);
39 	int (*get_temp) (struct thermal_zone_device *, char *);
40 	int (*get_mode) (struct thermal_zone_device *, char *);
41 	int (*set_mode) (struct thermal_zone_device *, const char *);
42 	int (*get_trip_type) (struct thermal_zone_device *, int, char *);
43 	int (*get_trip_temp) (struct thermal_zone_device *, int, char *);
44 	int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
45 };
46 
47 struct thermal_cooling_device_ops {
48 	int (*get_max_state) (struct thermal_cooling_device *, char *);
49 	int (*get_cur_state) (struct thermal_cooling_device *, char *);
50 	int (*set_cur_state) (struct thermal_cooling_device *, unsigned int);
51 };
52 
53 #define THERMAL_TRIPS_NONE -1
54 #define THERMAL_MAX_TRIPS 12
55 #define THERMAL_NAME_LENGTH 20
56 struct thermal_cooling_device {
57 	int id;
58 	char type[THERMAL_NAME_LENGTH];
59 	struct device device;
60 	void *devdata;
61 	struct thermal_cooling_device_ops *ops;
62 	struct list_head node;
63 };
64 
65 #define KELVIN_TO_CELSIUS(t)	(long)(((long)t-2732 >= 0) ?	\
66 				((long)t-2732+5)/10 : ((long)t-2732-5)/10)
67 #define CELSIUS_TO_KELVIN(t)	((t)*10+2732)
68 
69 #if defined(CONFIG_THERMAL_HWMON)
70 /* thermal zone devices with the same type share one hwmon device */
71 struct thermal_hwmon_device {
72 	char type[THERMAL_NAME_LENGTH];
73 	struct device *device;
74 	int count;
75 	struct list_head tz_list;
76 	struct list_head node;
77 };
78 
79 struct thermal_hwmon_attr {
80 	struct device_attribute attr;
81 	char name[16];
82 };
83 #endif
84 
85 struct thermal_zone_device {
86 	int id;
87 	char type[THERMAL_NAME_LENGTH];
88 	struct device device;
89 	void *devdata;
90 	int trips;
91 	struct thermal_zone_device_ops *ops;
92 	struct list_head cooling_devices;
93 	struct idr idr;
94 	struct mutex lock;	/* protect cooling devices list */
95 	struct list_head node;
96 #if defined(CONFIG_THERMAL_HWMON)
97 	struct list_head hwmon_node;
98 	struct thermal_hwmon_device *hwmon;
99 	struct thermal_hwmon_attr temp_input;	/* hwmon sys attr */
100 	struct thermal_hwmon_attr temp_crit;	/* hwmon sys attr */
101 #endif
102 };
103 
104 struct thermal_zone_device *thermal_zone_device_register(char *, int, void *,
105 							 struct
106 							 thermal_zone_device_ops
107 							 *);
108 void thermal_zone_device_unregister(struct thermal_zone_device *);
109 
110 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
111 				     struct thermal_cooling_device *);
112 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
113 				       struct thermal_cooling_device *);
114 struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
115 							       struct
116 							       thermal_cooling_device_ops
117 							       *);
118 void thermal_cooling_device_unregister(struct thermal_cooling_device *);
119 
120 #endif /* __THERMAL_H__ */
121