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thermal: use integers rather than strings for thermal values
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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 enum thermal_device_mode {
35         THERMAL_DEVICE_DISABLED = 0,
36         THERMAL_DEVICE_ENABLED,
37 };
38
39 enum thermal_trip_type {
40         THERMAL_TRIP_ACTIVE = 0,
41         THERMAL_TRIP_PASSIVE,
42         THERMAL_TRIP_HOT,
43         THERMAL_TRIP_CRITICAL,
44 };
45
46 struct thermal_zone_device_ops {
47         int (*bind) (struct thermal_zone_device *,
48                      struct thermal_cooling_device *);
49         int (*unbind) (struct thermal_zone_device *,
50                        struct thermal_cooling_device *);
51         int (*get_temp) (struct thermal_zone_device *, unsigned long *);
52         int (*get_mode) (struct thermal_zone_device *,
53                          enum thermal_device_mode *);
54         int (*set_mode) (struct thermal_zone_device *,
55                 enum thermal_device_mode);
56         int (*get_trip_type) (struct thermal_zone_device *, int,
57                 enum thermal_trip_type *);
58         int (*get_trip_temp) (struct thermal_zone_device *, int,
59                               unsigned long *);
60         int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
61 };
62
63 struct thermal_cooling_device_ops {
64         int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
65         int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
66         int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
67 };
68
69 #define THERMAL_TRIPS_NONE -1
70 #define THERMAL_MAX_TRIPS 12
71 #define THERMAL_NAME_LENGTH 20
72 struct thermal_cooling_device {
73         int id;
74         char type[THERMAL_NAME_LENGTH];
75         struct device device;
76         void *devdata;
77         struct thermal_cooling_device_ops *ops;
78         struct list_head node;
79 };
80
81 #define KELVIN_TO_CELSIUS(t)    (long)(((long)t-2732 >= 0) ?    \
82                                 ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
83 #define CELSIUS_TO_KELVIN(t)    ((t)*10+2732)
84
85 #if defined(CONFIG_THERMAL_HWMON)
86 /* thermal zone devices with the same type share one hwmon device */
87 struct thermal_hwmon_device {
88         char type[THERMAL_NAME_LENGTH];
89         struct device *device;
90         int count;
91         struct list_head tz_list;
92         struct list_head node;
93 };
94
95 struct thermal_hwmon_attr {
96         struct device_attribute attr;
97         char name[16];
98 };
99 #endif
100
101 struct thermal_zone_device {
102         int id;
103         char type[THERMAL_NAME_LENGTH];
104         struct device device;
105         void *devdata;
106         int trips;
107         struct thermal_zone_device_ops *ops;
108         struct list_head cooling_devices;
109         struct idr idr;
110         struct mutex lock;      /* protect cooling devices list */
111         struct list_head node;
112 #if defined(CONFIG_THERMAL_HWMON)
113         struct list_head hwmon_node;
114         struct thermal_hwmon_device *hwmon;
115         struct thermal_hwmon_attr temp_input;   /* hwmon sys attr */
116         struct thermal_hwmon_attr temp_crit;    /* hwmon sys attr */
117 #endif
118 };
119
120 struct thermal_zone_device *thermal_zone_device_register(char *, int, void *,
121                                                          struct
122                                                          thermal_zone_device_ops
123                                                          *);
124 void thermal_zone_device_unregister(struct thermal_zone_device *);
125
126 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
127                                      struct thermal_cooling_device *);
128 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
129                                        struct thermal_cooling_device *);
130 struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
131                                                                struct
132                                                                thermal_cooling_device_ops
133                                                                *);
134 void thermal_cooling_device_unregister(struct thermal_cooling_device *);
135
136 #endif /* __THERMAL_H__ */