2 * thermal.h ($Revision: 0 $)
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>
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.
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.
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.
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
28 #include <linux/idr.h>
29 #include <linux/device.h>
30 #include <linux/workqueue.h>
32 struct thermal_zone_device;
33 struct thermal_cooling_device;
35 enum thermal_device_mode {
36 THERMAL_DEVICE_DISABLED = 0,
37 THERMAL_DEVICE_ENABLED,
40 enum thermal_trip_type {
41 THERMAL_TRIP_ACTIVE = 0,
44 THERMAL_TRIP_CRITICAL,
47 struct thermal_zone_device_ops {
48 int (*bind) (struct thermal_zone_device *,
49 struct thermal_cooling_device *);
50 int (*unbind) (struct thermal_zone_device *,
51 struct thermal_cooling_device *);
52 int (*get_temp) (struct thermal_zone_device *, unsigned long *);
53 int (*get_mode) (struct thermal_zone_device *,
54 enum thermal_device_mode *);
55 int (*set_mode) (struct thermal_zone_device *,
56 enum thermal_device_mode);
57 int (*get_trip_type) (struct thermal_zone_device *, int,
58 enum thermal_trip_type *);
59 int (*get_trip_temp) (struct thermal_zone_device *, int,
61 int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
62 int (*notify) (struct thermal_zone_device *, int,
63 enum thermal_trip_type);
66 struct thermal_cooling_device_ops {
67 int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
68 int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
69 int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
72 #define THERMAL_TRIPS_NONE -1
73 #define THERMAL_MAX_TRIPS 12
74 #define THERMAL_NAME_LENGTH 20
75 struct thermal_cooling_device {
77 char type[THERMAL_NAME_LENGTH];
80 struct thermal_cooling_device_ops *ops;
81 struct list_head node;
84 #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \
85 ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
86 #define CELSIUS_TO_KELVIN(t) ((t)*10+2732)
88 #if defined(CONFIG_THERMAL_HWMON)
89 /* thermal zone devices with the same type share one hwmon device */
90 struct thermal_hwmon_device {
91 char type[THERMAL_NAME_LENGTH];
92 struct device *device;
94 struct list_head tz_list;
95 struct list_head node;
98 struct thermal_hwmon_attr {
99 struct device_attribute attr;
104 struct thermal_zone_device {
106 char type[THERMAL_NAME_LENGTH];
107 struct device device;
114 int last_temperature;
116 unsigned int forced_passive;
117 struct thermal_zone_device_ops *ops;
118 struct list_head cooling_devices;
120 struct mutex lock; /* protect cooling devices list */
121 struct list_head node;
122 struct delayed_work poll_queue;
123 #if defined(CONFIG_THERMAL_HWMON)
124 struct list_head hwmon_node;
125 struct thermal_hwmon_device *hwmon;
126 struct thermal_hwmon_attr temp_input; /* hwmon sys attr */
127 struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */
131 struct thermal_zone_device *thermal_zone_device_register(char *, int, void *,
133 thermal_zone_device_ops
137 void thermal_zone_device_unregister(struct thermal_zone_device *);
139 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
140 struct thermal_cooling_device *);
141 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
142 struct thermal_cooling_device *);
143 void thermal_zone_device_update(struct thermal_zone_device *);
144 struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
146 thermal_cooling_device_ops
148 void thermal_cooling_device_unregister(struct thermal_cooling_device *);
150 #endif /* __THERMAL_H__ */