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/notifier.h>
31 #include <linux/workqueue.h>
33 struct thermal_zone_device;
34 struct thermal_cooling_device;
36 enum thermal_device_mode {
37 THERMAL_DEVICE_DISABLED = 0,
38 THERMAL_DEVICE_ENABLED,
41 enum thermal_trip_type {
42 THERMAL_TRIP_ACTIVE = 0,
45 THERMAL_TRIP_CRITICAL,
48 enum cooling_device_state {
54 struct thermal_zone_device_ops {
55 int (*bind) (struct thermal_zone_device *,
56 struct thermal_cooling_device *);
57 int (*unbind) (struct thermal_zone_device *,
58 struct thermal_cooling_device *);
59 int (*get_temp) (struct thermal_zone_device *, unsigned long *);
60 int (*get_mode) (struct thermal_zone_device *,
61 enum thermal_device_mode *);
62 int (*set_mode) (struct thermal_zone_device *,
63 enum thermal_device_mode);
64 int (*get_trip_type) (struct thermal_zone_device *, int,
65 enum thermal_trip_type *);
66 int (*get_trip_temp) (struct thermal_zone_device *, int,
68 int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
69 int (*notify) (struct thermal_zone_device *, int,
70 enum thermal_trip_type);
73 struct thermal_cooling_device_ops {
74 int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
75 int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
76 int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
79 #define THERMAL_TRIPS_NONE -1
80 #define THERMAL_MAX_TRIPS 12
81 #define THERMAL_NAME_LENGTH 20
82 struct thermal_cooling_device {
84 char type[THERMAL_NAME_LENGTH];
87 const struct thermal_cooling_device_ops *ops;
88 struct list_head node;
89 unsigned long delay_until;
90 enum cooling_device_state cur_state;
93 #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \
94 ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
95 #define CELSIUS_TO_KELVIN(t) ((t)*10+2732)
97 struct thermal_zone_device {
99 char type[THERMAL_NAME_LENGTH];
100 struct device device;
107 int last_temperature;
109 unsigned int forced_passive;
110 const struct thermal_zone_device_ops *ops;
111 struct list_head cooling_devices;
113 struct mutex lock; /* protect cooling devices list */
114 struct list_head node;
115 struct delayed_work poll_queue;
116 unsigned int fan_on_delay; /* time in seconds to delay fan turn on */
118 unsigned int cdevs_aborted_turn_on;
119 unsigned int cdevs_multiple_trips;
120 unsigned int cdevs_turned_on;
121 struct dentry *debugfs_dir;
123 /* Adding event notification support elements */
124 #define THERMAL_GENL_FAMILY_NAME "thermal_event"
125 #define THERMAL_GENL_VERSION 0x01
126 #define THERMAL_GENL_MCAST_GROUP_NAME "thermal_mc_group"
135 struct thermal_genl_event {
139 /* attributes of thermal_genl_family */
141 THERMAL_GENL_ATTR_UNSPEC,
142 THERMAL_GENL_ATTR_EVENT,
143 __THERMAL_GENL_ATTR_MAX,
145 #define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1)
147 /* commands supported by the thermal_genl_family */
149 THERMAL_GENL_CMD_UNSPEC,
150 THERMAL_GENL_CMD_EVENT,
151 __THERMAL_GENL_CMD_MAX,
153 #define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)
155 struct thermal_zone_device *thermal_zone_device_register(char *, int, void *,
156 const struct thermal_zone_device_ops *, int tc1, int tc2,
157 int passive_freq, int polling_freq);
158 void thermal_zone_device_unregister(struct thermal_zone_device *);
160 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
161 struct thermal_cooling_device *);
162 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
163 struct thermal_cooling_device *);
164 void thermal_zone_device_update(struct thermal_zone_device *);
165 struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
166 const struct thermal_cooling_device_ops *);
167 void thermal_cooling_device_unregister(struct thermal_cooling_device *);
170 extern int thermal_generate_netlink_event(u32 orig, enum events event);
172 static inline int thermal_generate_netlink_event(u32 orig, enum events event)
178 extern int register_thermal_notifier(struct notifier_block *);
179 extern int unregister_thermal_notifier(struct notifier_block *);
181 #endif /* __THERMAL_H__ */