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 #define THERMAL_TRIPS_NONE -1
33 #define THERMAL_MAX_TRIPS 12
34 #define THERMAL_NAME_LENGTH 20
36 /* No upper/lower limit requirement */
37 #define THERMAL_NO_LIMIT -1UL
39 /* Unit conversion macros */
40 #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \
41 ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
42 #define CELSIUS_TO_KELVIN(t) ((t)*10+2732)
44 /* Adding event notification support elements */
45 #define THERMAL_GENL_FAMILY_NAME "thermal_event"
46 #define THERMAL_GENL_VERSION 0x01
47 #define THERMAL_GENL_MCAST_GROUP_NAME "thermal_mc_group"
49 struct thermal_zone_device;
50 struct thermal_cooling_device;
52 enum thermal_device_mode {
53 THERMAL_DEVICE_DISABLED = 0,
54 THERMAL_DEVICE_ENABLED,
57 enum thermal_trip_type {
58 THERMAL_TRIP_ACTIVE = 0,
61 THERMAL_TRIP_CRITICAL,
65 THERMAL_TREND_STABLE, /* temperature is stable */
66 THERMAL_TREND_RAISING, /* temperature is raising */
67 THERMAL_TREND_DROPPING, /* temperature is dropping */
70 /* Events supported by Thermal Netlink */
78 /* attributes of thermal_genl_family */
80 THERMAL_GENL_ATTR_UNSPEC,
81 THERMAL_GENL_ATTR_EVENT,
82 __THERMAL_GENL_ATTR_MAX,
84 #define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1)
86 /* commands supported by the thermal_genl_family */
88 THERMAL_GENL_CMD_UNSPEC,
89 THERMAL_GENL_CMD_EVENT,
90 __THERMAL_GENL_CMD_MAX,
92 #define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)
94 struct thermal_zone_device_ops {
95 int (*bind) (struct thermal_zone_device *,
96 struct thermal_cooling_device *);
97 int (*unbind) (struct thermal_zone_device *,
98 struct thermal_cooling_device *);
99 int (*get_temp) (struct thermal_zone_device *, unsigned long *);
100 int (*get_mode) (struct thermal_zone_device *,
101 enum thermal_device_mode *);
102 int (*set_mode) (struct thermal_zone_device *,
103 enum thermal_device_mode);
104 int (*get_trip_type) (struct thermal_zone_device *, int,
105 enum thermal_trip_type *);
106 int (*get_trip_temp) (struct thermal_zone_device *, int,
108 int (*set_trip_temp) (struct thermal_zone_device *, int,
110 int (*get_trip_hyst) (struct thermal_zone_device *, int,
112 int (*set_trip_hyst) (struct thermal_zone_device *, int,
114 int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
115 int (*get_trend) (struct thermal_zone_device *, int,
116 enum thermal_trend *);
117 int (*notify) (struct thermal_zone_device *, int,
118 enum thermal_trip_type);
121 struct thermal_cooling_device_ops {
122 int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
123 int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
124 int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
127 struct thermal_cooling_device {
129 char type[THERMAL_NAME_LENGTH];
130 struct device device;
132 const struct thermal_cooling_device_ops *ops;
133 bool updated; /* true if the cooling device does not need update */
134 struct mutex lock; /* protect thermal_instances list */
135 struct list_head thermal_instances;
136 struct list_head node;
139 struct thermal_attr {
140 struct device_attribute attr;
141 char name[THERMAL_NAME_LENGTH];
144 struct thermal_zone_device {
146 char type[THERMAL_NAME_LENGTH];
147 struct device device;
148 struct thermal_attr *trip_temp_attrs;
149 struct thermal_attr *trip_type_attrs;
150 struct thermal_attr *trip_hyst_attrs;
156 int last_temperature;
158 unsigned int forced_passive;
159 const struct thermal_zone_device_ops *ops;
160 struct list_head thermal_instances;
162 struct mutex lock; /* protect thermal_instances list */
163 struct list_head node;
164 struct delayed_work poll_queue;
167 struct thermal_genl_event {
172 /* Function declarations */
173 struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,
174 void *, const struct thermal_zone_device_ops *, int, int);
175 void thermal_zone_device_unregister(struct thermal_zone_device *);
177 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
178 struct thermal_cooling_device *,
179 unsigned long, unsigned long);
180 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
181 struct thermal_cooling_device *);
182 void thermal_zone_device_update(struct thermal_zone_device *);
184 struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
185 const struct thermal_cooling_device_ops *);
186 void thermal_cooling_device_unregister(struct thermal_cooling_device *);
189 extern int thermal_generate_netlink_event(u32 orig, enum events event);
191 static inline int thermal_generate_netlink_event(u32 orig, enum events event)
197 #endif /* __THERMAL_H__ */