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
,
48 THERMAL_TREND_STABLE
, /* temperature is stable */
49 THERMAL_TREND_RAISING
, /* temperature is raising */
50 THERMAL_TREND_DROPPING
, /* temperature is dropping */
53 struct thermal_zone_device_ops
{
54 int (*bind
) (struct thermal_zone_device
*,
55 struct thermal_cooling_device
*);
56 int (*unbind
) (struct thermal_zone_device
*,
57 struct thermal_cooling_device
*);
58 int (*get_temp
) (struct thermal_zone_device
*, unsigned long *);
59 int (*get_mode
) (struct thermal_zone_device
*,
60 enum thermal_device_mode
*);
61 int (*set_mode
) (struct thermal_zone_device
*,
62 enum thermal_device_mode
);
63 int (*get_trip_type
) (struct thermal_zone_device
*, int,
64 enum thermal_trip_type
*);
65 int (*get_trip_temp
) (struct thermal_zone_device
*, int,
67 int (*set_trip_temp
) (struct thermal_zone_device
*, int,
69 int (*get_trip_hyst
) (struct thermal_zone_device
*, int,
71 int (*set_trip_hyst
) (struct thermal_zone_device
*, int,
73 int (*get_crit_temp
) (struct thermal_zone_device
*, unsigned long *);
74 int (*get_trend
) (struct thermal_zone_device
*, int,
75 enum thermal_trend
*);
76 int (*notify
) (struct thermal_zone_device
*, int,
77 enum thermal_trip_type
);
80 struct thermal_cooling_device_ops
{
81 int (*get_max_state
) (struct thermal_cooling_device
*, unsigned long *);
82 int (*get_cur_state
) (struct thermal_cooling_device
*, unsigned long *);
83 int (*set_cur_state
) (struct thermal_cooling_device
*, unsigned long);
86 #define THERMAL_NO_LIMIT -1UL /* no upper/lower limit requirement */
88 #define THERMAL_TRIPS_NONE -1
89 #define THERMAL_MAX_TRIPS 12
90 #define THERMAL_NAME_LENGTH 20
91 struct thermal_cooling_device
{
93 char type
[THERMAL_NAME_LENGTH
];
96 const struct thermal_cooling_device_ops
*ops
;
97 bool updated
; /* true if the cooling device does not need update */
98 struct list_head thermal_instances
;
99 struct list_head node
;
102 #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \
103 ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
104 #define CELSIUS_TO_KELVIN(t) ((t)*10+2732)
106 struct thermal_attr
{
107 struct device_attribute attr
;
108 char name
[THERMAL_NAME_LENGTH
];
111 struct thermal_zone_device
{
113 char type
[THERMAL_NAME_LENGTH
];
114 struct device device
;
115 struct thermal_attr
*trip_temp_attrs
;
116 struct thermal_attr
*trip_type_attrs
;
117 struct thermal_attr
*trip_hyst_attrs
;
123 int last_temperature
;
125 unsigned int forced_passive
;
126 const struct thermal_zone_device_ops
*ops
;
127 struct list_head thermal_instances
;
129 struct mutex lock
; /* protect thermal_instances list */
130 struct list_head node
;
131 struct delayed_work poll_queue
;
133 /* Adding event notification support elements */
134 #define THERMAL_GENL_FAMILY_NAME "thermal_event"
135 #define THERMAL_GENL_VERSION 0x01
136 #define THERMAL_GENL_MCAST_GROUP_NAME "thermal_mc_group"
145 struct thermal_genl_event
{
149 /* attributes of thermal_genl_family */
151 THERMAL_GENL_ATTR_UNSPEC
,
152 THERMAL_GENL_ATTR_EVENT
,
153 __THERMAL_GENL_ATTR_MAX
,
155 #define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1)
157 /* commands supported by the thermal_genl_family */
159 THERMAL_GENL_CMD_UNSPEC
,
160 THERMAL_GENL_CMD_EVENT
,
161 __THERMAL_GENL_CMD_MAX
,
163 #define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)
165 struct thermal_zone_device
*thermal_zone_device_register(const char *, int, int,
166 void *, const struct thermal_zone_device_ops
*, int, int);
167 void thermal_zone_device_unregister(struct thermal_zone_device
*);
169 int thermal_zone_bind_cooling_device(struct thermal_zone_device
*, int,
170 struct thermal_cooling_device
*,
171 unsigned long, unsigned long);
172 int thermal_zone_unbind_cooling_device(struct thermal_zone_device
*, int,
173 struct thermal_cooling_device
*);
174 void thermal_zone_device_update(struct thermal_zone_device
*);
175 struct thermal_cooling_device
*thermal_cooling_device_register(char *, void *,
176 const struct thermal_cooling_device_ops
*);
177 void thermal_cooling_device_unregister(struct thermal_cooling_device
*);
180 extern int thermal_generate_netlink_event(u32 orig
, enum events event
);
182 static inline int thermal_generate_netlink_event(u32 orig
, enum events event
)
188 #endif /* __THERMAL_H__ */