Linux kernel mirror (for testing)
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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#include <linux/workqueue.h>
31
32struct thermal_zone_device;
33struct thermal_cooling_device;
34
35enum thermal_device_mode {
36 THERMAL_DEVICE_DISABLED = 0,
37 THERMAL_DEVICE_ENABLED,
38};
39
40enum thermal_trip_type {
41 THERMAL_TRIP_ACTIVE = 0,
42 THERMAL_TRIP_PASSIVE,
43 THERMAL_TRIP_HOT,
44 THERMAL_TRIP_CRITICAL,
45};
46
47struct 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,
60 unsigned long *);
61 int (*set_trip_temp) (struct thermal_zone_device *, int,
62 unsigned long);
63 int (*get_trip_hyst) (struct thermal_zone_device *, int,
64 unsigned long *);
65 int (*set_trip_hyst) (struct thermal_zone_device *, int,
66 unsigned long);
67 int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
68 int (*notify) (struct thermal_zone_device *, int,
69 enum thermal_trip_type);
70};
71
72struct thermal_cooling_device_ops {
73 int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
74 int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
75 int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
76};
77
78#define THERMAL_TRIPS_NONE -1
79#define THERMAL_MAX_TRIPS 12
80#define THERMAL_NAME_LENGTH 20
81struct thermal_cooling_device {
82 int id;
83 char type[THERMAL_NAME_LENGTH];
84 struct device device;
85 void *devdata;
86 const struct thermal_cooling_device_ops *ops;
87 struct list_head node;
88};
89
90#define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \
91 ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
92#define CELSIUS_TO_KELVIN(t) ((t)*10+2732)
93
94struct thermal_attr {
95 struct device_attribute attr;
96 char name[THERMAL_NAME_LENGTH];
97};
98
99struct thermal_zone_device {
100 int id;
101 char type[THERMAL_NAME_LENGTH];
102 struct device device;
103 struct thermal_attr *trip_temp_attrs;
104 struct thermal_attr *trip_type_attrs;
105 struct thermal_attr *trip_hyst_attrs;
106 void *devdata;
107 int trips;
108 int tc1;
109 int tc2;
110 int passive_delay;
111 int polling_delay;
112 int last_temperature;
113 bool passive;
114 unsigned int forced_passive;
115 const struct thermal_zone_device_ops *ops;
116 struct list_head cooling_devices;
117 struct idr idr;
118 struct mutex lock; /* protect cooling devices list */
119 struct list_head node;
120 struct delayed_work poll_queue;
121};
122/* Adding event notification support elements */
123#define THERMAL_GENL_FAMILY_NAME "thermal_event"
124#define THERMAL_GENL_VERSION 0x01
125#define THERMAL_GENL_MCAST_GROUP_NAME "thermal_mc_group"
126
127enum events {
128 THERMAL_AUX0,
129 THERMAL_AUX1,
130 THERMAL_CRITICAL,
131 THERMAL_DEV_FAULT,
132};
133
134struct thermal_genl_event {
135 u32 orig;
136 enum events event;
137};
138/* attributes of thermal_genl_family */
139enum {
140 THERMAL_GENL_ATTR_UNSPEC,
141 THERMAL_GENL_ATTR_EVENT,
142 __THERMAL_GENL_ATTR_MAX,
143};
144#define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1)
145
146/* commands supported by the thermal_genl_family */
147enum {
148 THERMAL_GENL_CMD_UNSPEC,
149 THERMAL_GENL_CMD_EVENT,
150 __THERMAL_GENL_CMD_MAX,
151};
152#define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)
153
154struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,
155 void *, const struct thermal_zone_device_ops *, int tc1,
156 int tc2, int passive_freq, int polling_freq);
157void thermal_zone_device_unregister(struct thermal_zone_device *);
158
159int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
160 struct thermal_cooling_device *);
161int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
162 struct thermal_cooling_device *);
163void thermal_zone_device_update(struct thermal_zone_device *);
164struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
165 const struct thermal_cooling_device_ops *);
166void thermal_cooling_device_unregister(struct thermal_cooling_device *);
167
168#ifdef CONFIG_NET
169extern int thermal_generate_netlink_event(u32 orig, enum events event);
170#else
171static inline int thermal_generate_netlink_event(u32 orig, enum events event)
172{
173 return 0;
174}
175#endif
176
177#endif /* __THERMAL_H__ */