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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
31struct thermal_zone_device;
32struct thermal_cooling_device;
33
34struct thermal_zone_device_ops {
35 int (*bind) (struct thermal_zone_device *,
36 struct thermal_cooling_device *);
37 int (*unbind) (struct thermal_zone_device *,
38 struct thermal_cooling_device *);
39 int (*get_temp) (struct thermal_zone_device *, char *);
40 int (*get_mode) (struct thermal_zone_device *, char *);
41 int (*set_mode) (struct thermal_zone_device *, const char *);
42 int (*get_trip_type) (struct thermal_zone_device *, int, char *);
43 int (*get_trip_temp) (struct thermal_zone_device *, int, char *);
44 int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
45};
46
47struct thermal_cooling_device_ops {
48 int (*get_max_state) (struct thermal_cooling_device *, char *);
49 int (*get_cur_state) (struct thermal_cooling_device *, char *);
50 int (*set_cur_state) (struct thermal_cooling_device *, unsigned int);
51};
52
53#define THERMAL_TRIPS_NONE -1
54#define THERMAL_MAX_TRIPS 12
55#define THERMAL_NAME_LENGTH 20
56struct thermal_cooling_device {
57 int id;
58 char type[THERMAL_NAME_LENGTH];
59 struct device device;
60 void *devdata;
61 struct thermal_cooling_device_ops *ops;
62 struct list_head node;
63};
64
65#define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \
66 ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
67#define CELSIUS_TO_KELVIN(t) ((t)*10+2732)
68
69#if defined(CONFIG_THERMAL_HWMON)
70/* thermal zone devices with the same type share one hwmon device */
71struct thermal_hwmon_device {
72 char type[THERMAL_NAME_LENGTH];
73 struct device *device;
74 int count;
75 struct list_head tz_list;
76 struct list_head node;
77};
78
79struct thermal_hwmon_attr {
80 struct device_attribute attr;
81 char name[16];
82};
83#endif
84
85struct thermal_zone_device {
86 int id;
87 char type[THERMAL_NAME_LENGTH];
88 struct device device;
89 void *devdata;
90 int trips;
91 struct thermal_zone_device_ops *ops;
92 struct list_head cooling_devices;
93 struct idr idr;
94 struct mutex lock; /* protect cooling devices list */
95 struct list_head node;
96#if defined(CONFIG_THERMAL_HWMON)
97 struct list_head hwmon_node;
98 struct thermal_hwmon_device *hwmon;
99 struct thermal_hwmon_attr temp_input; /* hwmon sys attr */
100 struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */
101#endif
102};
103
104struct thermal_zone_device *thermal_zone_device_register(char *, int, void *,
105 struct
106 thermal_zone_device_ops
107 *);
108void thermal_zone_device_unregister(struct thermal_zone_device *);
109
110int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
111 struct thermal_cooling_device *);
112int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
113 struct thermal_cooling_device *);
114struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
115 struct
116 thermal_cooling_device_ops
117 *);
118void thermal_cooling_device_unregister(struct thermal_cooling_device *);
119
120#endif /* __THERMAL_H__ */