include/linux/thermal.h

   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
  31 struct thermal_zone_device;
  32 struct thermal_cooling_device;
  33
  34 struct 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 };
  45
  46 struct thermal_cooling_device_ops {
  47         int (*get_max_state) (struct thermal_cooling_device *, char *);
  48         int (*get_cur_state) (struct thermal_cooling_device *, char *);
  49         int (*set_cur_state) (struct thermal_cooling_device *, unsigned int);
  50 };
  51
  52 #define THERMAL_TRIPS_NONE -1
  53 #define THERMAL_MAX_TRIPS 10
  54 #define THERMAL_NAME_LENGTH 20
  55 struct thermal_cooling_device {
  56         int id;
  57         char type[THERMAL_NAME_LENGTH];
  58         struct device device;
  59         void *devdata;
  60         struct thermal_cooling_device_ops *ops;
  61         struct list_head node;
  62 };
  63
  64 #define KELVIN_TO_CELSIUS(t)    (long)(((long)t-2732 >= 0) ?    \
  65                                 ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
  66 #define CELSIUS_TO_KELVIN(t)    ((t)*10+2732)
  67
  68 struct thermal_zone_device {
  69         int id;
  70         char type[THERMAL_NAME_LENGTH];
  71         struct device device;
  72         void *devdata;
  73         int trips;
  74         struct thermal_zone_device_ops *ops;
  75         struct list_head cooling_devices;
  76         struct idr idr;
  77         struct mutex lock;      /* protect cooling devices list */
  78         struct list_head node;
  79 };
  80
  81 struct thermal_zone_device *thermal_zone_device_register(char *, int, void *,
  82                                                          struct
  83                                                          thermal_zone_device_ops
  84                                                          *);
  85 void thermal_zone_device_unregister(struct thermal_zone_device *);
  86
  87 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
  88                                      struct thermal_cooling_device *);
  89 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
  90                                        struct thermal_cooling_device *);
  91
  92 #ifdef  CONFIG_THERMAL
  93 struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
  94                                                                struct
  95                                                                thermal_cooling_device_ops
  96                                                                *);
  97 void thermal_cooling_device_unregister(struct thermal_cooling_device *);
  98 #else
  99 static inline struct thermal_cooling_device
 100 *thermal_cooling_device_register(char *c, void *v,
 101                                  struct thermal_cooling_device_ops *t)
 102 {
 103         return NULL;
 104 }
 105 static inline
 106     void thermal_cooling_device_unregister(struct thermal_cooling_device *t)
 107 {
 108 };
 109 #endif
 110
 111 #endif /* __THERMAL_H__ */