root/include/linux/thermal.h

INCLUDED FROM

/*
 *  thermal.h  ($Revision: 0 $)
 *
 *  Copyright (C) 2008  Intel Corp
 *  Copyright (C) 2008  Zhang Rui <rui.zhang@intel.com>
 *  Copyright (C) 2008  Sujith Thomas <sujith.thomas@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#ifndef __THERMAL_H__
#define __THERMAL_H__

#include <linux/idr.h>
#include <linux/device.h>

struct thermal_zone_device;
struct thermal_cooling_device;

struct thermal_zone_device_ops {
        int (*bind) (struct thermal_zone_device *,
                     struct thermal_cooling_device *);
        int (*unbind) (struct thermal_zone_device *,
                       struct thermal_cooling_device *);
        int (*get_temp) (struct thermal_zone_device *, char *);
        int (*get_mode) (struct thermal_zone_device *, char *);
        int (*set_mode) (struct thermal_zone_device *, const char *);
        int (*get_trip_type) (struct thermal_zone_device *, int, char *);
        int (*get_trip_temp) (struct thermal_zone_device *, int, char *);
        int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
};

struct thermal_cooling_device_ops {
        int (*get_max_state) (struct thermal_cooling_device *, char *);
        int (*get_cur_state) (struct thermal_cooling_device *, char *);
        int (*set_cur_state) (struct thermal_cooling_device *, unsigned int);
};

#define THERMAL_TRIPS_NONE -1
#define THERMAL_MAX_TRIPS 12
#define THERMAL_NAME_LENGTH 20
struct thermal_cooling_device {
        int id;
        char type[THERMAL_NAME_LENGTH];
        struct device device;
        void *devdata;
        struct thermal_cooling_device_ops *ops;
        struct list_head node;
};

#define KELVIN_TO_CELSIUS(t)    (long)(((long)t-2732 >= 0) ?    \
                                ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
#define CELSIUS_TO_KELVIN(t)    ((t)*10+2732)

#if defined(CONFIG_THERMAL_HWMON)
/* thermal zone devices with the same type share one hwmon device */
struct thermal_hwmon_device {
        char type[THERMAL_NAME_LENGTH];
        struct device *device;
        int count;
        struct list_head tz_list;
        struct list_head node;
};

struct thermal_hwmon_attr {
        struct device_attribute attr;
        char name[16];
};
#endif

struct thermal_zone_device {
        int id;
        char type[THERMAL_NAME_LENGTH];
        struct device device;
        void *devdata;
        int trips;
        struct thermal_zone_device_ops *ops;
        struct list_head cooling_devices;
        struct idr idr;
        struct mutex lock;      /* protect cooling devices list */
        struct list_head node;
#if defined(CONFIG_THERMAL_HWMON)
        struct list_head hwmon_node;
        struct thermal_hwmon_device *hwmon;
        struct thermal_hwmon_attr temp_input;   /* hwmon sys attr */
        struct thermal_hwmon_attr temp_crit;    /* hwmon sys attr */
#endif
};

struct thermal_zone_device *thermal_zone_device_register(char *, int, void *,
                                                         struct
                                                         thermal_zone_device_ops
                                                         *);
void thermal_zone_device_unregister(struct thermal_zone_device *);

int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
                                     struct thermal_cooling_device *);
int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
                                       struct thermal_cooling_device *);
struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
                                                               struct
                                                               thermal_cooling_device_ops
                                                               *);
void thermal_cooling_device_unregister(struct thermal_cooling_device *);

#endif /* __THERMAL_H__ */