[linux-block.git] / include / linux / thermal.h

/*
 *  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_HWMON) ||	\
	(defined(CONFIG_HWMON_MODULE) && defined(CONFIG_THERMAL_MODULE))
/* 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_HWMON) ||	\
	(defined(CONFIG_HWMON_MODULE) && defined(CONFIG_THERMAL_MODULE))
	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__ */
Commit	Line	Data
203d3d4a ZR	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 *);
9ec732ff	44	int (get_crit_temp) (struct thermal_zone_device , unsigned long *);
203d3d4a ZR	45	};
	46
	47	struct 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
5f1a3f2a	54	#define THERMAL_MAX_TRIPS 12
203d3d4a ZR	55	#define THERMAL_NAME_LENGTH 20
	56	struct 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
041d4bbf ZR	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
e68b16ab ZR	69	#if defined(CONFIG_HWMON) \|\| \
	70	(defined(CONFIG_HWMON_MODULE) && defined(CONFIG_THERMAL_MODULE))
	71	/* thermal zone devices with the same type share one hwmon device */
	72	struct thermal_hwmon_device {
	73	char type[THERMAL_NAME_LENGTH];
	74	struct device *device;
	75	int count;
	76	struct list_head tz_list;
	77	struct list_head node;
	78	};
	79
	80	struct thermal_hwmon_attr {
	81	struct device_attribute attr;
	82	char name[16];
	83	};
	84	#endif
	85
203d3d4a ZR	86	struct thermal_zone_device {
	87	int id;
	88	char type[THERMAL_NAME_LENGTH];
	89	struct device device;
	90	void *devdata;
	91	int trips;
	92	struct thermal_zone_device_ops *ops;
	93	struct list_head cooling_devices;
	94	struct idr idr;
	95	struct mutex lock; /* protect cooling devices list */
	96	struct list_head node;
e68b16ab ZR	97	#if defined(CONFIG_HWMON) \|\| \
	98	(defined(CONFIG_HWMON_MODULE) && defined(CONFIG_THERMAL_MODULE))
	99	struct list_head hwmon_node;
	100	struct thermal_hwmon_device *hwmon;
	101	struct thermal_hwmon_attr temp_input; /* hwmon sys attr */
	102	struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */
	103	#endif
203d3d4a ZR	104	};
	105
	106	struct thermal_zone_device thermal_zone_device_register(char , int, void *,
a0dd25b2 LB	107	struct
	108	thermal_zone_device_ops
	109	*);
203d3d4a ZR	110	void thermal_zone_device_unregister(struct thermal_zone_device *);
	111
	112	int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
	113	struct thermal_cooling_device *);
	114	int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
	115	struct thermal_cooling_device *);
203d3d4a	116	struct thermal_cooling_device thermal_cooling_device_register(char , void *,
a0dd25b2 LB	117	struct
	118	thermal_cooling_device_ops
	119	*);
203d3d4a ZR	120	void thermal_cooling_device_unregister(struct thermal_cooling_device *);
203d3d4a ZR	121
a0dd25b2	122	#endif /* __THERMAL_H__ */