![Zhang Rui](/assets/img/avatar_default.png)
we need to go over all the thermal_instance list of a cooling device to decide which cooling state to put the cooling device to. But at this time, as a cooling device may be referenced in multiple thermal zones, we need to lock the list first in case another thermal zone is updating this cooling device. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Reviewed-by: Rafael J. Wysocki <rjw@sisk.pl> Reviewed-by: Eduardo Valentin <eduardo.valentin@ti.com>
190 lines
5.9 KiB
C
190 lines
5.9 KiB
C
/*
|
|
* 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>
|
|
#include <linux/workqueue.h>
|
|
|
|
struct thermal_zone_device;
|
|
struct thermal_cooling_device;
|
|
|
|
enum thermal_device_mode {
|
|
THERMAL_DEVICE_DISABLED = 0,
|
|
THERMAL_DEVICE_ENABLED,
|
|
};
|
|
|
|
enum thermal_trip_type {
|
|
THERMAL_TRIP_ACTIVE = 0,
|
|
THERMAL_TRIP_PASSIVE,
|
|
THERMAL_TRIP_HOT,
|
|
THERMAL_TRIP_CRITICAL,
|
|
};
|
|
|
|
enum thermal_trend {
|
|
THERMAL_TREND_STABLE, /* temperature is stable */
|
|
THERMAL_TREND_RAISING, /* temperature is raising */
|
|
THERMAL_TREND_DROPPING, /* temperature is dropping */
|
|
};
|
|
|
|
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 *, unsigned long *);
|
|
int (*get_mode) (struct thermal_zone_device *,
|
|
enum thermal_device_mode *);
|
|
int (*set_mode) (struct thermal_zone_device *,
|
|
enum thermal_device_mode);
|
|
int (*get_trip_type) (struct thermal_zone_device *, int,
|
|
enum thermal_trip_type *);
|
|
int (*get_trip_temp) (struct thermal_zone_device *, int,
|
|
unsigned long *);
|
|
int (*set_trip_temp) (struct thermal_zone_device *, int,
|
|
unsigned long);
|
|
int (*get_trip_hyst) (struct thermal_zone_device *, int,
|
|
unsigned long *);
|
|
int (*set_trip_hyst) (struct thermal_zone_device *, int,
|
|
unsigned long);
|
|
int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
|
|
int (*get_trend) (struct thermal_zone_device *, int,
|
|
enum thermal_trend *);
|
|
int (*notify) (struct thermal_zone_device *, int,
|
|
enum thermal_trip_type);
|
|
};
|
|
|
|
struct thermal_cooling_device_ops {
|
|
int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
|
|
int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
|
|
int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
|
|
};
|
|
|
|
#define THERMAL_NO_LIMIT -1UL /* no upper/lower limit requirement */
|
|
|
|
#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;
|
|
const struct thermal_cooling_device_ops *ops;
|
|
bool updated; /* true if the cooling device does not need update */
|
|
struct mutex lock; /* protect thermal_instances list */
|
|
struct list_head thermal_instances;
|
|
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)
|
|
|
|
struct thermal_attr {
|
|
struct device_attribute attr;
|
|
char name[THERMAL_NAME_LENGTH];
|
|
};
|
|
|
|
struct thermal_zone_device {
|
|
int id;
|
|
char type[THERMAL_NAME_LENGTH];
|
|
struct device device;
|
|
struct thermal_attr *trip_temp_attrs;
|
|
struct thermal_attr *trip_type_attrs;
|
|
struct thermal_attr *trip_hyst_attrs;
|
|
void *devdata;
|
|
int trips;
|
|
int passive_delay;
|
|
int polling_delay;
|
|
int temperature;
|
|
int last_temperature;
|
|
int passive;
|
|
unsigned int forced_passive;
|
|
const struct thermal_zone_device_ops *ops;
|
|
struct list_head thermal_instances;
|
|
struct idr idr;
|
|
struct mutex lock; /* protect thermal_instances list */
|
|
struct list_head node;
|
|
struct delayed_work poll_queue;
|
|
};
|
|
/* Adding event notification support elements */
|
|
#define THERMAL_GENL_FAMILY_NAME "thermal_event"
|
|
#define THERMAL_GENL_VERSION 0x01
|
|
#define THERMAL_GENL_MCAST_GROUP_NAME "thermal_mc_group"
|
|
|
|
enum events {
|
|
THERMAL_AUX0,
|
|
THERMAL_AUX1,
|
|
THERMAL_CRITICAL,
|
|
THERMAL_DEV_FAULT,
|
|
};
|
|
|
|
struct thermal_genl_event {
|
|
u32 orig;
|
|
enum events event;
|
|
};
|
|
/* attributes of thermal_genl_family */
|
|
enum {
|
|
THERMAL_GENL_ATTR_UNSPEC,
|
|
THERMAL_GENL_ATTR_EVENT,
|
|
__THERMAL_GENL_ATTR_MAX,
|
|
};
|
|
#define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1)
|
|
|
|
/* commands supported by the thermal_genl_family */
|
|
enum {
|
|
THERMAL_GENL_CMD_UNSPEC,
|
|
THERMAL_GENL_CMD_EVENT,
|
|
__THERMAL_GENL_CMD_MAX,
|
|
};
|
|
#define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)
|
|
|
|
struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,
|
|
void *, const struct thermal_zone_device_ops *, int, int);
|
|
void thermal_zone_device_unregister(struct thermal_zone_device *);
|
|
|
|
int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
|
|
struct thermal_cooling_device *,
|
|
unsigned long, unsigned long);
|
|
int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
|
|
struct thermal_cooling_device *);
|
|
void thermal_zone_device_update(struct thermal_zone_device *);
|
|
struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
|
|
const struct thermal_cooling_device_ops *);
|
|
void thermal_cooling_device_unregister(struct thermal_cooling_device *);
|
|
|
|
#ifdef CONFIG_NET
|
|
extern int thermal_generate_netlink_event(u32 orig, enum events event);
|
|
#else
|
|
static inline int thermal_generate_netlink_event(u32 orig, enum events event)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#endif /* __THERMAL_H__ */
|