/* * 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, }; 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 (*get_crit_temp) (struct thermal_zone_device *, unsigned long *); 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_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; int tc1; int tc2; int passive_delay; int polling_delay; int last_temperature; bool passive; unsigned int forced_passive; 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; struct delayed_work poll_queue; #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 *, int tc1, int tc2, int passive_freq, int polling_freq); 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 *); void thermal_zone_device_update(struct thermal_zone_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__ */