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 int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *); 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 54 #define THERMAL_MAX_TRIPS 12 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 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 69 #if defined(CONFIG_THERMAL_HWMON) 70 /* thermal zone devices with the same type share one hwmon device */ 71 struct thermal_hwmon_device { 72 char type[THERMAL_NAME_LENGTH]; 73 struct device *device; 74 int count; 75 struct list_head tz_list; 76 struct list_head node; 77 }; 78 79 struct thermal_hwmon_attr { 80 struct device_attribute attr; 81 char name[16]; 82 }; 83 #endif 84 85 struct thermal_zone_device { 86 int id; 87 char type[THERMAL_NAME_LENGTH]; 88 struct device device; 89 void *devdata; 90 int trips; 91 struct thermal_zone_device_ops *ops; 92 struct list_head cooling_devices; 93 struct idr idr; 94 struct mutex lock; /* protect cooling devices list */ 95 struct list_head node; 96 #if defined(CONFIG_THERMAL_HWMON) 97 struct list_head hwmon_node; 98 struct thermal_hwmon_device *hwmon; 99 struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ 100 struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ 101 #endif 102 }; 103 104 struct thermal_zone_device *thermal_zone_device_register(char *, int, void *, 105 struct 106 thermal_zone_device_ops 107 *); 108 void thermal_zone_device_unregister(struct thermal_zone_device *); 109 110 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, 111 struct thermal_cooling_device *); 112 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int, 113 struct thermal_cooling_device *); 114 struct thermal_cooling_device *thermal_cooling_device_register(char *, void *, 115 struct 116 thermal_cooling_device_ops 117 *); 118 void thermal_cooling_device_unregister(struct thermal_cooling_device *); 119 120 #endif /* __THERMAL_H__ */ 121