1 /* 2 * thermal.h ($Revision: 0 $) 3 * 4 * Copyright (C) 2008 Intel Corp 5 * Copyright (C) 2008 Zhang Rui <[email protected]> 6 * Copyright (C) 2008 Sujith Thomas <[email protected]> 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 #include <linux/workqueue.h> 31 32 struct thermal_zone_device; 33 struct thermal_cooling_device; 34 35 enum thermal_device_mode { 36 THERMAL_DEVICE_DISABLED = 0, 37 THERMAL_DEVICE_ENABLED, 38 }; 39 40 enum thermal_trip_type { 41 THERMAL_TRIP_ACTIVE = 0, 42 THERMAL_TRIP_PASSIVE, 43 THERMAL_TRIP_HOT, 44 THERMAL_TRIP_CRITICAL, 45 }; 46 47 struct thermal_zone_device_ops { 48 int (*bind) (struct thermal_zone_device *, 49 struct thermal_cooling_device *); 50 int (*unbind) (struct thermal_zone_device *, 51 struct thermal_cooling_device *); 52 int (*get_temp) (struct thermal_zone_device *, unsigned long *); 53 int (*get_mode) (struct thermal_zone_device *, 54 enum thermal_device_mode *); 55 int (*set_mode) (struct thermal_zone_device *, 56 enum thermal_device_mode); 57 int (*get_trip_type) (struct thermal_zone_device *, int, 58 enum thermal_trip_type *); 59 int (*get_trip_temp) (struct thermal_zone_device *, int, 60 unsigned long *); 61 int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *); 62 int (*notify) (struct thermal_zone_device *, int, 63 enum thermal_trip_type); 64 }; 65 66 struct thermal_cooling_device_ops { 67 int (*get_max_state) (struct thermal_cooling_device *, unsigned long *); 68 int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *); 69 int (*set_cur_state) (struct thermal_cooling_device *, unsigned long); 70 }; 71 72 #define THERMAL_TRIPS_NONE -1 73 #define THERMAL_MAX_TRIPS 12 74 #define THERMAL_NAME_LENGTH 20 75 struct thermal_cooling_device { 76 int id; 77 char type[THERMAL_NAME_LENGTH]; 78 struct device device; 79 void *devdata; 80 struct thermal_cooling_device_ops *ops; 81 struct list_head node; 82 }; 83 84 #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \ 85 ((long)t-2732+5)/10 : ((long)t-2732-5)/10) 86 #define CELSIUS_TO_KELVIN(t) ((t)*10+2732) 87 88 #if defined(CONFIG_THERMAL_HWMON) 89 /* thermal zone devices with the same type share one hwmon device */ 90 struct thermal_hwmon_device { 91 char type[THERMAL_NAME_LENGTH]; 92 struct device *device; 93 int count; 94 struct list_head tz_list; 95 struct list_head node; 96 }; 97 98 struct thermal_hwmon_attr { 99 struct device_attribute attr; 100 char name[16]; 101 }; 102 #endif 103 104 struct thermal_zone_device { 105 int id; 106 char type[THERMAL_NAME_LENGTH]; 107 struct device device; 108 void *devdata; 109 int trips; 110 int tc1; 111 int tc2; 112 int passive_delay; 113 int polling_delay; 114 int last_temperature; 115 bool passive; 116 unsigned int forced_passive; 117 struct thermal_zone_device_ops *ops; 118 struct list_head cooling_devices; 119 struct idr idr; 120 struct mutex lock; /* protect cooling devices list */ 121 struct list_head node; 122 struct delayed_work poll_queue; 123 #if defined(CONFIG_THERMAL_HWMON) 124 struct list_head hwmon_node; 125 struct thermal_hwmon_device *hwmon; 126 struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ 127 struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ 128 #endif 129 }; 130 131 struct thermal_zone_device *thermal_zone_device_register(char *, int, void *, 132 struct 133 thermal_zone_device_ops 134 *, int tc1, int tc2, 135 int passive_freq, 136 int polling_freq); 137 void thermal_zone_device_unregister(struct thermal_zone_device *); 138 139 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, 140 struct thermal_cooling_device *); 141 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int, 142 struct thermal_cooling_device *); 143 void thermal_zone_device_update(struct thermal_zone_device *); 144 struct thermal_cooling_device *thermal_cooling_device_register(char *, void *, 145 struct 146 thermal_cooling_device_ops 147 *); 148 void thermal_cooling_device_unregister(struct thermal_cooling_device *); 149 150 #endif /* __THERMAL_H__ */ 151