1 /* 2 * thermal_core.h 3 * 4 * Copyright (C) 2012 Intel Corp 5 * Author: Durgadoss R <durgadoss.r@intel.com> 6 * 7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; version 2 of the License. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, write to the Free Software Foundation, Inc., 19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 20 * 21 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 22 */ 23 24 #ifndef __THERMAL_CORE_H__ 25 #define __THERMAL_CORE_H__ 26 27 #include <linux/device.h> 28 #include <linux/thermal.h> 29 30 /* Initial state of a cooling device during binding */ 31 #define THERMAL_NO_TARGET -1UL 32 33 /* 34 * This structure is used to describe the behavior of 35 * a certain cooling device on a certain trip point 36 * in a certain thermal zone 37 */ 38 struct thermal_instance { 39 int id; 40 char name[THERMAL_NAME_LENGTH]; 41 struct thermal_zone_device *tz; 42 struct thermal_cooling_device *cdev; 43 int trip; 44 bool initialized; 45 unsigned long upper; /* Highest cooling state for this trip point */ 46 unsigned long lower; /* Lowest cooling state for this trip point */ 47 unsigned long target; /* expected cooling state */ 48 char attr_name[THERMAL_NAME_LENGTH]; 49 struct device_attribute attr; 50 char weight_attr_name[THERMAL_NAME_LENGTH]; 51 struct device_attribute weight_attr; 52 struct list_head tz_node; /* node in tz->thermal_instances */ 53 struct list_head cdev_node; /* node in cdev->thermal_instances */ 54 unsigned int weight; /* The weight of the cooling device */ 55 }; 56 57 int thermal_register_governor(struct thermal_governor *); 58 void thermal_unregister_governor(struct thermal_governor *); 59 60 #ifdef CONFIG_THERMAL_GOV_STEP_WISE 61 int thermal_gov_step_wise_register(void); 62 void thermal_gov_step_wise_unregister(void); 63 #else 64 static inline int thermal_gov_step_wise_register(void) { return 0; } 65 static inline void thermal_gov_step_wise_unregister(void) {} 66 #endif /* CONFIG_THERMAL_GOV_STEP_WISE */ 67 68 #ifdef CONFIG_THERMAL_GOV_FAIR_SHARE 69 int thermal_gov_fair_share_register(void); 70 void thermal_gov_fair_share_unregister(void); 71 #else 72 static inline int thermal_gov_fair_share_register(void) { return 0; } 73 static inline void thermal_gov_fair_share_unregister(void) {} 74 #endif /* CONFIG_THERMAL_GOV_FAIR_SHARE */ 75 76 #ifdef CONFIG_THERMAL_GOV_BANG_BANG 77 int thermal_gov_bang_bang_register(void); 78 void thermal_gov_bang_bang_unregister(void); 79 #else 80 static inline int thermal_gov_bang_bang_register(void) { return 0; } 81 static inline void thermal_gov_bang_bang_unregister(void) {} 82 #endif /* CONFIG_THERMAL_GOV_BANG_BANG */ 83 84 #ifdef CONFIG_THERMAL_GOV_USER_SPACE 85 int thermal_gov_user_space_register(void); 86 void thermal_gov_user_space_unregister(void); 87 #else 88 static inline int thermal_gov_user_space_register(void) { return 0; } 89 static inline void thermal_gov_user_space_unregister(void) {} 90 #endif /* CONFIG_THERMAL_GOV_USER_SPACE */ 91 92 #ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR 93 int thermal_gov_power_allocator_register(void); 94 void thermal_gov_power_allocator_unregister(void); 95 #else 96 static inline int thermal_gov_power_allocator_register(void) { return 0; } 97 static inline void thermal_gov_power_allocator_unregister(void) {} 98 #endif /* CONFIG_THERMAL_GOV_POWER_ALLOCATOR */ 99 100 /* device tree support */ 101 #ifdef CONFIG_THERMAL_OF 102 int of_parse_thermal_zones(void); 103 void of_thermal_destroy_zones(void); 104 int of_thermal_get_ntrips(struct thermal_zone_device *); 105 bool of_thermal_is_trip_valid(struct thermal_zone_device *, int); 106 const struct thermal_trip * 107 of_thermal_get_trip_points(struct thermal_zone_device *); 108 #else 109 static inline int of_parse_thermal_zones(void) { return 0; } 110 static inline void of_thermal_destroy_zones(void) { } 111 static inline int of_thermal_get_ntrips(struct thermal_zone_device *tz) 112 { 113 return 0; 114 } 115 static inline bool of_thermal_is_trip_valid(struct thermal_zone_device *tz, 116 int trip) 117 { 118 return false; 119 } 120 static inline const struct thermal_trip * 121 of_thermal_get_trip_points(struct thermal_zone_device *tz) 122 { 123 return NULL; 124 } 125 #endif 126 127 #endif /* __THERMAL_CORE_H__ */ 128