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 unsigned long upper; /* Highest cooling state for this trip point */ 45 unsigned long lower; /* Lowest cooling state for this trip point */ 46 unsigned long target; /* expected cooling state */ 47 char attr_name[THERMAL_NAME_LENGTH]; 48 struct device_attribute attr; 49 char weight_attr_name[THERMAL_NAME_LENGTH]; 50 struct device_attribute weight_attr; 51 struct list_head tz_node; /* node in tz->thermal_instances */ 52 struct list_head cdev_node; /* node in cdev->thermal_instances */ 53 unsigned int weight; /* The weight of the cooling device */ 54 }; 55 56 int thermal_register_governor(struct thermal_governor *); 57 void thermal_unregister_governor(struct thermal_governor *); 58 59 #ifdef CONFIG_THERMAL_GOV_STEP_WISE 60 int thermal_gov_step_wise_register(void); 61 void thermal_gov_step_wise_unregister(void); 62 #else 63 static inline int thermal_gov_step_wise_register(void) { return 0; } 64 static inline void thermal_gov_step_wise_unregister(void) {} 65 #endif /* CONFIG_THERMAL_GOV_STEP_WISE */ 66 67 #ifdef CONFIG_THERMAL_GOV_FAIR_SHARE 68 int thermal_gov_fair_share_register(void); 69 void thermal_gov_fair_share_unregister(void); 70 #else 71 static inline int thermal_gov_fair_share_register(void) { return 0; } 72 static inline void thermal_gov_fair_share_unregister(void) {} 73 #endif /* CONFIG_THERMAL_GOV_FAIR_SHARE */ 74 75 #ifdef CONFIG_THERMAL_GOV_BANG_BANG 76 int thermal_gov_bang_bang_register(void); 77 void thermal_gov_bang_bang_unregister(void); 78 #else 79 static inline int thermal_gov_bang_bang_register(void) { return 0; } 80 static inline void thermal_gov_bang_bang_unregister(void) {} 81 #endif /* CONFIG_THERMAL_GOV_BANG_BANG */ 82 83 #ifdef CONFIG_THERMAL_GOV_USER_SPACE 84 int thermal_gov_user_space_register(void); 85 void thermal_gov_user_space_unregister(void); 86 #else 87 static inline int thermal_gov_user_space_register(void) { return 0; } 88 static inline void thermal_gov_user_space_unregister(void) {} 89 #endif /* CONFIG_THERMAL_GOV_USER_SPACE */ 90 91 #ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR 92 int thermal_gov_power_allocator_register(void); 93 void thermal_gov_power_allocator_unregister(void); 94 #else 95 static inline int thermal_gov_power_allocator_register(void) { return 0; } 96 static inline void thermal_gov_power_allocator_unregister(void) {} 97 #endif /* CONFIG_THERMAL_GOV_POWER_ALLOCATOR */ 98 99 /* device tree support */ 100 #ifdef CONFIG_THERMAL_OF 101 int of_parse_thermal_zones(void); 102 void of_thermal_destroy_zones(void); 103 int of_thermal_get_ntrips(struct thermal_zone_device *); 104 bool of_thermal_is_trip_valid(struct thermal_zone_device *, int); 105 const struct thermal_trip * 106 of_thermal_get_trip_points(struct thermal_zone_device *); 107 #else 108 static inline int of_parse_thermal_zones(void) { return 0; } 109 static inline void of_thermal_destroy_zones(void) { } 110 static inline int of_thermal_get_ntrips(struct thermal_zone_device *tz) 111 { 112 return 0; 113 } 114 static inline bool of_thermal_is_trip_valid(struct thermal_zone_device *tz, 115 int trip) 116 { 117 return false; 118 } 119 static inline const struct thermal_trip * 120 of_thermal_get_trip_points(struct thermal_zone_device *tz) 121 { 122 return NULL; 123 } 124 #endif 125 126 #endif /* __THERMAL_CORE_H__ */ 127