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 */ 38struct 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 57int thermal_register_governor(struct thermal_governor *); 58void thermal_unregister_governor(struct thermal_governor *); 59 60#ifdef CONFIG_THERMAL_GOV_STEP_WISE 61int thermal_gov_step_wise_register(void); 62void thermal_gov_step_wise_unregister(void); 63#else 64static inline int thermal_gov_step_wise_register(void) { return 0; } 65static inline void thermal_gov_step_wise_unregister(void) {} 66#endif /* CONFIG_THERMAL_GOV_STEP_WISE */ 67 68#ifdef CONFIG_THERMAL_GOV_FAIR_SHARE 69int thermal_gov_fair_share_register(void); 70void thermal_gov_fair_share_unregister(void); 71#else 72static inline int thermal_gov_fair_share_register(void) { return 0; } 73static inline void thermal_gov_fair_share_unregister(void) {} 74#endif /* CONFIG_THERMAL_GOV_FAIR_SHARE */ 75 76#ifdef CONFIG_THERMAL_GOV_BANG_BANG 77int thermal_gov_bang_bang_register(void); 78void thermal_gov_bang_bang_unregister(void); 79#else 80static inline int thermal_gov_bang_bang_register(void) { return 0; } 81static inline void thermal_gov_bang_bang_unregister(void) {} 82#endif /* CONFIG_THERMAL_GOV_BANG_BANG */ 83 84#ifdef CONFIG_THERMAL_GOV_USER_SPACE 85int thermal_gov_user_space_register(void); 86void thermal_gov_user_space_unregister(void); 87#else 88static inline int thermal_gov_user_space_register(void) { return 0; } 89static inline void thermal_gov_user_space_unregister(void) {} 90#endif /* CONFIG_THERMAL_GOV_USER_SPACE */ 91 92#ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR 93int thermal_gov_power_allocator_register(void); 94void thermal_gov_power_allocator_unregister(void); 95#else 96static inline int thermal_gov_power_allocator_register(void) { return 0; } 97static 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 102int of_parse_thermal_zones(void); 103void of_thermal_destroy_zones(void); 104int of_thermal_get_ntrips(struct thermal_zone_device *); 105bool of_thermal_is_trip_valid(struct thermal_zone_device *, int); 106const struct thermal_trip * 107of_thermal_get_trip_points(struct thermal_zone_device *); 108#else 109static inline int of_parse_thermal_zones(void) { return 0; } 110static inline void of_thermal_destroy_zones(void) { } 111static inline int of_thermal_get_ntrips(struct thermal_zone_device *tz) 112{ 113 return 0; 114} 115static inline bool of_thermal_is_trip_valid(struct thermal_zone_device *tz, 116 int trip) 117{ 118 return false; 119} 120static inline const struct thermal_trip * 121of_thermal_get_trip_points(struct thermal_zone_device *tz) 122{ 123 return NULL; 124} 125#endif 126 127#endif /* __THERMAL_CORE_H__ */ 128