diff options
Diffstat (limited to 'drivers/thermal/thermal_core.h')
| -rw-r--r-- | drivers/thermal/thermal_core.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h new file mode 100644 index 000000000..1571917bd --- /dev/null +++ b/drivers/thermal/thermal_core.h @@ -0,0 +1,163 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * thermal_core.h + * + * Copyright (C) 2012 Intel Corp + * Author: Durgadoss R <durgadoss.r@intel.com> + */ + +#ifndef __THERMAL_CORE_H__ +#define __THERMAL_CORE_H__ + +#include <linux/device.h> +#include <linux/thermal.h> + +#include "thermal_netlink.h" + +/* Default Thermal Governor */ +#if defined(CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE) +#define DEFAULT_THERMAL_GOVERNOR "step_wise" +#elif defined(CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE) +#define DEFAULT_THERMAL_GOVERNOR "fair_share" +#elif defined(CONFIG_THERMAL_DEFAULT_GOV_USER_SPACE) +#define DEFAULT_THERMAL_GOVERNOR "user_space" +#elif defined(CONFIG_THERMAL_DEFAULT_GOV_POWER_ALLOCATOR) +#define DEFAULT_THERMAL_GOVERNOR "power_allocator" +#endif + +/* Initial state of a cooling device during binding */ +#define THERMAL_NO_TARGET -1UL + +/* Init section thermal table */ +extern struct thermal_governor *__governor_thermal_table[]; +extern struct thermal_governor *__governor_thermal_table_end[]; + +#define THERMAL_TABLE_ENTRY(table, name) \ + static typeof(name) *__thermal_table_entry_##name \ + __used __section("__" #table "_thermal_table") = &name + +#define THERMAL_GOVERNOR_DECLARE(name) THERMAL_TABLE_ENTRY(governor, name) + +#define for_each_governor_table(__governor) \ + for (__governor = __governor_thermal_table; \ + __governor < __governor_thermal_table_end; \ + __governor++) + +int for_each_thermal_zone(int (*cb)(struct thermal_zone_device *, void *), + void *); + +int for_each_thermal_cooling_device(int (*cb)(struct thermal_cooling_device *, + void *), void *); + +int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *), + void *thermal_governor); + +struct thermal_zone_device *thermal_zone_get_by_id(int id); + +struct thermal_attr { + struct device_attribute attr; + char name[THERMAL_NAME_LENGTH]; +}; + +static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev) +{ + return cdev->ops->get_requested_power && cdev->ops->state2power && + cdev->ops->power2state; +} + +void thermal_cdev_update(struct thermal_cooling_device *); +void __thermal_cdev_update(struct thermal_cooling_device *cdev); + +int get_tz_trend(struct thermal_zone_device *tz, int trip); + +struct thermal_instance * +get_thermal_instance(struct thermal_zone_device *tz, + struct thermal_cooling_device *cdev, + int trip); + +/* + * This structure is used to describe the behavior of + * a certain cooling device on a certain trip point + * in a certain thermal zone + */ +struct thermal_instance { + int id; + char name[THERMAL_NAME_LENGTH]; + struct thermal_zone_device *tz; + struct thermal_cooling_device *cdev; + int trip; + bool initialized; + unsigned long upper; /* Highest cooling state for this trip point */ + unsigned long lower; /* Lowest cooling state for this trip point */ + unsigned long target; /* expected cooling state */ + char attr_name[THERMAL_NAME_LENGTH]; + struct device_attribute attr; + char weight_attr_name[THERMAL_NAME_LENGTH]; + struct device_attribute weight_attr; + struct list_head tz_node; /* node in tz->thermal_instances */ + struct list_head cdev_node; /* node in cdev->thermal_instances */ + unsigned int weight; /* The weight of the cooling device */ +}; + +#define to_thermal_zone(_dev) \ + container_of(_dev, struct thermal_zone_device, device) + +#define to_cooling_device(_dev) \ + container_of(_dev, struct thermal_cooling_device, device) + +int thermal_register_governor(struct thermal_governor *); +void thermal_unregister_governor(struct thermal_governor *); +int thermal_zone_device_set_policy(struct thermal_zone_device *, char *); +int thermal_build_list_of_policies(char *buf); + +/* Helpers */ +void thermal_zone_set_trips(struct thermal_zone_device *tz); +void __thermal_zone_set_trips(struct thermal_zone_device *tz); +int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp); + +/* sysfs I/F */ +int thermal_zone_create_device_groups(struct thermal_zone_device *, int); +void thermal_zone_destroy_device_groups(struct thermal_zone_device *); +void thermal_cooling_device_setup_sysfs(struct thermal_cooling_device *); +void thermal_cooling_device_destroy_sysfs(struct thermal_cooling_device *cdev); +/* used only at binding time */ +ssize_t trip_point_show(struct device *, struct device_attribute *, char *); +ssize_t weight_show(struct device *, struct device_attribute *, char *); +ssize_t weight_store(struct device *, struct device_attribute *, const char *, + size_t); + +#ifdef CONFIG_THERMAL_STATISTICS +void thermal_cooling_device_stats_update(struct thermal_cooling_device *cdev, + unsigned long new_state); +#else +static inline void +thermal_cooling_device_stats_update(struct thermal_cooling_device *cdev, + unsigned long new_state) {} +#endif /* CONFIG_THERMAL_STATISTICS */ + +/* device tree support */ +#ifdef CONFIG_THERMAL_OF +int of_thermal_get_ntrips(struct thermal_zone_device *); +bool of_thermal_is_trip_valid(struct thermal_zone_device *, int); +const struct thermal_trip * +of_thermal_get_trip_points(struct thermal_zone_device *); +#else +static inline int of_thermal_get_ntrips(struct thermal_zone_device *tz) +{ + return 0; +} +static inline bool of_thermal_is_trip_valid(struct thermal_zone_device *tz, + int trip) +{ + return false; +} +static inline const struct thermal_trip * +of_thermal_get_trip_points(struct thermal_zone_device *tz) +{ + return NULL; +} +#endif + +int thermal_zone_device_is_enabled(struct thermal_zone_device *tz); + +#endif /* __THERMAL_CORE_H__ */ |