forked from Minki/linux
980af75ede
Currently the governors are declared in their respective files but they export their [un]register functions which in turn call the [un]register governors core's functions. That implies a cyclic dependency which is not desirable. There is a way to self-encapsulate the governors by letting them to declare themselves in a __init section table. Define the table in the asm generic linker description like the other tables and provide the specific macros to deal with. Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
160 lines
5.5 KiB
C
160 lines
5.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* thermal_core.h
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*
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* Copyright (C) 2012 Intel Corp
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* Author: Durgadoss R <durgadoss.r@intel.com>
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*/
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#ifndef __THERMAL_CORE_H__
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#define __THERMAL_CORE_H__
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#include <linux/device.h>
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#include <linux/thermal.h>
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/* Initial state of a cooling device during binding */
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#define THERMAL_NO_TARGET -1UL
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/* Init section thermal table */
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extern struct thermal_governor *__governor_thermal_table[];
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extern struct thermal_governor *__governor_thermal_table_end[];
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#define THERMAL_TABLE_ENTRY(table, name) \
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static typeof(name) *__thermal_table_entry_##name \
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__used __section(__##table##_thermal_table) = &name
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#define THERMAL_GOVERNOR_DECLARE(name) THERMAL_TABLE_ENTRY(governor, name)
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#define for_each_governor_table(__governor) \
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for (__governor = __governor_thermal_table; \
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__governor < __governor_thermal_table_end; \
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__governor++)
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/*
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* This structure is used to describe the behavior of
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* a certain cooling device on a certain trip point
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* in a certain thermal zone
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*/
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struct thermal_instance {
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int id;
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char name[THERMAL_NAME_LENGTH];
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struct thermal_zone_device *tz;
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struct thermal_cooling_device *cdev;
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int trip;
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bool initialized;
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unsigned long upper; /* Highest cooling state for this trip point */
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unsigned long lower; /* Lowest cooling state for this trip point */
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unsigned long target; /* expected cooling state */
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char attr_name[THERMAL_NAME_LENGTH];
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struct device_attribute attr;
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char weight_attr_name[THERMAL_NAME_LENGTH];
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struct device_attribute weight_attr;
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struct list_head tz_node; /* node in tz->thermal_instances */
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struct list_head cdev_node; /* node in cdev->thermal_instances */
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unsigned int weight; /* The weight of the cooling device */
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};
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#define to_thermal_zone(_dev) \
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container_of(_dev, struct thermal_zone_device, device)
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#define to_cooling_device(_dev) \
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container_of(_dev, struct thermal_cooling_device, device)
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int thermal_register_governor(struct thermal_governor *);
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void thermal_unregister_governor(struct thermal_governor *);
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void thermal_zone_device_rebind_exception(struct thermal_zone_device *,
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const char *, size_t);
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void thermal_zone_device_unbind_exception(struct thermal_zone_device *,
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const char *, size_t);
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int thermal_zone_device_set_policy(struct thermal_zone_device *, char *);
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int thermal_build_list_of_policies(char *buf);
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/* sysfs I/F */
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int thermal_zone_create_device_groups(struct thermal_zone_device *, int);
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void thermal_zone_destroy_device_groups(struct thermal_zone_device *);
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void thermal_cooling_device_setup_sysfs(struct thermal_cooling_device *);
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void thermal_cooling_device_destroy_sysfs(struct thermal_cooling_device *cdev);
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/* used only at binding time */
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ssize_t trip_point_show(struct device *, struct device_attribute *, char *);
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ssize_t weight_show(struct device *, struct device_attribute *, char *);
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ssize_t weight_store(struct device *, struct device_attribute *, const char *,
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size_t);
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#ifdef CONFIG_THERMAL_STATISTICS
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void thermal_cooling_device_stats_update(struct thermal_cooling_device *cdev,
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unsigned long new_state);
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#else
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static inline void
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thermal_cooling_device_stats_update(struct thermal_cooling_device *cdev,
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unsigned long new_state) {}
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#endif /* CONFIG_THERMAL_STATISTICS */
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#ifdef CONFIG_THERMAL_GOV_STEP_WISE
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int thermal_gov_step_wise_register(void);
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void thermal_gov_step_wise_unregister(void);
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#else
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static inline int thermal_gov_step_wise_register(void) { return 0; }
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static inline void thermal_gov_step_wise_unregister(void) {}
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#endif /* CONFIG_THERMAL_GOV_STEP_WISE */
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#ifdef CONFIG_THERMAL_GOV_FAIR_SHARE
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int thermal_gov_fair_share_register(void);
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void thermal_gov_fair_share_unregister(void);
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#else
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static inline int thermal_gov_fair_share_register(void) { return 0; }
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static inline void thermal_gov_fair_share_unregister(void) {}
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#endif /* CONFIG_THERMAL_GOV_FAIR_SHARE */
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#ifdef CONFIG_THERMAL_GOV_BANG_BANG
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int thermal_gov_bang_bang_register(void);
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void thermal_gov_bang_bang_unregister(void);
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#else
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static inline int thermal_gov_bang_bang_register(void) { return 0; }
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static inline void thermal_gov_bang_bang_unregister(void) {}
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#endif /* CONFIG_THERMAL_GOV_BANG_BANG */
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#ifdef CONFIG_THERMAL_GOV_USER_SPACE
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int thermal_gov_user_space_register(void);
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void thermal_gov_user_space_unregister(void);
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#else
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static inline int thermal_gov_user_space_register(void) { return 0; }
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static inline void thermal_gov_user_space_unregister(void) {}
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#endif /* CONFIG_THERMAL_GOV_USER_SPACE */
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#ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
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int thermal_gov_power_allocator_register(void);
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void thermal_gov_power_allocator_unregister(void);
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#else
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static inline int thermal_gov_power_allocator_register(void) { return 0; }
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static inline void thermal_gov_power_allocator_unregister(void) {}
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#endif /* CONFIG_THERMAL_GOV_POWER_ALLOCATOR */
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/* device tree support */
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#ifdef CONFIG_THERMAL_OF
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int of_parse_thermal_zones(void);
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void of_thermal_destroy_zones(void);
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int of_thermal_get_ntrips(struct thermal_zone_device *);
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bool of_thermal_is_trip_valid(struct thermal_zone_device *, int);
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const struct thermal_trip *
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of_thermal_get_trip_points(struct thermal_zone_device *);
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#else
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static inline int of_parse_thermal_zones(void) { return 0; }
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static inline void of_thermal_destroy_zones(void) { }
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static inline int of_thermal_get_ntrips(struct thermal_zone_device *tz)
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{
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return 0;
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}
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static inline bool of_thermal_is_trip_valid(struct thermal_zone_device *tz,
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int trip)
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{
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return false;
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}
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static inline const struct thermal_trip *
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of_thermal_get_trip_points(struct thermal_zone_device *tz)
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{
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return NULL;
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}
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#endif
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#endif /* __THERMAL_CORE_H__ */
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