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fb30f75655
Replace delay_ns by delay_us which is the field name used into struct cyclic_info. Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com> Reviewed-by: Stefan Roese <sr@denx.de>
107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* A general-purpose cyclic execution infrastructure, to allow "small"
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* (run-time wise) functions to be executed at a specified frequency.
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* Things like LED blinking or watchdog triggering are examples for such
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* tasks.
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*
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* Copyright (C) 2022 Stefan Roese <sr@denx.de>
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*/
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#ifndef __cyclic_h
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#define __cyclic_h
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#include <linux/list.h>
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#include <asm/types.h>
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#include <u-boot/schedule.h> // to be removed later
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/**
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* struct cyclic_info - Information about cyclic execution function
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*
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* @func: Function to call periodically
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* @name: Name of the cyclic function, e.g. shown in the commands
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* @delay_us: Delay is us after which this function shall get executed
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* @start_time_us: Start time in us, when this function started its execution
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* @cpu_time_us: Total CPU time of this function
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* @run_cnt: Counter of executions occurances
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* @next_call: Next time in us, when the function shall be executed again
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* @list: List node
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* @already_warned: Flag that we've warned about exceeding CPU time usage
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*
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* When !CONFIG_CYCLIC, this struct is empty.
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*/
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struct cyclic_info {
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#if defined(CONFIG_CYCLIC)
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void (*func)(struct cyclic_info *c);
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const char *name;
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uint64_t delay_us;
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uint64_t start_time_us;
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uint64_t cpu_time_us;
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uint64_t run_cnt;
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uint64_t next_call;
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struct hlist_node list;
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bool already_warned;
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#endif
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};
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/** Function type for cyclic functions */
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typedef void (*cyclic_func_t)(struct cyclic_info *c);
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#if CONFIG_IS_ENABLED(CYCLIC)
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/**
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* cyclic_register - Register a new cyclic function
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*
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* @cyclic: Cyclic info structure
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* @func: Function to call periodically
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* @delay_us: Delay is us after which this function shall get executed
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* @name: Cyclic function name/id
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*
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* The function @func will be called with @cyclic as its
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* argument. @cyclic will usually be embedded in some device-specific
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* structure, which the callback can retrieve using container_of().
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*/
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void cyclic_register(struct cyclic_info *cyclic, cyclic_func_t func,
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uint64_t delay_us, const char *name);
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/**
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* cyclic_unregister - Unregister a cyclic function
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*
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* @cyclic: Pointer to cyclic_struct of the function that shall be removed
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*/
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void cyclic_unregister(struct cyclic_info *cyclic);
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/**
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* cyclic_unregister_all() - Clean up cyclic functions
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*
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* This removes all cyclic functions
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*/
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int cyclic_unregister_all(void);
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/**
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* cyclic_get_list() - Get cyclic list pointer
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*
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* Return the cyclic list pointer
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*
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* @return: pointer to cyclic_list
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*/
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struct hlist_head *cyclic_get_list(void);
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#else
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static inline void cyclic_register(struct cyclic_info *cyclic, cyclic_func_t func,
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uint64_t delay_us, const char *name)
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{
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}
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static inline void cyclic_unregister(struct cyclic_info *cyclic)
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{
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}
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static inline int cyclic_unregister_all(void)
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{
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return 0;
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}
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#endif /* CYCLIC */
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#endif
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