blob: 946f1d78184d2cb5276723d62303f4f2628560a5 [file] [log] [blame]
Stefan Roese1f865ee2022-09-02 13:57:51 +02001// SPDX-License-Identifier: GPL-2.0+
2/*
3 * A general-purpose cyclic execution infrastructure, to allow "small"
4 * (run-time wise) functions to be executed at a specified frequency.
5 * Things like LED blinking or watchdog triggering are examples for such
6 * tasks.
7 *
8 * Copyright (C) 2022 Stefan Roese <sr@denx.de>
9 */
10
11#include <common.h>
12#include <command.h>
13#include <cyclic.h>
14#include <div64.h>
15#include <malloc.h>
16#include <linux/delay.h>
17
18struct cyclic_demo_info {
19 uint delay_us;
20};
21
22static void cyclic_demo(void *ctx)
23{
24 struct cyclic_demo_info *info = ctx;
25
26 /* Just a small dummy delay here */
27 udelay(info->delay_us);
28}
29
30static int do_cyclic_demo(struct cmd_tbl *cmdtp, int flag, int argc,
31 char *const argv[])
32{
33 struct cyclic_demo_info *info;
34 struct cyclic_info *cyclic;
35 uint time_ms;
36
37 if (argc < 3)
38 return CMD_RET_USAGE;
39
40 info = malloc(sizeof(struct cyclic_demo_info));
41 if (!info) {
42 printf("out of memory\n");
43 return CMD_RET_FAILURE;
44 }
45
46 time_ms = simple_strtoul(argv[1], NULL, 0);
47 info->delay_us = simple_strtoul(argv[2], NULL, 0);
48
49 /* Register demo cyclic function */
50 cyclic = cyclic_register(cyclic_demo, time_ms * 1000, "cyclic_demo",
51 info);
52 if (!cyclic)
53 printf("Registering of cyclic_demo failed\n");
54
55 printf("Registered function \"%s\" to be executed all %dms\n",
56 "cyclic_demo", time_ms);
57
58 return 0;
59}
60
61static int do_cyclic_list(struct cmd_tbl *cmdtp, int flag, int argc,
62 char *const argv[])
63{
Rasmus Villemoes28968392022-10-28 13:50:53 +020064 struct cyclic_info *cyclic;
65 struct hlist_node *tmp;
Stefan Roese1f865ee2022-09-02 13:57:51 +020066 u64 cnt, freq;
67
Rasmus Villemoes28968392022-10-28 13:50:53 +020068 hlist_for_each_entry_safe(cyclic, tmp, cyclic_get_list(), list) {
Stefan Roese1f865ee2022-09-02 13:57:51 +020069 cnt = cyclic->run_cnt * 1000000ULL * 100ULL;
70 freq = lldiv(cnt, timer_get_us() - cyclic->start_time_us);
71 printf("function: %s, cpu-time: %lld us, frequency: %lld.%02d times/s\n",
72 cyclic->name, cyclic->cpu_time_us,
73 lldiv(freq, 100), do_div(freq, 100));
74 }
75
76 return 0;
77}
78
79static char cyclic_help_text[] =
Alexander Dahl8ba4eae2023-08-04 17:53:23 +020080 "demo <cycletime_ms> <delay_us> - register cyclic demo function\n"
Stefan Roese1f865ee2022-09-02 13:57:51 +020081 "cyclic list - list cyclic functions\n";
82
83U_BOOT_CMD_WITH_SUBCMDS(cyclic, "Cyclic", cyclic_help_text,
84 U_BOOT_SUBCMD_MKENT(demo, 3, 1, do_cyclic_demo),
85 U_BOOT_SUBCMD_MKENT(list, 1, 1, do_cyclic_list));