1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2001
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 */
6
7#include <common.h>
8#include <command.h>
9#include <console.h>
10#include <linux/delay.h>
11
12static int do_sleep(struct cmd_tbl *cmdtp, int flag, int argc,
13		    char *const argv[])
14{
15	ulong start = get_timer(0);
16	ulong mdelay = 0;
17	ulong delay;
18	char *frpart;
19
20	if (argc != 2)
21		return CMD_RET_USAGE;
22
23	delay = dectoul(argv[1], NULL) * CONFIG_SYS_HZ;
24
25	frpart = strchr(argv[1], '.');
26
27	if (frpart) {
28		uint mult = CONFIG_SYS_HZ / 10;
29		for (frpart++; *frpart != '\0' && mult > 0; frpart++) {
30			if (*frpart < '0' || *frpart > '9') {
31				mdelay = 0;
32				break;
33			}
34			mdelay += (*frpart - '0') * mult;
35			mult /= 10;
36		}
37	}
38
39	delay += mdelay;
40
41	while (get_timer(start) < delay) {
42		if (ctrlc())
43			return CMD_RET_FAILURE;
44
45		udelay(100);
46	}
47
48	return 0;
49}
50
51U_BOOT_CMD(
52	sleep ,    2,    1,     do_sleep,
53	"delay execution for some time",
54	"N\n"
55	"    - delay execution for N seconds (N is _decimal_ and can be\n"
56	"      fractional)"
57);
58