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 <command.h>
8 #include <console.h>
9 #include <time.h>
10 #include <vsprintf.h>
11 #include <linux/delay.h>
12 #include <linux/string.h>
13
do_sleep(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])14 static int do_sleep(struct cmd_tbl *cmdtp, int flag, int argc,
15 char *const argv[])
16 {
17 ulong start = get_timer(0);
18 ulong mdelay = 0;
19 ulong delay;
20 char *frpart;
21
22 if (argc != 2)
23 return CMD_RET_USAGE;
24
25 delay = dectoul(argv[1], NULL) * CONFIG_SYS_HZ;
26
27 frpart = strchr(argv[1], '.');
28
29 if (frpart) {
30 uint mult = CONFIG_SYS_HZ / 10;
31 for (frpart++; *frpart != '\0' && mult > 0; frpart++) {
32 if (*frpart < '0' || *frpart > '9') {
33 mdelay = 0;
34 break;
35 }
36 mdelay += (*frpart - '0') * mult;
37 mult /= 10;
38 }
39 }
40
41 delay += mdelay;
42
43 while (get_timer(start) < delay) {
44 if (ctrlc())
45 return CMD_RET_FAILURE;
46
47 udelay(100);
48 }
49
50 return 0;
51 }
52
53 U_BOOT_CMD(
54 sleep , 2, 1, do_sleep,
55 "delay execution for some time",
56 "N\n"
57 " - delay execution for N seconds (N is _decimal_ and can be\n"
58 " fractional)"
59 );
60