LXR uboot/cmd/sleep.c

   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