sleep.c 1.0 KB

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