cmd/cls.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2018
   4  * DENX Software Engineering, Anatolij Gustschin <agust@denx.de>
   5  *
   6  * cls - clear screen command
   7  */
   8 #include <common.h>
   9 #include <command.h>
  10 #include <dm.h>
  11 #include <video.h>
  12
  13 #define CSI "\x1b["
  14
  15 static int do_video_clear(struct cmd_tbl *cmdtp, int flag, int argc,
  16                           char *const argv[])
  17 {
  18         __maybe_unused struct udevice *dev;
  19
  20         /*  Send clear screen and home */
  21         printf(CSI "2J" CSI "1;1H");
  22         if (CONFIG_IS_ENABLED(DM_VIDEO) && !CONFIG_IS_ENABLED(VIDEO_ANSI)) {
  23                 if (uclass_first_device_err(UCLASS_VIDEO, &dev))
  24                         return CMD_RET_FAILURE;
  25                 if (video_clear(dev))
  26                         return CMD_RET_FAILURE;
  27         }
  28         return CMD_RET_SUCCESS;
  29 }
  30
  31 U_BOOT_CMD(cls, 1, 1, do_video_clear, "clear screen", "");