cmd: add clear screen 'cls' command

Add common clear screen command for configurations
CONFIG_DM_VIDEO, CONFIG_LCD and CONFIG_CFB_CONSOLE.

Remove the existing cls command implementation from
lcd.c code and activate the command for all boards
enabling CONFIG_LCD for compatibility reasons.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Patrick.Delaunay <patrick.delaunay@free.fr>

1 files changed, 35 insertions, 0 deletions

diff --git a/cmd/cls.c b/cmd/cls.c
new file mode 100644
index 00000000000..f1ce6e8df1e
--- /dev/null
+++ b/cmd/cls.c
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2018
+ * DENX Software Engineering, Anatolij Gustschin <agust@denx.de>
+ *
+ * cls - clear screen command
+ */
+#include <common.h>
+#include <command.h>
+#include <dm.h>
+#include <lcd.h>
+#include <video.h>
+
+static int do_video_clear(cmd_tbl_t *cmdtp, int flag, int argc,
+			  char *const argv[])
+{
+#if defined(CONFIG_DM_VIDEO)
+	struct udevice *dev;
+
+	if (uclass_first_device_err(UCLASS_VIDEO, &dev))
+		return CMD_RET_FAILURE;
+
+	if (video_clear(dev))
+		return CMD_RET_FAILURE;
+#elif defined(CONFIG_CFB_CONSOLE)
+	video_clear();
+#elif defined(CONFIG_LCD)
+	lcd_clear();
+#else
+	return CMD_RET_FAILURE;
+#endif
+	return CMD_RET_SUCCESS;
+}
+
+U_BOOT_CMD(cls,	1, 1, do_video_clear, "clear screen", "");