From 4e92e60d35d5ef3a3f7ca9cdd24aa51a1a3263a7 Mon Sep 17 00:00:00 2001
From: Anatolij Gustschin <agust@denx.de>
Date: Sat, 1 Dec 2018 10:47:20 +0100
Subject: 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>
---
 cmd/Kconfig  |  8 ++++++++
 cmd/Makefile |  1 +
 cmd/cls.c    | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 44 insertions(+)
 create mode 100644 cmd/cls.c

(limited to 'cmd')

diff --git a/cmd/Kconfig b/cmd/Kconfig
index e2973b3..b1cd1c9 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1380,6 +1380,14 @@ config CMD_CONITRACE
 	  Enable the 'conitrace' command which displays the codes received
 	  from the console input as hexadecimal numbers.
 
+config CMD_CLS
+	bool "Enable clear screen command 'cls'"
+	depends on CFB_CONSOLE || DM_VIDEO || LCD || VIDEO
+	default y if LCD
+	help
+	  Enable the 'cls' command which clears the screen contents
+	  on video frame buffer.
+
 config CMD_DISPLAY
 	bool "Enable the 'display' command, for character displays"
 	help
diff --git a/cmd/Makefile b/cmd/Makefile
index 5ec2f9e..4998643 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_CMD_BTRFS) += btrfs.o
 obj-$(CONFIG_CMD_CACHE) += cache.o
 obj-$(CONFIG_CMD_CBFS) += cbfs.o
 obj-$(CONFIG_CMD_CLK) += clk.o
+obj-$(CONFIG_CMD_CLS) += cls.o
 obj-$(CONFIG_CMD_CONFIG) += config.o
 obj-$(CONFIG_CMD_CONITRACE) += conitrace.o
 obj-$(CONFIG_CMD_CONSOLE) += console.o
diff --git a/cmd/cls.c b/cmd/cls.c
new file mode 100644
index 0000000..f1ce6e8
--- /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", "");
-- 
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