[U-Boot] [PATCH] spl: add option to disable SPL banner output

[Lukasz Majewski <lukma@denx.de>]

From: Anatolij Gustschin <agust@denx.de>

Selecting this option will reduce SPL boot time by approx. 6 ms
(e. g. with 70 bytes long banner string at 115200 baud).

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Lukasz Majewski <lukma@denx.de>
---

 common/spl/Kconfig | 7 +++++++
 common/spl/spl.c   | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index d686b1ecbd..d1f9cae6b7 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -118,6 +118,13 @@ config SPL_SEPARATE_BSS
 	  location is used. Normally we put the device tree at the end of BSS
 	  but with this option enabled, it goes at _image_binary_end.
 
+config SPL_DISABLE_BANNER_PRINT
+	bool "Disable output of the SPL banner 'U-Boot SPL ...'"
+	help
+	  If this option is enabled, SPL will not print the banner with version
+	  info. Selecting this option could be useful to reduce SPL boot time
+	  (e.g. approx. 6 ms slower, when output on i.MX6 with 1152000 baud).
+
 config SPL_DISPLAY_PRINT
 	bool "Display a board-specific message in SPL"
 	help
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 76c1963611..898c416a66 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -477,8 +477,10 @@ void preloader_console_init(void)
 
 	gd->have_console = 1;
 
+#ifndef CONFIG_SPL_DISABLE_BANNER_PRINT
 	puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
 			U_BOOT_TIME ")\n");
+#endif
 #ifdef CONFIG_SPL_DISPLAY_PRINT
 	spl_display_print();
 #endif
-- 
2.11.0