spl: Kconfig: Move SPL_DISPLAY_PRINT to Kconfig

Move this option to Kconfig and tidy up existing uses. Also add a function
comment to the header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/arm/cpu/armv7/omap4/Kconfig

@@ -33,6 +33,9 @@ config SPL_POWER_SUPPORT
 config SPL_SERIAL_SUPPORT
 	default y
 
+config SPL_DISPLAY_PRINT
+	default y
+
 choice
 	prompt "OMAP4 board select"
 	optional

arch/arm/cpu/armv7/omap5/Kconfig

@@ -33,6 +33,9 @@ config SPL_POWER_SUPPORT
 config SPL_SERIAL_SUPPORT
 	default y
 
+config SPL_DISPLAY_PRINT
+	default y
+
 choice
 	prompt "OMAP5 board select"
 	optional

common/spl/Kconfig

@@ -61,6 +61,15 @@ 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_DISPLAY_PRINT
+	depends on SPL
+	bool "Display a board-specific message in SPL"
+	help
+	  If this option is enabled, U-Boot will call the function
+	  spl_display_print() immediately after displaying the SPL console
+	  banner ("U-Boot SPL ..."). This function should be provided by
+	  the board.
+
 config TPL
 	bool
 	depends on SPL && SUPPORT_TPL

include/configs/ti_omap4_common.h

@@ -151,7 +151,6 @@
  * So moving TEXT_BASE down to non-HS limit.
  */
 #define CONFIG_SPL_TEXT_BASE		0x40300000
-#define CONFIG_SPL_DISPLAY_PRINT
 #define CONFIG_SPL_LDSCRIPT "$(CPUDIR)/omap-common/u-boot-spl.lds"
 #define CONFIG_SYS_SPL_ARGS_ADDR	(CONFIG_SYS_SDRAM_BASE + \
 					 (128 << 20))

include/configs/ti_omap5_common.h

@@ -160,7 +160,6 @@
 #define CONFIG_SPL_TEXT_BASE	0x40300000
 #endif
 
-#define CONFIG_SPL_DISPLAY_PRINT
 #define CONFIG_SPL_LDSCRIPT "$(CPUDIR)/omap-common/u-boot-spl.lds"
 #define CONFIG_SYS_SPL_ARGS_ADDR	(CONFIG_SYS_SDRAM_BASE + \
 					 (128 << 20))

include/spl.h

@@ -122,6 +122,13 @@ void __noreturn jump_to_image_linux(struct spl_image_info *spl_image,
  */
 int spl_start_uboot(void);
 
+/**
+ * spl_display_print() - Display a board-specific message in SPL
+ *
+ * If CONFIG_SPL_DISPLAY_PRINT is enabled, U-Boot will call this function
+ * immediately after displaying the SPL console banner ("U-Boot SPL ...").
+ * This function should be provided by the board.
+ */
 void spl_display_print(void);
 
 /* NAND SPL functions */