[PATCH 2/6] stdio: Tidy up use of CONFIG_SYS_DEVICE_NULLDEV

[Simon Glass]

Now that this is in Kconfig we can move the logic at the top of the file
to Kconfig, and use if() instead of #if. Update the file with these
changes.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 common/Kconfig |  1 +
 common/stdio.c | 30 ++++++++++--------------------
 2 files changed, 11 insertions(+), 20 deletions(-)

diff --git a/common/Kconfig b/common/Kconfig
index 4d5b3a9cfb..c9abd400ee 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -645,6 +645,7 @@ config SPL_SYS_STDIO_DEREGISTER
 
 config SYS_DEVICE_NULLDEV
 	bool "Enable a null device for stdio"
+	default y if SPLASH_SCREEN || SYS_STDIO_DEREGISTER
 	help
 	  Enable creation of a "nulldev" stdio device. This allows silent
 	  operation of the console by setting stdout to "nulldev". Enable
diff --git a/common/stdio.c b/common/stdio.c
index 2119204b98..33a795e7bb 100644
--- a/common/stdio.c
+++ b/common/stdio.c
@@ -31,15 +31,6 @@ static struct stdio_dev devs;
 struct stdio_dev *stdio_devices[] = { NULL, NULL, NULL };
 char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
 
-#if defined(CONFIG_SPLASH_SCREEN) && !defined(CONFIG_SYS_DEVICE_NULLDEV)
-#define	CONFIG_SYS_DEVICE_NULLDEV	1
-#endif
-
-#if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER)
-#define	CONFIG_SYS_DEVICE_NULLDEV	1
-#endif
-
-#ifdef CONFIG_SYS_DEVICE_NULLDEV
 static void nulldev_putc(struct stdio_dev *dev, const char c)
 {
 	/* nulldev is empty! */
@@ -55,7 +46,6 @@ static int nulldev_input(struct stdio_dev *dev)
 	/* nulldev is empty! */
 	return 0;
 }
-#endif
 
 static void stdio_serial_putc(struct stdio_dev *dev, const char c)
 {
@@ -96,18 +86,18 @@ static void drv_system_init (void)
 	dev.tstc = stdio_serial_tstc;
 	stdio_register (&dev);
 
-#ifdef CONFIG_SYS_DEVICE_NULLDEV
-	memset (&dev, 0, sizeof (dev));
+	if (CONFIG_IS_ENABLED(SYS_DEVICE_NULLDEV)) {
+		memset(&dev, '\0', sizeof(dev));
 
-	strcpy (dev.name, "nulldev");
-	dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
-	dev.putc = nulldev_putc;
-	dev.puts = nulldev_puts;
-	dev.getc = nulldev_input;
-	dev.tstc = nulldev_input;
+		strcpy(dev.name, "nulldev");
+		dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
+		dev.putc = nulldev_putc;
+		dev.puts = nulldev_puts;
+		dev.getc = nulldev_input;
+		dev.tstc = nulldev_input;
 
-	stdio_register (&dev);
-#endif
+		stdio_register(&dev);
+	}
 }
 
 /**************************************************************************
-- 
2.28.0.rc0.105.gf9edc3c819-goog