dm: Allow debug UART to support an early console

When there is no console ready, allow the debug UART to be used for output.
This makes debugging of early code considerably easier.

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

common/console.c

@@ -6,6 +6,7 @@
  */
 
 #include <common.h>
+#include <debug_uart.h>
 #include <stdarg.h>
 #include <iomux.h>
 #include <malloc.h>
@@ -460,6 +461,13 @@ void putc(const char c)
 		return;
 	}
 #endif
+#ifdef CONFIG_DEBUG_UART
+	/* if we don't have a console yet, use the debug UART */
+	if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
+		printch(c);
+		return;
+	}
+#endif
 #ifdef CONFIG_SILENT_CONSOLE
 	if (gd->flags & GD_FLG_SILENT)
 		return;
@@ -491,7 +499,18 @@ void puts(const char *s)
 		return;
 	}
 #endif
+#ifdef CONFIG_DEBUG_UART
+	if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
+		while (*s) {
+			int ch = *s++;
 
+			printch(ch);
+			if (ch == '\n')
+				printch('\r');
+		}
+		return;
+	}
+#endif
 #ifdef CONFIG_SILENT_CONSOLE
 	if (gd->flags & GD_FLG_SILENT)
 		return;