Kconfig: Add CMD_SPL_NOR_OFS config for falcon boot argument offset

[oweals/u-boot.git] / doc / README.log

diff --git a/doc/README.log b/doc/README.log
index 75350ecd41d754e67d592c054576bb742e87969e..19856d43da22e8e59a3c48c008f0a2e61e9e7c37 100644 (file)
--- a/doc/README.log
+++ b/doc/README.log
@@ -69,6 +69,21 @@ If CONFIG_LOG is not set, then no logging will be available.
 The above have SPL versions also, e.g. CONFIG_SPL_MAX_LOG_LEVEL.
 
 
+Temporary logging within a single file
+--------------------------------------
+
+Sometimes it is useful to turn on logging just in one file. You can use this:
+
+   #define LOG_DEBUG
+
+to enable building in of all logging statements in a single file. Put it at
+the top of the file, before any #includes.
+
+To actually get U-Boot to output this you need to also set the default logging
+level - e.g. set CONFIG_LOG_DEFAULT_LEVEL to 7 (LOGL_DEBUG) or more. Otherwise
+debug output is suppressed and will not be generated.
+
+
 Convenience functions
 ---------------------