From f9811e8575eb42e75c615ba9b44f0481cdb78330 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sat, 16 Feb 2019 20:24:37 -0700 Subject: log: Allow #define LOG_DEBUG to enable logging in a file At present it is possible to '#define DEBUG' at the top of a file which causes all debug() statements in that file to become active. There is currently no equivalent with logging, but this is a useful function. Add a LOG_DEBUG define along with documentation. Signed-off-by: Simon Glass Reviewed-by: Bin Meng --- doc/README.log | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'doc') diff --git a/doc/README.log b/doc/README.log index 75350ecd41d..19856d43da2 100644 --- 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 --------------------- -- cgit v1.3.1