[U-Boot] [PATCH v2 03/34] log: Add documentation for convenience functions

Simon Glass sjg at chromium.org
Sun Feb 17 03:24:36 UTC 2019

The log_debug(), etc. function are documented only in the header file at
present. Add a section to README.log also.

Signed-off-by: Simon Glass <sjg at chromium.org>
Reviewed-by: Bin Meng <bmeng.cn at gmail.com>

Changes in v2:
- Also remove this feature from the TODO

 doc/README.log | 36 ++++++++++++++++++++++++++----------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/doc/README.log b/doc/README.log
index 2ee1b753bc7..75350ecd41d 100644
--- a/doc/README.log
+++ b/doc/README.log
@@ -69,6 +69,32 @@ 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.
+Convenience functions
+A number of convenience functions are available to shorten the code needed
+for logging:
+	log_err(_fmt...)
+	log_warning(_fmt...)
+	log_notice(_fmt...)
+	log_info(_fmt...)
+	log_debug(_fmt...)
+	log_content(_fmt...)
+	log_io(_fmt...)
+With these the log level is implicit in the name. The category is set by
+LOG_CATEGORY, which you can only define once per file, above all #includes:
+Remember that all uclasses IDs are log categories too.
 Log commands
@@ -187,16 +213,6 @@ Convenience functions to support setting the category:
    log_core(level, format_string, ...) - category LOGC_CORE
    log_dt(level, format_string, ...) - category LOGC_DT
-Convenience functions to support a category defined for a single file, for
-all of these can use LOG_CATEGORY as the category, and a log level
-corresponding to the function name:
-   logc(level, format_string, ...)
 More logging destinations:
    device - goes to a device (e.g. serial)

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