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2018-07-09log: Add a way to log a return value with a messageSimon Glass1-0/+8
It is sometimes useful to show a message when logging an error return value, perhaps to add a few details about the problem. Add a function to support this. Signed-off-by: Simon Glass <sjg@chromium.org>
2018-06-18log: Fix incorect range check in log_get_cat_name()Simon Glass1-1/+2
This allows access to an element after the end of the array. Fix it. Reported-by: Coverity (CID: 173279) Signed-off-by: Simon Glass <sjg@chromium.org>
2018-05-07SPDX: Convert all of our single license tags to Linux Kernel styleTom Rini1-2/+1
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-04-23log: fix typo LOGL_EFIHeinrich Schuchardt1-1/+1
According to the documentation the EFI log category is called LOGC_EFI. All other categories start with LOGC_. So let's fix it. Fixes: 1973b381a1b3 ("log: add category LOGC_EFI") Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-02-03log: add category LOGC_EFIHeinrich Schuchardt1-0/+1
The EFI implementation does not fit into any of the existing categories. Provide LOGC_EFI so that EFI related message can be filtered. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-02-03log: Add a way to log error-return valuesSimon Glass1-0/+11
When functions return an error it propagates up the stack to the point where it is reported. Often the error code provides enough information about the root cause of the error that this is obvious what went wrong. However in some cases the error may be hard to trace. For example if a driver uses several devices to perform an operation, it may not be obvious which one failed. Add a log_ret() macro to help with this. This can be used to wrap any error-return value. The logging system will then output a log record when the original error is generated, making it easy to trace the call stack of the error. This macro can significantly impact code size, so its use is controlled by a Kconfig option, which is enabled for sandbox. Signed-off-by: Simon Glass <sjg@chromium.org>
2018-02-03log: Add control over log formattingSimon Glass1-0/+14
It is useful to be able to control the output format of log records on the console. As a starting point, add definitions for controlling which elements of the log record are displayed. Use function and message as the default, since these are the most useful fields. Signed-off-by: Simon Glass <sjg@chromium.org>
2018-02-03log: Add functions to convert IDs to/from namesSimon Glass1-2/+37
Category and level both use an enum for their ID values. Add functions to convert these IDs to strings and vice versa. This will allow the log to output the strings instead of the (inscrutable) values. At the same time, add a new 'driver-model' category, to cover core driver-model functions and fix an incorrect value for LOGL_MAX. Tests will be added with the new 'log' subcommands. Signed-off-by: Simon Glass <sjg@chromium.org> (Updated to correct clang warnings)
2017-12-07log: Add a test commandSimon Glass1-0/+3
Add a command which exercises the logging system. Signed-off-by: Simon Glass <sjg@chromium.org>
2017-12-07log: Add an implementation of loggingSimon Glass1-0/+242
Add the logging header file and implementation with some configuration options to control it. Signed-off-by: Simon Glass <sjg@chromium.org>
2017-12-07Move debug and logging support to a separate headerSimon Glass1-0/+59
Before adding new features, move these definitions to a separate header to avoid further cluttering common.h. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>