These two patches fix small issues I encountered when enabling debugging output for U-Boot's TPL.
The first fixes a typo in the description of the TPL_LOG_CONSOLE configuration option.
The second adds a simple implementation of vsnprintf() to the tiny-printf library. Without this, enabling either SPL or TPL logging for systems (such as the PINE64 ROCK64) that also use the tiny printf() implementation causes the build to fail with error messages like
aarch64-linux-gnu-ld.bfd: common/built-in.o: in function `_log': (...)/u-boot/common/log.c:212: undefined reference to `vsnprintf' make[1]: *** [scripts/Makefile.spl:404: spl/u-boot-spl] Error 1 make: *** [Makefile:1762: spl/u-boot-spl] Error 2
To minimize the impact on code size, the function is built only when logging is enabled, as it appears to be unneeded otherwise.
Note we could probably shave off a few bytes by having the existing sprintf() and snprintf() functions call vsnprintf() when it's available. I haven't made this change only because it isn't how the existing code is written (printf() could call vprintf(), and snprintf() could call sprintf(), yet neither do) and I assume this is for a reason.
Simon South (2): common: Kconfig: Fix typo in TPL_LOG_CONSOLE description tiny-printf: Support vsnprintf()
common/Kconfig | 2 +- lib/tiny-printf.c | 16 ++++++++++++++++ 2 files changed, 17 insertions(+), 1 deletion(-)