ST: - the line is valid for SPL and TPL images
+S: - the line is valid for Normal and SPL images
+T: - the line is valid for Normal and TPL images
- +ST: - the line is valid for Normal, SPL and SPL images
+ +ST: - the line is valid for Normal, SPL and TPL images
So, if neither CONFIG_SPL nor CONFIG_TPL is defined, the defconfig file
has no "<condition>:" part and therefore has the same form as in Linux.
coalesced together with "<condition:>" prefix for each line as shown above.
This file can be used as an input of "defconfig" target.
+- <board>_config
+
+ This does not exist in Linux's Kconfig.
+ Prior to Kconfig, in U-Boot, "make <board>_config" was used for the
+ configuration. It is still supported for backward compatibility and
+ its behavior is the same as "make <board>_defconfig".
+
Migration steps to Kconfig
--------------------------