[U-Boot] [PATCH v8 05/13] kconfig: switch to Kconfig

[Tom Rini]

On Wed, Jul 30, 2014 at 02:08:17PM +0900, Masahiro Yamada wrote:

> This commit enables Kconfig.
> Going forward, we use Kconfig for the board configuration.
> mkconfig will never be used. Nor will include/config.mk be generated.
> 
> Kconfig must be adjusted for U-Boot because our situation is
> a little more complicated than Linux Kernel.
> We have to generate multiple boot images (Normal, SPL, TPL)
> from one source tree.
> Each image needs its own configuration input.
> 
> Usage:
> 
> Run "make <board>_defconfig" to do the board configuration.
> 
> It will create the .config file and additionally spl/.config, tpl/.config
> if SPL, TPL is enabled, respectively.
> 
> You can use "make config", "make menuconfig" etc. to create
> a new .config or modify the existing one.
> 
> Use "make spl/config", "make spl/menuconfig" etc. for spl/.config
> and do likewise for tpl/.config file.
> 
> The generic syntax of configuration targets for SPL, TPL is:
> 
>   <target_image>/<config_command>
> 
> Here, <target_image> is either 'spl' or 'tpl'
>       <config_command> is 'config', 'menuconfig', 'xconfig', etc.
> 
> When the configuration is done, run "make".
> (Or "make <board>_defconfig all" will do the configuration and build
> in one time.)
> 
> For futher information of how Kconfig works in U-Boot,
> please read the comment block of scripts/multiconfig.py.
> 
> By the way, there is another item worth remarking here:
> coexistence of Kconfig and board herder files.
> 
> Prior to Kconfig, we used C headers to define a set of configs.
> 
> We expect a very long term to migrate from C headers to Kconfig.
> Two different infractructure must coexist in the interim.
> 
> In our former configuration scheme, include/autoconf.mk was generated
> for use in makefiles.
> It is still generated under include/, spl/include/, tpl/include/ directory
> for the Normal, SPL, TPL image, respectively.
> 
> Signed-off-by: Masahiro Yamada <yamada.m at jp.panasonic.com>
> Acked-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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