Ignore defconfig and tools/fdtgrep.

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

The old configuration script is no longer necessary.
Nor is boards.cfg a primary database.
We can generate it with the genboardscfg.py tool
based on the latest Kconfig, defconfig and MAINTAINERS.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>

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@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>

There have been /errlog and /reloc_off in the top level .gitignore
since commit 1b4aaffe added it about 7 years ago.

But they are no longer generated.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

All files under spl/ and tpl/ are generated during the build process
except spl/Makefile.

We can simplify clean-rule and git-ignore by moving spl/Makefile
to somewhere else.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

GCC on Cygwin generates executables with .exe extension,
for example:
 scripts/basic/fixdep.exe
 scripts/docproc.exe

To ignore them, *.exe pattern should be moved
from tools/.gitignore to ./.gitignore

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

This pattern was added by commit cc4f427b to ignore the intermidiate
file for generating DTB.

When Kbuild was introduced, dts/Makefile was totally re-written.
This ignore pattern is already useless.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

Trivial fix to .gitignore for spl/Makefile

According to the gitignore man page:

"An optional prefix "!" which negates the pattern; any matching file
excluded by a previous pattern will become included again."
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
So the directory exclude "/spl/*" must come before the exception
for spl/Makefile otherwise it has no effect.

Signed-off-by: Ralph Siemsen <ralphs@netwinder.org>
Tested-by: Masahiro Yamada <yamada.m@jp.panasonic.com> [on git v1.7.9.5 / v1.8.3.2]

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

U-Boot supports various boot images for various SoCs.
It is annoying to modify .gitignore file every time
we add/delete boot images.

Fortunately, there is a simple rule:
Those with file name prefix "u-boot" at the top directory
are all generated files.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>