Sphinx supports generating Texinfo sources and Info documentation,
which can be navigated easily and is convenient to search (via the
indexed nodes or anchors, for example).  This is basically the same as
1f050e904dd6f2955eecbd22031d912ccb2e7683, which was recently applied
to the Linux kernel.

Signed-off-by: Maxim Cournoyer <maxim.cournoyer@savoirfairelinux.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

With the addition of the revision stats this now takes over a minute. Use
a parallel build to reduce it a bit (24 seconds for me).

Series-changes; 2
- Use '-j auto' instead

Signed-off-by: Simon Glass <sjg@chromium.org>

This is an attempt to answer the comments provided by Xavier [1].

[1] https://lore.kernel.org/all/Yulcol7HpTHtjXTX@begut/

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

Parameter -W for sphinx-build turns build warnings into errors. This helps
us to avoid bad patches passing Gitlab CI.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

Provide a man-page for the md command.

Signed-off-by: Simon Glass <sjg@chromium.org>

Update the help message used for 'make help':

  Documentation targets:
    Linux kernel internal documentation in different formats from ReST:
=>
    U-Boot documentation in different formats from ReST:

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

Several patches delivered incorrect restructured text as documentation. We
should be able to discover this in Travis CI, Gitlab CI, or Azure CI.

So let us turn all build warnings into errors.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

Commit ad7061ed742e ("doc: Move device tree bindings documentation to
 doc/device-tree-bindings") moved all device tree binding documentation
to doc/device-tree-bindings directory.

The current U-Boot project still have two documentation directories:

- doc/
- Documentation/

Move all documentation and sphinx files to doc directory so all content
can be in a common place.

Signed-off-by: Breno Lima <breno.lima@nxp.com>