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2017-05-03Merge branch 'for-linus' of ↵Linus Torvalds1-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input Pull input subsystem updates from Dmitry Torokhov: - a big update from Mauro converting input documentation to ReST format - Synaptics PS/2 is now aware of SMBus companion devices, which means that we can now use native RMI4 protocol to handle touchpads, instead of relying on legacy PS/2 mode. - we removed support from BMA180 accelerometer from input devices as it is now handled properly by IIO - update to TSC2007 to corretcly report pressure - other miscellaneous driver fixes. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (152 commits) Input: ar1021_i2c - use BIT to check for a bit Input: twl4030-pwrbutton - use input_set_capability() helper Input: twl4030-pwrbutton - use correct device for irq request Input: ar1021_i2c - enable touch mode during open Input: add uinput documentation dt-bindings: input: add bindings document for ar1021_i2c driver dt-bindings: input: rotary-encoder: fix typo Input: xen-kbdfront - add module parameter for setting resolution ARM: pxa/raumfeld: fix compile error in rotary controller resources Input: xpad - do not suggest writing to Dominic Input: xpad - don't use literal blocks inside footnotes Input: xpad - note that usb/devices is now at /sys/kernel/debug/ Input: docs - freshen up introduction Input: docs - split input docs into kernel- and user-facing Input: docs - note that MT-A protocol is obsolete Input: docs - update joystick documentation a bit Input: docs - remove disclaimer/GPL notice Input: fix "Game console" heading level in joystick documentation Input: rotary-encoder - remove references to platform data from docs Input: move documentation for Amiga CD32 ...
2017-04-06Input: create a book with Linux Input documentationMauro Carvalho Chehab1-0/+2
Now that all files under Documentation/input follows the ReST markup language, rename them to *.rst and create a book for the Linux Input subsystem. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2017-03-31Use sphinx.version_info directly instead of parsingRémy Léone1-2/+2
Using the development version of sphinx caused the parsing of the version to fail. Signed-off-by: Rémy Léone <remy.leone@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-03-09docs-rst: automatically convert Graphviz and SVG imagesMarkus Heiser1-1/+1
This patch brings scalable figure, image handling and a concept to embed *render* markups: * DOT (http://www.graphviz.org) * SVG For image handling use the 'image' replacement:: .. kernel-image:: svg_image.svg :alt: simple SVG image For figure handling use the 'figure' replacement:: .. kernel-figure:: svg_image.svg :alt: simple SVG image SVG image example Embed *render* markups (or languages) like Graphviz's **DOT** is provided by the *render* directive.:: .. kernel-render:: DOT :alt: foobar digraph :caption: Embedded **DOT** (Graphviz) code. digraph foo { "bar" -> "baz"; } The *render* directive is a concept to integrate *render* markups and languages, yet supported markups: * DOT: render embedded Graphviz's **DOT** * SVG: render embedded Scalable Vector Graphics (**SVG**) Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Tested-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Tested-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> (v2 - v5) Signed-off-by: Markus Heiser <markus.heiser@darmarit.de> (v1, v6) Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-03-04Documentation/sphinx: fix primary_domain configurationJohn Keeping1-1/+1
With Sphinx 1.5.3 I get the warning: WARNING: primary_domain 'C' not found, ignored. It seems that domain names in Sphinx are case-sensitive and for the C domain the name must be lower case. Signed-off-by: John Keeping <john@metanate.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-02-06docs: Remove the copyright year from conf.pyJonathan Corbet1-1/+1
It had gone stale, of course, as it would every year, a single date doesn't really cover things, and the date isn't really needed anyway.
2016-11-19docs-rst: doc-guide: split the kernel-documentation.rst contentsMauro Carvalho Chehab1-0/+2
Having the kernel-documentation at the topmost level doesn't allow generating a separate PDF file for it. Also, makes harder to add extra contents. So, place it on a sub-dir. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-11-17docs: Add more manuals to the PDF buildJonathan Corbet1-0/+6
There were a few manuals that weren't being built in PDF format, but there's no reason not to... Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-11-17docs-rst: fix LaTeX \DURole renewcommand with Sphinx 1.3+Mauro Carvalho Chehab1-1/+5
PDF build on Kernel 4.9-rc? returns an error with Sphinx 1.3.x and Sphinx 1.4.x, when trying to solve some cross-references. The solution is to redefine the \DURole macro. However, this is redefined too late. Move such redefinition to LaTeX preamble and bind it to just the Sphinx versions where the error is known to be present. Tested by building the documentation on interactive mode: make PDFLATEX=xelatex -C Documentation/output/./latex Fixes: e61a39baf74d ("[media] index.rst: Fix LaTeX error in interactive mode on Sphinx 1.4.x") Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-11-03Documentation/sphinx: set literal block highlight language to noneJani Nikula1-1/+1
Set the default highlight language to "none", i.e. do not try to guess the language and do automatic syntax highlighting on literal blocks. Eyeballing around the generated documentation, we don't seem to actually have a lot of literal blocks that would benefit from syntax highlighting. The C code blocks we do have are typically very short, and most of the literal blocks are things that shouldn't be highlighted (or, do not have a pygments lexer). This seems to be true for literal blocks both in the rst source files and in source code comments. Not highlighting code is never wrong, but guessing the language wrong almost invariably leads to silly or confusing highlighting. At the time of writing, admin-guide/oops-tracing.rst and admin-guide/ramoops.rst contain good examples of 1) a small C code snippet not highlighted, 2) a hex dump highligted as who knows what, 3) device tree block highlighted as C or maybe Python, 4) a terminal interaction highlighted as code in some language, and finally, 5) some C code snippets correctly identified as C. I think we're better off disabling language guessing, and going by explicitly identified languages for longer code blocks. It is still possible to enable highlighting on an rst source file basis using the highlight directive: .. higlight:: language and on a literal block basis using the code-block directive: .. code-block:: language See http://www.sphinx-doc.org/en/latest/markup/code.html for details. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Cc: Markus Heiser <markus.heiser@darmarit.de> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-11-03Documentation/sphinx: include admin-guide in the latex/pdf buildJani Nikula1-1/+1
Fix the warning: WARNING: "latex_documents" config value references unknown document user/index Reviewed-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-10-24docs-rst: create an user's manual bookMauro Carvalho Chehab1-0/+2
Place README, REPORTING-BUGS, SecurityBugs and kernel-parameters on an user's manual book. As we'll be numbering the user's manual, remove the manual numbering from SecurityBugs. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-10-24docs: rename development-process/ to process/Mauro Carvalho Chehab1-1/+1
As we'll type this a lot, after adding CodingStyle & friends, let's rename the directory name to a shorter one. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-10-20Documentation/sphinx: rename kernel-doc.py to kerneldoc.pyJani Nikula1-1/+1
Python module names should not have hyphens per [PEP 8]. Drop the hyphen from kernel-doc.py. The extension directive remains unchanged. [PEP 8] https://www.python.org/dev/peps/pep-0008/#package-and-module-names Reported-by: Markus Heiser <markus.heiser@darmarit.de> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-10-11Merge tag 'media/v4.9-1' of ↵Linus Torvalds1-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - Documentation improvements: conversion of all non-DocBook documents to Sphinx and lots of fixes to the uAPI media book - New PCI driver for Techwell TW5864 media grabber boards - New SoC driver for ATMEL Image Sensor Controller - Removal of some obsolete SoC drivers (s5p-tv driver and soc_camera drivers) - Addition of ST CEC driver - Lots of drivers fixes, improvements and additions * tag 'media/v4.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (464 commits) [media] ttusb_dec: avoid the risk of go past buffer [media] cx23885: Fix some smatch warnings [media] si2165: switch to regmap [media] si2165: use i2c_client->dev instead of i2c_adapter->dev for logging [media] si2165: Remove legacy attach [media] cx231xx: attach si2165 driver via i2c_client [media] cx231xx: Prepare for attaching new style i2c_client DVB demod drivers [media] cx23885: attach si2165 driver via i2c_client [media] si2165: support i2c_client attach [media] si2165: avoid division by zero [media] rcar-vin: add R-Car gen2 fallback compatibility string [media] lgdt3306a: remove 20*50 msec unnecessary timeout [media] cx25821: Remove deprecated create_singlethread_workqueue [media] cx25821: Drop Freeing of Workqueue [media] cxd2841er: force 8MHz bandwidth for DVB-C if specified bw not supported [media] redrat3: hardware-specific parameters [media] redrat3: remove hw_timeout member [media] cxd2841er: BER and SNR reading for ISDB-T [media] dvb-usb: avoid link error with dib3000m{b,c| [media] dvb-usb: split out common parts of dibusb ...
2016-10-04Merge tag 'docs-4.9' of git://git.lwn.net/linuxLinus Torvalds1-13/+91
Pull documentation updates from Jonathan Corbet: "This is the documentation update pull for the 4.9 merge window. The Sphinx transition is still creating a fair amount of work. Here we have a number of fixes and, importantly, a proper PDF output solution, thanks to Jani Nikula, Mauro Carvalho Chehab and Markus Heiser. I've started a couple of new books: a driver API book (based on the old device-drivers.tmpl) and a development tools book. Both are meant to show how we can integrate together our existing documentation into a more coherent and accessible whole. It involves moving some stuff around and formatting changes, but, I think, the results are worth it. The good news is that most of our existing Documentation/*.txt files are *almost* in RST format already; the amount of messing around required is minimal. And, of course, there's the usual set of updates, typo fixes, and more" * tag 'docs-4.9' of git://git.lwn.net/linux: (120 commits) URL changed for Linux Foundation TAB dax : Fix documentation with respect to struct pages iio: Documentation: Correct the path used to create triggers. docs: Remove space-before-label guidance from CodingStyle docs-rst: add inter-document cross references Documentation/email-clients.txt: convert it to ReST markup Documentation/kernel-docs.txt: reorder based on timestamp Documentation/kernel-docs.txt: Add dates for online docs Documentation/kernel-docs.txt: get rid of broken docs Documentation/kernel-docs.txt: move in-kernel docs Documentation/kernel-docs.txt: remove more legacy references Documentation/kernel-docs.txt: add two published books Documentation/kernel-docs.txt: sort books per publication date Documentation/kernel-docs.txt: adjust LDD references Documentation/kernel-docs.txt: some improvements on the ReST output Documentation/kernel-docs.txt: Consistent indenting: 4 spaces Documentation/kernel-docs.txt: Add 4 paper/book references Documentation/kernel-docs.txt: Improve layouting of book list Documentation/kernel-docs.txt: Remove offline or outdated entries docs: Clean up bare :: lines ...
2016-09-21docs-rst: create a book for the development processMauro Carvalho Chehab1-0/+2
Now that the files at Documentation/development-process/ were converted to ReST, make create a book at Sphinx. As we'll have other books related to the development process, we'll add it as a sub-book. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-23docs-rst: add media documentation to PDF outputMauro Carvalho Chehab1-0/+2
Now that the build of PDF output on media got fixed, re-add it to the Sphinx PDF build. Partially reverts 3eb6cd6834c3 ('Documentation: exclude media documentation from pdf generation'). Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-08-23Merge branch 'doc/4.9' into docs-nextJonathan Corbet1-12/+35
2016-08-23docs-rst: add package adjustboxMauro Carvalho Chehab1-0/+3
We need adjustbox to allow adjusting the size of tables that are bigger than the line width. There are quite a few of them at the media books. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-23docs-rst: Fix an warning when in interactive modeMauro Carvalho Chehab1-5/+5
When XeLaTeX is in interactive mode, it complains that py@noticelength already exists. Rename it and declare it only once to avoid such messages. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-23docs-rst: Use better colors for note/warning/attention boxesMauro Carvalho Chehab1-10/+24
Instead of painting the box with gray, let's use a colored box. IMHO, that makes easier to warn users about some issue pointed by the Sphinx. It also matches to what we do already with the HTML output. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-23docs-rst: conf.py: adjust the size of .. note:: tagMauro Carvalho Chehab1-1/+7
While the current implementation works well when using as a paragraph, it doesn't work properly if inside a table. As we have quite a few such cases, fix the logic to take the column size into account. PS.: I took the logic there from the latest version of Sphinx.sty Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-23doc-rst: add boilerplate to customize c-domainMarkus Heiser1-1/+1
Add a sphinx-extension to customize the sphinx c-domain. No functional changes right yet, just the boilerplate code. Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de> [ jc: coding-style tweak ] Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-19Merge branch 'doc/4.9' into docs-nextJonathan Corbet1-11/+55
2016-08-19docs-rst: enable the Sphinx math extensionMauro Carvalho Chehab1-0/+11
This extension will be used by the media books. The name of the math image extension changed on Sphinx 1.4.x, according with: http://www.sphinx-doc.org/en/stable/ext/math.html#module-sphinx.ext.imgmath Let's autodetect, to keep building with versions < 1.4. Suggested-by: Markus Heiser <markus.heiser@darmarit.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-19docs-rst: better adjust margins and font sizeMauro Carvalho Chehab1-1/+4
As we have big tables, reduce the left/right margins and decrease the point size to 8pt. Visually, it is still good enough, and now less tables are too big to be displayed. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-19docs-rst: Don't mangle with UTF-8 chars on LaTeX/PDF outputMauro Carvalho Chehab1-0/+11
pdflatex doesn't accept using some UTF-8 chars, like "equal or less than" or "equal or greater than" chars. However, the media documents use them. So, we need to use XeLaTeX for conversion, and a font that accepts such characters. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-19docs-rst: improve output for .. notes:: on LaTeXMauro Carvalho Chehab1-0/+23
The output for those notes are bad in pdf, as they're not in a box with a different color. Also, it causes the output to not build if the note is inside a table. Change its implementation to avoid the above troubles. The logic there came from: https://stackoverflow.com/questions/606746/how-to-customize-an-existing-latex-environment-without-interfering-with-other-en Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-19docs-rst: allow generating some LaTeX pages in landscapeMauro Carvalho Chehab1-5/+8
Portrait is too small for some tables used at the media docs. So, allow documents to tell Sphinx to generate some pages in landscape by using: .. raw:: latex \begin{landscape} <some stuff> .. raw:: latex \end{landscape} Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-19docs-rst: remove a rst2pdf left over codeMauro Carvalho Chehab1-7/+0
The usage of rst2pdf was replaced by pdflatex on a previous patch. Remove the left-over code at conf.py. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-14Merge branch 'doc/4.9' into docs-nextJonathan Corbet1-0/+7
2016-08-14doc-rst: generic way to build only sphinx sub-foldersMarkus Heiser1-0/+7
Add a generic way to build only a reST sub-folder with or without a individual *build-theme*. * control *sub-folders* by environment SPHINXDIRS * control *build-theme* by environment SPHINX_CONF Folders with a conf.py file, matching $(srctree)/Documentation/*/conf.py can be build and distributed *stand-alone*. E.g. to compile only the html of 'media' and 'gpu' folder use:: make SPHINXDIRS="media gpu" htmldocs To use an additional sphinx-build configuration (*build-theme*) set the name of the configuration file to SPHINX_CONF. E.g. to compile only the html of 'media' with the *nit-picking* build use:: make SPHINXDIRS=media SPHINX_CONF=conf_nitpick.py htmldocs With this, the Documentation/conf.py is read first and updated with the configuration values from the Documentation/media/conf_nitpick.py. Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-13Merge branch 'doc/4.8-fixes' into docs-nextJonathan Corbet1-1/+1
2016-08-13Documentation: exclude media documentation from pdf generationJani Nikula1-1/+3
Although pdflatex is more robust than rst2pdf, building media documentation pdf still fails. Exclude media documentation from pdf generation for now. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Markus Heiser <markus.heiser@darmarit.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-12docs: Set the Sphinx default highlight language to "guess"Jonathan Corbet1-1/+1
This should eliminate a whole class of markup warnings, at the cost of occasionally amusing markup choices; we'll have to see if it works out. Suggested-by: Markus Heiser <markus.heiser@darmarIT.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-07-15doc-rst: Fix compilation of the pdf docbookMauro Carvalho Chehab1-1/+1
The rst2pdf tool is a very broken toolchain, with is not capable of parsing complex documents. As such, it doesn't build the media book, failing with: [ERROR] pdfbuilder.py:130 too many values to unpack (using rst2pdf version 0.93.dev-r0 and Sphinx version 1.4.5) So, make it build only the books we know that are safe to build. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> -- Btw, with the standard Sphinx version shipped on Fedora 24 (Sphinx 1.3.1), rst2pdf doesn't build even the simple kernel-documentation, failing with this error: writing Kernel... [ERROR] pdfbuilder.py:130 list index out of range This is a known bug: https://github.com/sphinx-doc/sphinx/issues/1844 So, maybe we should just disable pdf generation from RST for good, as I suspect that maintaining it with a broken toolchain will be a big headache.
2016-07-08doc-rst: linux_tv/Makefile: Honor quiet make O=dirMarkus Heiser1-1/+1
To honor the: make O=dir [targets] Locate all output files in "dir" * activate kernel-include directive * export BUILDDIR=$(BUILDDIR) * linux_tv: replace '.. include::' with '.. kernel-include:: $BUILDDIR/<foo.h.rst>' Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-07-05doc-rst: boilerplate HTML theme customizationMarkus Heiser1-1/+8
Implements the minimal boilerplate for Sphinx HTML theme customization. Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-06-30doc-rst: flat-table directive - initial implementationMarkus Heiser1-1/+1
Implements the reST flat-table directive. The ``flat-table`` is a double-stage list similar to the ``list-table`` with some additional features: * column-span: with the role ``cspan`` a cell can be extended through additional columns * row-span: with the role ``rspan`` a cell can be extended through additional rows * auto span rightmost cell of a table row over the missing cells on the right side of that table-row. With Option ``:fill-cells:`` this behavior can changed from *auto span* to *auto fill*, which automaticly inserts (empty) list tables The *list tables* formats are double stage lists. Compared to the ASCII-art they migth be less comfortable for readers of the text-files. Their advantage is, that they are easy to create/modify and that the diff of a modification is much more meaningfull, because it is limited to the modified content. The initial implementation was taken from the sphkerneldoc project [1] [1] https://github.com/return42/sphkerneldoc/commits/master/scripts/site-python/linuxdoc/rstFlatTable.py Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de> [jc: fixed typos and misspellings in the docs] Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-05-30Documentation/sphinx: set version and release properlyJani Nikula1-4/+25
Read the version and release from the top level Makefile (for use when Sphinx is invoked directly, by e.g. Read the Docs), but override them via Sphinx command line arguments in a normal documentation build. Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30Documentation/sphinx: configure the kernel-doc extensionJani Nikula1-2/+8
Tell Sphinx where to find the extension, and pass on the kernel src tree and kernel-doc paths to the extension. With this, any .rst files under Documentation may contain the kernel-doc rst directive to include kernel-doc documentation from any source file. While building, it may be handy to pass kernel-doc extension configuration on the command line. For example, 'make SPHINXOPTS="-D kerneldoc_verbosity=0" htmldocs' silences all stderr output from kernel-doc when the kernel-doc exit code is 0. (The stderr will be logged unconditionally when the exit code is non-zero.) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30Documentation/sphinx: add basic working Sphinx configuration and buildJani Nikula1-0/+387
Add basic configuration and makefile to build documentation from any .rst files under Documentation using Sphinx. For starters, there's just the placeholder index.rst. At the top level Makefile, hook Sphinx documentation targets alongside (but independent of) the DocBook toolchain, having both be run on the various 'make *docs' targets. All Sphinx processing is placed into Documentation/Makefile.sphinx. Both that and the Documentation/DocBook/Makefile are now expected to handle all the documentation targets, explicitly ignoring them if they're not relevant for that particular toolchain. The changes to the existing DocBook Makefile are kept minimal. There is graceful handling of missing Sphinx and rst2pdf (which is needed for pdf output) by checking for the tool and python module, respectively, with informative messages to the user. If the Read the Docs theme (sphinx_rtd_theme) is available, use it, but otherwise gracefully fall back to the Sphinx default theme, with an informative message to the user, and slightly less pretty HTML output. Sphinx can now handle htmldocs, pdfdocs (if rst2pdf is available), epubdocs and xmldocs targets. The output documents are written into per output type subdirectories under Documentation/output. Finally, you can pass options to sphinx-build using the SPHINXBUILD make variable. For example, 'make SPHINXOPTS=-v htmldocs' for more verbose output from Sphinx. This is based on the original work by Jonathan Corbet, but he probably wouldn't recognize this as his own anymore. Signed-off-by: Jani Nikula <jani.nikula@intel.com>