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AXES_ENABLE can be used in place of DIRECTION_ENABLE to indicate, which FFB-enabled axes will be affected by a given effect. EFFECT_DIRECTION enables all and uses the first direction only while AXES_ENABLE is a bitmask and bit indexes are the same as the defined GD usages in the EFFECT_DIRECTION array. Each axis can have it's own direction in this case. Search for AXES_ENABLE, set AXES_ENABLE for all axes if DIRECTION_ENABLE is not used. Search for specific axes in the direction array. Save their indexes. This let us know what axes are actually available on the device and which bit in the AXES_ENABLE field corresponds to which axis. Signed-off-by: Tomasz Pakuła <tomasz.pakula.oficjalny@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.