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Some devices will include battery status usages in the HID descriptor but we won't see that battery data for one reason or another. For example, AES sensors won't send battery data unless an AES pen is in proximity. If a user does not have an AES pen but instead only interacts with the AES touchscreen with their fingers then there is no need for us to create a battery object. Similarly, if a family of peripherals shares the same HID descriptor between wired-only and wireless-capable SKUs, users of the former may never see a battery event and will not want a power_supply object created. Link: https://bugzilla.kernel.org/show_bug.cgi?id=217062 Link: https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/2354 Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com> Tested-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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 Restructured Text 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.