mainlining shenanigans
be281368f2
Newer Logitech mice report their battery voltage through feature 0x1001 instead of the battery levels through feature 0x1000. When the device is brought up and we try to query the battery, figure out if it supports the old or the new feature. If it supports the new feature, record the feature index and read the battery voltage and its charge status. The device will respond with three bytes: the first two are its voltage, and the last one is a bitset, reporting if the battery is charging, fast or slow, in critical level or discharging. If everything went correctly, record the fact that we're capable of querying battery voltage. Note that the protocol only gives us the current voltage in mV. We store that as-is, but when queried, we report it in uV as expected by sysfs. Like we do for other ways of interacting with the battery for other devices, refresh the battery status and notify the power supply subsystem of the changes in voltage and status. Since there are no known devices which implement both the old and the new battery feature, we make sure to try the newer feature first and only fall back to the old one if that fails. Signed-off-by: Pedro Vanzella <pedro@pedrovanzella.com> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> |
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| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.