mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-04-30 22:50:54 -04:00
69b569c124
The isl12022 has a built-in support for monitoring the voltage of the backup battery, and setting bits in the status register when that voltage drops below two predetermined levels (usually 85% and 75% of the nominal voltage). However, since it can operate at wide range of battery voltages (2.5V - 5.5V), one must configure those trip levels according to which battery is used on a given board. Add bindings for defining these two trip levels. While the register and bit names suggest that they should correspond to 85% and 75% of the nominal battery voltage, the data sheet also says There are total of 7 levels that could be selected for the first alarm. Any of the of levels could be selected as the first alarm with no reference as to nominal Battery voltage level. Hence this provides the hardware designer the ability to choose values based on the discharge characteristics of the battery chosen for the given product, rather than just having one battery-microvolt property and having the driver choose levels close to 0.85/0.75 times that. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20230615105826.411953-4-linux@rasmusvillemoes.dk Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.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 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.