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x86 tablets which ship with Android as (part of) the factory image typically have various problems with their DSDTs. The factory kernels shipped on these devices typically have device addresses and GPIOs hardcoded in the kernel, rather then specified in their DSDT. With the DSDT containing a random collection of devices which may or may not actually be present as well as missing devices which are actually present. This driver, which loads only on affected models based on DMI matching, adds DMI based instantiating of kernel devices for devices which are missing from the DSDT, fixing e.g. battery monitoring, touchpads and/or accelerometers not working. Note the Kconfig help text also refers to "various fixes" ATM there are no such fixes, but there are also known cases where entries are present in the DSDT but they contain bugs, such as missing/wrong GPIOs. The plan is to also add fixes for things like this here in the future. This is the least ugly option to get these devices to fully work and to do so without adding any extra code to the main kernel image (vmlinuz) when built as a module. Link: https://lore.kernel.org/platform-driver-x86/20211031162428.22368-1-hdegoede@redhat.com/ Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20211223190750.397487-1-hdegoede@redhat.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.