66d27d848f
Unfortunately, at the time of writing this commit message, we have been unable to get permission from Silead, or from device OEMs, to distribute the necessary Silead firmware files in linux-firmware. On a whole bunch of devices the UEFI BIOS code contains a touchscreen driver, which contains an embedded copy of the firmware. The fw-loader code has a "platform" fallback mechanism, which together with info on the firmware from drivers/platform/x86/touchscreen_dmi.c will use the firmware from the UEFI driver when the firmware is missing from /lib/firmware. This makes the touchscreen work OOTB without users needing to manually download the firmware. The firmware bundled with the original Windows/Android is usually newer then the firmware in the UEFI driver and it is better calibrated. This better calibration can lead to significant differences in the reported min/max coordinates. Add support for a new (optional) "silead,efi-fw-min-max" property which provides a set of alternative min/max values to use for the x/y axis when the EFI embedded firmware is used. The new property is only used on (x86) devices which do not use devicetree, IOW it is not used in actual devicetree files. The devicetree-bindings maintainers have requested properties like these to not be added to the devicetree-bindings, so the new property is deliberately not added to the existing silead devicetree-bindings documentation. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20211122220637.11386-2-hdegoede@redhat.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.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.