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f837fe1bff
The ChromeOS embedded controller (EC) supports setting the state of GPIOs when the system is unlocked, and getting the state of GPIOs in all cases. The GPIOs are on the EC itself, so the EC acts similar to a GPIO expander. Add a driver to get and set the GPIOs on the EC through the host command interface. Signed-off-by: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
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.