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The Cadence I2C controller has an external reset that needs to be de-asserted before the I2C controller can be accessed. Document the `resets` devicetree property that can be used to describe how the reset signal is connected. While the reset signal will always be present in hardware the devicetree property is kept optional for backwards compatibility with existing systems that do not specify the reset property and where the reset signal might not be controlled by operating system. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Acked-by: Michal Simek <michal.simek@amd.com> Signed-off-by: Wolfram Sang <wsa@kernel.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.