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This patch introduces support for setting the wait-pin polarity as well as using the same wait-pin for different CS regions. The waitpin polarity can be configured via the WAITPIN<X>POLARITY bits in the GPMC_CONFIG register. This is currently not supported by the driver. This patch adds support for setting the required register bits with the "ti,wait-pin-polarity" dt-property. The wait-pin can also be shared between different CS regions for special usecases. Therefore GPMC must keep track of wait-pin allocations, so it knows that either GPMC itself or another driver has the ownership. Signed-off-by: Benedikt Niedermayr <benedikt.niedermayr@siemens.com> Link: https://lore.kernel.org/r/20221102133047.1654449-2-benedikt.niedermayr@siemens.com Reviewed-by: Roger Quadros <rogerq@kernel.org> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@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.