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When a GPIO RIF configuration is in semaphore mode, and the semaphore hasn't been taken before configuring the GPIO, the write operations silently fail. To avoid a silent fail when applying a pinctrl, if the pins that are being configured are in semaphore mode, take the semaphore. Note that there is no proper release of the RIF semaphore yet for pinctrl. Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com> Signed-off-by: Linus Walleij <linus.walleij@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 reStructuredText 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.