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On SoC stm32mp257, GPIO supports security and isolation compliant with the Resource Isolation Framework (RIF). Each GPIO line can be assigned to different security and compartment domains. Add the generic code to handle the RIF configuration set by the secure world and initialize the GPIO valid mask accordingly. Enable the RIF support for stm32mp257. Co-developed-by: Gatien Chevallier <gatien.chevallier@foss.st.com> Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com> Signed-off-by: Antonio Borneo <antonio.borneo@foss.st.com> Link: https://lore.kernel.org/20250610143042.295376-4-antonio.borneo@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.