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When input GPIO set from 0 to 1, the interrupt bit asserted in the GPIO Interrupt Cause Register (ICR) even if the corresponding interrupt masked in the GPIO Interrupt Mask Register. Because interrupt mask register only affects assertion of the interrupt bits in Main Interrupt Cause Register and it does not affect the setting of bits in the GPIO ICR. So, there is problem, when we unmask interrupt with already asserted bit in the GPIO ICR, then false interrupt immediately occurs even if GPIO don't change their value since last unmask. Signed-off-by: Maxim Kiselev <bigunclemax@gmail.com> Link: https://lore.kernel.org/r/20200115073811.24438-1-bigunclemax@gmail.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org> |
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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.