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EXTI lines are mainly used to wake-up system from CStop low power mode. Currently, if a device wants to use a EXTI (direct) line as wakeup line, it has to declare 2 interrupts: - one for EXTI used to wake-up system (with dedicated_wake_irq api). - one for GIC used to get the wake up reason inside the concerned IP. This split is not really needed as each EXTI line is actually "linked " to a GIC. So to avoid this useless double interrupt management in each wake-up driver, this patch lets the STM32 EXTI driver abstract it by mapping each EXTI line to his corresponding GIC. Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200717140717.29606-1-alexandre.torgue@st.com
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.