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9cb7cf9c4e
We want to set the irq parent for interrupts that we're setting up to be cascaded from another interrupt controller, but we may or may not have already mapped the gpiochip irqs into the kernel's virtual irq number space at this point. If we have mapped irqs before calling here, then we've gone through gpiochip_irq_map() and called irq_set_parent() already. If we haven't mapped irqs, then the gpiochip is dynamically mapping irqs and we can rely on gpiochip_irq_map() or the gpio driver's irqdomain ops to setup the irq parent properly. Either way, setting the parent here when cascading the gpiochip doesn't make much sense because it should be done at irq mapping time. In the dynamic mapping case, this code is mapping virq 0 to some parent virq in a loop. While that's benign, let's drop this code to simplify. Cc: Evan Green <evgreen@chromium.org> Cc: Thierry Reding <treding@nvidia.com> Cc: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Stephen Boyd <swboyd@chromium.org> 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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.