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This makes use of the gpio-ranges feature that connects GPIO controllers and PINMUX controllers. In da850.dtsi, pinctrl-single,gpio-range is added to the pinmux node and gpio-ranges is added to the GPIO node. Unfortunately, the way the pinctrl-single driver enumerates the pins (starting with LSB) causes them to be in reverse order compared to the way the gpios are assigned. As a result, we have to declare the mapping for each GPIO individually. This also lets us remove all of the GPIO pinmuxes from da850-lego-ev3.dts. (Other da850 boards do not currently have any GPIO pinmuxes declared.) Acked-by: Linus Walleij <linus.wallei@linaro.org> Signed-off-by: David Lechner <david@lechnology.com> Signed-off-by: Sekhar Nori <nsekhar@ti.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.
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.