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19b60f8410
Qoriq and related devices allow reading out state of GPIO set as output. However, currently on driver's init, all outputs are configured as driven low. So, any changes to GPIO confiuration will drive all pins (configured as output) as output-low. This patch latches state of output GPIOs before any GPIO configuration takes place. This preserves any output settings done prior to loading the driver (for example, by u-boot). Signed-off-by: Michal Smulski <michal.smulski@ooma.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@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 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.