3283d820dc
Add runtime PM support and allow the GPIO controller to enter into runtime suspend automatically when not in use to save power. However, it will automatically resume and enable clocks when a GPIO or IRQ is requested. While putting the GPIO module itself into power saving mode may not have an obvious impact on current dissipation, the function is necessary because the GPIO module disables its clock when idle. This enables the system an opportunity to power off the parent subsystem, and this conserves more power. The typical i.MX8 SoC features up to 8 GPIO controllers, but most of the controllers often remain unused. Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.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.