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34cf358963
While strongly recommended, not all devices have a gpio to
detect if the charger is connected. This moves the 'gpios'
from required to optional section.
This also modifies error handling for the GPIO a bit: We
no longer fallback to pdata, if a GPIO is specified using
GPIO descriptor tables. This is a bit cleaner and does
not have any real impact: There are only two mainline pdata
users (arm/mach-sa1100/collie.c, arm/mach-pxa/tosa.c) and
none of them specify the GPIO via gpiod descriptor tables.
Once both have been converted the driver's support for
specifying GPIOs numbers in pdata will be dropped.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
(cherry picked from commit 1d85f6d1b0)
Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
Change-Id: I03c6f685604d954e69bcbdc55e11cfb2f16b6029
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.