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During system suspend and resume, the iddig control registers maybe changed unexpectedly because of some reasons, such as grf lost power or modified in phy tuning, it will cause otg host mode invalid after system resume if the otg port was forced to host mode by iddig registers before enter suspend. This patch check the otg port mode and iddig status in resume, if the otg port in force host mode and the iddig status has changed during resume, it recovery the iddig control regs for host mode. Signed-off-by: William Wu <william.wu@rock-chips.com> Change-Id: I881736718db6ee5cf42c0cff58f3c2629cb29928
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.