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1d2414b4d1
The utmi iddig signal of RK3506 OTG1 is left floating by default. Even when the system is suspended and the logic is powered off, once the system resume and the clock is enabled, the controller's current mode will be set to Host mode by default, causing dwc2 fail to reinitialize. To resolve this issue, we found that the ForceHstMode bit in the GUSBCFG register returns to its default value of 0 after the logic is powered off. Once the logic power is restored, this bit does not automatically return to 1. Therefore, we can use this bit to determine whether the logic has been powered off when dr_mode is set to Host. Change-Id: I76c46c9ca7bb9f51f455a6835d3161a3edbeeebb Signed-off-by: Jianwei Zheng <jianwei.zheng@rock-chips.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.
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.