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When USB is in super-speed mode and disabled as a wakeup source, observed that on the resume path, lanes have not been configured properly in the phy-zynqmp driver. As a result, after the resume, USB device detection failed on host. To resolved the above issue, added phy_init on resume and phy_exit on suspend path, to configure the GT lanes correctly. The re-initialization of phy, reset the device and re-enumerate the USB subsystem. This use-case is specific to Xilinx ZynqMP SoC. Signed-off-by: Piyush Mehta <piyush.mehta@amd.com> Link: https://lore.kernel.org/r/20220912111017.901321-3-piyush.mehta@amd.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.