William Wu 016b6c5734 phy: rockchip-naneng-usb2: keep utmi clk on during charge detection
When do charge detection, the phy specification suggests that
it needs to holds the phy in reset state to avoid USB data
communication. However, the utmi clk60_30 will be disabled at
the same time, that's causing a synchronization issue between
the phy and the USB controller.

I test on RV1126 EVB Linux SDK, do usb device hot plug test
quickly. The USB dwc3 controller may fail to enable ep0 because
of no clk60_30 is supplied by the phy.

This patch sets the phy utmi in normal mode by GRF to keeps the
utmi clk on for USB controller.

Signed-off-by: William Wu <william.wu@rock-chips.com>
Change-Id: I8958a491130faeb9ac361b8639e4c3d3190fad1b
2021-07-19 17:03:46 +08:00
2019-08-29 19:45:37 +08:00
2019-08-29 19:45:37 +08:00

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.
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