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2ea7714258
RV1126B has one USB2.0 PHY with two ports, the OTG port support OTG function and BC1.2, and the Host port only support Host function. The SoC provides USB GRF to control the internal UTMI+ interface and it also provides APB to access the PHY internal registers for the USB HS/FS/LS signal integrity tuning. This patch adds the USB2.0 PHY tuning to improve the signal integrity for RV1126B. 1. Enable pre-emphasis during non-chirp phase. 2. Set HS eye height to 425mv(default is 400mv). 3. Set Rx squelch trigger point configure to 112.5mv. Signed-off-by: William Wu <william.wu@rock-chips.com> Change-Id: Ief1a0aa532ba6dc6824dce72595bd39d8df8cefe
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.