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The J721S2-EVM (J721S2-SOM mounted on the J7 Common Processor Board) has a single instance of USB namely USB0. On the board, USB0 can be enabled using a single USB interface at a time among the following: 1. USB3.1 Gen1 Type C interface 2. Two USB2.0 Type A interfaces via an on-board USB Hub By default, USB0 is enabled using the USB3.1 Gen1 Type C interface. Hence, add a device-tree overlay to allow using USB0 with the USB2.0 Type A interfaces by configuring the "USB2.0_MUX_SEL" mux. Also, since the Type A interfaces only connect to USB Devices with USB0 acting as the USB Host, set the Dual-Role mode for USB0 to Host. Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com> Link: https://patch.msgid.link/20250912062021.2906034-1-s-vadapalli@ti.com Signed-off-by: Nishanth Menon <nm@ti.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 reStructuredText 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.