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389597581e
There is a possibility of user needs for USB mode switching on boards that lack external hardware support for dynamic host/device role detection. This is particularly relevant in automotive applications where userspace applications need to switch USB roles (host to device) at runtime for CarPlay/Android Auto integration. Add an `allow_userspace_control` flag to handle such cases. When enabled, it exposes a sysfs attribute that allows userspace to switch the USB role manually between host and device. This provides flexibility for platforms that cannot rely on hardware-based mode detection. The role switch can be done as below echo host > /sys/class/usb_role/<ADDR>.usb-role-switch/role echo device > /sys/class/usb_role/<ADDR>.usb-role-switch/role Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> Signed-off-by: Pritam Manohar Sutar <pritam.sutar@samsung.com> Link: https://patch.msgid.link/20251024085455.789555-1-pritam.sutar@samsung.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 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.