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Sometimes, the user needs to adjust some properties for controllers, eg the role for controller, we add sysfs group for them. The attribute 'role' is used to switch host/gadget role dynamically, the uewr can read the current role, and write the other role compare to current one to finish the switch. Signed-off-by: Peter Chen <peter.chen@nxp.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.