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When a full/low speed device is connected to USB 2.0 port on UniPhier SoC that has ehci controller, the kernel shows the following messages. | usb usb1-port1: Cannot enable. Maybe the USB cable is bad? | usb usb1-port1: Cannot enable. Maybe the USB cable is bad? | usb usb1-port1: Cannot enable. Maybe the USB cable is bad? | usb usb1-port1: unable to enumerate USB device To fix the issue, the driver needs to enable Transaction Translator on ehci root hub. This adds 'has-transaction-translator' property to each node. Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.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.