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Age	Commit message (Collapse)	Author
2024-02-17	usb: roles: Link the switch to its connector	Heikki Krogerus
	This is probable useful information to have in user space in general, but it's primarily needed for the xHCI DbC (Debug Capability). When xHCI DbC is being used, the USB port needs to be muxed to the xHCI even in device role. In xHCI DbC mode, the xHCI is the USB device controller. Tested-by: Uday Bhat <uday.m.bhat@intel.com> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Reviewed-by: Prashant Malani <pmalani@chromium.org> Link: https://lore.kernel.org/r/20240213130018.3029991-2-heikki.krogerus@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-03-22	usb: common: Small class for USB role switches	Heikki Krogerus
	USB role switch is a device that can be used to choose the data role for USB connector. With dual-role capable USB controllers, the controller itself will be the switch, but on some platforms the USB host and device controllers are separate IPs and there is a mux between them and the connector. On those platforms the mux driver will need to register the switch. With USB Type-C connectors, the host-to-device relationship is negotiated over the Configuration Channel (CC). That means the USB Type-C drivers need to be in control of the role switch. The class provides a simple API for the USB Type-C drivers for the control. For other types of USB connectors (mainly microAB) the class provides user space control via sysfs attribute file that can be used to request role swapping from the switch. Reviewed-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>