1 What: /sys/bus/platform/devices/ci_hdrc.0/role
3 Contact: Peter Chen <peter.chen@nxp.com>
5 It returns string "gadget" or "host" when read it, it indicates
6 current controller role.
8 It will do role switch when write "gadget" or "host" to it.
9 Only controller at dual-role configuration supports writing.