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