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1What: /sys/bus/platform/devices/ci_hdrc.0/role2Date: Mar 20173Contact: Peter Chen <peter.chen@nxp.com>4Description:5 When read, it returns string "gadget" or "host", indicating6 the current controller role.7 8 It will do role switch when "gadget" or "host" is written to it.9 Only controller at dual-role configuration supports writing.10