162306a36Sopenharmony_ciWhat:		/sys/bus/platform/devices/ci_hdrc.0/role
262306a36Sopenharmony_ciDate:		Mar 2017
362306a36Sopenharmony_ciContact:	Peter Chen <peter.chen@nxp.com>
462306a36Sopenharmony_ciDescription:
562306a36Sopenharmony_ci		When read, it returns string "gadget" or "host", indicating
662306a36Sopenharmony_ci		the current controller role.
762306a36Sopenharmony_ci
862306a36Sopenharmony_ci		It will do role switch when "gadget" or "host" is written to it.
962306a36Sopenharmony_ci		Only controller at dual-role configuration supports writing.
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