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+What: /sys/bus/dfl/devices/dfl_dev.X/type
+Date: Aug 2020
+KernelVersion: 5.10
+Contact: Xu Yilun <yilun.xu@intel.com>
+Description: Read-only. It returns type of DFL FIU of the device. Now DFL
+ supports 2 FIU types, 0 for FME, 1 for PORT.
+ Format: 0x%x
+
+What: /sys/bus/dfl/devices/dfl_dev.X/feature_id
+Date: Aug 2020
+KernelVersion: 5.10
+Contact: Xu Yilun <yilun.xu@intel.com>
+Description: Read-only. It returns feature identifier local to its DFL FIU
+ type.
+ Format: 0x%x