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+What: /sys/bus/usb/.../ljca_version
+Date: July 2023
+KernelVersion: 6.4
+Contact: Ye Xiang <xiang.ye@intel.com>
+Description:
+ Provides the current firmware version of LJCA device.
+ The format is Major.Minor.Patch.Build, where
+ Major, Minor, Patch, and Build are decimal numbers.
+ For example: 1.0.0.256
+
+What: /sys/bus/usb/.../ljca_enable_dfu
+Date: July 2023
+KernelVersion: 6.4
+Contact: Ye Xiang <xiang.ye@intel.com>
+Description:
+ Writing 1 to this file to force the LJCA device into DFU
+ mode so the firmware can be updated. After firmware
+ updating has been done, the device will back to normal
+ working mode.
+
+What: /sys/bus/usb/.../ljca_trace_level
+Date: July 2023
+KernelVersion: 6.4
+Contact: Ye Xiang <xiang.ye@intel.com>
+Description:
+ Writing N to this file to set firmware log level of LJCA
+ device. The log can be printed to another computer through
+ UART ports in LJCA device. Valid values:
+
+ == ==========
+ 0 LEVEL_ERROR
+ 1 LEVEL_WARNING
+ 2 LEVEL_INFO
+ 3 LEVEL_DEBUG
+ 4 LEVEL_OFF
+ == ==========