[PATCH v7 3/6] Documentation: Add ABI doc for attributes of LJCA device

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Add sysfs attributes Documentation entries for LJCA device

Signed-off-by: Ye Xiang <xiang.ye@xxxxxxxxx>
---
 .../ABI/testing/sysfs-bus-usb-devices-ljca    | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-usb-devices-ljca

diff --git a/Documentation/ABI/testing/sysfs-bus-usb-devices-ljca b/Documentation/ABI/testing/sysfs-bus-usb-devices-ljca
new file mode 100644
index 000000000000..16eecaf870e2
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-usb-devices-ljca
@@ -0,0 +1,36 @@
+What:		/sys/bus/usb/.../ljca_version
+Date:		July 2023
+KernelVersion:	6.4
+Contact:	Ye Xiang <xiang.ye@xxxxxxxxx>
+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@xxxxxxxxx>
+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@xxxxxxxxx>
+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
+		  ==	==========
-- 
2.34.1




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