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+What: /sys/devices/.../software_node/
+Date: January 2019
+Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+Description:
+ This directory contains the details about the device that are
+ assigned in kernel (i.e. software), as opposed to the
+ firmware_node directory which contains the details that are
+ assigned for the device in firmware. The main attributes in the
+ directory will show the properties the device has, and the
+ relationship it has to some of the other devices.