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diff --git a/Bindings/fsi/ibm,p9-occ.txt b/Bindings/fsi/ibm,p9-occ.txt
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+Device-tree bindings for FSI-attached POWER9/POWER10 On-Chip Controller (OCC)
+-----------------------------------------------------------------------------
+
+This is the binding for the P9 or P10 On-Chip Controller accessed over FSI from
+a service processor. See fsi.txt for details on bindings for FSI slave and CFAM
+nodes. The OCC is not an FSI slave device itself, rather it is accessed
+through the SBE FIFO.
+
+Required properties:
+ - compatible = "ibm,p9-occ" or "ibm,p10-occ"
+
+Examples:
+
+ occ {
+ compatible = "ibm,p9-occ";
+ };