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+IBM OPAL Operator Panel Binding
+-------------------------------
+
+Required properties:
+- compatible : Should be "ibm,opal-oppanel".
+- #lines : Number of lines on the operator panel e.g. <0x2>.
+- #length : Number of characters per line of the operator panel e.g. <0x10>.
+
+Example:
+ oppanel {
+ compatible = "ibm,opal-oppanel";
+ #lines = <0x2>;
+ #length = <0x10>;
+ };