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+* Open PIC Binding
+
+This binding specifies what properties must be available in the device tree
+representation of an Open PIC compliant interrupt controller.  This binding is
+based on the binding defined for Open PIC in [1] and is a superset of that
+binding.
+
+Required properties:
+
+  NOTE: Many of these descriptions were paraphrased here from [1] to aid
+        readability.
+
+    - compatible: Specifies the compatibility list for the PIC.  The type
+      shall be <string> and the value shall include "open-pic".
+
+    - reg: Specifies the base physical address(s) and size(s) of this
+      PIC's addressable register space.  The type shall be <prop-encoded-array>.
+
+    - interrupt-controller: The presence of this property identifies the node
+      as an Open PIC.  No property value shall be defined.
+
+    - #interrupt-cells: Specifies the number of cells needed to encode an
+      interrupt source.  The type shall be a <u32> and the value shall be 2.
+
+    - #address-cells: Specifies the number of cells needed to encode an
+      address.  The type shall be <u32> and the value shall be 0.  As such,
+      'interrupt-map' nodes do not have to specify a parent unit address.
+
+Optional properties:
+
+    - pic-no-reset: The presence of this property indicates that the PIC
+      shall not be reset during runtime initialization.  No property value shall
+      be defined.  The presence of this property also mandates that any
+      initialization related to interrupt sources shall be limited to sources
+      explicitly referenced in the device tree.
+
+* Interrupt Specifier Definition
+
+  Interrupt specifiers consists of 2 cells encoded as
+  follows:
+
+    - <1st-cell>: The interrupt-number that identifies the interrupt source.
+
+    - <2nd-cell>: The level-sense information, encoded as follows:
+                    0 = low-to-high edge triggered
+                    1 = active low level-sensitive
+                    2 = active high level-sensitive
+                    3 = high-to-low edge triggered
+
+* Examples
+
+Example 1:
+
+	/*
+	 * An Open PIC interrupt controller
+	 */
+	mpic: pic@40000 {
+		// This is an interrupt controller node.
+		interrupt-controller;
+
+		// No address cells so that 'interrupt-map' nodes which reference
+		// this Open PIC node do not need a parent address specifier.
+		#address-cells = <0>;
+
+		// Two cells to encode interrupt sources.
+		#interrupt-cells = <2>;
+
+		// Offset address of 0x40000 and size of 0x40000.
+		reg = <0x40000 0x40000>;
+
+		// Compatible with Open PIC.
+		compatible = "open-pic";
+
+		// The PIC shall not be reset.
+		pic-no-reset;
+	};
+
+Example 2:
+
+	/*
+	 * An interrupt generating device that is wired to an Open PIC.
+	 */
+	serial0: serial@4500 {
+		// Interrupt source '42' that is active high level-sensitive.
+		// Note that there are only two cells as specified in the interrupt
+		// parent's '#interrupt-cells' property.
+		interrupts = <42 2>;
+
+		// The interrupt controller that this device is wired to.
+		interrupt-parent = <&mpic>;
+	};
+
+* References
+
+[1] Devicetree Specification
+    (https://www.devicetree.org/specifications/)
+