devicetree/bindings/open-pic.txt

4 representation of an Open PIC compliant interrupt controller.  This binding is
13     - compatible: Specifies the compatibility list for the PIC.  The type
14       shall be <string> and the value shall include "open-pic".
16     - reg: Specifies the base physical address(s) and size(s) of this
17       PIC's addressable register space.  The type shall be <prop-encoded-array>.
19     - interrupt-controller: The presence of this property identifies the node
22     - #interrupt-cells: Specifies the number of cells needed to encode an
23       interrupt source.  The type shall be a <u32> and the value shall be 2.
25     - #address-cells: Specifies the number of cells needed to encode an
27       'interrupt-map' nodes do not have to specify a parent unit address.
31     - pic-no-reset: The presence of this property indicates that the PIC
34       initialization related to interrupt sources shall be limited to sources
37 * Interrupt Specifier Definition
39   Interrupt specifiers consists of 2 cells encoded as
42     - <1st-cell>: The interrupt-number that identifies the interrupt source.
44     - <2nd-cell>: The level-sense information, encoded as follows:
45                     0 = low-to-high edge triggered
46                     1 = active low level-sensitive
47                     2 = active high level-sensitive
48                     3 = high-to-low edge triggered
55 	 * An Open PIC interrupt controller
58 		// This is an interrupt controller node.
59 		interrupt-controller;
61 		// No address cells so that 'interrupt-map' nodes which reference
63 		#address-cells = <0>;
65 		// Two cells to encode interrupt sources.
66 		#interrupt-cells = <2>;
72 		compatible = "open-pic";
75 		pic-no-reset;
81 	 * An interrupt generating device that is wired to an Open PIC.
84 		// Interrupt source '42' that is active high level-sensitive.
85 		// Note that there are only two cells as specified in the interrupt
86 		// parent's '#interrupt-cells' property.
89 		// The interrupt controller that this device is wired to.
90 		interrupt-parent = <&mpic>;