OpenRISC 1000 Programmable Interrupt Controller Required properties: - compatible : should be "opencores,or1k-pic-level" for variants with level triggered interrupt lines, "opencores,or1k-pic-edge" for variants with edge triggered interrupt lines or "opencores,or1200-pic" for machines with the non-spec compliant or1200 type implementation. "opencores,or1k-pic" is also provided as an alias to "opencores,or1200-pic", but this is only for backwards compatibility. - interrupt-controller : Identifies the node as an interrupt controller - #interrupt-cells : Specifies the number of cells needed to encode an interrupt source. The value shall be 1. Example: intc: interrupt-controller { compatible = "opencores,or1k-pic-level"; interrupt-controller; #interrupt-cells = <1>; };