Main node required properties:
- compatible : should be one of:
- "arm,gic-400"
+ "arm,arm1176jzf-devchip-gic"
+ "arm,arm11mp-gic"
"arm,cortex-a15-gic"
- "arm,cortex-a9-gic"
"arm,cortex-a7-gic"
- "arm,arm11mp-gic"
+ "arm,cortex-a9-gic"
+ "arm,gic-400"
+ "arm,pl390"
"brcm,brahma-b15-gic"
- "arm,arm1176jzf-devchip-gic"
"qcom,msm-8660-qgic"
"qcom,msm-qgic2"
- interrupt-controller : Identifies the node as an interrupt controller