* Mediatek 27xx cirq In Mediatek SOCs, the CIRQ is a low power interrupt controller designed to work outside MCUSYS which comprises with Cortex-Ax cores,CCI and GIC. The external interrupts (outside MCUSYS) will feed through CIRQ and connect to GIC in MCUSYS. When CIRQ is enabled, it will record the edge-sensitive interrupts and generate a pulse signal to parent interrupt controller when flush command is executed. With CIRQ, MCUSYS can be completely turned off to improve the system power consumption without losing interrupts. Required properties: - compatible: should be one of - "mediatek,mt2701-cirq" for mt2701 CIRQ - "mediatek,mt8135-cirq" for mt8135 CIRQ - "mediatek,mt8173-cirq" for mt8173 CIRQ and "mediatek,cirq" as a fallback. - interrupt-controller : Identifies the node as an interrupt controller. - #interrupt-cells : Use the same format as specified by GIC in arm,gic.txt. - reg: Physical base address of the cirq registers and length of memory mapped region. - mediatek,ext-irq-range: Identifies external irq number range in different SOCs. Example: cirq: interrupt-controller@10204000 { compatible = "mediatek,mt2701-cirq", "mediatek,mtk-cirq"; interrupt-controller; #interrupt-cells = <3>; interrupt-parent = <&sysirq>; reg = <0 0x10204000 0 0x400>; mediatek,ext-irq-start = <32 200>; };