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