From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- .../interrupt-controller/mediatek,cirq.txt | 33 ++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/mediatek,cirq.txt (limited to 'Documentation/devicetree/bindings/interrupt-controller/mediatek,cirq.txt') diff --git a/Documentation/devicetree/bindings/interrupt-controller/mediatek,cirq.txt b/Documentation/devicetree/bindings/interrupt-controller/mediatek,cirq.txt new file mode 100644 index 000000000..5865f4f2c --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/mediatek,cirq.txt @@ -0,0 +1,33 @@ +* 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>; + }; -- cgit v1.2.3