From mboxrd@z Thu Jan 1 00:00:00 1970 From: Youlin Pei Subject: [PATCH 1/3] binding: irqchip: mtk-cirq: Add binding document Date: Thu, 13 Oct 2016 13:06:32 +0800 Message-ID: <1476335194-26604-2-git-send-email-youlin.pei@mediatek.com> References: <1476335194-26604-1-git-send-email-youlin.pei@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1476335194-26604-1-git-send-email-youlin.pei@mediatek.com> Sender: linux-kernel-owner@vger.kernel.org To: Marc Zyngier , Rob Herring , Matthias Brugger Cc: youlin.pei@mediatek.com, Thomas Gleixner , Jason Cooper , Mark Rutland , Russell King , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, srv_heupstream@mediatek.com, hongkun.cao@mediatek.com, yong.wu@mediatek.com, erin.lo@mediatek.com List-Id: devicetree@vger.kernel.org This commit adds the device tree binding document for the mediatek cirq. Signed-off-by: Youlin Pei --- base on v4.8-rc1 --- .../interrupt-controller/mediatek,cirq.txt | 30 ++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 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 0000000..ad16953 --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/mediatek,cirq.txt @@ -0,0 +1,30 @@ +* Mediatek 27xx cirq + +In Mediatek SOCs, the CIRQ is a low power interrupt controller designed to +works 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 generated 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: "mediatek,mt2701-cirq". +- interrupt-controller : Identifies the node as an interrupt controller. +- #interrupt-cells : Use the same format as specified by GIC in arm,gic.txt. +- interrupt-parent: phandle of irq parent for cirq. The parent must + use the same interrupt-cells format as GIC. +- reg: Physical base address of the cirq registers and length of memory + mapped region. +- mediatek,ext-irq-start: Identifies external irq start number in different + SOCs. + +Example: + cirq: interrupt-controller@10204000 { + compatible = "mediatek,mt2701-cirq"; + interrupt-controller; + #interrupt-cells = <3>; + interrupt-parent = <&sysirq>; + reg = <0 0x10204000 0 0x4000>; + mediatek,ext-irq-start = <32>; + }; -- 1.7.9.5