linux-kernel - Re: [PATCH 1/3] binding: irqchip: mtk-cirq: Add binding document

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Date:   Thu, 13 Oct 2016 15:00:11 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Youlin Pei <youlin.pei@...iatek.com>,
        Marc Zyngier <marc.zyngier@....com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, srv_heupstream@...iatek.com,
        hongkun.cao@...iatek.com, yong.wu@...iatek.com,
        erin.lo@...iatek.com
Subject: Re: [PATCH 1/3] binding: irqchip: mtk-cirq: Add binding document



On 10/13/2016 07:06 AM, Youlin Pei wrote:
> This commit adds the device tree binding document for
> the mediatek cirq.
>
> Signed-off-by: Youlin Pei <youlin.pei@...iatek.com>
>
> ---
> 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".

The cirq is present in several SoCs. I suppose it is the same core in 
all of them. So we can name it mediatek,mtk-cirq and add a 
mediatek,mtXXXX-cirq for every SoC, just in case we will need it.

Thanks,
Matthias