linux-kernel - Re: [PATCH V5 2/3] dt-bindings: interrupt-controller: C-SKY APB intc

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Date:   Mon, 17 Sep 2018 02:23:36 -0400
From:   Rob Herring <robh@...nel.org>
To:     Guo Ren <ren_guo@...ky.com>
Cc:     tglx@...utronix.de, jason@...edaemon.net, marc.zyngier@....com,
        mark.rutland@....com, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH V5 2/3] dt-bindings: interrupt-controller: C-SKY APB intc

On Sun, Sep 16, 2018 at 04:50:03PM +0800, Guo Ren wrote:
> Signed-off-by: Guo Ren <ren_guo@...ky.com>

Needs a commit description.

> ---
>  .../interrupt-controller/csky,apb-intc.txt         | 70 ++++++++++++++++++++++
>  1 file changed, 70 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/interrupt-controller/csky,apb-intc.txt
> 
> diff --git a/Documentation/devicetree/bindings/interrupt-controller/csky,apb-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/csky,apb-intc.txt
> new file mode 100644
> index 0000000..be7c3d1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interrupt-controller/csky,apb-intc.txt
> @@ -0,0 +1,70 @@
> +==============================
> +C-SKY APB Interrupt Controller
> +==============================
> +
> +C-SKY APB Interrupt Controller is a simple soc interrupt controller
> +on the apb bus and we only use it as root irq controller.
> +
> + - csky,apb-intc is used in a lot of csky fpgas and socs, it support 64 irq nums.
> + - csky,dual-apb-intc consists of 2 apb-intc and 128 irq nums supported.
> + - csky,gx6605s-intc is gx6605s soc internal irq interrupt controller, 64 irq nums.

Is there a relationship between csky,gx6605s-intc and csky,apb-intc?

> +
> +=============================
> +intc node bindings definition
> +=============================
> +
> +        Description: Describes APB interrupt controller
> +
> +        PROPERTIES
> +
> +        - compatible
> +                Usage: required
> +                Value type: <string>
> +                Definition: must be "csky,apb-intc"
> +				    "csky,dual-apb-intc"
> +				    "csky,gx6605s-intc"
> +        - #interrupt-cells
> +                Usage: required
> +                Value type: <u32>
> +                Definition: must be <1>
> +	- reg
> +		Usage: required
> +		Value type: <u32 u32>
> +                Definition: <phyaddr size> in soc from cpu view
> +        - interrupt-controller:
> +                Usage: required
> +        - support-pulse-signal:
> +                Usage: select
> +		Description: to support pulse signal flag

What is this for?

> +
> +Examples:
> +---------
> +
> +	intc: interrupt-controller@...000 {
> +		compatible = "csky,apb-intc";
> +		#interrupt-cells = <1>;
> +		reg = <0x00500000 0x400>;
> +		interrupt-controller;
> +	};
> +
> +	intc: interrupt-controller@...000 {
> +		compatible = "csky,apb-intc";
> +		#interrupt-cells = <1>;
> +		reg = <0x00500000 0x400>;
> +		interrupt-controller;
> +		support-pulse-signal;
> +	};

Not really worth 2 examples for just 1 property difference.

> +
> +	intc: interrupt-controller@...000 {
> +		compatible = "csky,dual-apb-intc";
> +		#interrupt-cells = <1>;
> +		reg = <0x00500000 0x400>;
> +		interrupt-controller;
> +	};
> +
> +	intc: interrupt-controller@...000 {
> +		compatible = "csky,gx6605s-intc";
> +		#interrupt-cells = <1>;
> +		reg = <0x00500000 0x400>;
> +		interrupt-controller;
> +	};
> -- 
> 2.7.4
>