linux-kernel - Re: [PATCH 04/14] devicetree: Add bindings for the ATH79 interrupt controllers

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Date:	Fri, 17 Apr 2015 19:17:27 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Alban Bedel <albeu@...e.fr>, linux-mips@...ux-mips.org
CC:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Andrew Bresticker <abrestic@...omium.org>,
	Qais Yousef <qais.yousef@...tec.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/14] devicetree: Add bindings for the ATH79 interrupt
 controllers

Hello.

On 04/17/2015 05:24 PM, Alban Bedel wrote:

> Signed-off-by: Alban Bedel <albeu@...e.fr>
> ---
>   .../interrupt-controller/qca,ath79-cpu-intc.txt    | 45 ++++++++++++++++++++++
>   1 file changed, 45 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/interrupt-controller/qca,ath79-cpu-intc.txt

> diff --git a/Documentation/devicetree/bindings/interrupt-controller/qca,ath79-cpu-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/qca,ath79-cpu-intc.txt
> new file mode 100644
> index 0000000..1548512
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interrupt-controller/qca,ath79-cpu-intc.txt
> @@ -0,0 +1,45 @@
> +Binding for Qualcomm Atheros AR7xxx/AR9XXX CPU interrupt controller
> +
> +On most SoC the IRQ controller need to flush the DDR FIFO before running
> +the interrupt handler of some devices. This is configured using the
> +qca,ddr-wb-channels and qca,ddr-wb-channel-interrupts properties.
> +
> +Required Properties:
> +
> +- compatible: has to be "qca,<soctype>-cpu-intc", "qca,ar7100-cpu-intc"
> +  as fallback
> +- interrupt-controller : Identifies the node as an interrupt controller
> +- #interrupt-cells : Specifies the number of cells needed to encode interrupt
> +		     source, should be 1 for intc
> +
> +Please refer to interrupts.txt in this directory for details of the common
> +Interrupt Controllers bindings used by client devices.
> +
> +Optional Properties:
> +
> +- qca,ddr-wb-channel-interrupts: List of the interrupts needing a write
> +  buffer flush
> +- qca,ddr-wb-channels: List of phandles to the write buffer channels for
> +  each interrupt. If qca,ddr-wb-channel-interrupts is not present the interrupt
> +  default to the entry's index.
> +
> +Example:
> +
> +	cpuintc@0 {

    @0 without the "reg" property?
    And if this is an interrupt controller, the name should be 
"interrupt-controller", not "cpuintc", according to the ePAPR standard.

> +		compatible = "qca,ar9132-cpu-intc", "qca,ar7100-cpu-intc";
> +
> +		interrupt-controller;
> +		#interrupt-cells = <1>;
> +
> +		qca,ddr-wb-channel-interrupts = <2>, <3>, <4>, <5>;
> +		qca,ddr-wb-channels = <&ddr_ctrl 3>, <&ddr_ctrl 2>,
> +					<&ddr_ctrl 0>, <&ddr_ctrl 1>;
> +	};
> +
> +	...
> +
> +	ddr_ctrl: ddr-controller@...00000 {

    ePAPR standardized "memory-controller" node name in this case.

WBR, Sergei

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