linux-kernel - Re: [PATCH v4 03/12] devicetree: Add bindings for the ATH79 DDR controllers

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Date:	Sun, 31 May 2015 15:23:53 +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>,
	Gabor Juhos <juhosg@...nwrt.org>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 03/12] devicetree: Add bindings for the ATH79 DDR controllers

Hello.

On 5/31/2015 2:52 AM, Alban Bedel wrote:

> The DDR controller of the ARxxx and AR9xxx families provides an
> interface to flush the FIFO between various devices and the DDR.
> This is mainly used by the IRQ controller to flush the FIFO before
> running the interrupt handler of such devices.

> Signed-off-by: Alban Bedel <albeu@...e.fr>
> ---
> v2: * Fix the node names to respect ePAPR
> v3: * Fix some typos
>      * Really fix the node names this time
> ---
>   .../memory-controllers/ath79-ddr-controller.txt    | 35 ++++++++++++++++++++++
>   1 file changed, 35 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/memory-controllers/ath79-ddr-controller.txt

> diff --git a/Documentation/devicetree/bindings/memory-controllers/ath79-ddr-controller.txt b/Documentation/devicetree/bindings/memory-controllers/ath79-ddr-controller.txt
> new file mode 100644
> index 0000000..efe35a06
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/memory-controllers/ath79-ddr-controller.txt
> @@ -0,0 +1,35 @@
> +Binding for Qualcomm  Atheros AR7xxx/AR9xxx DDR controller
> +
> +The DDR controller of the ARxxx and AR9xxx families provides an interface

    s/ARxxx/AR7xxx/.

> +to flush the FIFO between various devices and the DDR. This is mainly used
> +by the IRQ controller to flush the FIFO before running the interrupt handler
> +of such devices.
> +
> +Required properties:
> +
> +- compatible: has to be "qca,<soc-type>-ddr-controller",
> +  "qca,[ar7100|ar7240]-ddr-controller" as fallback.
> +  On SoC with PCI support "qca,ar7100-ddr-controller" should be used as
> +  fallback, otherwise "qca,ar7240-ddr-controller" should be used.
> +- reg: Base address and size of the controllers memory area

    Controller's.

> +- #qca,ddr-wb-channel-cells: has to be 1, the index of the write buffer
> +  channel

    Hm, index? The expectation for such props is the # of cells.

WBR, Sergei

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