linux-kernel - Re: [PATCH 2/3] dts: Adding docs for Xilinx LogiCORE IP mailbox driver.

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Message-ID: <555EC20C.6010703@xilinx.com>
Date:	Fri, 22 May 2015 07:43:40 +0200
From:	Michal Simek <michal.simek@...inx.com>
To:	Moritz Fischer <moritz.fischer@...us.com>,
	<jassisinghbrar@...il.com>
CC:	<linux-kernel@...r.kernel.org>, <robh+dt@...nel.org>,
	<pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<michal.simek@...inx.com>, <soren.brinkmann@...inx.com>,
	<akpm@...ux-foundation.org>, <gregkh@...uxfoundation.org>,
	<mchehab@....samsung.com>, <arnd@...db.de>, <joe@...ches.com>,
	<jingoohan1@...il.com>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/3] dts: Adding docs for Xilinx LogiCORE IP mailbox driver.

On 05/22/2015 01:37 AM, Moritz Fischer wrote:
> Signed-off-by: Moritz Fischer <moritz.fischer@...us.com>
> ---
>  .../bindings/mailbox/xilinx-mailbox.txt         | 40 ++++++++++++++++++++
>  1 file changed, 40 insertions(+)
> 

IRC the rule was to send binding first and then the driver.

> diff --git a/Documentation/devicetree/bindings/mailbox/xilinx-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xilinx-mailbox.txt
> new file mode 100644
> index 0000000..e559743
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mailbox/xilinx-mailbox.txt
> @@ -0,0 +1,40 @@
> +Xilinx Mailbox Driver
> +=====================
> +
> +Required properties:
> +- compatible :	"xlnx,mailbox-2.1".
> +- reg : 	physical base address of the mailbox and length of
> +		memory mapped region.
> +- #mbox-cells:	Common mailbox binding property to identify the number
> +		of cells required for the mailbox specifier. Should be 1.
> +
> +Optional properties:
> +- interrupt-parent :	interrupt source phandle.
> +- interrupts :		interrupt number. The interrupt specifier format

please be consistent with spacing around :. It doesn't look nice.

> +			depends on the interrupt controller parent.
> +
> +Example:
> +	mbox: mailbox@...0400000 {

remove 0x prefix here.

> +		compatible = "xlnx,axi-mailbox-2.1";
> +		reg = <0x100 0x3c>;

This is weird - it should start with 40400000.
Or is your physical address 0x100?


> +		interrupt-parent = <&intc>;
> +		interrupts = <5>;
> +		#mbox-cells = <1>;
> +	};
> +
> +Mailbox client
> +===============
> +"mboxes" and the optional "mbox-names" (please see
> +Documentation/devicetree/bindings/mailbox/mailbox.txt for details). Each value
> +of the mboxes property should contain a phandle to the mailbox controller
> +device node and second argument is the channel index. It must be 0 (hardware
> +support only one channel).The equivalent "mbox-names" property value can be

.<space>The

> +used to give a name to the communication channel to be used by the client user.
> +
> +Example:
> +	mclient0: mclient0@...00 {

ditto.

> +		compatible = "client-1.0";
> +		reg = <0x400 0x10>;
> +		mbox-names = "mbox", "mbox-rx";
> +		mboxes = <&mbox 0>;
> +	};
> 

Thanks,
Michal

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