linux-kernel - Re: [PATCH v2 2/2] dt-bindings: Add DT bindings info for FlexRM ring manager

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Date:   Fri, 9 Dec 2016 12:01:32 -0600
From:   Rob Herring <robh@...nel.org>
To:     Anup Patel <anup.patel@...adcom.com>
Cc:     Jassi Brar <jassisinghbrar@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Pramod KUMAR <pramod.kumar@...adcom.com>,
        Rob Rice <rob.rice@...adcom.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com
Subject: Re: [PATCH v2 2/2] dt-bindings: Add DT bindings info for FlexRM ring
 manager

On Fri, Dec 02, 2016 at 10:08:56AM +0530, Anup Patel wrote:
> This patch adds device tree bindings document for the FlexRM
> ring manager found on Broadcom iProc SoCs.
> 
> Reviewed-by: Ray Jui <ray.jui@...adcom.com>
> Reviewed-by: Scott Branden <scott.branden@...adcom.com>
> Signed-off-by: Anup Patel <anup.patel@...adcom.com>
> ---
>  .../bindings/mailbox/brcm,iproc-flexrm-mbox.txt    | 60 ++++++++++++++++++++++
>  1 file changed, 60 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.txt
> 
> diff --git a/Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.txt b/Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.txt
> new file mode 100644
> index 0000000..e81f116
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.txt
> @@ -0,0 +1,60 @@

[...]

> +Example:
> +--------
> +crypto_mbox: mbox@...00000 {
> +	compatible = "brcm,flexrm-mbox";
> +	reg = <0x67000000 0x200000>;
> +	msi-parent = <&gic_its 0x7f00>;
> +	#mbox-cells = <3>;
> +};
> +
> +crypto_client {
> +	...
> +	mboxes = <&crypto_mbox 0 0x1 0xffff>,
> +		 <&crypto_mbox 1 0x1 0xffff>,
> +		 <&crypto_mbox 16 0x1 0xffff>,
> +		 <&crypto_mbox 17 0x1 0xffff>,
> +		 <&crypto_mbox 30 0x1 0xffff>,
> +		 <&crypto_mbox 31 0x1 0xffff>;

The FlexRM part looks fine. I still don't understand what this node is. 
Is this a h/w block or just a list of mailboxes? What determines the 
mailbox channel numbers here? I need to see what the complete node looks 
like.

Rob