linux-kernel - Re: [PATCH 2/2] ARM: dts: NSP: Add mailbox (PDC) to NSP

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Date:   Wed, 22 Feb 2017 18:37:26 -0500
From:   Jon Mason <jon.mason@...adcom.com>
To:     Steve Lin <steven.lin1@...adcom.com>
Cc:     jassisinghbrar@...il.com, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ray Jui <ray.jui@...adcom.com>,
        Scott Branden <scott.branden@...adcom.com>,
        Russell King <linux@...linux.org.uk>,
        Rob Rice <rob.rice@...adcom.com>,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] ARM: dts: NSP: Add mailbox (PDC) to NSP

On Wed, Feb 22, 2017 at 3:42 PM, Steve Lin <steven.lin1@...adcom.com> wrote:
> Adds mailbox / PDC to NSP device tree.  Needs new compatibility string
> to differentiate from NS2 version.
>
> Signed-off-by: Steve Lin <steven.lin1@...adcom.com>
> ---
>  .../devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt          | 6 ++++--
>  arch/arm/boot/dts/bcm-nsp.dtsi                                   | 9 +++++++++

I believe it is preferred to have a separate patch for the binding
documentation.

Aside from that, it looks fine to me.

Thanks,
Jon

>  2 files changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt b/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt
> index 411ccf4..0f3ee81 100644
> --- a/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt
> +++ b/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt
> @@ -1,9 +1,11 @@
>  The PDC driver manages data transfer to and from various offload engines
>  on some Broadcom SoCs. An SoC may have multiple PDC hardware blocks. There is
> -one device tree entry per block.
> +one device tree entry per block.  On some chips, the PDC functionality is
> +handled by the FA2 (Northstar Plus).
>
>  Required properties:
> -- compatible : Should be "brcm,iproc-pdc-mbox".
> +- compatible : Should be "brcm,iproc-pdc-mbox" or "brcm,iproc-fa2-mbox" for
> +  FA2/Northstar Plus.
>  - reg: Should contain PDC registers location and length.
>  - interrupts: Should contain the IRQ line for the PDC.
>  - #mbox-cells: 1
> diff --git a/arch/arm/boot/dts/bcm-nsp.dtsi b/arch/arm/boot/dts/bcm-nsp.dtsi
> index 15f07f9..8b56d74 100644
> --- a/arch/arm/boot/dts/bcm-nsp.dtsi
> +++ b/arch/arm/boot/dts/bcm-nsp.dtsi
> @@ -227,6 +227,15 @@
>                         status = "disabled";
>                 };
>
> +               mailbox: mailbox@...00 {
> +                       compatible = "brcm,iproc-fa2-mbox";
> +                       reg = <0x25000 0x445>;
> +                       interrupts = <GIC_SPI 150 IRQ_TYPE_LEVEL_HIGH>;
> +                       #mbox-cells = <1>;
> +                       brcm,rx-status-len = <32>;
> +                       brcm,use-bcm-hdr;
> +               };
> +
>                 nand: nand@...00 {
>                         compatible = "brcm,nand-iproc", "brcm,brcmnand-v6.1";
>                         reg = <0x026000 0x600>,
> --
> 2.1.0
>