linux-kernel - Re: [PATCH v4 1/8] dt-bindings: Add Cavium Octeon Common Ethernet Interface.

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Date:   Wed, 29 Nov 2017 03:01:53 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     David Daney <david.daney@...ium.com>
Cc:     linux-mips@...ux-mips.org, ralf@...ux-mips.org,
        James Hogan <james.hogan@...s.com>, netdev@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devel@...verdev.osuosl.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org,
        "Steven J. Hill" <steven.hill@...ium.com>,
        devicetree@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Carlos Munoz <cmunoz@...ium.com>
Subject: Re: [PATCH v4 1/8] dt-bindings: Add Cavium Octeon Common Ethernet
 Interface.

On Tue, Nov 28, 2017 at 04:55:33PM -0800, David Daney wrote:
> From: Carlos Munoz <cmunoz@...ium.com>
> 
> Add bindings for Common Ethernet Interface (BGX) block.
> 
> Acked-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Carlos Munoz <cmunoz@...ium.com>
> Signed-off-by: Steven J. Hill <Steven.Hill@...ium.com>
> Signed-off-by: David Daney <david.daney@...ium.com>
> ---
>  .../devicetree/bindings/net/cavium-bgx.txt         | 61 ++++++++++++++++++++++
>  1 file changed, 61 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/cavium-bgx.txt
> 
> diff --git a/Documentation/devicetree/bindings/net/cavium-bgx.txt b/Documentation/devicetree/bindings/net/cavium-bgx.txt
> new file mode 100644
> index 000000000000..830c5f08dddd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/cavium-bgx.txt
> @@ -0,0 +1,61 @@
> +* Common Ethernet Interface (BGX) block
> +
> +Properties:
> +
> +- compatible: "cavium,octeon-7890-bgx": Compatibility with all cn7xxx SOCs.
> +
> +- reg: The base address of the BGX block.
> +
> +- #address-cells: Must be <1>.
> +
> +- #size-cells: Must be <0>.  BGX addresses have no size component.
> +
> +A BGX block has several children, each representing an Ethernet
> +interface.
> +
> +
> +* Ethernet Interface (BGX port) connects to PKI/PKO
> +
> +Properties:
> +
> +- compatible: "cavium,octeon-7890-bgx-port": Compatibility with all
> +	      cn7xxx SOCs.
> +
> +	      "cavium,octeon-7360-xcv": Compatibility with cn73xx SOCs
> +	      for RGMII.
> +
> +- reg: The index of the interface within the BGX block.
> +
> +Optional properties:
> +
> +- local-mac-address: Mac address for the interface.
> +
> +- phy-handle: phandle to the phy node connected to the interface.
> +
> +- phy-mode: described in ethernet.txt.
> +
> +- fixed-link: described in fixed-link.txt.
> +
> +Example:
> +
> +	ethernet-mac-nexus@...00e0000000 {
> +		compatible = "cavium,octeon-7890-bgx";
> +		reg = <0x00011800 0xe0000000 0x00000000 0x01000000>;

Hi David

In the probe function we have:

+       reg = of_get_property(pdev->dev.of_node, "reg", NULL);
+       addr = of_translate_address(pdev->dev.of_node, reg);
+       interface = (addr >> 24) & 0xf;
+       numa_node = (addr >> 36) & 0x7;

Is this documented somewhere? The numa_node is particularly
interesting. MMIO changes depends on what node this is in the cluster?

	Andrew