Commit 00af103d authored by Sean Anderson's avatar Sean Anderson Committed by David S. Miller
Browse files

dt-bindings: net: Add Lynx PCS binding 



This binding is fairly bare-bones for now, since the Lynx driver doesn't
parse any properties (or match based on the compatible). We just need it
in order to prevent the PCS nodes from having phy devices attached to
them. This is not really a problem, but it is a bit inefficient.

This binding is really for three separate PCSs (SGMII, QSGMII, and XFI).
However, the driver treats all of them the same. This works because the
SGMII and XFI devices typically use the same address, and the SerDes
driver (or RCW) muxes between them. The QSGMII PCSs have the same
register layout as the SGMII PCSs. To do things properly, we'd probably
do something like

	ethernet-pcs@0 {
		#pcs-cells = <1>;
		compatible = "fsl,lynx-pcs";
		reg = <0>, <1>, <2>, <3>;
	};

but that would add complexity, and we can describe the hardware just
fine using separate PCSs for now.

Signed-off-by: default avatarSean Anderson <sean.anderson@seco.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 76025ee5

Documentation/devicetree/bindings/net/pcs/fsl,lynx-pcs.yaml

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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause

%YAML 1.2

---

$id: http://devicetree.org/schemas/net/pcs/fsl,lynx-pcs.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: NXP Lynx PCS



maintainers:

  - Ioana Ciornei <ioana.ciornei@nxp.com>



description: |

  NXP Lynx 10G and 28G SerDes have Ethernet PCS devices which can be used as

  protocol controllers. They are accessible over the Ethernet interface's MDIO

  bus.



properties:

  compatible:

    const: fsl,lynx-pcs



  reg:

    maxItems: 1



required:

  - compatible

  - reg



additionalProperties: false



examples:

  - |

    mdio-bus {

      #address-cells = <1>;

      #size-cells = <0>;



      qsgmii_pcs1: ethernet-pcs@1 {

        compatible = "fsl,lynx-pcs";

        reg = <1>;

      };

    };