mdio-mux-mmioreg.yaml

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    1 # SPDX-License-Identifier: GPL-2.0
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/net/mdio-mux-mmioreg.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Properties for an MDIO bus multiplexer controlled by a memory-mapped device
    8 
    9 maintainers:
   10   - Andrew Lunn <andrew@lunn.ch>
   11 
   12 description: |+
   13   This is a special case of a MDIO bus multiplexer.  A memory-mapped device,
   14   like an FPGA, is used to control which child bus is connected.  The mdio-mux
   15   node must be a child of the memory-mapped device.  The driver currently only
   16   supports devices with 8, 16 or 32-bit registers.
   17 
   18 allOf:
   19   - $ref: /schemas/net/mdio-mux.yaml#
   20 
   21 properties:
   22   compatible:
   23     items:
   24       - const: mdio-mux-mmioreg
   25       - const: mdio-mux
   26 
   27   reg:
   28     description: Contains the offset of the register that controls the bus
   29       multiplexer. The size field in the 'reg' property is the size of register,
   30       and must therefore be 1, 2, or 4.
   31     maxItems: 1
   32 
   33   mux-mask:
   34     $ref: /schemas/types.yaml#/definitions/uint32
   35     description: Contains an eight-bit mask that specifies which bits in the
   36       register control the actual bus multiplexer.  The 'reg' property of each
   37       child mdio-mux node must be constrained by this mask.
   38 
   39 required:
   40   - compatible
   41   - reg
   42   - mux-mask
   43 
   44 unevaluatedProperties: false
   45 
   46 examples:
   47   - |
   48     mdio-mux@9 {
   49         compatible = "mdio-mux-mmioreg", "mdio-mux";
   50         mdio-parent-bus = <&xmdio0>;
   51         #address-cells = <1>;
   52         #size-cells = <0>;
   53         reg = <9 1>; // BRDCFG1
   54         mux-mask = <0x6>; // EMI2
   55 
   56         mdio@0 {  // Slot 1 XAUI (FM2)
   57             reg = <0>;
   58             #address-cells = <1>;
   59             #size-cells = <0>;
   60 
   61             phy_xgmii_slot1: ethernet-phy@4 {
   62                 compatible = "ethernet-phy-ieee802.3-c45";
   63                 reg = <4>;
   64             };
   65         };
   66 
   67         mdio@2 {  // Slot 2 XAUI (FM1)
   68             reg = <2>;
   69             #address-cells = <1>;
   70             #size-cells = <0>;
   71 
   72             ethernet-phy@4 {
   73                 compatible = "ethernet-phy-ieee802.3-c45";
   74                 reg = <4>;
   75             };
   76         };
   77     };
   78 ...

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/net/mdio-mux-mmioreg.yaml

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/net/mdio-mux-mmioreg.yaml