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- Marvell Distributed Switch Architecture Device Tree Bindings
- ------------------------------------------------------------
- Required properties:
- - compatible : Should be "marvell,dsa"
- - #address-cells : Must be 2, first cell is the address on the MDIO bus
- and second cell is the address in the switch tree.
- Second cell is used only when cascading/chaining.
- - #size-cells : Must be 0
- - dsa,ethernet : Should be a phandle to a valid Ethernet device node
- - dsa,mii-bus : Should be a phandle to a valid MDIO bus device node
- Optionnal properties:
- - interrupts : property with a value describing the switch
- interrupt number (not supported by the driver)
- A DSA node can contain multiple switch chips which are therefore child nodes of
- the parent DSA node. The maximum number of allowed child nodes is 4
- (DSA_MAX_SWITCHES).
- Each of these switch child nodes should have the following required properties:
- - reg : Describes the switch address on the MII bus
- - #address-cells : Must be 1
- - #size-cells : Must be 0
- A switch may have multiple "port" children nodes
- Each port children node must have the following mandatory properties:
- - reg : Describes the port address in the switch
- - label : Describes the label associated with this port, special
- labels are "cpu" to indicate a CPU port and "dsa" to
- indicate an uplink/downlink port.
- Note that a port labelled "dsa" will imply checking for the uplink phandle
- described below.
- Optionnal property:
- - link : Should be a phandle to another switch's DSA port.
- This property is only used when switches are being
- chained/cascaded together.
- Example:
- dsa@0 {
- compatible = "marvell,dsa";
- #address-cells = <2>;
- #size-cells = <0>;
- interrupts = <10>;
- dsa,ethernet = <ðernet0>;
- dsa,mii-bus = <&mii_bus0>;
- switch@0 {
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <16 0>; /* MDIO address 16, switch 0 in tree */
- port@0 {
- reg = <0>;
- label = "lan1";
- };
- port@1 {
- reg = <1>;
- label = "lan2";
- };
- port@5 {
- reg = <5>;
- label = "cpu";
- };
- switch0uplink: port@6 {
- reg = <6>;
- label = "dsa";
- link = <&switch1uplink>;
- };
- };
- switch@1 {
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <17 1>; /* MDIO address 17, switch 1 in tree */
- switch1uplink: port@0 {
- reg = <0>;
- label = "dsa";
- link = <&switch0uplink>;
- };
- };
- };
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