-Marvell Distributed Switch Architecture Device Tree Bindings
-------------------------------------------------------------
+Distributed Switch Architecture Device Tree Bindings
+----------------------------------------------------
+
+Two bindings exist, one of which has been deprecated due to
+limitations.
+
+Current Binding
+---------------
+
+Switches are true Linux devices and can be probes by any means. Once
+probed, they register to the DSA framework, passing a node
+pointer. This node is expected to fulfil the following binding, and
+may contain additional properties as required by the device it is
+embedded within.
+
+Required properties:
+
+- ports : A container for child nodes representing switch ports.
+
+Optional properties:
+
+- dsa,member : A two element list indicates which DSA cluster, and position
+ within the cluster a switch takes. <0 0> is cluster 0,
+ switch 0. <0 1> is cluster 0, switch 1. <1 0> is cluster 1,
+ switch 0. A switch not part of any cluster (single device
+ hanging off a CPU port) must not specify this property
+
+The ports container has the following properties
+
+Required properties:
+
+- #address-cells : Must be 1
+- #size-cells : Must be 0
+
+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, which
+ will become the netdev name. Special labels are
+ "cpu" to indicate a CPU port and "dsa" to
+ indicate an uplink/downlink port between switches in
+ the cluster.
+
+A port labelled "dsa" has the following mandatory property:
+
+- link : Should be a list of phandles to other switch's DSA
+ port. This port is used as the outgoing port
+ towards the phandle ports. The full routing
+ information must be given, not just the one hop
+ routes to neighbouring switches.
+
+A port labelled "cpu" has the following mandatory property:
+
+- ethernet : Should be a phandle to a valid Ethernet device node.
+ This host device is what the switch port is
+ connected to.
+
+Port child nodes may also contain the following optional standardised
+properties, described in binding documents:
+
+- phy-handle : Phandle to a PHY on an MDIO bus. See
+ Documentation/devicetree/bindings/net/ethernet.txt
+ for details.
+
+- phy-mode : See
+ Documentation/devicetree/bindings/net/ethernet.txt
+ for details.
+
+- fixed-link : Fixed-link subnode describing a link to a non-MDIO
+ managed entity. See
+ Documentation/devicetree/bindings/net/fixed-link.txt
+ for details.
+
+Example
+
+The following example shows three switches on three MDIO busses,
+linked into one DSA cluster.
+
+&mdio1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ switch0: switch0@0 {
+ compatible = "marvell,mv88e6085";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+
+ dsa,member = <0 0>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ port@0 {
+ reg = <0>;
+ label = "lan0";
+ };
+
+ port@1 {
+ reg = <1>;
+ label = "lan1";
+ };
+
+ port@2 {
+ reg = <2>;
+ label = "lan2";
+ };
+
+ switch0port5: port@5 {
+ reg = <5>;
+ label = "dsa";
+ phy-mode = "rgmii-txid";
+ link = <&switch1port6
+ &switch2port9>;
+ fixed-link {
+ speed = <1000>;
+ full-duplex;
+ };
+ };
+
+ port@6 {
+ reg = <6>;
+ label = "cpu";
+ ethernet = <&fec1>;
+ fixed-link {
+ speed = <100>;
+ full-duplex;
+ };
+ };
+ };
+ };
+};
+
+&mdio2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ switch1: switch1@0 {
+ compatible = "marvell,mv88e6085";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+
+ dsa,member = <0 1>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ port@0 {
+ reg = <0>;
+ label = "lan3";
+ phy-handle = <&switch1phy0>;
+ };
+
+ port@1 {
+ reg = <1>;
+ label = "lan4";
+ phy-handle = <&switch1phy1>;
+ };
+
+ port@2 {
+ reg = <2>;
+ label = "lan5";
+ phy-handle = <&switch1phy2>;
+ };
+
+ switch1port5: port@5 {
+ reg = <5>;
+ label = "dsa";
+ link = <&switch2port9>;
+ phy-mode = "rgmii-txid";
+ fixed-link {
+ speed = <1000>;
+ full-duplex;
+ };
+ };
+
+ switch1port6: port@6 {
+ reg = <6>;
+ label = "dsa";
+ phy-mode = "rgmii-txid";
+ link = <&switch0port5>;
+ fixed-link {
+ speed = <1000>;
+ full-duplex;
+ };
+ };
+ };
+ mdio-bus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ switch1phy0: switch1phy0@0 {
+ reg = <0>;
+ };
+ switch1phy1: switch1phy0@1 {
+ reg = <1>;
+ };
+ switch1phy2: switch1phy0@2 {
+ reg = <2>;
+ };
+ };
+ };
+};
+
+&mdio4 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ switch2: switch2@0 {
+ compatible = "marvell,mv88e6085";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+
+ dsa,member = <0 2>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ port@0 {
+ reg = <0>;
+ label = "lan6";
+ };
+
+ port@1 {
+ reg = <1>;
+ label = "lan7";
+ };
+
+ port@2 {
+ reg = <2>;
+ label = "lan8";
+ };
+
+ port@3 {
+ reg = <3>;
+ label = "optical3";
+ fixed-link {
+ speed = <1000>;
+ full-duplex;
+ link-gpios = <&gpio6 2
+ GPIO_ACTIVE_HIGH>;
+ };
+ };
+
+ port@4 {
+ reg = <4>;
+ label = "optical4";
+ fixed-link {
+ speed = <1000>;
+ full-duplex;
+ link-gpios = <&gpio6 3
+ GPIO_ACTIVE_HIGH>;
+ };
+ };
+
+ switch2port9: port@9 {
+ reg = <9>;
+ label = "dsa";
+ phy-mode = "rgmii-txid";
+ link = <&switch1port5
+ &switch0port5>;
+ fixed-link {
+ speed = <1000>;
+ full-duplex;
+ };
+ };
+ };
+ };
+};
+
+Deprecated Binding
+------------------
+
+The deprecated binding makes use of a platform device to represent the
+switches. The switches themselves are not Linux devices, and make use
+of an MDIO bus for management.
Required properties:
- compatible : Should be "marvell,dsa"
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff