Commit 8c5ad1d6 authored by Andrew Lunn's avatar Andrew Lunn Committed by David S. Miller

net: dsa: Document new binding

Add the new binding to the documentation of the existing binding.
Mark the old binding as deprecated.
Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: default avatarVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9dff6733
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: Required properties:
- compatible : Should be "marvell,dsa" - compatible : Should be "marvell,dsa"
......
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