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-Mediatek MT7530 Ethernet switch
-================================
-
-Required properties:
-
-- compatible: may be compatible = "mediatek,mt7530"
- or compatible = "mediatek,mt7621"
- or compatible = "mediatek,mt7531"
-- #address-cells: Must be 1.
-- #size-cells: Must be 0.
-- mediatek,mcm: Boolean; if defined, indicates that either MT7530 is the part
- on multi-chip module belong to MT7623A has or the remotely standalone
- chip as the function MT7623N reference board provided for.
-
-If compatible mediatek,mt7530 is set then the following properties are required
-
-- core-supply: Phandle to the regulator node necessary for the core power.
-- io-supply: Phandle to the regulator node necessary for the I/O power.
- See Documentation/devicetree/bindings/regulator/mt6323-regulator.txt
- for details for the regulator setup on these boards.
-
-If the property mediatek,mcm isn't defined, following property is required
-
-- reset-gpios: Should be a gpio specifier for a reset line.
-
-Else, following properties are required
-
-- resets : Phandle pointing to the system reset controller with
- line index for the ethsys.
-- reset-names : Should be set to "mcm".
-
-Required properties for the child nodes within ports container:
-
-- reg: Port address described must be 6 for CPU port and from 0 to 5 for
- user ports.
-- phy-mode: String, the following values are acceptable for port labeled
- "cpu":
- If compatible mediatek,mt7530 or mediatek,mt7621 is set,
- must be either "trgmii" or "rgmii"
- If compatible mediatek,mt7531 is set,
- must be either "sgmii", "1000base-x" or "2500base-x"
-
-Port 5 of mt7530 and mt7621 switch is muxed between:
-1. GMAC5: GMAC5 can interface with another external MAC or PHY.
-2. PHY of port 0 or port 4: PHY interfaces with an external MAC like 2nd GMAC
- of the SOC. Used in many setups where port 0/4 becomes the WAN port.
- Note: On a MT7621 SOC with integrated switch: 2nd GMAC can only connected to
- GMAC5 when the gpios for RGMII2 (GPIO 22-33) are not used and not
- connected to external component!
-
-Port 5 modes/configurations:
-1. Port 5 is disabled and isolated: An external phy can interface to the 2nd
- GMAC of the SOC.
- In the case of a build-in MT7530 switch, port 5 shares the RGMII bus with 2nd
- GMAC and an optional external phy. Mind the GPIO/pinctl settings of the SOC!
-2. Port 5 is muxed to PHY of port 0/4: Port 0/4 interfaces with 2nd GMAC.
- It is a simple MAC to PHY interface, port 5 needs to be setup for xMII mode
- and RGMII delay.
-3. Port 5 is muxed to GMAC5 and can interface to an external phy.
- Port 5 becomes an extra switch port.
- Only works on platform where external phy TX<->RX lines are swapped.
- Like in the Ubiquiti ER-X-SFP.
-4. Port 5 is muxed to GMAC5 and interfaces with the 2nd GAMC as 2nd CPU port.
- Currently a 2nd CPU port is not supported by DSA code.
-
-Depending on how the external PHY is wired:
-1. normal: The PHY can only connect to 2nd GMAC but not to the switch
-2. swapped: RGMII TX, RX are swapped; external phy interface with the switch as
- a ethernet port. But can't interface to the 2nd GMAC.
-
-Based on the DT the port 5 mode is configured.
-
-Driver tries to lookup the phy-handle of the 2nd GMAC of the master device.
-When phy-handle matches PHY of port 0 or 4 then port 5 set-up as mode 2.
-phy-mode must be set, see also example 2 below!
- * mt7621: phy-mode = "rgmii-txid";
- * mt7623: phy-mode = "rgmii";
-
-Optional properties:
-
-- gpio-controller: Boolean; if defined, MT7530's LED controller will run on
- GPIO mode.
-- #gpio-cells: Must be 2 if gpio-controller is defined.
-- interrupt-controller: Boolean; Enables the internal interrupt controller.
-
-If interrupt-controller is defined, the following properties are required.
-
-- #interrupt-cells: Must be 1.
-- interrupts: Parent interrupt for the interrupt controller.
-
-See Documentation/devicetree/bindings/net/dsa/dsa.txt for a list of additional
-required, optional properties and how the integrated switch subnodes must
-be specified.
-
-Example:
-
- &mdio0 {
- switch@0 {
- compatible = "mediatek,mt7530";
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <0>;
-
- core-supply = <&mt6323_vpa_reg>;
- io-supply = <&mt6323_vemc3v3_reg>;
- reset-gpios = <&pio 33 0>;
-
- ports {
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <0>;
- port@0 {
- reg = <0>;
- label = "lan0";
- };
-
- port@1 {
- reg = <1>;
- label = "lan1";
- };
-
- port@2 {
- reg = <2>;
- label = "lan2";
- };
-
- port@3 {
- reg = <3>;
- label = "lan3";
- };
-
- port@4 {
- reg = <4>;
- label = "wan";
- };
-
- port@6 {
- reg = <6>;
- label = "cpu";
- ethernet = <&gmac0>;
- phy-mode = "trgmii";
- fixed-link {
- speed = <1000>;
- full-duplex;
- };
- };
- };
- };
- };
-
-Example 2: MT7621: Port 4 is WAN port: 2nd GMAC -> Port 5 -> PHY port 4.
-
-&eth {
- gmac0: mac@0 {
- compatible = "mediatek,eth-mac";
- reg = <0>;
- phy-mode = "rgmii";
-
- fixed-link {
- speed = <1000>;
- full-duplex;
- pause;
- };
- };
-
- gmac1: mac@1 {
- compatible = "mediatek,eth-mac";
- reg = <1>;
- phy-mode = "rgmii-txid";
- phy-handle = <&phy4>;
- };
-
- mdio: mdio-bus {
- #address-cells = <1>;
- #size-cells = <0>;
-
- /* Internal phy */
- phy4: ethernet-phy@4 {
- reg = <4>;
- };
-
- mt7530: switch@1f {
- compatible = "mediatek,mt7621";
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <0x1f>;
- pinctrl-names = "default";
- mediatek,mcm;
-
- resets = <&rstctrl 2>;
- reset-names = "mcm";
-
- 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";
- };
-
- port@3 {
- reg = <3>;
- label = "lan3";
- };
-
-/* Commented out. Port 4 is handled by 2nd GMAC.
- port@4 {
- reg = <4>;
- label = "lan4";
- };
-*/
-
- cpu_port0: port@6 {
- reg = <6>;
- label = "cpu";
- ethernet = <&gmac0>;
- phy-mode = "rgmii";
-
- fixed-link {
- speed = <1000>;
- full-duplex;
- pause;
- };
- };
- };
- };
- };
-};
-
-Example 3: MT7621: Port 5 is connected to external PHY: Port 5 -> external PHY.
-
-&eth {
- gmac0: mac@0 {
- compatible = "mediatek,eth-mac";
- reg = <0>;
- phy-mode = "rgmii";
-
- fixed-link {
- speed = <1000>;
- full-duplex;
- pause;
- };
- };
-
- mdio: mdio-bus {
- #address-cells = <1>;
- #size-cells = <0>;
-
- /* External phy */
- ephy5: ethernet-phy@7 {
- reg = <7>;
- };
-
- mt7530: switch@1f {
- compatible = "mediatek,mt7621";
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <0x1f>;
- pinctrl-names = "default";
- mediatek,mcm;
-
- resets = <&rstctrl 2>;
- reset-names = "mcm";
-
- 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";
- };
-
- port@3 {
- reg = <3>;
- label = "lan3";
- };
-
- port@4 {
- reg = <4>;
- label = "lan4";
- };
-
- port@5 {
- reg = <5>;
- label = "lan5";
- phy-mode = "rgmii";
- phy-handle = <&ephy5>;
- };
-
- cpu_port0: port@6 {
- reg = <6>;
- label = "cpu";
- ethernet = <&gmac0>;
- phy-mode = "rgmii";
-
- fixed-link {
- speed = <1000>;
- full-duplex;
- pause;
- };
- };
- };
- };
- };
-};
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