xref: /openbmc/linux/Documentation/devicetree/bindings/net/dsa/ar9331.txt (revision 9cc115d8)

Atheros AR9331 built-in switch
=============================

It is a switch built-in to Atheros AR9331 WiSoC and addressable over internal
MDIO bus. All PHYs are built-in as well.

Required properties:

 - compatible: should be: "qca,ar9331-switch"
 - reg: Address on the MII bus for the switch.
 - resets : Must contain an entry for each entry in reset-names.
 - reset-names : Must include the following entries: "switch"
 - interrupt-parent: Phandle to the parent interrupt controller
 - interrupts: IRQ line for the switch
 - interrupt-controller: Indicates the switch is itself an interrupt
   controller. This is used for the PHY interrupts.
 - #interrupt-cells: must be 1
 - mdio: Container of PHY and devices on the switches MDIO bus.

See Documentation/devicetree/bindings/net/dsa/dsa.txt for a list of additional
required and optional properties.
Examples:

eth0: ethernet@19000000 {
	compatible = "qca,ar9330-eth";
	reg = <0x19000000 0x200>;
	interrupts = <4>;

	resets = <&rst 9>, <&rst 22>;
	reset-names = "mac", "mdio";
	clocks = <&pll ATH79_CLK_AHB>, <&pll ATH79_CLK_AHB>;
	clock-names = "eth", "mdio";

	phy-mode = "mii";
	phy-handle = <&phy_port4>;
};

eth1: ethernet@1a000000 {
	compatible = "qca,ar9330-eth";
	reg = <0x1a000000 0x200>;
	interrupts = <5>;
	resets = <&rst 13>, <&rst 23>;
	reset-names = "mac", "mdio";
	clocks = <&pll ATH79_CLK_AHB>, <&pll ATH79_CLK_AHB>;
	clock-names = "eth", "mdio";

	phy-mode = "gmii";

	fixed-link {
		speed = <1000>;
		full-duplex;
	};

	mdio {
		#address-cells = <1>;
		#size-cells = <0>;

		switch10: switch@10 {
			#address-cells = <1>;
			#size-cells = <0>;

			compatible = "qca,ar9331-switch";
			reg = <0x10>;
			resets = <&rst 8>;
			reset-names = "switch";

			interrupt-parent = <&miscintc>;
			interrupts = <12>;

			interrupt-controller;
			#interrupt-cells = <1>;

			ports {
				#address-cells = <1>;
				#size-cells = <0>;

				switch_port0: port@0 {
					reg = <0x0>;
					ethernet = <&eth1>;

					phy-mode = "gmii";

					fixed-link {
						speed = <1000>;
						full-duplex;
					};
				};

				switch_port1: port@1 {
					reg = <0x1>;
					phy-handle = <&phy_port0>;
					phy-mode = "internal";
				};

				switch_port2: port@2 {
					reg = <0x2>;
					phy-handle = <&phy_port1>;
					phy-mode = "internal";
				};

				switch_port3: port@3 {
					reg = <0x3>;
					phy-handle = <&phy_port2>;
					phy-mode = "internal";
				};

				switch_port4: port@4 {
					reg = <0x4>;
					phy-handle = <&phy_port3>;
					phy-mode = "internal";
				};
			};

			mdio {
				#address-cells = <1>;
				#size-cells = <0>;

				interrupt-parent = <&switch10>;

				phy_port0: phy@0 {
					reg = <0x0>;
					interrupts = <0>;
				};

				phy_port1: phy@1 {
					reg = <0x1>;
					interrupts = <0>;
				};

				phy_port2: phy@2 {
					reg = <0x2>;
					interrupts = <0>;
				};

				phy_port3: phy@3 {
					reg = <0x3>;
					interrupts = <0>;
				};

				phy_port4: phy@4 {
					reg = <0x4>;
					interrupts = <0>;
				};
			};
		};
	};
};