Properties for an MDIO bus multiplexer/switch controlled by GPIO pins. This is a special case of a MDIO bus multiplexer. One or more GPIO lines are used to control which child bus is connected. Required properties in addition to the generic multiplexer properties: - compatible : mdio-mux-gpio. - gpios : GPIO specifiers for each GPIO line. One or more must be specified. Example : /* The parent MDIO bus. */ smi1: mdio@1180000001900 { compatible = "cavium,octeon-3860-mdio"; #address-cells = <1>; #size-cells = <0>; reg = <0x11800 0x00001900 0x0 0x40>; }; /* An NXP sn74cbtlv3253 dual 1-of-4 switch controlled by a pair of GPIO lines. Child busses 2 and 3 populated with 4 PHYs each. */ mdio-mux { compatible = "mdio-mux-gpio"; gpios = <&gpio1 3 0>, <&gpio1 4 0>; mdio-parent-bus = <&smi1>; #address-cells = <1>; #size-cells = <0>; mdio@2 { reg = <2>; #address-cells = <1>; #size-cells = <0>; phy11: ethernet-phy@1 { reg = <1>; marvell,reg-init = <3 0x10 0 0x5777>, <3 0x11 0 0x00aa>, <3 0x12 0 0x4105>, <3 0x13 0 0x0a60>; interrupt-parent = <&gpio>; interrupts = <10 8>; /* Pin 10, active low */ }; phy12: ethernet-phy@2 { reg = <2>; marvell,reg-init = <3 0x10 0 0x5777>, <3 0x11 0 0x00aa>, <3 0x12 0 0x4105>, <3 0x13 0 0x0a60>; interrupt-parent = <&gpio>; interrupts = <10 8>; /* Pin 10, active low */ }; phy13: ethernet-phy@3 { reg = <3>; marvell,reg-init = <3 0x10 0 0x5777>, <3 0x11 0 0x00aa>, <3 0x12 0 0x4105>, <3 0x13 0 0x0a60>; interrupt-parent = <&gpio>; interrupts = <10 8>; /* Pin 10, active low */ }; phy14: ethernet-phy@4 { reg = <4>; marvell,reg-init = <3 0x10 0 0x5777>, <3 0x11 0 0x00aa>, <3 0x12 0 0x4105>, <3 0x13 0 0x0a60>; interrupt-parent = <&gpio>; interrupts = <10 8>; /* Pin 10, active low */ }; }; mdio@3 { reg = <3>; #address-cells = <1>; #size-cells = <0>; phy21: ethernet-phy@1 { reg = <1>; marvell,reg-init = <3 0x10 0 0x5777>, <3 0x11 0 0x00aa>, <3 0x12 0 0x4105>, <3 0x13 0 0x0a60>; interrupt-parent = <&gpio>; interrupts = <12 8>; /* Pin 12, active low */ }; phy22: ethernet-phy@2 { reg = <2>; marvell,reg-init = <3 0x10 0 0x5777>, <3 0x11 0 0x00aa>, <3 0x12 0 0x4105>, <3 0x13 0 0x0a60>; interrupt-parent = <&gpio>; interrupts = <12 8>; /* Pin 12, active low */ }; phy23: ethernet-phy@3 { reg = <3>; marvell,reg-init = <3 0x10 0 0x5777>, <3 0x11 0 0x00aa>, <3 0x12 0 0x4105>, <3 0x13 0 0x0a60>; interrupt-parent = <&gpio>; interrupts = <12 8>; /* Pin 12, active low */ }; phy24: ethernet-phy@4 { reg = <4>; marvell,reg-init = <3 0x10 0 0x5777>, <3 0x11 0 0x00aa>, <3 0x12 0 0x4105>, <3 0x13 0 0x0a60>; interrupt-parent = <&gpio>; interrupts = <12 8>; /* Pin 12, active low */ }; }; };