1Properties for an MDIO bus multiplexer consumer device 2 3This is a special case of MDIO mux when MDIO mux is defined as a consumer 4of a mux producer device. The mux producer can be of any type like mmio mux 5producer, gpio mux producer or generic register based mux producer. 6 7Required properties in addition to the MDIO Bus multiplexer properties: 8 9- compatible : should be "mmio-mux-multiplexer" 10- mux-controls : mux controller node to use for operating the mux 11- mdio-parent-bus : phandle to the parent MDIO bus. 12 13each child node of mdio bus multiplexer consumer device represent a mdio 14bus. 15 16for more information please refer 17Documentation/devicetree/bindings/mux/mux-controller.txt 18and Documentation/devicetree/bindings/net/mdio-mux.txt 19 20Example: 21In below example the Mux producer and consumer are separate nodes. 22 23&i2c0 { 24 fpga@66 { // fpga connected to i2c 25 compatible = "fsl,lx2160aqds-fpga", "fsl,fpga-qixis-i2c", 26 "simple-mfd"; 27 reg = <0x66>; 28 29 mux: mux-controller { // Mux Producer 30 compatible = "reg-mux"; 31 #mux-control-cells = <1>; 32 mux-reg-masks = <0x54 0xf8>, /* 0: reg 0x54, bits 7:3 */ 33 <0x54 0x07>; /* 1: reg 0x54, bits 2:0 */ 34 }; 35 }; 36}; 37 38mdio-mux-1 { // Mux consumer 39 compatible = "mdio-mux-multiplexer"; 40 mux-controls = <&mux 0>; 41 mdio-parent-bus = <&emdio1>; 42 #address-cells = <1>; 43 #size-cells = <0>; 44 45 mdio@0 { 46 reg = <0x0>; 47 #address-cells = <1>; 48 #size-cells = <0>; 49 }; 50 51 mdio@8 { 52 reg = <0x8>; 53 #address-cells = <1>; 54 #size-cells = <0>; 55 }; 56 57 .. 58 .. 59}; 60 61mdio-mux-2 { // Mux consumer 62 compatible = "mdio-mux-multiplexer"; 63 mux-controls = <&mux 1>; 64 mdio-parent-bus = <&emdio2>; 65 #address-cells = <1>; 66 #size-cells = <0>; 67 68 mdio@0 { 69 reg = <0x0>; 70 #address-cells = <1>; 71 #size-cells = <0>; 72 }; 73 74 mdio@1 { 75 reg = <0x1>; 76 #address-cells = <1>; 77 #size-cells = <0>; 78 }; 79 80 .. 81 .. 82}; 83