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Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/net/mdio-mux-multiplexer.txt | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/mdio-mux-multiplexer.txt b/Documentation/devicetree/bindings/net/mdio-mux-multiplexer.txt new file mode 100644 index 000000000000..534e38058fe0 --- /dev/null +++ b/Documentation/devicetree/bindings/net/mdio-mux-multiplexer.txt @@ -0,0 +1,82 @@ +Properties for an MDIO bus multiplexer consumer device + +This is a special case of MDIO mux when MDIO mux is defined as a consumer +of a mux producer device. The mux producer can be of any type like mmio mux +producer, gpio mux producer or generic register based mux producer. + +Required properties in addition to the MDIO Bus multiplexer properties: + +- compatible : should be "mmio-mux-multiplexer" +- mux-controls : mux controller node to use for operating the mux +- mdio-parent-bus : phandle to the parent MDIO bus. + +each child node of mdio bus multiplexer consumer device represent a mdio +bus. + +for more information please refer +Documentation/devicetree/bindings/mux/mux-controller.txt +and Documentation/devicetree/bindings/net/mdio-mux.txt + +Example: +In below example the Mux producer and consumer are separate nodes. + +&i2c0 { + fpga@66 { // fpga connected to i2c + compatible = "fsl,lx2160aqds-fpga", "fsl,fpga-qixis-i2c", + "simple-mfd"; + reg = <0x66>; + + mux: mux-controller { // Mux Producer + compatible = "reg-mux"; + #mux-control-cells = <1>; + mux-reg-masks = <0x54 0xf8>, /* 0: reg 0x54, bits 7:3 */ + <0x54 0x07>; /* 1: reg 0x54, bits 2:0 */ + }; + }; +}; + +mdio-mux-1 { // Mux consumer + compatible = "mdio-mux-multiplexer"; + mux-controls = <&mux 0>; + mdio-parent-bus = <&emdio1>; + #address-cells = <1>; + #size-cells = <0>; + + mdio@0 { + reg = <0x0>; + #address-cells = <1>; + #size-cells = <0>; + }; + + mdio@8 { + reg = <0x8>; + #address-cells = <1>; + #size-cells = <0>; + }; + + .. + .. +}; + +mdio-mux-2 { // Mux consumer + compatible = "mdio-mux-multiplexer"; + mux-controls = <&mux 1>; + mdio-parent-bus = <&emdio2>; + #address-cells = <1>; + #size-cells = <0>; + + mdio@0 { + reg = <0x0>; + #address-cells = <1>; + #size-cells = <0>; + }; + + mdio@1 { + reg = <0x1>; + #address-cells = <1>; + #size-cells = <0>; + }; + + .. + .. +}; |