83 lines
1.8 KiB
Plaintext
83 lines
1.8 KiB
Plaintext
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Properties for an MDIO bus multiplexer consumer device
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This is a special case of MDIO mux when MDIO mux is defined as a consumer
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of a mux producer device. The mux producer can be of any type like mmio mux
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producer, gpio mux producer or generic register based mux producer.
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Required properties in addition to the MDIO Bus multiplexer properties:
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- compatible : should be "mmio-mux-multiplexer"
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- mux-controls : mux controller node to use for operating the mux
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- mdio-parent-bus : phandle to the parent MDIO bus.
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each child node of mdio bus multiplexer consumer device represent a mdio
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bus.
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for more information please refer
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Documentation/devicetree/bindings/mux/mux-controller.txt
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and Documentation/devicetree/bindings/net/mdio-mux.txt
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Example:
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In below example the Mux producer and consumer are separate nodes.
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&i2c0 {
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fpga@66 { // fpga connected to i2c
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compatible = "fsl,lx2160aqds-fpga", "fsl,fpga-qixis-i2c",
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"simple-mfd";
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reg = <0x66>;
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mux: mux-controller { // Mux Producer
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compatible = "reg-mux";
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#mux-control-cells = <1>;
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mux-reg-masks = <0x54 0xf8>, /* 0: reg 0x54, bits 7:3 */
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<0x54 0x07>; /* 1: reg 0x54, bits 2:0 */
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};
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};
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};
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mdio-mux-1 { // Mux consumer
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compatible = "mdio-mux-multiplexer";
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mux-controls = <&mux 0>;
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mdio-parent-bus = <&emdio1>;
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#address-cells = <1>;
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#size-cells = <0>;
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mdio@0 {
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reg = <0x0>;
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#address-cells = <1>;
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#size-cells = <0>;
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};
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mdio@8 {
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reg = <0x8>;
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#address-cells = <1>;
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#size-cells = <0>;
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};
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..
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..
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};
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mdio-mux-2 { // Mux consumer
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compatible = "mdio-mux-multiplexer";
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mux-controls = <&mux 1>;
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mdio-parent-bus = <&emdio2>;
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#address-cells = <1>;
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#size-cells = <0>;
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mdio@0 {
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reg = <0x0>;
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#address-cells = <1>;
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#size-cells = <0>;
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};
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mdio@1 {
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reg = <0x1>;
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#address-cells = <1>;
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#size-cells = <0>;
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};
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..
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..
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};
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