83 lines
1.8 KiB
Plaintext
83 lines
1.8 KiB
Plaintext
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>;
|
|
};
|
|
|
|
..
|
|
..
|
|
};
|