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dt-bindings: net: Add bindings for mdio mux consumers

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When we use the bindings defined in Documentation/devicetree/bindings/mux
to define mdio mux in producer and consumer terms, it results in two
devices. one is mux producer and other is mux consumer.

Add the bindings needed for Mdio mux consumer devices.

Signed-off-by: Pankaj Bansal <pankaj.bansal@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pankaj Bansal 2019-02-25 06:16:53 +00:00 committed by David S. Miller
parent 24ba14406c
commit 43185c3b82
1 changed files with 82 additions and 0 deletions
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Documentation/devicetree/bindings/net/mdio-mux-multiplexer.txt Normal file
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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>;
};
..
..
};