79 lines
2.1 KiB
YAML
79 lines
2.1 KiB
YAML
|
# SPDX-License-Identifier: GPL-2.0
|
||
|
|
%YAML 1.2
|
||
|
|
---
|
||
|
|
$id: http://devicetree.org/schemas/net/mdio-mux-mmioreg.yaml#
|
||
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
||
|
|
|
||
|
|
title: Properties for an MDIO bus multiplexer controlled by a memory-mapped device
|
||
|
|
|
||
|
|
maintainers:
|
||
|
|
- Andrew Lunn <andrew@lunn.ch>
|
||
|
|
|
||
|
|
description: |+
|
||
|
|
This is a special case of a MDIO bus multiplexer. A memory-mapped device,
|
||
|
|
like an FPGA, is used to control which child bus is connected. The mdio-mux
|
||
|
|
node must be a child of the memory-mapped device. The driver currently only
|
||
|
|
supports devices with 8, 16 or 32-bit registers.
|
||
|
|
|
||
|
|
allOf:
|
||
|
|
- $ref: /schemas/net/mdio-mux.yaml#
|
||
|
|
|
||
|
|
properties:
|
||
|
|
compatible:
|
||
|
|
items:
|
||
|
|
- const: mdio-mux-mmioreg
|
||
|
|
- const: mdio-mux
|
||
|
|
|
||
|
|
reg:
|
||
|
|
description: Contains the offset of the register that controls the bus
|
||
|
|
multiplexer. The size field in the 'reg' property is the size of register,
|
||
|
|
and must therefore be 1, 2, or 4.
|
||
|
|
maxItems: 1
|
||
|
|
|
||
|
|
mux-mask:
|
||
|
|
$ref: /schemas/types.yaml#/definitions/uint32
|
||
|
|
description: Contains an eight-bit mask that specifies which bits in the
|
||
|
|
register control the actual bus multiplexer. The 'reg' property of each
|
||
|
|
child mdio-mux node must be constrained by this mask.
|
||
|
|
|
||
|
|
required:
|
||
|
|
- compatible
|
||
|
|
- reg
|
||
|
|
- mux-mask
|
||
|
|
|
||
|
|
unevaluatedProperties: false
|
||
|
|
|
||
|
|
examples:
|
||
|
|
- |
|
||
|
|
mdio-mux@9 {
|
||
|
|
compatible = "mdio-mux-mmioreg", "mdio-mux";
|
||
|
|
mdio-parent-bus = <&xmdio0>;
|
||
|
|
#address-cells = <1>;
|
||
|
|
#size-cells = <0>;
|
||
|
|
reg = <9 1>; // BRDCFG1
|
||
|
|
mux-mask = <0x6>; // EMI2
|
||
|
|
|
||
|
|
mdio@0 { // Slot 1 XAUI (FM2)
|
||
|
|
reg = <0>;
|
||
|
|
#address-cells = <1>;
|
||
|
|
#size-cells = <0>;
|
||
|
|
|
||
|
|
phy_xgmii_slot1: ethernet-phy@4 {
|
||
|
|
compatible = "ethernet-phy-ieee802.3-c45";
|
||
|
|
reg = <4>;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
mdio@2 { // Slot 2 XAUI (FM1)
|
||
|
|
reg = <2>;
|
||
|
|
#address-cells = <1>;
|
||
|
|
#size-cells = <0>;
|
||
|
|
|
||
|
|
ethernet-phy@4 {
|
||
|
|
compatible = "ethernet-phy-ieee802.3-c45";
|
||
|
|
reg = <4>;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
};
|
||
|
|
...
|