xref: /linux/Documentation/devicetree/bindings/net/ti,dp83822.yaml (revision 3d0fe49454652117522f60bfbefb978ba0e5300b) 
1# SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause)
2# Copyright (C) 2020 Texas Instruments Incorporated
3%YAML 1.2
4---
5$id: http://devicetree.org/schemas/net/ti,dp83822.yaml#
6$schema: http://devicetree.org/meta-schemas/core.yaml#
7
8title: TI DP83822 ethernet PHY
9
10maintainers:
11  - Andrew Davis <afd@ti.com>
12
13description: |
14  The DP83822 is a low-power, single-port, 10/100 Mbps Ethernet PHY. It
15  provides all of the physical layer functions needed to transmit and receive
16  data over standard, twisted-pair cables or to connect to an external,
17  fiber-optic transceiver. Additionally, the DP83822 provides flexibility to
18  connect to a MAC through a standard MII, RMII, or RGMII interface
19
20  Specifications about the Ethernet PHY can be found at:
21    http://www.ti.com/lit/ds/symlink/dp83822i.pdf
22
23allOf:
24  - $ref: ethernet-phy.yaml#
25
26properties:
27  reg:
28    maxItems: 1
29
30  ti,link-loss-low:
31    type: boolean
32    description: |
33       DP83822 PHY in Fiber mode only.
34       Sets the DP83822 to detect a link drop condition when the signal goes
35       high.  If not set then link drop will occur when the signal goes low.
36       This property is only applicable if the fiber mode support is strapped
37       to on.
38
39  ti,fiber-mode:
40    type: boolean
41    description: |
42       DP83822 PHY only.
43       If present the DP83822 PHY is configured to operate in fiber mode
44       Fiber mode support can also be strapped. If the strap pin is not set
45       correctly or not set at all then this boolean can be used to enable it.
46       If the fiber mode is not strapped then signal detection for the PHY
47       is disabled.
48       In fiber mode, auto-negotiation is disabled and the PHY can only work in
49       100base-fx (full and half duplex) modes.
50
51  rx-internal-delay-ps:
52    description: |
53       DP83822 PHY only.
54       Setting this property to a non-zero number sets the RX internal delay
55       for the PHY.  The internal delay for the PHY is fixed to 3.5ns relative
56       to receive data.
57
58  tx-internal-delay-ps:
59    description: |
60       DP83822 PHY only.
61       Setting this property to a non-zero number sets the TX internal delay
62       for the PHY.  The internal delay for the PHY is fixed to 3.5ns relative
63       to transmit data.
64
65required:
66  - reg
67
68unevaluatedProperties: false
69
70examples:
71  - |
72    mdio0 {
73      #address-cells = <1>;
74      #size-cells = <0>;
75      ethphy0: ethernet-phy@0 {
76        reg = <0>;
77        rx-internal-delay-ps = <1>;
78        tx-internal-delay-ps = <1>;
79      };
80    };
81
82...
83