xref: /linux/Documentation/devicetree/bindings/net/ti,dp83867.yaml (revision a4eb44a6435d6d8f9e642407a4a06f65eb90ca04) 
1# SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause)
2# Copyright (C) 2019 Texas Instruments Incorporated
3%YAML 1.2
4---
5$id: "http://devicetree.org/schemas/net/ti,dp83867.yaml#"
6$schema: "http://devicetree.org/meta-schemas/core.yaml#"
7
8title: TI DP83867 ethernet PHY
9
10allOf:
11  - $ref: "ethernet-controller.yaml#"
12
13maintainers:
14  - Dan Murphy <dmurphy@ti.com>
15
16description: |
17  The DP83867 device is a robust, low power, fully featured Physical Layer
18  transceiver with integrated PMD sublayers to support 10BASE-Te, 100BASE-TX
19  and 1000BASE-T Ethernet protocols.
20
21  The DP83867 is designed for easy implementation of 10/100/1000 Mbps Ethernet
22  LANs. It interfaces directly to twisted pair media via an external
23  transformer. This device interfaces directly to the MAC layer through the
24  IEEE 802.3 Standard Media Independent Interface (MII), the IEEE 802.3 Gigabit
25  Media Independent Interface (GMII) or Reduced GMII (RGMII).
26
27  Specifications about the Ethernet PHY can be found at:
28    https://www.ti.com/lit/gpn/dp83867ir
29
30properties:
31  reg:
32    maxItems: 1
33
34  ti,min-output-impedance:
35    type: boolean
36    description: |
37       MAC Interface Impedance control to set the programmable output impedance
38       to a minimum value (35 ohms).
39
40  ti,max-output-impedance:
41    type: boolean
42    description: |
43      MAC Interface Impedance control to set the programmable output impedance
44      to a maximum value (70 ohms).
45      Note: ti,min-output-impedance and ti,max-output-impedance are mutually
46        exclusive. When both properties are present ti,max-output-impedance
47        takes precedence.
48
49  tx-fifo-depth:
50    $ref: /schemas/types.yaml#/definitions/uint32
51    description: |
52       Transmitt FIFO depth see dt-bindings/net/ti-dp83867.h for values
53
54  rx-fifo-depth:
55    $ref: /schemas/types.yaml#/definitions/uint32
56    description: |
57       Receive FIFO depth see dt-bindings/net/ti-dp83867.h for values
58
59  ti,clk-output-sel:
60    $ref: /schemas/types.yaml#/definitions/uint32
61    description: |
62      Muxing option for CLK_OUT pin.  See dt-bindings/net/ti-dp83867.h
63      for applicable values. The CLK_OUT pin can also be disabled by this
64      property.  When omitted, the PHY's default will be left as is.
65
66  ti,rx-internal-delay:
67    $ref: /schemas/types.yaml#/definitions/uint32
68    description: |
69      RGMII Receive Clock Delay - see dt-bindings/net/ti-dp83867.h
70      for applicable values. Required only if interface type is
71      PHY_INTERFACE_MODE_RGMII_ID or PHY_INTERFACE_MODE_RGMII_RXID.
72
73  ti,tx-internal-delay:
74    $ref: /schemas/types.yaml#/definitions/uint32
75    description: |
76      RGMII Transmit Clock Delay - see dt-bindings/net/ti-dp83867.h
77      for applicable values. Required only if interface type is
78      PHY_INTERFACE_MODE_RGMII_ID or PHY_INTERFACE_MODE_RGMII_TXID.
79
80        Note: If the interface type is PHY_INTERFACE_MODE_RGMII the TX/RX clock
81          delays will be left at their default values, as set by the PHY's pin
82          strapping. The default strapping will use a delay of 2.00 ns.  Thus
83          PHY_INTERFACE_MODE_RGMII, by default, does not behave as RGMII with no
84          internal delay, but as PHY_INTERFACE_MODE_RGMII_ID.  The device tree
85          should use "rgmii-id" if internal delays are desired as this may be
86          changed in future to cause "rgmii" mode to disable delays.
87
88  ti,dp83867-rxctrl-strap-quirk:
89    type: boolean
90    description: |
91      This denotes the fact that the board has RX_DV/RX_CTRL pin strapped in
92      mode 1 or 2. To ensure PHY operation, there are specific actions that
93      software needs to take when this pin is strapped in these modes.
94      See data manual for details.
95
96  ti,sgmii-ref-clock-output-enable:
97    type: boolean
98    description: |
99      This denotes which SGMII configuration is used (4 or 6-wire modes).
100      Some MACs work with differential SGMII clock. See data manual for details.
101
102  ti,fifo-depth:
103    deprecated: true
104    $ref: /schemas/types.yaml#/definitions/uint32
105    description: |
106      Transmitt FIFO depth- see dt-bindings/net/ti-dp83867.h for applicable
107      values.
108
109required:
110  - reg
111
112unevaluatedProperties: false
113
114examples:
115  - |
116    #include <dt-bindings/net/ti-dp83867.h>
117    mdio0 {
118      #address-cells = <1>;
119      #size-cells = <0>;
120      ethphy0: ethernet-phy@0 {
121        reg = <0>;
122        tx-fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
123        rx-fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
124        ti,max-output-impedance;
125        ti,clk-output-sel = <DP83867_CLK_O_SEL_CHN_A_RCLK>;
126        ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_25_NS>;
127        ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_75_NS>;
128      };
129    };
130