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# SPDX-License-Identifier: (GPL-
2.
0+ OR BSD-
2-Clause)
# Copyright (C)
2019 Texas Instruments Incorporated
%YAML
1.
2
---
$id:
http://devicetree.org/schemas/net/ti,dp83867.yaml#
$schema:
http://devicetree.org/meta-schemas/core.yaml#
title: TI DP83867 ethernet PHY
allOf:
- $ref: ethernet-controller.yaml#
maintainers:
- Andrew Davis <afd@ti.com>
description: |
The DP83867 device is a robust, low power, fully featured Physical Layer
transceiver with integrated PMD sublayers to support
10BASE-Te,
100BASE-TX
and
1000BASE-T Ethernet protocols.
The DP83867 is designed for easy implementation of
10/
100/
1000 Mbps Ethernet
LANs. It interfaces directly to twisted pair media via an external
transformer. This device interfaces directly to the MAC layer through the
IEEE
802.
3 Standard Media Independent Interface (MII), the IEEE
802.
3 Gigabit
Media Independent Interface (GMII) or Reduced GMII (RGMII).
Specifications about the Ethernet PHY can be found at:
https://www.ti.com/lit/gpn/dp83867ir
properties:
reg:
maxItems:
1
nvmem-cells:
maxItems:
1
description:
Nvmem data cell containing the value to write to the
IO_IMPEDANCE_CTRL field of the IO_MUX_CFG register.
nvmem-cell-names:
items:
- const: io_impedance_ctrl
ti,min-output-impedance:
type: boolean
description: |
MAC Interface Impedance control to set the programmable output impedance
to a minimum value (
35 ohms).
ti,max-output-impedance:
type: boolean
description: |
MAC Interface Impedance control to set the programmable output impedance
to a maximum value (
70 ohms).
Note: Specifying an io_impedance_ctrl nvmem cell or one of the
ti,min-output-impedance, ti,max-output-impedance properties
are mutually exclusive. If more than one is present, an nvmem
cell takes precedence over ti,max-output-impedance, which in
turn takes precedence over ti,min-output-impedance.
tx-fifo-depth:
$ref: /schemas/types.yaml#/definitions/uint32
description: |
Transmitt FIFO depth see dt-bindings/net/ti-dp83867.h for values
rx-fifo-depth:
$ref: /schemas/types.yaml#/definitions/uint32
description: |
Receive FIFO depth see dt-bindings/net/ti-dp83867.h for values
ti,clk-output-sel:
$ref: /schemas/types.yaml#/definitions/uint32
description: |
Muxing option for CLK_OUT pin. See dt-bindings/net/ti-dp83867.h
for applicable values. The CLK_OUT pin can also be disabled by this
property. When omitted, the PHY's default will be left as is.
ti,rx-internal-delay:
$ref: /schemas/types.yaml#/definitions/uint32
description: |
RGMII Receive Clock Delay - see dt-bindings/net/ti-dp83867.h
for applicable values. Required only if interface type is
PHY_INTERFACE_MODE_RGMII_ID or PHY_INTERFACE_MODE_RGMII_RXID.
ti,tx-internal-delay:
$ref: /schemas/types.yaml#/definitions/uint32
description: |
RGMII Transmit Clock Delay - see dt-bindings/net/ti-dp83867.h
for applicable values. Required only if interface type is
PHY_INTERFACE_MODE_RGMII_ID or PHY_INTERFACE_MODE_RGMII_TXID.
Note: If the interface type is PHY_INTERFACE_MODE_RGMII the TX/RX clock
delays will be left at their default values, as set by the PHY's pin
strapping. The default strapping will use a delay of
2.
00 ns. Thus
PHY_INTERFACE_MODE_RGMII, by default, does not behave as RGMII with no
internal delay, but as PHY_INTERFACE_MODE_RGMII_ID. The device tree
should use "rgmii-id" if internal delays are desired as this may be
changed in future to cause "rgmii" mode to disable delays.
ti,dp83867-rxctrl-strap-quirk:
type: boolean
description: |
This denotes the fact that the board has RX_DV/RX_CTRL pin strapped in
mode
1 or
2. To ensure PHY operation, there are specific actions that
software needs to take when this pin is strapped in these modes.
See data manual for details.
ti,sgmii-ref-clock-output-enable:
type: boolean
description: |
This denotes which SGMII configuration is used (
4 or
6-wire modes).
Some MACs work with differential SGMII clock. See data manual for details.
ti,fifo-depth:
deprecated: true
$ref: /schemas/types.yaml#/definitions/uint32
description: |
Transmitt FIFO depth- see dt-bindings/net/ti-dp83867.h for applicable
values.
required:
- reg
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/net/ti-dp83867.h>
mdio0 {
#address-cells = <
1>;
#size-cells = <
0>;
ethphy0: ethernet-phy@
0 {
reg = <
0>;
tx-fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
rx-fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
ti,max-output-impedance;
ti,clk-output-sel = <DP83867_CLK_O_SEL_CHN_A_RCLK>;
ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_25_NS>;
ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_75_NS>;
};
};