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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/net/mscc-phy-vsc8531.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Microsemi VSC8531 Gigabit Ethernet PHY
maintainers:
- Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
description:
The VSC8531 is a Gigabit Ethernet PHY with configurable MAC interface
drive strength and LED modes.
allOf:
- $ref: ethernet-phy.yaml#
select:
properties:
compatible:
contains:
enum:
- ethernet-phy-id0007.0570 # VSC8531
- ethernet-phy-id0007.0772 # VSC8541
required:
- compatible
properties:
compatible:
items:
- enum:
- ethernet-phy-id0007.0570 # VSC8531
- ethernet-phy-id0007.0772 # VSC8541
- const: ethernet-phy-ieee802.3-c22
vsc8531,vddmac:
$ref: /schemas/types.yaml#/definitions/uint32
description:
The VDDMAC voltage in millivolts. This property is used in combination
with the edge-slowdown property to control the drive strength of the
MAC interface output signals.
enum: [3300, 2500, 1800, 1500]
default: 3300
vsc8531,edge-slowdown:
$ref: /schemas/types.yaml#/definitions/uint32
description: >
Percentage by which the edge rate should be slowed down relative to
the fastest possible edge time. This setting helps reduce electromagnetic
interference (EMI) by adjusting the drive strength of the MAC interface
output signals. Valid values depend on the vddmac voltage setting
according to the edge rate change table in the datasheet.
- When vsc8531,vddmac = 3300 mV: allowed values are 0, 2, 4, 7, 10, 17, 29, and 53.
(Recommended: 7)
- When vsc8531,vddmac = 2500 mV: allowed values are 0, 3, 6, 10, 14, 23, 37, and 63.
(Recommended: 10)
- When vsc8531,vddmac = 1800 mV: allowed values are 0, 5, 9, 16, 23, 35, 52, and 76.
(Recommended: 0)
- When vsc8531,vddmac = 1500 mV: allowed values are 0, 6, 14, 21, 29, 42, 58, and 77.
(Recommended: 0)
enum: [0, 2, 3, 4, 5, 6, 7, 9, 10, 14, 16, 17, 21, 23, 29, 35, 37, 42, 52, 53, 58, 63, 76, 77]
default: 0
vsc8531,led-0-mode:
$ref: /schemas/types.yaml#/definitions/uint32
description: LED[0] behavior mode. See include/dt-bindings/net/mscc-phy-vsc8531.h
for available modes.
minimum: 0
maximum: 15
default: 1
vsc8531,led-1-mode:
$ref: /schemas/types.yaml#/definitions/uint32
description: LED[1] behavior mode. See include/dt-bindings/net/mscc-phy-vsc8531.h
for available modes.
minimum: 0
maximum: 15
default: 2
vsc8531,led-2-mode:
$ref: /schemas/types.yaml#/definitions/uint32
description: LED[2] behavior mode. See include/dt-bindings/net/mscc-phy-vsc8531.h
for available modes.
minimum: 0
maximum: 15
default: 0
vsc8531,led-3-mode:
$ref: /schemas/types.yaml#/definitions/uint32
description: LED[3] behavior mode. See include/dt-bindings/net/mscc-phy-vsc8531.h
for available modes.
minimum: 0
maximum: 15
default: 8
load-save-gpios:
description: GPIO phandle used for the load/save operation of the PTP hardware
clock (PHC).
maxItems: 1
dependencies:
vsc8531,edge-slowdown:
- vsc8531,vddmac
required:
- compatible
- reg
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/net/mscc-phy-vsc8531.h>
mdio {
#address-cells = <1>;
#size-cells = <0>;
ethernet-phy@0 {
compatible = "ethernet-phy-id0007.0772", "ethernet-phy-ieee802.3-c22";
reg = <0>;
vsc8531,vddmac = <3300>;
vsc8531,edge-slowdown = <7>;
vsc8531,led-0-mode = <VSC8531_LINK_1000_ACTIVITY>;
vsc8531,led-1-mode = <VSC8531_LINK_100_ACTIVITY>;
load-save-gpios = <&gpio 10 GPIO_ACTIVE_HIGH>;
};
};
|
