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