From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- Documentation/devicetree/bindings/net/mdio.yaml | 116 ++++++++++++++++++++++++ 1 file changed, 116 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/mdio.yaml (limited to 'Documentation/devicetree/bindings/net/mdio.yaml') diff --git a/Documentation/devicetree/bindings/net/mdio.yaml b/Documentation/devicetree/bindings/net/mdio.yaml new file mode 100644 index 000000000..b5706d4e7 --- /dev/null +++ b/Documentation/devicetree/bindings/net/mdio.yaml @@ -0,0 +1,116 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/net/mdio.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MDIO Bus Generic Binding + +maintainers: + - Andrew Lunn + - Florian Fainelli + - Heiner Kallweit + +description: + These are generic properties that can apply to any MDIO bus. Any + MDIO bus must have a list of child nodes, one per device on the + bus. These should follow the generic ethernet-phy.yaml document, or + a device specific binding document. + +properties: + $nodename: + pattern: "^mdio(@.*)?" + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + reset-gpios: + maxItems: 1 + description: + The phandle and specifier for the GPIO that controls the RESET + lines of all devices on that MDIO bus. + + reset-delay-us: + description: + RESET pulse width in microseconds. It applies to all MDIO devices + and must therefore be appropriately determined based on all devices + requirements (maximum value of all per-device RESET pulse widths). + + reset-post-delay-us: + description: + Delay after reset deassert in microseconds. It applies to all MDIO + devices and it's determined by how fast all devices are ready for + communication. This delay happens just before e.g. Ethernet PHY + type ID auto detection. + + clock-frequency: + description: + Desired MDIO bus clock frequency in Hz. Values greater than IEEE 802.3 + defined 2.5MHz should only be used when all devices on the bus support + the given clock speed. + + suppress-preamble: + description: + The 32 bit preamble should be suppressed. In order for this to + work, all devices on the bus must support suppressed preamble. + type: boolean + +patternProperties: + '@[0-9a-f]+$': + type: object + + properties: + reg: + minimum: 0 + maximum: 31 + description: + The ID number for the device. + + broken-turn-around: + $ref: /schemas/types.yaml#/definitions/flag + description: + If set, indicates the MDIO device does not correctly release + the turn around line low at end of the control phase of the + MDIO transaction. + + reset-gpios: + maxItems: 1 + description: + The GPIO phandle and specifier for the MDIO reset signal. + + reset-assert-us: + description: + Delay after the reset was asserted in microseconds. If this + property is missing the delay will be skipped. + + reset-deassert-us: + description: + Delay after the reset was deasserted in microseconds. If + this property is missing the delay will be skipped. + + required: + - reg + +additionalProperties: true + +examples: + - | + davinci_mdio: mdio@5c030000 { + reg = <0x5c030000 0x1000>; + #address-cells = <1>; + #size-cells = <0>; + + reset-gpios = <&gpio2 5 1>; + reset-delay-us = <2>; + + ethphy0: ethernet-phy@1 { + reg = <1>; + }; + + ethphy1: ethernet-phy@3 { + reg = <3>; + }; + }; -- cgit v1.2.3