1# SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause) 2# Copyright (C) 2020 Texas Instruments Incorporated 3%YAML 1.2 4--- 5$id: "http://devicetree.org/schemas/net/ti,dp83822.yaml#" 6$schema: "http://devicetree.org/meta-schemas/core.yaml#" 7 8title: TI DP83822 ethernet PHY 9 10maintainers: 11 - Andrew Davis <afd@ti.com> 12 13description: | 14 The DP83822 is a low-power, single-port, 10/100 Mbps Ethernet PHY. It 15 provides all of the physical layer functions needed to transmit and receive 16 data over standard, twisted-pair cables or to connect to an external, 17 fiber-optic transceiver. Additionally, the DP83822 provides flexibility to 18 connect to a MAC through a standard MII, RMII, or RGMII interface 19 20 Specifications about the Ethernet PHY can be found at: 21 http://www.ti.com/lit/ds/symlink/dp83822i.pdf 22 23allOf: 24 - $ref: "ethernet-phy.yaml#" 25 26properties: 27 reg: 28 maxItems: 1 29 30 ti,link-loss-low: 31 type: boolean 32 description: | 33 DP83822 PHY in Fiber mode only. 34 Sets the DP83822 to detect a link drop condition when the signal goes 35 high. If not set then link drop will occur when the signal goes low. 36 This property is only applicable if the fiber mode support is strapped 37 to on. 38 39 ti,fiber-mode: 40 type: boolean 41 description: | 42 DP83822 PHY only. 43 If present the DP83822 PHY is configured to operate in fiber mode 44 Fiber mode support can also be strapped. If the strap pin is not set 45 correctly or not set at all then this boolean can be used to enable it. 46 If the fiber mode is not strapped then signal detection for the PHY 47 is disabled. 48 In fiber mode, auto-negotiation is disabled and the PHY can only work in 49 100base-fx (full and half duplex) modes. 50 51 rx-internal-delay-ps: 52 description: | 53 DP83822 PHY only. 54 Setting this property to a non-zero number sets the RX internal delay 55 for the PHY. The internal delay for the PHY is fixed to 3.5ns relative 56 to receive data. 57 58 tx-internal-delay-ps: 59 description: | 60 DP83822 PHY only. 61 Setting this property to a non-zero number sets the TX internal delay 62 for the PHY. The internal delay for the PHY is fixed to 3.5ns relative 63 to transmit data. 64 65required: 66 - reg 67 68unevaluatedProperties: false 69 70examples: 71 - | 72 mdio0 { 73 #address-cells = <1>; 74 #size-cells = <0>; 75 ethphy0: ethernet-phy@0 { 76 reg = <0>; 77 rx-internal-delay-ps = <1>; 78 tx-internal-delay-ps = <1>; 79 }; 80 }; 81 82... 83