Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | |
| 8 | title: TI DP83822 ethernet PHY |
| 9 | |
| 10 | maintainers: |
| 11 | - Andrew Davis <afd@ti.com> |
| 12 | |
| 13 | description: | |
| 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 | |
| 23 | allOf: |
| 24 | - $ref: ethernet-phy.yaml# |
| 25 | |
| 26 | properties: |
| 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 | |
| 65 | required: |
| 66 | - reg |
| 67 | |
| 68 | unevaluatedProperties: false |
| 69 | |
| 70 | examples: |
| 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 | ... |