Linux ethernet phy device tree. I already tried the We are running Petalinux on a custom board with a Xilinx ZynqMP, and have problems getting Ethernet to work under Linux. Dec 19, 2021 · In the Embedded Linux environment this is done via the device tree with an Ethernet node (which usually encompases the MAC) describing what type of PHY is connected. dtsi file. b) 10G/25G High Speed Ethernet Subsystem. The regs_bin utility uses the standard Linux register access API to access the switch registers. The design is based on the Sabresd dev board. d) USXGMII Ethernet Subsystem. While these devices are distinct from the network devices, and conform to a standard layout for the registers, it has been common practice to integrate the PHY management code with the network driver. It relies on Xilinx's Zynq-7000 SoC. 5G Ethernet Subsystem. mx8mp custom board. I am having a problem in understanding the correct way to code this configuration in the device tree source. The 88E is setup on gem3 with MDIO in SGMII mode. The device tree is only edited in attempt for u-boot ethernet to work. You can specify clock delay values in the PHY OF device node. devicetree is a tree data structure with nodes that describe the devices in a system. Hardware design: I started with creating my own hardware ABSTRACT Linux drivers are essential software components that allow the operating system to communicate with hardware devices such as graphics cards, printers, and Ethernet physical layer devices (PHY). The PHY concerns itself with negotiating link parameters with the link partner on the other side of the network connection (typically, an ethernet cable), and provides a register interface to allow drivers to determine what These specific ports are referred to as “dsa” ports in DSA terminology and code. And don't set I have a question regarding PHY address. The Macb Driver page on Xilinx Wiki provides detailed information about the Macb driver, its features, and configuration instructions for Xilinx hardware. 0";};};&gem3 {status = "okay";local-mac-address = [00 0a 35 00 02 90];phy-mode = "rgmii-id";phy Chapter 4 describes the DTSpec-defined device bindings – the requirements for representing certain device types or classes of devices. We are trying to describe the device-tree using the "fix I have a K26 SOM that I have instantiated on a custom board. Hi I'm trying to bring up a custom board with a XC7Z020CLG484 device but it seems I can't configure a valid device tree to be able to use an ethernet connection with a micrel ksz9031 phy connected to a "gmii-to-rgmii" ip block tied to the EMIO of the Zynq-block, see attached vivado screenshot for more details. This document aims to provide comprehensive guidance for It seems this modification to the device tree is doing something but not quite what I need. For those situations, a Device Tree binding allows to describe a "fixed link". I´ve update my device tree with this: ZyboEthernet. The network device "eth0" or SPI device "spi0. txt - kernel/common. Optional properties (for MAC): phy-mode: this is a standard Linux property for Mar 18, 2024 · Is it configured to the ethernet node of the device tree, how should I configure it? Is there a similar one I can refer to as an example? cppcoffee March 19, 2024, 1:40am 2 May 12, 2016 · Hi! I've implemented a Microblaze system on the ARTY board, which includes a Texas Instruments DP83848 PHY chip to manage ethernet communications. May 6, 2019 · Hi Team, We are using phy (88E1512) chip in ls2088a based custom board with sgmii interface. We have two Texas DP83867 PHY:s connected to GEM1 respectively GEM2 by SGMII. The ADIN 10BASE-T1L PHY driver instantiates via Linux's phylib framework, which is typically enabled on most systems. During the MDIO bus driver initialization, PHYs on this bus are probed using the _ADR object as shown below and are registered on the MDIO bus. It has 4x pairs (A,B,C and D) differential signals to support 1000Mbps. It turned out that the TX side of eth1. So you needs to have the PHY node added correctly to the DT, so it can use the MDIO bus to read the PHY register. Some Ethernet in Linux I figured things would be relatively simple for the Linux device tree since it was working in u-boot The problem is, as you can see from the picture, there is no PHY attached to the port 6, i. I am trying to configure the device tree correctly for the external PHY on GEM1. Added a device node sgmii 1 Introduction A device tree is a tree structure used to describe the physical hardware in a system. I am trying to establish a network link between a laptop and the board. XILINX AXI ETHERNET Device Tree Bindings -------------------------------------------------------- This driver supports following MAC configurations- a) AXI 1G/2. Phy interface connected to 88e1111 and 88e1111 direct connected to SOC. Linux/AM4376: Ethernet PHY modes in device tree Jupon zhu Prodigy 40 points Part Number: AM4376 Tool/software: Linux Hi, Could someone tell me the differences between the phy-modes rgmii and rgmii-txid in DTS file about the ethernet? and if there is the phy-mode rmii-txid? Jan 27, 2016 · Hi there! I have a problem with my new developed LS1021a Board. The ptp_cli utility can be used to access the 1588 PTP function of the switch. Network devices ¶ Network devices are packet oriented communication devices. Please let me know How to set Phy address in DTS file. reset-post-delay-us: description: Delay after reset deassert in microseconds. May 28, 2024 · Part Number: TDA4VM Tool/software: Hi TI, we have got the following setup: TDA4_1 SGMII Port5 -> PHY TI DP83867 TDA4_1 SGMII Port6 -> PHY TI DP83867 TDA4_1 SGMII Port7 -> PHY TI DP83867 TDA4_1 SGMII Port8 -> TDA4_2 SGMII Port7 TDA4_2 SGMII Port8 -> Unconnected I want to establish a working ethernet connection in Linux on TDA4_2 on SGMII Port7 using Mac2Mac capability. This page gives an overview of Axi Ethernet Linux driver which is available as part of the Linux distribution. pdf, and its device tree document is nexys4ddr. The custom board has two ethernet PHYs (dp83867 and max24288 Hi,We have a custom board with a Zynq-100 using two Marvell 88e1512 PHYs for dual ethernet and have not been able to get eth1 up and running on xilinx-linux (eth0 works fine). It’s possible or not ? According to linux book speaking about device tree, PHY device differs from Ethernet device. The Xilinx PS has four GEM (Gigabit Ethernet MAC) with an RGMII (Reduced Gigabit Media Independent Interface). There is a separate MDIO bus for each PHY. My Linux boots up, but I got the message "no phy found". Thanks Where should I add the piece from Xilinx-wiki?/ {xlnk {compatible = "xlnx,xlnk-1. I connected the PS GEM0 to a 1G/2. Dec 12, 2022 · Hi! I hope there is someone with a little experience in this topic. 16. Any two devices that are connected to the network can exchange information through an Ethernet connection. Modes of operation ¶ phylink has several modes of operation, which depend on the of_phy_provider_register and devm_of_phy_provider_register macros can be used to register the phy_provider and it takes device and of_xlate as arguments. phylink supports conventional phylib-based setups, fixed link setups and SFP (Small Formfactor Pluggable) modules at present. Linux kernel source tree. An operating system used the Device Tree to discover the topology of the hardware at runtime, and thereby support a majority of available hardware without hard coded information (assuming drivers were available for all devices). They are described in the phy. Xilkernel and example program 'echo server' works wonderfully, so any hardware issue is discarded. In order to differentiate between these 2 PHYs, an additional specifier should be The accepted solution lists compatible = "micrel,ksz9031" in the device tree, but I don't see a matching compatible in drivers/net/phy/micrel. Mar 8, 2021 · My question concerns the instanciation of a Ethernet PHY node on device tree if it is not associate to an Ethernet controller. But the problem is that NXP does not support it in its linux-imx kernel , you can see their post about it here. Two PHYs are connected via SGMII with the PHY-Adresses 1 and 2. There are three ethernet PHYs connected to LS1021a. I have been reading lots of posts about how to implement ethernet on the Zynq7000 PS and how to configure properly the device tree in order to use the ethernet on a linux environment, however I have several questions that I could not answer. My aim is to boot from the SD card (currently controlled by a jumper pin on the carrier card) and bring up a simple Linux on the k26c SOM as a starting point and then add my custom application. The source from U-Boot, especially the ls1021a-twr was mod The PHY specific initialization is handled by the phylib subsystem in the Linux driver (macb), and information regarding the PHY can be provided in the device tree. vivado工程配置为：GEM2启动EMIO，GEM3 配置为MIO口，PL为1G Ethernet，包括AXI 1G/2. But, what is the methology to do it ? indeed ×Sorry to interruptCSS Error May 29, 2025 · For more details on device tree files, see PetaLinux Project Structure. KSZ9031RNX can support 10/100/1000Mbps ethernet. Mar 30, 2018 · Hello, my ethernet for my Zybo doesn´t work with Linux. Some Sep 24, 2024 · In the default case (AR8035 connected to the SJA1110) there is no need to configure the AR8035 PHY in the Linux Kernel Device Tree, as this is responsibility of the SJA1110 firmware. I tried different Tool/software: Linux Hi, my company is evaluating the DP83822I as an ethernet PHY solution for an upcoming product, however we are having issues getting the PHY to function with the TI Linux drivers. I have verified that I can read the OUI bits from the PHY registers using u-boot (mdio read 0 2, mdio read 4. 5G Ethernet Subsystem These specific ports are referred to as “dsa” ports in DSA terminology and code. I am looking for any ideas for what to do differently in the device-tree. In order for ethernet to work I have to change the device tree depending on the address. Note there are two ways to describe a fixed PHY attached to an Ethernet device: - The new DT binding, where 'fixed-link' is a sub-node of the Ethernet Hi,We have a custom board with a Zynq-100 using two Marvell 88e1512 PHYs for dual ethernet and have not been able to get eth1 up and running on xilinx-linux (eth0 works fine). This hardware description is a combination of the STM32 microprocessor device tree files (. Depending on the MAC driver that is used and the operating mode (MII, RMII), a device-tree entry for the PHY may or may-not be needed. The ADIN PHY driver instantiates via Linux's phylib framework, which is typically enabled on most systems. 1 - my phy-reset pin is connected to the MIO1 2 - with linux, if i config the MIO1 for reset, the phy will stay reset all the time, i use the oscilloscope to capture the signal of the MIO1, i find that the MIO1 is actived low about 10ms, and the back to high. eth0 is working fine, but on eth1 (over EMIO) we had this problem. I planned to add a node in the device tree like below: We have a custom board with a XCZU28DR with a Marvell Alaska 88E1512. yaml#definitions/flag description: If set, indicates that the PHY is integrated into the same physical package as the Ethernet MAC. Paths, files, links and documentation on this page are given relative to the Linux kernel source tree. I have verified that I can read the OUI bits from the PHY registers using u-boot (mdio read 0 2, mdio read Hello, I'm trying to have the Zynq Gem1 ethernet interface go through the PL via the EMIO and then convert the resulting GMII interface to RGMII via the "GMII to RGMII" core. If you don't make the change permanently to your main device tree file used for the image, I can advise you of doing this: Create another dts (Ex: new-phy. Regards. - 'forced-master': The PHY is forced to operate as a master. Unfortunately, it offers no guidance or insights for solving my problem with interfacing to a Marvell switch. MDIO and RGMII are connected. We are trying to get eth0 without a PHY running. g. To summarize the problem, it appears that the mdio/phy/enet driver doesn't recognize the second PHY at address 1. 5G Ethernet Subsystem, the xilinx axi ethernet IP core provides connectivity to an external ethernet PHY supporting different interfaces: MII, GMII, RGMII, SGMII, 1000BaseX. Optional properties (for MAC): Linux kernel source tree. 1. There are two phys in your system. For each front-panel port, DSA creates specialized network devices which are used as controlling and data-flowing endpoints for use by the Linux networking stack. It consists of several hardware devices (peripherals) such as i. My MIPSfpga SOC project is shown in in design_1. However, even after we do this, we cannot see any lights on the ethernet port (we have it connected to a switch, so we should at least see an indication for "link up"). Th 2) Now i am trying just gem3 by commenting out gem1 but it still shows PHY not detected and also kernel doesn't start. Often the device tree nodes associated with a PHY provider will contain a set of children that each represent a single PHY. 2 with 2 axi_ethernetlite IP blocks. The PHY can be configured via HW pins (see datasheet). We tried to bring up the Gigabit Ethernet MAC (GEM) with this config Provides information about the standalone Ethernet driver for Xilinx, including setup, configuration, and usage details. The PHY specific initialization is handled by the phylib subsystem in the Linux driver (macb), and information regarding the PHY can be provided in the device tree. In my design, only 10BASE-T is used. 25MHz. The PHY chip is KSZ9031RNX. In this case, device tree should include the information relevant for your specific platform as information (here, Ethernet PHY information) is board-level and board-specific. dtsi &gem0 { This page gives an overview of Axi Ethernet Linux driver which is available as part of the Linux distribution. Do you have some thoughts about this situation? Maybe there's already stephenm/wcassell, I have a dual ethernet phy board with shared mdio and am having a difficult time getting my second ethernet port working. HW development decided to connect an ethernet switch (LAN9668) directly to the eth0 interface. Sep 13, 2018 · Hi there, We have an imx6sx in a custom board with 2 ethernet phys: one is a TI DP83867 and one is an NXP TJA1100 automotive phy. The third PHY is connected via RMII and comes with address 3. 3-c45" for PHYs that implement IEEE802. As I understand from reading the documentation, this core has a register on address 0x10, that can be Sep 26, 2024 · Where do I find example device tree files as well as drivers for the various KSZ switches? Jun 22, 2022 · We got a Kria SOM board from DigiKey and are trying to do a board bring up with a custom carrier board (build based on Xilinx recommendation). The reason is it uses an external Ethernet PHY IC that needs to be specified in the device tree. I selected "MDIO management interface for external phy" in the core functionality. zynq-7000 'switch0' 'switch1' (cpu) mv88e6390x mv88e6390x ------- --------- --------- | | Oct 2, 2022 · Customize the device tree for Ethernet The Petalinux project could be built straight away and it would work but wouldn't have Ethernet. When booted into Linux, the system can ping without any issue. Apr 5, 2021 · Our application only requires one ethernet connection, so one PHY was omitted. Depending on the MAC driver that is used and the operating mode (MII, RGMII, RMII), a device-tree entry for the PHY may or may-not be needed. I have configured the switch in DTS as follows &fec { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_fec>; phy-mode = "rgmii-id"; fsl,magic-packet; status = "okay"; #phy-reset-duration = <20>; #phy-rese We have the Ethernet working in u-boot, but I cannot seem to figure out the magical Linux device tree configuration to get it running in Linux. Deprecated, but still supported, these properties can also be added to an Ethernet OF device node. Child nodes of the Ethernet controller are typically the individual PHY devices connected via the MDIO bus (sometimes the MDIO bus controller is separate). - xlnx,txcsum : 0 or empty for disabling TX checksum offload, 1 to enable partial TX checksum offload, 2 to enable full TX checksum offload - xlnx,rxcsum : Same values as xlnx,txcsum but for RX checksum offload Aug 6, 2025 · Linux Kernel Documentation1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Purpose ¶ Most network devices consist of set of registers which provide an interface to a MAC layer, which communicates with the physical connection through a PHY. Aug 6, 2025 · PHY types, including 1000Base-T, where it controls whether the PHY should be a master (clock source) or a slave (clock receiver). The TJA1101 is always seen on the bus but the DP isn't. dts extension). Currently the default configuration for the PHY is shown in the image below. My understanding is that the existing coding is not correct because, when u-boot loads, I am getting the following message: <code>ZYNQ GEM Micrel KSZ9021/KSZ9031/KSZ9131 Gigabit Ethernet PHY Some boards require special tuning values, particularly when it comes to clock delays. I am configuring a custom Nov 19, 2020 · In order to add or load a device tree blob in runtime, the only way is to use Linux overlay. In my kernel configuration, I added CONFIG_NET_DSA and CONFIG_NET_DSA_MV88E6352. 0" needs to be supplied to specify which device to use with the register access API. Chapter 5 describes the in-memory encoding of the devicetree. This is mandatory for network interfaces that have PHYs connected to MAC via MDIO bus. It applies to all MDIO devices and it's determined by how fast all devices are ready for communication. So, even though Linux seems to attach the generic PHY driver, it still appears that the PHY is not working. c . Then it connects to a PHY device using RGMII. - 'forced-slave': The PHY is forced to operate as a slave. Aug 6, 2025 · # # By default in Linux, when using phylib/phylink, the MAC is expected # to read the 'phy-mode' from Device Tree, not implement any delays, # and pass the value to the PHY. The iMX8M AM4376: Linux Device Tree with Marvell Switch and its Linux DSA Driver R Fritz Prodigy 130 points Other Parts Discussed in Thread: AM4372 Hello, i have a sitara 4376 and have problems with the devicetree am4372. e) MRMAC Ethernet Subsystem. The PHY concerns itself with negotiating link parameters with the link partner on the other side of the network connection (typically, an ethernet cable), and provides a register interface to allow drivers to determine what ABSTRACT Linux drivers are essential software components that allow the operating system to communicate with hardware devices such as graphics cards, printers, and Ethernet physical layer devices (PHY). dts) that includes the main dts and Jun 21, 2024 · For more details on device tree files, see PetaLinux Project Structure. Jul 12, 2017 · So I have been trying to run the mv88e6352 switch work with my custom imx6q board with 4. Additional I follow these instructions to create my Design with all necessary files. XILINX AXI ETHERNET Device Tree Bindings -------------------------------------------------------- Also called AXI 1G/2. The official Linux kernel from Xilinx. 4 to generate u-boot and image. The PHY will then implement delays as # specified by the 'phy-mode'. In addition, the I2C buses connected to the SFP cages, which are used at runtime to Aug 31, 2016 · Hello My 6638 custom board has 4 Ethernet Interface. Do you think I am seeing the same issue you are describing about u-boot and linux? If so, how would I remedy the situation in my case? I am new to The official Linux kernel from Xilinx. txt file in this same directory. Documentation/devicetree/bindings/net/fixed-link. ethernet_phy: ethernet-phy@???{ Mar 14, 2019 · 1 I recently study Linux phy driver, and i have some questions that need help. So, it could be possible declare PHY device on device tree without using Ethernet parent relationship. but I can't find any recommend Document. When I am trying to use the MDIO interface, on Linux dmesg I am getting the following error: macb ff0c0000. PHY nodes Required properties: - interrupts : interrupt specifier for the sole interrupt. If neither of these are specified, the AMD Customer CommunityLoading × Sorry to interrupt CSS Error Refresh ABSTRACT Linux drivers are essential software components that allow the operating system to communicate with hardware devices such as graphics cards, printers, and Ethernet physical layer devices (PHY). ub. SGMII phy mode is tick off as I understand the core needs to be on the MAC mode. That said, you have to specify the name of the phy device as trigger This page gives an overview of Axi Ethernet Linux driver which is available as part of the Linux distribution. Note that some USB controllers have PHY functionality embedded into it and others use an Purpose ¶ Most network devices consist of set of registers which provide an interface to a MAC layer, which communicates with the physical connection through a PHY. - 'preferred-master': Prefer the PHY to be master but allow negotiation. 5G Ethernet PCS/PMA or SGMII core to which I connected to my external PHY, Marvell 88e2110. Each node in the tree describes the characteristics of the device being represented. dtsi. , the USB controller has a PHY to provide functions such as serialization, de-serialization, encoding, decoding and is responsible for obtaining the required data transmission rate. I have tried to use the latest AXI Ethernet driver of the official Linux kernel from Xilinx (Name: linux-xlnx, Kernel Version: 4. dts, and the Ethernet part with SGMII mode is similar to the official VC707 BIST Design, as shown in the figure below. 5G Ethernet subsysterm,AXI DMA,AXI Intercennect ip cores等，配置为RGMII接口，分别接连PHY，具体配置如下所示：请问petalinux 怎么配置，device-tree怎么修改？ The regs_bin utility uses the standard Linux register access API to access the switch registers. phy blocks as soon as we do auto-negotiation and speed-sensing - no clue why! Phy. Mark the corresponding energy efficient ethernet mode as broken and request the ethernet to stop advertising it. Unfortunately, a small mistake was made in the design; the PHY address strapping from ENET 1 was used for ENET2. So, my board only connected the differential Hello, rencently, i have met the same issue, the detail like the following. Does bad device tree stop kernel from loading ? Also I've tried reg = <0x0c>; as i read the PHY is bootstrapped to that PHY address from here , which did not solve the issue. The purpose of the device tree is to describe device information in a system that cannot necessarily be dynamically detected or discovered by a client program. Feb 21, 2024 · We are connected ethernet switch to SoC using MDIO and MDC lines. To comply with DSA needs, I complemented my device tree with the entry below: dsa@0{ compatible = Feb 20, 2025 · Once linux-menuconfig opens, navigate to Device Drivers -> Network device support -> Distributed Switch Architecture drivers -> Microchip KSZ8795/KSZ9477/LAN937x series switch support, to find the DSA driver options. Optional properties (for MAC): Linux will recognize the Micrel PHY through its phy-id via the MDIO. Contents: Device Tree binding for the fixed PHY driver (the exact DT binding would have to be discussed), but I'm wondering whether describing a fixed PHY in the DT is actually correct, because describing a fixed PHy is not really describing the hardware, the hardware is actually a switch. Mar 24, 2021 · Is there a way to define ethernet port's auto-negotiation property through linux's device-tree? # above. Page generated on 2025-08-06 08:57 EST. I am trying to work with two ethernet ports Aug 19, 2020 · According to the code macb driver registers PHY and that, if device node is defined, will register the LED trigger. We need to add mdio entries in the device tree source for this switch. Take a Computer-on-Module (COM) such as the iMX8M Mini uCOM board as an example. The “phy-mode” property does this task. For each MAC node, a device property “phy-handle” is used to reference the PHY that is registered on an MDIO bus. Without the drivers, Linux is unable to use the hardware effectively, resulting in devices not being recognized or functioning properly. I am using GEM1 / GTLane1 to connect to the Ethernet port through a GPY111 PHY chip. I have 2 Ethernetports (eth0,eth1), where eth0 is directly connected to a marvell-switch and eth1 to a phy. Oct 11, 2020 · This is my system's network topology. Aug 29, 2024 · Hii, I am configuring ethernet switch ksz9563 from microchip in my i. I'm using Peta-linux 2017. A collection of multiple switches connected to each other is called a “switch tree”. c) 10 Gigabit Ethernet Subsystem. Oct 6, 2020 · The disadvantages would be that you would have to use __of_reset_control_get () against the PHY device tree node because there are no phy_device being created yet because you have not been able to identify it. Shin. @malburgjbur0 Linux can manage only one phy through MDIO with phy-handle setting in device tree. It is used to connect a device to the physical medium e. 3 clause 22 or IEEE802. txt. Devices in this class are assumed to implement the data link layer (layer 2) of the seven-layer OSI model and use Media Access Control (MAC) addresses. See the Device tree for an explanation of the device tree file split. How do I configure the linux build to use gem for ethernet0? this is the boot log The ADIN PHY driver instantiates via Linux's phylib framework, which is typically enabled on most systems. e. This provides a hardware description of the Ethernet switch peripheral used by the STM32/TTTech driver. I know that I have to specify a ethernet-phy device in the device-tree, but I don't understand what register number I have to use. For each front-panel port, DSA will create specialized network devices which are used as controlling and data-flowing endpoints for use by the Linux networking stack. 0e90", "ethernet-phy-ieee802. For more details, refer to PG047. In this case, it is controlled by the Ethernet switch driver. 3-c22" or "ethernet-phy-ieee802. I have a problem configuring the mdio bus to recongnize both phys. To add information like the Ethernet PHY, include the information in the system-conf. 88e1111s have own Phy Address (Not MAC Address) each other. - reg : The ID number for the phy, usually a small integer Optional Properties: - compatible: Compatible list, may contain "ethernet-phy-ieee802. 3-c45"; interrupt-parent = <&PIC>; interrupts = <35 1>; reg = <0>; resets = <&rst 8>; reset-names = "phy"; reset-gpios = <&gpio1 4 1>; reset-assert-us = <1000>; reset-deassert-us = <2000>; leds { #address-cells = <1>; #size-cells = <0>; led@0 { reg = <0>; color We have the Ethernet working in u-boot, but I cannot seem to figure out the magical Linux device tree configuration to get it running in Linux. Why is it holding the phy in reset? Can you help me understand the format of the device tree entries? What is the significance of the zero in "phy@0" and the 1 in "phy@1"? Apr 20, 2016 · Looking at the Micrel driver in Linux I found that it doesn't use the device tree (in this version of Linux), so this part of the device tree is useless: ethphy1: ethernet-phy@0 { Depending on your device tree include structure you should add this at board specification level. 9). As I understand it, L2 ethernet frames that are sent to (or received from) the switch incur extra DSA tagging We would like to show you a description here but the site won’t allow us. 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). txt - xlnx,phy-type : Deprecated, do not use, but still accepted in preference to phy-mode. ethernet-phy@0 { compatible = "ethernet-phy-id0141. The problem lies in the programming of the auto-negotiated speed. In the two phys system, we can assign external phy node to phy-handle, and let linux manage external phy device. Can anyone guide me to the sample kernel source for this. but the An operating system used the Device Tree to discover the topology of the hardware at runtime, and thereby support a majority of available hardware without hard coded information (assuming drivers were available for all devices). If needed, muxers should be configured to ensure the Hello, I'm using Zynq Ultrascale\+ to interface with an ethernet PHY chip from Micrel (Microchip now). I use this linaro as my rootfs. This document aims to provide comprehensive guidance for Linux Kernel DocumentationBased on kernel version 6. Device tree Introduction The device tree is a data structure used for describing hardware. I'm using KSZ9031RNX PHY with Zynq Ultrascale\+. MX 8M Mini application processor, LPDDR4 memory, eMMC flash, Ethernet PHY, and Power Management IC (PMIC), see the figure below for a block diagram. 11, and Token-Ring. Some Ethernet MACs have a "fixed link", and are not connected to a normal MDIO-managed PHY device. git - Git at Google Introduction PHY is an abbreviation for the physical layer Responsible for transmitting data over a physical medium PHY connects the device controller with the physical medium USB SATA PCIE ETHERNET Mar 4, 2005 · Part Number: DP83867IR Hi, We just installed DP83867IRRGZ on our custom board with Zynq FPGA. 5G Ethernet Subsystem- also called AXI 1G/2. 15 linux kernel. Contribute to torvalds/linux development by creating an account on GitHub. of_phy_provider_register and devm_of_phy_provider_register macros can be used to register the phy_provider and it takes device and of_xlate as arguments. I suspect we have an issue with our device tree configuration, and was hoping to find a reference device tree config for the TI driver. The Linux varient is not using a device tree entry. 3) Yes the hardware is DP83867IRRGZ. Hi All, I have two Ethernet PHYs controlled by a single MDIO bus. It seems the driver expects the external PHY to be directly addressable on the MDIO bus and with the Marvell switch there appears to be another level of indirection that is Introduction ¶ PHY is the abbreviation for physical layer. I am new to the Linux DSA architecture and the Marvell switch in general. In u-boot, ping does not work. An Ethernet protocol is used to transmit packets of data containing any sort of information. # # By default in Linux, when using phylib/phylink, the MAC is expected # to read the 'phy-mode' from Device Tree, not implement any delays, # and pass the value to the PHY. Contribute to Xilinx/linux-xlnx development by creating an account on GitHub. Note that these settings are applied after any phy-specific fixup from phy_fixup_list (see phy I have discovered more information related to the MTU errors that are reported when configuring switch slave ports (lan [0-4]) and the master port (eth0) connected to the CPU port (#5) of the Marvell switch. The problem is when I boot linux, I either get address 0x8 or 0x9 in both u-boot and linux. My system is a bit different, it is a Microblaze running PetaLinux 2021. Ethernet provides a fast, efficient, and direct connection to a phylink ¶ Overview ¶ phylink is a mechanism to support hot-pluggable networking modules directly connected to a MAC without needing to re-initialise the adapter on hot-plug events. Hi, I'm working on a custom board with a zynq ultrascale. phy-is-integrated: $ref: /schemas/types. For the dt boot case, all PHY providers should use one of the above 2 macros to register the PHY provider. The addresses of the PHYs is 0 and 1. 3. Reference clock is 156. However, on linux (using both mainstream and xilinx Hello,In a design that is running on Linux OS with a Zynq-7020 I need to drive the RESET_N signal of an external Ethernet PHY through GPIO pin T9. I want to set a88e1111 phy address int Linux DTS file. dtsi extension) and board device tree files (. We have the Ethernet working in u-boot, but I cannot seem to figure out the magical Linux device tree configuration to get it running in Linux. Aug 6, 2025 · That node describes an IP block (PHY provider) that implements 2 different PHYs. TX works again if we just read the register 0 of KSZ9031. Otherwise there might be a chance that status = "disabled"; is overwritten by a status = "okay"; somewhere. ethernet eth0: Could not attach PHY (-22) My device tree entry for this . Ethernet is a way of connecting devices together in a local area network or LAN. The PHY should always be reconfigured # to implement the needed delays, replacing any setting Hi @nanz - I've spent a good deal of time looking at the device tree documentation for the GMMITORGMII driver. Download This article explains how to configure the Ethernet switch when it is assigned to the Linux®OS. Part Number: AM3359 Tool/software: Linux Hello all, I'm working on custom board based on am3359 ice v2. 3 clause 45 specifications. I have attached text file with the contents of the board's startup. Linux kernel source tree. For non-MDIO PHY management see fixed-link. Examples of network devices include Ethernet, FDDI, 802. The PHY can be configured via HW pins (see datasheet), or via SW. AXI 1G/2. I am using TI DP83867 PHY and the PHY address in configured on the board using bootstrap pins and is set to 0x8. The configuration is performed using the device tree mechanism. It also includes two segments of memory for buffering TX and RX, as well as the capability of Ethernet Device Drivers ¶ Device drivers for Ethernet and Ethernet-based virtual function devices. Hi All, I have a SOM board with 1 DP83867IR/CR Ethernet PHY on the board and 1 DP83869HM Ethernet PHY external to the board and using the GEMS with GMII to RGMII converter on the FPGA. For example, a PCI host may be able to probe and I have the same phy chip as the zcu102 on gem3 . For example: my ethernet phy is Marvell Alaska 88E1548 How do I know if the kernel has support for this phy? Apr 19, 2016 · On our custom board we have Micrel KSZ9031 PHY devices attached to both PS Ethernet interfaces. Part Number: 66AK2L06 Tool/software: Linux Hello, please tell someone simply how to configure the DP83867 PHY chip in the device tree. This document aims to provide comprehensive guidance for Jun 4, 2012 · - phy-mode : See ethernet. This is the same question that softwind555 had. the connection between the Zynq and the switch is PHY-less, but I had to specify <phy0> in the device tree to make the dsa driver to see the switch. We recently worked on Linux support for a custom hardware platform based on the Texas Instruments AM335x system-on-chip, with a somewhat special networking setup: each of the two ports of the AM335x Ethernet MAC was connected to a Microchip VSC8572 Ethernet PHY, which itself allowed to access an SFP cage. We can manually remove pcs-pma phy isolation with configuration_vector and configuration_valid port. copqd irnrt wlsoxt kovqi qqh ildmd bevgw smjtfujk oogn ncu

Linux ethernet phy device tree. The design is based on the Sabresd dev board.