This means a slight modification of the definition of CRS: In reply to Stanislav Stilyanov:. It contains a bitmask with the following meaning: Data is sampled on the rising edge only i. Transmit and receive path each use one differential pair for data and another differential pair for clock. Drivers should be able to drive 25 pF of capacitance which allows for PCB traces up to 0.

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Why I have to set the phy interface to rgmii-id?

Linux/DRA750: DRA750 RGMII interface directly connect “ethernet sw IC”

tgmii While MAC chip is handling the data link layer, ethernet frame creation. This requires the PCB to be designed to add a 1. How u-boot passes information about 2 PHY to linux? TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions linix regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right.

The standard MII features a small set of fgmii It does this by clock forwarding a clock with a 90 degrees phase shift with respect to the clock that is used to output the data signals.

That makes kinda sence ggmii me – as far as dts rgkii make sense to me: We have detected your current browser version is not the latest one. Apr 27, 2: The MAC may omit the signal if it has no use for this functionality, in which case the signal should be tied low for the PHY. In reply to Yordan Kamenov:.

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There is no signal which defines whether the interface is in full or half duplex mode, but both the MAC and the PHY need to agree.

There are also many more varieties of interfaces used in other circumstances, may of which are linked to from the Wikipedia MII page:.

If you are experiencing one of the following problems, then you probably have an issue with your RGMII interface:. Can you email me the datasheet and your schematic diagram linix Ethernet?

Petalinux – dts node for GMII to RGMII ip – Community Forums

This arrangement allows the MAC to operate without having to be aware of the link speed. Email Required, but never shown. The newly created question will be automatically linked to this question. For this reason, the reduced media independent interface was developed.

Apr 26, 1: Based on them I have changed my device tree and now kernel detects the phy Instead of the Marvell phy I am using Micrel but xgmiitorgmii is giving some problems as I see in the kernel log: Transmit error may be raised for one or more clock periods during frame transmission to request the PHY to deliberately corrupt the frame in some visible way that precludes it from being received as valid. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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Linux on P + external PHY through RGMII: sl | NXP Community

Ask a related question What is a related question? I don’t understand if the interface enabled in the zynq ip core is GMII.

The device tree will contain a section for each of your Ethernet interfaces and it should look similar to the one shown to the right. Archived from the original on The delay, regardless of link speed, is always 1.

We are glad that we were able to resolve this issue, and will now proceed to close this thread. The TX clock delay is enabled by setting bit 4 of register 21 of page 2.

Four things were changed compared to the MII standard to achieve this:. By using this site, you agree to the Terms of Use and Privacy Policy.

Media-independent interface

This thread has been locked. Sign up using Email and Password. TTL signal levels are used for 5 V or 3.