Hi,
I am using the orin AGX dev kit and want to develop MDIO commands to the read the 10G ethernet PHY registers.
I have ported mdio and ran a few commands. The response from the read commands are always 0, which seems erroneous.
Is there another/better application that I should use ? Is there a document that describes how to read the PHY registers via MDIO?
Thanks,
Malcolm
*** Please note that this reply is generated by LLM automatically ***
To develop MDIO commands to read the 10G Ethernet PHY registers on the Jetson AGX Orin dev kit, you can use the mdio tool or the ethtool command.
Using mdio tool:
The mdio tool is a simple command-line utility that allows you to read and write MDIO registers. You can use it to read the PHY registers by specifying the MDIO address and the register address.
For example, to read the PHY register at address 0x10, you can use the following command:
mdio -d 0x10 -r 0x10
This will read the value of the register at address 0x10 and print it to the console.
Using ethtool command:
The ethtool command is a more powerful tool that allows you to query and configure Ethernet devices. You can use it to read the PHY registers by specifying the Ethernet device and the MDIO address.
For example, to read the PHY register at address 0x10 on the Ethernet device eth0, you can use the following command:
ethtool -m eth0 0x10
This will read the value of the register at address 0x10 and print it to the console.
Comparison:
Both mdio and ethtool can be used to read the PHY registers, but ethtool is a more powerful tool that provides more features and options. ethtool also provides a more user-friendly interface and allows you to query and configure Ethernet devices in more detail.
Documentation:
The documentation for the mdio tool is limited, but you can find more information about it by running the command mdio --help.
The documentation for the ethtool command is more extensive and can be found by running the command ethtool --help. You can also find more information about ethtool in the Linux kernel documentation.
PHY register documentation:
The documentation for the PHY registers is typically provided by the PHY chip manufacturer. You can find the documentation for the 10G Ethernet PHY chip used on the Jetson AGX Orin dev kit by searching online or contacting the manufacturer.
In summary, you can use either mdio or ethtool to read the PHY registers on the Jetson AGX Orin dev kit. ethtool is a more powerful tool that provides more features and options, but mdio is a simpler tool that is easier to use. Make sure to consult the documentation for the PHY chip manufacturer to understand the meaning of the register values.
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I was trying mdio, but the values are always 0. What is the difference between -d and -r, which are both 0x10?
I read where it said mdio should not be used when accessing 10G PHY. Is that true?
Malcolm
I am a little concerned about these LLM responses. First my mdio application does not support a “-d” option. Also, the ethtool doesn’t appear to read registers.
I go back to my original question. what app is best to read the PHY using mdio? Any documentation?
Malcolm