DP83867IR: Examples with driver usage in AM64-SDK

Paolo Mattachini

Part Number: DP83867IR

Hello,

I am trying to find some examples about how to use the DP83867IR Linux driver in the AM64 SDK but I cannot find any.

Please refer me to something I can look at, even if the example is located in some other SDK.

Best regards,
Paolo

over 2 years ago

0 Rahul over 2 years ago

TI__Expert 8721 points

Hi Paolo,

DP83867 driver is available on opensource Linux kernel, so it should also be available in the AM64 SDK.

Can you please describe in more details on the help required?

Regards,
Rahul

0 Paolo Mattachini over 2 years ago in reply to Rahul

Intellectual 290 points

I went through some examples in the SDK but I could not find any which referenced the driver.
Also by explicitly searching dp83867.c or dp83867.h I could not find anything.

If you could point out an example (name or path) in the SDK it would be great.

Thank you for you help,
Paolo

0 Rahul over 2 years ago in reply to Paolo Mattachini

TI__Expert 8721 points

Hi Paolo,

Here is the link to the Linux driver:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/phy/dp83867.c

I can forward your ticket to AM64 team to help with SDK queries.

Regards,
Rahul

0 Schuyler Patton over 2 years ago in reply to Rahul

TI__Mastermind 40080 points

Hi,

What type of examples are you looking for or what are trying to do? A short summary of operation is that once a driver is identified a common framework by the MDIO driver to access information from the PHY and is made available to ethtool.

Best Regards,

Schuyler

0 Paolo Mattachini over 2 years ago in reply to Rahul

Intellectual 290 points

Thank you Rahul, I already found that driver, but I was expecting to see it referenced somewhere via some

#include "dp83867.h"

I have just started to play with AM64 and the SDK so maybe I am making some mistakes or taking wrong assumptions along the way. If you can forward the ticket to the proper team it would be great.

Schuyler Patton I do not udnerstand how the driver is taken into account during the development, as I said above I was expecting some reference to it in the example code. What am I doing wrong?

Regards,
Paolo

+1 Schuyler Patton over 2 years ago in reply to Paolo Mattachini

TI__Mastermind 40080 points

Hi,

The dp83867 you are referencing is written to fit into the kernel network driver framework. There is not any development necessary to use a particular PHY. The PHY driver you are pointing to part of the Linux kernel source tree. The TI Linux kernel config is configured to pull in this driver. In addition to kernel config the other step required is adding the PHY node definition to your board DTS file.

From an application perspective the PHY driver is not referenced using socket API. There is a utility called ethtool that allows you to view PHY link status, link advertisements etc. From a developer point of the view the PHY selected fits into this framework and is essentially transparent when functioning properly.

Best Regards,

Schuyler

0 Paolo Mattachini over 2 years ago in reply to Schuyler Patton

Intellectual 290 points

Thank you Schuyler for your answer.

Where can I find the dts file? is there a tool for creating or editing it?

Best regards,

Paolo

0 Schuyler Patton over 2 years ago in reply to Paolo Mattachini

TI__Mastermind 40080 points

Hi,

You did not mentioned which TI processor that you are using so I will point to two different directories where DTS examples can be found.

All the DTS files for the TI AM64x EVM can be found here.

This directory contains examples for the AM65, AM64 and AM62.

Best Regards,

Schuyler

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DP83867IR: Examples with driver usage in AM64-SDK