AM6528: Application board PHY reset GPIO

Tony Tang

Mastermind 29772 points

Part Number: AM6528
Other Parts Discussed in Thread: DP83867IR

On AM65xx IDK board. the DP83867IR reset signal connect to GPIO:

On Base board, the GPIO connect to PRU GPO as below:

Question:

#1, Did not find the reset gp0 control pin in k3-am654-idk.dtso file

#2. Is the reset pin controlled by PRU firmware?

#3. can those pin be changed to other GPIO or PRU_GPO pin? if yes, how to change in software?

#4. And same questions to PHY INT signal.

over 3 years ago

0 Kallikuppa Sreenivasa over 3 years ago

TI__Guru**** 206590 points

Hello Tony,

Thank you for the query.

I will have to reassign to the Linux expert to answer your queries. Please not that the expert is on vacation this week and expect a delay in answer.

Regards,

Sreenivasa,

0 Bin Liu over 3 years ago

TI__Guru**** 174211 points

Hi Tony,

I am routing your query to our PRU Ethernet expert for comments.

0 Nick Saulnier over 3 years ago

TI__Guru** 106760 points

Hello Tony,

I am on vacation for the rest of August, so you might have to wait until September for comments from the Linux side. You can find the source files in arch/arm64/boot/dts/ti/k3-am654-idk.dts, and may find additional information by searching for "ti,am654-icssg-prueth" in Documentation/bindings/devicetree/

I am reassigning your question to the firmware team to comment on whether PRU firmware controls the reset pin and PHY INT signal.

Regards,

Nick

0 Tony Tang over 3 years ago in reply to Nick Saulnier

TI__Mastermind 29772 points

Nick,

I did not find anything about this pin in .any AM65x dts files.

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AM6528: Application board PHY reset GPIO