AM3352: How to enable and use the second Ethernet port in UBOOT

Tony Tang

Mastermind 27822 points

Part Number: AM3352

#1. How to configure and use the second Ethernet port in UBOOT in RMII mode?

#2. According to the user guide, use the .dts to configure other than change code directly.

https://software-dl.ti.com/processor-sdk-linux/esd/docs/06_03_00_106/AM335X/linux/How_to_Guides/Board_Port/U-Boot.html

but how it works? where is the function call to parse dtb file to configure?

#3. I boot up StarterKit board with default image from SD card, compare dts pinmux with memory read from UBOOT, only rgmii1 pins are configured, rgmii2 pins are still in default mode 7. dto file is not parsed and configured?

over 3 years ago

0 Schuyler Patton over 3 years ago

TI__Mastermind 39110 points

Hi,

Do you only want to use the second port in RMII mode?

Only one port of the cpsw can be enabled to be used in U-Boot. This is the reason on the starter kit that only one port is enabled to answer your question #3. To answer question #2 ideally only the dts file has to be changed to switch from port 1 to port 2 for U-Boot. To answer question #1 I will need to consult with a fellow engineer.

Best Regards,

Schuyler

0 Tony Tang over 3 years ago in reply to Schuyler Patton

TI__Mastermind 27822 points

Schuyler Patton said:
Do you only want to use the second port in RMII mode?

Since only one port is available in UBOOT, then need to enable port 2 in this case. Please help.

0 Schuyler Patton over 3 years ago in reply to Tony Tang

TI__Mastermind 39110 points

Hi,

I will need to confer with development I will do that and get back to you.

Best Regards,

Schuyler

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AM3352: How to enable and use the second Ethernet port in UBOOT