Does BeaglePlay Ethernet Support Wake-on-LAN (WoL)?

General Discussion
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1

Hi everyone,

I am trying to enable Wake-on-LAN (WoL) on my BeaglePlay board but haven’t been able to get it working.

I have checked using ethtool:

ethtool eth0 | grep Wake-on

It shows Wake-on: d, which means it’s disabled, and I cannot enable it using:

ethtool -s eth0 wol g

Before debugging further, I would like to confirm:

  1. Does the BeaglePlay hardware support WoL?

Which Ethernet PHY is used on the board?

Does it have a dedicated PME (Power Management Event) interrupt for wake-up?

Is there any hardware limitation preventing WoL?

  1. Is WoL supported in the BeaglePlay device tree and kernel?

Do I need to modify the Device Tree (DTS) to enable wake-on-lan?

Does the AM625 Ethernet driver support WoL?

  1. Does U-Boot need any configuration for WoL?

If WoL is supported, is there a U-Boot setting to enable it?

Any insights or documentation links would be greatly appreciated! Thanks in advance.

2

The external ‘phy’ might natively support it as on option, but nothing on the Play is wired for it.

3

This wasn’t a specifically required feature fed into design, no, but let’s not give up before we take a look–it might have either been considered or we might get lucky.

You can jump to the location in the documentation for the Ethernet at Design and specifications — BeagleBoard Documentation.

It is a Realtek RTL8211F-CG.

Per the datasheet, INTB/PMEB can be configured to generate a PME that is active-low and should be pulled-up to enable this function.

I had to go to the schematic to find the circuit showing the pull-up and level shifter (between PHY 3.3V and SoC 1.8V) on INTB which is fed into the AM62’s GBE_INTn.

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GBE_INTn is provided on ball L21. According to SYSCONFIG (and notes on the schematic), this is GPIO0_42. This is in the

Well, I don’t think you can shut the power to the processor completely off and perform a wake, but you might be able to go into suspend-to-disk and wake.

Well, Robert would know this and it seems like the answer is no. Looking at a related E2E question, it seems the TI SDK (9.0) as of a year ago only supported wake-up from MCU-domain GPIOs, not MAIN-domain GPIOs, like GPIO0_42.

It could be worth following-up to see if this year’s SDK (10 vs. 9 for last year) has the Wake-on-LAN validated or if additional sleep modes are supported besides DeepSleep and MCU-only modes. They indicated 9.1 would have wake from MAIN GPIO pins and 10.0 has been out a while.

In the end, it looks possible to me, but will need some software work and the lowest-possible sleep modes for the processor might not be possible, but at least entering some kind of suspend mode should be possible.