• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 97 subscribers
  • Views 491 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AM3715 EHCI remote wakeup

xu hugh
Prodigy 60 points

Hi, 

I'm working on TI EHCI usb remote wake up. something confused me, I want someone can tell me more information.

This device has a ULPI chip(SMSC3320). Usb device connected to device via the PHY.

When the device suspends, the device also suspends. remote wake up is enabled. but when the usb device wakes up, the device can not wake up. but I can see the system's current increased to 170mA. 

SO, I think, the OMAP must do something, but can not wake up the system. I turned on the debug option, but no message can be read. 

Is there any way that can wake up the device?

BTW, EHCI has a problem to communicate. If there is no usb device connected to USB port. when system suspend, the PHY can not enter into low power mode. I forced it into low power mode, but can not wake up.

  • 0
    Prodigy 60 points

    Hi,

    when system resumes, the PRCM module can detect the USB HOST wake up event?

    I found there are dependency between different module power domains. If other power domain wakes up, can it wakes up the USB host power domain?