Hi Community member,
Please let me advice for the following phenomenon.
[Phenomenon]
My customer have used the USBs function for their application. One of them, the USB0 is used device mode, and others is used host mode.When they removed the USB cable for USB0, the USB1(Host) disconnected. Thus, we asked to my customer to check the USB1_VBUS.As a result, the voltage of USB1_VBUS was below 4.4V by noise. So I think that this phenomenon is caused by noise.However when checked the interrupt of USB1IRQSTATRAW1, the value is 0x000C. It means that Sitara was not set the USB_8 and USB_7. Thus, it seems that this phenomenon is not caused by that noise.
Just for your information, when the USB1 was powered down, the kernel showed "CAUTION: musb: Babble Interrupt Occurred".
Do you have any idea?
If you need more information in order to resolve this, please let me know.
Best regards.
Kaka