Sounds like you may have a HW issue. But that is only a guess based on a few sentences from you. A schematic could help in understanding this issue.
Gerald On Wed, Dec 2, 2015 at 10:41 AM, Iñigo Martínez <[email protected]> wrote: > > Hi, > > We have build a custom cape, with an USB 2514 hub chip[0], with several > devices connected not powered by the USB, and a socket for an external > battery as a power source backup. > > With this scenario, we are testing the cape when power source is missing > (just unpluging the 5V power source), but the hub starts to fail stating > that there is no power, even with the battery connected. This are the > messages we see on battery power: > > Dec 2 16:18:38 baliza1 kernel: [ 2631.231775] musb-hdrc musb-hdrc.1.auto: > VBUS_ERROR in a_host (91, <VBusValid), retry #1, port1 00000507 > Dec 2 16:18:38 baliza1 kernel: [ 2631.449402] musb-hdrc musb-hdrc.1.auto: > VBUS_ERROR in a_wait_vrise (91, <VBusValid), retry #2, port1 00000507 > Dec 2 16:18:38 baliza1 kernel: [ 2631.601845] musb-hdrc musb-hdrc.1.auto: > VBUS_ERROR in a_wait_vrise (91, <VBusValid), retry #3, port1 00000507 > Dec 2 16:18:39 baliza1 kernel: [ 2631.754267] musb-hdrc musb-hdrc.1.auto: > VBUS_ERROR in a_wait_vrise (90, <VBusValid), retry #3, port1 0008050f > > Looking at the messages looks like that even with external power, it > powers off the hub and the different devices connected to it. Is there any > setup/workaround that we can do to avoid this problem ? > > Best regards, > > [0] > http://www.microchip.com/DevelopmentTools/ProductDetails.aspx?PartNO=EVB-USB2514B-FS > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- Gerald [email protected] http://beagleboard.org/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
