On 22/11/13 16:33, Sebastian Andrzej Siewior wrote: > On 11/22/2013 04:55 PM, Mark Jackson wrote: >> The IDDIG input pin is normally used to determine the USB mode >> (i.e. HOST or DEVICE). >> >> On some systems (e.g. AM335x) leaving this pin floating allows >> the USB mode to be set via software. > > So you have a board where musb is used only as host or only as device > and the ID pin not on ground or 3.3V? > What are the side effects? I remember correctly Bin wanted to avoid > settings this if it could be avoided. Yes ... we have a host only USB port and an unconnected ID pin. AFAIK it defaults to device mode so I can't see any devices that get plugged into the USB port. If I tweak the s/w to "force" host mode on, then everything appears to work okay. I guess it's more of a hardware oversight that we left the pin floating but in the real world, I guess someone may want this feature to they can change the usb port type ? Either way, I need to fix the current h/w (which can be done via s/w) hence the patch. Mark J. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
