On Mon, 5 Dec 2011, Ondrej Wisniewski wrote: > Hi all, > > I am using the /g_file_storage/gadget driver. I was wondering if it is > possible to detect if a cable (and USB host) is connected to the USB > device port. > > Looks like the driver prints the following message to dmesg when the > host is connected: > g_file_storage gadget: full speed config #1 This is really just a side effect. The gadget driver itself isn't very aware of when the gadget is connected to a host. The UDC driver is responsible for all that stuff. > But there is no message when it is disconnected. So how can I check the > current status of the connection. Is there some status file in sysfs I > can look at? > Any other possibility? Felipe, Sebastian, this sounds like a good candidate for something to be added to the UDC core framework. Perhaps a pollable sysfs file containing the current connection/PHY status? The UDC driver would merely have to invoke a new core routine whenever the status changed. Alan Stern -- 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
