Messages in this thread | | | Date | Tue, 20 Mar 2012 10:52:38 -0500 | From | ddegraff <> | Subject | Re: arm: davinci: USB ethernet |
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On 03/20/2012 08:58 AM, Greg KH wrote: > On Mon, Mar 19, 2012 at 05:46:02AM -0500, Darryl wrote: >> We are currently using a DA850 eval board but will eventually use a >> custom board to interface host system to davinci using ethernet over >> USB. We are using 2.6.37 with real-time patches, but a cursory look >> (have not been able to build yet) at 3.3-rc7 suggests that the >> issues noted below still exist. >> >> There are currently two issues: >> >> - Documentation/usb/hotplug.txt suggests that the drivers should be >> built as modules so that such things as loading drivers and, in this >> case, bringing up the interface, can ge moderated in user-space. >> However, though the code can be build modular, the drivers are never >> loaded. I suspect that one or more of the several relevant configs >> (I see at least these: USB_MUSB_HDRC, USB_MUSB_DA8XX_GLUE, >> USB_GADGET, USB_ETH, USB_GPIO_VBUS, NOP_USB_XCEIV, USB_ETH_RNDIS, >> USB_OTG_UTILS) are required to be built in, but cannot seem to >> determine the correct ones. > Do you have a userspace tool that will automatically load the proper > modules when they show up? Busybox's mdev is currently intended for that. I've used udev for other projects, but we have a very limited space here. More important at the moment, however, is getting notifications in userspace. > > As for unwinding the .config issues, you will have to do this, based on > your own settings, not much we can do here. It is my hope that the developers from TI and MonteVista will weigh in since I have, so far, unsuccessfully unwound the interactions. > >> - Even when compiling all the driver code built-in, neither the >> plug-in nor plug-out event is propagated to user space, again, so >> that the interface can be brought up. > How do you know it isn't showing up? What are you using to watch for > it? Are you using udev? Something else? devtmpfs? As noted above, mdev, which is set as the userspace hotplug script (via echo its full path to /proc/sys/kernel/hotplug) which I have slightly modified to just log that it is being run, and see no output messages. > > greg k-h > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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