Re: Mapping a usbfs device to the corresponding sysfs device.

[Greg KH <greg@xxxxxxxxx>]

On Fri, Jul 27, 2007 at 10:08:21AM -0400, Dave Mielke wrote:
> Given that the default kernel options seem to be excluding
> /sys/class/usb_device/ these days, what's the best way on a newer kernel to map
> a usbfs device to its corresponding sysfs device? Please understand that it's
> not reasonable, at least to us, to require that every user of a USB-connected
> braille display rebuild his kernel. Is there still a way to do the mapping?

It's easier to go from a sysfs device to a usbfs device, but I don't
understand the question really.  You want to know how to do it on newer
kernels but not older ones?  The mapping is still the same, nothing has
changed, you can still just look up the bus and device number from the
usbfs name and then walk sysfs to get the device.  That will work with
all kernel versions, right?

thanks,

greg k-h

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