On Thu, Jan 26, 2012 at 11:34:44AM -0500, Alan Stern wrote: > On Thu, 26 Jan 2012, Oliver Neukum wrote: > > > > > We'd get the handling of multifunction devices for free putting functions > > > > into the device tree. > > > > > > Yes, but adding functions to the driver model is far from free. I'm > > > not saying we shouldn't do it eventually, but it will be quite a big > > > job. > > > > True, but the alternative is not doing PM at the function level, isn't it? > > Probably so. I doubt any USB 3.0 devices will support function PM any time soon. Link PM is pretty powerful, so I don't think we'll see function PM until USB 3.0 composite devices start appearing. Probably those won't until the class device specs are updated for USB 3.0. There's some USB video class device changes in the works, and I'll have to go see if those include function PM. So it's fine if these big changes don't get made, and we don't support function PM for a while. Sarah Sharp -- 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
