> > > > the thing is that OTG adds a few extra bits and pieces to the PHY. For > > example we have extra states on the USB state machine, we have a few > > analog comparators (for VBUS and ID pin) and so on. So, when we _do_ > > have OTG, some of it is handled by the PHY. > > One more question before I make the v9. If you have two PHYs but only > one of the is OTG, how do you make sure the other PHY driver can not > take advantage of OTG utility? > > Peter, didn't you say that this is what you guys have, two > transceivers and only one of them is OTG? > Almost all Freescale i.MX SoCs have more than 1 USB Controllers, the first one is OTG's. The second (and Third/Fourth if have) one is Host only. Although the phy between OTG and host only are the same, the host only controllers have NO ID and VBUS pin in order to reduce the pin number of SoC. So Host only controller has NO OTG feature. > -- > heikki -- 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
