On Fri, Jan 20, 2017 at 12:01:04PM -0800, Tony Lindgren wrote: > I noticed in sprz360i.pdf there's "Advisory 1.0.34 USB2PHY: Register > Accesses After a USB Subsystem Soft Reset May Lock Up the Entire System" > that seems to affect am335x revisions 1.0, 2.0 and 2.1: > > "The synchronization bridge connecting the USB2PHY register interface > to the L3S interconnect may hang and lock up the entire system. When > there is a sequence of any USB2PHY register access, followed by a USB > subsystem soft reset initiated with the SOFT_RESET bit in the SYSCONFIG > register, followed by any USB2PHY register access, the L3S interconnect > may hang on the second USB2PHY register access."
I understand this patch adds runtime PM in the am335x phy driver, but the message above is irrelevant. This advisory is meant for the PHY registers, not the phy-ctrl registers in the USBSS wrapper. Currently we don't touch any PHY register in any driver. Regards, -Bin. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
