On 12/27/2017 11:28 AM, Al Cooper wrote: > From: Al Cooper <al.coo...@broadcom.com> > > This is caused by a bug in the BDC core. When the BDC core comes > out of reset and it's not selected, it gets a backup clock. When > the BDC core is selected, it get's the main clock. If HOST mode > is then selected the BDC core has the main clock shut off but > the backup clock is not restored. > > The failure scenario and cause are as follows: > - DRD mode is active > - Device mode is selected first in bootloader > - When host mode is now selected, the clock to the BDC is cut off. > - BDC registers are inaccessible and therefore the BDC driver > crashes upon Linux boot. > > The fix is to have the phy driver always force a BDC reset on > startup. > > Fixes: 49859e55e364 ("phy: usb: phy-brcm-usb: Add Broadcom STB USB phy > driver") > Signed-off-by: Al Cooper <alcoop...@gmail.com>
Acked-by: Florian Fainelli <f.faine...@gmail.com> -- Florian