On Thu, May 14, 2020 at 03:33:25PM +0800, Min Guo wrote: > On Thu, 2020-05-14 at 12:01 +0800, Macpaul Lin wrote: > > When receiving reset interrupt, FADDR need to be reset to zero in > > periphearl mode. Otherwise ep0 cannot do enumeration when re-pluging USB > > cable. > > > > Signed-off-by: Macpaul Lin <macpaul.lin@xxxxxxxxxxxx> > > --- > > drivers/usb/musb/mediatek.c | 6 ++++++ > > 1 file changed, 6 insertions(+) > > > > diff --git a/drivers/usb/musb/mediatek.c b/drivers/usb/musb/mediatek.c > > index 6196b0e..eebeadd 100644 > > --- a/drivers/usb/musb/mediatek.c > > +++ b/drivers/usb/musb/mediatek.c > > @@ -208,6 +208,12 @@ static irqreturn_t generic_interrupt(int irq, void *__hci) > > musb->int_rx = musb_clearw(musb->mregs, MUSB_INTRRX); > > musb->int_tx = musb_clearw(musb->mregs, MUSB_INTRTX); > > > > + if ((musb->int_usb & MUSB_INTR_RESET) && !is_host_active(musb)) { > > + /* ep0 FADDR must be 0 when (re)entering peripheral mode */ > > + musb_ep_select(musb->mregs, 0); > > + musb_writeb(musb->mregs, MUSB_FADDR, 0); > > + } > > + > > if (musb->int_usb || musb->int_tx || musb->int_rx) > > retval = musb_interrupt(musb); > > > > Acked-by:Min Guo <min.guo@xxxxxxxxxxxx> > Queued for v5.8. Thanks. -Bin.