From mboxrd@z Thu Jan 1 00:00:00 1970 From: balbi@ti.com (Felipe Balbi) Date: Tue, 4 Aug 2015 16:35:53 -0500 Subject: [PATCH] musb: sunxi: Ignore VBus errors in host-only mode In-Reply-To: <1438723553-4136-1-git-send-email-hdegoede@redhat.com> References: <1438723553-4136-1-git-send-email-hdegoede@redhat.com> Message-ID: <20150804213553.GI9623@saruman.tx.rr.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Aug 04, 2015 at 11:25:53PM +0200, Hans de Goede wrote: > For some unclear reason sometimes we get VBus errors in host-only mode, > even though we do not have any vbus-detection then. Ignore these. > > Signed-off-by: Hans de Goede > --- > drivers/usb/musb/sunxi.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c > index f9f6304..34ce5df 100644 > --- a/drivers/usb/musb/sunxi.c > +++ b/drivers/usb/musb/sunxi.c > @@ -194,6 +194,10 @@ static irqreturn_t sunxi_musb_interrupt(int irq, void *__hci) > musb_writeb(musb->mregs, MUSB_FADDR, 0); > } > > + /* Ignore Vbus errors when in host only mode */ > + if (musb->port_mode == MUSB_PORT_MODE_HOST) > + musb->int_usb &= ~MUSB_INTR_VBUSERROR; check with a scope if VBUS is really dropping. Host does VBUS detection indeed, at a minimum, for overcurrent protection. You might have something causing VBUS to drop and that something needs to be found, rather than masked. -- balbi -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: