From: Felipe Balbi <balbi@ti.com>
Date: Thu, 19 Dec 2013 22:37:05 +0000 (-0600)
Subject: usb: dwc3: gadget: make sure HIRD threshold is 0 in superspeed
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=356363bf6b2fc4785d874ef87ed2fad4b8543490;p=deliverable%2Flinux.git

usb: dwc3: gadget: make sure HIRD threshold is 0 in superspeed

During superspeed, HIRD threshold should always
be zero. Curent driver wasn't making sure that
was the case.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 3934d0afc185..df9749eac6ac 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2288,6 +2288,10 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
 		 */
 		reg |= DWC3_DCTL_HIRD_THRES(12);
 
+		dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+	} else {
+		reg = dwc3_readl(dwc->regs, DWC3_DCTL);
+		reg &= ~DWC3_DCTL_HIRD_THRES_MASK;
 		dwc3_writel(dwc->regs, DWC3_DCTL, reg);
 	}