From: Felipe Balbi <balbi@ti.com>
Date: Thu, 24 May 2012 07:30:01 +0000 (+0300)
Subject: usb: dwc3: gadget: disable U1/U2 on disconnect
X-Git-Tag: v3.6-rc1~101^2~24^2~34^2~29
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c4430a26948b84c0d820e83f8c640229f960d3b6;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git

usb: dwc3: gadget: disable U1/U2 on disconnect

If we get a disconnect IRQ, we should take
the core out of low power mode so we can
reconnect afterwards.

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

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 867c476..054ee5e 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1906,11 +1906,9 @@ static void dwc3_clear_stall_all_ep(struct dwc3 *dwc)
 
 static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc)
 {
+	int			reg;
+
 	dev_vdbg(dwc->dev, "%s\n", __func__);
-#if 0
-	XXX
-	U1/U2 is powersave optimization. Skip it for now. Anyway we need to
-	enable it before we can disable it.
 
 	reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 	reg &= ~DWC3_DCTL_INITU1ENA;
@@ -1918,7 +1916,6 @@ static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc)
 
 	reg &= ~DWC3_DCTL_INITU2ENA;
 	dwc3_writel(dwc->regs, DWC3_DCTL, reg);
-#endif
 
 	dwc3_stop_active_transfers(dwc);
 	dwc3_disconnect_gadget(dwc);