From: Gregory Herrero <gregory.herrero@intel.com>
Date: Fri, 30 Jan 2015 08:09:37 +0000 (+0100)
Subject: usb: dwc2: gadget: initialize controller in pullup callback
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b4c2378df6419b81eefcb9cd56726321c29a70ca;p=linux-beck.git

usb: dwc2: gadget: initialize controller in pullup callback

USB reset interrupt is no more used to reset the controller.
Thus, reset the controller in pullup callback as described by
Synopsys programming guide. Otherwise enumeration sometimes
fails when usb configuration is switched without physical
disconnection.

Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index f201f6d17bc7..15aa5785090b 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3162,6 +3162,7 @@ static int s3c_hsotg_pullup(struct usb_gadget *gadget, int is_on)
 	if (is_on) {
 		clk_enable(hsotg->clk);
 		hsotg->enabled = 1;
+		s3c_hsotg_core_init_disconnected(hsotg, false);
 		s3c_hsotg_core_connect(hsotg);
 	} else {
 		s3c_hsotg_core_disconnect(hsotg);