From: Gregory Herrero <gregory.herrero@xxxxxxxxx>
During vbus session, usb controller needs to exit hibernation if it was
previously in suspend state.
Since controller will be resetted and configured, there is no need
to restore registers.
Signed-off-by: Gregory Herrero <gregory.herrero@xxxxxxxxx>
---
drivers/usb/dwc2/gadget.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 72df171..bb83826 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3205,6 +3205,14 @@ static int s3c_hsotg_vbus_session(struct usb_gadget *gadget, int is_active)
spin_lock_irqsave(&hsotg->lock, flags);
if (is_active) {
+ /*
+ * If controller is hibernated, it must exit from hibernation
+ * before being initialized
+ */
+ if (hsotg->lx_state == DWC2_L2) {
+ dwc2_exit_hibernation(hsotg, false);
+ hsotg->lx_state = DWC2_L0;
+ }
/* Kill any ep0 requests as controller will be reinitialized */
kill_all_requests(hsotg, hsotg->eps_out[0], -ECONNRESET);
s3c_hsotg_core_init_disconnected(hsotg, false);
--
1.9.1
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