@@ -116,6 +116,8 @@ void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode)
 }
 
 static int dwc3_core_soft_reset(struct dwc3 *dwc);
+static void dwc3_core_exit(struct dwc3 *dwc);
+static int dwc3_core_init_for_resume(struct dwc3 *dwc);
 
 static void __dwc3_set_mode(struct work_struct *work)
 {

@@ -131,10 +133,11 @@ static void __dwc3_set_mode(struct work_struct *work)
 	if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_OTG)
 		dwc3_otg_update(dwc, 0);
 
-	if (!dwc->desired_dr_role)
+	if (!dwc->desired_dr_role && !dwc->role_switch_reset_quirk)
 		goto out;
 
-	if (dwc->desired_dr_role == dwc->current_dr_role)
+	if (dwc->desired_dr_role == dwc->current_dr_role &&
+			!dwc->role_switch_reset_quirk)
 		goto out;
 
 	if (dwc->desired_dr_role == DWC3_GCTL_PRTCAP_OTG && dwc->edev)

@@ -159,6 +162,34 @@ static void __dwc3_set_mode(struct work_struct *work)
 		break;
 	}
 
+	if (dwc->role_switch_reset_quirk) {
+		if (dwc->current_dr_role) {
+			dwc->current_dr_role = 0;
+			dwc3_core_exit(dwc);
+		}
+
+		if (dwc->desired_dr_role) {
+			/*
+			 * the first call to __dwc3_set_mode comes from
+			 * dwc3_drd_init. In that case dwc3_core_init has been
+			 * called but dwc->current_dr_role is zero such that
+			 * we must not reinitialize the core again here.
+			 */
+			if (dwc->role_switch_reset_quirk_initialized) {
+				ret = dwc3_core_init_for_resume(dwc);
+				if (ret) {
+					dev_err(dwc->dev,
+					    "failed to reinitialize core\n");
+					goto out;
+				}
+			}
+
+			dwc->role_switch_reset_quirk_initialized = 1;
+		} else {
+			goto out;
+		}
+	}
+
 	/* For DRD host or device mode only */
 	if (dwc->desired_dr_role != DWC3_GCTL_PRTCAP_OTG) {
 		reg = dwc3_readl(dwc->regs, DWC3_GCTL);

@@ -1425,6 +1456,9 @@ static void dwc3_get_properties(struct dwc3 *dwc)
 	dwc->dis_split_quirk = device_property_read_bool(dev,
 				"snps,dis-split-quirk");
 
+	dwc->role_switch_reset_quirk = device_property_read_bool(dev,
+				"snps,role-switch-reset-quirk");
+
 	dwc->lpm_nyet_threshold = lpm_nyet_threshold;
 	dwc->tx_de_emphasis = tx_de_emphasis;
 

@@ -1744,7 +1778,6 @@ static int dwc3_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
 static int dwc3_core_init_for_resume(struct dwc3 *dwc)
 {
 	int ret;

@@ -1771,6 +1804,7 @@ static int dwc3_core_init_for_resume(struct dwc3 *dwc)
 	return ret;
 }
 
+#ifdef CONFIG_PM
 static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
 {
 	unsigned long	flags;

@@ -1086,6 +1086,9 @@ struct dwc3_scratchpad_array {
  *	3	- Reserved
  * @dis_metastability_quirk: set to disable metastability quirk.
  * @dis_split_quirk: set to disable split boundary.
+ * @role_switch_reset_quirk: set to force reinitialization after any role switch
+ * @role_switch_reset_quirk_initialized: set to true after the first role switch
+ *			which is triggered from dwc3_drd_init directly
  * @imod_interval: set the interrupt moderation interval in 250ns
  *			increments or 0 to disable.
  * @max_cfg_eps: current max number of IN eps used across all USB configs.

@@ -1299,6 +1302,9 @@ struct dwc3 {
 	unsigned		dis_split_quirk:1;
 	unsigned		async_callbacks:1;
 
+	unsigned		role_switch_reset_quirk:1;
+	unsigned		role_switch_reset_quirk_initialized:1;
+
 	u16			imod_interval;
 
 	int			max_cfg_eps;

@@ -506,6 +506,9 @@ static int dwc3_usb_role_switch_set(struct usb_role_switch *sw,
 		break;
 	}
 
+	if (dwc->role_switch_reset_quirk && role == USB_ROLE_NONE)
+		mode = 0;
+
 	dwc3_set_mode(dwc, mode);
 	return 0;
 }

@@ -534,6 +537,10 @@ static enum usb_role dwc3_usb_role_switch_get(struct usb_role_switch *sw)
 			role = USB_ROLE_DEVICE;
 		break;
 	}
+
+	if (dwc->role_switch_reset_quirk && !dwc->current_dr_role)
+		role = USB_ROLE_NONE;
+
 	spin_unlock_irqrestore(&dwc->lock, flags);
 	return role;
 }