usb: host: xhci-plat: Add otg device to platform data

Host controllers that are part of an OTG/dual-role instance
need to somehow pass the OTG controller device information
to the HCD core.

We use platform data to pass the OTG controller device.

Signed-off-by: Roger Quadros <rogerq@ti.com>
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 676ea45..24d030a 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -239,11 +239,20 @@
 			goto put_usb3_hcd;
 	}
 
-	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
+	if (pdata && pdata->otg_dev)
+		ret = usb_otg_add_hcd(hcd, irq, IRQF_SHARED, pdata->otg_dev);
+	else
+		ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
+
 	if (ret)
 		goto disable_usb_phy;
 
-	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
+	if (pdata && pdata->otg_dev)
+		ret = usb_otg_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED,
+				      pdata->otg_dev);
+	else
+		ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
+
 	if (ret)
 		goto dealloc_usb2_hcd;
 
@@ -251,7 +260,10 @@
 
 
 dealloc_usb2_hcd:
-	usb_remove_hcd(hcd);
+	if (pdata && pdata->otg_dev)
+		usb_otg_remove_hcd(hcd);
+	else
+		usb_remove_hcd(hcd);
 
 disable_usb_phy:
 	usb_phy_shutdown(hcd->usb_phy);
@@ -269,16 +281,25 @@
 	return ret;
 }
 
-static int xhci_plat_remove(struct platform_device *dev)
+static int xhci_plat_remove(struct platform_device *pdev)
 {
-	struct usb_hcd	*hcd = platform_get_drvdata(dev);
+	struct usb_hcd	*hcd = platform_get_drvdata(pdev);
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
 	struct clk *clk = xhci->clk;
+	struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev);
 
-	usb_remove_hcd(xhci->shared_hcd);
+	if (pdata && pdata->otg_dev)
+		usb_otg_remove_hcd(xhci->shared_hcd);
+	else
+		usb_remove_hcd(xhci->shared_hcd);
+
 	usb_phy_shutdown(hcd->usb_phy);
 
-	usb_remove_hcd(hcd);
+	if (pdata && pdata->otg_dev)
+		usb_otg_remove_hcd(hcd);
+	else
+		usb_remove_hcd(hcd);
+
 	usb_put_hcd(xhci->shared_hcd);
 
 	if (!IS_ERR(clk))
diff --git a/include/linux/usb/xhci_pdriver.h b/include/linux/usb/xhci_pdriver.h
index 376654b..5c68b83 100644
--- a/include/linux/usb/xhci_pdriver.h
+++ b/include/linux/usb/xhci_pdriver.h
@@ -18,10 +18,13 @@
  *
  * @usb3_lpm_capable:	determines if this xhci platform supports USB3
  *			LPM capability
+ * @otg_dev:		OTG controller device. Only requied if part of
+ *			OTG/dual-role.
  *
  */
 struct usb_xhci_pdata {
 	unsigned	usb3_lpm_capable:1;
+	struct device	*otg_dev;
 };
 
 #endif /* __USB_CORE_XHCI_PDRIVER_H */