1 files changed, 53 insertions, 28 deletions

diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index e61d773cf65e..39c1cbf0e75d 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -125,9 +125,11 @@ static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)
         if (ret)
                 return ret;
 
-        ret = clk_prepare_enable(hsotg->clk);
-        if (ret)
-                return ret;
+        if (hsotg->clk) {
+                ret = clk_prepare_enable(hsotg->clk);
+                if (ret)
+                        return ret;
+        }
 
         if (hsotg->uphy)
                 ret = usb_phy_init(hsotg->uphy);
@@ -175,7 +177,8 @@ static int __dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)
         if (ret)
                 return ret;
 
-        clk_disable_unprepare(hsotg->clk);
+        if (hsotg->clk)
+                clk_disable_unprepare(hsotg->clk);
 
         ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
                                      hsotg->supplies);
@@ -212,14 +215,41 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
          */
         hsotg->phy = devm_phy_get(hsotg->dev, "usb2-phy");
         if (IS_ERR(hsotg->phy)) {
-                hsotg->phy = NULL;
+                ret = PTR_ERR(hsotg->phy);
+                switch (ret) {
+                case -ENODEV:
+                case -ENOSYS:
+                        hsotg->phy = NULL;
+                        break;
+                case -EPROBE_DEFER:
+                        return ret;
+                default:
+                        dev_err(hsotg->dev, "error getting phy %d\n", ret);
+                        return ret;
+                }
+        }
+
+        if (!hsotg->phy) {
                 hsotg->uphy = devm_usb_get_phy(hsotg->dev, USB_PHY_TYPE_USB2);
-                if (IS_ERR(hsotg->uphy))
-                        hsotg->uphy = NULL;
-                else
-                        hsotg->plat = dev_get_platdata(hsotg->dev);
+                if (IS_ERR(hsotg->uphy)) {
+                        ret = PTR_ERR(hsotg->uphy);
+                        switch (ret) {
+                        case -ENODEV:
+                        case -ENXIO:
+                                hsotg->uphy = NULL;
+                                break;
+                        case -EPROBE_DEFER:
+                                return ret;
+                        default:
+                                dev_err(hsotg->dev, "error getting usb phy %d\n",
+                                        ret);
+                                return ret;
+                        }
+                }
         }
 
+        hsotg->plat = dev_get_platdata(hsotg->dev);
+
         if (hsotg->phy) {
                 /*
                  * If using the generic PHY framework, check if the PHY bus
@@ -229,11 +259,6 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
                         hsotg->phyif = GUSBCFG_PHYIF8;
         }
 
-        if (!hsotg->phy && !hsotg->uphy && !hsotg->plat) {
-                dev_err(hsotg->dev, "no platform data or transceiver defined\n");
-                return -EPROBE_DEFER;
-        }
-
         /* Clock */
         hsotg->clk = devm_clk_get(hsotg->dev, "otg");
         if (IS_ERR(hsotg->clk)) {
@@ -342,20 +367,6 @@ static int dwc2_driver_probe(struct platform_device *dev)
         if (retval)
                 return retval;
 
-        irq = platform_get_irq(dev, 0);
-        if (irq < 0) {
-                dev_err(&dev->dev, "missing IRQ resource\n");
-                return irq;
-        }
-
-        dev_dbg(hsotg->dev, "registering common handler for irq%d\n",
-                irq);
-        retval = devm_request_irq(hsotg->dev, irq,
-                                  dwc2_handle_common_intr, IRQF_SHARED,
-                                  dev_name(hsotg->dev), hsotg);
-        if (retval)
-                return retval;
-
         res = platform_get_resource(dev, IORESOURCE_MEM, 0);
         hsotg->regs = devm_ioremap_resource(&dev->dev, res);
         if (IS_ERR(hsotg->regs))
@@ -390,6 +401,20 @@ static int dwc2_driver_probe(struct platform_device *dev)
 
         dwc2_set_all_params(hsotg->core_params, -1);
 
+        irq = platform_get_irq(dev, 0);
+        if (irq < 0) {
+                dev_err(&dev->dev, "missing IRQ resource\n");
+                return irq;
+        }
+
+        dev_dbg(hsotg->dev, "registering common handler for irq%d\n",
+                irq);
+        retval = devm_request_irq(hsotg->dev, irq,
+                                  dwc2_handle_common_intr, IRQF_SHARED,
+                                  dev_name(hsotg->dev), hsotg);
+        if (retval)
+                return retval;
+
         retval = dwc2_lowlevel_hw_enable(hsotg);
         if (retval)
                 return retval;