phy: ti: usb2: Fix logic on -EPROBE_DEFER

commit 3eb2c07d00cc22254ad6fe12ee0c391dd7146e71 upstream.

If clk_get() returns -EPROBE_DEFER then we should just
return instead of falling back to old clock name.

Use clk_prepare_enable() and clk_disable_unprepare() instead
of splitting up prepare/unprepare from enable/disable.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

drivers/phy/ti/phy-omap-usb2.c

@@ -135,9 +135,9 @@ static int omap_usb_power_on(struct phy *x)
 
 static int omap_usb2_disable_clocks(struct omap_usb *phy)
 {
-	clk_disable(phy->wkupclk);
+	clk_disable_unprepare(phy->wkupclk);
 	if (!IS_ERR(phy->optclk))
-		clk_disable(phy->optclk);
+		clk_disable_unprepare(phy->optclk);
 
 	return 0;
 }
@@ -146,14 +146,14 @@ static int omap_usb2_enable_clocks(struct omap_usb *phy)
 {
 	int ret;
 
-	ret = clk_enable(phy->wkupclk);
+	ret = clk_prepare_enable(phy->wkupclk);
 	if (ret < 0) {
 		dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
 		goto err0;
 	}
 
 	if (!IS_ERR(phy->optclk)) {
-		ret = clk_enable(phy->optclk);
+		ret = clk_prepare_enable(phy->optclk);
 		if (ret < 0) {
 			dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
 			goto err1;
@@ -346,63 +346,72 @@ static int omap_usb2_probe(struct platform_device *pdev)
 		}
 	}
 
-	otg->set_host		= omap_usb_set_host;
-	otg->set_peripheral	= omap_usb_set_peripheral;
-	if (phy_data->flags & OMAP_USB2_HAS_SET_VBUS)
-		otg->set_vbus		= omap_usb_set_vbus;
-	if (phy_data->flags & OMAP_USB2_HAS_START_SRP)
-		otg->start_srp		= omap_usb_start_srp;
-	otg->usb_phy		= &phy->phy;
-
-	platform_set_drvdata(pdev, phy);
-	pm_runtime_enable(phy->dev);
-
-	generic_phy = devm_phy_create(phy->dev, NULL, &ops);
-	if (IS_ERR(generic_phy)) {
-		pm_runtime_disable(phy->dev);
-		return PTR_ERR(generic_phy);
-	}
-
-	phy_set_drvdata(generic_phy, phy);
-	omap_usb_power_off(generic_phy);
-
-	phy_provider = devm_of_phy_provider_register(phy->dev,
-			of_phy_simple_xlate);
-	if (IS_ERR(phy_provider)) {
-		pm_runtime_disable(phy->dev);
-		return PTR_ERR(phy_provider);
-	}
 
 	phy->wkupclk = devm_clk_get(phy->dev, "wkupclk");
 	if (IS_ERR(phy->wkupclk)) {
-		dev_warn(&pdev->dev, "unable to get wkupclk, trying old name\n");
+		if (PTR_ERR(phy->wkupclk) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+
+		dev_warn(&pdev->dev, "unable to get wkupclk %ld, trying old name\n",
+			 PTR_ERR(phy->wkupclk));
 		phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
+
 		if (IS_ERR(phy->wkupclk)) {
-			dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
-			pm_runtime_disable(phy->dev);
+			if (PTR_ERR(phy->wkupclk) != -EPROBE_DEFER)
+				dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
 			return PTR_ERR(phy->wkupclk);
 		} else {
 			dev_warn(&pdev->dev,
 				 "found usb_phy_cm_clk32k, please fix DTS\n");
 		}
 	}
-	clk_prepare(phy->wkupclk);
 
 	phy->optclk = devm_clk_get(phy->dev, "refclk");
 	if (IS_ERR(phy->optclk)) {
+		if (PTR_ERR(phy->optclk) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+
 		dev_dbg(&pdev->dev, "unable to get refclk, trying old name\n");
 		phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
+
 		if (IS_ERR(phy->optclk)) {
-			dev_dbg(&pdev->dev,
-				"unable to get usb_otg_ss_refclk960m\n");
+			if (PTR_ERR(phy->optclk) != -EPROBE_DEFER) {
+				dev_dbg(&pdev->dev,
+					"unable to get usb_otg_ss_refclk960m\n");
+			}
 		} else {
 			dev_warn(&pdev->dev,
 				 "found usb_otg_ss_refclk960m, please fix DTS\n");
 		}
 	}
 
-	if (!IS_ERR(phy->optclk))
-		clk_prepare(phy->optclk);
+	otg->set_host = omap_usb_set_host;
+	otg->set_peripheral = omap_usb_set_peripheral;
+	if (phy_data->flags & OMAP_USB2_HAS_SET_VBUS)
+		otg->set_vbus = omap_usb_set_vbus;
+	if (phy_data->flags & OMAP_USB2_HAS_START_SRP)
+		otg->start_srp = omap_usb_start_srp;
+	otg->usb_phy = &phy->phy;
+
+	platform_set_drvdata(pdev, phy);
+	pm_runtime_enable(phy->dev);
+
+	generic_phy = devm_phy_create(phy->dev, NULL, &ops);
+	if (IS_ERR(generic_phy)) {
+		pm_runtime_disable(phy->dev);
+		return PTR_ERR(generic_phy);
+	}
+
+	phy_set_drvdata(generic_phy, phy);
+	omap_usb_power_off(generic_phy);
+
+	phy_provider = devm_of_phy_provider_register(phy->dev,
+						     of_phy_simple_xlate);
+	if (IS_ERR(phy_provider)) {
+		pm_runtime_disable(phy->dev);
+		return PTR_ERR(phy_provider);
+	}
+
 
 	usb_add_phy_dev(&phy->phy);
 
@@ -413,9 +422,6 @@ static int omap_usb2_remove(struct platform_device *pdev)
 {
 	struct omap_usb	*phy = platform_get_drvdata(pdev);
 
-	clk_unprepare(phy->wkupclk);
-	if (!IS_ERR(phy->optclk))
-		clk_unprepare(phy->optclk);
 	usb_remove_phy(&phy->phy);
 	pm_runtime_disable(phy->dev);