Revert "usb: ehci/ohci-exynos: Fix PHY getting sequence"

This reverts commit 039368901a.

Vivek writes:
	We not longer need this patch, since we have planned to remove
	the usb-phy drivers for samsung [1], we have completely deleted
	the support for the the same from ohci-exynos and ehci-exynos
	drivers too [2].  Sorry for the confusion, but this patch can be
	dropped and instead we can pick the patches in [2].

	[1] http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg35774.html
	[2] https://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg35695.html
	    https://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg35696.html

Cc: Sachin Kamat <sachin.kamat@samsung.com>
Cc: Vivek Gautam <gautam.vivek@samsung.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Sachin Kamat <sachin.kamat@samsung.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ehci-exynos.c

@@ -62,6 +62,18 @@ static int exynos_ehci_get_phy(struct device *dev,
 	int phy_number;
 	int ret = 0;
 
+	exynos_ehci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
+	if (IS_ERR(exynos_ehci->phy)) {
+		ret = PTR_ERR(exynos_ehci->phy);
+		if (ret != -ENXIO && ret != -ENODEV) {
+			dev_err(dev, "no usb2 phy configured\n");
+			return ret;
+		}
+		dev_dbg(dev, "Failed to get usb2 phy\n");
+	} else {
+		exynos_ehci->otg = exynos_ehci->phy->otg;
+	}
+
 	for_each_available_child_of_node(dev->of_node, child) {
 		ret = of_property_read_u32(child, "reg", &phy_number);
 		if (ret) {
@@ -78,27 +90,15 @@ static int exynos_ehci_get_phy(struct device *dev,
 
 		phy = devm_of_phy_get(dev, child, NULL);
 		of_node_put(child);
-		if (IS_ERR(phy))
-			/* Lets fallback to older USB-PHYs */
-			goto usb_phy_old;
-		exynos_ehci->phy_g[phy_number] = phy;
-		/* Make the older PHYs unavailable */
-		exynos_ehci->phy = ERR_PTR(-ENXIO);
-	}
-
-	return 0;
-
-usb_phy_old:
-	exynos_ehci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
-	if (IS_ERR(exynos_ehci->phy)) {
-		ret = PTR_ERR(exynos_ehci->phy);
-		if (ret != -ENXIO && ret != -ENODEV) {
-			dev_err(dev, "no usb2 phy configured\n");
-			return ret;
+		if (IS_ERR(phy)) {
+			ret = PTR_ERR(phy);
+			if (ret != -ENOSYS && ret != -ENODEV) {
+				dev_err(dev, "no usb2 phy configured\n");
+				return ret;
+			}
+			dev_dbg(dev, "Failed to get usb2 phy\n");
 		}
-		dev_dbg(dev, "Failed to get usb2 phy\n");
-	} else {
-		exynos_ehci->otg = exynos_ehci->phy->otg;
+		exynos_ehci->phy_g[phy_number] = phy;
 	}
 
 	return ret;

drivers/usb/host/ohci-exynos.c

@@ -51,12 +51,27 @@ static int exynos_ohci_get_phy(struct device *dev,
 	int phy_number;
 	int ret = 0;
 
+	exynos_ohci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
+	if (IS_ERR(exynos_ohci->phy)) {
+		ret = PTR_ERR(exynos_ohci->phy);
+		if (ret != -ENXIO && ret != -ENODEV) {
+			dev_err(dev, "no usb2 phy configured\n");
+			return ret;
+		}
+		dev_dbg(dev, "Failed to get usb2 phy\n");
+	} else {
+		exynos_ohci->otg = exynos_ohci->phy->otg;
+	}
+
 	/*
 	 * Getting generic phy:
 	 * We are keeping both types of phys as a part of transiting OHCI
 	 * to generic phy framework, so as to maintain backward compatibilty
-	 * with old DTB too.
-	 * We fallback to older USB-PHYs when we fail to get generic PHYs.
+	 * with old DTB.
+	 * If there are existing devices using DTB files built from them,
+	 * to remove the support for old bindings in this driver,
+	 * we need to make sure that such devices have their DTBs
+	 * updated to ones built from new DTS.
 	 */
 	for_each_available_child_of_node(dev->of_node, child) {
 		ret = of_property_read_u32(child, "reg", &phy_number);
@@ -74,27 +89,15 @@ static int exynos_ohci_get_phy(struct device *dev,
 
 		phy = devm_of_phy_get(dev, child, NULL);
 		of_node_put(child);
-		if (IS_ERR(phy))
-			/* Lets fallback to older USB-PHYs */
-			goto usb_phy_old;
-		exynos_ohci->phy_g[phy_number] = phy;
-		/* Make the older PHYs unavailable */
-		exynos_ohci->phy = ERR_PTR(-ENXIO);
-	}
-
-	return 0;
-
-usb_phy_old:
-	exynos_ohci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
-	if (IS_ERR(exynos_ohci->phy)) {
-		ret = PTR_ERR(exynos_ohci->phy);
-		if (ret != -ENXIO && ret != -ENODEV) {
-			dev_err(dev, "no usb2 phy configured\n");
-			return ret;
+		if (IS_ERR(phy)) {
+			ret = PTR_ERR(phy);
+			if (ret != -ENOSYS && ret != -ENODEV) {
+				dev_err(dev, "no usb2 phy configured\n");
+				return ret;
+			}
+			dev_dbg(dev, "Failed to get usb2 phy\n");
 		}
-		dev_dbg(dev, "Failed to get usb2 phy\n");
-	} else {
-		exynos_ohci->otg = exynos_ohci->phy->otg;
+		exynos_ohci->phy_g[phy_number] = phy;
 	}
 
 	return ret;