[PATCH] usb: dwc3: exynos: remove usb_phy_generic support

[Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>]

dwc3 driver is using the new Exynos5 SoC series USB DRD PHY driver
(PHY_EXYNOS5_USBDRD which selects GENERIC_PHY) as can be seen by
looking at the following commits:

  7a4cf0fde054 ("ARM: dts: Update DWC3 usb controller to use new
  phy driver for exynos5250")

  f070267b5fc1 ("ARM: dts: Enable support for DWC3 controller for
  exynos5420")

Thus remove unused usb_phy_generic support from dwc3 Exynos glue
layer.

[ The code that is being removed is harmful in the context of
  multi_v7_defconfig and enabling "EHCI support for Samsung
  S5P/EXYNOS SoC Series" (USB_EHCI_EXYNOS) + "OHCI support for
  Samsung S5P/EXYNOS SoC Series" (USB_OHCI_EXYNOS) because "EHCI
  support for OMAP3 and later chips" (USB_EHCI_HCD_OMAP) selects
  "NOP USB Transceiver Driver" (NOP_USB_XCEIV).  NOP USB driver
  attaches itself to usb_phy_generic platform devices created by
  dwc3 Exynos glue layer and later causes Exynos EHCI driver to
  fail probe and Exynos OHCI driver to hang on probe (as observed
  on Exynos5250 Arndale board). ]

Cc: Olof Johansson <olof@lixom.net>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Vivek Gautam <gautam.vivek@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
 drivers/usb/dwc3/dwc3-exynos.c |   68 -----------------------------------------
 1 file changed, 1 insertion(+), 67 deletions(-)

Index: b/drivers/usb/dwc3/dwc3-exynos.c
===================================================================
--- a/drivers/usb/dwc3/dwc3-exynos.c	2014-08-25 14:57:04.991781925 +0200
+++ b/drivers/usb/dwc3/dwc3-exynos.c	2014-08-27 09:16:38.312617727 +0200
@@ -23,15 +23,12 @@
 #include <linux/platform_data/dwc3-exynos.h>
 #include <linux/dma-mapping.h>
 #include <linux/clk.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/usb_phy_generic.h>
+#include <linux/pm_runtime.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/regulator/consumer.h>
 
 struct dwc3_exynos {
-	struct platform_device	*usb2_phy;
-	struct platform_device	*usb3_phy;
 	struct device		*dev;
 
 	struct clk		*clk;
@@ -39,61 +36,6 @@ struct dwc3_exynos {
 	struct regulator	*vdd10;
 };
 
-static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
-{
-	struct usb_phy_generic_platform_data pdata;
-	struct platform_device	*pdev;
-	int			ret;
-
-	memset(&pdata, 0x00, sizeof(pdata));
-
-	pdev = platform_device_alloc("usb_phy_generic", PLATFORM_DEVID_AUTO);
-	if (!pdev)
-		return -ENOMEM;
-
-	exynos->usb2_phy = pdev;
-	pdata.type = USB_PHY_TYPE_USB2;
-	pdata.gpio_reset = -1;
-
-	ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));
-	if (ret)
-		goto err1;
-
-	pdev = platform_device_alloc("usb_phy_generic", PLATFORM_DEVID_AUTO);
-	if (!pdev) {
-		ret = -ENOMEM;
-		goto err1;
-	}
-
-	exynos->usb3_phy = pdev;
-	pdata.type = USB_PHY_TYPE_USB3;
-
-	ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata));
-	if (ret)
-		goto err2;
-
-	ret = platform_device_add(exynos->usb2_phy);
-	if (ret)
-		goto err2;
-
-	ret = platform_device_add(exynos->usb3_phy);
-	if (ret)
-		goto err3;
-
-	return 0;
-
-err3:
-	platform_device_del(exynos->usb2_phy);
-
-err2:
-	platform_device_put(exynos->usb3_phy);
-
-err1:
-	platform_device_put(exynos->usb2_phy);
-
-	return ret;
-}
-
 static int dwc3_exynos_remove_child(struct device *dev, void *unused)
 {
 	struct platform_device *pdev = to_platform_device(dev);
@@ -127,12 +69,6 @@ static int dwc3_exynos_probe(struct plat
 
 	platform_set_drvdata(pdev, exynos);
 
-	ret = dwc3_exynos_register_phys(exynos);
-	if (ret) {
-		dev_err(dev, "couldn't register PHYs\n");
-		return ret;
-	}
-
 	clk = devm_clk_get(dev, "usbdrd30");
 	if (IS_ERR(clk)) {
 		dev_err(dev, "couldn't get clock\n");
@@ -194,8 +130,6 @@ static int dwc3_exynos_remove(struct pla
 	struct dwc3_exynos	*exynos = platform_get_drvdata(pdev);
 
 	device_for_each_child(&pdev->dev, NULL, dwc3_exynos_remove_child);
-	platform_device_unregister(exynos->usb2_phy);
-	platform_device_unregister(exynos->usb3_phy);
 
 	clk_disable_unprepare(exynos->clk);