usb: dwc3: host: convey the PHYs to xhci

On some platforms a PHY may need to be handled also in the
host controller driver. Exynos5420 SoC requires some "PHY
tuning" based on the USB speed. This patch delivers dwc3's
PHYs to the xhci platform device when it's created.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Vivek Gautam <gautam.vivek@samsung.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index dcb8ca08459892a3979a56c83addce299aef13c0..12bfd3c5405e48c6225cfc7489fb747e1698d663 100644 (file)
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -29,8 +29,7 @@ int dwc3_host_init(struct dwc3 *dwc)
        xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
        if (!xhci) {
                dev_err(dwc->dev, "couldn't allocate xHCI device\n");
-               ret = -ENOMEM;
-               goto err0;
+               return -ENOMEM;
        }
 
        dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
@@ -60,22 +59,33 @@ int dwc3_host_init(struct dwc3 *dwc)
                goto err1;
        }
 
+       phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
+                         dev_name(&xhci->dev));
+       phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
+                         dev_name(&xhci->dev));
+
        ret = platform_device_add(xhci);
        if (ret) {
                dev_err(dwc->dev, "failed to register xHCI device\n");
-               goto err1;
+               goto err2;
        }
 
        return 0;
-
+err2:
+       phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
+                         dev_name(&xhci->dev));
+       phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
+                         dev_name(&xhci->dev));
 err1:
        platform_device_put(xhci);
-
-err0:
        return ret;
 }
 
 void dwc3_host_exit(struct dwc3 *dwc)
 {
+       phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
+                         dev_name(&dwc->xhci->dev));
+       phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
+                         dev_name(&dwc->xhci->dev));
        platform_device_unregister(dwc->xhci);
 }