[PATCH v2 3/3] usb: dwc3: Enable USB 3.0 phy driver

[Ran Wang]

Adds entry point at dwc3 core init function to enable
USB 3.0 PHY driver.

Signed-off-by: Ran Wang <ran.wan...@nxp.com>
---
Change in v2:
        - New file

 drivers/usb/dwc3/core.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 03474d3575ab..a9df03c64a7b 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -746,6 +746,8 @@ static int dwc3_core_init(struct dwc3 *dwc)
 {
        u32                     reg;
        int                     ret;
+       int                     retval;
+       struct phy *phy;
 
        if (!dwc3_core_is_valid(dwc)) {
                dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
@@ -770,6 +772,19 @@ static int dwc3_core_init(struct dwc3 *dwc)
        if (ret)
                goto err0;
 
+       phy = phy_get(dwc->dev, "usb-phy");
+       if (IS_ERR(phy)) {
+               retval = PTR_ERR(phy);
+               if (retval == -EPROBE_DEFER)
+                       dev_dbg(dwc->dev, "usb-phy no found\n");
+       } else {
+               retval = phy_init(phy);
+               if (retval) {
+                       phy_put(phy);
+                   dev_dbg(dwc->dev, "phy_init() error!\n");
+               }
+       }
+
        ret = dwc3_core_soft_reset(dwc);
        if (ret)
                goto err0;
-- 
2.14.1