usb: xhci: plat: Add USB 3.0 phy support

For Realtek SoC, the usb xhci uses different driver for u2phy and u3phy.
Therefore, add a hook to retrieve the USB 3.0 PHY to XHCI plat.

Signed-off-by: Stanley Chang <stanley_chang@realtek.com>
Link: https://lore.kernel.org/r/20230407060731.20537-1-stanley_chang@realtek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 76c5a84..b0c8e8e 100644 (file)
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -291,6 +291,21 @@ int xhci_plat_probe(struct platform_device *pdev, struct device *sysdev, const s
                        goto dealloc_usb2_hcd;
                }
 
+               xhci->shared_hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev,
+                           "usb-phy", 1);
+               if (IS_ERR(xhci->shared_hcd->usb_phy)) {
+                       if (PTR_ERR(xhci->shared_hcd->usb_phy) != -ENODEV)
+                               dev_err(sysdev, "%s get usb3phy fail (ret=%d)\n",
+                                            __func__,
+                                           (int)PTR_ERR(xhci->shared_hcd->usb_phy));
+                       xhci->shared_hcd->usb_phy = NULL;
+               } else {
+                       ret = usb_phy_init(xhci->shared_hcd->usb_phy);
+                       if (ret)
+                               dev_err(sysdev, "%s init usb3phy fail (ret=%d)\n",
+                                           __func__, ret);
+               }
+
                xhci->shared_hcd->tpl_support = hcd->tpl_support;
        }