1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 2192a2873c7c..4c78a390c958 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -5587,3 +5587,22 @@ int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup,
         dev_dbg(hsotg->dev, "Host hibernation restore complete\n");
         return ret;
 }
+
+bool dwc2_host_can_poweroff_phy(struct dwc2_hsotg *dwc2)
+{
+        struct usb_device *root_hub = dwc2_hsotg_to_hcd(dwc2)->self.root_hub;
+
+        /* If the controller isn't allowed to wakeup then we can power off. */
+        if (!device_may_wakeup(dwc2->dev))
+                return true;
+
+        /*
+         * We don't want to power off the PHY if something under the
+         * root hub has wakeup enabled.
+         */
+        if (usb_wakeup_enabled_descendants(root_hub))
+                return false;
+
+        /* No reason to keep the PHY powered, so allow poweroff */
+        return true;
+}