usb: hub: Add a new API to test if a hub device is root hub

[platform/kernel/u-boot.git] / common / usb_hub.c

diff --git a/common/usb_hub.c b/common/usb_hub.c
index 086b155..a8c2f56 100644 (file)
--- a/common/usb_hub.c
+++ b/common/usb_hub.c
@@ -67,6 +67,16 @@ static inline bool usb_hub_is_superspeed(struct usb_device *hdev)
        return hdev->descriptor.bDeviceProtocol == 3;
 }
 
+#ifdef CONFIG_DM_USB
+bool usb_hub_is_root_hub(struct udevice *hub)
+{
+       if (device_get_uclass_id(hub->parent) != UCLASS_USB_HUB)
+               return true;
+
+       return false;
+}
+#endif
+
 static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
 {
        unsigned short dtype = USB_DT_HUB;