Sometimes we need know if a given hub device is root hub or not. Add a new API to test this.
Signed-off-by: Bin Meng bmeng.cn@gmail.com ---
common/usb_hub.c | 10 ++++++++++ include/usb.h | 8 ++++++++ 2 files changed, 18 insertions(+)
diff --git a/common/usb_hub.c b/common/usb_hub.c index 18bd827..d780251 100644 --- a/common/usb_hub.c +++ b/common/usb_hub.c @@ -74,6 +74,16 @@ 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; diff --git a/include/usb.h b/include/usb.h index eb82cc2..c504d71 100644 --- a/include/usb.h +++ b/include/usb.h @@ -776,6 +776,14 @@ int usb_setup_device(struct usb_device *dev, bool do_read, struct usb_device *parent);
/** + * usb_hub_is_root_hub() - Test whether a hub device is root hub or not + * + * @hub: USB hub device to test + * @return: true if the hub device is root hub, false otherwise. + */ +bool usb_hub_is_root_hub(struct udevice *hub); + +/** * usb_hub_scan() - Scan a hub and find its devices * * @hub: Hub device to scan