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...@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
--
2.9.2
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