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

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Sometimes we need know if a given hub device is root hub or not.
Add a new API to test this. This removes the xHCI driver's own
version is_root_hub() and change to use the new API.

While we are here, remove the unused/commented out get_usb_device()
in the xHCI driver too.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Bin Meng
2017-07-19 21:51:11 +08:00
committed by Marek Vasut
parent a199a72448
commit 46c1d49330
3 changed files with 20 additions and 22 deletions
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10
common/usb_hub.c
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@@ -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;