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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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8
include/usb.h
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@@ -775,6 +775,14 @@ struct usb_device *usb_get_dev_index(struct udevice *bus, int index);
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
*