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dm: usb: Do not assume that first child is always a hub

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On some single port (otg) controllers there is no emulated root hub, so
the first child (if any) may be one of: UCLASS_MASS_STORAGE,
UCLASS_USB_DEV_GENERIC or UCLASS_USB_HUB.

All three of these (and in the future others) are suitable for our
purposes, remove the check for the device being a hub, and add a check to
deal with the fact that there may be no child-dev.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Hans de Goede
2015-06-17 21:33:53 +02:00
committed by Simon Glass
parent b2f219b081
commit fd1bd21bf0
2 changed files with 9 additions and 10 deletions
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10
drivers/usb/host/usb-uclass.c
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@@ -303,14 +303,14 @@ static struct usb_device *find_child_devnum(struct udevice *parent, int devnum)
struct usb_device *usb_get_dev_index(struct udevice *bus, int index)
{
struct udevice *hub;
struct udevice *dev;
int devnum = index + 1; /* Addresses are allocated from 1 on USB */
device_find_first_child(bus, &hub);
if (device_get_uclass_id(hub) == UCLASS_USB_HUB)
return find_child_devnum(hub, devnum);
device_find_first_child(bus, &dev);
if (!dev)
return NULL;
return NULL;
return find_child_devnum(dev, devnum);
}
int usb_post_bind(struct udevice *dev)