Proof of concept, needs to be made compilable and add the unwind path on error and remove.

Bodged-together-by: Grant Likely grant.likely@secretlab.ca ---

Resend... I messed up Deepak's email addr.

g.

drivers/usb/core/hub.c | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 96f05b2..bafd31d 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1856,6 +1856,8 @@ fail: */ int usb_new_device(struct usb_device *udev) { + struct device_node *np = udev->bus->dev.of_node; + struct device_node *child; int err;

if (udev->parent) { @@ -1864,6 +1866,17 @@ int usb_new_device(struct usb_device *udev) * sysfs power/wakeup controls wakeup enabled/disabled */ device_init_wakeup(&udev->dev, 0); + + /* Grab the device node for the hub */ + np = udev->parent->dev.of_node; + } + + /* Do we have a device tree node for this USB device? */ + if (np) { + for_each_child_of_node(child, np) { + if (value_of_reg_property(child) == udev->portnum) + udev->dev.of_node = of_node_get(child); + } }

/* Tell the runtime-PM framework the device is active */