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Commit 1ae5799e authored by Valentine Barshak's avatar Valentine Barshak Committed by Greg Kroah-Hartman
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usb: hcd: Initialize USB phy if needed 



This adds external USB phy support to USB HCD driver that
allows to find and initialize external USB phy, bound to
the HCD, when the HCD is added.
The usb_add_hcd function returns -EPROBE_DEFER if the USB
phy, bound to the HCD, is not ready.
If no USB phy is bound, the HCD is initialized as usual.

Signed-off-by: default avatarValentine Barshak <valentine.barshak@cogentembedded.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 103e127d

drivers/usb/core/hcd.c

+18 −0
Original line number Diff line number Diff line
@@ -2589,6 +2589,24 @@ int usb_add_hcd(struct usb_hcd *hcd, 
	int retval;

	struct usb_device *rhdev;



	if (IS_ENABLED(CONFIG_USB_PHY) && !hcd->phy) {

		struct usb_phy *phy = usb_get_phy_dev(hcd->self.controller, 0);



		if (IS_ERR(phy)) {

			retval = PTR_ERR(phy);

			if (retval == -EPROBE_DEFER)

				return retval;

		} else {

			retval = usb_phy_init(phy);

			if (retval) {

				usb_put_phy(phy);

				return retval;

			}

			hcd->phy = phy;

			hcd->remove_phy = 1;

		}

	}



	dev_info(hcd->self.controller, "%s\n", hcd->product_desc);



	/* Keep old behaviour if authorized_default is not in [0, 1]. */