usb: hcd: Initialize USB phy if needed (1ae5799e) · Commits · 戴 / test

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:

Valentine Barshak <valentine.barshak@cogentembedded.com> Signed-off-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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]. */

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