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Commit 0acb9911 authored by Hemant Kumar's avatar Hemant Kumar
Browse files

usb: core: Power up SS phy before handling port suspend 



If SS phy is power down writing to PORTSC of SS port
gets stuck because pipe clock is off. Fix this issue
by powering up SS phy perform port suspend and power
it down.

Change-Id: I8a13c79255d50b4ddf32537e14d61f1d7fea9822
Signed-off-by: default avatarHemant Kumar <hemantk@codeaurora.org>
parent d0f60d48

drivers/usb/core/hub.c

+7 −0
Original line number Diff line number Diff line
@@ -3600,6 +3600,7 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg) 
{

	struct usb_hub		*hub = usb_get_intfdata(intf);

	struct usb_device	*hdev = hub->hdev;

	struct usb_hcd		*hcd = bus_to_hcd(hdev->bus);

	unsigned		port1;

	int			status;
@@ -3633,6 +3634,9 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg) 
	}



	if (hub_is_superspeed(hdev) && hdev->do_remote_wakeup) {

		if (!hdev->parent && hcd->primary_hcd)

			usb_phy_powerup(hcd->primary_hcd->usb3_phy);



		/* Enable hub to send remote wakeup for all ports. */

		for (port1 = 1; port1 <= hdev->maxchild; port1++) {

			status = set_port_feature(hdev,
@@ -3642,6 +3646,9 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg) 
					USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT,

					USB_PORT_FEAT_REMOTE_WAKE_MASK);

		}



		if (!hdev->parent && hcd->primary_hcd)

			usb_phy_powerdown(hcd->primary_hcd->usb3_phy);

	}



	dev_dbg(&intf->dev, "%s\n", __func__);