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Commit dd4a9bfb authored by Sriharsha Allenki's avatar Sriharsha Allenki Committed by Ajay Agarwal
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xhci-plat: Add hibernation support to xhci platform 



Add hibernation support to xhci platform by adding
the proper PM ops freeze and restore.
Also set the hibernated argument to xhci_resume which
will trigger the reset-resume of the connected
root-hubs and the devices.

Change-Id: Ib536bb2485928326f34bfc3422b672cc62309efe
Signed-off-by: default avatarSriharsha Allenki <sallenki@codeaurora.org>
Signed-off-by: default avatarAjay Agarwal <ajaya@codeaurora.org>
parent 6a6d52ab

drivers/usb/host/xhci-plat.c

+38 −1
Original line number Diff line number Diff line
@@ -370,6 +370,39 @@ static int xhci_plat_runtime_idle(struct device *dev) 
	return -EBUSY;

}



static int xhci_plat_pm_freeze(struct device *dev)

{

	struct usb_hcd *hcd = dev_get_drvdata(dev);

	struct xhci_hcd *xhci = hcd_to_xhci(hcd);



	if (!xhci)

		return 0;



	dev_dbg(dev, "xhci-plat freeze\n");



	return xhci_suspend(xhci, false);

}



static int xhci_plat_pm_restore(struct device *dev)

{

	struct usb_hcd *hcd = dev_get_drvdata(dev);

	struct xhci_hcd *xhci = hcd_to_xhci(hcd);

	int ret;



	if (!xhci)

		return 0;



	dev_dbg(dev, "xhci-plat restore\n");



	ret = xhci_resume(xhci, true);

	pm_runtime_disable(dev);

	pm_runtime_set_active(dev);

	pm_runtime_enable(dev);

	pm_runtime_mark_last_busy(dev);



	return ret;

}



static int xhci_plat_runtime_suspend(struct device *dev)

{

	struct usb_hcd *hcd = dev_get_drvdata(dev);
@@ -401,7 +434,11 @@ static int xhci_plat_runtime_resume(struct device *dev) 
}



static const struct dev_pm_ops xhci_plat_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)

	.suspend	= xhci_plat_suspend,

	.resume		= xhci_plat_resume,

	.freeze		= xhci_plat_pm_freeze,

	.restore	= xhci_plat_pm_restore,

	.thaw		= xhci_plat_pm_restore,

	SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend, xhci_plat_runtime_resume,

			   xhci_plat_runtime_idle)

};