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Commit 57d04eb1 authored by Vikas Sajjan's avatar Vikas Sajjan Committed by Sarah Sharp
Browse files

usb: xhci: add the suspend/resume functionality 



Adds power management support to xHCI platform driver.

This patch facilitates the transition of xHCI host controller
between S0 and S3/S4 power states, during suspend/resume cycles.

Signed-off-by: default avatarAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: default avatarVikas C Sajjan <vikas.sajjan@linaro.org>
CC: Doug Anderson <dianders@chromium.org>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
parent 3b2f64d0

drivers/usb/host/xhci-plat.c

+26 −0
Original line number Original line Diff line number Diff line
@@ -186,11 +186,37 @@ static int xhci_plat_remove(struct platform_device *dev) 
	return 0;

	return 0;

}

}





#ifdef CONFIG_PM

static int xhci_plat_suspend(struct device *dev)

{

	struct usb_hcd	*hcd = dev_get_drvdata(dev);

	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);



	return xhci_suspend(xhci);

}



static int xhci_plat_resume(struct device *dev)

{

	struct usb_hcd	*hcd = dev_get_drvdata(dev);

	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);



	return xhci_resume(xhci, 0);

}



static const struct dev_pm_ops xhci_plat_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)

};

#define DEV_PM_OPS	(&xhci_plat_pm_ops)

#else

#define DEV_PM_OPS	NULL

#endif /* CONFIG_PM */



static struct platform_driver usb_xhci_driver = {

static struct platform_driver usb_xhci_driver = {

	.probe	= xhci_plat_probe,

	.probe	= xhci_plat_probe,

	.remove	= xhci_plat_remove,

	.remove	= xhci_plat_remove,

	.driver	= {

	.driver	= {

		.name = "xhci-hcd",

		.name = "xhci-hcd",

		.pm = DEV_PM_OPS,

	},

	},

};

};

MODULE_ALIAS("platform:xhci-hcd");

MODULE_ALIAS("platform:xhci-hcd");