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Commit b870defe authored by Jingoo Han's avatar Jingoo Han Committed by Greg Kroah-Hartman
Browse files

USB: ohci-s3c2410: add PM support 



This patch adds power management support such as suspend and resume
functions.

Signed-off-by: default avatarJingoo Han <jg1.han@samsung.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent cc27c96c

drivers/usb/host/ohci-s3c2410.c

+53 −2
Original line number Diff line number Diff line
@@ -486,15 +486,66 @@ static int __devexit ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_PM

static int ohci_hcd_s3c2410_drv_suspend(struct device *dev)

{

	struct usb_hcd *hcd = dev_get_drvdata(dev);

	struct ohci_hcd *ohci = hcd_to_ohci(hcd);

	struct platform_device *pdev = to_platform_device(dev);

	unsigned long flags;

	int rc = 0;



	/*

	 * Root hub was already suspended. Disable irq emission and

	 * mark HW unaccessible, bail out if RH has been resumed. Use

	 * the spinlock to properly synchronize with possible pending

	 * RH suspend or resume activity.

	 */

	spin_lock_irqsave(&ohci->lock, flags);

	if (ohci->rh_state != OHCI_RH_SUSPENDED) {

		rc = -EINVAL;

		goto bail;

	}



	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);



	s3c2410_stop_hc(pdev);

bail:

	spin_unlock_irqrestore(&ohci->lock, flags);



	return rc;

}



static int ohci_hcd_s3c2410_drv_resume(struct device *dev)

{

	struct usb_hcd *hcd = dev_get_drvdata(dev);

	struct platform_device *pdev = to_platform_device(dev);



	s3c2410_start_hc(pdev, hcd);



	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);

	ohci_finish_controller_resume(hcd);



	return 0;

}

#else

#define ohci_hcd_s3c2410_drv_suspend	NULL

#define ohci_hcd_s3c2410_drv_resume	NULL

#endif



static const struct dev_pm_ops ohci_hcd_s3c2410_pm_ops = {

	.suspend	= ohci_hcd_s3c2410_drv_suspend,

	.resume		= ohci_hcd_s3c2410_drv_resume,

};



static struct platform_driver ohci_hcd_s3c2410_driver = {

	.probe		= ohci_hcd_s3c2410_drv_probe,

	.remove		= __devexit_p(ohci_hcd_s3c2410_drv_remove),

	.shutdown	= usb_hcd_platform_shutdown,

	/*.suspend	= ohci_hcd_s3c2410_drv_suspend, */

	/*.resume	= ohci_hcd_s3c2410_drv_resume, */

	.driver		= {

		.owner	= THIS_MODULE,

		.name	= "s3c2410-ohci",

		.pm	= &ohci_hcd_s3c2410_pm_ops,

	},

};