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Commit b83e333a authored by Marek Szyprowski's avatar Marek Szyprowski Committed by Felipe Balbi
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usb: gadget: s3c-hsotg: add proper suspend/resume support 



This patch adds suspend/resume support to s3c-hsotg driver. It makes UDC
driver more power efficient.

Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Tested-by: default avatarRobert Baldyga <r.baldyga@samsung.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent aecbc31d

drivers/usb/gadget/s3c-hsotg.c

+49 −4
Original line number Diff line number Diff line
@@ -3774,10 +3774,55 @@ static int s3c_hsotg_remove(struct platform_device *pdev) 
	return 0;

}



#if 1

#define s3c_hsotg_suspend NULL

#define s3c_hsotg_resume NULL

#endif

static int s3c_hsotg_suspend(struct platform_device *pdev, pm_message_t state)

{

	struct s3c_hsotg *hsotg = platform_get_drvdata(pdev);

	unsigned long flags;

	int ret = 0;



	if (hsotg->driver)

		dev_info(hsotg->dev, "suspending usb gadget %s\n",

			 hsotg->driver->driver.name);



	spin_lock_irqsave(&hsotg->lock, flags);

	s3c_hsotg_disconnect(hsotg);

	s3c_hsotg_phy_disable(hsotg);

	hsotg->gadget.speed = USB_SPEED_UNKNOWN;

	spin_unlock_irqrestore(&hsotg->lock, flags);



	if (hsotg->driver) {

		int ep;

		for (ep = 0; ep < hsotg->num_of_eps; ep++)

			s3c_hsotg_ep_disable(&hsotg->eps[ep].ep);



		ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),

					     hsotg->supplies);

	}



	return ret;

}



static int s3c_hsotg_resume(struct platform_device *pdev)

{

	struct s3c_hsotg *hsotg = platform_get_drvdata(pdev);

	unsigned long flags;

	int ret = 0;



	if (hsotg->driver) {

		dev_info(hsotg->dev, "resuming usb gadget %s\n",

			 hsotg->driver->driver.name);

		ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),

				      hsotg->supplies);

	}



	spin_lock_irqsave(&hsotg->lock, flags);

	hsotg->last_rst = jiffies;

	s3c_hsotg_phy_enable(hsotg);

	s3c_hsotg_core_init(hsotg);

	spin_unlock_irqrestore(&hsotg->lock, flags);



	return ret;

}



#ifdef CONFIG_OF

static const struct of_device_id s3c_hsotg_of_ids[] = {