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Commit d00b4142 authored by Robert Baldyga's avatar Robert Baldyga Committed by Greg Kroah-Hartman
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usb: dwc2/gadget: disable clock when it's not needed 



When device is stopped or suspended clock is not needed so we
can disable it for this time.

Signed-off-by: default avatarRobert Baldyga <r.baldyga@samsung.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b203d0a2

drivers/usb/dwc2/gadget.c

+9 −0
Original line number Diff line number Diff line
@@ -2893,6 +2893,8 @@ static int s3c_hsotg_udc_start(struct usb_gadget *gadget, 
	hsotg->gadget.dev.of_node = hsotg->dev->of_node;

	hsotg->gadget.speed = USB_SPEED_UNKNOWN;



	clk_enable(hsotg->clk);



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

				    hsotg->supplies);

	if (ret) {
@@ -2941,6 +2943,8 @@ static int s3c_hsotg_udc_stop(struct usb_gadget *gadget, 


	regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);



	clk_disable(hsotg->clk);



	return 0;

}
@@ -2972,8 +2976,10 @@ static int s3c_hsotg_pullup(struct usb_gadget *gadget, int is_on) 
	spin_lock_irqsave(&hsotg->lock, flags);

	if (is_on) {

		s3c_hsotg_phy_enable(hsotg);

		clk_enable(hsotg->clk);

		s3c_hsotg_core_init(hsotg);

	} else {

		clk_disable(hsotg->clk);

		s3c_hsotg_phy_disable(hsotg);

	}
@@ -3636,6 +3642,7 @@ static int s3c_hsotg_suspend(struct platform_device *pdev, pm_message_t state) 


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

					     hsotg->supplies);

		clk_disable(hsotg->clk);

	}



	return ret;
@@ -3650,6 +3657,8 @@ static int s3c_hsotg_resume(struct platform_device *pdev) 
	if (hsotg->driver) {

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

			 hsotg->driver->driver.name);



		clk_enable(hsotg->clk);

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

				      hsotg->supplies);

	}