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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: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Robert Baldyga 2014-09-09 10:44:57 +02:00 committed by Greg Kroah-Hartman
parent b203d0a2e3
commit d00b414280
1 changed files with 9 additions and 0 deletions
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9
drivers/usb/dwc2/gadget.c
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@ -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);
}