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Date: Wed, 16 Jul 2014 12:22:29 +0200 From: Robert Baldyga <r.baldyga@...sung.com> To: balbi@...com Cc: paulz@...opsys.com, gregkh@...uxfoundation.org, linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, m.szyprowski@...sung.com, andrzej.p@...sung.com, Robert Baldyga <r.baldyga@...sung.com> Subject: [PATCH v2 11/12] 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@...sung.com> --- drivers/usb/dwc2/gadget.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 1b5e9ff..68b764e 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -2894,6 +2894,8 @@ 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) { @@ -2942,6 +2944,8 @@ 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; } @@ -2973,8 +2977,10 @@ 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); } @@ -3640,6 +3646,7 @@ 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; @@ -3654,6 +3661,8 @@ 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); } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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