diff options
| author | Robert Baldyga <r.baldyga@samsung.com> | 2014-09-09 10:44:57 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-19 16:16:39 -0700 |
| commit | d00b41428042e72d9dc2557d9147434a4e3d631f (patch) | |
| tree | 776137c63e669916ac083bb45285237daf42760f /drivers/usb | |
| parent | b203d0a2e32dd28e87780078f0789322862e4da8 (diff) | |
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>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 09f4cbd4fcb9..650a43ba79e5 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -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); } |