From aabb70752361a8b8ca44142a942a5bd133c4d304 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 30 Sep 2011 10:58:50 +0300 Subject: usb: dwc3: gadget: allow clock gating to work The dwc3 core has internal clock gating support. Let's allow that to happen by clearing the disable bit in GCTL register. Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/gadget.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/usb/dwc3/gadget.c') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 8d8502373db..fd1ac4dd560 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1164,6 +1164,14 @@ static int dwc3_gadget_start(struct usb_gadget *g, reg &= ~DWC3_GCTL_DISSCRAMBLE; reg |= DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_DEVICE); + switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams0)) { + case DWC3_GHWPARAMS1_EN_PWROPT_CLK: + reg &= ~DWC3_GCTL_DSBLCLKGTNG; + break; + default: + dev_dbg(dwc->dev, "No power optimization available\n"); + } + /* * WORKAROUND: DWC3 revisions <1.90a have a bug * when The device fails to connect at SuperSpeed -- cgit v1.2.3-70-g09d2