diff options
| author | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-05-17 14:55:58 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-06-20 12:32:37 +0300 |
| commit | ab2a92e7a608c09f13baf1730b9ba24c73c35d52 (patch) | |
| tree | bc7bf40a9ad86add4232a12ebcd199c710ede64d | |
| parent | 3f308d17d7abbf35a6d40a7f16dc70cf43f12c98 (diff) | |
usb: dwc3: gadget: only resume USB2 PHY in <=HIGHSPEED
As a micro-power optimization, let's only resume the
USB2 PHY if we're working on <=HIGHSPEED. If we're
gonna work on SUPERSPEED or SUPERSPEED+, there's no
point in resuming the USB2 PHY.
Fixes: 2b0f11df84bb ("usb: dwc3: gadget: clear SUSPHY bit before ep cmds")
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 378c14c45fcb..5e7b2ba8312b 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -258,11 +258,13 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd, * We will also set SUSPHY bit to what it was before returning as stated * by the same section on Synopsys databook. */ - reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); - if (unlikely(reg & DWC3_GUSB2PHYCFG_SUSPHY)) { - susphy = true; - reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; - dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); + if (dwc->gadget.speed <= USB_SPEED_HIGH) { + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); + if (unlikely(reg & DWC3_GUSB2PHYCFG_SUSPHY)) { + susphy = true; + reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); + } } if (cmd == DWC3_DEPCMD_STARTTRANSFER) { |