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Commit ab2a92e7 authored by Felipe Balbi's avatar Felipe Balbi
Browse files

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: 2b0f11df ("usb: dwc3: gadget: clear SUSPHY bit before ep cmds")
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent 3f308d17

drivers/usb/dwc3/gadget.c

+7 −5
Original line number Diff line number Diff line
@@ -258,12 +258,14 @@ 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.

	 */

	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) {

		int		needs_wakeup;