Commit 5d240efd authored by Artur Petrosyan's avatar Artur Petrosyan Committed by Greg Kroah-Hartman
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usb: dwc2: Add exit clock gating from wakeup interrupt 



Added exit from clock gating mode when wakeup interrupt
is detected. To exit from the clock gating
in device mode "dwc2_gadget_exit_clock_gating()"
function is used with rem_wakeup parameter 0. To exit
clock gating in host mode "dwc2_host_exit_clock_gating()"
with rem_wakeup parameter 1.

Acked-by: default avatarMinas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: default avatarArtur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210413073630.EF2CEA0094@mailhost.synopsys.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent cbe1e903

drivers/usb/dwc2/core_intr.c

+22 −11
Original line number Diff line number Diff line
@@ -415,7 +415,8 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg) 
	if (dwc2_is_device_mode(hsotg)) {

		dev_dbg(hsotg->dev, "DSTS=0x%0x\n",

			dwc2_readl(hsotg, DSTS));

		if (hsotg->lx_state == DWC2_L2 && hsotg->in_ppd) {

		if (hsotg->lx_state == DWC2_L2) {

			if (hsotg->in_ppd) {

				u32 dctl = dwc2_readl(hsotg, DCTL);

				/* Clear Remote Wakeup Signaling */

				dctl &= ~DCTL_RMTWKUPSIG;
@@ -426,6 +427,12 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg) 
					dev_err(hsotg->dev,

						"exit partial_power_down failed\n");

				call_gadget(hsotg, resume);

			}



			/* Exit gadget mode clock gating. */

			if (hsotg->params.power_down ==

			    DWC2_POWER_DOWN_PARAM_NONE && hsotg->bus_suspended)

				dwc2_gadget_exit_clock_gating(hsotg, 0);

		} else {

			/* Change to L0 state */

			hsotg->lx_state = DWC2_L0;
@@ -440,6 +447,10 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg) 
						"exit partial_power_down failed\n");

			}



			if (hsotg->params.power_down ==

			    DWC2_POWER_DOWN_PARAM_NONE && hsotg->bus_suspended)

				dwc2_host_exit_clock_gating(hsotg, 1);



			/*

			 * If we've got this quirk then the PHY is stuck upon

			 * wakeup.  Assert reset.  This will propagate out and