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usb: dwc2: Add exit clock gating from wakeup interrupt

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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: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210413073630.EF2CEA0094@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Artur Petrosyan 2021-04-13 11:36:30 +04:00 committed by Greg Kroah-Hartman
parent cbe1e903e5
commit 5d240efddc
1 changed files with 22 additions and 11 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

33
drivers/usb/dwc2/core_intr.c
View file

@ -415,17 +415,24 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
if (dwc2_is_device_mode(hsotg)) { if (dwc2_is_device_mode(hsotg)) {
dev_dbg(hsotg->dev, "DSTS=0x%0x\n", dev_dbg(hsotg->dev, "DSTS=0x%0x\n",
dwc2_readl(hsotg, DSTS)); dwc2_readl(hsotg, DSTS));
if (hsotg->lx_state == DWC2_L2 && hsotg->in_ppd) { if (hsotg->lx_state == DWC2_L2) {
u32 dctl = dwc2_readl(hsotg, DCTL); if (hsotg->in_ppd) {
/* Clear Remote Wakeup Signaling */ u32 dctl = dwc2_readl(hsotg, DCTL);
dctl &= ~DCTL_RMTWKUPSIG; /* Clear Remote Wakeup Signaling */
dwc2_writel(hsotg, dctl, DCTL); dctl &= ~DCTL_RMTWKUPSIG;
ret = dwc2_exit_partial_power_down(hsotg, 1, dwc2_writel(hsotg, dctl, DCTL);
true); ret = dwc2_exit_partial_power_down(hsotg, 1,
if (ret) true);
dev_err(hsotg->dev, if (ret)
"exit partial_power_down failed\n"); dev_err(hsotg->dev,
call_gadget(hsotg, resume); "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 { } else {
/* Change to L0 state */ /* Change to L0 state */
hsotg->lx_state = DWC2_L0; 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"); "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 * If we've got this quirk then the PHY is stuck upon
* wakeup. Assert reset. This will propagate out and * wakeup. Assert reset. This will propagate out and